Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with the consolidated financial statements and related notes included elsewhere in this report. Refer to Part II, Item 7 in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (filed with the SEC on March 12, 2024) for additional discussion of our financial condition and results of operations for the year ended December 31, 2023, as well as our financial condition and results of operations for the year ended December 31, 2023 compared to the year ended December 31, 2022. In addition to historical information, the following discussion and other parts of this Annual Report contain forward-looking information that involves risks and uncertainties.

Overview

SIGA Technologies, Inc. (“SIGA” or the “Company”) is a commercial-stage pharmaceutical company. The Company sells its lead product, TPOXX® (“oral TPOXX®,” also known as "tecovirimat," "Tecovirimat SIGA," or "TEPOXX (tecovirimat)" in certain international markets), to the U.S. Government and international governments (including government affiliated entities). In certain international markets, the Company may sell TPOXX® through a distributor. Additionally, the Company sells the intravenous formulation of TPOXX® ("IV TPOXX®") to the U.S. Government.

TPOXX® is an antiviral drug for the treatment of human smallpox disease caused by variola virus. On July 13, 2018, the United States Food & Drug Administration (“FDA”) approved oral TPOXX® for the treatment of smallpox. The Company has been delivering oral TPOXX® to the U.S. Strategic National Stockpile ("Strategic Stockpile") since 2013.

On May 18, 2022 the FDA approved IV TPOXX® for the treatment of smallpox.

In addition to being approved by the FDA, oral TPOXX® (tecovirimat) has received regulatory approval from the European Medicines Agency ("EMA"), Health Canada, the Medicines and Healthcare Products Regulatory Agency ("MHRA") of the United Kingdom, and most recently, in December 2024, the Japanese Pharmaceuticals and Medical Devices Agency ("PMDA"). The EMA, MHRA and PMDA approved oral TPOXX® for the treatment of smallpox, monkeypox ("mpox"), cowpox, and vaccinia complications following vaccination against smallpox. Health Canada approved TPOXX® for the treatment of smallpox.

With respect to the regulatory approvals by the EMA, PMDA, MHRA and Health Canada, oral tecovirimat represents the same formulation approved by the FDA in July 2018 under the brand name TPOXX®.

In connection with a potential FDA label expansion of oral TPOXX® for an indication covering smallpox post-exposure prophylaxis (“PEP”), the Company has completed an immunogenicity trial and an expanded safety trial. The timing of a potential submission of a supplemental New Drug Application to the FDA (“Supplemental NDA”) for a smallpox PEP indication for oral TPOXX® will be based on the results of ongoing sample analyses from the immunogenicity trial; the Company is currently targeting a Supplemental NDA submission in the next twelve months.

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Procurement Contracts with the U.S. Government

19C BARDA Contract

On September 10, 2018, the Company entered into a contract with the U.S. Biomedical Advanced Research and Development Authority ("BARDA") pursuant to which SIGA agreed to deliver up to 1,488,000 courses of oral TPOXX® to the Strategic Stockpile, and to manufacture and deliver to the Strategic Stockpile, or store as vendor-managed inventory, up to 212,000 courses of IV TPOXX®. In October 2023, the contract was modified so that a course of IV TPOXX® was redefined within the contract from being 14 vials to being 28 vials; as such, the 19C BARDA Contract currently specifies 106,000 courses of IV TPOXX® (for the same payment amount as originally specified). In addition to the delivery of TPOXX® courses, the contract includes funding from BARDA for a range of activities, including: advanced development of IV TPOXX®, post-marketing activities for oral and IV TPOXX®, development for a pediatric formulation, and procurement activities. As of December 31, 2024, the contract with BARDA (as amended, modified, or supplemented from time to time, the "19C BARDA Contract") contemplates up to approximately $602.5 million of payments, of which approximately $51.7 million of payments are included within the base period of performance, approximately $519.6 million of payments are related to exercised options and up to approximately $31.2 million of payments are currently specified as unexercised options. BARDA may choose in its sole discretion when, or whether, to exercise any of the unexercised options. The period of performance for options is up to ten years from the date of entry into the 19C BARDA Contract and such options could be exercised at any time during the contract term.

The base period of performance specifies potential payments of approximately $51.7 million for the following activities: payments of approximately $11.1 million for the delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile; payments of $8.0 million for the manufacture of 10,000 courses (as currently defined within the contract as being 28 vials) of final drug product of IV TPOXX® ("IV FDP"), of which $3.2 million of payments are related to the manufacture of bulk drug substance ("IV BDS") to be used in the manufacture of IV FDP; payments of approximately $32.0 million to fund reimbursed activities; and payments of approximately $0.6 million for supportive procurement activities. As of December 31, 2024, the Company had received $11.1 million for the delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile, $3.2 million for the manufacture of IV BDS, $4.8 million for the delivery of IV FDP to the Strategic Stockpile and $25.3 million for other base period activities. IV BDS has been used for the manufacture of courses of IV FDP. The $3.2 million received for the completed manufacture of IV BDS had been recorded as deferred revenue as of December 31, 2021, but with the delivery of IV FDP to the Strategic Stockpile during 2022, $2.9 million was recognized as revenue. The remaining $0.3 million of deferred revenue was recognized in the second quarter of 2024 as the IV FDP containing such IV BDS was delivered to and accepted by the Strategic Stockpile.

The options that have been exercised as of December 31, 2024, provide for payments up to approximately $519.6 million. As of December 31, 2024, there are exercised options for the following activities: payments up to $450.2 million for the manufacture and delivery of up to 1.5 million courses of oral TPOXX®; payments up to $51.2 million for the manufacture of courses of IV FDP, of which $20.5 million of payments relate to the manufacture of IV BDS to be used in the manufacture of IV FDP; payments of up to approximately $3.6 million to fund post-marketing activities for IV TPOXX®; and payments of up to $14.6 million for funding of post-marketing activities for oral TPOXX®. As of December 31, 2024, a cumulative total of $396.9 million of oral TPOXX® has been delivered to the Strategic Stockpile and accepted, of which approximately $15 million was delivered in the first quarter of 2024, approximately $8 million was delivered in the third quarter of 2024, and approximately $51 million was delivered in the fourth quarter of 2024; a cumulative total of $25.4 million of IV FDP has been delivered to the Strategic Stockpile and accepted, of which approximately $17 million of revenue (including recognition of deferred revenue) was recorded in the second quarter of 2024 and approximately $8 million of revenue (including recognition of deferred revenue) was recorded in the fourth quarter of 2024; $10.3 million has been received for the manufacture of IV BDS (such amount is recorded as deferred revenue); and the Company has been cumulatively reimbursed $9.4 million in connection with post-marketing activities for oral and IV TPOXX®.

Unexercised options specify potential payments up to approximately $31.2 million in total (if all such options are exercised), of which approximately $5.6 million relates to supportive activities that we currently do not expect to be required. The remaining unexercised options specify payments of up to $25.6 million for the manufacture of courses of IV FDP, of which up to $10.2 million of payments would be paid upon the manufacture of IV BDS to be used in the manufacture of IV FDP.

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The options related to IV TPOXX® are divided into two primary manufacturing steps. There are options related to the manufacture of bulk drug substance (“IV BDS Options”), and there are corresponding options (for the same number of IV courses) for the manufacture of final drug product (“IV FDP Options”). BARDA may choose to exercise any, all, or none of these options in its sole discretion. The 19C BARDA Contract includes: three separate IV BDS Options, each providing for the bulk drug substance equivalent of 32,000 courses (as currently defined within the contract) of IV TPOXX®; and three separate IV FDP Options, each providing for 32,000 courses of final drug product of IV TPOXX®. BARDA has the sole discretion as to whether to simultaneously exercise IV BDS Options and IV FDP Options, or whether to exercise options at different points in time (or alternatively, to only exercise the IV BDS Option but not the IV FDP Option). To date, BARDA has exercised two of the three IV BDS options and two of the three IV FDP options. If BARDA decides only to exercise the remaining IV BDS Option, then the Company would receive payments up to $10.2 million; alternatively, if BARDA decides to exercise the remaining IV BDS Option and IV FDP Option, then the Company would receive payments up to $25.6 million. BARDA may also decide not to exercise either remaining option. For each set of options relating to a specific group of courses (for instance, the IV BDS and IV FDP options that reference the same 32,000 courses), BARDA has the option to independently purchase IV BDS or IV FDP. The Company estimates that sales of the IV formulation under this contract (under current terms), assuming the remaining IV FDP Option was exercised, would have a gross margin (sales less cost of sales, as a percentage of sales) that is less than 40%.

U.S. Department of Defense Procurement Contracts

In 2024, the Company had sales of approximately $10 million with the U.S. Department of Defense ("DoD"). Sales consist mostly of delivery of oral TPOXX®, with a minor amount of IV TPOXX® delivered.

In 2023, the Company had sales of approximately $11 million with the DoD. Sales consist of delivery of oral TPOXX®.

Over the past three years, the Company has received three procurement contracts from the DoD, including a $9 million contract in August 2024, which has been fulfilled.

International Sales Activity

In the year ended December 31, 2024, the Company had international sales of $23.0 million consisting of deliveries of oral TPOXX® to 13 countries. For international sales in the first and second quarters, Meridian Medical Technologies ("Meridian") was the counterparty to contracts under which the sales were made (see discussion and definition below regarding International Promotion Agreement). For international sales in the third and fourth quarters, the Company was the counterparty to the contracts under which the sales were made.

In the year ended December 31, 2023, the Company had international sales of $21.3 million consisting of deliveries of oral TPOXX® to seven countries.

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International Promotion Agreement

Under the terms of the current International Promotion Agreement, which was amended on March 27, 2024, and effective June 1, 2024, and further amended on August 30, 2024, the Company has primary responsibility for the advertising, promotion and sale of oral TPOXX® in all geographic regions. Meridian has limited, non-exclusive rights to advertise, promote, offer for sale and sell oral TPOXX® in the European Economic Area, Australia, Japan, Switzerland, the United Kingdom and the Association of Southeast Asian Nations and its member states (collectively, the “Current Territory”). Meridian also performs non-promotional activities under specified contracts with third parties entered into prior to June 1, 2024, that provide for the sale of oral TPOXX® in the Current Territory. The International Promotion Agreement entitles Meridian to receive a fee equal to a high single digit percentage of collected proceeds (whether collected by Meridian or the Company), net of certain expenses, of sales of oral TPOXX® in the Current Territory in the field of use specified in the International Promotion Agreement. The International Promotion Agreement has a fixed term that expires on May 31, 2026, with no automatic renewal.

Under the terms of the original International Promotion Agreement ("Pre-amendment International Promotion Agreement"), which had an initial term that expired on May 31, 2024, Meridian had been granted exclusive rights to market, advertise, promote, offer for sale, or sell oral TPOXX® in a field of use specified in the International Promotion Agreement in all geographic regions except for the United States (the “Territory”), and Meridian agreed not to commercialize any competing product, as defined in the Pre-amendment International Promotion Agreement, in the specified field of use in the Territory. Under the Pre-amendment International Promotion Agreement, as well as the current International Promotion Agreement, SIGA has always retained ownership, intellectual property, distribution and supply rights and regulatory responsibilities in connection with TPOXX®, and, in the United States market, also retained sales and marketing rights with respect to oral TPOXX®. SIGA’s consent is required prior to the entry by Meridian into any sales arrangement pursuant to the International Promotion Agreement.

Sales to international customers pursuant to the Pre-amendment International Promotion Agreement were invoiced and collected by Meridian, and such collections were remitted, less Meridian's fees, to the Company under a quarterly process specified in the Pre-amendment International Promotion Agreement; and Meridian was entitled to a specified percentage of the collected proceeds of sales of oral TPOXX®, net of certain expenses, for calendar years in which customer collected amounts net of such expenses were less than or equal to a specified threshold, and to a higher specified percentage of such collected net proceeds for calendar years in which such net collected amounts exceeded the specified threshold. Subsequent to June 1, 2024, only specified procurement contracts for the Current Territory entered into prior to June 1, 2024, continue to involve Meridian invoicing and collecting proceeds, and retaining a fee pursuant to the International Promotion Agreement.

Mpox

In connection with the 2022 response to a global mpox outbreak, a series of observational and randomized, placebo-controlled clinical trials were initiated to assess the safety and efficacy of TPOXX® in participants with mpox. The purpose of these randomized clinical trials is to seek to collect data on the potential benefits of using TPOXX® as an antiviral treatment for active mpox disease. As of December 31, 2024, two of the randomized, placebo-controlled clinical trials reported preliminary topline results: a randomized, placebo-controlled clinical trial in the Democratic Republic of the Congo ("DRC") known as PALM 007 (Tecovirimat for Treatment of Monkeypox Virus - NCT05559099), which is funded and sponsored by the National Institutes of Health's (NIH) National Institute of Allergy and Infectious Diseases (NIAID); and the Study of Tecovirimat for Human Mpox Virus (STOMP) clinical trial (NCT05534984), which is a randomized, placebo-controlled, double-blind study sponsored and funded by NIAID to evaluate the safety and efficacy of tecovirimat for the treatment of people with laboratory-confirmed or presumptive mpox disease that included enrollees from Argentina, Brazil, Japan, Mexico, Peru, Thailand, and the United States. The PALM 007 study did not meet its primary endpoint of a statistically significant improvement in time to lesion resolution within 28 days post-randomization for patients in the DRC with mpox who received TPOXX® compared to patients who received placebo. Some improvement versus placebo was observed in patients receiving TPOXX® whose symptoms began seven days or fewer before randomization and patients with severe or grave disease, defined by the World Health Organization (WHO) as having 100 or more skin lesions, however the significance of these data have not been established. An interim analysis of data from the STOMP study showed that TPOXX® did not demonstrate efficacy in time to skin and mucosal lesion resolution compared to placebo in patients with mild to moderate clade II mpox. Based on this result and additional analyses, the study Data Safety and Monitoring Board (DSMB) recommended to stop enrolling patients in the randomized arms of the study. NIAID accepted this recommendation and subsequently decided to take a similar action in the open label arm of this study, which included severe and at-risk of developing severe disease patients. Data analysis is not yet complete for primary endpoint subgroups and detailed secondary and exploratory endpoints. In both studies, TPOXX® exhibited a safety profile comparable to placebo. These safety results are consistent with prior studies and further support the strong safety profile that has been observed with tecovirimat over the past 15 years.

Three randomized clinical trials, UNITY (Switzerland, Brazil, Argentina), Platinum-CAN (Canada), and EPOXI (EU), are enrolling mpox patients. Given the STOMP and PALM007 results and the design similarities across these mpox trials, the Company believes these ongoing trials are likely to yield similar results.

Research Agreements and Grants

In July 2019, the Company was awarded a multi-year research contract ultimately valued at approximately $27 million from the DoD to support work in pursuit of a potential label expansion for oral TPOXX® that would include post-exposure prophylaxis ("PEP") of smallpox (such work known as the "PEP Label Expansion Program" and the contract referred to as the "PEP Label Expansion R&D Contract"). As of December 31, 2023, the Company invoiced the full amount of available funding, and as a result, there is no remaining revenue to be recognized in the future under the PEP Label Expansion R&D Contract. Revenue from the performance obligation under the PEP Label Expansion R&D Contract was recognized over time using an input method using costs incurred to date relative to total estimated costs at completion.

Contracts and grants include, among other things, options that may or may not be exercised at the U.S. Government’s discretion. Moreover, contracts and grants contain customary terms and conditions including the U.S. Government’s right to terminate or restructure a contract or grant for convenience at any time. As such, the Company may not be eligible to receive all available funds.

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Critical Accounting Estimate

The methods, estimates and judgments we use in applying our accounting policies have a significant impact on the results we report in our consolidated financial statements, which we discuss under the heading “Results of Operations” following this section of our Management’s Discussion and Analysis of Financial Condition and Results of Operations. Some of our accounting policies require us to make difficult and subjective judgments, often as a result of the need to make estimates of matters that are inherently uncertain. Our most critical accounting estimate is revenue recognition over time.

Revenue Recognition

We account for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”). The unit of account in ASC 606 is a performance obligation. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. Our performance obligations are satisfied over time as work progresses or at a point in time. Revenue connected with performance obligations related to product delivery and supportive services are recognized at a point in time. Revenue connected with performance obligations related to research and development are recognized over time.

Due to the nature of the work required to be performed on many of our performance obligations for which revenue is recognized over time, the estimation of total revenue and costs to satisfy the obligations may be complex, subject to many variables and requires significant judgment. The consideration associated with these types of performance obligations is considered variable. We estimate variable consideration as the most likely amount to which we expect to be entitled. We include estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur and when any uncertainty associated with variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our historical and anticipated performance, external factors, trends and all other information (historical, current and forecasted) that is reasonably available to us.

Contracts are often modified to account for additional services to be performed. We consider contract modifications to exist when the modification either creates new enforceable rights and obligations, or changes existing enforceable rights and obligations. If the effect of a contract modification on the transaction price changes our measure of progress for the performance obligation to which it relates, the impact will be recognized in the period of modification as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis.

We have a process in which management reviews the progress and execution of our performance obligations. As part of this process, management reviews information including, but not limited to, any outstanding key contract matters, progress towards completion and the related program schedule, identified risks and opportunities and the related changes in estimates of revenues and costs. The risks and opportunities include management’s judgment about the ability and cost to achieve the schedule, technical requirements and other contract requirements. Management must make assumptions and estimates regarding labor productivity, the complexity of the work to be performed, customer behavior and execution by our subcontractors, among other variables.

Based on this analysis, any quarterly adjustments to revenues, research and development expenses and cost of sales and supportive services are recognized as necessary in the period they become known. Changes in estimates of revenues, research and development expenses and cost of sales and supportive services are recognized quarterly on a cumulative catch-up basis, which recognizes in the current period the cumulative effect of the changes on current and prior periods based on a performance obligation’s percentage of completion. A significant change in one or more of these estimates could affect the profitability of one or more of our performance obligations.

Recently Issued Accounting Pronouncements

For discussion regarding the impact of accounting standards that were recently issued but are not yet effective, on our consolidated financial statements, see Note 2, Summary of Significant Accounting Policies, to the consolidated financial statements.

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Results of Operations for the Years ended December 31, 2024 and 2023

Revenues from product sales and supportive services for the years ended December 31, 2024 and 2023 were $133.3 million and $130.7 million, respectively. Such revenues for the year ended December 31, 2024 include $73.9 million of oral TPOXX® sales and $26.2 million of IV TPOXX® sales to the U.S. Government under the 19C BARDA Contract; $23.0 million related to international sales of oral TPOXX®; and approximately $10.1 million of oral TPOXX® sales to the DoD. Such revenues for the year ended December 31, 2023 include $97.9 million of oral TPOXX® sales to the U.S. Government under the 19C BARDA Contract; $21.3 million related to international sales of oral TPOXX®; and approximately $10.7 million of oral TPOXX® sales to the DoD.

Revenues from research and development activities for the years ended December 31, 2024 and 2023, were $5.4 million and $9.2 million, respectively. The revenues for the year ended December 31, 2024, were mostly earned in connection with performance of research and development activities under the 19C BARDA Contract. The revenue for the year ended December 31, 2023, were mostly earned in connection with performance of research and development activities under the PEP Label Expansion R&D Contract and the 19C BARDA Contract. The decrease of $3.8 million of revenue is related to the completion of billable activities under the PEP Label Expansion R&D Contract in 2023.

Cost of sales and supportive services for the years ended December 31, 2024 and 2023 were $31.3 million and $17.8 million, respectively. Such costs in 2024 were primarily associated with the manufacture and delivery of oral TPOXX® courses to the U.S. Government, DoD and various international customers as well as the manufacture and delivery of IV TPOXX® courses to the U.S. Government. Such costs in 2023 were associated with the manufacturing and delivery of oral TPOXX® to the U.S. Government as well as various international countries. The difference in costs between years is primarily due to the inclusion of IV TPOXX® in 2024 sales; manufacturing costs for IV TPOXX® are significantly higher than manufacturing costs for oral TPOXX®.

Selling, general and administrative expenses for the years ended December 31, 2024 and 2023 were $25.1 million and $22.0 million, respectively. The increase of $3.1 million reflects higher compensation expense, including stock-based compensation, associated with the hiring of multiple executive officers in 2024.

Research and development expenses were $12.3 million for the year ended December 31, 2024, a decrease of approximately $4.1 million from the $16.4 million incurred during the year ended December 31, 2023. The decrease is primarily attributable to lower direct vendor-related expenses incurred in connection with a decrease in activities under the PEP Label Expansion R&D Contract, partially offset by an increase in compensation expense in connection with new hires.

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Other income, net for the years ended December 31, 2024 and 2023 was $6.1 million and $4.2 million, respectively. The increase relates to interest income earned on cash and cash equivalents as the average cash balance during the year ended December 31, 2024 was higher than in 2023. Additionally, the average investment return rates in the year ended December 31, 2024 were higher than those in 2023.

For the year ended December 31, 2024, we recognized a tax provision of $16.9 million on pre-tax income of $76.1 million. Our effective tax rate for the year ended December 31, 2024 was 22.2% and differs from the statutory rate of 21% primarily as a result of non-deductible executive compensation under IRC Section 162(m), shortfalls on stock-based compensation, and state and local taxes.

For the year ended December 31, 2023, we recognized a tax provision of $19.7 million on pre-tax income of $87.8 million. Our effective tax rate for the year ended December 31, 2023 was 22.5% and differs from the statutory rate of 21% primarily as a result of non-deductible executive compensation under IRC Section 162(m), and state and local taxes.

Liquidity and Capital Resources

As of December 31, 2024, we had $155.4 million in cash and cash equivalents, compared with $150.1 million at December 31, 2023. We believe that our liquidity and capital resources will be sufficient to meet our anticipated requirements for at least the next twelve months from the issuance of these financial statements.

Operating Activities

We prepare our consolidated statement of cash flows using the indirect method. Under this method, we reconcile net income to cash flows from operating activities by adjusting net income for those items that impact net income but may not result in actual cash receipts or payments during the period. These reconciling items include but are not limited to stock-based compensation, deferred income taxes and changes in the fair value of our warrant liability; gains and losses from various transactions and changes in the consolidated balance sheet for working capital from the beginning to the end of the period.

Net cash provided by operations for the years ended December 31, 2024 and 2023 was $48.8 million and $94.8 million, respectively. For the year ended December 31, 2024, net cash increase from operations is due to the receipt of approximately $122.5 million from sales of oral and IV TPOXX® to the U.S. Government and international customers, of which approximately $102 million relates to 2024 sales and the remainder to collection of accounts receivable on the December 31, 2023 balance sheet, partially offset by the payment of approximately $30 million of income taxes as well as the use of cash for customary operating activities. For the year ended December 31, 2023, the receipt of substantially all of the $45 million of accounts receivable as of December 31, 2022, the receipt of approximately $111 million of 2023 product sales of oral TPOXX®, as well as approximately $10 million received in connection with IV BDS deferred revenue was partially offset by the use of cash to proactively build inventory, and for operating activities.

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On December 31, 2024 and 2023, our accounts receivable balance was approximately $21.2 million (which includes approximately $0.5 million of unbilled receivables) and $21.1 million, respectively. Our accounts receivable balance as of December 31, 2024 primarily reflects sales of oral TPOXX® to various international countries and the DoD, of which approximately $20.1 million was received by the Company through the end of February 2025. The remaining amounts of the receivable balance are expected to be collected during the first or second quarter of 2025. Our accounts receivable balance as of December 31, 2023 primarily reflected sales of oral TPOXX® to the U.S. Government under the 19C BARDA Contract as well as various international countries, of which approximately $11.2 million was received by the Company through the end of February 2024. The remaining amounts of the receivable balance were collected during the second quarter of 2024.

Investing Activities

We used $42,450 and $21,686 for capital expenditures for the years ended December 31, 2024 and 2023, respectively.

Financing Activities

Cash used in financing activities for the years ended December 31, 2024 and 2023 was $43.5 million and $43.4 million, respectively. For the year ended December 31, 2024, we paid a special dividend of approximately $42.7 million as well as approximately $0.8 million associated with the payment of tax obligations for employee common stock tendered. For the year ended December 31, 2023, we paid a special dividend of approximately $32.1 million. In addition, we purchased approximately 1.7 million shares of common stock for approximately $11.0 million.

Future Cash Requirements

As of December 31, 2024, we have outstanding purchase orders associated with manufacturing obligations in the aggregate amount of approximately $2.4 million.

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Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Our investment portfolio includes cash and cash equivalents. Our main investment objective is the preservation of investment capital. We believe that our investment policy is conservative, both in the duration of our investments and the credit quality of the investments we hold. We do not utilize derivative financial instruments, derivative commodity instruments or other market risk sensitive instruments, positions or transactions to manage exposure to interest rate changes. As such, we believe that the securities we hold are subject to market risk, changes in the financial standing of the issuer of such securities and our interest income is sensitive to changes in the general level of U.S. interest rates.

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Item 8. Financial Statements and Supplementary Data

Index to the Consolidated Financial Statements

Report of Independent Registered Public Accounting Firm (PCAOB ID 238) 42

Consolidated Balance Sheets 44

Consolidated Statements of Operations and Comprehensive Income 45

Consolidated Statements of Changes in Stockholders’ Equity 46

Consolidated Statements of Cash Flows 47

Notes to Consolidated Financial Statements 48

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Report of Independent Registered Public Accounting Firm

TotheBoard of Directors and Stockholders of SIGA Technologies, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of SIGA Technologies, Inc. and its subsidiaries (the "Company") as of December 31, 2024 and 2023, and the related consolidated statements of operations and comprehensive income, of changes in stockholders’ equity and of cash flows for each of the three years in the period ended December 31, 2024, including the related notes (collectively referred to as the "consolidated financial statements"). We also have audited the Company's internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Report on Internal Control over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

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Revenue Recognition

As described in Note 2 to the consolidated financial statements, the Company’s revenue was $138.7 million for the year ended December 31, 2024. The Company’s performance obligations are satisfied at a point in time or over time as work progresses. As disclosed by management, revenue connected with performance obligations related to product delivery and supportive services are recognized at a point in time. The Company’s revenue related to current research and development performance obligations is recognized over time, because the customer simultaneously receives and consumes the benefits provided by the services as the Company performs these services. Management recognizes revenue related to these services based on the progress toward complete satisfaction of the performance obligation and measures this progress under an input method, which is based on the Company’s cost incurred relative to total estimated costs.

The principal consideration for our determination that performing procedures relating to revenue recognition is a critical audit matter is a high degree of auditor effort in performing procedures related to the Company’s revenue recognition.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included testing the effectiveness of controls relating to the revenue recognition process, including controls over the recording of revenue at the transaction price once the performance obligations are satisfied. These procedures also included, among others (i) testing the completeness, accuracy and occurrence of product sales and supportive services revenue recognized for a sample of revenue transactions by obtaining and inspecting source documents, such as contracts, invoices, shipping and delivery documents and subsequent cash receipts; (ii) for research and development revenue, testing management’s process for determining the estimated costs to completely satisfy each performance obligation for a sample of contracts by (a) comparing the underlying cost estimates to approved contracts or modifications; (b) comparing the underlying transaction price to original contracts or modifications; and (c) testing actual costs incurred and their eligibility for billing under the respective contracts; and (iii) confirming a sample of outstanding customer invoice balances as of December 31, 2024.

/s/ PricewaterhouseCoopers LLP

Florham Park, New Jersey

March 11, 2025

We have served as the Company’s auditor since 1997.

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SIGA TECHNOLOGIES, INC.

CONSOLIDATED BALANCE SHEETS

As of

ASSETS

Current assets

LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities

Commitments and contingencies (Note 12)

Stockholders' equity

The accompanying notes are an integral part of these financial statements.

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SIGA TECHNOLOGIES, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME

For the Years Ended December 31

Revenues

Operating expenses

Gain from change in fair value of warrant liability — — 400,663

Diluted earnings per share $ 0.82 $ 0.95 $ 0.46

The accompanying notes are an integral part of these financial statements.

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SIGA TECHNOLOGIES, INC.

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

For the Years Ended December 31, 2024, 2023 and 2022

Accumulated

Additional Other Total

Common Stock Paid-In Accumulated Comprehensive Stockholders’

Shares Amount Capital Deficit Income (Loss) Equity

Issuance of common stock upon vesting of RSUs 132,396 13 (13 ) — — —

Issuance of common stock upon exercise of stock options 8,672 — — — — —

Issuance of common stock upon vesting of RSUs 144,576 15 (15 ) — — —

Issuance of common stock 49,940 5 (5 ) — — —

Issuance of common stock upon vesting of RSUs 369,142 37 (37 ) — — —

The accompanying notes are an integral part of these financial statements.

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SIGA TECHNOLOGIES, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Years Ended December 31

Cash flows from operating activities:

Gain on change in fair value of warrant liability — — (400,663 )

Changes in assets and liabilities:

Cash flows from investing activities:

Cash used in investing activities (42,450 ) (21,686 ) —

Cash flows from financing activities:

Supplemental disclosure of cash flows information:

Non-cash lease right-of-use asset and associated liability $ 462,686 $ — $ —

Conversion of warrant to common stock $ — $ — $ 6,120,778

Issuance of common stock $ 417,000 $ — $ —

Issuance of common stock upon cashless exercise $ — $ 87,540 $ —

The accompanying notes are an integral part of these financial statements

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SIGA TECHNOLOGIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.Organization and Basis of Presentation

Description of Business

TPOXX® is an antiviral drug for the treatment of human smallpox disease caused by variola virus. On July 13, 2018, the United States Food & Drug Administration (“FDA”) approved the oral formulation of TPOXX® for the treatment of smallpox. The Company has been delivering oral TPOXX® to the U.S. Strategic National Stockpile ("Strategic Stockpile") since 2013.

On May 18, 2022 the FDA approved IV TPOXX® for the treatment of smallpox.

With respect to the regulatory approvals by the EMA, PMDA, MHRA and Health Canada, oral tecovirimat represents the same formulation approved by the FDA in July 2018 under the brand name TPOXX®.

2.Summary of Significant Accounting Policies

Use of Estimates

Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and revenues and expenses during the periods reported. The most significant estimates are the variables used in the calculation of reported amounts of revenue recognized over time. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the financial statements in the period they are determined to be necessary. Actual results could differ from these estimates.

Basis of Presentation and Consolidation

The accompanying consolidated financial statements include the accounts of SIGA Technologies, Inc. and its wholly owned subsidiaries. All inter-company accounts and transactions have been eliminated in consolidation. The consolidated financial statements and related disclosures are presented in accordance with generally accepted accounting principles in the United States of America (“US GAAP”) and reflect the consolidated financial position, results of operations and cash flows for all periods presented.

Reclassifications

Certain reclassifications have been made to prior year amounts to conform to the current year's presentation.

Cash Equivalents

The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents.

Concentration of Credit Risk

The Company has cash in bank accounts that exceeds the Federal Deposit Insurance Corporation insured limits. The Company has not experienced any losses on its cash accounts and no allowance has been provided for potential credit losses because management believes the potential for losses is remote.

Collection of certain receivables from international government sales are coordinated through the International Promotion Agreement with Meridian Medical Technologies ("Meridian") (see Note 3), under which Meridian invoices and collects payments from international customers and remits such collections, less Meridian's fees, to the Company under a quarterly process specified in the International Promotion Agreement.

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Accounts Receivable

Accounts receivable are recorded net of provisions for doubtful accounts. At December 31, 2024 and 2023, 45% and 53%, respectively, of accounts receivable represent receivables from the U.S. Government. At December 31, 2024, most of the remaining balance in accounts receivable represent receivables from international sales, which include sales to two European governments and a government in the Asia Pacific region. An allowance for doubtful accounts is based on specific analysis of the receivables. At December 31, 2024 and 2023, the Company had no allowance for doubtful accounts.

Inventory

Inventory is stated at the lower of cost or net realizable value. The cost is determined using the first-in, first-out (FIFO) method. The Company capitalizes inventory costs associated with the Company’s products when, based on management’s judgment, future commercialization is considered probable and the future economic benefit is expected to be realized; otherwise, such costs are expensed as research and development. Inventory is evaluated for impairment periodically to identify inventory that may expire prior to expected sale or has a cost basis in excess of its net realizable value. If certain batches or units of product do not meet quality specifications or become obsolete due to expiration, the Company records a charge to write down such unmarketable inventory to its net realizable value.

Property, Plant and Equipment

Property, plant and equipment are stated at cost, net of accumulated depreciation. Depreciation and amortization are provided on a straight-line method over the estimated useful lives of the various asset classes. The estimated useful lives are as follows: five years for laboratory equipment; three years for computer equipment; and seven years for furniture and fixtures. Leasehold improvements are amortized over the shorter of the estimated useful lives of the assets or the lease term. Maintenance, repairs and minor replacements are charged to expense as incurred.

Warrant Liability

The Company accounted for warrants in accordance with the authoritative guidance which requires that free-standing derivative financial instruments with certain cash settlement features be classified as assets or liabilities at the time of the transaction, and recorded at their fair value. Fair value was estimated using model-derived valuations. Any changes in the fair value of the derivative instruments were reported in earnings or loss as long as the derivative contracts were classified as assets or liabilities. During 2022, the warrant was fully exercised and therefore there were no remaining underlying shares as of December 31, 2022.

The following table presents changes in the liability-classified warrant:

Fair Value of liability-classified warrant

Decrease in fair value of warrant liability (400,663 )

Warrant liability at December 31, 2022 $ —

Revenue Recognition

The Company accounts for revenue in accordance with ASC Topic 606,Revenue from Contracts with Customers (“ASC 606”).

Performance Obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account in ASC 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. As of December 31, 2024, the Company's active performance obligations, for the contracts outlined in Note 3, consist of the following: four performance obligations relate to research and development services; and four relate to manufacture and delivery of product.

Contract modifications may occur during the course of performance of our contracts. Contracts are often modified to account for changes in contract specifications or requirements. In most instances, contract modifications are for services that are not distinct, and, therefore, are accounted for as part of the existing contract.

The Company’s performance obligations are satisfied over time as work progresses or at a point in time. A portion of the Company’s revenue is derived from long-term contracts that span multiple years. All of the Company’s revenue related to current research and development performance obligations is recognized over time, because the customer simultaneously receives and consumes the benefits provided by the services as the Company performs these services. The Company recognizes revenue related to these services based on the progress toward complete satisfaction of the performance obligation and measures this progress under an input method, which is based on the Company’s cost incurred relative to total estimated costs. Under this method, progress is measured based on the cost of resources consumed (i.e., cost of third-party services performed, cost of direct labor hours incurred, and cost of materials consumed) compared to the total estimated costs to completely satisfy the performance obligation. Incurred costs represent work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. The incurred and estimated costs used in the measure of progress include third-party services performed, direct labor hours, and material consumed. The Company accounts for shipping and handling activities as fulfillment costs rather than as an additional promised service.

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Contract Estimates. Accounting for long-term contracts and grants involves the use of various techniques to estimate total contract revenue and costs.

Contract estimates are based on various assumptions to project the outcome of future events that often span multiple years. These assumptions include: labor productivity; the complexity of the work to be performed; external factors such as customer behavior and potential regulatory outcomes; and the performance of subcontractors, among other variables.

The nature of the work required to be performed on many of the Company’s performance obligations and the estimation of total revenue and cost at completion may be complex, subject to many variables and require significant judgment. The consideration associated with research and development services is variable as the total amount of services to be performed has not been finalized. The Company estimates variable consideration as the most likely amount to which it expects to be entitled. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur and when any uncertainty associated with variable consideration is resolved. The Company’s estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our historical and anticipated performance, external factors, trends and all other information (historical, current and forecasted) that is reasonably available to us.

A significant change in one or more of these estimates could affect the profitability of the Company’s contracts. As such, the Company reviews and updates its contract-related estimates regularly. The Company recognizes adjustments in estimated revenues, research and development expenses and cost of sales and supportive services under the cumulative catch-up method. Under this method, the impact of the adjustment on revenues, research and development expenses and cost of sales and supportive services recorded to date on a contract is recognized in the period the adjustment is identified.

Contract Balances. The timing of revenue recognition, billings and cash collections may result in billed accounts receivable, unbilled receivables (contract assets) and customer advances and deposits (contract liabilities) in the consolidated balance sheets. Generally, amounts are billed as work progresses in accordance with agreed-upon contractual terms either at periodic intervals (monthly) or upon achievement of contractual milestones; as of December 31, 2024, the accounts receivable balance in the balance sheet includes approximately $0.5 million of unbilled receivables. Under typical payment terms of fixed price arrangements, the customer pays the Company either performance-based payments or progress payments. For the Company’s cost-type arrangements, the customer generally pays the Company for its actual costs incurred, as well as its allocated overhead and G&A costs. Such payments occur within a short period of time from billing. When the Company receives consideration, or such consideration is unconditionally due, prior to transferring goods or services to the customer under the terms of a sales contract, the Company records deferred revenue, which represents a contract liability. During the year ended December 31, 2024, the Company recognized revenue of $10.8 million that was included in deferred revenue at the beginning of the period.

Remaining Performance Obligations. Remaining performance obligations represent the transaction price for which work has not been performed and excludes unexercised contract options. As of December 31, 2024, the aggregate amount of transaction price allocated to remaining performance obligations was $92.8 million. With respect to current obligations related to the manufacture and delivery of product, the Company expects such obligations to be mostly recognized as revenues within the next 12 months. With respect to the performance obligations related to research and development services, the Company expects such obligations to be recognized as revenue within the next three years as the specific timing for satisfying performance obligations is subjective and at times outside the Company's control.

Leases

The Company accounts for leases in accordance with ASC 842,Leases (“ASC 842”).

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The Company determines if an arrangement is a lease at inception. Leases with an initial term less than one year are not recorded on the balance sheet and the lease costs are recorded as an expense on a straight-line basis over the lease term. Operating leases with terms greater than one year result in a lease liability recorded in other liabilities with a corresponding right-of-use ("ROU") asset recorded in property, plant and equipment.

Operating lease liabilities are recognized at the commencement date based on the present value of future minimum lease payments over the lease term. ROU assets are recognized based on the corresponding lease liabilities adjusted for qualifying initial direct costs, prepaid or accrued lease payments and unamortized lease incentives. The Company has lease agreements with lease and non-lease components, which are accounted for as a single lease. Lease terms may include options to extend or terminate the lease which are incorporated into the Company's measurement when it is reasonably certain that the Company will exercise the option.

Research and Development

Research and development expenses include costs directly and indirectly attributable to the conduct of research and development programs, and performance pursuant to certain customer contracts, including employee related costs, materials, supplies, depreciation and maintenance of equipment, the cost of services provided by outside contractors, including services related to the Company’s clinical trials and facility costs, such as rent, utilities, and general support services. All costs associated with research and development are expensed as incurred. Costs related to the acquisition of technology rights, for which development work is still in process, and that have no alternative future uses, are expensed as incurred.

Goodwill

The Company evaluates goodwill for impairment at least annually or as circumstances warrant. The impairment review process compares the fair value of the reporting unit in which goodwill resides to its carrying value. The Company operates as one business and one reporting unit. Therefore, the goodwill impairment analysis is performed on the basis of the Company as a whole, using the market capitalization of the Company as an estimate of its fair value.

Share-based Compensation

Stock-based compensation expense for all share-based payment awards made to employees and directors is determined on the grant date; for option awards, fair value was estimated using the Black-Scholes model. These compensation costs are recognized net of an estimated forfeiture rate over the requisite service periods of the awards. Forfeitures are estimated on the date of the respective grant and revised if actual or expected forfeiture activity differs from original estimates.

The fair value of restricted stock unit ("RSU") awards is determined by the value of our common stock and is recognized based on the portion of the requisite service period satisfied as of each valuation date. The fair valuation of the cash-settled awards changes based on changes in our common stock price. The portion of cash-settled RSUs that is recognized based on service period is reflected in accrued expenses and other current liabilities in our consolidated balance sheet. Increases (or decreases) in accrued expenses result in adjustments to earnings for the associated valuation updates.

The fair value of performance based restricted stock unit (“PSU”) awards are based on targets of our stock price. The Company uses a Monte Carlo simulation through a third party on the date of grant to estimate the fair value of the PSUs that are based on market conditions, or market-based PSUs. The compensation expense for PSUs is recognized using an accelerated amortization model.

Income Taxes

The Company recognizes income taxes utilizing the asset and liability method of accounting for income taxes. Under this method, deferred income taxes are recorded for temporary differences between financial statement carrying amounts and the tax basis of assets and liabilities at enacted tax rates expected to be in effect for the years in which the differences are expected to reverse. A valuation allowance is established if it is more likely than not that some or the entire deferred tax asset will not be realized. The recognition of a valuation allowance for deferred taxes requires management to make estimates and judgments about the Company’s future profitability which are inherently uncertain. The Company may recognize tax benefits from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. The tax benefits recognized in the financial statements from such position should be measured based on the largest benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. The Company re-evaluates uncertain tax positions and considers factors, including, but not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken on tax returns, and changes in circumstances related to a tax position. The Company recognizes interest and penalties related to income tax matters in income tax expense.

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Repurchase of shares

When shares recognized as equity are repurchased, the amount of the consideration paid, which includes directly attributable costs, is recognized as a deduction from equity. The excess of the purchase price above par value of repurchased shares that are retired is presented as an increase to accumulated deficit (or a reduction of retained earnings, if any).

Earnings (Loss) per Share

Basic earnings per share is computed by dividing net income (loss) by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income (loss) by the weighted-average number of common shares outstanding during the period, assuming potentially dilutive common shares from option exercises, RSUs, warrants and other incentives had been issued and any proceeds received in respect thereof were used to repurchase common stock at the average market price during the period. The assumed proceeds used to repurchase common stock is the sum of the amount to be paid to the Company upon exercise of options and warrants and the amount of compensation cost attributed to future services not yet recognized.

Fair Value of Financial Instruments

The carrying value of cash and cash equivalents, accounts receivable, accounts payable and accrued expenses and other current liabilities approximates fair value due to the relatively short maturity of these instruments.

The measurement of fair value requires the use of techniques based on observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our market assumptions. The inputs create the following fair value hierarchy:

• Level 1 – Quoted prices for identical instruments in active markets.

There were no transfers between levels of the fair value hierarchy during 2024 or 2023. As of December 31, 2024 and December 31, 2023, the Company had approximately $53.5 million and $95.1 million, respectively, of cash equivalents classified as Level 1 financial instruments. There were no Level 2 or Level 3 financial instruments as of December 31, 2024 or December 31, 2023.

For the years ended December 31, 2024, 2023 and 2022, interest income of $6.1 million, $4.2 million and $1.0 million, respectively, was included in Other income, net on the Consolidated Statements of Operations and Comprehensive Income.

Loss Contingencies

The Company is subject to certain contingencies arising in the ordinary course of business. The Company records accruals for these contingencies to the extent that a loss is both probable and reasonably estimable. If some amount within a range of loss appears to be a better estimate than any other amount within the range, that amount is accrued. Alternatively, when no amount within a range of loss appears to be a better estimate than any other amount, the lowest amount in the range is accrued. The Company expenses legal costs associated with loss contingencies as incurred. We record anticipated recoveries under existing insurance contracts when recovery is assured.

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Segment Information

The Company is managed and operated as one business. The entire business is managed by a single management team that reports to the Chief Executive Officer, who is the Chief Operating Decision Maker ("CODM"). Refer to Note 11 for further information on the Company's reportable segment.

Recent Accounting Pronouncements

In December 2023, the FASB issued ASU 2023-09, which requires disclosure of disaggregated income taxes paid, prescribes standard categories for the components of the effective tax rate reconciliation, and modifies other income tax-related disclosures. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, may be applied prospectively or retrospectively, and allows for early adoption. These requirements are not expected to have an impact on our consolidated financial statements, but will impact our income tax disclosures.

In November 2024, the FASB issued ASU 2024-03,Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, requiring public entities to disclose additional information about specific expense categories in the notes to the consolidated financial statements on an interim and annual basis. ASU 2024-03 is effective for fiscal years beginning after December 15, 2026, and for interim periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact of adopting ASU 2024-03.

3. Procurement Contracts and Research Agreements

19C BARDA Contract

On September 10, 2018, the Company entered into a contract with the U.S. Biomedical Advanced Research and Development Authority ("BARDA") pursuant to which SIGA agreed to deliver up to 1,488,000 courses of oral TPOXX® to the Strategic Stockpile, and to manufacture and deliver to the Strategic Stockpile, or store as vendor-managed inventory, up to 212,000 courses of IV TPOXX®. In October 2023, the contract was modified so that a course of IV TPOXX® was redefined within the contract from being 14 vials to being 28 vials; as such, the 19C BARDA Contract currently specifies 106,000 courses of IV TPOXX® (for the same payment amount as originally specified). In addition to the delivery of TPOXX® courses, the contract includes funding from BARDA for a range of activities, including: advanced development of IV TPOXX®, post-marketing activities for oral and IV TPOXX®, development for a pediatric formulation, and procurement activities. As of December 31, 2024, the contract with BARDA (as amended, modified, or supplemented from time to time, the "19C BARDA Contract") contemplates up to approximately $602.5 million of payments, of which approximately $51.7 million of payments are included within the base period of performance, approximately $519.6 million of payments are related to exercised options, and up to approximately $31.2 million of payments are currently specified as unexercised options. BARDA may choose in its sole discretion when, or whether, to exercise any of the unexercised options. The period of performance for options is up to ten years from the date of entry into the 19C BARDA Contract and such options could be exercised at any time during the contract term.

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Revenues in connection with the 19C BARDA Contract are recognized either over time or at a point in time. Performance obligations related to product delivery generate revenue at a point in time. Revenue from other performance obligations under the 19C BARDA Contract are recognized over time using an input method using costs incurred to date relative to total estimated costs at completion. For the years ended December 31, 2024 and 2023, the Company recognized revenues of $5.4 million and $3.0 million, respectively, on an over time basis. In contrast, revenue recognized for product delivery and therefore at a point in time for the years ended December 31, 2024 and 2023, was $100.1 million and $97.9 million, respectively.

U.S. Department of Defense Procurement Contracts

In 2024, the Company had sales of approximately $10 million with the U.S. Department of Defense ("DoD"). Sales consist mostly of delivery of oral TPOXX®, with a minor amount of IV TPOXX® delivered.

In 2023, the Company had sales of approximately $11 million with the DoD. Sales consist of delivery of oral TPOXX®.

Over the past three years, the Company has received three procurement contracts from the DoD, including a $9 million contract in August 2024, which has been fulfilled.

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International Sales Activity

In the year ended December 31, 2024, the Company had international sales of $23.0 million consisting of deliveries of oral TPOXX® to 13 countries. For international sales in the first and second quarters, Meridian was the counterparty to contracts under which the sales were made (see discussion and definition below regarding International Promotion Agreement). For international sales in the third and fourth quarters, the Company was the counterparty to the contracts under which the sales were made.

In the year ended December 31, 2023, the Company delivered, and received acceptance for, approximately $21.3 million of oral TPOXX® to five European countries, one Middle Eastern country, and one Asia Pacific country. Meridian was the counterparty to international contracts under which these sales were made (see discussion and definition below regarding International Promotion Agreement).

Revenue in connection with international procurement contracts for the delivery of product are recognized at a point in time on a gross basis, as the Company acts as the principal in the transaction. During the year ended December 31, 2024, the Company recognized $23.0 million of sales in connection with international contracts. During the year ended December 31, 2023, the Company recognized $21.3 million of sales in connection with international contracts.

International Promotion Agreement

Research Agreements and Grants

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4.Inventory

Inventory consisted of the following:

As of

5.Property, Plant and Equipment

Property, plant and equipment consisted of the following:

As of

Depreciation and amortization expense on property, plant, and equipment was $0.5 million for each of the years ended December 31, 2024, 2023, and 2022.

6.Accrued Expenses

Accrued expenses and other current liabilities consisted of the following:

As of

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7.Per Share Data

The Company computes, presents and discloses earnings per share in accordance with the authoritative guidance which specifies the computation, presentation and disclosure requirements for earnings per share of entities with publicly held common stock or potential common stock. The objective of basic EPS is to measure the performance of an entity over the reporting period by dividing income (loss) by the weighted average shares outstanding. The objective of diluted EPS is consistent with that of basic EPS, except that it also gives effect to all potentially dilutive common shares outstanding during the period.

The following is a reconciliation of the basic and diluted earnings (loss) per share computation:

Year Ended December 31,

Less: Change in fair value of warrants — — 400,663

Earnings per share: basic $ 0.83 $ 0.95 $ 0.46

Earnings per share: diluted $ 0.82 $ 0.95 $ 0.46

For the years ended December 31, 2024, December 31, 2023 and December 31, 2022, weighted-average diluted shares include the dilutive effect of in-the-money options and stock-settled RSUs. For the year ended December 31, 2022, the diluted earnings per share calculation also reflects the effect of the exercise or assumed exercise of outstanding warrants and any corresponding elimination of the impact included in operating results from the change in fair value of the warrants. The dilutive effect of warrants, stock-settled RSUs and options is calculated based on the average share price for each fiscal period using the treasury stock method. Under the treasury stock method, the amount the employee must pay for exercising stock options, the average amount of compensation cost for future service that the Company has not yet recognized, and the amount of tax benefits that would be recorded in additional paid-in capital when the award becomes deductible, are collectively assumed to be used to repurchase shares. Cash-settled RSUs were presumed to be cash-settled and therefore excluded from the diluted earnings per share calculations for the years ended December 31, 2024, 2023 and 2022 because the net effect of their inclusion, including the elimination of the impact in the operating results of the change in fair value of these RSUs, would have been anti-dilutive. For the years ended December 31, 2024, 2023 and 2022, the weighted average number of shares under the cash-settled RSUs excluded from the calculation of diluted earnings per share was 48,642, 32,660, and 17,388, respectively.

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8.Stockholders’ Equity

On December 31, 2024, the Company’s authorized share capital consisted of 620,000,000 shares, of which 600,000,000 are designated common shares and 20,000,000 are designated preferred shares. The Company’s Board of Directors is authorized to issue preferred shares in series with rights, privileges and qualifications of each series determined by the Board. As of December 31, 2024 and 2023, no preferred shares were outstanding or issued.

On August 2, 2021, the Company's Board of Directors authorized a share repurchase program ("Repurchase Authorization") under which the Company could repurchase up to $50 million of the Company's common stock through December 31, 2023. The Company started repurchasing shares under this program in the fourth quarter of 2021. Repurchases under the Repurchase Authorization were made from time to time at the Company's discretion. The timing and actual number of shares repurchased depended on a variety of factors, including: timing of procurement orders under government contracts; alternative opportunities for strategic uses of cash; the stock price of the Company’s common stock; market conditions; alternative capital management uses of cash; and other corporate liquidity requirements and priorities. On December 31, 2023, the Repurchase Authorization expired. As a result, during the year ended December 31, 2024, the Company did not repurchase any shares. During the year ended December 31, 2023, the Company repurchased approximately 1.7 million shares of common stock under the Repurchase Authorization for approximately $11.0 million. In addition, during the year ended December 31, 2023, the Company recorded approximately $0.1 million of excise tax associated with the repurchase of common stock.

On March 12,2024, the Board of Directors declared a special dividend of $0.60 per share on the common stock of the Company, which resulted in an overall dividend payment of approximately $43 million. The special dividend was paid on April 11,2024 to shareholders of record at the close of business on March 26,2024.

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9.Stock Compensation Plans

The Company’s 2010 Stock Incentive Plan (the “2010 Plan”) was initially adopted in May 2010. The 2010 Plan provided for the issuance of stock options, restricted stock and unrestricted stock with respect to an aggregate of 2,000,000 shares of the Company’s common stock to employees, consultants and outside directors of the Company. On May 17, 2011, the 2010 Plan was amended to provide for the issuance of RSUs and on February 2, 2012, the 2010 Plan was amended to provide for the issuance of stock-settled stock appreciation rights ("SSARs"). Effective April 25, 2012 and May 23, 2017, the 2010 Plan was amended to increase the maximum number of shares of common stock available for issuance to an aggregate of 4,500,000 shares and 8,500,000 shares, respectively. The vesting period for awards granted under the 2010 Plan is determined by the Compensation Committee of the Board of Directors. The Compensation Committee also determines the expiration date of each equity award; however, stock options may not be exercisable more than ten years after the date of grant as the maximum term of equity awards issued under the 2010 Plan is ten years.

For the years ended December 31, 2024, 2023 and 2022, the Company recorded stock-based compensation expense, including stock options and RSUs, of approximately $3.6 million, $2.1 million and $1.8 million, respectively.

Stock Options

Stock option awards provide holders the right to purchase shares of Common Stock at prices determined by the Compensation Committee, at the time of grant, and must have an exercise price equal to or in excess of the fair market value of the Company’s common stock at the date of grant.

The fair value of options granted is estimated at the date of grant. Expected volatility has been estimated using the historical volatility of the Company's common stock using historical periods equivalent to the options’ expected lives. The expected dividend yield assumption reflects that the Company does not have a recurring dividend program. The risk-free interest rate assumption is based upon observed interest rates for securities with maturities approximating the options’ expected lives. The expected life was estimated based on historical experience and expectation of employee exercise behavior in the future giving consideration to the contractual terms of the award.

The fair value of stock options issued under our stock plan have been estimated with the following assumptions:

Weighted Average Expected Life (in Years) 10

Risk-free Interest Rate 4.1% - 4.2%

Dividend Yield 0%

A summary of the Company’s stock option activity is as follows:

Weighted Weighted

Average Average Aggregate

Number of Exercise Remaining Life Intrinsic

Options Price (in years) Value

Exercised — —

(1) Balances as of January 1, 2024 differ from those as of December 31, 2023 presented in the Company's 2023 Form 10-K due to the special dividend paid during 2024. In connection with the dividend, the number of options and the weighted average exercise price were adjusted pursuant to the terms of the Company's 2010 Plan.

As of December 31, 2024, the remaining unrecognized stock-based compensation cost related to stock options expected to be recognized is $1.4 million. The total fair value of stock options which vested during the years ended December 31, 2024 and 2023 was approximately $24,964 and $123,000, respectively.

There were no stock options exercised during the years ended December 31, 2024 and December 31, 2022. The stock options exercised during the year ended December 31, 2023 had an intrinsic value of less than $0.1 million. The intrinsic value represents the amount by which the market price of the underlying stock exceeds the exercise price of an option.

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Restricted Stock Units

RSUs (including PSUs) awarded to employees vest on schedules of between one year and three years, and RSUs awarded to directors of the Company vest over a one-year period. A summary of the Company’s RSU activity is as follows:

Weighted

Average

Number of Grant-Date

RSUs Fair Value

(1) includes 59,312 awards which were settled in cash.

(2) includes 40,075 awards which were expected to be settled in cash.

As of December 31, 2024, $1.7 million of total remaining unrecognized stock-based compensation cost related to RSUs is expected to be recognized over the weighted-average remaining requisite service period of 1.4 years. The weighted average fair value at the date of grant for restricted stock awards granted during the years ended December 31, 2024, 2023 and 2022 was $5.51, $6.14 and $9.40 per share, respectively. Based on the grant date, the total fair value of restricted stock and restricted stock units vested and released during the years ended December 31, 2024, 2023 and 2022 was approximately $2.6 million, $1.9 million and $1.2 million, respectively.

10.Income Taxes

The Company's provision (benefit) for income taxes comprises the following:

For the year ended December 31,

Current:

Deferred:

Foreign — — —

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The Company’s deferred tax assets and liabilities comprise the following:

As of December 31,

Deferred income tax assets:

Amortization of intangible assets — 7,852

Deferred income tax liabilities:

Property, plant and equipment — —

The recognition of a valuation allowance for deferred taxes requires management to make estimates and judgments about the Company’s future profitability which is inherently uncertain. The Company assesses all available positive and negative evidence to determine if its existing deferred tax assets are realizable on a more-likely-than-not basis. In making such assessment, the Company considered the reversal of existing taxable temporary differences, projected future taxable income, tax planning strategies and recent financial operating results. The ultimate realization of a deferred tax asset is ultimately dependent on the Company's generation of sufficient taxable income within the available net operating loss carryback and/or carryforward periods to utilize the deductible temporary differences. As of December 31, 2024, the Company maintains a full valuation on its state and local net operating losses which the Company determined were not realizable on a more-likely-than-not basis. The Company's valuation allowance decreased by approximately $22,000 during the year ended December 31, 2024.

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The benefit for income taxes differs from the expected amount calculated by applying the Company's statutory rate to the income or loss before benefit for income taxes as follows:

As of December 31,

Statutory federal income tax rate 21.0 % 21.0 % 21.0 %

State and local taxes 0.2 % 0.1 % 1.6 %

Change in fair value of common stock warrant — — (0.2 )%

For the years ended December 31, 2024, 2023 and 2022, the Company’s effective tax rate differs from the statutory rate of 21% primarily as a result of certain permanent differences including non-deductible executive compensation under IRC Section 162(m), stock-based compensation related items, state and local taxes, and other items.

A reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding interest and penalties, is as follows:

For the year ended December 31,

Tax positions related to the current and prior years:

Settlements — — —

Included in the balance of unrecognized tax benefits as of December 31, 2024, are potential benefits of $4.7 million that, if recognized, would affect the effective tax rate. The total amount accrued for interest and penalties as of December 31, 2024 and December 31, 2023, was $315,000 and $214,000, respectively. For the years ended December 31, 2024 and December 31, 2023, the Company recorded an income tax expense of $101,000 and $142,000, respectively, related to the accrual of interest and penalties. There are no uncertain tax positions for which it is reasonably possible that the total amounts of unrecognized benefits will significantly increase or decrease within twelve months from December 31, 2024.

The Company files federal income tax returns and income tax returns in various state and local tax jurisdictions. The federal tax years open to examination are 2021 to 2024. The Company's state and local tax years that are open to tax examination are generally 2020 to 2024.

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11. Segment and Geographic Information

The Company operates in one single operating and reportable segment, which includes all activities related to the sale of the Company’s Oral and IV TPOXX® as well as research and development services. The Company derives revenue primarily from sales to the U.S. Government as well as international governments (including government affiliated entities) and manages the business activities on a consolidated basis. The segment derives revenues from customers through the delivery of product and fulfillment of research and development services.

The CODM assesses performance for the segment and decides how to allocate resources based on net income that also is reported on the income statement as consolidated net income. Consolidated net income is also a measure that is considered in monitoring budget versus actual results.

The CODM does not review assets in evaluating the results of the segment, and therefore, such information is not presented.

The following table provides the operating result of the Company's segment:

For the years ended December 31,

Revenue

Less:

(1) Other segment items include insurance, regulatory and consultant expenses, as well as various general corporate costs.

Revenues by geographic region were as follows:

For the year ended December 31,

International

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12.Commitments and Contingencies

Operating lease commitments

The Company leases its Corvallis, Oregon, office space under an operating lease which was signed on November 3, 2017 and commenced on January 1, 2018. The initial term of this lease was to expire on December 31, 2019, after which the Company had two successive renewal options; one for two years and the other for three years. In the second quarter of 2019, the Company exercised the first renewal option, which extended the lease expiration date to December 31, 2021. In the second quarter of 2021, the Company exercised the second renewal option, which extended the lease expiration date to December 31, 2024. In the second quarter of 2024, the Company entered into an additional addendum, which extended the lease expiration date to December 31, 2026. In connection with this additional addendum, the Company recorded an increase to operating lease right-of-use assets and operating lease liabilities of approximately $0.5 million in the second quarter of 2024. The Company had a lease for the same location prior to this lease. On May 26, 2017 the Company and MacAndrews & Forbes Incorporated ("M&F") entered into a ten-year office lease agreement (the “New HQ Lease”), pursuant to which the Company agreed to lease 3,200 square feet at 31 East 62nd Street, New York, New York. The Company is utilizing premises leased under the New HQ Lease as its corporate headquarters. The Company has no leases that qualify as finance leases.

Operating lease costs totaled $0.6 million for each of the years ended December 31, 2024 and 2023. Cash paid for amounts included in the measurement of lease liabilities from operating cash flows was $0.7 million for each the years ended December 31, 2024 and 2023, respectively. As of December 31, 2024, the weighted-average remaining lease term of the Company’s operating leases was 2.23 years while the weighted-average discount rate was 9.95%.

The following is a maturity analysis of the Company's lease liabilities as of December 31, 2024:

Total undiscounted cash flows under operating leases 1,478,546

Less: Imputed interest (115,477 )

Present value of lease liabilities $ 1,363,069

As of December 31, 2024, approximately $0.8 million of the lease liability is included in Other liabilities on the consolidated balance sheet with the current portion included in accrued expenses.

Legal Proceedings

From time to time, we may be involved in a variety of claims, suits, investigations and proceedings arising from the ordinary course of our business, collections claims, breach of contract claims, labor and employment claims, tax and other matters. Although such claims, suits, investigations and proceedings are inherently uncertain and their results cannot be predicted with certainty, we believe that the resolution of such current pending matters, if any, will not have a material adverse effect on our business, consolidated financial position, results of operations or cash flow. Regardless of the outcome, litigation can have an adverse impact on us because of legal costs, diversion of management resources and other factors.

Purchase Commitments

In the course of our business, the Company regularly enters into agreements with third party organizations to provide contract manufacturing services and research and development services. Under these agreements, the Company issues purchase orders which obligate the Company to pay a specified price when agreed-upon services are performed. Commitments under the purchase orders do not exceed our planned commercial and research and development needs. As of December 31, 2024, the Company has approximately $2.4 million of purchase commitments associated with manufacturing obligations.

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13.Related Party Transactions

Board of Directors

Effective June 13, 2023, an individual was elected to the Company's Board of Directors who was already providing and continued to provide consulting services to the Company. Under a consulting agreement, the director received a monthly fee of $20,000 in 2023 and 2024. During the year ended December 31, 2024, the Company incurred $240,000 under this agreement. The Company had no outstanding payables or accrued expenses related to the services performed by this vendor as of December 31, 2024. Effective September 26, 2024, the consulting agreement was amended; the amendment specifies that the director would receive a payment of between $120,000 and $240,000 in the event that the Company receives a request for proposal ("RFP") or request for information ("RFI") from the Administration of Strategic Preparedness and Response within the U.S. Government before July 1, 2025. Because the Company did not receive an RFI or an RFP before January 1, 2025, the maximum payment now available is $180,000. In addition, pursuant to the amendment the director is entitled to receive the monthly fee through March 31, 2026, unless the director resigns as a consultant, or the Company terminates the director for cause. On March 6, 2025, the director resigned from the Company’s Board of Directors, See Item 9B (Other Information).

Real Estate Leases

On May 26, 2017, the Company and M&F Incorporated entered into the New HQ Lease, pursuant to which the Company agreed to lease 3,200 square feet at 31 East 62nd Street, New York, New York. The Company is utilizing premises leased under the New HQ Lease as its corporate headquarters. The Company's rental obligations consisted of a fixed rent of $25,333 per month in the firstsixty-three months of the term, subject to a rent abatement for the firstsix months of the term. From the first day of the sixty-fourth month of the term through the expiration or earlier termination of the lease, the Company's rental obligations consist of a fixed rent of $29,333 per month. In addition to the fixed rent, the Company will pay a facility fee in consideration of the landlord making available certain ancillary services, commencing on the first anniversary of entry into the lease. The facility fee was $3,333 per month for the second year of the term and increases by five percent each year thereafter, to $4,925 per month in the final year of the term. During the year ended December 31, 2024, the Company paid $0.4 million for rent and ancillary services associated with this lease. The Company had no outstanding payables or accrued expenses related to this lease as of December 31, 2024 and 2023.

Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of December 31, 2024 in accordance with the framework on Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission ("COSO"). The term “disclosure controls and procedures” is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. Management recognizes that any disclosure controls and procedures no matter how well designed and operated, can only provide reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of December 31, 2024 at a reasonable level of assurance.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting during the quarter ended December 31, 2024 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Report on Internal Control over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rule 13a-15(f) or Rule 15d-15(f) of the Exchange Act. Internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Our internal control over financial reporting includes those policies and procedures that:

Our management conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2024 using the framework in Internal Control-Integrated Framework (2013) issued by the COSO. Based on this evaluation using the COSO criteria, management concluded that the Company’s internal control over financial reporting was effective as of December 31, 2024.

Attestation Report of the Independent Registered Public Accounting Firm

The effectiveness of our internal control over financial reporting as of December 31, 2024 has been audited by PricewaterhouseCoopers LLP, our independent registered public accounting firm, as stated in their attestation report, which is included in Item 8, “Financial Statements and Supplementary Data,” of this Annual Report on Form 10-K.

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Item 9B. Other Information

On March 6, 2025, SIGA Technologies, Inc. (the “Company”) was informed of the voluntary resignation by Evan Knisely from the Company’s board of directors (the “Board”) effective immediately. Mr. Knisely, who has served on the Board since June 2023, resigned to devote more time to his private business endeavors including continuing and expanding his consulting role with SIGA, a function in which he has served since October of 2020. His resignation is not related to any disagreement with the Company on any matter relating to the registrant’s operations, policies or practices.

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

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PART III

With the exception of the information incorporated by reference from our Proxy Statement for our 2025 Annual Meeting of Stockholders ("2025 Proxy Statement") in Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K, our 2025 Proxy Statement is not to be deemed filed as a part of this Form 10-K.

Item 10.Directors, Executive Officers, and Corporate Governance

The information required by Item 10 will be included in the Proxy Statement for our 2025 Annual Meeting of Stockholders ("2025 Proxy Statement") under the headings “Proposal 1: Election of Directors,” “Board of Directors,” “Executive Officers,” “Code of Ethics,” “Insider Trading Policy” and, if applicable, “Delinquent Section 16(a) Reports,” or in an amendment to this Annual Report on Form 10-K and is incorporated herein by reference.

Item 11.Executive Compensation

The information required by Item 11 will be included in the 2025 Proxy Statement under the headings “Compensation Discussion and Analysis,” “Director Compensation,” “Compensation Committee Interlocks and Insider Participation” and “Compensation Committee Report” or in an amendment to this Annual Report on Form 10-K and is incorporated herein by reference. Information contained in the 2025 Proxy Statement or an amendment to this Annual Report on Form 10-K under the caption “Compensation Committee Report” is furnished and not deemed filed with the SEC.

Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by this Item 12 concerning security ownership of certain beneficial owners and management is incorporated by reference to the section titled "Security Ownership of Certain Beneficial Owners and Management" in our 2025 Proxy Statement.

Equity Compensation Plan Information

The following table sets forth certain compensation plan information with respect to compensation plans as of December 31, 2024:

Equity compensation plans not approved by security holders — — —

(2) Consists of the 2010 Stock Incentive Plan.

Item 13.Certain Relationships and Related Transactions, and Director Independence

The information required by this Item 13 will be included in the 2025 Proxy Statement under the headings "Transactions with Related Persons" and "Board of Directors – Director Independence" or in an amendment to this Annual Report on Form 10-K and is incorporated herein by reference.

Item 14.Principal Accountant Fees and Services

The information required by this Item 14 is incorporated by reference to the section titled "Fees Billed by PricewaterhouseCoopers, LLP" in our 2025 Proxy Statement.

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PART IV

Item 15.Exhibits and Financial Statement Schedules

(a) (1) and (2). Financial Statements.

See Index to Financial Statements under Item 8 in Part II hereof where these documents are listed. All schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange Commission are not required under the related instructions or are inapplicable and, therefore, have been omitted.

(a) (3). Exhibits.

The following is a list of exhibits:

Exhibit No. Description

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19.1 SIGA Technologies, Inc. Insider Trading Policy

101.SCH Inline Taxonomy Extension Schema Document

101.CAL Inline Taxonomy Extension Calculation Linkbase Document

101.DEF Inline Taxonomy Extension Definition Linkbase Document

101.LAB Inline Taxonomy Extension Labels Linkbase Document

101.PRE Inline Taxonomy Extension Presentation Linkbase Document

* management contract, compensatory plan or arrangement.

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Item 16. Form 10-K Summary

None.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

SIGA TECHNOLOGIES, INC.

(Registrant)

Date: March 11, 2025 By: /s/ Diem Nguyen, Ph.D.

Diem Nguyen, Ph.D.

Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature Title of Capacities Date

/s/ Diem Nguyen, Ph.D. March 11, 2025

Diem Nguyen, Ph.D. Chief Executive Officer and Director

(Principal Executive Officer)

/s/ Daniel J. Luckshire

Daniel J. Luckshire Executive Vice President and March 11, 2025

Chief Financial Officer

(Principal Financial Officer and

Principal Accounting Officer)

/s/ Jaymie Durnan

Jaymie Durnan Director March 11, 2025

/s/ Harold E. Ford, Jr.

Harold E. Ford, Jr. Director March 11, 2025

/s/ Joseph Marshall

Joseph Marshall Director March 11, 2025

/s/ Gary J. Nabel

Gary J. Nabel Director March 11, 2025

/s/ Julian Nemirovsky

Julian Nemirovsky Director March 11, 2025

/s/ Holly L. Phillips

Holly L. Phillips Director March 11, 2025

SIGA US Equity

SIGA · 10-K · period ended 2024-12-31

Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Item 8. Financial Statements and Supplementary Data

Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Item 9A. Controls and Procedures

Item 9B. Other Information

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Item 10.Directors, Executive Officers, and Corporate Governance

Item 11.Executive Compensation

Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Item 13.Certain Relationships and Related Transactions, and Director Independence

Item 14.Principal Accountant Fees and Services

Item 15.Exhibits and Financial Statement Schedules

Item 16. Form 10-K Summary

SIGA US Equity☆

SIGA · 10-K · period ended 2024-12-31

Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Item 8. Financial Statements and Supplementary Data

Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Item 9A. Controls and Procedures

Item 9B. Other Information

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Item 10.Directors, Executive Officers, and Corporate Governance

Item 11.Executive Compensation

Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Item 13.Certain Relationships and Related Transactions, and Director Independence

Item 14.Principal Accountant Fees and Services

Item 15.Exhibits and Financial Statement Schedules

Item 16. Form 10-K Summary

SIGA US Equity