Item 1A. Risk Factors

RISK FACTORS

You should carefully consider the risks and uncertainties described below and the other information in this report before making an investment in our common stock or warrants. Our business, financial condition, results of operations, or prospects could be materially and adversely affected if any of these risks occurs, and as a result, the market price of our common stock and warrants could decline and you could lose all or part of your investment. This report also contains forward-looking statements that involve risks and uncertainties. See “Cautionary Statement Regarding Forward-Looking Statements.” Our actual results could differ materially and adversely from those anticipated in these forward-looking statements as a result of certain factors, including those set forthbelow.

Risks Related to Our Business Operations and Financial Position

We have a limited operating history and have incurred significant losses since our inception and anticipate that we will continue to incur losses for the foreseeable future. If we ever achieve profitability, we may not be able to sustain it.

We are a clinical stage biopharmaceutical company with a limited operating history. Pharmaceutical product development is a highly speculative undertaking and involves a substantial degree of risk. Old AEON was originally incorporated in 2012 but did not begin focusing its efforts and financial resources on the clinical development and regulatory approval of ABP-450 for therapeutic indications until 2019. The operating history upon which investors must evaluate our business and prospects is limited. Consequently, any predictions about our future success, performance or viability may not be as accurate as they could be if we had a longer operating history or a history of commercial operations. In addition, as an organization, we have limited experience and have not yet demonstrated an ability to successfully overcome many of the risks and uncertainties frequently encountered by companies in the biopharmaceutical market. To date, we have not obtained any regulatory approvals for ABP-450 or generated any revenue from product sales relating to therapeutic uses of ABP-450.

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Because we have not yet received regulatory approvals, we are not permitted to market ABP-450 for therapeutic use in the United States or in any other territory, and as such, we have not generated any revenue from sales of ABP-450 to date. We have recorded losses from operations of $29.6 million, income of $29.6 million and loss of $48.4 million for the periods January 1, 2023 to July 21, 2023 (Predecessor), July 22, 2023 to December 31, 2023 (Successor) and for the year ended December 31, 2022, respectively; and we have net losses of $60.7 million, income of $24.0 million and loss of $52.6 million for the periods January 1, 2023 to July 21, 2023 (Predecessor), July 22, 2023 to December 31, 2023 (Successor) and for the year ended December 31, 2022, respectively. As a result of our ongoing losses, as of December 31, 2023 (Successor), we had an accumulated deficit of $473.6 million. We expect to continue to incur losses for the foreseeable future, and we anticipate these losses will increase as we continue to seek regulatory approval for, and begin to commercialize, ABP-450, if approved. We may encounter unforeseen expenses, difficulties, complications, delays and other unknown factors that may adversely affect our business. The size of our future net losses will depend, in part, on the rate of future growth of our expenses and our ability to generate revenues. Our prior losses and expected future losses have had and will continue to have an adverse effect on our stockholders’ equity (deficit) and working capital. Because of the numerous risks and uncertainties associated with drug development, we are unable to accurately predict the timing or amount of increased expenses, or when, if at all, we will be able to achieve profitability. Even if we achieve profitability in the future, we may not be able to sustain profitability in subsequent periods. Our prior losses, combined with expected future losses, may adversely affect the market price of common stock and our ability to raise capital and continue operations.

Our management has concluded that uncertainties around our ability to raise additional capital raise substantial doubt about our ability to continue as a going concern. We will require additional financing to fund our future operations. Any failure to obtain additional capital when needed on acceptable terms, or at all, could force us to delay, limit, reduce or terminate our operations.

We have concluded that we do not have sufficient cash to fund our operations and to meet our obligations as they become due within one year from the date that our consolidated financial statements are issued and as a result, there is substantial doubt about our ability to continue as a going concern. Our ability to continue as a going concern is an issue raised as a result of ongoing operating losses and a lack of financing commitments to meet cash requirements, and is subject to our ability to generate a profit or obtain appropriate financing from outside sources, including obtaining additional funding from the sale of our securities or obtaining loans from third parties where possible. We will need to raise additional capital to fund our operations. We cannot assure you that we will be able to raise additional capital on commercially reasonable terms or at all. The perception that we may not be able to continue as a going concern may materially limit our ability to raise additional funds through the issuance of new debt or equity securities or otherwise and no assurance can be given that sufficient funding will be available when needed to allow us to continue as a going concern. This perception may also make it more difficult to operate our business due to concerns about our ability to meet our contractual obligations. If we cannot continue as a going concern, we may have to liquidate our assets and may receive less than the value at which those assets are carried on our financial statements, and it is likely that our stockholders may lose some or all of their investment in us.

We expect that we will continue to expend substantial resources for the foreseeable future in order to complete development of and seek regulatory approval for ABP-450 for the treatment of migraine, cervical dystonia and gastroparesis, identify future potential therapeutic applications for ABP-450 and establish sales and marketing capabilities to commercialize ABP-450 across any approved indications.

We expect to have sufficient cash to fund our operating plan through June 2024, including $15 million of committed financing related to the issuance of certain Convertible Notes with Daewoong. For more information, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources.” We have based these estimates, however, on assumptions that may prove to be wrong, and we could spend our available capital resources much faster than we currently expect or require more capital to fund our operations than we currently expect. Our future capital requirements depend on many factors, including:

•the timing of, and the costs involved in, obtaining regulatory approvals for ABP-450 in our proposed therapeuticindications;

•the scope, progress, results and costs of researching and developing ABP-450, and conducting preclinical and clinical studies, including any determination we make as to whether to cease its migraine open label extensionstudy;

•the cost of commercialization activities if ABP-450 is approved in any of our proposed therapeutic indications for sale, including marketing, sales and distributioncosts;

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•costs under our third-party manufacturing and supply arrangements for ABP-450 and any products wecommercialize;

•the degree and rate of market acceptance of ABP-450 or any future approved products;

•the emergence, approval, availability, perceived advantages, relative cost, relative safety and relative efficacy of alternative and competing products;

•costs associated with any acquisition or in-license of products and product candidates, technologies or businesses, and the terms and timing of any strategic collaboration or other arrangement;

•the timing of our sale and issuance of the second Convertible Note in the principal amount of $10.0 million, pursuant to a subscription agreement (the “Subscription Agreement”), dated as of March 19, 2024, with Daewoong Pharmaceutical Co. Ltd. (“Daewoong”) relating to our sale and issuance of senior secured convertible notes (each, a “Convertible Note” and together, the “Convertible Notes”) in the principal amount of up to $15.0 million;

•the terms of any conversion of the first Convertible Note in the principal amount of $5.0 million, issued and sold to Daewoong on March 24, 2024, or the second Convertible Note into shares of common stock, subject to certain conditions and limitations set forth in each Convertible Note;

•the timing and terms of any liquidated damages cash payments under the separate termination agreements, dated as of March 18, 2024 (each, an “FPA Termination Agreement” and together, the “FPA Termination Agreements”), with each of ACM ARRT J LLC (“ACM”), and Polar Multi-Strategy Master Fund (“Polar”) (each of ACM and Polar, individually, a “Seller”, and together, the “Sellers”), terminating their respective Forward Purchase Agreements with us, dated as of June 29, 2023, for an OTC Equity Prepaid Transaction (each, a “Forward Purchase Agreement” and together, the “Forward Purchase Agreements”), which in certain circumstances may require aggregate payments of up to $3.0 million by us to the Sellers under the FPA Termination Agreements; and

•costs of operating as a public company.

If we raise additional capital through marketing and distribution arrangements or other collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish certain valuable rights to our product candidate(s), technologies, future revenue streams or research programs or may have to grant licenses on terms that may not be favorable to us. If we raise additional capital through public or private equity offerings or offerings of securities convertible into our equity, the ownership interest of stockholders will be diluted and the terms of any such securities may have a preference over our common stock. Debt financing, receivables financing and royalty financing may also be coupled with an equity component, such as warrants to purchase our capital stock, which could also result in dilution of our existing stockholders’ ownership, and such dilution may be material.

Additionally, if we raise additional capital through debt financing, we will have increased fixed payment obligations and may be subject to covenants limiting or restricting our ability to take specific actions, such as incurring additional debt or making capital expenditures to meet specified financial ratios, and other operational restrictions, any of which could restrict our ability to commercialize ABP-450 in our proposed therapeutic indications or to operate as a business and may result in liens being placed on our assets. If we were to default on any of our indebtedness, we could lose such assets. Additional funding may not be available on acceptable terms, or at all. The global credit and financial markets have experienced volatility and disruptions recently, including diminished liquidity and credit availability, declines in consumer confidence, declines in economic growth, increases in unemployment rates, and uncertainty about economic stability. If the equity and credit markets deteriorate, it may make any necessary debt or equity financing more difficult, more costly or more dilutive.

Our future success currently depends entirely on the successful and timely regulatory approval and commercialization of our only product candidate, ABP-450. The development and commercialization of pharmaceutical products is subject to extensive regulation, and we may not obtain regulatory approvals for ABP-450 in any of the indications for which we plan to develop it on a timely basis or at all.

Marketing approval of biologics in the United States requires the submission of a BLA to the FDA. A BLA must be supported by extensive clinical and preclinical data, as well as extensive information regarding pharmacology, chemistry, manufacturing and

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controls. FDA approval of a BLA is not guaranteed, and the review and approval process is an expensive and uncertain process that may take several years. The FDA also has substantial discretion in the approval process.

Prior to obtaining approval to commercialize any product candidate in the United States or abroad, we must demonstrate with substantial evidence from well-controlled clinical trials, and to the satisfaction of the FDA or comparable foreign regulatory authorities, that our product candidate, ABP-450, is safe and effective for its intended uses. Results from preclinical studies and clinical trials can be interpreted in different ways. Even if we believe that the preclinical or clinical data for our product candidates, including ABP-450, are promising, such data may not be sufficient to support approval for further development, manufacturing or commercialization of our product candidates by the FDA and other regulatory authorities. The FDA or other regulatory authorities may also require us to conduct additional preclinical studies or clinical trials for our product candidates either prior to or post-approval, or it may object to elements of our clinical development program, requiring their alteration. The number and types of preclinical studies and clinical studies that will be required for BLA approval varies depending on the product candidate, the disease or the condition that the product candidate is designed to treat and the regulations applicable to any particular product candidate.

The FDA, the EMA, and other regulatory authorities can delay, limit or deny approval of a product candidate for many reasons, including the following:

•a product candidate may not be deemed safe, effective, pure or potent;

•the data from preclinical studies and clinical studies may not be deemed sufficient;

•the FDA, the EMA and other regulatory agencies might not approve our third-party manufacturers’ processes or facilities;

•deficiencies in the formulation, quality control, labeling, or specifications of a product candidate or in response to citizen petitions or similar documents filed in connection with the product candidate;

•a general requirement intended to address risks associated with a class of drugs, such as a new risk evaluation and mitigation strategy, or REMS, requirement for botulinum toxins;

•the enactment of new laws or promulgation of new regulations that change the approval requirements; or

•the FDA, the EMA and other regulatory agencies may change their approval policies or adopt new regulations.

If ABP-450 fails to demonstrate safety and efficacy in our clinical studies or does not gain approval in any of our proposed therapeutic indications, our business and results of operations will be materially and adversely harmed.

We are currently pursuing three main therapeutic indications for ABP-450, and our business presently depends entirely on our ability to obtain regulatory approvals for ABP-450 for our planned indications and to successfully commercialize it in a timely manner. To date, as an organization, we have completed one clinical study related to the therapeutic use of ABP-450 for the treatment of cervical dystonia. In October 2023, we announced topline results from our Phase 2 clinical trial of ABP-450 for the preventive treatment of episodic migraine. The Phase 2 clinical trial for episodic migraine did not meet its primary endpoint, though it did show statistical significance on multiple secondary and exploratory endpoints, including the percentage of patients achieving a reduction from baseline of at least 50% in monthly migraine days and 75% in monthly migraine days during the weeks 21 to 24 of the treatment period and improvements on certain patient and rating scales.

We have no biological products currently approved for sale and we may never be able to develop marketable products. We are not permitted to market ABP-450 in the United States unless we receive approval of a BLA from the FDA, in the European Union unless we receive approval of a marketing authorization application, or MAA, from the EMA, in Canada unless we receive approval of a new drug submission, or NDS, from Health Canada or in any other countries permitted under the Daewoong Agreement, unless we receive the requisite approval from the applicable regulatory authorities in such countries. We will need to conduct a significant amount of clinical testing before we receive regulatory approval for any of our planned indications, and we do not know if or when we will receive any such approvals or whether we will need to make modifications or significant additional expenditures to obtain any such approvals. We can provide no assurances that ABP-450 will be successful in clinical studies or will ultimately receive regulatory approval in any therapeutic indication. Even if ABP-450 demonstrates efficacy, our injection protocols, including the selection of injection sites and amount of product injected at each injection site, may produce negative or inconclusive results or may result in the

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occurrence of serious adverse events. In addition, if we receive approval in one country for an indication, we may not receive a similar approval in any other jurisdiction, or in the same country for a different indication.

Even if regulatory approvals for one or more of our therapeutic indications are obtained, we may never be able to successfully commercialize ABP-450. We will need to transition at some point from a company with a development focus to a company capable of supporting commercial activities, including by obtaining approval for coverage and adequate reimbursement from third-party and government payors, but we may not be successful in such a transition. Accordingly, we may not be able to generate sufficient revenue through the sale of ABP-450 in each of our therapeutic indications to continue our business.

Clinical product development involves a lengthy, expensive and uncertain process. We may incur greater costs than we anticipate or encounter substantial delays or difficulties in our clinical studies.

We may not commercialize, market, promote or sell any product candidate without obtaining marketing approval from the FDA, the EMA or other regulatory agencies, and we may never receive such approvals.

Clinical testing is expensive, is difficult to design and implement, can take many years to complete and is uncertain as to outcome. As a company, we are conducting and overseeing the conduct of preclinical and clinical studies of ABP-450 through contracts with CROs. We cannot guarantee that any clinical studies will be conducted as planned or completed on schedule, if at all. A failure of one or more clinical studies can occur at any stage of testing. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that have believed their product candidates performed satisfactorily in preclinical studies and clinical studies have nonetheless failed to obtain marketing approval of their products.

In October 2023, we announced topline results from our Phase 2 clinical trial of ABP-450 for the preventive treatment of episodic migraine. The Phase 2 clinical trial for episodic migraine did not meet its primary endpoint, though it did show statistical significance on multiple secondary and exploratory endpoints, including the percentage of patients achieving a reduction from baseline of at least 50% in monthly migraine days and 75% in monthly migraine days during the weeks 21 to 24 of the treatment period and improvements on certain patient and rating scales.

We may experience numerous unforeseen events prior to, during, or as a result of, clinical studies that could delay or prevent our ability to receive marketing approval or to commercialize ABP-450 in our proposed therapeutic indications, including the following:

•delays in reaching a consensus with regulatory authorities on the design or implementation of our clinical studies;

•regulators or institutional review boards and ethics committees may not authorize us or our investigators to commence a clinical study or conduct a clinical study at a prospective study site;

•delays in reaching agreement on acceptable terms with prospective CROs and clinical study sites;

•delays or failures by Daewoong to comply with cGMPs or other applicable requirements, or to provide sufficient supply of ABP-450 for use in our clinical studies;

•the number of patients required for clinical studies of ABP-450 in our proposed therapeutic indications may be larger than we anticipate, enrollment in these clinical studies may be slower than we anticipate, participants may drop out of these clinical studies at a higher rate than we anticipate or fail to return for post-treatment follow-up or we may fail to recruit suitable patients to participate in a study;

•clinical studies of ABP-450 in our proposed therapeutic indications may produce negative or inconclusive results;

•imposition of a clinical hold by regulatory authorities as a result of a serious adverse event, concerns with a class of product candidates or after an inspection of our clinical study operations, study sites or manufacturing facilities;

•occurrence of serious adverse events associated with ABP-450 in any of our proposed therapeutic indications that are viewed to outweigh its potential benefits;

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•changes in regulatory requirements and guidance that require amending or submitting new clinical protocols;

•we may decide, or regulators may require us, to conduct additional clinical studies or abandon product development programs; or

•the impacts of any public health outbreaks (such as the COVID-19 pandemic) on our ongoing and planned clinical studies.

Any inability to successfully complete preclinical and clinical development could result in additional costs to us or impair our ability to generate revenue from future product sales or other sources. In addition, if we make manufacturing or formulation changes to ABP-450, we may need to conduct additional testing to bridge our modified product candidate to earlier versions. Clinical study delays could also shorten any periods during which we may have the exclusive right to commercialize ABP-450, if approved in any currently proposed or future therapeutic indications, or allow our competitors to bring competing products to market before we do, which could impair our ability to successfully commercialize ABP-450 and may harm our business, financial condition, results of operations and prospects.

Additionally, if the results of our clinical studies are inconclusive or if there are safety concerns or serious adverse events associated with ABP-450 in any of our proposed therapeutic indications, we may:

•be delayed in obtaining marketing approval, or not obtain marketing approval at all;

•obtain approval for indications or patient populations that are not as broad as intended or desired;

•obtain approval with labeling that includes significant use or distribution restrictions or safety warnings or be subject to the addition of labeling statements, such as warnings or contraindications;

•be subject to additional post-marketing testing requirements;

•be required to perform additional clinical studies to support approval or be subject to additional post- marketing testing requirements;

•have regulatory authorities withdraw, or suspend, their approval of the product or impose restrictions on its distribution in the form of a REMS;

•be sued; or

•experience damage to our reputation.

Our product development costs will also increase if we experience delays in testing or obtaining marketing approvals. We do not know whether any of our preclinical studies or clinical studies will begin as planned, need to be restructured or be completed on schedule, if at all. Additionally, the impacts of any public health outbreaks (such as the COVID-19 pandemic) on our projected milestones is uncertain and cannot be predicted with confidence.

Further, we, the FDA, a foreign regulatory authority, an ethics committee or an institutional review board may suspend our clinical studies at any time if it appears that we or our collaborators are failing to conduct a study in accordance with regulatory requirements, including the FDA’s current Good Clinical Practice, or GCP, regulations, that we are exposing participants to unacceptable health risks, or if the FDA, the EMA or other regulatory agency finds deficiencies in our investigational new drug applications, or INDs, or clinical study applications, respectively, or the conduct of these studies. Moreover, to the extent our filing schedule for a new IND is dependent on further preclinical or manufacturing progress, we may not be able to file such INDs on the timelines we expect. Therefore, we cannot predict with any certainty the schedule for commencement and completion of future clinical studies. If we experience delays in the commencement or completion of our clinical studies, or if we terminate a clinical study prior to completion, the commercial prospects of ABP-450 could be negatively impacted, and our ability to generate revenue from ABP-450 may be delayed.

Additionally, certain of our scientific advisors or consultants who receive compensation from us are likely to be investigators for our future clinical studies. Under certain circumstances, we may be required to report some of these relationships to the FDA. The FDA may conclude that a financial relationship between us and a principal investigator has created a conflict of interest or otherwise affected interpretation of the study. The FDA may therefore question the integrity of the data generated at the applicable clinical study site and the utility of the clinical study itself may be jeopardized. This could result in a delay in approval, or rejection, of our

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marketing applications by the FDA and may ultimately lead to the denial of marketing approval of ABP-450 in one or more indications. If we experience delays in the completion of, or termination of, any clinical study of ABP-450, the commercial prospects of ABP-450 will be harmed, and our ability to generate product revenue will be delayed. Moreover, any delays in completing our clinical studies will increase our costs, slow down our development and approval process and jeopardize our ability to commence product sales and generate revenues which may harm our business, financial condition and prospects significantly.

Enrollment and retention of patients in clinical studies is an expensive and time-consuming process and could be delayed, made more difficult or rendered impossible by multiple factors outside our control. If we experience delays or difficulties in enrolling patients in clinical studies, our receipt of necessary regulatory approval could be delayed or prevented.

Identifying and qualifying patients to participate in our clinical studies is critical to our success. The number of patients suffering from cervical dystonia is small and other indications we may pursue may have similarly small patient populations. We may encounter difficulties in enrolling patients in our clinical studies and may compete against other clinical studies for the same pool of potential patients, thereby delaying or preventing development and approval of ABP-450 in any of our proposed therapeutic indications. For example, the activation of investigators and sites for our migraine prevention Phase 2 clinical study was initially slower than we expected. Even once enrolled, we may be unable to retain a sufficient number of patients to complete any of our studies on a timely basis or at all. Patient enrollment and retention in clinical studies depends on many factors, including the size of the patient population, the nature of the study protocol, the existing body of safety and efficacy data, the number and nature of competing treatments and ongoing clinical studies of competing therapies for the same indication, the proximity of patients to clinical study sites, the eligibility criteria for the study and other factors we may not be able to control that may limit patients, principal investigators or staff or clinical site availability.

Our clinical studies were, and may in the future be, affected by the COVID-19 pandemic or similar occurrences. For example, the COVID-19 pandemic caused us to delay enrollment in 2020 to institute new procedures for the safety of patients and investigators and may in the future further impact patient enrollment in our ongoing clinical studies.

Further, if patients drop out of our clinical studies, miss scheduled doses or follow-up visits, or otherwise fail to follow clinical study protocols, whether as a result of a public health outbreak or otherwise, the integrity of data from our clinical studies may be compromised or not accepted by the FDA or other regulatory authorities, which would represent a significant setback for the applicable program.

Our efforts to build relationships with patient communities may not succeed, which could result in delays in patient enrollment in our clinical studies. Any negative results we may report in clinical studies of ABP-450 in any of our proposed therapeutic indications may make it difficult or impossible to recruit and retain patients in other clinical studies of that same product candidate. Delays or failures in planned patient enrollment or retention, whether as a result of a public health outbreak or otherwise, may result in increased costs, program delays or both, which could have a harmful effect on our ability to develop ABP-450 in any of our proposed therapeutic indications or could render further development impossible. In addition, we may rely on CROs and clinical study sites to ensure proper and timely conduct of our future clinical studies and, while we intend to enter into agreements governing their services, we will be limited in our ability to ensure their actual performance.

ABP-450 may cause undesirable side effects or have other properties that could delay or prevent its regulatory approval in any of our proposed therapeutic indications, limit its commercial potential or result in significant negative consequences following any potential marketing approval.

During the conduct of clinical studies, patients report changes in their health, including illnesses, injuries and discomforts, to their doctor. Often, it is not possible to determine whether or not the product candidate being studied caused or contributed to these conditions and regulatory authorities may draw different conclusions from us and require additional testing to confirm these determinations, if they occur. We are collecting data about ABP-450 from ongoing clinical and toxicology studies and any adverse events or undesirable side effects caused by, or other unexpected properties of, ABP-450 could cause us, any future collaborators, an Institutional Review Board, or IRB, or ethics committee or regulatory authorities to interrupt, delay or halt clinical studies of ABP-450 and could result in a more restrictive label or the delay or denial of regulatory approval by the FDA or other regulatory authorities.

In addition, it is possible that as we test ABP-450 in larger, longer and more extensive clinical studies, or as use of ABP-450 becomes more widespread if it receives regulatory approval for any of our proposed indications, that illnesses, injuries, discomforts

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and other adverse events that were not observed in earlier studies conducted by us, or, in the case of ABP-450, by others using the same botulinum toxin, as well as conditions that did not occur or went undetected in previous studies, will be reported by subjects or patients. Many times, side effects are only detectable after investigational products are tested in large-scale pivotal studies or, in some cases, after they are made available to patients on a commercial scale after approval. If additional clinical experience indicates that ABP-450 has side effects or causes serious or life-threatening side effects in any of our proposed therapeutic indications, the development of ABP-450 in that indication may fail or be delayed. Additionally, there is the risk that as botulinum toxins other than ABP-450 are approved for and studied in connection with a broader range of diseases and conditions and across a more diverse population, additional safety signals and other adverse events may be identified. All botulinum toxin products are required to include a class labeling that contains a boxed warning related to safety and we could be required to include additional warnings on our product labeling, if approved.

If ABP-450 receives regulatory approval, and we or others identify undesirable side effects of ABP-450, a number of potentially significant negative consequences could result, such as regulatory authorities revoking such approval or imposing additional restrictions on the marketing and promotion of the product, or we may be required to recall the product or implement changes to the way the product is administered.

We could also be sued and held liable for harm caused to patients, which could hinder commercial acceptance of ABP-450 and adversely affect our business, financial condition, results of operations and prospects.

Results of other parties’ clinical studies involving the same or a nearly identical botulinum toxin complex as ABP-450, or results in any preclinical studies we conduct, may not be predictive of future results of our clinical studies.

Success in clinical studies conducted by Daewoong and Evolus, Inc., or Evolus, involving a botulinum toxin that is identical or nearly identical to ABP-450 does not ensure that any clinical studies we conduct using ABP-450 will be successful and we will still need to submit our independently generated data to applicable regulatory agencies to support regulatory approval of ABP-450 in any of our proposed therapeutic indications. Similarly, success in any preclinical studies or clinical studies that we conduct will not ensure that later clinical studies will be successful. A number of companies in the biotechnology and pharmaceutical industries have suffered significant setbacks in clinical studies, even after positive results in earlier preclinical studies and earlier clinical studies. These setbacks have been caused by, among other things, preclinical findings made while clinical studies were underway and safety or efficacy observations made in clinical studies, including previously unreported adverse events. Notwithstanding any potential promising results in earlier studies, we cannot be certain that we will not face similar setbacks.

Additionally, our clinical studies may utilize an “open-label” trial design. An “open-label” clinical trial is one where both the patient and investigator know whether the patient is receiving the investigational product candidate for either an existing approved drug or placebo. Most typically, open-label clinical studies test only the investigational product candidate and may do so at different dose levels. Open-label clinical studies are subject to various limitations that may exaggerate any therapeutic effect as patients in open-label clinical studies are aware when they are receiving treatment. Open-label clinical studies may be subject to a “patient bias” where patients perceive their symptoms to have improved merely due to their awareness of receiving an experimental treatment. In addition, open-label clinical studies may be subject to an “investigator bias” where those assessing and reviewing the physiological outcomes of the clinical studies are aware of which patients have received treatment and may interpret the information of the treated group more favorably given this knowledge. The results from an open-label trial may not be predictive of future clinical trial results with any of our product candidates when studied in a controlled environment with a placebo or active control.

Interim, topline or preliminary data from our clinical studies that we may announce or publish from time to time may change as more patient data become available and are subject to audit and verification procedures that could result in material changes in the final data.

From time to time, we may publicly disclose interim, topline or preliminary data from our clinical studies as we are expecting to do with the chronic cohort of our Phase 2 migraine study in the second quarter of 2024, which are based on a preliminary analysis of then-available data, and the results and related findings and conclusions are subject to change following a full analysis of all data related to the particular study. Interim and preliminary data for the studies we may complete are subject to the risk that one or more clinical outcomes may materially change as patient enrollment continues or more patient data become available. We also make assumptions, estimations, calculations and conclusions as part of our analyses of data, and we may not have received or had the opportunity to fully and carefully evaluate all data. Interim, topline and preliminary data also remains subject to audit and verification

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procedures that may result in the final data being materially different from the preliminary data previously published. As a result, the interim, topline, or preliminary results that we report may differ from future results of the same trials, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated, and any interim, topline or preliminary data should be viewed with caution until final data is available. Material adverse changes in the final data could result in significant harm to our business prospects.

Further, others, including regulatory agencies, may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact the value of the particular program, the approvability or commercialization of our product candidate or product and our company in general. In addition, the information we choose to publicly disclose regarding a particular study or clinical study is based on what is typically extensive information, and you or others may not agree with what we determine is the material or otherwise appropriate information to include in our disclosure, and any information we determine not to disclose may ultimately be deemed significant with respect to future decisions, conclusions, views, activities or otherwise regarding a particular pharmaceutical or biological product, pharmaceutical or biological product candidate or our business. If the interim, topline or preliminary data that we report differ from actual results, or if others, including regulatory authorities, disagree with the conclusions reached, our ability to obtain approval for and commercialize our product candidate in any currently proposed or future therapeutic indications may be harmed, which could harm our business, operating results, prospects or financial condition.

Due to our limited resources and access to capital, we must prioritize development of certain therapeutic uses of ABP-450; these decisions may prove to be wrong and may adversely affect our business.

While our initial focus is on the development and approval of ABP-450 for the treatment of migraine, cervical dystonia and gastroparesis, a key element of our strategy is to identify additional conditions for which ABP-450 may be an effective therapy. However, there can be no assurances that we will be successful in identifying such conditions. Even if we are successful in identifying such conditions, we may experience difficulties in identifying a proper treatment regimen, or we may fail to secure regulatory approval for a particular indication. If we are unable to gain regulatory approval for indications in addition to the indications for the treatment of migraine, cervical dystonia and gastroparesis on which we are currently focused, or if FDA or other regulatory agencies require us to pursue a narrower indication than we have currently identified, we may be limited in our ability to grow our business.

Efforts to identify and pursue additional therapeutic uses of ABP-450 require substantial technical, financial and human resources, regardless of whether they are ultimately successful. Because we have limited financial and personnel resources, we may forgo or delay pursuit of opportunities with potential target indications that later prove to have greater commercial potential or a greater likelihood of success. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. We may focus our efforts and resources on potential therapeutic uses of ABP-450 that ultimately prove to be unsuccessful.

We may not be successful in obtaining an original BLA that contemplates exclusively therapeutic uses of ABP-450.

In order to market a biological product, an entity must submit and receive approval of a BLA. When a BLA application is approved in the first instance, it is an “original BLA” which is assigned a BLA number by the FDA. An approved “original BLA” may be supplemented, or amended, to incorporate changes, such as new indications, which the FDA must also approve. A BLA holder is legally responsible for all regulatory obligations associated with the BLA, including each supplement thereto, and is the only party that is authorized to submit a supplement. The form of BLA, original versus a supplement, is important because payors will generally consider the pricing for all products falling under the same BLA together when calculating reimbursement rates. Existing botulinum toxins, including Botox, are approved under a single BLA for both therapeutic and cosmetic indications. As a result, when payors calculate the average selling price, or ASP, of other botulinum toxins they include the sales prices of both therapeutic and cosmetic sales. The inclusion of a lower cosmetic sales price in the calculation of the ASP can cause physicians to lose money when treating patients with existing botulinum toxins and also creates a deterrent to providing payors and/or providers with rebates or other financial incentives.

Part of our regulatory strategy includes pursuing an original BLA that contemplates exclusively therapeutic uses of ABP-450. We are aware that Evolus has obtained a BLA for cosmetic indications of its Jeuveau product, which is substantially similar to ABP-450. However, given we are a separate legal entity from Evolus, we do not hold a BLA that could be supplemented to add our target indications. As such, we believe the filing of an original BLA for ABP-450 is the appropriate path for approval and, by filing an

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original BLA, we can limit it to exclusively therapeutic uses. If we are successful in obtaining an original BLA for therapeutic indications of ABP-450, we believe the ASP for ABP-450 would be calculated using only therapeutic sales, which should facilitate consistent and favorable reimbursement to physicians when they choose to use ABP-450 for therapeutic treatments, as well as our ability to provide payors and/or providers with rebates and other financial incentives. However, we cannot assure you that we will be able to obtain such a BLA, and we are aware of other companies that sell botulinum toxins for both therapeutic and aesthetic indications that have experienced regulatory issues and denials by the FDA that led them to abandon the approach of applying for separate original BLAs that would cover the separate markets. We believe these denials occurred, in part, because in those instances the applicant already possessed a BLA for the product in a different indication. In the event we are not able to obtain an original BLA, we may not be able to ensure the consistent pricing that we believe an original BLA would offer, and the anticipated ASP of our products could be adversely affected.

Even if ABP-450 receives regulatory approval for any of our proposed indications, it may fail to achieve the broad degree of market acceptance by physicians, patients, third-party payors and others in the medical community necessary for commercial success.

Even if ABP-450 receives marketing approval for one or more therapeutic indications, it may nonetheless fail to gain sufficient market acceptance by physicians, patients, third-party payors and others in the medical community for those indications. The commercial success of ABP-450, if approved in any currently proposed or future therapeutic indications, will depend significantly on the broad adoption and use of the resulting product by physicians for approved indications. The degree of market acceptance of any product candidate, if approved for commercial sale, will depend on a number of factors, including but not limited to:

•the convenience and ease of administration compared to alternative treatments and therapies;

•the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies;

•the efficacy and potential advantages compared to alternative treatments and therapies;

•the availability of third-party coverage and adequate reimbursement, and patients’ willingness to pay out-of-pocket in the absence of third-party coverage or adequate reimbursement;

•the effectiveness of sales and marketing efforts;

•the strength of our relationships with patient communities;

•the timing of market introduction of our product candidate in relation to other potentially competitive products;

•the cost of treatment in relation to alternative treatments and therapies;

•the amount of upfront costs or training required for physicians to administer our product candidate;

•our ability to offer such product for sale at competitive prices;

•the strength of marketing and distribution support;

•the presence or perceived risk of potential product liability claims;

•the prevalence and severity of any side effects; and

•any restrictions on the use of the product together with other medications.

Our efforts to educate physicians, patients, third party payors and others in the medical community on the benefits of our product candidates, if approved, may require significant resources and may never be successful.

If ABP-450 fails to gain market acceptance, this will have a material adverse impact on our ability to generate revenues to provide a satisfactory, or any, return on our investments. Even if some therapeutic indications achieve market acceptance, the market may prove not to be large enough to allow us to generate significant revenues.

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Even if we receive regulatory approval for ABP-450 in any therapeutic indication, we will be subject to ongoing regulatory obligations and continued regulatory review, which may result in significant additional expense, limit or delay additional regulatory approvals, limit or prohibit commercial distribution, prevent continued investigation and research and subject us to penalties if we fail to comply with applicable regulatory requirements. Additionally, ABP-450, if approved in any therapeutic indication, could be subject to labeling and other restrictions and market withdrawal and we may be subject to penalties if we fail to comply with regulatory requirements or experience unanticipated problems with our products.

If regulatory approval is granted, ABP-450 will be subject to continual regulatory review by the FDA, the EMA and other similar regulatory authorities. Any regulatory approvals that we or our current or future collaborators receive for ABP-450 in any currently proposed or future therapeutic indication may also be subject to limitations on the approved indications for which the product may be marketed or to the conditions of approval, or such approvals may contain requirements for potentially costly post-marketing testing, including Phase IV clinical studies, and surveillance to monitor the safety and efficacy of the product. In addition, if the applicable regulatory agency approves ABP-450 in any therapeutic indication, the manufacturing processes, labeling, packaging, distribution, adverse event reporting, storage, advertising, promotion and recordkeeping for the product will be subject to extensive and ongoing regulatory requirements. These requirements include submissions of safety and other post-marketing information and reports and registration, as well as continued compliance with cGMP requirements and GCPs, for any clinical studies that we conduct post-approval. Later discovery of previously unknown problems with ABP-450, including adverse events of unanticipated severity or frequency, or with our third-party manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may result in, among other things:

•the imposition of restrictions on the marketing or manufacturing of the product, suspension or withdrawal of product approvals or revocation of necessary licenses;

•the issuance of warning letters, show cause notices or untitled letters describing alleged violations, which may be publicly available;

•mandated modifications to promotional materials or a requirement to provide corrective information to healthcare practitioners;

•required revisions to the labeling, including limitation on approved uses or the addition of additional warnings, contraindications or other safety information;

•a requirement to enter into a consent decree, which can include imposition of various fines, reimbursements for inspection costs, required due dates for specific actions and penalties for noncompliance;

•the commencement of criminal investigations and prosecutions;

•the suspension of any ongoing clinical studies;

•a delay in approving or a refusal to approve pending applications or supplements to approved applications filed by us;

•a refusal to permit products or active ingredients to be imported or exported to or from the United States or other applicable jurisdictions;

•a suspension of operations or the imposition of restrictions on operations, including costly new manufacturing requirements;

•a seizure or detention of products or a requirement that we initiate a product recall; and

•injunctions or the imposition of civil or criminal penalties.

Additionally, if ABP-450 receives marketing approval for any of our proposed indications, the FDA could require us to adopt a REMS to ensure that the benefits of the therapy outweigh its risks, which may include, among other things, a medication guide outlining the risks for distribution to patients and a communication plan to health care practitioners. Authorities in other jurisdictions also may take similar actions. Any of these events could prevent us from achieving or maintaining market acceptance of ABP-450 in the proposed therapeutic indications and could significantly harm our business, prospects, financial condition and results of operations.

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Regulatory policies may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of ABP-450 in any of our proposed therapeutic indications. We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action, either in the United States or abroad. If we are slow to or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and we may not achieve or sustain profitability, which would adversely affect our business, prospects, financial condition and results of operations.

In addition, given the similarity of ABP-450 to Jeuveau, any adverse developments with respect to Jeuveau, including adverse events or changes in regulatory status, may also directly impact the development, commercialization or regulation of ABP-450, if approved.

Even if we receive marketing approval, coverage and adequate reimbursement may not be available for ABP-450 in any currently proposed or future therapeutic indications, which could make it difficult for us to sell the product profitably.

Market acceptance and sales of ABP-450, if approved, will depend in part on the extent to which reimbursement for the product and related treatments will be available from third-party payors, including government health administration authorities, managed care organizations and other private health insurers.

Obtaining coverage and adequate reimbursement approval for a product from a government or other third-party payor is a time-consuming and costly process that could require us to provide supporting scientific, clinical and cost-effectiveness data for the use of our products to the payor.

Third-party payors decide which therapies they will pay for and establish reimbursement levels. While no uniform policy for coverage and reimbursement exists in the United States, third-party payors often rely upon Medicare coverage policy and payment limitations in setting their own coverage and reimbursement policies. However, decisions regarding the extent of coverage and amount of reimbursement to be provided for ABP-450 will be made on a payor-by-payor basis. Therefore, one payor’s determination to provide coverage for a product does not assure that other payors will also provide coverage, and adequate reimbursement, for the product or any related treatments. Additionally, a third-party payor’s decision to provide coverage for a therapy does not imply that an adequate reimbursement rate will be approved. Each payor determines whether or not it will provide coverage for a therapy, what amount it will pay the manufacturer for the therapy and on what tier of its formulary it will be placed. The position on a payor’s list of covered drugs and biological products, or formulary, generally determines the co-payment that a patient will need to make to obtain the therapy and can strongly influence the adoption of such therapy by patients and physicians. Patients who are prescribed treatments for their conditions and providers prescribing such services generally rely on third-party payors to reimburse all or part of the associated healthcare costs. Patients are unlikely to use our products unless coverage is provided and reimbursement is adequate to cover a significant portion of the cost of our products. In addition, because certain of our proposed indications of ABP-450 will require the product to be physician-administered, separate reimbursement for the product itself may or may not be available. Instead, the administering physician may only be reimbursed for providing the treatment or procedure in which our product is used.

There may be significant delays in obtaining such coverage and reimbursement for newly approved products, and coverage may be more limited than the purposes for which the product is approved by the FDA. Moreover, eligibility for coverage and reimbursement does not imply that a product will be paid for in all cases or at a rate that covers our costs, including research, development, intellectual property, manufacture, sale and distribution expenses. Interim reimbursement levels for new products, if applicable, may also not be sufficient to cover our costs and may not be made permanent. Reimbursement rates may vary according to the use of the product and the clinical setting in which it is used, may be based on reimbursement levels already set for lower cost products and may be incorporated into existing payments for other services. Net prices for products may be reduced by mandatory discounts or rebates required by government healthcare programs or private payors, by any future laws limiting pharmaceutical prices and by any future relaxation of laws that presently restrict imports of product from countries where they may be sold at lower prices than in the United States.

Third-party payors have attempted to control costs by limiting coverage and the amount of reimbursement for particular medications. We cannot be sure that coverage and reimbursement will be available for any product that we commercialize and, if reimbursement is available, what the level of reimbursement will be. Inadequate coverage and reimbursement may impact the demand for, or the price of, any product for which we obtain marketing approval. If coverage and adequate reimbursement are not available, or are available only at limited levels, we may not be able to successfully commercialize ABP-450.

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Outside the United States, international operations are generally subject to extensive governmental price controls and other market regulations, and we believe a continued emphasis on cost containment initiatives in Europe, Canada and other countries could continue to put pressure on the pricing and usage of our product candidates. In many countries, the prices of medical products are subject to varying price control mechanisms as part of national health systems. Other countries allow companies to fix their own prices for medical products, but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the amount that we are able to charge for our product candidates. Accordingly, in markets outside the United States, the reimbursement for our products may be reduced compared with the United States and may be insufficient to generate commercially reasonable revenue and profits.

The delivery of health care in the European Union, including the establishment and operation of health services and the pricing and reimbursement of medicines, is almost exclusively a matter for national, rather than European Union, law and policy. National governments and health service providers have different priorities and approaches to the delivery of healthcare and the pricing and reimbursement of products in that context. In general, however, the health care budgetary constraints in most European Union member states have resulted in restrictions on the pricing and reimbursement of medicines by relevant health service providers. Coupled with ever increasing European Union and national regulatory burdens on those wishing to develop and market products, this could prevent or delay marketing approval of our product candidates, restrict or regulate post approval activities and affect our ability to commercialize any products for which we obtain marketing approval.

Moreover, increasing efforts by governmental and third party payors in the European Union, the United States and other jurisdictions to cap or reduce health care costs may cause such organizations to limit both coverage and the level of reimbursement for newly approved products and, as a result, they may not cover or provide adequate payment for our product candidates. We expect to experience pricing pressures in connection with the sale of any of our product candidates due to the trend toward managed health care, the increasing influence of health maintenance organizations and additional legislative changes. The downward pressure on health care costs in general, particularly prescription drugs and surgical procedures and other treatments, has become very intense. As a result, increasingly high barriers are being erected to the entry of new products.

ABP-450, if approved in any currently proposed or future therapeutic indications, will face significant competition and our failure to effectively compete may prevent us from achieving significant market penetration and expansion.

The pharmaceutical industry is highly competitive and requires an ongoing, extensive search for technological innovation. It also requires, among other things, the ability to effectively discover, develop, test and obtain regulatory approvals for novel products, as well as the ability to effectively commercialize, market and promote approved products, including communicating the effectiveness, safety and value of products to actual and prospective customers and medical professionals. Numerous companies are engaged in the development, manufacture and marketing of products competitive with those that we are developing.

Our primary competitors for ABP-450 in the injectable botulinum toxin pharmaceutical market for therapeutic use are:

•Botox, which is marketed by Allergan, and since its original approval by the FDA in 1989 has been approved for multiple therapeutic indications, including migraine, cervical dystonia, upper and lower limb spasticity, strabismus, blepharospasm, overactive bladder, axillary hyperhidrosis, neurogenic detrusor overactivity and overactive bladder, and which is currently studying its botulinum toxin for therapeutic indications of atrial fibrillation;

•Dysport, which is marketed by Ipsen Ltd. As an injectable botulinum toxin for the therapeutic indications of cervical dystonia and upper and lower limb spasticity, and which is currently studying its botulinum toxin for therapeutic indications of neurogenic detrusor overactivity;

•Xeomin, which is marketed by Merz Pharmaceuticals, LLC as an injectable botulinum toxin for the therapeutic indications of cervical dystonia, blepharospasm, chronic sialorrhea and upper limb spasticity; and

•Revance Therapeutics, Inc., or Revance, which is currently studying, preparing BLA submissions for and/or has received approval for, its injectable botulinum toxin, daxibotulinumtoxinA, for the therapeutic indications of cervical dystonia and adult upper limb spasticity, and which has also entered into a collaboration and license agreement with Viatris Inc. to develop and commercialize a biosimilar to Botox.

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We are also aware of competing botulinum toxins currently being developed or commercialized in the United States, European Union, Asia, South America and other markets. While some of these products may not meet United States regulatory standards, the companies operating in these markets may be able to produce products at a lower cost than United States and European manufacturers. In addition to the injectable botulinum toxin dose forms, we are aware that other companies are developing topical botulinum toxins for therapeutic indications. We will also face competition in our target therapeutic markets from other pharmaceutical products.

For the treatment of cervical dystonia, in addition to other injectable botulinum toxins, we will face competition from orally administered anticholinergic, GABA receptor agonist, benzodiazepine, dopaminergic and anticonvulsant pharmaceuticals. For the treatment of migraine, we will face competition from calcitonin gene-related peptide agonists, or CGRPs, including Aimovig (erenumab) marketed by Amgen Inc., Ajovy (fremenezumab) marketed by Teva Pharmaceutical Industries Ltd., and Emgality (galcenezumab) marketed by Eli Lilly and Company, as well as certain orally administered anti-epileptic, beta-blocker and triptan pharmaceuticals. The FDA has also accepted a New Drug Application for vazegepant, marketed by Pfizer Inc., to be used as an intranasal formulation for both the acute treatment and prevention of migraine. For the treatment of gastroparesis, we will face competition from prokinetic agents, including REGLAN (metoclopramide), which is the only medication currently approved by FDA for the treatment of gastroparesis. Many of our competitors have greater financial and other resources than we have. This enables them, among other things, to leverage their financial resources to make greater R&D, marketing and promotion investments than us. Our competitors may also have more experience and expertise in obtaining marketing approvals from the FDA and other regulatory authorities. Our technologies and products may be rendered obsolete or uneconomical by technological advances or entirely different approaches developed by one or more of our competitors. For example, Revance has published data related to the treatment of cervical dystonia that indicates that its botulinum toxin may have a duration of effect of at least 24 weeks, which may compare favorably to the duration of effect of ABP-450. As more companies develop new intellectual property in our markets, the possibility of a competitor acquiring patent or other rights that may limit our products or potential products increases, which could lead to litigation. In addition to product development, testing, approval and promotion, other competitive factors in the pharmaceutical industry include industry consolidation, product quality and price, product technology, reputation, customer service and access to technical information.

If approved, ABP-450 may face competition sooner than anticipated.

With the enactment of the Biologics Price Competition and Innovation Act of 2009, or the BPCIA, as part of the Patient Protection and Affordable Care Act, an abbreviated pathway for the approval of biological products that are biosimilar to or interchangeable with an FDA-licensed reference biological product was created. The abbreviated regulatory pathway establishes legal authority for the FDA to review and approve biosimilar biologics. Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years following the date that the reference product was first licensed by the FDA. In addition, the approval of a biosimilar product may not be made effective by the FDA until twelve years from the date on which the reference product was first licensed. During this twelve-year period of exclusivity, another company may still market a competing version of the reference product if the FDA approves a full BLA for the competing product containing the sponsor’s own preclinical data and data from adequate and well-controlled clinical studies to demonstrate the safety, purity and potency of their product. The law is complex and is still being interpreted and implemented by the FDA. As a result, its ultimate impact, implementation, and meaning are subject to uncertainty. While it is uncertain when such processes intended to implement the BPCIA may be fully adopted by the FDA, any such processes could have a material adverse effect on the future commercial prospects for our biological products.

We have not determined whether ABP-450 would qualify for the twelve-year period of exclusivity based on submission of an original BLA, a shorter period or any exclusivity at all. Even if we are able to obtain separate twelve-year exclusivity, or a shorter exclusivity period, there is a risk that any exclusivity could be shortened due to congressional action or otherwise, that the FDA attempts to adopt an alternate interpretation of law that precludes exclusivity, or that the FDA will not consider ABP-450 to be a reference product for competing products, potentially creating the opportunity for competition sooner than anticipated. Moreover, the extent to which a biosimilar product, once approved, will be substituted for any one of our reference products in a way that is similar to traditional generic substitution for non-biological products is not yet clear and will depend on a number of marketplace and regulatory factors that are still developing. If we are unable to obtain an original BLA, and ABP-450 receives a supplemental BLA, we would not qualify for the exclusivity period.

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If we are unable to establish sales and marketing capabilities on our own or through third parties, we will be unable to successfully commercialize ABP-450, if approved in any proposed therapeutic indication, or generate product revenue.

We do not have a sales or marketing infrastructure and have little experience in the sale, marketing, or distribution of pharmaceutical products. To successfully commercialize ABP-450, if approved in any proposed therapeutic indication, in the United States, the European Union, Canada and other jurisdictions we may seek to enter, we will need to build out our sales and marketing capabilities, either on our own or with others. The establishment and development of our own commercial team or the establishment of a contract sales force to market ABP-450 will be expensive and time-consuming and may divert significant management focus and resources, potentially delaying any product launch. Moreover, we cannot be certain that we will be able to successfully develop this capability, given that we have no experience as a company in commercializing products. We may seek to enter into collaborations with other entities to utilize their established marketing and distribution capabilities, but we may be unable to enter into or maintain such agreements on favorable terms or at all. We can provide no assurance that any future collaborators will provide effective sales forces or marketing and distribution capabilities. We compete with many companies that currently have extensive, experienced and well-funded marketing and sales operations to recruit, hire, train and retain marketing and sales personnel, and will have to compete with those companies to recruit, hire, train and retain any of our own marketing and sales personnel. We will likely also face competition if we seek third parties to assist us with the sales and marketing efforts of ABP-450 in our proposed therapeutic indications. Without an internal team or the support of a third party to perform marketing and sales functions, we may be unable to compete successfully against these more established companies.

We will need to grow the size of our organization, and we may experience difficulties in managing this growth.

As of December 31, 2023, we had ten employees. As the clinical development of ABP-450 progresses, we also expect to experience significant growth in the number of our employees and the scope of our operations, particularly in the areas of research, development, regulatory affairs and, if ABP-450 receives marketing approval for any of our proposed indications, sales, marketing and distribution. In addition, we also expect to hire additional personnel in order to operate as a public company. To manage our anticipated future growth, we must continue to implement and improve our managerial, operational and financial systems, expand our facilities, and continue to recruit and train additional qualified personnel. In addition, we must effectively integrate, develop and motivate a growing number of new employees, and maintain the beneficial aspects of our corporate culture. The expansion of our operations may lead to significant costs and may divert our management and business development resources. We may not be able to effectively manage the expansion of our operations or recruit and train additional qualified personnel. Any inability to manage growth could delay the execution of our development and strategic objectives or disrupt our operations.

We currently rely, and for the foreseeable future will continue to rely, in substantial part on third parties, including independent organizations, advisors and consultants, and CROs to provide certain services to support and perform our operations. There can be no assurance that the services of these third parties will continue to be available to us on a timely basis when needed, or that we can find qualified replacements. In addition, if we are unable to effectively manage our outsourced activities or if the quality, accuracy or quantity of the services provided, in particular the services provided by our CROs, is compromised for any reason, our clinical studies may be delayed or terminated, and we may not be able to obtain, or may be substantially delayed in obtaining, regulatory approval of ABP-450 in any of our proposed therapeutic indications or otherwise advance our business. There can be no assurance that we will be able to manage our existing consultants or find other suitable outside contractors and consultants on economically reasonable terms, or at all.

Our employees, independent contractors, consultants, commercial collaborators, principal investigators, vendors and other agents may engage in misconduct or other improper activities, including non-compliance with regulatory standards and requirements.

We are exposed to the risk that our employees, independent contractors, consultants, commercial collaborators, principal investigators, vendors and other agents may engage in fraudulent conduct or other illegal activity. Misconduct by these parties could include intentional, reckless or negligent conduct or disclosure of unauthorized activities to us that violates applicable regulations, including those laws requiring the reporting of true, complete and accurate information to regulatory agencies, manufacturing standards, and federal and state healthcare laws and regulations. In particular, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, kickbacks, self-dealing and other abusive practices. We could face liability under the federal Anti-Kickback Statute and similar state laws. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, referrals, customer incentive programs and other business arrangements. Misconduct by these parties could also involve the improper use of individually

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identifiable information, including, without limitation, information obtained in the course of clinical studies, which could result in significant regulatory sanctions and serious harm to our reputation. Further, should violations include promotion of unapproved (off-label) uses of one or more of our products, we could face significant regulatory sanctions for unlawful promotion, as well as substantial penalties under the federal False Claims Act, or FCA, and similar state laws. Similar concerns could exist in jurisdictions outside of the United States as well. We adopted, in connection with the completion of the Business Combination, a code of conduct applicable to all of our employees, but it is not always possible to identify and deter misconduct by employees and other third parties, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to comply with these laws or regulations. The precautions we take to detect and prevent misconduct may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could have a significant impact on our business, including the imposition of civil, criminal and administrative penalties, damages, monetary fines, imprisonment, possible exclusion from participation in Medicare, Medicaid and other federal healthcare programs, additional reporting requirements and oversight if we become subject to a corporate integrity agreement or similar agreement to resolve allegations of noncompliance with these laws, contractual damages, reputational harm, diminished profits and future earnings, and curtailment of our operations, any of which could adversely affect our ability to operate our business, financial condition and results of operations.

Our proposed international operations will expose us to risks, and failure to manage these risks may adversely affect our operating results and financial condition.

We expect to have operations both inside and outside the United States if ABP-450 is approved for commercial sale in multiple jurisdictions. International operations are subject to a number of inherent risks, and our future results could be adversely affected by a number of factors if we seek and obtain the necessary approvals, including:

•requirements or preferences for domestic products, which could reduce demand for our products;

•differing existing or future regulatory and certification requirements;

•management communication and integration problems resulting from cultural and geographic dispersion;

•greater difficulty in collecting accounts receivable and longer collection periods;

•difficulties in enforcing contracts;

•difficulties and costs of staffing and managing non-United States operations;

•the uncertainty of protection for intellectual property rights in some countries;

•tariffs and trade barriers, export regulations and other regulatory and contractual limitations on our ability to sell our products;

•more stringent data protection standards in some countries;

•regulatory concerns limiting ability to import or export products;

•greater risk of a failure of foreign employees to comply with both United States and foreign laws, including export and antitrust regulations, the United States Foreign Corrupt Practices Act, or the FCPA, quality assurance and other healthcare regulatory requirements and any trade regulations ensuring fair trade practices;

•heightened risk of unfair or corrupt business practices in certain geographies and of improper or fraudulent sales arrangements that may impact financial results and result in restatements of, or irregularities in, financial statements;

•foreign currency exchange rates;

•potentially adverse tax consequences, including multiple and possibly overlapping tax structures and difficulties relating to repatriation of cash; and

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•political and economic instability, political unrest and terrorism. These and other factors associated with international operations could harm our ability to gain future revenue and, consequently, materially impact our business, results of operations and financial condition.

If product liability lawsuits are brought against us, we may incur substantial liabilities and may be required to limit commercialization of ABP-450.

We face an inherent risk of product liability as a result of the clinical testing of ABP-450 and will face an even greater risk if we commercialize any products. For example, we may be sued if any product we develop allegedly causes injury or is found to be otherwise unsuitable during product testing, manufacturing, marketing or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability and a breach of warranties. Claims could also be asserted under state consumer protection acts. If we cannot successfully defend ourselves against product liability claims, we may incur substantial liabilities or be required to limit commercialization of our products. Even a successful defense would require significant financial and management resources. Regardless of the merits or eventual outcome, liability claims may result in:

•decreased demand for ABP-450;

•termination of clinical study sites or entire study programs;

•injury to our reputation and significant negative media attention;

•withdrawal of clinical study participants or cancellation of clinical studies;

•significant costs to defend the related litigation;

•a diversion of management’s time and our resources;

•substantial monetary awards to study participants or patients;

•regulatory investigations, product recalls, withdrawals or labeling, marketing or promotional restrictions;

•loss of revenue;

•the inability to commercialize any products we develop; and

•a decline in our share price.

Our inability to obtain and maintain sufficient product liability insurance at an acceptable cost and scope of coverage to protect against potential product liability claims could prevent or inhibit the commercialization of ABP-450 in any current or future proposed therapeutic indication. We currently carry product liability insurance covering our clinical studies. Although we maintain such insurance, any claim that may be brought against us could result in a court judgment or settlement in an amount that is not covered, in whole or in part, by our insurance or that is in excess of the limits of our insurance coverage. Our insurance policies also have various exclusions and deductibles, and we may be subject to a product liability claim for which we have no coverage. We will have to pay any amounts awarded by a court or negotiated in a settlement that exceed our coverage limitations or that are not covered by our insurance, and we may not have, or be able to obtain, sufficient capital to pay such amounts. Moreover, in the future, we may not be able to maintain insurance coverage at a reasonable cost or in sufficient amounts to protect us against losses. If and when we obtain approval for marketing ABP-450, we intend to expand our insurance coverage to include the sale of ABP-450; however, we may be unable to obtain this liability insurance on commercially reasonable terms.

If we fail to attract and keep senior management and key scientific personnel, we may be unable to successfully develop ABP-450 in any of our proposed therapeutic indications, conduct our clinical studies and commercialize ABP-450.

Our success depends in part on our continued ability to attract, retain and motivate highly qualified management. We believe that our future success is highly dependent upon the contributions of our senior management, particularly Marc Forth, our Chief Executive Officer, as well as other members of our senior management team. The loss of services of any of these individuals could delay or prevent the successful development of our product pipeline, completion of our planned clinical studies or the commercialization of ABP-450 in each of our therapeutic indications or any future products we develop.

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In addition, we could experience difficulties attracting and retaining qualified employees in the future. For example, competition for qualified personnel in the pharmaceuticals field is intense due to the limited number of individuals who possess the skills and experience required by our industry. We may not be able to attract and retain quality personnel on acceptable terms, or at all. In addition, to the extent we hire personnel from competitors, we may be subject to allegations that they have been improperly solicited or that they have divulged proprietary or other confidential information or that their former employers own their research output.

Our business involves the use of hazardous materials, and we and our third-party manufacturer and supplier must comply with environmental laws and regulations, which can be expensive and restrict how we do business.

Our R&D and manufacturing activities in the future may, and Daewoong’s manufacturing and supplying activities presently do, involve the controlled storage, use and disposal of hazardous materials, including botulinum toxin type-A, a key component of ABP-450, and other hazardous compounds. We and Daewoong are subject to laws and regulations governing the use, manufacture, storage, handling and disposal of these hazardous materials. In some cases, these hazardous materials and various wastes resulting from their use are stored at Daewoong’s facilities pending their use and disposal. We and Daewoong cannot eliminate the risk of contamination, which could cause an interruption of Daewoong’s manufacturing processes, our commercialization efforts or our business operations and could cause environmental damage resulting in costly clean-up and liabilities under applicable laws and regulations governing the use, storage, handling and disposal of these materials and specified waste products. Although we believe that the safety procedures utilized by Daewoong for handling and disposing of these materials generally comply with the standards prescribed by these laws and regulations, this may not eliminate the risk of accidental contamination or injury from these materials. In such an event, we may be held liable for any resulting damages and such liability could exceed our resources, and state or federal or other applicable authorities may curtail our use of certain materials and interrupt our business operations. Furthermore, environmental laws and regulations are complex, change frequently and have tended to become more stringent.

Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.

Under Sections 382 and 383 of the Code, if a corporation undergoes an “ownership change,” generally defined as a greater than 50 percentage point change (by value) in its equity ownership by one or more 5% shareholders over a rolling three-year period, the corporation’s ability to use its pre-change net operating loss carryforwards, or NOLs, and other pre-change tax attributes, such as research tax credits, to offset its post- change taxable income or income tax liabilities, as applicable, may be limited. As of December 31, 2023 (Successor) and December 31, 2022 (Predecessor), the Company had $87.3 million and $67.5 million of federal NOLs available to offset our future federal taxable income, if any, and federal research and development tax credit carryforwards of $6.1 million and $3.9 million, respectively. These federal research and development tax credit carryforwards and our federal NOLs expire at various dates in 2039 and 2036, respectively. The Company had $116.2 million and $67.4 million of state NOLs as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor), respectively. We may experience ownership changes in the future as a result of subsequent shifts in our stock ownership. As a result, if we earn net taxable income, our ability to use our pre-change NOLs to offset federal taxable income may be subject to limitations, which could potentially result in increased future tax liability to us. Similar rules may apply under state tax laws. In addition, at the state level, there may be periods during which the use of NOLs is suspended or otherwise limited, which could accelerate or permanently increase state taxes owed.

Changes in tax laws may impact our future financial position and results of operations.

New income, sales, use or other tax laws, statutes, rules, regulations or ordinances could be enacted at any time, or interpreted, changed, modified or applied adversely to us, any of which could adversely affect our business operations and financial performance. We are currently unable to predict whether such changes will occur and, if so, the ultimate impact on our business. To the extent that such changes have a negative impact on us or our suppliers, including as a result of related uncertainty, these changes may materially and adversely impact our business, financial condition, results of operations and cash flows.

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Prior to the Business Combination, Priveterra identified material weaknesses in its internal control over financial reporting. In 2024, AEON identified additional material weaknesses in its internal control over financial reporting related to fiscal year 2023. One or more of these material weaknesses could adversely affect our ability to report our results of operations and financial condition accurately and in a timely manner, which may adversely affect investor confidence in us and materially and adversely affect our business and operating results.

Prior to consummation of the Business Combination, Priveterra management identified a material weakness in its internal control over financial reporting, related to Priveterra’s accounting for complex financial instruments. In 2024, AEON management identified additional material weaknesses in its internal control over financial reporting related to its fiscal year 2023, related to the Business Combination and for the valuation of complex financial instruments. To respond to the material weaknesses, we have devoted and plan to continue to devote, significant effort and resources to the remediation and improvement of our internal control over financial reporting. While we have processes to identify and appropriately apply applicable accounting requirements, we plan to enhance these processes to better evaluate our research and understanding of the nuances of the complex accounting standards that apply to our consolidated financial statements. Our plans at this time include providing enhanced access to accounting literature, research materials and documents, and increased communication among our personnel and third-party professionals with whom we consult regarding complex accounting applications. The elements of our remediation plan can only be accomplished over time, and we can offer no assurance that these initiatives will ultimately have the intended effects.

We may face an excise tax liability as a result of redemptions of Priveterra Class A common stock prior to and in connection with the Business Combination.

The Inflation Reduction Act of 2022 provides for, among other measures, a new 1% U.S. federal excise tax on certain repurchases (including redemptions) of stock by publicly traded domestic (i.e., U.S.) corporations. Because Priveterra was a Delaware corporation with securities trading on Nasdaq prior to the Business Combination, Priveterra was a “covered corporation” for this purpose. The excise tax is imposed on the repurchasing corporation itself, not its stockholders from whom the shares are repurchased. The amount of the excise tax is generally 1% of the excess of (i) the fair market value of the shares repurchased reduced by (ii) the fair market value of stock issued by the repurchasing corporation in the same year. In addition, certain exceptions apply to the excise tax. The U.S. Department of the Treasury (the “Treasury”) has been given authority to provide regulations and other guidance to carry out, and prevent the abuse or avoidance of, the excise tax.

A total of 27,042,840 shares of Priveterra Class A common stock were redeemed in 2023 in connection with Priveterra’s special meetings held in February 2023 and July 2023, respectively. Whether and to what extent we are ultimately subject to the excise tax in connection with these redemptions will depend on a number of factors, including (i) the fair market value of such redemptions, together with any other redemptions or repurchases consummated by us in 2023, (ii) the nature and amount of any equity issuances made by us and Priveterra in 2023 (including the shares of Priveterra Class A common stock issued in the Business Combination and any subsequent issuances we may make in 2023), and (iii) legal uncertainties regarding how the excise tax applies to transactions like the Business Combination and the content of final and proposed regulations and further guidance from the U.S. Department of the Treasury. Any excise tax would be payable by us, and the mechanics of any required payment of the excise tax are not clear.

Risks Related to our Reliance on Third Parties

We rely on the Daewoong Agreement to provide us exclusive rights to commercialize and distribute ABP-450 in certain territories. Any termination or loss of significant rights, including exclusivity, under the Daewoong Agreement would materially and adversely affect our development or commercialization of ABP-450.

Pursuant to the Daewoong Agreement, we have secured an exclusive license from Daewoong, a South Korean pharmaceutical manufacturer, to import, distribute, promote, market, develop, offer for sale and otherwise commercialize and exploit ABP-450 for therapeutic indications in certain territories including the United States, the European Union, the United Kingdom, Canada, Australia, Russia, Commonwealth of Independent States and South Africa. The Daewoong Agreement imposes on us obligations relating to exclusivity, territorial rights, development, regulatory approval, commercialization, payment, diligence, sublicensing, intellectual property protection and other matters. For example, we are obligated to use commercially reasonable efforts to obtain regulatory approval of ABP-450 and obtain from Daewoong all of our product supply requirements for ABP-450. In addition, under the Daewoong Agreement, we are required to submit our commercialization plan to a Joint Steering Committee, or JSC, comprised of an equal number of development and commercial representatives from Daewoong and us, for review and input.

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Although the Daewoong Agreement provides us with final decision-making power regarding the marketing, promotion, sale and/or distribution of ABP-450, any disagreement among the JSC would be referred to Daewoong’s and our respective senior management for resolution if the JSC is unable to reach a decision within thirty days, which may result in a delay in our ability to implement our commercialization plan or harm our working relationship with Daewoong. Further, under the Daewoong Agreement, we may not purchase, sell or distribute any injectable botulinum toxin that is launched in the covered territories after the effective date of the Daewoong Agreement other than ABP-450 in a covered territory or sell ABP-450 outside a covered territory.

The initial term of the Daewoong Agreement will expire on the later of December 20, 2029 or the fifth anniversary of our receipt of approval from the relevant governmental authority necessary to market and sell ABP-450 in any of the aforementioned territories. The Daewoong Agreement will renew for unlimited additional three-year terms after the expiration of the initial term. We or Daewoong may terminate the Daewoong Agreement if the other party breaches any of its duties or obligations and such breach continues without cure for ninety days, or thirty days in the case of a payment default, or, if such breach is not capable of being cured, immediately by delivery of written notice. The Daewoong Agreement will terminate without notice upon our bankruptcy or insolvency or if we assign our business or the Daewoong Agreement in whole or in part for the benefit of creditors. On March 19, 2024, we entered into a Fourth Amendment to the Daewoong Agreement (the “Daewoong Agreement Amendment”) with Daewoong, which amends the Daewoong Agreement to provide that Daewoong may terminate the Daewoong Agreement if, over any six month period, (a) we cease to commercialize ABP-450 in each of the territories specified in the License Agreement and (b) we cease to advance any clinical studies of ABP-450 any such territories. The Daewoong Agreement Amendment also provides that, in the event that the License Agreement is terminated for the foregoing reasons or due to the commencement of bankruptcy proceedings, Daewoong will have the right to purchase all Know-How (as defined in the License Agreement) related to ABP-450 for a price of $1.00 (the “Termination Purchase Right”). The Termination Purchase Right will terminate and expire upon Daewoong’s sale of 50% of its common stock, including common stock held by its affiliates and common stock that would be issued upon an Automatic Conversion or Optional Conversion of the Convertible Notes (as defined in the Convertible Notes).

We will be the sole owner of any marketing authorization we pursue related to therapeutic indications of ABP-450 in a covered territory. This will include ownership of any BLA that we may submit to the FDA, MAA that we may submit to the EMA, NDS that we may submit to Health Canada, and any other approvals that we may receive in a covered territory. However, if we do not renew the Daewoong Agreement following any initial or renewal term, or if Daewoong terminates the Daewoong Agreement due to a breach by us, we are obligated to transfer our rights in such marketing authorizations to Daewoong.

If we breach any material obligations, or use the intellectual property licensed to us in an unauthorized manner, we may be required to pay damages to Daewoong and Daewoong may have the right to terminate our license. Any termination or loss of rights under the Daewoong Agreement would materially and adversely affect our ability to develop and commercialize ABP-450, which in turn would have a material adverse effect on our business, operating results and prospects. If we were to lose our rights under the Daewoong Agreement, we believe it would be difficult or impossible for us to find an alternative supplier of a botulinum toxin type-A complex. In addition, to the extent the alternative supplier has not secured regulatory approvals in a jurisdiction, we would have to expend significant resources, including performing additional clinical studies, to obtain regulatory approvals that may never be obtained or require several years to obtain, which could significantly delay commercialization. We may be unable to raise additional capital to fund our operations during this extended time on terms acceptable to us or at all. If we were to commercialize ABP-450 and later experience delays as a result of a dispute with Daewoong, the demand for ABP-450 could be materially and adversely affected. For more information on the Daewoong Agreement, including a further explanation of our obligations, please see “Business — Daewoong License and Supply Agreement.”

We currently rely solely on Daewoong to manufacture ABP-450, and as such, any production or other problems with Daewoong could adversely affect us. The manufacture of biologics is complex and Daewoong may encounter difficulties in production that may impact our ability to provide supply of ABP-450 for clinical studies, our ability to obtain marketing approval, or our ability to obtain commercial supply of our products, which, if approved, could be delayed or stopped.

We have no experience in biologic manufacturing and do not own or operate, and we do not expect to own or operate, facilities for product manufacturing, storage and distribution, or testing. We depend solely upon Daewoong to manufacture ABP-450. Any failure or refusal by Daewoong to supply ABP-450 could delay, prevent or impair our clinical development or commercialization efforts. The Daewoong Agreement also provides for a fixed price related to the supply of ABP-450 for ten years or for five years after the receipt of regulatory approvals, and if a change in price were to occur, it could impair our ability to obtain necessary quantities of ABP-450. Although alternative sources of supply may exist, the number of third-party suppliers with the necessary manufacturing and regulatory expertise and facilities is limited, and it could be expensive and take a significant amount of time to arrange for alternative

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suppliers, which could have a material adverse effect on our business. New suppliers of any product candidate would be required to qualify under applicable regulatory requirements and would need to have sufficient rights under applicable intellectual property laws to the method of manufacturing the product candidate. Obtaining the necessary FDA approvals or other qualifications under applicable regulatory requirements and ensuring non- infringement of third-party intellectual property rights could result in a significant interruption of supply and could require the new manufacturer to bear significant additional costs which may be passed on to us. We will also need to verify, such as through a manufacturing comparability study, that any new contract manufacturing organization or manufacturing process will produce our product candidate according to the specifications previously submitted to the FDA or another regulatory authority. We may be unsuccessful in demonstrating the comparability of clinical suppliers which could require conducting additional clinical studies.

In addition, there are risks associated with large scale manufacturing for clinical studies or commercial scale including, among others, cost overruns, potential problems with process scale-up, process reproducibility, stability issues, compliance with good manufacturing practices, lot consistency and timely availability of raw materials. Even if we obtain marketing approval for ABP-450, there is no assurance that Daewoong will be able to manufacture the approved product to specifications acceptable to the FDA or other comparable foreign regulatory authorities, to produce it in sufficient quantities to meet the requirements for the potential commercial launch of the product or to meet potential future demand. If Daewoong is unable to produce sufficient quantities for clinical studies, including preclinical studies, or for commercialization, our development and commercialization efforts would be impaired, which would have an adverse effect on our business, financial condition, results of operations and growth prospects.

Our reliance on Daewoong entails additional risks, including reliance on Daewoong for regulatory compliance and quality assurance, the possible breach of the Daewoong Agreement by Daewoong, and the possible termination or nonrenewal of the Daewoong Agreement at a time that is costly or inconvenient for us. Our failure, or the failure of Daewoong, to comply with applicable regulations, such as cGMP, which includes, among other things, quality control, quality assurance and the maintenance of records and documentation, could result in sanctions being imposed on us, including clinical holds, fines, injunctions, civil penalties, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of the product candidate or drugs, import alerts or detentions preventing import of product into the United States or other territories, operating restrictions and criminal prosecutions, any of which could significantly and adversely affect supplies of ABP-450. Our dependence on Daewoong also subjects us to all of the risks related to Daewoong’s business, which are all generally beyond our control. Daewoong’s ability to perform its obligations under the Daewoong Agreement is dependent on its operational and financial health, which could be negatively impacted by several factors, including changes in the economic, political and legislative conditions in South Korea and the broader region in general and the ability of Daewoong to continue to successfully attract customers and compete in its market. Daewoong’s lack of familiarity with, or inability to effectively operate, the facility and produce products of consistent quality, may harm our ability to compete in our market.

In addition, we are ultimately responsible for distribution of products under any authorization or approval we hold to investigate or market ABP-450. We do not own a manufacturing facility and we have never supervised manufacturing operations, but we have regulatory obligations to review batch records and release of the investigational product for our clinical studies. Further, we will have similar regulatory obligations if the product is marketed and could be held responsible for any distribution of adulterated or misbranded ABP-450, even if caused by Daewoong’s noncompliance.

The FDA conducted a cGMP and pre-approval inspection of Daewoong’s manufacturing facility in South Korea related to Evolus’ BLA for Jeuveau from November 8, 2017 to November 17, 2017. At the end of the inspection, the FDA issued an FDA Form 483 with ten inspectional observations of regulatory noncompliance to Daewoong. The Form 483 included observations relating to the need for adherence to improved procedures, processes and documentation relating to investigations of and corrective actions for non-compliance with specifications for batches and components, environmental monitoring, drug substance testing, computer system access, material handling and staff training. Daewoong timely responded to the FDA with a plan for implementing corrective actions related to these observations. Daewoong provided complete responses to the Form 483; however, the time to correct the observations, submit the complete response and FDA review and acceptance of the responses delayed approval of Evolus’ BLA. None of the FDA, Health Canada or the EMA have conducted a repeat inspection of Daewoong manufacturing facility per usual FDA Quality Review Practices to confirm continued compliance with cGMP regulations. A separate pre-licensure inspection may be required for any BLA we submit for any of our product candidates. Should the repeat inspection find serious deviation from cGMP manufacturing regulations, or repeated observations, Daewoong may be required to expend significant time and resources to correct any observations, which could cause delays and adversely affect availability of drug product to support our R&D operations. For example, the FDA is permitted to deny entry of any imported product that “appears” to be adulterated or misbranded, meaning it does not actually need to be violative to be prohibited from entry, just that the FDA believes it might be violative. FDA-483 observations, particularly if

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eventually escalated into an FDA untitled or warning letter, could result in an import alert, which bans entry of a product into the United States until issues are resolved to the FDA’s satisfaction, and until the FDA has reinspected the facility to confirm all corrections have been implemented, which could potentially take a considerable amount of time. In addition, failure to have an observation-free inspection during a pre-approval inspection can result in delay or denial or FDA approval. Similar issues could occur in other jurisdictions as well.

Additionally, if Daewoong’s facility were to be damaged, destroyed or otherwise unable to operate or comply with regulatory requirements, whether due to earthquakes, fire, floods, hurricanes, storms, tornadoes, other natural disasters, employee malfeasance, terrorist acts, political unrest, power outages or otherwise, or if operations at the facility were disrupted for any other reason, such an event could negatively affect our ongoing preclinical studies and clinical studies and, if ABP-450 is approved, jeopardize Daewoong’s ability to manufacture ABP-450 as promptly as we or our customers expect or possibly at all. If an event occurred that prevented Daewoong from using all or a significant portion of its manufacturing facility due to damaged critical infrastructure, or that otherwise disrupted operations, it may be difficult or, in certain cases, impossible for Daewoong to supply enough ABP-450 to continue our business for a substantial period of time.

A material breach by us of the terms of our license and settlement agreement with Medytox, Inc. could have a material adverse effect on our business.

In May 2021, Medytox, Inc., or Medytox, brought a case against Old AEON in the United States District Court for the Central District of California, or the Medytox Litigation, alleging, among other things, that Daewoong stole Medytox’s botulinum toxin bacterial strain, or the BTX strain, and misappropriated certain trade secrets of Medytox, including the process used to manufacture ABP-450 using the BTX strain, and that our and Daewoong’s activities conducted in the United States gave rise to liability for misappropriation of trade secrets. Medytox sought, among other things, (i) actual, consequential and punitive damages, (ii) a reasonable royalty, as appropriate, (iii) disgorgement of any proceeds or profits, (iv) injunctive relief prohibiting us from using Medytox’s trade secrets to manufacture, offer to sell, or sell therapeutic BTX products, including ABP-450, and (v) attorneys’ fees and costs.

The Medytox Litigation was another step in an ongoing dispute involving Medytox and Allergan, on the one side, and Evolus, Daewoong and us on the other side. In June 2017, Medytox brought a civil lawsuit of a similar nature against Evolus, Daewoong and us in the Superior Court of the State of California, which we refer to as the Superior Court Litigation, and a separate lawsuit in October 2017 against Daewoong in South Korea, which we refer to as the Korea Litigation. The lawsuit filed in the Superior Court of the State of California alleged claims substantially similar to the Medytox Litigation and was subsequently stayed on grounds of forum non conveniens, because the underlying facts that gave rise to the complaint occurred in South Korea, among other reasons. We are not a party to the Korea Litigation. In April 2018, the Superior Court of the State of California dismissed Medytox’s suit against Daewoong without prejudice on the basis that Medytox had brought a substantially similar proceeding against Daewoong in South Korea, and continued a stay of the case as to us and Evolus. In February 2021, the Superior Court of the State of California dismissed Medytox’s suit against us without prejudice, following Medytox’s filing of a notice of settlement of the case based on a settlement it entered with Evolus.

Additionally, in January 2019, Allergan and Medytox filed a complaint against Daewoong and Evolus with the United States International Trade Commission, or the United States ITC, alleging that the BTX strain used in Evolus’ Jeuveau product is manufactured based on misappropriated trade secrets of Medytox and therefore its importation is an unfair act. The Administrative Law Judge issued a final determination in December 2020. The final determination concluded that a violation of Section 337 of the Tariff Act of 1930 had occurred, and the United States ITC issued a limited exclusion order forbidding entry of Jeuveau into the United States for 21 months and a cease and desist order prohibiting Daewoong and Evolus from engaging in the importations, sale for importation, marketing, distribution, offering for sale, the sale after the importation of, or other transfers of Jeuveau within the United States for 21 months. The 21-month ban was stayed as a result of a settlement agreement between Evolus and Medytox in February 2021.

Effective June 21, 2021, we entered into a settlement and license agreement with Medytox, or the Medytox Settlement Agreement, pursuant to which, among other things, Medytox agreed (a) to dismiss all claims against us in the Medytox Litigation, (b) to pursue dismissal of the appeals related to the December 2020 final determination of the United States ITC and agreed that as a result of such dismissal the final determination would be vacated, (c) to file appropriate documents in the Korea Litigation and related actions in support of the terms of the settlement, and (d) not to revive or otherwise pursue the Superior Court Litigation with respect to us. In addition, Medytox granted us a non-exclusive, royalty bearing license to Medytox’s botulinum toxin strain and specific trade

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secrets alleged to have been misappropriated in the litigation to commercialize and manufacture specific botulinum neurotoxin products including ABP-450 worldwide, with the exception of South Korea. In exchange for the license, we issued Medytox 26,680,511 shares of Old AEON common stock, par value $0.0001 per share, and agreed to pay Medytox single-digit royalties on the net sales of licensed products for 15 years following our first $1.0 million in commercial sales of neurotoxin products.

Medytox can terminate the Medytox Settlement Agreement if we materially breach any material provision of the agreement, either immediately upon written notice if the breach is incurable or after 60 days if capable of remedy. Additionally, Medytox may terminate the Medytox Settlement Agreement with 15 days of written notice if we or our affiliates or sublicensees challenge the validity, enforceability, scope, or protected status of Medytox’s botulinum strain and specific trade secrets alleged to have been misappropriated in the litigation. If the Medytox Settlement Agreement were terminated, Medytox would be able to revive the Medytox Litigation and other claims against us, and may seek an injunction or other ruling against us in the Korea Litigation, any one of which could result in us losing access to ABP-450 and the manufacturing process and require us to negotiate a new license with Medytox for continued access to ABP-450. We may not be able to successfully negotiate such license on terms acceptable to us or at all. If we are unable to license ABP-450, we may not be able to find a replacement product candidate on a timeline favorable to us, if at all, without expending significant resources and being required to seek additional regulatory approvals, which would be uncertain, time consuming and costly.

We rely, and will continue to rely, on third parties and consultants to conduct all of our preclinical studies and clinical studies. If these third parties or consultants do not successfully carry out their contractual duties or meet expected deadlines, we may be unable to obtain regulatory approval for ABP-450.

We do not currently have the ability to independently conduct any preclinical studies or clinical studies. We rely, and will continue to rely, on medical institutions, clinical investigators, contract laboratories, collaborative partners and other third parties, such as CROs, to conduct preclinical studies and clinical studies on ABP-450. The third parties with whom we currently or may in the future contract for execution of any of our preclinical studies and clinical studies play a significant role in the conduct of these studies and the subsequent collection and analysis of data. However, these third parties are not our employees, and except for contractual duties and obligations, we have limited ability to control the amount or timing of resources that they devote to any of our current or future programs. Although we rely on these third parties to conduct our preclinical studies and clinical studies, we remain responsible for ensuring that each of our preclinical studies and clinical studies is conducted in accordance with the investigational plan and protocol. Moreover, the FDA and other similar regulatory authorities require us to observe both good laboratory practices, or GLP, and animal welfare requirements for preclinical studies, and to comply with GCPs for conducting, monitoring, recording and reporting the results of clinical studies to ensure that the data and results are scientifically credible and accurate, and that the study subjects are adequately informed of the potential risks of participating in clinical studies. We also rely, and will continue to rely, on consultants to assist in the execution, including data collection and analysis, of any of our future clinical studies.

In addition, the execution of preclinical studies and clinical studies, and the subsequent compilation and analysis of the data produced, requires coordination among various parties. In order for these functions to be carried out effectively and efficiently, it is imperative that these parties communicate and coordinate with one another. Moreover, these third parties may also have relationships with other commercial entities, some of which may compete with us. If the third parties or consultants conducting our clinical studies do not perform their contractual duties or obligations, experience work stoppages, do not meet expected deadlines, terminate their agreements with us or need to be replaced, or if the quality or accuracy of the preclinical or clinical data they obtain is compromised due to the failure to adhere to GLPs, or our clinical study protocols or GCPs, or for any other reason, we may need to conduct additional clinical studies or enter into new arrangements with alternative third parties, which could be difficult, costly or impossible, and our preclinical studies and clinical studies may be extended, delayed or terminated or may need to be repeated. Further, any noncompliance that results in data integrity issues could put any regulatory approval we receive at risk of withdrawal, and could subject us to regulatory sanctions due to failure to adequately oversee the third parties we rely upon. If any of the foregoing were to occur, we may not be able to obtain, or may be delayed in obtaining, regulatory approval for and will not be able to, or may be delayed in our efforts to, successfully commercialize ABP-450 in any of our proposed therapeutic indications.

Public health outbreaks, epidemics or pandemics (such as the COVID-19 pandemic) may materially and adversely affect our business and operations.

The COVID-19 pandemic previously adversely affected, and the COVID-19 pandemic or other actual or threatened public health outbreaks, epidemics or pandemics may in the future adversely affect, among other things, our research and development efforts,

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clinical trial operations, manufacturing and supply chain operations, administrative personnel, third-party service providers, and business partners.

While the COVID-19 pandemic did not materially adversely affect our business operations during the twelve months ended December 31, 2023, economic and health conditions in the United States and across most of the globe continue to change rapidly and may materially affect us economically. While the potential economic impact brought by, and the duration of, the COVID-19 pandemic may be difficult to assess or predict, a continuing widespread pandemic could result in significant disruption of global financial markets, reducing our ability to access capital, which could in the future negatively affect our liquidity. In addition, a recession or market correction resulting from the spread of COVID-19 or a future public health outbreak could materially affect our business and the value of our common stock. The ultimate impact of the COVID-19 pandemic or a similar public health outbreak is highly uncertain and subject to change. We do not yet know the full extent of potential delays or impacts on our business, our clinical trials, healthcare systems or the global economy as a whole. However, these effects could have a material adverse effect on our business, results of operations and financial condition.

We may use third-party collaborators to help us develop, validate or commercialize any new products, and our ability to commercialize such products could be impaired or delayed if these collaborations are unsuccessful.

We may license or selectively pursue strategic collaborations for the development, validation and commercialization of ABP-450 in any current or future proposed therapeutic indications. In any third-party collaboration, we would be dependent upon the success of the collaborators in performing their responsibilities and their continued cooperation, and we would have limited control over the amount and timing of resources and effort that our collaborators would dedicate to the development or commercialization of our product candidates. Our collaborators may not cooperate with us or perform their obligations under our agreements with them at all or as expected. Our collaborators may choose to pursue alternative technologies in preference to those being developed in collaboration with us. The development, validation and commercialization of our current and future product candidates may be delayed if collaborators fail to conduct their responsibilities in a timely manner or in accordance with applicable regulatory requirements or if they breach or terminate their collaboration agreements with us. Our collaborators could also independently develop, or develop with third parties, products that compete directly or indirectly with our product candidates, fail to properly maintain or defend our intellectual property rights or infringe the intellectual property rights of third parties, exposing us to litigation. Disputes with our collaborators could also impair our reputation or result in development and commercialization delays, decreased revenues and could cause litigation expenses.

In addition, we may face significant competition in seeking appropriate collaborators. Whether we reach a definitive agreement for a collaboration will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation of a number of factors. Those factors may include the design or results of clinical studies, the likelihood of approval by the FDA or similar regulatory authorities outside the United States, the potential market for ABP-450 or our future product candidates in our proposed therapeutic indications, the costs and complexities of manufacturing and delivering ABP-450 or our future product candidates to patients, the potential of competing products, the existence of uncertainty with respect to our ownership of technology, which can exist if there is a challenge to such ownership without regard to the merits of the challenge, and industry and market conditions generally. The collaborator may also consider alternative product candidates or technologies for similar indications that may be available to collaborate on and whether such a collaboration could be more attractive than the one with us for our product candidate. Collaborations are complex and time-consuming to negotiate and document.

We may not be able to negotiate collaborations on a timely basis, on acceptable terms, or at all. If we are unable to do so, we may have to curtail the development of ABP-450 or our future product candidates in any of our proposed therapeutic indications, reduce or delay development programs, delay potential commercialization or reduce the scope of any sales or marketing activities, or increase our expenditures and undertake development or commercialization activities at our own expense. If we elect to increase our expenditures to fund development or commercialization activities on our own, we may need to obtain additional capital, which may not be available to us on acceptable terms or at all. If we do not have sufficient funds, we may not be able to further develop and commercialize ABP-450 or our future product candidates in any of our proposed therapeutic indications or bring them to market and generate revenue.

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Risks Related to Intellectual Property

If we or any of our current or future licensors, including Daewoong, are unable to maintain, obtain or protect intellectual property rights related to ABP-450 and any future product candidates we may develop, or if the scope of any protection obtained is not sufficiently broad, we may not be able to compete effectively in our market.

Our success depends, in large part, on our ability to seek, obtain and maintain intellectual property protection in the United States and other countries with respect to our technologies. We and Daewoong currently rely upon a combination of trademarks, trade secret protection, confidentiality agreements and proprietary know-how. Additionally, Daewoong has obtained a United States patent related to its proprietary botulinum toxin manufacturing process. We also intend to protect our proprietary technology and methods by, among other things, filing for and obtaining United States and foreign patent applications related to our proprietary technology, inventions, methods of use, and improvements that are important to the development and implementation of our business. However, due to existing patent eligibility laws, we do not expect to obtain patent protection for the composition of matter for botulinum toxin, as it is produced by Clostridium botulinum, a gram-positive, rod-shaped, anaerobic, spore-forming, motile bacterium with the ability to produce the botulinum toxin. Although we only own one issued patent covering our migraine injection paradigm (U.S. Patent No. 11,826,405), we do not own any other issued patents, but we have filed certain provisional and non-provisional patent applications with the United States Patent and Trademark Office, or USPTO, related to other novel and proprietary methods of utilizing ABP-450 for therapeutic purposes. These patent applications may fail to result in any issued patents with claims that cover ABP-450 in any currently proposed or future therapeutic indications, in the United States or in other foreign countries, and the patents, if issued, may be declared invalid or unenforceable.

The patent prosecution process is expensive, time-consuming and complex, and we may not be able to file, prosecute, maintain, enforce or license all necessary or desirable patent applications at a reasonable cost or in a timely manner. We may not be able to obtain or maintain patent applications and patents due to the subject matter claimed in such patent applications and patents being in disclosures in the public domain. In addition, it is possible that we will fail to identify patentable aspects of our R&D output before it is too late to obtain patent protection. Although we enter into confidentiality agreements with parties who have access to confidential or patentable aspects of our R&D output, such as our employees and third-party consultants, any of these parties may breach these agreements and disclose such output before a patent application is filed, thereby jeopardizing our ability to seek patent protection. Consequently, we may not be able to prevent any third party from using any of our technology that is in the public domain to compete with ABP-450 and any future product candidates.

Other parties have developed technologies that may be related to or competitive to our own technologies and such parties may have filed or may file patent applications, or may have obtained or may obtain patents, claiming inventions that may overlap or conflict with those claimed in our patent applications or any future issued patents. We may not be aware of all third-party intellectual property rights potentially relating to ABP-450 and any future product candidates. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and in other jurisdictions are typically not published until 18 months after filing, or, in some cases, not at all. Therefore, we cannot know with certainty whether the inventors of our pending patent applications were the first to make the inventions claimed in those patent applications, or that they were the first to file for patent protection of such inventions. If a third party can establish that we were not the first to make or the first to file for patent protection of such inventions, our patent applications may not issue and any patents, if issued, may be challenged and invalidated or rendered unenforceable.

Even in the event our non-provisional patent applications are granted, or if we in-license issued patent rights from third parties, the issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability and any such patents may be challenged in courts or patent offices in the United States and abroad and later declared invalid or unenforceable. For example, we may be subject to a third-party submission of prior art to the USPTO challenging the validity of one or more claims of any such patents. A third party may also claim that any such patents are invalid or unenforceable in a litigation. The outcome following legal assertions of invalidity and unenforceability is unpredictable. An adverse result in any legal proceeding could put any such patents at risk of being invalidated or interpreted narrowly and could allow third parties to commercialize our products and compete directly with us, without payment to us, or result in our inability to manufacture or commercialize products without infringing third-party patent rights. In addition, we may become involved in derivation, reexamination, inter partes review, post-grant review or interference proceedings and other similar proceedings in foreign jurisdictions (e.g., opposition proceedings) challenging the validity, priority or other features of patentability of any such patent rights. Challenges to our patent rights may result in loss of patent rights, exclusivity, or in patent claims being narrowed, invalidated, or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the scope and duration of the patent protection of

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ABP-450 or future product candidates. Such challenges also may result in substantial cost and require significant time from our scientists and management, even if the eventual outcome is favorable to us. Any of the foregoing could have a material adverse effect on our business, financial condition, results of operations and prospects.

Furthermore, patents have a limited lifespan. In the United States, the natural expiration of a patent is generally 20 years after it is filed. Various extensions may be available; however, the life of a patent, and the protection it affords, is limited. Given the amount of time required for the development, testing and regulatory review of botulinum toxins, patents protecting such product candidates might expire before or shortly after they are commercialized. As a result, our patent applications, even if issued, may not provide us with adequate and continuing patent protection sufficient to exclude others from commercializing products similar to ABP-450 or future product candidates, including biosimilar versions of such products.

Even if they are unchallenged, our pending patent applications, if issued, may not provide us with any meaningful protection or prevent competitors from designing around our patent claims to circumvent our patents by developing similar or alternative technologies or therapeutics in a non-infringing manner. If the patent protection provided by our patent applications, if issued, is not sufficiently broad to impede such competition, our ability to successfully commercialize ABP-450 and future product candidates could be negatively affected, which could have a material adverse effect on our business, financial condition, results of operations and prospects.

Under the Daewoong Agreement, we license the trademark for Nabota associated with ABP-450 from Daewoong; however, we may ultimately pursue alternative trademarks and branding for ABP-450. Our or Daewoong’s trade secrets and other confidential proprietary information and those of our future licensors could be disclosed or competitors could otherwise gain access to our trade secrets or independently develop substantially equivalent information and techniques. Further, the laws of some foreign countries do not protect proprietary rights to the same extent or in the same manner as the laws of the United States. As a result, we or any of our current or future licensors may encounter significant problems in protecting and defending our or their intellectual property both in the United States and internationally. If we or any of our current or future licensors are unable to prevent material disclosure of the non-patented intellectual property related to ABP-450 to third parties, we may not be able to establish or maintain a competitive advantage in our market, which could adversely affect our business.

In addition to the protection afforded by patents, trademarks, confidentiality agreements and proprietary know-how, we may in the future rely upon in-licensed or acquired patents or proprietary technology for the development of ABP-450 in any currently proposed or future therapeutic indications. We may not be able to in-license third party patents necessary to commercialize ABP-450 on commercially reasonable terms, or at all, which could materially harm our business. Even if we are able to in-license any such necessary intellectual property, it could be on nonexclusive terms, thereby giving our competitors and other third parties access to the same intellectual property licensed to us, and it could require us to make substantial licensing and royalty payments. The licensing or acquisition of third-party intellectual property rights is a competitive area, and several more established companies may pursue strategies to license or acquire third-party intellectual property rights that we may consider attractive or necessary. These established companies may have a competitive advantage over us due to their size, capital resources and greater clinical development and commercialization capabilities. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to us. We also may be unable to license or acquire third-party intellectual property rights on terms that would allow us to make an appropriate return on our investment. If we are unable to successfully obtain rights to required third-party intellectual property or maintain the existing intellectual property rights we have licensed, we may be required to expend significant time and resources to redesign ABP-450 or future product candidates, or to develop or license replacement technology, all of which may not be feasible on a technical or commercial basis, and we may have to abandon development of ABP-450 or future product candidates which could have a material adverse effect on our business, financial condition, results of operations and prospects.

Additionally, the strength of any patents that issue from our non-provisional patent applications or that we may in-license from third parties in the technology and healthcare fields involves complex legal and factual questions and has, in recent years, been the subject of much litigation. As a result, the issuance, scope, validity, enforceability and commercial value of any patent rights in such fields can be uncertain. Our pending patent applications and any patent applications that we may in-license may fail to result in issued patents with claims that cover ABP-450 in any currently proposed or future therapeutic indications, in the United States or in other foreign countries, and the issued patents that we may in-license may be declared invalid or unenforceable.

We are reliant on the ability of Daewoong, as the licensor of our only product candidate, to maintain its intellectual property and protect its intellectual property against misappropriation, infringement or other violation. We may not have primary control over Daewoong’s or our future licensors’ patent prosecution activities. Furthermore, we may not be allowed to comment on prosecution

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strategies, and patent applications currently being prosecuted may be abandoned by the patent owner without our knowledge or consent.

With respect to patents that are issued to our licensors, or patents that may issue on patent applications, third parties may challenge their validity, enforceability or scope, which may result in such patents being narrowed or invalidated. As a licensee, we are reliant on Daewoong and our future licensors to defend any third-party claims. Our licensors may not defend or prosecute such actions as vigorously or in the manner that we would have if entitled to do so, and we may be impacted by any judgment or settlement resulting from such actions. Also, a third party may challenge the validity of our in-licensing transactions. Furthermore, even if they are unchallenged, any of our future in-licensed patents and patent applications may not adequately protect the licensors or our intellectual property or prevent others from designing around their or our claims.

Third-party claims of intellectual property infringement, misappropriation or violation, or challenges related to the invalidity or unenforceability of any issued patents we may obtain or in-license may prevent or delay our development and commercialization efforts or otherwise adversely affect our results of operations.

Our commercial success depends in part on our and any of our future collaborators avoiding infringement, misappropriation or other violation of the intellectual property and related proprietary rights of third parties. Competitors and other entities that possess intellectual property rights related to the use of botulinum toxins in the fields of neurology and gastroenterology have developed large portfolios of patents and patent applications in fields relating to our business. In particular, there are patents held by third parties that relate to the treatment with botulinum toxin-based products. There may also be patent applications that have been filed but not published that, when issued as patents, could be asserted against us. There is a substantial amount of litigation, both within and outside the United States, involving patent and other intellectual property rights in the technology, medical device and pharmaceutical industries, including patent infringement lawsuits, interferences, oppositions and inter partes reexamination proceedings before the USPTO. Numerous United States and foreign issued patents and pending patent applications, which are owned by third parties, exist in the fields in which we plan to develop ABP-450. As the technology, medical device and pharmaceutical industries expand and more patents are issued, the risk increases that our product candidate may be subject to claims of infringement of the patent rights of third parties, regardless of their merit.

There may be third-party patents or patent applications with claims to materials, methods of manufacture or methods for treatment related to the use or manufacture of ABP-450. Because patent applications can take many years to issue, may be confidential for 18 months or more after filing and can be revised before issuance, there may be currently pending patent applications that may later result in issued patents that ABP-450 or any future product candidates may infringe. It is difficult for industry participants, including us, to identify all third-party patent rights that may be relevant to ABP-450 and future product candidates because patent searching is imperfect due to differences in terminology among patents, incomplete databases and the difficulty in assessing the meaning of patent claims. We may fail to identify relevant patents or patent applications or may identify pending patent applications of potential interest but incorrectly predict the likelihood that such patent applications may issue with claims of relevance to our technology or incorrectly conclude their invalidity or unenforceability. In addition, pending patent applications that have been published can, subject to certain limitations, be later amended in a manner that could cover ABP-450 or future product candidates and third parties may obtain patents in the future and claim that use of our technologies infringes upon these patents. Even if we believe claims brought against us are without merit, a court of competent jurisdiction could hold that these third-party patents are valid, enforceable and infringed. In order to successfully challenge the validity of any such United States patent in federal court, we would need to overcome a presumption of validity. As this burden is a high one requiring us to present clear and convincing evidence as to the invalidity of any such United States patent claim, there is no assurance that a court of competent jurisdiction would invalidate the claims of any such United States patent or find that ABP-450 or future product candidates did not infringe any such claims. If any third-party patents were held by a court of competent jurisdiction to cover the manufacturing process of ABP-450, the holders of any such patents may be able to block our ability to commercialize ABP-450 in any proposed therapeutic indication unless we obtain a license under the applicable patents or until such patents expire. Similarly, if any third-party patent were held by a court of competent jurisdiction to cover aspects of our methods of use, the holders of any such patent may be able to block our ability to develop and commercialize ABP-450 unless we obtain a license or until such patent expires. In either case, such a license may not be available on commercially reasonable terms or at all.

In addition to claims of patent infringement, third parties may bring claims against us asserting misappropriation or other violations of proprietary technology or other information in the development, manufacture and commercialization of ABP-450. Defense of such a claim would require dedicated time and resources, which time and resources could otherwise be used by us toward the maintenance of our own intellectual property and the development and commercialization of ABP-450 in any current or future

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proposed therapeutic indication or for operational upkeep and manufacturing of our product. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments and if securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock. We have been, and may in the future become, party to, or be threatened with, adversarial proceedings or litigation where our competitors or other third parties may assert claims against us, alleging that our therapeutics, manufacturing methods, formulations, administration methods or delivery devices infringe, misappropriate or otherwise violate their intellectual property rights, including patents and trade secrets. For example, in the past, Medytox asserted that we and Daewoong were employing their proprietary technology without authorization, and other third parties may make similar assertions about us or any of our current or future licensors, including Daewoong, in the future. For more information regarding our litigation with Medytox, please see “Risk Factors — Risks RelatedtoOurRelianceonThirdParties—Amaterialbreachbyusof thetermsof ourlicenseandsettlement agreementwithMedytox,Inc.couldhaveamaterialadverseeffectonourbusiness.”

Likewise, any patents that may issue from our pending patent applications or any future in-licensed patents and pending patent applications may also be subject to priority, validity, inventorship and enforceability disputes in court or before administrative bodies in the United States or abroad. If we or any of our licensors are unsuccessful in any of these proceedings, such patents and patent applications may be narrowed, invalidated or held unenforceable, we may be required to obtain licenses from third parties, which may not be available on commercially reasonable terms or at all, or we may be required to cease the development, manufacture and commercialization of ABP-450 or future product candidates. Any of the foregoing could have a material adverse effect on our business, financial condition, results of operations and prospects.

Parties making claims against us or any of our current or future licensors may request and obtain injunctive or other equitable relief, which could effectively block our ability to further develop and commercialize ABP-450. Defense of these claims, regardless of their merit, would involve substantial litigation expense and would be a substantial diversion of employee resources from our business which time and resources could otherwise be used by us toward the maintenance of our own intellectual property and the development and commercialization of ABP-450 in any current or future proposed therapeutic indication or for operational upkeep and manufacturing of our product. In the event of a successful claim of infringement, misappropriation or other violation of a third party’s intellectual property, we or any of our current or future licensors may have to pay substantial damages, including treble damages and attorneys’ fees for willful infringement, obtain one or more licenses from third parties which may not be commercially available, or pay royalties or redesign our infringing products or manufacturing processes, which may be impossible or require substantial time and monetary expenditure. Furthermore, even in the absence of litigation, we may need to obtain licenses from third parties to advance our research, manufacture clinical study supplies or allow commercialization of ABP-450 in any current or future proposed therapeutic indication. We may fail to obtain any of these licenses at a reasonable cost or on reasonable terms, if at all. In that event, we would be unable to further develop and commercialize ABP-450 in one or more of our proposed therapeutic indications, which could harm our business significantly. Similarly, third-party patents could exist that might be enforced against our products, resulting in either an injunction prohibiting our sales, or with respect to our sales, an obligation on our part to pay royalties and/or other forms of compensation to third parties.

We may become involved in lawsuits to protect or enforce our intellectual property or the patents and other intellectual property of our licensors, which could be expensive and time-consuming.

Competitors may infringe our intellectual property, including any future patents we may acquire, or any future patents or other intellectual property licensed to us by our licensors, including Daewoong. As a result, we or any of our current or future licensors may be required to file infringement claims to stop third-party infringement or unauthorized use. Even if resolved in our favor, this can be unpredictable, expensive, particularly for a company of our size, and time-consuming and may cause us to incur significant expenses and distract our scientific and management personnel from their normal responsibilities. In addition, in an infringement proceeding, a court may decide that a patent of ours or any of our current or future licensors is not valid or is unenforceable, or may refuse to stop the other party from using the technology at issue on the grounds that our patent claims do not cover its technology or that the factors necessary to grant an injunction against an infringer are not satisfied.

An adverse determination of any litigation or other proceedings could put one or more of such patents at risk of being invalidated or interpreted narrowly. Interference, derivation or other proceedings brought at the USPTO may be necessary to determine the priority or patentability of inventions with respect to any of our future patent applications or those of our licensors or collaborators. Litigation or USPTO proceedings brought by us or any of our current or future licensors may fail or may be invoked against us or our licensors by third parties. Even if we are successful, domestic or foreign litigation or USPTO or foreign patent office proceedings may result in substantial costs and distraction to our management or the management of any of our current or future licensors, including

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Daewoong. We may not be able, alone or with any of our current or future licensors or collaborators, to prevent misappropriation of our proprietary rights, particularly in countries where the laws may not protect such rights as fully as in the United States.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation or other proceedings, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation or proceedings. In addition, during the course of this kind of litigation or proceedings, there could be public announcements of the results of hearings, motions or other interim proceedings or developments or public access to related documents. If securities analysts or investors perceive these results to be negative, the market price for our common stock could be significantly harmed. Such litigation or proceedings could substantially increase our operating losses and reduce the resources available for development activities or any future sales, marketing or distribution activities.

Most of our competitors are larger than we are and have substantially greater resources. They are, therefore, likely to be able to sustain the costs of complex patent litigation or other intellectual property proceedings longer than we could. Accordingly, despite our efforts, we may not be able to prevent third parties from infringing upon or misappropriating our intellectual property. In addition, the uncertainties associated with the initiation and continuation of litigation or other intellectual property proceedings could compromise our ability to raise the funds necessary to continue our clinical studies, continue our internal research programs, or in-license needed technology, or otherwise have a material adverse effect on our business, financial condition, results of operations and prospects.

AEON US Equity

AEON · 10-K · period ended 2023-12-31

Item 1A. Risk Factors

AEON US Equity☆

AEON · 10-K · period ended 2023-12-31

Item 1A. Risk Factors

AEON US Equity