10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2023

FOR THE TRANSITION PERIOD FROM TO

Commission File Number 001-39538

CalciMedica, Inc.

(Exact name of Registrant as specified in its Charter)

505 Coast Boulevard South, Suite 307

La Jolla, CA92037

(Address of principal executive offices including zip code)

Registrant’s telephone number, including area code: (858) 952-5500

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, par value $0.0001 per share CALC The Nasdaq Capital Market

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes☐No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐ No☒

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes☒No☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yes☒No☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☐ Accelerated filer ☐

Non-accelerated filer ☒ Smaller reporting company ☒

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☐No☒

As of June 30, 2023, the last business day of the registrant’s most recently completed second fiscal quarter, the aggregate market value of common stock held by

non-affiliates of the registrant computed by the closing price of the registrant’s common stock on June 30, 2023 on the Nasdaq Capital Market was approximately $11.7 million. Shares of common stock held by each executive officer, director and their affiliated holders have been excluded in that such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

The number of shares of Registrant’s Common Stock outstanding as of March 21, 2024 was 10,740,115

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive Proxy Statement (the “Proxy Statement”) for the 2024 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than April 29, 2024 are incorporated by reference into Part III of this Annual Report on Form 10-K.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains forward-looking statements about us and our industry that involve substantial risks and uncertainties. All statements, other than statements of historical facts contained in this Annual Report on Form 10-K, including statements regarding our future financial condition, business strategy and plans, and objectives of management for future operations, are forward-looking statements. In some cases you can identify these statements by forward-looking words such as “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,” “intend,” “could,” “would,” “project,” “plan,” “expect” or the negative or plural of these words or similar expressions. These forward-looking statements include, but are not limited to, statements concerning the following:

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our expectations regarding the success, cost and timing of our development activities, non-clinical studies and clinical trials;

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our expectations regarding the timing and outcome of our current and future clinical trials, and the reporting of data from those trials;

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our research and development plans;

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the potential of our technologies and our ability to execute on our corporate strategy;

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our ability to attract and retain key scientific, medical, commercial and management personnel;

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our ability to fund our working capital needs;

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the strength and breadth of our patent portfolio;

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the therapeutic potential of Auxora and our other product candidates and the expected patient populations, market opportunities, commercial potential and commercialization strategy thereof;

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our expectations regarding our cash runway and expected use of cash, cash equivalents and short-term investment;

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our need to obtain additional funding and the ability to obtain such funding for our operations, including funding necessary to develop and commercialize our product candidates, subject to regulatory approvals:

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our ability and plans to contract with third-party suppliers and manufacturers and their ability to perform adequately;

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our expected competitive position;

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our ability to develop and maintain our corporate infrastructure, including our ability to design and maintain an effective system of internal controls;

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legislative and regulatory developments in the United States and other foreign countries;

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potential claims relating to our intellectual property or other legal proceedings;

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our expectations regarding future economic conditions or our financial performance;

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our ability to obtain and adequately protect intellectual property rights for our product candidates;

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our ability to obtain regulatory approval for our product candidates and any related restrictions, limitations and/or warnings in the label of any approved product candidate;

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our ability to extend our operating capital;

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our ability to continue to satisfy the Nasdaq listing requirements and have our stock continue to trade on Nasdaq; and

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statements of belief and any statement of assumptions underlying any of the foregoing.

These statements are only current predictions and are subject to known and unknown risks, uncertainties and other factors that may cause our or our industry’s actual results, levels of activity, performance or achievements to be materially different from those anticipated by the forward-looking statements. We discuss many of these risks in greater detail under the heading “Risk Factors” and elsewhere in this Annual Report on Form 10-K. You should not rely upon forward-looking statements as predictions of future events. New risk factors and uncertainties may emerge from time to time, and it is not possible for management to predict all risks and uncertainties.

Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements. Except as required by law, after the date of this report, we are under no duty to update or revise any of the forward-looking statements, whether as a result of new information, future events or otherwise.

We obtained industry, market and competitive position data in this report from our own internal estimates and research as well as from industry and general publications and research surveys and studies conducted by third parties. These data involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such information or estimates.

Summary of risks associated with our business

An investment in our common stock involves a high degree of risk. Below is a list of the more significant risks associated with our business. This summary does not address all of the risks that we face. Additional discussion of the risks listed in this summary, as well as other risks that we face, are set forth under Part I, Item 1A, “Risk Factors” in this Annual Report on Form 10-K. These risks include, but are not limited to, the following:

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We are a clinical-stage biopharmaceutical company with a limited operating history. We have incurred net losses since our inception and anticipate that we will continue to incur significant losses for the foreseeable future. We have never generated any revenue from product sales and may never be profitable.

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We will need to obtain substantial additional funding to complete the development and any commercialization of our product candidates. If we are unable to raise this capital when needed, on acceptable terms, or at all, we may be forced to delay, reduce or eliminate the development of our product candidates or other operations.

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Raising additional capital may cause dilution to our stockholders, restrict our operations or require us to relinquish rights to our proprietary platform or product candidates.

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Any acquisitions or strategic collaborations may increase our capital requirements, dilute our stockholders, cause us to incur debt or assume contingent liabilities or subject us to other risks.

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Our proprietary CRAC channel inhibition science is based on novel technologies that are unproven and may not result in approvable or marketable products, which exposes us to unforeseen risks and makes it difficult for us to predict the time and cost of product development and potential for regulatory approval and we may not be successful in our efforts to use and expand our science to build a pipeline of product candidates.

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Our business is highly dependent on the success of our product candidates, in particular Auxora, and we may fail to develop Auxora successfully or be unable to obtain regulatory approval.

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Clinical development is a lengthy, expensive and uncertain process. The results of preclinical studies and early clinical trials are not always predictive of future results. Any product candidate that we advance into clinical trials may not achieve favorable results in later clinical trials, if any, or receive marketing approval.

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We have expanded to and plan to conduct a significant portion of our ongoing CARPO trial in India, and regulatory authorities may not accept data from such trial or any future clinical trials we conduct outside the United States or the applicable foreign jurisdiction.

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We depend on enrollment of patients in our clinical trials for our product candidates. If we experience delays or difficulties enrolling patients in our clinical trials, our research and development efforts and business, financial condition, results of operations and prospects could be adversely affected.

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We rely on third parties to conduct and perform most of our research, preclinical studies and clinical trials. If these third parties do not satisfactorily carry out their contractual duties, fail to comply with applicable regulatory requirements, fail to meet projected clinical trial enrollment schedules or fail to meet expected deadlines, our development programs may be delayed or subject to increased costs, each of which may have an adverse effect on our business and prospects.

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We contract with third parties for the manufacturing and supply of certain goods and services for our product candidates for use in preclinical studies and clinical trials, which supply may become limited or interrupted or may not be of satisfactory quality and quantity.

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Any approved product candidates may fail to achieve the degree of market acceptance by physicians, patients, hospitals, healthcare payors and others in the medical community necessary for commercial success.

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We may not be able to successfully commercialize our product candidates due to unfavorable pricing regulations or third-party coverage and reimbursement policies, which could make it difficult for us to sell our product candidates profitably.

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We are highly dependent on our key personnel, and if we are not successful in attracting and retaining highly qualified personnel, we may not be able to continue to successfully develop or commercialize our product candidates or otherwise implement our business plan.

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If we are unable to obtain and maintain sufficient intellectual property protection for Auxora, any future product candidates, and other proprietary technologies we develop, or if the scope of the intellectual property protection obtained is not sufficiently broad, our competitors could develop and commercialize products similar or identical to ours, and our ability to successfully commercialize Auxora, any future product candidates, and other proprietary technologies if approved, may be adversely affected.

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Our business operations may subject us to disputes, claims and lawsuits, which may be costly and time-consuming and could materially and adversely impact our financial position and results of operations.

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EXPLANATORY NOTE

On March 20, 2023, the Delaware corporation formerly known as “Graybug Vision, Inc.” completed its merger transaction in accordance with the terms and conditions of the Agreement and Plan of Merger and Reorganization, dated as of November 21, 2022, as amended on February 10, 2023 (the “Merger Agreement”), by and among Graybug Vision, Inc. (“Graybug”), Camaro Merger Sub, Inc., a wholly owned subsidiary of Graybug (“Merger Sub”), and CalciMedica, Inc. (“Private CalciMedica”), pursuant to which Merger Sub merged with and into Private CalciMedica, with Private CalciMedica surviving the merger as a wholly owned subsidiary of Graybug (the “Merger”). Additionally, on March 20, 2023, the Company changed its name from “Graybug Vision, Inc.” to “CalciMedica, Inc.” (the “Company”).

On March 17, 2023, in connection with the transactions contemplated by the Merger Agreement, Graybug filed an Amended and Restated Certificate of Incorporation effecting a reverse stock split of Graybug’s common stock at a ratio of 14:1 (the “Reverse Stock Split”). As a result of the Reverse Stock Split, the number of issued and outstanding shares of Graybug’s common stock immediately prior to the Reverse Stock Split was reduced into a smaller number of shares, such that every 14 shares of Graybug’s common stock held by a stockholder immediately prior to the Reverse Stock Split were combined and reclassified into one share of common stock after the Reverse Stock Split. The information in this Annual Report on Form 10-K as of and for the periods prior to the effective date of the Merger gives effect to the Reverse Stock Split.

Since Private CalciMedica was determined to be the accounting acquirer in connection with the Merger, for periods prior to the Merger, the consolidated financial statements were prepared on a stand-alone basis for Private CalciMedica and did not include the combined entities’ activity or financial position. Subsequent to the Merger, the consolidated financial statements as of and for the twelve months ended December 31, 2023 include Graybug’s activity from March 21, 2023 through December 31, 2023, and assets and liabilities at their acquisition date fair value. Historical share and per share figures of Private CalciMedica have been retroactively restated based on the exchange ratio of 0.0288.

In this Annual Report on Form 10-K, unless the context indicates otherwise, the terms “Company,” “CalciMedica,” “we,” “us,” and “our” refer to (i) Graybug Vision, Inc., for periods prior to the effectiveness of the Merger and (ii) CalciMedica, Inc. (as a combined company) for periods following the effectiveness of the Merger.

This Annual Report on Form 10-K contains references to trademarks belonging to other entities, which are the property of their respective holders. We do not intend our use or display of other companies’ trade names or trademarks to imply a relationship with, or endorsement or sponsorship of us by, any other companies.

Table of Contents

Page

PART I

Item 1. Business 2

Item 1A. Risk Factors 52

Item 1B. Unresolved Staff Comments 103

Item 1C. Cybersecurity 103

Item 2. Properties 104

Item 3. Legal Proceedings 105

Item 4. Mine Safety Disclosures 105

PART II

Item 6. [Reserved] 106

Item 7A. Quantitative and Qualitative Disclosures About Market Risk 118

Item 8. Financial Statements and Supplementary Data 118

Item 9A. Controls and Procedures 118

Item 9B. Other Information 119

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections 119

PART III

Item 10. Directors, Executive Officers and Corporate Governance 120

Item 11. Executive Compensation 120

Item 14. Principal Accounting Fees and Services 120

PART IV

Item 15. Exhibits, Financial Statement Schedules 121

Item 1. Business.

Overview

Company Overview

We are a clinical-stage biopharmaceutical company focused on developing therapeutics that treat serious illnesses driven by inflammatory and immunologic processes and direct cellular damage. Our product candidates act upon calcium release-activated calcium (“CRAC”) channels, and would constitute a new class of drugs.

We are a company focused on the discovery and development of CRAC channel inhibitors. Clinical and preclinical data have demonstrated that the inhibition of CRAC channels may have a therapeutic effect based on a dual mechanism involving both anti-inflammatory and tissue cell protective activities. Our work has shown compelling evidence of the involvement of CRAC channels in a broad spectrum of both acute critical illnesses and chronic diseases that have the common thread of inflammation or immunologic activity in their pathogenesis. We intend to leverage our CRAC channel inhibitor platform to develop therapeutics for indications where this dual mechanism of action has the potential for clinical benefit.

Our lead product candidate is Auxora, a potent and selective intravenous (“IV”) formulated small molecule CRAC channel inhibitor containing the active compound zegocractin (formerly referred to as CM4620) that, in animal models, reduced acute epithelial and/or endothelial cell injury and inflammation in organs, such as the pancreas, lungs and kidneys. Multiple Phase 2 clinical trials with Auxora have been conducted: an open-label trial in acute pancreatitis (“AP”), an investigator led open label trial in asparaginase induced pancreatic toxicity (“AIPT”)(which we also refer to as “CRSPA”) in which the first cohort of patients has been completed, a placebo-controlled double-blind trial in severe COVID-19 pneumonia (which we also refer to as “CARDEA”) and an investigator led open-label trial in COVID-19 pneumonia patients with acute respiratory distress syndrome (“ARDS”). We observed in all of these trials that patients treated with Auxora experienced a reduced time to recovery and a reduction of organ damage. We believe the consistency of the results we observed from these trials in two different acute critical care conditions are mutually supportive and reinforce our plans to further pursue the use of Auxora in several additional acute critical illnesses.

In a Phase 2a trial conducted in the United States in patients with AP and accompanying systemic inflammatory response syndrome (“SIRS”) along with hypoxemia (low concentration of oxygen in blood), a greater proportion of patients treated with Auxora compared to standard of care (“SOC”) alone experienced resolution of persistent SIRS (SIRS lasting 48 hours or more) and tolerated solid food at 72 hours, an indicator of disease resolution. The majority of patients with respiratory failure treated with Auxora did not require mechanical ventilation. This resulted in hospital discharge for patients treated with Auxora more than two days earlier than those treated with SOC alone. These findings were published in the peer-reviewed journal Pancreas in 2021. We are currently conducting a blinded placebo-controlled Phase 2b trial in the United States in patients with AP and accompanying SIRS (which we also refer to as “CARPO”). We anticipate topline results from the CARPO trial in the second quarter of 2024 and, assuming positive results, to initiate our Phase 3 trial in 2025.

CRSPA, a Phase 1/2 single arm 24-patient trial, is currently being conducted in the United States in pediatric patients with acute lymphoblastic leukemia (“ALL”) who have developed pancreatitis as a side-effect of asparaginase or AIPT. CRSPA is an investigator-sponsored trial being conducted by St. Jude Children’s Research Hospital (“SJCRH”). AIPT is a particularly severe form of pancreatitis and historical data suggests that over half of the patients will develop pancreatic necrosis or pseudocysts and may not receive further asparaginase treatments for their ALL, potentially impacting their prognosis, and develop long term health complications including chronic pancreatitis. The first cohort of nine patients in this trial has been completed, and, the results were presented at the American Society of Hematology (“ASH”) meeting in December 2023. Eight of nine patients in the CRSPA study received a full regimen of four daily doses of Auxora and these patients were compared to a matched historical controlgroup of patients who developed AIPT within 30 days of receiving asparaginase in the Total Therapy XVI study (T16) being conducted at SJCRH. Treatment with Auxora, as compared to the matched historical control group, was shown to have the potential to reduce the severity of AIPT in pediatric patients with ALL. Study results showed that Auxora reduced the average number of days patients spent in the hospital and the need for care in the intensive care unit (“ICU”). Additionally, no patients in the CRSPA study required total parenteral nutrition (“TPN”), compared to over half the patients the matched historical control group, who required approximately several weeks of nutritional support on average. Finally, blinded central reading of pancreatic imaging showed a reduction in the development of significant pancreatic necrosis and the severity of acute pancreatitis in patients treated with Auxoracompared to the matched historical control group. This trial has expanded to additional sites and we expect data in 2025.

In addition to AP and AIPT, we are conducting a Phase 2 randomized double-blind, placebo-controlled trial in patients with severe acute kidney injury (“AKI”) that also have acute hypoxemic respiratory failure (AHRF”), which we call KOURAGE. KOURAGE will evaluate 150 patients with stage 2 and stage 3AKI who have AHRF and are receiving oxygen either by non-invasive mechanical ventilation, high flow nasal cannula or intermittent mandatory ventilation (“IMV”). Patients will be stratified by classification of stage of AKI as well as the use of IMV. Patients will receive either a four-hour infusion of Auxora or placebo at 1.25 mL/kg as a first dose,

after which they will receive Auxora or placebo at 1.0 mL/kg at hours 24, 48, 72 and 96. The primary endpoint of the trial will be evaluation of patients through day 30 to determine days alive, ventilator-free and dialysis-free. Secondary endpoints will include a composite of all-cause mortality,decrease in estimated glomerular filtration rate (“eGFR”), and the incidence of dialysis over a period of 90 days, also known as MAKE-90 (Major Adverse Kidney Events at 90 days). In February 2024, we received clearance from the U.S. Food and Drug Administration (“FDA”) of our Investigation New Drug Application (“IND”) for a Phase 2 clinical trial of Auxora for the treatment of AKI patients with AHRF called KOURAGE, which we plan to initiate in the second quarter of 2024 with data expected in 2025.

In our CARDEA trial, a Phase 2 randomized double-blind, placebo-controlled trial in patients with severe COVID-19 pneumonia and receiving supplemental oxygen, but not on mechanical ventilation, we observed that patients treated with Auxora experienced a reduced time to recovery and a 56% relative reduction in mortality at 30 days (p=0.0165) and a 33% relative reduction in mortality at 60 days (p=0.1449) compared to placebo. Time to recovery was seven days for Auxora-treated patients compared to ten days for patients receiving placebo (p=0.098). For additional information regarding p-values, please refer to the section entitled “ —Auxora, a Selective CRAC Channel Inhibitor—P-Values and Confidence Intervals.” The results from CARDEA were published in Critical Care in 2022. The CARDEA data, along with data from an ongoing Phase 2 trial testing Auxora in COVID-19 patients with ARDS receiving invasive mechanical ventilation, may also help inform future trials in broader ARDS and AHRF patient populations.

Finally, we have compiled additional preclinical data supporting the potential to use CRAC channel inhibition for both chronic and acute inflammatory and immunologic diseases. We have available product candidates and have chosen CM6336 for IND-enabling preclinical testing to determine its pharmacokinetics and safety for potential oral dosing. We have animal model data suggesting CRAC channel inhibition may be useful in treating chronic pancreatitis, rheumatoid arthritis, ulcerative colitis, allergic asthma, and traumatic brain injury. We plan to submit an IND to the FDA for CM6336 in 2025, for the treatment of chronic pancreatitis and rheumatoid arthritis.

Calcium is an important regulator of multiple biological functions, and in electrically non-excitable cells CRAC channel activation plays a critical role in the activation of calcium-dependent pathways that modulate various responses, including inflammation and vascular permeability. In immune cells, activation of CRAC channels is a key step in initiating the adaptive immune response and the generation of inflammatory cytokines. In addition, in certain acute critical illnesses, CRAC channels on affected organ tissue cells can become overactivated, resulting in excess calcium entry into cells. This excess calcium can cause cellular injury and necrosis, or activate apoptosis signaling pathways leading to programmed cell death further exacerbating the damage caused by inflammatory response. We have developed novel cell-based assays for compound screening that enabled us to identify and optimize a portfolio of potent and selective small molecule CRAC channel inhibitors, including zegocractin (previously referred to as “CM4620”) that is the active ingredient in Auxora, from several different chemical classes. These compounds each have different pharmaceutic and pharmacokinetic properties and comprise our portfolio of CRAC channel inhibitors.

Our Pipeline

We are currently developing our lead compound Auxora in several acute critical illnesses. We have a Phase 2b trial ongoing in AP and an investigator led Phase 1/2 trial ongoing in AIPT. In addition, we are conducting a Phase 2 randomized, double-blind, placebo-controlled trial in patients with AKI that also have AHRF which we expect to initiate in the second quarter of 2024.

Our product candidates are summarized in the table below:

Clinical Experience with Auxora

Our clinical experience with Auxora is summarized in the table below:

We have studied Auxora in a number of clinical trials including multiple Phase 2 clinical trials conducted in the United States, two of which have been in our lead indication, AP. We have published results from an open-label SOC controlled Phase 2a trial in AP, results from treating the first cohort of patients in CRSPA have been presented. We have also published results from CARDEA and the 30-patient open-label part one portion of this same trial. With our investigators, we have completed a biomarker analysis with samples taken from over 190 CARDEA patients and have posted the data on-line while it undergoes peer review for formal publication. We observed in all of these trials that patients treated with Auxora experienced a reduced time to recovery and a reduction of organ damage. In CARDEA, we observed a statistically significant 56% relative risk reduction in mortality at 30 days. We believe the consistency of the results we observed from these trials in multiple acute critical care conditions affecting different primary organs are mutually supportive and reinforce our plans to further pursue the use of Auxora in several additional acute critical illnesses.

Auxora for the Treatment of AP

AP with SIRS

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Completed open-label Phase 2a clinical trial. We completed a randomized, open-label Phase 2a clinical trial of Auxora in 21 patients with AP and accompanying SIRS who also had hypoxemia at presentation. Patients in this trial treated with Auxora in addition to SOC had multiple improved outcomes compared to patients treated with standard care alone. In addition, there were several patients with severe respiratory failure at enrollment and the majority of those treated with Auxora did not require mechanical ventilation. Results from this randomized, open-label Phase 2a clinical trial conducted in the United States were published in March 2021 in the peer- reviewed journal Pancreas. We have received Fast Track designation from the FDA and orphan drug designation in the European Union (“EU”) from the European Medicines Agency (“EMA”) for Auxora for the treatment of AP. However, there is no guarantee that Fast Track designation will result in a faster regulatory review or regulatory approval, if at all.

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Ongoing Phase 2b clinical trial. We are currently conducting CARPO in the United States, a Phase 2b clinical trial in 216 patients with AP and accompanying SIRS. In the third quarter of 2023, we expanded the trial internationally and expect a significant portion of the enrollment in India. We anticipate topline results from our CARPO trial in the second quarter of 2024 and, assuming positive results, to initiate our Phase 3 trial in 2025. We do not currently have any marketing plans for our product candidates for AP in India.

Auxora for the Treatment of AIPT: Pancreatitis as a Side Effect of Treatment for Pediatric ALL

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Ongoing Phase 1/2 clinical trial. CRSPA, an investigator led 24-patient Phase 1/2 trial, is being conducted in the United States in children who develop AIPT related to the use of the chemotherapeutic asparaginase in the course of their treatment for ALL. We believe this work is providing valuable information on the use of Auxora in critically ill pediatric patients. The first cohort of nine patients in this trial has been completed and the data presented at ASH in December 2023 showed

that all patients who received a full course of Auxora treatment had a more rapid resolution of their symptoms as compared to historical controls. These patients spent less time in the hospital or intensive care unit and blinded central reading of pancreatic imaging showed reduction in the development of significant pancreatic necrosis and the severity of acute pancreatitis as compared to the historical control group, 27% of whom had greater than 30% necrosis of their pancreas at 30 days as compared to none of the Auxora treated patients. Over 50% of patients in the control group received TPN for several weeks on average and none received TPN in the treatment group. This trial has expanded to additional sites and we expect our collaborators to have data in 2025.

Auxora for the Treatment of Acute Kidney Injury

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Planned Phase 2 clinical trial. In February 2024, we received clearance from the FDA of our IND for a Phase 2 clinical trial of Auxora for the treatment of AKI patients with AHRF which we call KOURAGE and which we plan to initiate in the second quarter of 2024 with data expected in 2025. KOURAGE is a randomized, double-blind, placebo-controlled study that will evaluate 150 patients with Stage 2 and 3 AKI who have AHRF and are receiving oxygen by non-invasive mechanical ventilation, high flow nasal cannula or IMV.

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Clinical observations of Auxora for AKI. We have both clinical observations and pre-clinical data that support the development of Auxora in AKI. In our CARDEA trial, which studied Auxora in patients with severe and critical COVID-19 pneumonia, results showed a 40% reduction in reported AKI (a common consequence of COVID-19 pneumonia) in Auxora-treated patients as compared to placebo-treated patients. In a post-hoc analysis of patients with compromised kidney function (eGFR< 60 mL/min/1.73 m2) at enrollment, there was a survival benefit for patients treated with Auxora compared to those on placebo. Biomarker analysis from blood samples taken from over 190 CARDEA patients further showed that Auxora had positive effects on biomarkers that are independently associated with both hospital mortality and long term adverse outcomes.

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Preclinical studies for Auxora in AKI.CalciMedica’s pre-clinical studies in an ischemia/reperfusion injury model of AKI in rats showed promising results, whereby animals receiving three daily doses of Auxora after injury had improvements in their GFR values while rats receiving placebo had little improvement. Further, in the setting of severe kidney injury, rats receiving Auxora survived where as those receiving placebo died.

Auxora for the Treatment of Acute Respiratory Failure

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Completed open-label Phase 2 clinical trial in 30 hospitalized COVID-19 pneumonia patients on oxygen (Part 1). Initial data in COVID-19 patients were obtained in a randomized, open-label Phase 2 clinical trial of Auxora conducted in the United States in 26 patients with severe COVID-19 pneumonia and 4 patients with critical COVID-19 pneumonia. Patients treated with Auxora in addition to SOC recovered faster than those on SOC alone, with 67.8% (p<0.05) lower incidence of invasive mechanical ventilation or death during the study period, which was statistically significant. Based on these initial results and recommendation of the FDA, we transitioned from this open-label Part 1 of the trial to a randomized, blinded, placebo-controlled Part 2 of the trial (CARDEA). The results from Part 1 of the trial were published in July 2020 in the peer-reviewed journal Critical Care.

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Completed double-blind Phase 2 clinical trial in hospitalized COVID-19 pneumonia patients on oxygen (Part 2). In our CARDEA trial, a Phase 2 randomized double-blind placebo-controlled trial conducted in the United States in 284 patients with severe COVID-19 pneumonia (261 having moderate and severe respiratory failure—our efficacy set) and receiving supplemental oxygen but not on mechanical ventilation, treatment with Auxora resulted in a reduced time to recovery and a 56% relative reduction in mortality at 30 days (p=0.0165) and a 33% relative reduction in mortality at 60 days (p=0.1449) compared to placebo. Both of these findings are clinically relevant particularly in light of patients needing additional therapies on top of current standard of care. Time to recovery was seven days for Auxora-treated patients compared to ten days for patients receiving placebo (p=0.098). Data from this study was published in April 2022 in the peer-reviewed journal Critical Care.

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Completed the treatment portion of a Phase 2 biomarker clinical trial in mechanically ventilated COVID-19 pneumonia ARDS patients. In collaboration with investigators from Northwestern Memorial Hospital, we are conducting a Phase 2 dose escalation clinical trial of Auxora in the United States in patients with COVID-19 pneumonia who have ARDS and require invasive mechanical ventilation. We have explored dosing regimens with varying drug exposures in these patients in addition to the three-day regimen we tested in our open label Phase 2 clinical trial and CARDEA. We have completed the enrollment and treatment of patients in this trial and are completing the biomarker analysis from samples taken from these patients. We anticipate results from this trial will be published in 2024. While we have decided to not pursue further development of Auxora for patients with COVID-19 pneumonia, results from this trial may inform the design of a Phase 2 clinical trial for the treatment of AHRF and/or ARDS.

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Preclinical work in AHRF and ARDS. We believe that the observed treatment effect of Auxora in AP and COVID-19 pneumonia trials, both causes of respiratory failure and ARDS, merits further clinical development in a broader patient population with AHRF or ARDS from etiologies beyond COVID-19 pneumonia. We have tested zegocractin (active ingredient in Auxora) in a lipopolysaccharide (“LPS”)-induced respiratory failure model in mice that showed a reduction in both inflammatory cytokines in the lungs of these animals and peribronchiolar and perivascular edema.

Potential Additional Indications.

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Oral candidate (CM6336) for the treatment of chronic inflammatory and immunological diseases. We are also developing oral CRAC channel inhibitors for use in chronic inflammatory indications. We have selected CM6336 from our portfolio and are currently conducting IND-enabling preclinical testing on this compound. We have animal model data with other compounds suggesting CRAC channel inhibition may be useful in treating chronic pancreatitis, rheumatoid arthritis, ulcerative colitis and allergic asthma. We plan to submit INDs to the FDA in 2025 for CM6336 for the treatment of chronic pancreatitis and rheumatoid arthritis.

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Auxora for the treatment of acute ulcerative colitis. Recent animal data indicates that CRAC channel inhibition by zegocractin or CM4620 (active ingredient in Auxora) may be useful in the treatment of inflammatory bowel disease, such as ulcerative colitis. In a preclinical study performed with scientists from Charite – University Medicine, Berlin and New York University Grossman School of Medicine, it was shown that zegocractin, administered orally to mice every other day for a period of 30 days produced a significant reduction in intestinal inflammation in a model of ulcerative colitis. This work was published in EMBO Molecular Medicine in August 2022.

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Auxora for the treatment of allergic asthma. Zegocractin was studied in mouse models of asthmatic airway inflammation and influenza A virus infection to determine if inhibition of CRAC channels reduces asthmatic inflammation without interfering with the antiviral response. Researchers from New York University Grossman School of Medicine showed that oral administration of zegocractin significantly lowered both peribronchiolar inflammation and lung mucus production in the asthma model and did not impact viral response in the influenza A model. This work was published in Science Advances in October 2022.

Our Strategy

We are a company focused on the discovery and development of CRAC channel inhibitors. We intend to develop therapeutics to treat acute critical illnesses and chronic inflammatory and immunologic diseases including AP, AKI, ARDS or ARHF, and chronic pancreatitis. Our strategy to achieve this as follows:

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Leverage our proprietary CRAC channel inhibition science to develop drugs to treat acute critical illness and chronic inflammatory diseases where there are no effective therapies. Given that CRAC channels are found on many cell types in addition to immune cells, we believe that there will be a number of inflammatory and immunologic indications that can be targeted with the novel mechanism of action afforded by CRAC channel inhibitors. These indications can range from acute critical illnesses, the focus of our current efforts to date, to chronic inflammatory and immunologic conditions. Our portfolio of proprietary compounds with different pharmaceutical properties enables us to explore these indications with agents selected and formulated specifically for each unique clinical setting.

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Develop Auxora for the treatment of patients with AP and accompanying SIRS. AP represents an unmet need in critical care medicine as there are no disease-modifying therapies. We believe we have shown that Auxora-treated AP patients with SIRS and hypoxemia have better outcomes than SOC-treated control patients in a Phase 2a clinical trial. We are conducting a placebo-controlled, blinded Phase 2b clinical trial, CARPO, in a similar patient population exploring three dose levels of Auxora to confirm these findings, establish the recommended dose for a Phase 3 trial and define an endpoint acceptable to regulators. We anticipate topline results from this Phase 2b clinical trial in the second quarter of 2024 and, assuming positive results, to initiate a Phase 3 trial in 2025.

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Demonstrate the efficacy of Auxora for the treatment of AKI. AKI represents a significant unmet medical need as there are no disease- modifying therapies to either prevent or treat AKI. We have a body of clinical observations and pre-clinical data that support the development of Auxora in this acute critical disease. In February 2024, we received clearance from the FDA of our IND for a Phase 2 clinical trial of Auxora for the treatment of AKI patients with AHRF which we call KOURAGE and which we plan to initiate in the second quarter 2024 with data expected in 2025.

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Develop Auxora for the treatment AIPT. CRSPA, an open-label 24-patient Phase 1/2 clinical trial, is currently being conducted in pediatric patients with AIPT. The first cohort of nine patients in this trial has been completed and the results from this cohort as well as results from a blinded matched historical control group were presented at ASH 2023. While

initially a single-center trial, CRSPA has now been expanded to additional sites and our collaborators expect to have data in 2025.

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Demonstrate the efficacy of Auxora for the treatment of patients with AHRF and ARDS caused by multiple etiologies. We have completed CARDEA, a Phase 2 randomized double-blind, placebo-controlled trial in patients with severe COVID-19 pneumonia and receiving supplemental oxygen, but not on mechanical ventilation, and with our collaborator we have completed the enrollment and treatment of patients of a Phase 2 clinical trial in mechanically ventilated COVID-19 pneumonia ARDS patients. Results from this trial may inform the design of a Phase 2 clinical trial for the treatment of AHRF and/or ARDS and are evaluating next steps for potential clinical development of Auxora in patients with AHRF and ARDS.

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Advance a second CRAC channel inhibitor into clinical development for the treatment of an additional inflammatory indication. We believe that there are multiple indications, including some chronic inflammatory and immunologic indications, that could potentially be treated with CRAC channel inhibitors from our portfolio of compounds, including orally available compounds. In a preclinical animal model of chronic pancreatitis, we observed robust beneficial effects of one of our CRAC channel inhibitors. We are currently conducting IND-enabling preclinical testing on CM6336 from our drug portfolio, which is a candidate for use in chronic inflammatory and immunologic diseases. We plan to submit an IND to the FDA for CM6336 in 2025, for the treatment of chronic pancreatitis and rheumatoid arthritis.

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Explore additional indications for Auxora. Recent pre-clinical work in both acute ulcerative colitis and allergic asthma have shown that the zegocractin, the active molecule in Auxora, reduces inflammation and symptoms of these diseases in animal models.

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Pursue licensing and partnership opportunities for Auxora and other compounds in our portfolio. Development of Auxora in different geographies, and commercialization of Auxora in acute critical care indications that will require access to hospital emergency rooms, may benefit from partners with existing development capability and/or commercial channels and sales forces. We are exploring these types of relationships. In addition, we may elect to partner other of our compounds for specific indications.

Our Team

Our executive team is led by A. Rachel Leheny, Ph.D., our chief executive officer, who has more than 30 years of experience in the life sciences industry as a scientist, venture capital investor and investment banking research analyst. Kenneth Stauderman, Ph.D., a co-founder and our chief scientific officer with more than 30 years of experience in drug discovery and development, is a leading expert in CRAC channels and led the discovery of some of the foundational work in this field. Sudarshan Hebbar, M.D., our chief medical officer, has more than 15 years of clinical development and product development experience and was previously a practicing nephrologist and critical care physician. Raven Jaeger, MS, our chief regulatory officer, who has over 20 years of regulatory affairs experience with several marketing approvals in serious diseases with high-unmet medical need.

Our Science

Essential Roles of Calcium Signaling

Calcium serves as an essential messenger for intracellular signals and plays diverse and important roles in biological systems. The major storehouse for calcium in a cell is a compartment called the endoplasmic reticulum (“ER”). Calcium is found there at average concentrations that are 1,000 to 5,000-fold higher than in a cell’s interior or cytoplasm. When an outside signal stimulates a cell in a particular way, the stored calcium is rapidly and periodically released from the ER into the cell interior, resulting in activation of a number of key cellular processes affecting synthesis and release of other signaling molecules, cell growth, differentiation and division. These processes include, for example, gene transcription and protein kinase signaling. In response to sufficient external stress on the cell, release of calcium from these intracellular stores can trigger cell death.

CRAC Channels

A specific set of calcium-transporting ion channels known as CRAC channels are responsible, among other things, for replenishing the calcium stores in the ER. The two principal proteins that comprise CRAC channels are the ER calcium-sensing protein Stomal Interaction Molecule 1 (“STIM1”) and the cellular membrane calcium channel protein Orai1. When cells are stimulated in particular physiological ways, intracellular messengers are generated that cause the periodic release of calcium from the ER. The release of calcium from the ER is then sensed by STIM1, which unfolds and activates, or opens, the Orai1 calcium channel triggering an influx of calcium into the cell. In certain pathological conditions, however, CRAC channels can be activated in non-physiological ways, such as by a toxin that can cause excessive release of calcium from the ER, leading to overactivation of CRAC channels.

Depending upon the extent of activation and the cell or tissue involved, calcium influx through CRAC channels can regulate calcium-dependent inflammatory pathways or can activate cell injury pathways. For example, in immune cells like T lymphocytes, activation of CRAC channels plays a key role in initiating the adaptive immune response and the generation of inflammatory cytokines. In certain acute critical illnesses such as AP, CRAC channels on affected organ tissue cells can become overactivated, resulting in excess calcium entry that is toxic to cells, causing cellular injury or death that can exacerbate an accompanying inflammatory response.

CRAC channels serve to replenish calcium levels in the ER and to provide calcium for cellular signaling events.

There is strong evidence linking STIM1 and Orai1 to the way the cell replenishes its calcium stores and to the physiological consequences of disrupting these proteins from both in vitro and in vivo models, including animal gene knock-out or knock-in models, and human genetics. This linkage is true at both the cellular and phenotypic levels. At the cellular level, manipulating STIM1 or Orai1 activity by genetic inactivation or enhancement has been shown to impact calcium transport. Inactivating STIM1 or Orai1 was shown to decrease calcium entry into cells, whereas creating mutations in STIM1 or Orai1 that enhance their activity was shown to increase calcium influx. At the phenotypic level, people with homozygous genetic deficiencies in the genes encoding Orai1 or STIM1 develop the life-threatening condition of severe combined immunodeficiency. Because these individuals lack the ability to mount an effective immune response, they suffer from an extreme risk of contracting life-threatening infections. People with a heterozygous genotype for the mutated genes encoding Orai1 or STIM1 do not have any notable conditions resulting from or associated with these genetic deficiencies despite a partial reduction in the functional activity of the Orai1 or STIM1 proteins.

In lymphocytes, CRAC channels are critically responsible for controlling the entry of calcium that subsequently initiates calcium-dependent events. Within minutes of activating CRAC channels, alterations in intracellular calcium levels result in both (a) the inhibition of lymphocyte migration and (b) the activation of immune cell activity. Both of these elements of CRAC channel biology are central to identifying potential therapies. Effects of prolonged calcium signaling supported by both calcium release from the ER and CRAC channel-mediated calcium entry include stimulation of cell proliferation; expression of immune-activated genes; production of cytokines and chemokines; and lymphocyte differentiation. These longer-duration effects, too, are central to the backdrop for therapeutic intervention. For example, genes triggered by calcium release and subsequent calcium entry through CRAC channels include many activators of inflammation. This mechanism involves various signaling proteins, including two in particular, calcineurin and a transcription factor called nuclear factor of activated T cells (“NFAT”), which form a critical link between calcium elevations and transcriptional activation. Calcineurin is a calcium- activated enzyme that removes inhibitory components from NFAT, triggering it to enter the nucleus and function as a transcription factor. Calcineurin has a well-validated immunoregulatory role; it is the target of two broadly prescribed immunosuppressive molecules, cyclosporine and tacrolimus. NFAT is expressed in a wide spectrum of immune cells and its activity drives inflammation via the production of many pro-inflammatory cytokines such as interleukin-6 (“IL-6”); tumor necrosis factor alpha (“TNFμ”); and interleukin-2 (“IL-2”).

Increased levels of intracellular calcium mediated by CRAC channels activate a number of inflammatory pathways.

Inflammatory diseases including AP, respiratory failure, kidney injury or traumatic brain injury are associated with activation or overactivation of CRAC channels. Preclinical experiments have shown that inhibition of CRAC channels has the potential to provide therapeutic benefit in these and other diseases. Multiple compounds have been identified in scientific literature that inhibit CRAC channels, but few of these have advanced to clinical trials as a result of unsuitable pharmaceutical properties required for potential therapeutic use.

Advantages to Our Approach

We believe CRAC channels are promising drug targets as they are present on critical organ tissues (such as endothelium cells) and on immune system cells (such as T cells). Overactivation of these channels can lead to organ damage and cytokine-mediated pro-inflammatory processes. CRAC channel activation plays a critical role in endothelial damage and serves as the proximal step in T cell production of pro-inflammatory cytokines. We believe the key advantages of CRAC channel inhibition science are:

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Our CRAC channel inhibitors provide a dual mechanism to reduce cellular damage by both blocking direct tissue damage and down-regulating inflammation.

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Our CRAC channel inhibitors act upstream of several approved drugs (such as cyclosporin) affecting multiple pro-inflammatory pathways. This translates into down-regulation of multiple cytokines produced by the immune system in a disease state and may provide broader acting anti-inflammatory action compared to drugs that target a single cytokine.

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Our CRAC channel inhibitors are small molecule drugs that provide rapid onset of immunomodulatory action as well as rapid offset which can provide rapid recovery of immunocompetence.

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We believe that there may be underlying biological pathways common to a number of acute critical illnesses, including those indications we are pursuing, so that there could be the potential for a single agent to treat patients sharing this underlying biology regardless of disease.

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Our proprietary IV lipid nanoemulsion used in Auxora enhances the delivery of our drug to lipophilic organ tissues such as the pancreas, lung and kidney.

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Certain of our proprietary CRAC channel inhibitors, including CM6336, are orally bioavailable and can be used to treat chronic inflammatory and immunologic conditions.

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Our approach is applicable to both acute and chronic inflammatory and immunologic diseases.

Auxora, a Selective CRAC Channel Inhibitor

We are developing Auxora, a proprietary IV-formulated CRAC channel inhibitor, for several indications, including the treatment of severe AP, AIPT, AKI, severe acute respiratory diseases including AHRF, and ARDS, and other acute inflammatory diseases associated with dysregulation of intracellular calcium in organ tissues. We hold worldwide rights to the active ingredient in Auxora, zegocractin, which was previously referred to as CM4620. Auxora inhibits the transport of calcium into cells by inhibiting the Orai1 CRAC channel. Testing of Auxora in an in vitro selectivity panel screen showed that the compound was highly selective over many other ion channels, receptors or transporters, which is consistent with the lack of sequence or structural similarity of CRAC channels with other channels.

Auxora is specifically formulated as an IV lipid nanoemulsion that is designed to facilitate the rapid delivery to lipophilic organ tissues such as the pancreas, lung and kidney, which we believe makes it a promising product candidate for the treatment of acute critical illnesses. The nanoemulsion is composed of nanometer-sized lipid droplets suspended in water. Auxora dissolves into the lipid particles that, once infused, move quickly through the body and are absorbed by lipophilic tissues that are hard-to-reach for aqueous solutions and hydrophilic drugs. We believe it is critically important to block CRAC channel activity as soon as possible in these acute indications to prevent further tissue damage and decrease morbidity or mortality. Auxora was well-tolerated in single dose and multiple dose Phase 1 clinical trials in healthy adults, and in both the Phase 2 COVID-19 clinical trials and the Phase 2a AP clinical trials.

Preclinical Evidence for Anti-Inflammatory Activity of Zegocractin, the Active Ingredient in Auxora

In vitro treatment of activated human peripheral blood mononuclear cells (“PBMCs”), which are predominantly lymphocytes, with zegocractin (the active compound in Auxora) resulted in a concentration-dependent inhibition of the release of a number of pro-inflammatory cytokines including IL-2 and interleukin-17 (“IL-17”) when measured at 48 hours. The breadth of the spectrum of cytokines inhibited by zegocractin is consistent with the central role of calcium signaling in the inflammatory response.

Zegocractin inhibited the release of a number of cytokines from activated human PBMCs.

The role of calcium and CRAC channels in inflammation extends beyond lymphocytes and other immune cells. Excess calcium in cells in tissues such as kidney, pancreas, lung and the nervous system leads to cell damage or activation of cell death pathways causing tissue damage and organ failure. These processes, in turn, trigger inflammatory immune responses that further exacerbate cell damage and cell death and can accelerate tissue damage and organ failure.

CRAC channel overactivation causes cell damage, leading to cell death and triggering an inflammatory immune response.

Pharmacodynamic Profile of Auxora

Auxora is a proprietary lipid nanoemulsion IV formulation of the small molecule zegocractin that is administered by IV infusion. To test the activity of Auxora, we have developed an assay using ex vivo blood samples in which we stimulate IL-2 release as a surrogate pharmacodynamic (“PD”) marker for immune system activity. After administration, Auxora rapidly redistributes from the blood into lipophilic tissues and is predominantly cleared through the biliary system. Thereafter, the remaining drug is gradually cleared from lipophilic tissues over the course of a few months resulting in trace plasma levels without biological or clinical activity reported to date. Additional toxicity studies will be performed during Phase 3 development and may further address the safety of Auxora as it is cleared from the body. Auxora has demonstrated a rapid onset of immunomodulatory action within 30 minutes post-dosing in this assay performed on blood samples from patients with AP and treated with Auxora. Recovery of IL-2 release was observed within 24-48 hours following dosing completion, indicating offset of immunomodulation.

Auxora has a rapid on-off effect as demonstrated by the onset of immunomodulation after dosing and the recovery of the immune system after the drug infusion is stopped.

We believe that the timely termination of drug action is an important feature of Auxora as it may limit the potential for long-term immunosuppressive effects of prolonged CRAC channel inhibition, which have not been seen in clinical trials to date. In a rat model, administration of Auxora led to high levels of drug exposure in kidneys, pancreas, lung and plasma at two hours and four hours after the start of a four-hour infusion. By eight hours, drug levels dropped, consistent with rapid drug redistribution and/or clearance.

Auxora led to rapid increase in drug levels in the pancreas, lung, kidney and plasma after administration to rats.

Potency and Selectivity of Auxora

Zegocractin (the active molecule in Auxora) is among the most potent CRAC channel inhibitors reported in scientific literature, as observed in published experiments performed in our labs, including experiments published in the journal Cell Calcium. The data in the figure below illustrate that Auxora potently inhibits Orai1-containing CRAC channels, as 50% of the activity of the channel can be inhibited with nanomolar (“nM”) concentrations of compound. Further, the compound is selective compared to other channels. For

example, on two channels important in cardiac (heart) function, even micromolar (“μM”) quantities of zegocractin do not achieve measurable inhibition of the activity of those channels. All compounds in our portfolio of potential drug candidates have properties similar to those indicated in the table below.

Channel Effect of Zegocractin Orai1 CRAC Channel Selectivity Ratio

Human Orai1-containing CRAC channels IC50 = 119 nM –

Human voltage-gated Ca channels (cardiac) <10% inhibition at 10 μM >100-fold

Human hERG K channels (cardiac) <10% inhibition at 10 μM >100-fold

IC50 = concentration producing 50% inhibition of channel activity. Activity of each channel was assessed by electrophysiological (electrical) measurements of either calcium ion (Ca2+) or potassium ion (K+) flow through the indicated channel. The maximum soluble concentration of compound (10 μM) was tested on the cardiac channels.

(1)

Assay performed by us in 2011-2012.

(2)

Assay performed by a contracted vendor in 2012.

P-Values and Confidence Intervals

The conventional method for measuring the statistical significance of a result is known as the “p-value,” which represents the probability of obtaining results at least as extreme as those that were observed in the study presuming that the null hypothesis of no effect is true. Generally, a p-value less than 0.05 is considered statistically significant and may be supportive of a finding of efficacy by regulatory authorities. However, regulatory authorities, including the FDA, do not rely on strict statistical significance thresholds as criteria for marketing approval and maintain the flexibility to evaluate the overall risks and benefits of a treatment. A confidence interval (“CI”) is a range of values within which the true value has a specified probability to exist. It is conventional to set the confidence interval at 95%, which means 95 of 100 times, the confidence interval will contain the true value. If the confidence interval does not contain the value of zero (the null value), it can be assumed that there is a statistically significant effect.

Auxora for the Treatment of AP

We have conducted a Phase 2a clinical trial of Auxora in AP patients with SIRS along with hypoxemia predicted to have moderate or severe AP. Because of the complications of SIRS and hypoxemia, these patients were at high risk for developing severe AP and life-threatening organ failure, particularly respiratory failure. In this trial Auxora treatment was associated with reduced local and systemic inflammation, improved ability to tolerate solid food, and shorter hospital stays. We are now conducting CARPO, a Phase 2b double blind placebo-controlled clinical trial of Auxora in 216 patients with predicted moderate or severe AP, and expect topline data expected in the second quarter of 2024. We have received Fast Track designation from the FDA and orphan drug designation in the EU from the EMA for Auxora for the treatment of AP. However, there is no guarantee that Fast Track designation will result in a faster regulatory review or regulatory approval.

Treatment with Auxora could offer significant benefits to AP patients and prevent disease progression

Acute Pancreatitis Background

Acute pancreatitis is an acute inflammatory process of the pancreas that presents as severe upper abdominal pain, often accompanied by nausea and vomiting. During episodes of the disease, inflammation of the pancreas occurs, which can lead to pancreatic cell death or necrosis and systemic inflammation. Normal pancreatic functions, such as the secretion of digestive enzymes required to break down

carbohydrates and fats, are disabled. There are no approved therapies for AP but most cases are mild and resolve after several days of supportive care, including avoiding oral feeding in the short term to not further aggravate the pancreas. Most patients are hospitalized and require IV fluids and monitoring for development of more severe symptoms.

Severe complications arise because of the acute inflammatory response that takes place in the pancreas. These complications can lead to SIRS, in which the function of other tissues or organs, including the lung may be compromised. Approximately one third of patients with severe AP develop acute lung injury or ARDS. Lung failure accounts for approximately 60% of deaths associated with AP in developed countries.

There are an estimated 275,000 hospitalizations for AP annually in the United States. Mortality in mild AP is less than 1% but climbs to 20-30% in patients with persistent, severe disease. Approximately 40% of hospitalized AP patients present with SIRS and are predicted to have moderate or severe disease, with 15% actually developing severe AP. The target population for Auxora in our ongoing Phase 2b clinical trial is AP patients with accompanying SIRS, which we estimate to be approximately 100,000 patients per year in the United States alone.

SIRS: Systemic Inflammatory Response Syndrome

Target patients for Auxora in AP are a subpopulation of total number of AP hospitalizations and are selected primarily based on the presence of SIRS.

Leading causes of AP are gall stones and resulting elevated levels of bile salts, and alcohol metabolites, together accounting for 60-80% of all cases depending on the specific population examined. Other causes include: hypertriglyceridemia, familial (genetic) types, hypercalcemia, abdominal injury or trauma (including endoscopic retrograde cholangiopancreatography), cancer, drug-induced, or

autoimmune, each making up smaller slices of the total AP population. These different causes all appear to lead to a common mechanism in which calcium within pancreatic cells drives pathology.

Inhibition of CRAC channels has the potential to impact multiple pathologies associated with AP.

Excessive signaling through calcium-dependent pathways has been linked to multiple pathologies associated with AP. A primary function of the pancreas is to produce enzymes that are required to digest food. The secretion of these enzymes from the pancreas is dependent on the periodic release of calcium from internal stores in cells called the pancreatic acinar cells. In AP, aberrant activation of these cells results in elevated, toxic levels of intracellular calcium and, as a consequence, the inappropriate activation of digestive enzymes inside the cells causes the acinar cells to self-digest.

Acute pancreatitis is also associated with a high level of inflammation. In some patients, the release of inflammatory cytokines and the triggering of SIRS can lead to life-threatening distal organ failure. Previous studies have established a strong link between calcium signaling and the release of inflammatory cytokines. The most frequent systemic complications in severe cases of AP are respiratory dysfunctions ranging from hypoxemia to ARDS. As in the case with ARDS from other underlying causes, AP-associated ARDS is the result of both increased vascular permeability and an increase in inflammation, which we believe are CRAC channel-dependent processes.

Acute Pancreatitis Phase 2a Clinical Trial Results

We completed a Phase 2a clinical trial of Auxora in 21 patients with AP with predicted severe or moderately severe disease as determined by the presence of SIRS and hypoxemia. Patients were enrolled in two cohorts. Fourteen patients received Auxora plus SOC and seven received SOC only. The Auxora- treated patients received a daily IV dose of Auxora for up to four days. As an early-stage proof of concept trial, this trial was not powered for statistical significance for any of the endpoints.

Trial design for Auxora AP Phase 2a clinical trial.

The primary symptom associated with AP is severe upper abdominal pain. Patients with AP are unable to tolerate any solid food without an increase in pain or the occurrence of nausea or vomiting until the pancreatitis resolves. In this clinical trial, only one patient in the Auxora-treated group and one patient in the SOC group were tolerating solid food at study entry. After 72 hours, seven of 14 Auxora patients were tolerating solid food while only one of seven SOC patients was tolerating solid food. At the time of hospital discharge, 13 of 14 Auxora patients could tolerate solid food compared to three of seven SOC patients.

Acute pancreatitis patients treated with Auxora were able to tolerate food sooner than matched controls.

Patients treated with Auxora were discharged from the hospital after a median of 3.7 days compared to SOC patients, who had a median stay of 6.0 days. Of the 21 patients enrolled in this trial, five had respiratory failure at the time of enrollment, four in the Auxora-treated group and one in the SOC group. Of the four Auxora- treated patients, only one required intubation and mechanical ventilation after several days as a result of a procedural complication. This patient ultimately died of complications from respiratory failure, whereas the only SOC patient who enrolled with respiratory failure required immediate intubation and mechanical ventilation. This SOC patient was on a ventilator for more than 90 days before dying.

An objective measure of the severity of AP is the computed tomography severity index (“CTSI”) that is based on findings from a CT scan with IV contrast to assess radiographic severity of the disease. CTSI scores have been found to correlate with clinical indices of severity. CT scans were obtained from all the patients in this clinical trial both at study entry and at hospital discharge or five days, whichever was earlier, and sent to a blinded central reader to determine the CTSI score. Twelve of the patients, eight in the Auxora-treated group and four in the SOC group, were found to have elevated CTSI scores at the time of randomization that were consistent with moderate to severe AP. Three of the eight Auxora-treated patients with elevated CTSI scores saw improvement over the course of their hospital stay while none of the four SOC patients experienced improvement.

Persistent SIRS, defined as SIRS lasting more than 48 hours, is an indication of continued activation of inflammatory pathways in patients with AP. Furthermore, persistent SIRS is highly predictive for the development of organ failure in AP. All patients in this AP trial had SIRS at enrollment. Only five of the 14 patients treated with Auxora had persistent SIRS, while five of the seven patients treated with SOC alone had persistent SIRS.

Auxora treatment was associated with improvements in multiple clinically relevant parameters.

The potential impact of Auxora treatment on the inflammatory response is illustrated by one patient in the Auxora-treated arm who was admitted to the hospital with respiratory failure and an extremely high level of IL-6, a pro-inflammatory cytokine, of greater than 7296 pg/ml, a level approximately 450-fold higher than the upper level of normal range. Historically, levels of greater than 122 pg/ml are predictive of organ failure in AP and levels above 80 pg/ml are associated with a 22-fold increased risk of respiratory failure in COVID-19 patients. At 120 hours, and after four doses of Auxora, the level of IL-6 in this patient was reduced to 66 pg/ml. This patient did not require intubation and was discharged on room air, not supplemental oxygen, on the eighth day.

A rapid reduction in IL-6 levels was observed in a patient treated with Auxora.

Auxora was generally well-tolerated in the trial. Treatment-emergent adverse events (“TEAEs”) were reported in 12 (86%) patients receiving Auxora and four (43%) patients receiving SOC alone. The majority of adverse events (“AEs”) in patients treated with Auxora were mild and considered resolved or resolving at the end of the trial. Severe TEAEs occurred in two patients (14%) receiving Auxora and two patients (29%) receiving SOC alone. Three patients (21%) treated with Auxora and two patients (29%) treated with SOC alone developed serious adverse events (“SAEs”). One death occurred in the Auxora treatment arm which was attributed to abdominal compartment syndrome and multi-organ failure. None of the AEs were deemed to be Auxora-related by the principal investigators. A summary of AEs reported in two or more patients receiving Auxora is listed below.

Summary of Adverse Events Reported by Two or More Patients Receiving Auxora.

The following SAEs occurred in patients treated with Auxora: death, non-infective cystitis, acute pancreatitis, sepsis, ARDS, hypoxic-ischemic encephalopathy (a type of brain dysfunction), pneumonia, respiratory failure and pulseless electrical activity. None of the SAEs were deemed to be Auxora-related by the principal investigators.

CARPO: Ongoing Phase 2b Clinical Trial in AP

In March 2021, we initiated CARPO, a randomized, double-blind placebo-controlled Phase 2b clinical trial in patients with AP and accompanying SIRS. This is a randomized, double-blind, placebo-controlled trial examining three dose levels of Auxora versus placebo. The clinical trial includes 54 patients in each of the four cohorts. Doses for two cohorts are essentially the same as doses patients received in the open-label Phase 2a clinical trial. A third cohort is receiving half the middle dose level. The fourth cohort will receive matched volumes of placebo. This dose ranging is intended to establish a dose-response in the AP setting. Endpoints include measures of safety, patient benefit and outcome improvement with a primary endpoint of food tolerance and responder analysis. Advisers suggest that food tolerance is the best measure of clinical efficacy, and, in addition to being the primary endpoint, food tolerance will be validated through a responders’ analysis. We anticipate topline results from this clinical trial in the second quarter of 2024 and, assuming positive results, to initiate our Phase 3 trial in 2025.

Trial design for CARPO, Phase 2b clinical trial in AP.

CRSPA: Ongoing Open-Label Phase 1/2 Clinical Trial in AIPT (Pancreatitis as a Side Effect of Pediatric ALL Treatment)

CRSPA is a 24-patient open-label Phase 1/2 investigator-sponsored clinical trial being conducted by SJCRH and exploring Auxora as a potential therapy in pediatric patients that develop AIPT as a result of treatment for their underlying ALL. Current therapies for ALL result in long term survival for over 90% of pediatric ALL patients. One of the mainstays of therapy in these patients is asparaginase (e.g., ONCASPARTM and RYLAYZETM), an enzyme that degrades the amino acid asparagine, which is essential for the leukemic cells to survive. However, the administration of asparaginase triggers the development of pancreatitis or AIPT in 7-10% of patients of the over 3,000 pediatric ALL patients treated per year in the US, with similar numbers in Europe. AIPT is a severe complication characterized by intense abdominal pain, nausea, vomiting and SIRS. AIPT can lead to further chronic problems such as insulin

dependence, exocrine pancreatic insufficiency and chronic pain. Many of these children can no longer be treated with asparaginase which can have a negative impact on their recovery from ALL. It has been shown that over 50% of patients with AIPT develop pseudocysts or pancreatic necrosis. There is currently no disease modifying treatment for AIPT and standard of care only addresses the symptoms of the disease.

In CRSPA, pediatric patients suffering from AIPT are enrolled and treated with four daily doses of Auxora with the primary endpoints of safety, tolerability and the reduction in development of complications of AIPT, including necrotizing pancreatitis and SIRS. Investigators at SJCRH presented results from the first cohort of the CRSPA study at the ASH meeting in December 2023. This cohort of patients consists of nine children (average age 8.2 years) with ALLwho have developed AIPT (referred to as AAP in the abstract). Eight of nine patients in the CRSPA study received a full regimen of four daily doses of Auxora at dose level 1 (30mg/m2 on day one and 42mg/m2on days two through four) administered as a four-hour infusion. Results from these patients were compared to a matched historical control group of 16 patients out of a total of 51 patients who developed AIPT within 30 days of receiving asparaginase in the Total Therapy XVI study (T16) being conducted at SJCRH.The comparison showed that Auxora reduced the average number of days patients spent in the hospital from 13.4 to 6.3 days. The need for ICU care was also reduced, with three control patients (18.8%) requiring ICU care compared to one treated patient (12.5%), and the average number of days in the ICU was reduced from five to three days. Additionally, no patients in the CRSPA study required TPN, compared to 68.8% in the historical matched control group, who required 27 days of nutritional support on average. Finally, blinded central reading of pancreatic imaging showed a reduction in the development of significant pancreatic necrosis (≥30%) and the severity of acute pancreatitis by computed tomography severity index (“CTSI”) scoring in patients treated with Auxoracompared to the matched historical cohort. Based on these results, investigators have established the dose level used in this cohort as the recommended Phase 2 dose (RP2D) of Auxora for children with ALL experiencing AIPT and will continue to enroll an additional 15 patients at this dose level to reach full enrollment at 24 patients. CRSPA has been expanded to additional sites and we expect our collaborators to have data in 2025.

Total 16 (T16): All AIPT Matched T16 AIPT cohort CRSPA evaluable for efficacy

Patients with AIPT 51 16 8

ICU days mean (range) 5.1 (1-9) 5 (3-7) 3

≥30% pancreatic necrosis (%) NA 4 (26.7%) * 0

*One patient in matched T16 cohort was unable to be evaluated for pancreatic necrosis or a CTSI score

CTSI score definitions:

0-3 mild acute pancreatitis

4-6 moderately severe acute pancreatitis

≥7 severe acute pancreatitis

According to clinical data published by Mauney, et. al., in the Journal of Pediatric Gastroenterology and Nutrition in March 2022, patients who developed AIPT had a median length of stay in the hospital of ten days consistent with that seen in the T16 database which is greater than the six day median length of stay for patients treated with Auxora, reflecting a faster resolution of symptoms.

Preclinical Studies with Auxora in AP

Treatment with Auxora led to a decrease in inflammatory markers in both the pancreas and the lung in a cerulein-induced rat model of AP. In this AP model, rats were given four hourly intraperitoneal injections of cerulein to induce pancreatitis and Auxora was given in a therapeutic mode by a four-hour intravenous infusion, starting 30 minutes after the first cerulein injection. Animals were examined 30 minutes after the end of infusion. Cerulein overstimulates pancreatic acinar cells, causing overactivation of CRAC channels, premature activation of digestive enzymes, mitochondrial dysfunction and death of the acinar cells, as well as enhanced accumulation of cytokines. Auxora administered post-insult decreased the acinar cell damage (50% as measured by histopathology) and decreased mRNA transcript levels (measured by quantitative real-time polymerase chain reaction) of myeloperoxidase (MPO) (80-90%) a biomarker of neutrophil activation, and the inflammatory cytokines TNFα (80-90%), and IL-6 (80-90%) in the pancreas. Similar to AP in patients, inflammatory

signals in the cerulein model are also observed in the lungs. The anti-inflammatory effects of Auxora in the pancreas were mirrored in lung tissue.

Auxora inhibited the expression of MPO, TNFα and IL-6 in the cerulein-induced acute pancreatitis model in both the pancreas and lung. These results have been published in The Journal of Physiology.

Consistent with the data described above, treatment with the active ingredient in Auxora, zegocractin, decreased pancreatic damage in two other models of AP in mice, gallstone and alcohol models. AP in a gallstone model was elicited by retrograde pancreatic ductal injection of a bile acid and in the alcohol model by intraperitoneal injections of a fatty acid and ethanol. Both bile acids and fatty acids + ethanol induce AP by overactivation of CRAC channels. Zegocractin was given by intraperitoneal injection in a therapeutic mode at one and 13 hours after disease induction and animals were examined 24 hours after disease induction. Under these conditions, zegocractin decreased the amount of inflammation, edema and acinar cell damage (each close to 50% as measured by histopathology; see the figure below).

Zegocractin decreases pancreatic damage in two models of AP in mice. Shown are histology photomicrographs of the pancreas. The top panels are examples from control animals in both the gallstone (left) and alcohol (right) models showing the presence of inflammatory cells (small dark dots), edema (white areas) and acinar cell necrosis (light red). Bottom panels are from animals treated with Zegocractin, showing reduced inflammation, edema and necrosis. White bars = 50 m.

The ability of the pancreas to secrete digestive enzymes, fluid and bicarbonate is critical for the ability to digest food. Various toxins, including an alcohol metabolite, fatty acid ethyl ester, or bile acids can cause the premature activation of these digestive enzymes within the pancreas, leading to self-digestion and pancreatic cell death. One of the primary treatments for AP has been to completely stop all orally administered food for several days. A sign of the resolution of a case of AP is the ability to tolerate food, requiring functioning pancreatic ductal cells and appropriate secretion of digestive enzymes, fluid and bicarbonate. Thus, restoration of pancreatic ductal cell secretion is thought to be a critical element in the treatment of AP.

CRAC channel inhibition preserved pancreatic ductal fluid secretion in the cerulein-induced AP model in mice as well as in gallstone and alcohol models of AP. The mouse cerulein-induced AP model was performed like the rat model described above, except that seven hourly injections of cerulein were used and animals were examined 12 hours after the first cerulein injection. AP in the gallstone model was elicited by retrograde pancreatic ductal injection of a bile acid and in the alcohol model by intraperitoneal injections of a fatty acid and ethanol. Pancreatic fluid secretion was measured by collection of pancreatic juice from the pancreatic duct over a 30 minute period. In all three models, CM5480, a preclinical CRAC channel inhibitor model compound, given by intraperitoneal injection after disease onset was able to preserve pancreatic ductal fluid flow, suggesting that CRAC channel inhibition may have a direct protective effect on ductal cells that could help resolve AP.

CM5480 (CM-C) treatment led to the preservation of pancreatic ductal secretion in a cerulein-induced acute pancreatitis model.

Auxora for the Treatment of Acute Kidney Injury

There are recent examples in the scientific literature where CRAC channel inhibition was shown to reduce damage in animal models of AKI. We have conducted preclinical studies of Auxora in a rat model of AKI. Additionally, we have observed in our clinical trials that Auxora-treated patients appear to have less complications of kidney injury or failure in the setting of acute critical illness. In February 2024, we received clearance from the FDA of our IND for a Phase 2 clinical trial of Auxora for the treatment of AKI patients with AHRF which we call KOURAGE and which we plan to initiate in the second quarter of 2024 with data expected in 2025.

Acute Kidney Injury Background

AKI is marked by three distinct phases, the initial injury, the recovery from that injury and then the long-term damage resulting from the initial injury. Patients who do not recover completely from the initial injury are at risk for long-term damage. We believe the administration of Auxora to patients with more severe AKI will result in a greater proportion of patients recovering completely from the initial injury, and in so doing, will lessen the long term complications of the initial injury. This is illustrated in the figure below. AKI is classified as Stage 1, Stage 2 and Stage 3 depending on the seriousness of the disease as measured by serum creatinine and urine output and may progress from one stage to the next as a patient’s condition worsens. Stage 1 patients have an increase in serum creatinine of ≥ 0.3 mg/dL or 1.5 to 1.9 times baseline or urine output of <0.5 mL/kg/hour for six to 12 hours. Stage 2 patients have an increase in serum creatinine to 2.0 to 2.9 times baseline or urine output of <0.5 mL/kg/hour for 12 to 24 hours. Stage 3 patients have an increase in serum creatinine to ≥ 3.0 times baseline, an increase in serum creatinine of ≥ 0.3 mg/dL to ≥ 4.0 mg/dL, urine output of <0.3 mL/kg/ hour for ≥ 24 hours, anuria for ≥ 12 hours or initiation of kidney replacement therapy.

Time course of acute kidney injury and progression to chronic kidney disease.

AKI is caused by a number of factors including infection, trauma and myocardial infarction. According to the Healthcare Cost and Utilization project, there are more than 3.7 million patients hospitalized each year who have AKI in the US. Of these, 71% have Stage 1, 17% have Stage 2 and 12% have Stage 3 so that Stage 2 and Stage 3patients represent an incidence of over 1 million per year in the US alone. Additionally, over half of the Stage 2 and Stage 3 patients will have some form of respiratory failure and in these patients the expected mortality while hospitalized and up to 90 days post discharge is 50% or more. Currently there are no drugs that directly treat AKI and standard of care includes fluids, diuretics, nutritional support, and correction of the underlying cause of the AKI. Patients who suffer AKI may over the course of months develop chronic kidney disease and may go into end-stage renal failure. The goal of treatment would include reducing the need for dialysis, kidney transplantation, long-term illness and death.

Early treatment with Auxora could offer significant benefits to AKI patients and prevent disease progression.

KOURAGE: Randomized, double-blind placebo-controlled Phase 2 clinical trial in severe AKI

KOURAGE is a randomized, double-blind, placebo-controlled study that will evaluate 150 patients with Stage 2 and 3 AKI who have AHRF and are receiving oxygen by non-invasive mechanical ventilation, high flow nasal cannula or IMV. Patients will be stratified by classification of stage of AKI as well as the use of IMV. Patients will receive either a four-hour infusion of Auxora or placebo at 1.25 mL/kg as a first dose, after which they will receive Auxora or placebo at 1.0 mL/kg at hours 24, 48, 72 and 96. The primary endpoint of the trial will be evaluation of patients through day 30 to determine days alive, ventilator-free and dialysis-free. Secondary endpoints will include a composite of all-cause mortality, decrease in eGFR, and the incidence of dialysis over a period of 90 days, also known as MAKE-90. We anticipate enrolling the first patient in KOURAGE in the second quarter of 2024 with data available in 2025.

Clinical Observations supporting the potential use of Auxora in AKI

While the purpose of CARDEA was to test Auxora in severe COVID-19 pneumonia patients, AKI was reported in a number of patients as it is a common sequalae of this disease. We observed ~40% reduction in the frequency of reported AKI in patients treated with Auxora compared with placebo patients. In addition, in a post-hoc analysis of patients with compromised kidney function (eGFR< 60 mL/min/1.73 m2) at enrollment, there was a survival benefit for patients treated with Auxora compared to those on placebo. Biomarker analysis from blood samples taken from over 190 CARDEA patients further showed that Auxora had a positive impact on biomarkers in these patients. For example, Angiopoietin-1 and Angiopoietin-2 levels are biomarkers for vascular endothelial cells. Angiopoietin-1 levels correlate with the maintenance of vascular integrity while Angiopoietin-2 levels correlate with endothelial inflammation and malfunction. We observed that Angiopoietin-1 levels increased more in patients treated with Auxora compared to placebo while Angiopoietin-2 levels decreased more. These changes were statistically significant and suggest a potential application for Auxora in AKI where endothelial cell function is compromised. Finally, work by others demonstrated that elevated serum IL‐17 levels, a CRAC channel mediated cytokine, were differentially elevated in critically ill patients with Stage 2 and 3 AKI when compared to those without AKI and the extent of elevation was independently associated with both hospital mortality and long-term adverse outcomes.

Angiopoietin-1 levels show a statistically significant greater increase in Auxora-treated patients compared to placebo patients while Angiopoietin-2 levels show a statistically greater decrease.

Preclinical Studies with Auxora in AKI

In collaboration with researchers at Indiana University, we have conducted a series of studies referred to as Study 1 and Study 2 comparing Auxora with placebo in a rat model of AKI. In Study 1, AKI was induced in a rat model through ischemia reperfusion injury (“I/R”), a transient ligation of the renal artery, while control animals underwent sham-surgery. Within 30 minutes of injury, the animals were treated with a single intravenous infusion of either 16 mg/kg of Auxora or placebo over a period of four hours. GFR, an important indicator of kidney function, was evaluated at 24 hours post-injury. Study 2 evaluated recovery of kidney function following I/R similar to Study 1 but varying in intensity to mimic different severity of disease. In Study 2, GFR was measured two to four hours after injury but before treatment, and treatment with 16 mg/kg of Auxora or placebo was administered at six, 24 and 48 hours post-injury, with GFR again evaluated at 72 hours.

Results from Study 1 showed that at 24 hours post-injury, GFR was significantly higher in rats treated with Auxora 30 minutes after injury versus placebo (61%, p<0.05). Additionally, animals treated with Auxora showed a reduction in Th17 cells in the kidney of approximately 50% as compared to those treated with placebo. In Study 2, in a group of animals with initial GFR reductions of approximately 50%, similar to Stage 2 AKI, GFR at 72 hours was significantly greater in Auxora-treated animals as compared to placebo-treated animals (0.81±0.03 vs. 0.47±0.04 ml/min/100g respectively; p<0.001). In a group of animals with GFR reductions ≥66%, similar to Stage 3 AKI, placebo-treated rats experienced 100% mortality by 72 hours while Auxora-treated rats had no mortality at 72 hours and were stable, showing modest recovery of kidney function. These results indicate that Auxora has the ability to hasten the recovery of kidney function and improve survival in rat models of AKI.

Study 1 results showing greater recovery of GFR in Auxora treated rats versus placebo as well as a reduction on mononuclear (Th17 producing cells.

Study 2 results show the effects of Auxora on recovery of renal function after establishment of renal functional impairment. GFR is shown at two hours and 72 hours post I/R. Panel A: results from rats with initial loss of GFR of approximately 50% between two to four hours post I/R show that the recovery of GFR is greater in Auxora treated animals (n=5) compared to placebo (n=4). Panel B: results from rats with an initial loss of GFR ≥ 66% show that placebo-treated rats (n=3) did not survive while Auxora-treated rats (n=2) survived.

Auxora for the Treatment of Acute Respiratory Failure

The pathology of COVID-19 is consistent with both a significant increase in the levels of inflammatory cytokines and with the associated deterioration of lung barrier function that can culminate in ARDS. In the first quarter of 2020, we recognized that observations from our clinical trial of Auxora in patients with AP provided support for conducting a clinical trial to assess the potential of Auxora in severe COVID-19 pneumonia patients. In AP patients presenting with markedly elevated levels of IL-6, there was a significant reduction in IL-6 levels over the course of therapy in patients who were treated with Auxora versus SOC alone. Of the four AP patients enrolled in our Phase 2a clinical trial who presented with respiratory failure and were treated with Auxora, only one required intubation and mechanical ventilation. There was only one patient in the SOC control group with respiratory failure and this patient required intubation and mechanical ventilation. This preliminary data and the strong preclinical rationale both led us to propose that Auxora may have therapeutic benefit in the treatment of other diseases with respiratory failure, including severe COVID-19 pneumonia.

In April 2020, we initiated a clinical trial to test Auxora in COVID-19 patients hospitalized and requiring oxygen therapy but not on ventilators. This trial was initially conducted as a Phase 2 randomized, open-label clinical trial in severe COVID-19 pneumonia patients with varying degrees of respiratory failure where time to survival, blood oxygen levels, ventilator use and mortality were evaluated. At our first safety analysis of the data we observed that patients receiving Auxora with SOC were less likely to be placed on mechanical ventilation or to die, and they experienced a reduced time to recovery than those treated with SOC alone. After 30 patients were enrolled in this first part of the trial (Part 1), the FDA recommended that we move to Part 2 of the trial and study Auxora in a randomized, double-blind, placebo-controlled clinical trial. Part 2 was initiated in September 2020, completed in the third quarter of 2021, and enrolled 284 severe COVID-19 pneumonia patients. We observed that patients treated with Auxora experienced a reduced time to recovery, higher rate of recovery and reduced mortality.

COVID-19 and Acute Respiratory Failure Background

COVID-19 is a disease caused by the SARS-CoV-2 virus, a pandemic strain of coronavirus. Respiratory illness is the most common symptom associated with COVID-19; severity ranges from mild disease to life-threatening ARDS.

Most cases of COVID-19 occur approximately four to five days after exposure to the virus. Patients present with symptoms that include fever, dry cough, body ache, sore throat and diarrhea. As the disease progresses, some patients develop shortness of breath resulting from lung injury and are hospitalized. In the majority of these patients, this condition resolves over time, but in up to 20% of patients, it progresses to moderate to severe ARDS requiring mechanical ventilation.

Disease progression in severe COVID-19 has similarities to that of severe community-acquired pneumonia caused by other viruses besides SARS-CoV-2 or by bacteria. The immune response to severe COVID-19 infection may result in overproduction of early response

proinflammatory cytokines and may also result in complement and coagulation dysfunction, leading to an increased risk of vascular hyperpermeability, respiratory failure, multi-organ failure, and sometimes death.

Completed Open-label Phase 2 Clinical Trial in Hospitalized COVID-19 Pneumonia Patients on Oxygen (Part 1).

We initially conducted a randomized, open-label clinical trial in severe and critical COVID-19 pneumonia patients (Part 1 of the Phase 2 trial). We originally planned to enroll up to 60 patients with severe COVID-19 pneumonia, defined as patients receiving low-flow supplemental oxygen, and 60 patients with critical COVID-19 pneumonia, defined as patients receiving high-flow oxygen through a nasal cannula but not ventilated using bi-level positive airway pressure, continuous positive airway pressure or invasive mechanical ventilators. Two thirds of patients were to be randomized to receive Auxora with SOC therapy and one third with SOC alone. Part 1 was stopped after 30 patients were enrolled and the trial progressed to Part 2. The results from Part 1 of the trial were published in July 2020 in the peer-reviewed journal Critical Care.

Trial design for open-label Phase 2 clinical trial in hospitalized COVID-19 severe pneumonia patients on oxygen (Part 1).

Patients enrolled in Part 1 of the Phase 2 clinical trial were randomized to the Auxora plus SOC treatment group, were dosed intravenously with Auxora for three days at levels of 2.0 mg/kg on the first day and 1.6 mg/ kg on days two and three. The primary objectives of this clinical trial were safety and tolerability. At the time this part of the clinical trial was stopped, 30 patients had been enrolled, 26 with severe COVID-19 pneumonia and four with critical COVID-19 pneumonia.

The 26 patients with severe COVID-19 pneumonia were used in the efficacy analysis of the open-label part of the clinical trial. Patients enrolled in the Auxora plus SOC and the SOC only groups were well-matched across age, body mass index and ethnic backgrounds. A higher percentage of patients in the Auxora plus SOC group had diabetes. The severity of ARDS was distributed roughly equally among the Auxora plus SOC and SOC only groups.

As part of our analysis of the efficacy of Auxora in the open-label trial, we also considered the respiratory failure status of patients at enrollment because we believed that this would best correlate with outcomes for these patients. Respiratory failure is divided into three stages based on the Horowitz index, which takes into account how much oxygen is in the blood compared to how much oxygen the patient is provided. The Horowitz index, therefore, is able to account for differences in oxygenation of a patient on room air versus one on higher concentrations of supplemental oxygen. This index is calculated by taking the ratio of the arterial oxygen partial pressure to the fraction of inspired oxygen, known as PaO2/FiO2 or the P/F ratio. The P/F ratio may also be imputed from the oxygen saturation by pulse oximetry. Based on the Berlin Criteria, patients with a P/F ratio of 200 to 300 mmHg are considered to have mild ARDS. Patients with P/F ratios between 100 and 200 mmHg are considered to have moderate disease. Patients with a P/F ratio of 100 mmHg or less have severe ARDS. Even in the absence of COVID-19, an increase in ARDS severity is correlated with increased mortality. In historical pneumonia studies, patients with mild ARDS have a mortality of approximately 35% compared to 45% mortality for those with severe ARDS.

Baseline demographics were generally balanced across the treatment groups.

Clinical outcomes in Part 1 of the Phase 2 clinical trial were highly dependent on the baseline P/F ratio. Patients with mild ARDS all recovered in both the Auxora plus SOC treatment group and the SOC only treatment group. Regardless of treatment, none of these patients required intubation and mechanical ventilation. Patients with moderate ARDS treated with Auxora plus SOC had an improved outcome compared to SOC alone. Only one of six of the patients (17%) in the Auxora plus SOC group was placed on mechanical ventilation and later died, whereas three out of four patients (75%) in the SOC only treatment group required intubation and mechanical ventilation with one death. Of the four patients enrolled with severe ARDS and treated with Auxora plus SOC, two required intubation and mechanical ventilation (50%) and one of these patients died (25%). In the SOC only group, one of two severe ARDS patients enrolled required intubation and mechanical ventilation (50%). The other patient progressed to high-flow oxygen quickly, but the family elected not to proceed with intubation and the patient died (50%).

Overview of the outcome of all 26 severe COVID-19 pneumonia patients grouped by P/F at baseline with the most severe patients at the bottom. Blue lines correspond to patient who received Auxora (denoted CM4620-IE) plus SOC and green lines to patients who received SOC only.

COVID-19 recovery was scored using an 8-point ordinal scale recommended by the FDA in which a high score of 8 means that the patient was discharged from the hospital without the need for supplemental oxygen, 7 means discharged requiring supplemental oxygen, 6 means hospitalized not requiring oxygen or ongoing medical care, 5 means hospitalized not requiring oxygen but requiring ongoing medical care, 4 means hospitalized requiring low flow supplemental oxygen, 3 means hospitalized requiring noninvasive mechanical ventilation or high flow supplemental oxygen, 2 means hospitalized requiring invasive mechanical ventilation and 1 means that the patient has died.

The number of days for recovery was determined by the first day that a patient satisfied a score of 6 or greater. Patients treated with Auxora plus SOC had a mean time to recovery of five days while those on SOC-only treatment had a mean recovery time of 12 days and the recovery rate ratio was 1.87 (95% confidence interval, with a range of 0.72 to 4.89). For additional information regarding confidence intervals, please refer to the section entitled “—Auxora, a Selective CRAC Channel Inhibitor—P-Values and Confidence Intervals.”

A composite endpoint of death or intubation occurred significantly less frequently in patients treated with Auxora plus SOC than with SOC only treatment. Five of the nine patients (56%) with severe COVID-19 pneumonia who were treated only with SOC required intubation and mechanical ventilation or died compared to only three of 17 patients who received Auxora plus SOC (18%) (95% CI, 0.05 to 0.96; p<0.05).

Treatment with Auxora led to a reduction in the composite endpoint of patients who required intubation or died because of a do not intubate decision.

In addition to the clinical outcome measures of the severe COVID-19 pneumonia patients, we assessed the levels of d-dimer, a biomarker associated with clotting and a predictor of poor survival in COVID-19 patients. Increased blood clotting and thrombosis is believed to be a significant contributor to the development of ARDS in these patients. All patients in the trial received anticoagulant therapy, and despite this treatment, two patients on SOC only developed deep vein thromboses with one progressing to a pulmonary embolism, while no patients treated with Auxora plus SOC experienced thrombo-embolic events. On average, patients treated with Auxora plus SOC (n=10) had a median decrease in d-dimer levels at 48 hours of 0.24 while patients receiving SOC alone (n=8) had a median increase of 0.63. Even greater differences were seen at 96 hours although the sample size was small. We believe this is indicative of a protective effect of Auxora treatment on the endothelium.

Auxora treated patients experienced a reduction in d-dimer levels, a biomarker associated with clotting.

In total, 17 patients with severe and three with critical COVID-19 pneumonia were randomized to Auxora plus SOC and nine with severe and one with critical COVID-19 pneumonia were randomized to SOC only. All 30 patients were included in the safety analysis. Similar proportions of patients receiving Auxora plus SOC and SOC only experienced an AE (75% versus 80%, respectively). Fewer

patients receiving Auxora plus SOC experienced serious AEs versus SOC only (30% versus 50%, respectively). Two patients (10%) receiving Auxora plus SOC and two (20%) receiving SOC only died during the 30 days after randomization. Except for one of the two cases of an increase in blood alkaline phosphatase (an enzyme that can indicate liver damage and bone disorders), which was considered possibly Auxora-related, none of the other AEs were deemed to be drug- related by the principal investigators.

The following SAEs occurred in patients treated with Auxora: septic shock, bacterial pneumonia, atrial fibrillation, shock, respiratory failure, ARDS and chest pain. None of the SAEs were deemed to be Auxora-related by the principal investigators.

After 18 severe COVID-19 pneumonia patients were enrolled, the FDA reviewed initial data along with safety data from an independent safety review committee and recommended that this open- label trial be converted into a randomized, double-blind, placebo-controlled trial (Part 2 of the Phase 2 trial).

Completed Double-Blind Phase 2 Clinical Trial in Hospitalized COVID-19 severe Pneumonia Patients on Oxygen (CARDEA or Part 2)

In September 2020, we began enrollment of our CARDEA trial, a Phase 2, randomized, double-blind, placebo- controlled trial evaluating the addition of Auxora to corticosteroids and standard of care in adults with severe COVID-19 pneumonia. Eligible patients were adults with more than one symptom consistent with COVID-19 infection, a diagnosis of COVID-19 confirmed by laboratory testing using polymerase chain reaction or other assay, and pneumonia documented by chest imaging. Patients were also required to be receiving oxygen therapy using either a high flow or low flow nasal cannula at the time of enrollment and, for the 261 patients in the efficacy analysis set, to have at the time of enrollment, a baseline imputed PaO2/FiO2 ratio > 75 and ≤ 200.

There were an additional 23 patients in the trial with 200<PaO2/FiO2<300 who were enrolled prior to the first independent data monitoring committee meeting, where it was determined those less hypoxemic patients all recovered and were less likely to need therapy beyond current standard of care so going forward, mild ARDS patients, e.g., patients with PaO2/FiO2>200, were then excluded from enrollment. The PaO2/FiO2 was imputed from a SpO2/FiO2 determined by pulse oximetry using a non-linear equation. Patients could not be receiving either non-invasive or invasive mechanical ventilation at the time of enrolment. The primary endpoint was time to recovery through Day 60, with secondary endpoints of all-cause mortality at Day 30 and Day 60. All patients received corticosteroids and 99% of patients received anticoagulation treatment as part of their standard of care.

The major findings of the CARDEA Phase 2 trial as reported in April 2022 in the peer-reviewed journal Critical Care are as follows:

•

Time to recovery was seven vs. ten days (P = 0.0979) for patients who received Auxora vs. placebo, respectively.

•

Day 30 all-cause mortality was 7.7% with Auxora vs. 17.6%, with placebo (P = 0.0165).

•

Day 60 all-cause mortality was 13.8% with Auxora vs. 20.6% with placebo (P = 0.1449).

•

Serious adverse events occurred in 24.1% of patients treated with Auxora vs. 35% of patients receiving Placebo (P=0.0616).

SOC included 100% corticosteroid use and 99% anticoagulation use

Trial design for double-blind Phase 2 clinical trial in hospitalized COVID-19 pneumonia patients on oxygen (Part 2).

Baseline demographics were balanced across the treatment groups in the blinded Phase 2 trial of Auxora in severe COVID-19 pneumonia.

Overall mortality was significantly reduced with Auxora treatment in the 261-patient efficacy dataset. At 30 days, the mortality rate for Auxora-treated patients with 7.7% compared to 17.6% for placebo (HR 0.42 and p=0.023) – a relative decrease of 56%. At 60 days, Auxora treatment was associated with a 13.8% mortality rate compared to 20.6% for placebo (HR 0.63 and p=0.130) – a relative decrease of 33%. Both of these findings are clinically relevant particularly in light of patients needing additional therapies on top of current standard of care. Patients treated with Auxora plus SOC demonstrated a trend toward a faster median time to recovery than those treated with SOC plus placebo. Our primary recovery endpoint was determined in the 261-patient efficacy analysis set where Auxora treatment demonstrated a trend toward a reduced time to recovery with a median of seven days compared to ten days with placebo (p=0.098). In an FDA-required supplementary analysis of our primary endpoint in the 284 patient safety analysis set (which included 23 patients with mild COVID-19 pneumonia (P/F 201 to 300)), the median recovery time for Auxora treated patients was maintained at seven days, while the median recovery time for placebo treated patients decreased to eight days (p=0.042). In both analysis sets, the percent of patients that recovered in the trial was higher when Auxora was added to SOC therapy. The recovery rate ratio, defined as the percent of patients who did not recover on placebo compared to the percent that did not recover with Auxora, was 1.25 for the efficacy analysis set and 1.30 for the safety analysis set. This means that not only did patients treated with Auxora plus SOC demonstrate a trend toward a reduced time to recovery, but that they were more likely to recover than patients treated with placebo plus SOC.

Other key findings in the study were that patients receiving Auxora saw their PaO2/FiO2 ratios recover more quickly than patients receiving placebo and proportionally fewer patients receiving Auxora required ventilation over their course of treatment than patients receiving placebo. There were also fewer patients with reported serious adverse events in the Auxora treated group than in those receiving placebo. These findings are all clinically relevant, particularly given the relative risk reduction in mortality for patients receiving Auxora in addition to standard of care. Finally, there were improvements in a number of inflammatory biomarkers in Auxora treated patients versus those receiving placebo. Specifically, C-reactive protein, ferritin and d-dimer levels dropped over the course of six days and were lower than placebo over that time. CD-25 levels, which are a surrogate for the expansion of pro-inflammatory CD25+CD8 T cells that have been associated with mortality, were statistically significantly lower in Auxora patients compared to placebo.

Auxora positive effects compared to placebo on multiple clinical endpoints in CARDEA (N=261)

Auxora positive effects compared to placebo on multiple biomarkers of respiratory inflammation in CARDEA (N=261)

Auxora plus SOC demonstrated a significant decrease in mortality compared to placebo plus SOC. (N=261)

Kaplan Meier curve of mortality. Auxora plus SOC (blue), placebo plus SOC (red). (N=261)

Auxora was generally well-tolerated in our CARDEA trial. The number of adverse events in the blinded part of the study was similar between the two treatment groups (patients randomized to Auxora (331); patients randomized to placebo (342)). Fewer patients randomized to Auxora (34, 24.1%) had SAEs compared to patients randomized to Placebo (49, 35.0%). There were five SAEs that the

investigators reported as possibly related to Auxora: increase in alanine aminotransferase (an indicator of liver dysfunction), increase in aspartate aminotransferase (an indicator of liver dysfunction), cardiac arrest, respiratory failure and shock. Two of these (increase in alanine aminotransferase and increase in aspartate aminotransferase) occurred in only two patients. There were no SAEs that required expedited safety reporting to institutional review boards or to the FDA. Three patients randomized to Auxora and five patients randomized to placebo discontinued study drug.

Ongoing Phase 2 Trial in Mechanically Ventilated COVID-19 Pneumonia ARDS Patients

Work at Northwestern University has focused on immune cell activity in the lung fluid of COVID-19 pneumonia patients on mechanical ventilation implicates IFN-g-secreting T cells as key participants in the cascade of lung damage in these patients. Evidence suggests CRAC channels are a critical nexus in this cascade.

According to the data from Northwestern scientists, the mechanism of lung inflammation produced by SARS-CoV-2 begins with virus infection of cells in the nose, throat and upper lung. Viral infection then spreads to deeper areas of the lung and enters lung-resident macrophages which, in response, degrade viral proteins and present viral antigens on their cell surface to T cells; they also release chemokines that attract additional T cells to the area. The arriving T cells interact with the SARS-CoV-2 antigens presented on the surface of macrophages, activating the T cells to produce and secrete the pro-inflammatory cytokine IFNg. This sets up a positive feedback loop that leads to further immune recruitment, activation and inflammation. Based on the role of CRAC channels in immune cell activation, Auxora can block IFNg release from T cells, potentially inhibit antigen presentation by macrophages, and block the release of chemokines and pro-inflammatory cytokines from monocytes, thereby limiting the lung inflammation produced by SARS-CoV-2.

Inhibition of IFNgsecretion in the lung of COVID-19 patients has the potential to block activation of inflammatory cells such as alveolar macrophages.

We, in collaboration with investigators at Northwestern, are conducting a Phase 2 dose escalation clinical trial of Auxora in mechanically ventilated patients with COVID-19 pneumonia to test this hypothesis and to determine an effective dose of Auxora for treating these patients using pharmacodynamic markers from bronchoalveolar lavage (lung) fluid. This trial has completed the treatment portion and samples from the patients are being analyzed for gene expression and biomarker information. Nine patients received either Auxora (n=7) or placebo (n=2) for three, four or five days or an initial infusion followed by four days of continuous infusion. The amount of time that patients remain on the ventilator was measured as part of the trial. Lung lavages were taken before and after treatment to determine the level and activity of macrophages, monocytes and IFNg-secreting T cells in patients receiving drug and placebo. We anticipate results from this trial in 2024. We plan to use the findings of this clinical trial to establish an effective dosing schedule for further studies of Auxora in the treatment of ventilated ARDS patients.

Trial design for Phase 2 trial in mechanically ventilated COVID-19 pneumonia ARDS patients.

Planning for Additional Clinical Trials in AHRF and ARDS

Based on the mechanism of action of Auxora and the reduction in ventilator use that was observed in our COVID-19 pneumonia and AP clinical trials, we believe that Auxora has the potential to bring therapeutic benefit to a broader population of patients suffering from AHRF and ARDS. Our recent work elucidating the activity of Auxora in an LPS-induced mouse model of respiratory failure confirmed that the drug down-regulates inflammatory cytokines in the lungs and likely protects the lung endothelium from damage.

The broader ARDS patient populations include many etiologies including sepsis, viral pneumonia, bacterial pneumonia and trauma. The incidence of ARDS is estimated to be approximately 190,000 cases per year in the United States alone, with sepsis being the most common cause. We believe that the Auxora clinical data in COVID-19 pneumonia suggests that Auxora can potentially be used in most ARDS settings. We are currently evaluating opportunities to continue clinical development of Auxora in the setting of acute respiratory failure particularly in partnership with sponsors such as government agencies both in the US and outside of the US.

Preclinical Studies with Auxora in ARDS

Endothelial cells in the lung help to maintain the boundary between blood vessels and air-exchange sacs, or alveoli, by providing an insulating barrier function, preventing fluid from leaking out of blood vessels while allowing the exchange of oxygen and carbon dioxide within the lung alveoli. The integrity of this endothelial barrier is dependent on many things, including calcium regulation. The endothelial barrier breaks down when an excess of intracellular calcium causes the activation of NFAT, driving deleterious changes in gene transcription. This breakdown leads to fluid leakage into the lung and impedes the lung’s ability to absorb oxygen and release carbon dioxide. CRAC channels, which help regulate the amount of calcium flowing into endothelial cells, sit at a key junction point in this biochemical cascade. Zegocractin, the active ingredient in Auxora, was able to produce a beneficial effect in the lung consistent with inhibiting the breakdown in endothelial barrier function in an in vivo model of pathogen-induced lung injury. In this model, a bacterial glycoprotein called LPS was instilled into the nasopharynx of mice, which induced a reaction inside the lung similar to what would happen in acute lung injury resulting from an active bacterial infection. Zegocractin was administered two and seven hours after LPS and the animals were examined 12 hours after LPS by measuring several biomarkers in lung fluid using antibody technology as well as lung histopathology. A prominent and well known effect of LPS in this model was to increase levels of two key inflammatory cytokines, IL-6 and TNFμ, in lung fluid. Treatment with zegocractin led to a dose-dependent decrease in the LPS-induced IL-6 and TNFμ levels (maximum 46% and 57%, respectively) in lung fluid and also decreased the LPS-induced edema surrounding the lung (maximum 61%) compared to placebo-treated controls. The decrease in lung edema is consistent with protection of the endothelial cell barrier. We believe that inhibitors of CRAC channels have the potential to inhibit the breakdown of the lung endothelial barrier in patients suffering from ARDS.

PBS - phosphate buffered saline, LPS - lipopolysaccharide, Veh - vehicle, Zego - Zegocractin, mpk - milligrams per kilogram, x2 - given twice at 5-hour intervals

Zegocractin lowered IL-6 and TNFμ levels in lung fluid and reduced edema in an LPS model of acute lung injury.

Preclinical studies for Chronic Inflammatory and Immunological Diseases

We are developing oral CRAC channel inhibitors that we intend to take into indications which are not treated in a critical care setting such as chronic inflammatory and immunological diseases. We have obtained or generated preclinical data which support the use of CRAC channel inhibitors in indications such as chronic pancreatitis, rheumatoid arthritis, asthma and psoriasis where an IV formulation would not represent a viable therapeutic approach. Repeated attacks of AP, as well as heavy alcohol use and genetic anomalies, can lead

to the development of chronic pancreatitis, a debilitating disease characterized by pain, fibrosis and declining pancreatic function that increases the risk of developing pancreatic cancer by a factor of ten to 100. According to the Pancreatitis Foundation, approximately 140,000 people suffer from chronic pancreatitis in the United States alone. We believe this will be considered an orphan indication and intend to apply for orphan designation with the FDA. While there are numerous treatments for rheumatoid arthritis, most patients require injectable immunomodulatory drugs as the disease progresses. The need for safe oral therapies for more advanced patients persists. We are evaluating chronic pancreatitis and rheumatoid arthritis as potential first indications for our oral drug candidate, CM6336.

Preclinical Study with a CRAC Channel Inhibitor in Chronic Pancreatitis

Our preclinical studies of CM5480, a proprietary compound, in chronic pancreatitis suggest that CRAC channel inhibition may decrease fibrosis and organ dysfunction in this setting. We are currently performing IND-enabling preclinical studies with multiple proprietary compounds in order to identify one or more candidates with good pharmaceutical properties. CM6336, our current lead oral CRAC channel inhibitor, is structurally distinct from CM5480 but with potentially improved pharmacokinetic properties. We plan to submit an IND for CM6336 in chronic pancreatitis in 2025 and may be in a position to and initiate a Phase 1/1b clinical trial the same year, subject to receipt of additional funding.

We tested CM5480 in a mouse model of chronic pancreatitis, in which animals are given eight hourly injections of cerulein per day on five occasions, each separated by two intervening cerulein-free days. CM5480, a model compound, was given by once-daily intraperitoneal injections for nine days starting after the third round of cerulein injections. The cerulein injections produced pancreatic fibrosis and reductions in pancreatic epithelial (mostly acinar) cells and ductal cell secretion. We found that CM5480 reduced pancreatic fibrosis by 50%, modestly increased epithelial cells, and restored pancreatic ductal cell secretion. These results suggest that there is the potential to treat chronic pancreatitis with a CRAC channel inhibitor, especially one that can be readily administered to patients, such as with an oral formulation.

CM5480 (CM-C) reduced acinar cell necrosis (top panels), prevented the formation of fibrosis (bottom left) and restored pancreatic ductal secretion (bottom right) in a mouse model of chronic pancreatitis.

Preclinical Studies with CRAC Channel Inhibitors in Models of Rheumatoid Arthritis

Previous work by us and others has indicated that inhibition of Orai1 CRAC channels may be an effective treatment for rheumatoid arthritis. A 2015 studypublished in the British Journal of Pharmacology examined the effects of YM-58483 (aka BTP-2), a model

CRAC channel blocker, and showed that the compound produced significant improvements in arthritis severity scores in a mouse model of collagen-induced arthritis (“CIA”). Likewise, a 2017 published studyin the Journal of Pharmacological Sciences showed that localized reduction of Orai1 mRNA in the joints and lymph nodes reduced the severity of arthritis in a mouse CIA model.

Consistent with the findings above, in our preclinical studies, we have demonstrated that several of our Orai1-selective CRAC channel blockers are efficacious at reducing histopathology in a rat model of CIA. Thus, zegocractin (CM4620) and model compounds CM5480 and CM6325 when dosed orally once-daily at 25 mg/kg produced significant reductions in knee histopathology that averaged 61%, 76% and 71%, respectively. Data from a representative study with CM6325 is shown below. In this study, the reductions in knee histopathology scores corresponded with reductions in a pharmacodynamic measure of stimulated IL-2 release in an ex vivo blood assay.

CM6325 produced significant and dose-related reductions in summed knee histopathology scores (composed of measures of inflammation, pannus formation, cartilage damage and bone resorption) in rat model of collagen-induced arthritis. Blood samples taken at the end of the study showed that a pharmacodynamic (PD) readout, stimulated IL-2 release, was also decreased by CM6325 in a significant and dose-related manner. *p < 0.05

We plan to submit an IND for CM6336 in rheumatoid arthritis in 2025.

Preclinical Study in Inflammatory Bowel Disease

Recent animal data indicates that CRAC channel inhibition by zegocractin (CM4620) may be effective in the treatment of inflammatory bowel disease, such as ulcerative colitis. In a preclinical study performed with scientists from Charite – University Medicine, Berlin and New York University Grossman School of Medicine, it was shown that zegocractin administered orally to mice every other day for a period of 30 days produced a significant reduction in intestinal inflammation in a model of ulcerative colitis. Consistent with the anti-inflammatory action of zegocractin, reductions in the frequencies of IFN-g, TNFα and IL-2 producing CD4 T cells were also observed in T cells isolated and stimulated ex vivo at the end of the study. These data, published in 2022 in the journal EMBO Molecular Medicine, suggest that zegocractin could be effective in treating patients with acute flares of inflammatory bowel disease.

Systemic administration of CM4620 (zegocractin) alleviates colon inflammation in mice. Histological sections of distal and proximal colon were scored for the presence of inflammatory cells (Colitis Score). CD4+ T cells were isolated from animals after

treatment with vehicle or CM4620 and stimulated ex vivo with a phorbol ester (PMA) + ionomycin for 4 hours. Frequencies (%) of IFN-g, TNFα and IL-2 T cells were then determined.

Preclinical Study in Allergic Asthma

The effectiveness of zegocractin (CM4620) was compared in mouse models of asthmatic airway inflammation and influenza A virus infection to determine if inhibition of CRAC channels reduces asthmatic inflammation without interfering with the antiviral response. Researchers from New York University Grossman School of Medicine showed that in a model of allergic airway inflammation oral administration of zegocractin significantly lowered both peribronchiolar inflammation and lung mucus production. Conversely, there was no effect of zegocractin on lung viral load in a model of influenza A virus infection. These results indicate zegocractin may be an effective treatment for allergic asthma but will not decrease the anti-viral response to a viral infection. These data were published in the journal Science Advances in 2022.

CM4620 (zegocractin) reduces lung inflammation in a mouse model of allergic asthma but does not compromise adaptive immunity to influenza A virus infection. Lung sections from control and CM4620 treated asthmatic mice were stained with hematoxylin and eosin (H&E) or periodic acid- Schiff (PAS) to detect inflammation and mucus production, respectively. Influenza A virus (IAV) expression was quantified in lung by quantitative RT-PCR of RNA for nuclear segment 5 of IAV (a specific probe for IAV), and is presented as expression relative to the housekeeping gene Rpl32.

Preclinical Study in Traumatic Brain Injury

In a preclinical study performed with investigators at the San Francisco Veterans Affairs Hospital and UCSF, CM5480, a proprietary tool compound, was tested in a mouse model of traumatic brain injury in which animals were subjected to a controlled cortical impact with an automated impactor to induce brain injury. It was observed that treatment with CM5480 led to significant protection of mice from traumatic brain injury as determined by decreased lesion size, brain hemorrhage and improved neurological deficits with decreased microglial activation. This study was published in Journal of Neurotrauma in 2019.

We are conducting preclinical pharmacokinetic and IND-enabling toxicology studies on a number of product candidates from our portfolio in order to identify one that readily crosses the blood-brain barrier. We are evaluating these observations and our preclinical results and will consider whether to submit an IND in this indication in the future.

CM5480 (CM-EX-137) reduced injury in a traumatic brain injury model in mice.

Sales and Marketing

Given our stage of development, we have not yet established a commercial organization or distribution capabilities. We intend to build a commercial infrastructure to support sales of our product candidates. We expect to manage sales, marketing and distribution through internal resources and third-party relationships. While we may commit significant financial and management resources to commercial activities, we will also consider collaborating with one or more pharmaceutical companies to enhance our commercial capabilities. As our future product candidates progress through our pipeline, our commercial plans may change. Clinical data, the size of the development programs, the size of our target markets, the size of a commercial infrastructure and manufacturing needs may all influence our commercialization strategies.

Manufacturing

We do not own or operate manufacturing facilities for the production of any of our future product candidates, nor do we have plans to develop our own manufacturing operations in the foreseeable future. We currently rely, and expect to continue to rely for the foreseeable future, on contract manufacturing organizations (“CMOs”) for all our required raw materials, drug substance and drug product needs for preclinical research, clinical trials and initial commercialization. We do not have long-term agreements with any of these third parties. We also do not have any current contractual relationships for the manufacture of commercial supplies of any of our future product candidates and do not plan to enter into any until further into clinical development. If any of our products are approved by any regulatory agency, we intend to enter into agreements with a CMO and one or more back-up manufacturers for the commercial production of those products. Development and commercial quantities of any products that we develop will need to be manufactured in facilities, and by processes, that comply with the requirements of the FDA and the regulatory agencies of other jurisdictions in which we are conducting clinical research or seeking marketing approval.

Competition

The pharmaceutical and biotechnology industries are characterized by intense competition and rapid innovation. While we believe that our product candidates, as well as our development experience and scientific knowledge may provide significant advantages, relative to current approaches and therapies in the treatment of acute critical illnesses and chronic inflammatory and immunologic diseases, our competitors may be able to develop other compounds or drugs that are able to achieve similar or better results. We face potential competition from many different sources, including large multinational pharmaceutical companies, established biotechnology companies and specialty pharmaceutical companies, and universities and other research institutions. Many of these groups have materially greater financial, manufacturing, marketing, research and drug development resources than we do. Large pharmaceutical companies in particular have extensive expertise in preclinical and clinical testing and in obtaining regulatory approvals for drugs. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large, established companies.

We are a clinical-stage biopharmaceutical company focused on developing therapeutics that treat serious illnesses driven by inflammatory processes and direct cellular damage. The molecular targets we are addressing are CRAC channels, and our most advanced clinical candidate, Auxora, is in clinical trials for AP with accompanying SIRS, AIPT with AHRF. Other companies, including Daiichi-Sankyo Company, Limited, Rhizen Pharmaceuticals AG, PRCL Research, Inc., Vivreon Biosciences, LLC and ChemiCare srl, have CRAC channel inhibitors (including both small molecules and monoclonal antibodies) in clinical or preclinical development for various indications. Several of these have reached Phase 1 or Phase 2 clinical trials in indications we are not currently pursuing. Any of these companies could elect to re-direct their efforts and compounds to indications we are pursuing.

With respect to our lead indication, AP with accompanying SIRS, we are developing Auxora as a disease- modifying product candidate, whereas other treatments and approaches in clinical development focus on addressing symptoms or sequelae. These include various types of pain medications, anti-inflammatories, anti-coagulants, antibiotics, fluids and feeding regimens. Amryt Pharma Plc and Regeneron Pharmaceuticals, Inc. also have agents in development that seek to reduce the risk of subsequent attacks of AP after a sentinel attack (known as recurrent AP) due to a particular etiology (familial chylomicronemia syndrome (“FCS”)). FCS patients represent less than 2% of the AP population.

With respect to AIPT, there is currently no disease modifying treatment for patients who develop pancreatic toxicity as a result of asparaginase. The current SOC addresses symptoms like pain, the inability to eat, and infection.

With respect to our efforts in other acute critical illnesses with Auxora, there are a number of companies, particularly with anti-inflammatory technologies. In the area of AKI, most companies in the space are pursuing strategies to prevent AKI in high risk populations. There is one clinical trial on-going to treat AKI in the setting of sepsis. Currently, to our knowledge, there are no novel compounds in clinical development in the US that are being used to treat rather than prevent AKI. If, however, a strategy to prevent AKI were to be effective, the number of patients we are targeting for Auxora could decrease. In the area of respiratory failure and, specifically, COVID-19 pneumonia, there are a number of companies pursing anti-inflammatory approaches to treating these diseases. Currently, Roche’s tocilizumab, Imclone’s baricitinib, SOBI’s anakinra and dexamethasone are all approved under EUAs to treat severe COVID-19 pneumonia patients on oxygen. Sanofi’s sarilumab which has the same mechanism of action as tocilizumab has also been

recommended for use in severe COVID-19 pneumonia by WHO. Some of these drugs as well as others currently in development for COVID-19 pneumonia may prove efficacious in broader respiratory failure, particularly respiratory failure caused by viral pneumonias.

Our commercial opportunity could be substantially limited in the event that our competitors develop and commercialize products that are more effective, safer, more convenient or cheaper than our product candidates. In geographies that are critical to our commercial success, competitors may also obtain regulatory approvals before us, resulting in our competitors building a strong market position in advance of our product’s entry. We believe the competitive factors that will determine the success of our programs will be the efficacy, safety, pricing and reimbursement, and convenience of our future product candidates.

Intellectual Property

We have developed and continue to expand our patent portfolio for Auxora. As of December 31, 2023, we have issued patents and pending patent applications in the United States and other countries throughout the world directed to compositions of matter, various methods of use, formulations, and synthetic processes. For patents directed to compositions covering Auxora, we own four issued U.S. patents and 63 issued patents in the following jurisdictions: Argentina, Australia, Austria, Belgium, Bulgaria, Brazil, Canada, Czech Republic, Denmark, Finland, France, Germany, Greece, Hong Kong, Hungary, Ireland, Israel, Italy, Japan, Luxembourg, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Slovakia, Switzerland, Turkey, United Kingdom, Eurasian Patent Organization, and Taiwan. We also have one pending U.S. patent application and seven pending patent applications in the following jurisdictions: Japan, Canada, China, India, and Korea directed to compositions covering Auxora. Composition of matter patents for our drug compound portfolio have expirations ranging from 2031 to 2036 with Auxora and other pre-clinical drugs having world-wide composition of matter patents to 2036, not including any patent term adjustment or any patent term extension.

For patents and patent applications directed to methods of using Auxora for the treatment of AP, as of December 31, 2023, we own two issued U.S. patents and 33 issued patents in the following jurisdictions: China, Japan, Australia the Eurasian Patent Organization, Austria, Belgium, Bulgaria, Canada, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Japan, Luxembourg, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Slovakia, Switzerland, Turkey, United Kingdom, and Taiwan. We also own two U.S. patent applications, and thirteen pending patent applications in the following jurisdictions: Australia, Canada, China, Europe, Hong Kong, Japan, and Taiwan for other indications. These issued patents and any patents issuing from pending U.S. and ex-U.S. applications are expected to expire between 2031-2041, not including any patent term adjustment or any patent term extension. We have also filed one international application directed to using a subject’s P/F ratio (the ratio of arterial oxygen pressure to fractional inspired oxygen) as a biomarker when treating acute lung injury and acute respiratory distress syndrome with Auxora. Any patents ultimately issuing from this international application are expected to expire around 2043, not including any patent term adjustment or patent term extension.

Additionally, we jointly own one issued U.S. patent, 13 issued patents in the following jurisdictions: Australia, Germany, France, United Kingdom, Belgium, Switzerland, Denmark, Ireland, Italy, Luxembourg, Netherlands, Sweden, and Japan directed to treatment for stroke and traumatic brain injury. These patents and any patents issuing from applications are expected to expire around 2036, not including any patent term adjustment or patent term extension. Also, we have filed one provisional application directed to treatment of non-alcoholic fatty liver disease using Auxora. Any patents ultimately issuing from this provisional application are expected to expire around 2044, not including any patent term adjustment or patent term extension.

Moreover, for patent protection directed to formulations and crystalline forms of Auxora, we have filed one U.S. patent application, one granted in China, one granted patent in Mexico, and seven pending applications in the following jurisdictions: Australia, Brazil, Canada, Europe, Japan, Korea, and Mexico. Any patents that ultimately issue from these patent applications are expected to expire around 2038, not including any patent term adjustment or patent term extension.

With respect to synthetic processes of Auxora, we have filed two U.S. patent applications, and pending applications in the following jurisdictions: Canada, China, Europe, India, Japan, and Korea. Any patents ultimately issuing from these PCT applications are expected to expire around 2040, not including any patent term adjustment or any patent term extension.

Beyond patent coverage for Auxora, we have 18 issued U.S. patents and 6 issued ex-U.S. patents directed to CRAC channel inhibitors and their uses.

In addition to patent protection, we rely on trade secret protection and know-how to expand our proprietary position around our chemistry, technology, and other discoveries and inventions that we consider important to our business.

Government Regulation and Product Approval

As a pharmaceutical company that operates in the United States, we are subject to extensive regulation. Government authorities in the United States (at the federal, state and local level) and in other countries extensively regulate, among other things, the research, development, testing, manufacturing, quality control, approval, labeling, packaging, storage, record-keeping, promotion, advertising, distribution, post-approval monitoring and reporting, marketing and export and import of drug products such as those we are developing.

Product candidates that we develop must be approved by the FDA, before they may be legally marketed in the United States and by the appropriate foreign regulatory agency before they may be legally marketed in a foreign country. Generally, our activities in other countries will be subject to regulation that is similar in nature and scope as that imposed in the United States, although there can be important differences. Additionally, some significant aspects of regulation in Europe are addressed in a centralized way, but country-specific regulation remains essential in many respects.

U.S. Drug Development Process

In the United States, the FDA regulates drugs under the Federal Food, Drug and Cosmetic Act (“FDCA”), and its implementing regulations. A new drug must be approved by the FDA pursuant to a new drug application (“NDA”) before it may be legally marketed in the United States. Drugs are also subject to other federal, state and local statutes and regulations. The process of obtaining regulatory approvals and the subsequent compliance with appropriate federal, state, and local statutes and regulations require the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S. requirements at any time during the product development process, approval process or after approval, may subject an applicant to administrative or judicial sanctions. Sanctions brought by the FDA and the Department of Justice (“DOJ”), or other governmental entities, could include, among other actions, refusal to approve pending applications, withdrawal of an approval, a clinical hold, warning letters, product recalls or withdrawals from the market, product seizures, total or partial suspension of production or distribution injunctions, fines, refusals of government contracts, restitution, disgorgement or civil or criminal penalties. Any agency or judicial enforcement action could have a material adverse effect on us.

The process required by the FDA before a drug may be marketed in the United States generally involves the following:

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completion of extensive preclinical laboratory tests, preclinical animal studies and formulation studies in accordance with applicable regulations, including the FDA’s Good Laboratory Practice (“GLP”) regulations and other applicable regulations;

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submission to the FDA of an IND, which must become effective before human clinical trials may begin;

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approval by an independent institutional review board (“IRB”) at each clinical site before each trial may be initiated;

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preparation of clinical trial material in accordance with current Good Manufacturing Practices (“cGMPs”);

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performance of adequate and well-controlled human clinical trials in accordance with applicable regulations, including the FDA’s good clinical practice (“GCP”) regulations to establish the safety and efficacy of the proposed drug for its proposed indication;

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submission to the FDA of an NDA, including payment of application user fees, after completion of all pivotal trials, and which provides substantive evidence of the products’ candidates safety and efficacy from results of nonclinical testing and clinical trials;

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a determination by the FDA within 60 days of its receipt of an NDA that the application is sufficiently complete to permit a substantive review, in which case the NDA is filed for review;

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satisfactory completion of an FDA pre-approval inspection of the manufacturing facility or facilities where the drug is produced to assess compliance with the FDA’s cGMP requirements to assure that the facilities, methods and controls are adequate to preserve the drug’s identity, strength, quality and purity;

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potential FDA audit of the preclinical and/or clinical trial sites that generated the data in support of the NDA to assess compliance with GCP regulations and data integrity, among other things;

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satisfactory completion of an FDA advisory committee review, if applicable; and

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FDA review and approval of the NDA, including consideration of the views on the FDA advisory committee, if one was involved, prior to any commercial marketing or sale of the drug in the United States.

Before testing any compound with potential therapeutic value in humans, the drug candidate enters the preclinical testing stage. Preclinical tests include laboratory evaluations of product chemistry, toxicity and formulation, as well as animal studies, to assess the potential safety and activity of the drug candidate. The conduct of the preclinical tests must comply with federal regulations and requirements including GLPs. The sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data, any available clinical data or literature and a proposed clinical protocol, to the FDA as part of the IND. An IND is an exemption from the FDCA that allows an unapproved product to be shipped in interstate commerce for use in an investigational clinical trial and a request for authorization from the FDA to administer an investigational drug product to humans. The central focus of an IND submission is on the general investigational plan and the protocol(s) for human trials. Some preclinical testing may continue even after the IND is submitted. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA raises concerns or questions regarding the proposed clinical trials and places the IND on clinical hold within that 30-day time period. In such a case, the

IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. The FDA may also impose complete or partial clinical holds on an IND for a drug candidate at any time before or during clinical trials due to safety concerns or non-compliance. If the FDA imposes a clinical hold, trials may not recommence without FDA authorization and then only under terms authorized by the FDA. Submission of a study protocol, therefore, may or may not result in FDA authorization to begin a clinical trial.

Clinical trials involve the administration of the drug candidate to healthy volunteers or patients under the supervision of qualified investigators, generally physicians not employed by or under the trial sponsor’s control, in accordance with GCPs, which include the requirement that all research participants provide their informed consent for their participation in any clinical trial. Clinical trials are conducted under protocols detailing, among other things, the objectives of the clinical trial, dosing procedures, subject selection and exclusion criteria and the parameters to be used to monitor subject safety and assess efficacy. Each protocol, and any subsequent amendments to the protocol, must be submitted to the FDA as part of the IND. Further, each clinical trial must be reviewed and approved by an independent IRB at or servicing each institution at which the clinical trial will be conducted. An IRB is charged with protecting the welfare and rights of trial participants and considers such items as whether the risks to individuals participating in the clinical trials are minimized and are reasonable in relation to anticipated benefits. The IRB also approves the form and content of the informed consent that must be signed by each clinical trial subject or his or her legal representative and must monitor the clinical trial until completed.

Information related to the investigational product, patient population, phase of investigation, study sites and investigators and other aspects of the clinical trial is made public as part of the U.S. registration of the clinical trial. Sponsors are also obligated to disclose the results of their clinical trials after completion. Disclosure of the results of these trials can be delayed in some cases for up to two years after the date of completion of the trial. Competitors may use this publicly available information to gain knowledge regarding the progress of development programs. Failure to timely register a covered clinical study or to submit study results as provided for in the law can give rise to civil monetary penalties and also prevent the non-compliant party from receiving future grant funds from the federal government.

Human clinical trials are typically conducted in three sequential phases that may overlap or be combined:

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Phase 1. The drug candidate is initially introduced into healthy human participants and tested for safety, dosage tolerance, absorption, metabolism, distribution and excretion, and the side effects associated with increasing doses and if possible, to gain early evidence of effectiveness. In the case of some products for severe or life-threatening diseases, especially when the product may be too inherently toxic to ethically administer to healthy volunteers, the initial human testing is often conducted in patients.

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Phase 2. The drug candidate is evaluated in a limited patient population to identify possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the product for specific targeted diseases or conditions and to determine dosage tolerance, optimal dosage and dosing schedule. Multiple Phase 2 clinical trials may be conducted to obtain information prior to beginning larger and more expensive Phase 3 clinical trials.

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Phase 3. The drug candidate is administered to an expanded patient population to further evaluate dosage and clinical efficacy at geographically dispersed clinical trial sites. These clinical trials are intended to establish the overall benefit/risk ratio of the product and provide an adequate basis for product approval. Generally, two adequate and well-controlled Phase 3 clinical trials are required by the FDA for approval of an NDA.

Post-approval studies, or Phase 4 clinical trials, may be conducted after initial marketing approval. These trials are used to gain additional experience from the treatment of patients in the intended therapeutic indication. In certain instances, the FDA may mandate the performance of Phase 4 clinical trials as a condition of approval of an NDA.

During the development of a new drug, sponsors are given opportunities to meet with the FDA at certain points. These points may be prior to submission of an IND, at the end of Phase 2, and before an NDA is submitted. Meetings at other times may be requested. These meetings can provide an opportunity for the sponsor to share information about the data gathered to date, for the FDA to provide advice, and for the sponsor and the FDA to reach agreement on the next phase of development. Sponsors typically use the meetings at the end of the Phase 2 trial to discuss Phase 2 clinical results and present plans for the pivotal Phase 3 clinical trials that they believe will support approval of the new drug.

CALC US Equity

CALC · 10-K · period ended 2023-12-31

Item 1. Business.

CALC US Equity☆

CALC · 10-K · period ended 2023-12-31

Item 1. Business.

CALC US Equity