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SIGA Technologies, Inc.

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FY2023 Annual Report · SIGA Technologies, Inc.
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(Mark One)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-K

☒

☐

Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
For the fiscal year ended December 31, 2023
Or
Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
For the transition period from ________ to ___________

Commission File No. 0-23047

SIGA Technologies, Inc.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)

31 East 62nd Street
New York, NY
(Address of principal executive offices)

13-3864870
(IRS Employer Identification. No.)

10065
(zip code)

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

Registrant’s telephone number, including area code: (212) 672-9100

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

common stock, $.0001 par value

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

SIGA

None

The Nasdaq Global Market

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

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

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

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

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

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

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

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

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

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

The aggregate market value of the voting and non-voting common stock held by non-affiliates of the registrant, based upon the closing sale price of the
common stock on June 30, 2023 as reported on The Nasdaq Global Market was approximately $230,952,256.

As of February 15, 2024, the registrant had outstanding 71,091,616 shares of common stock.

DOCUMENTS INCORPORATED BY REFERENCE

The following document is incorporated herein by reference:

Document
Proxy Statement for the Company’s 2024 Annual
Meeting of Stockholders

Parts Into Which Incorporated
Part III

 
 
 
 
 
 
 
 
 
 
 
Table of Contents

PART I
Item 1.
Item 1A.
Item 1B.
Item 1C.
Item 2.
Item 3.
Item 4.

PART II
Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.
Item 9C.

PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV
Item 15.
Item 16.

SIGNATURES

SIGA TECHNOLOGIES, INC.
FORM 10-K

Table of Contents

Business
Risk Factors
Unresolved Staff Comments
Cybersecurity
Properties
Legal Proceedings
Mine Safety Disclosures

Market For Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
[Reserved]
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information
Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Directors, Executive Officers and Corporate Governance
Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Certain Relationships and Related Transactions, and Director Independence
Principal Accounting Fees and Services

Exhibits, Financial Statement Schedules
Form 10-K Summary

Page No.

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Forward-Looking Statements

Part I

Certain statements in this Annual Report on Form 10-K, including certain statements contained in “Business” and “Management’s Discussion and
Analysis of Financial Condition and Results of Operations,” constitute “forward-looking statements” within the meaning of Section 27A of the Securities
Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), including
statements relating to the progress of SIGA’s development programs and timelines for bringing products to market, delivering products to domestic and
international  customers,  the  enforceability  of  our  procurement  contracts,  such  as  the  19C  BARDA  Contract  (the  "BARDA  Contract"),  with  the  U.S.
Biomedical Advanced Research and Development Authority ("BARDA"), and responding to the global outbreak of monkeypox ("mpox"). The words or
phrases  “can  be,”  “expects,”  “may  affect,”  “may  depend,”  “believes,”  “estimate,”  “targeting,”  “project”  and  similar  words  and  phrases  are  intended  to
identify such forward-looking statements. Such forward-looking statements are subject to various known and unknown risks and uncertainties, and SIGA
cautions you that any forward-looking information provided by or on behalf of SIGA is not a guarantee of future performance. SIGA’s actual results could
differ  materially  from  those  anticipated  by  such  forward-looking  statements  due  to  a  number  of  factors,  some  of  which  are  beyond  SIGA’s  control,
including, but not limited to, (i) the risk that BARDA elects, in its sole discretion as permitted under the BARDA Contract, not to exercise all, or any, of the
remaining unexercised options under those contracts, (ii) the risk that SIGA may not complete performance under the BARDA Contract on schedule or in
accordance  with  contractual  terms,  (iii)  the  risk  that  the  BARDA  Contract,  DoD  Contract  #2  (defined  below)  or  PEP  Label  Expansion  R&D  Contract
(defined  below)  are  modified  or  canceled  at  the  request  or  requirement  of  the  U.S.  Government,  (iv)  the  risk  that  the  nascent  international  biodefense
market does not develop to a degree that allows SIGA to continue to successfully market TPOXX® internationally, (v) the risk that potential products,
including potential alternative uses or formulations of TPOXX® that appear promising to SIGA or its collaborators, cannot be shown to be efficacious or
safe  in  subsequent  pre-clinical  or  clinical  trials,  (vi)  the  risk  that  target  timing  for  deliveries  of  product  to  customers,  and  the  recognition  of  related
revenues, are delayed or adversely impacted by the actions, or inaction, of contract manufacturing organizations, or other vendors, within the supply chain,
or due to coordination activities between the customer and supply chain vendors, (vii) the risk that SIGA or its collaborators will not obtain appropriate or
necessary  governmental  approvals  to  market  these  or  other  potential  products  or  uses,  (viii)  the  risk  that  SIGA  may  not  be  able  to  secure  or  enforce
sufficient legal rights in its products, including intellectual property protection, (ix) the risk that any challenge to SIGA’s patent and other property rights, if
adversely determined, could affect SIGA’s business and, even if determined favorably, could be costly, (x) the risk that regulatory requirements applicable
to SIGA’s products may result in the need for further or additional testing or documentation that will delay or prevent SIGA from seeking or obtaining
needed approvals to market these products, (xi) the risk that the volatile and competitive nature of the biotechnology industry may hamper SIGA’s efforts to
develop or market its products, (xii) the risk that changes in domestic or foreign economic and market conditions may affect SIGA’s ability to advance its
research  or  may  affect  its  products  adversely,  (xiii)  the  effect  of  federal,  state,  and  foreign  regulation,  including  drug  regulation  and  international  trade
regulation, on SIGA’s businesses, (xiv) the risk of disruptions to SIGA’s supply chain for the manufacture of TPOXX®, causing delays in SIGA’s research
and development activities, causing delays or the re-allocation of funding in connection with SIGA’s government contracts, or diverting the attention of
government staff overseeing SIGA’s government contracts, (xv) risks associated with actions or uncertainties surrounding the debt ceiling, (xvi) the risk
that the U.S. or foreign governments' responses (including inaction) to national or global economic conditions or infectious diseases, such as COVID-19,
are ineffective and may adversely affect SIGA’s business, and (xvii) risks associated with responding to the current mpox outbreak, as well as the risks and
uncertainties included in Item 1A “Risk Factors” of this Form 10-K. All such forward-looking statements are current only as of the date on which such
statements were made. SIGA does not undertake any obligation to update publicly any forward-looking statement to reflect events or circumstances after
the date on which any such statement is made or to reflect the occurrence of unanticipated events. The information contained on any website referenced in
this Form 10-K is not incorporated by reference into this filing.

Item 1. Business

Overview

SIGA Technologies, Inc. is referred to throughout this report as “SIGA,” “the Company,” “we” or “us.”

We  are  a  commercial-stage  pharmaceutical  company.  The  Company  sells  its  lead  product,  TPOXX®  (“oral  TPOXX®,”  also  known  as
"tecovirimat"  in  certain  international  markets),  to  the  U.S.  Government  and  international  governments  (including  government  affiliated  entities).
Additionally, the Company sells the intravenous formulation of TPOXX® ("IV TPOXX®") to the U.S. Government.

TPOXX® is an oral formulation 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.

In connection with IV TPOXX®, SIGA announced on May 19, 2022 that the FDA approved this formulation for the treatment of smallpox. 

In addition to being approved by the FDA, oral TPOXX® (tecovirimat) has regulatory approval with the European Medicines Agency ("EMA"),
Health Canada and the Medicines and Healthcare Products Regulatory Agency ("MHRA") of the United Kingdom. The EMA and MHRA approved label
indication  covers  the  treatment  of  smallpox,  monkeypox  ("mpox"),  cowpox,  and  vaccinia  complications  following  vaccination  against  smallpox.  The
Health Canada approved label indication covers the treatment of smallpox.

With  respect  to  the  regulatory  approvals  by  the  EMA,  MHRA  and  Health  Canada,  oral  tecovirimat  represents  the  same  formulation  that  was

approved by the FDA in July 2018 under the brand name TPOXX®.

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In connection with a potential FDA label expansion of oral TPOXX® for an indication covering smallpox post-exposure prophylaxis (“PEP”), the
Company completed an immunogenicity trial and an expanded safety trial in early 2023. The nature and timing of a 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  the  trials;  the
Company is currently targeting a Supplemental NDA filing in 2024.

In connection with the 2022 global response to an 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. As of December 31, 2023, there were five randomized, placebo-controlled
clinical trials enrolling patients, when available, in locations including the United States, United Kingdom, the Democratic Republic of Congo ("DRC"),
South America and Europe. These randomized clinical trials are enrolling patients to collect data on the potential benefits of using TPOXX® as an antiviral
treatment for active mpox disease. 

The Company may be able to use data from the trials noted above, as well as from other trials, to potentially pursue an FDA label expansion of
oral TPOXX® for an indication covering the treatment of mpox. The viability, and timing, of a potential FDA submission for an mpox indication will be
impacted by a series of factors, including the magnitude and severity of future mpox cases, the location of future cases, enrollment in clinical trials, and
results of randomized, placebo-controlled and observational clinical trials.

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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®, and procurement activities. As of December 31, 2023, 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 $407.1 million of payments are related to exercised options and up to approximately $143.7
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, 2023, 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, $4.3 million for the delivery of IV FDP to the Strategic Stockpile, and $22.1 million for other base period
activities. IV BDS has been used for the manufacture of courses of IV FDP. 

The  options  that  have  been  exercised  to  date  provide  for  payments  up  to  approximately  $407.1  million.  There  are  exercised  options  for  the
following activities: payments up to $337.7 million for the manufacture and delivery of up to 1.1 million courses of oral TPOXX®; payments up to $51.2
million for the manufacture of courses of IV FDP, of which $20.4 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,  2023,  the  Company  has  cumulatively  delivered  $323.0  million  of  oral
TPOXX® to the Strategic Stockpile, of which $97.9 million was delivered in the fourth quarter of 2023; has cumulatively received $20.5 million for the
completed  manufacture  of  IV  BDS;  and  has  been  cumulatively  reimbursed  $7.9  million  in  connection  with  post-marketing  activities  for  oral  and  IV
TPOXX®. In the first two months of 2024 ended February 29, 2024, approximately $15 million of oral TPOXX® was delivered to the Strategic Stockpile. 

Unexercised  options  specify  potential  payments  up  to  approximately  $143.7  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. There are options for the following activities:
payments of up to $112.5 million for the delivery of oral TPOXX® to the Strategic Stockpile; and 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.

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 to only 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. 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%.

Under the terms of this contract, exercise of procurement options is at the sole discretion of BARDA. The request for proposal that preceded the
award of the 19C BARDA Contract indicated that the expected purpose of the contract was to maintain the level of smallpox antiviral preparedness in the
Strategic  Stockpile.  Based  on  prior  product  delivery  activity,  and  current  FDA-approved  shelf  life  of  oral  TPOXX®,  the  Company  estimates  that  the
remaining options under the 19C BARDA Contract for 363,000 courses of oral TPOXX® (value of $112.5 million) and 32,000 courses of IV FDP (value
of $25.6 million) would need to be exercised in 2024 in order to approximately maintain historical stockpile levels of unexpired TPOXX® treatment in the
Strategic Stockpile.     

U.S. Department of Defense Procurement Contracts

On May 12, 2022, the Company announced a contract with the U.S. Department of Defense ("DoD") for the procurement of oral TPOXX® ("DoD
Contract #1").  The DoD Contract #1 included a firm commitment for the DoD to procure approximately $3.6 million of oral TPOXX®, and an option,
exercisable at the sole discretion of the DoD, for the procurement of an additional approximately $3.8 million of oral TPOXX®.  In the second quarter of
2022, the Company delivered oral TPOXX® to the DoD and recognized revenue of $3.6 million, fulfilling the firm commitment in DoD Contract #1. In the
third quarter of 2022, the DoD exercised the option for $3.8 million of oral TPOXX® and the Company satisfied its obligation by delivering product in
September 2022 and recognized the related revenue. 

On September 28, 2022, the Company and the DoD signed a new procurement contract ("DoD Contract #2"). The DoD Contract #2 included a
firm commitment for the DoD to procure approximately $5.1 million of oral TPOXX®, and an option, exercisable at the sole discretion of the DoD for the
procurement of an additional approximately $5.5 million of oral TPOXX®. 

 
 
 
 
 
 
 
 
 
 
 
 
In  March  2023,  the  Company  fulfilled  the  firm  commitment  by  delivering  $5.1  million  of  oral  TPOXX®  to  the  DoD,  and  recognized  the
related revenue.  Additionally, in March 2023 the DoD exercised the $5.5 million option in DoD Contract #2 for the procurement of oral TPOXX® and the
Company delivered these courses to the DoD in the fourth quarter of 2023.

In February 2024, DoD Contract #2 was amended and approximately $1 million of oral TPOXX® was ordered by the DoD.

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International Procurement Contracts

In 2023, the Company has 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. In the first two months of 2024 ending February 29, 2024, the Company delivered an additional
approximately  $7  million  of  oral  TPOXX®  to  six  countries  in  Europe,  completing  greater  than  95%  of  deliveries  under  the  $18  million  of  firm
commitment  orders  from  13  countries  under  the  European  Commission’s  DG  HERA  (Health  Emergency  Preparedness  and  Response  Authority)  joint
procurement  mechanism,  which  was  announced  by  the  Company  in  October  2022.  Additionally,  $0.7  million  of  oral  TPOXX®  was  delivered  to  the
Canada  Department  of  National  Defence  ("CDND")  in  February  2024.  These  deliveries  were  made  in  connection  with  orders  and  contracts  under  the
International Promotion Agreement (defined and discussed below). Through the International Promotion Agreement, Meridian Medical Technologies, Inc.
("Meridian") is the counterparty to international contracts under which orders are placed for the purchase of oral TPOXX®. 

In addition to the above-mentioned orders and deliveries, the Company has a contract with the CDND under which the CDND has an option until
December 31, 2025, exercisable at its sole discretion, for the purchase of up to an additional $6.7 million of oral TPOXX®. As an international contract,
this contract is also administered under the International Promotion Agreement. The contract with the CDND (the "Canadian Military Contract"), issued in
April of 2020 and subsequently amended, is option-based and initially specified that the CDND would purchase up to $14 million of oral TPOXX® if all
options were exercised. 

International Promotion Agreement

Under the terms of the International Promotion Agreement, as amended, which has an initial term that expires on May 31, 2024, Meridian was
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 has agreed not to commercialize any competing product,
as  defined  in  the  International  Promotion  Agreement,  in  the  specified  field  of  use  in  the  Territory.  SIGA  retains  ownership,  intellectual  property,
distribution  and  supply  rights  and  regulatory  responsibilities  in  connection  with  TPOXX®,  and,  in  the  United  States  market,  also  retains  sales  and
marketing rights with respect to oral TPOXX®. SIGA’s consent is required for the entry into any sales arrangement pursuant to the International Promotion
Agreement.

Sales to international customers pursuant to the International Promotion Agreement are invoiced and collected by Meridian, and such collections
are remitted, less Meridian's fees, to the Company under a quarterly process specified in the International Promotion Agreement. The fee Meridian retains
pursuant to the International Promotion Agreement is 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  are  less  than  or  equal  to  a  specified  threshold,  and  a  higher  specified
percentage  of  such  collected  net  proceeds  for  calendar  years  in  which  such  net  collected  amounts  exceed  the  specified  threshold.  Taking  into  account
Meridian’s fee and manufacturing costs of oral TPOXX®, it is currently estimated by the Company that international sales of oral TPOXX® each year will
have a contribution margin (as expressed as a percentage of product sales, and before any consideration of expenses not directly related to manufacturing or
Meridian  activities)  of  between  approximately  65%  and  80%,  depending  on  the  international  sales  levels  each  year.  For  purposes  of  this  disclosure,
contribution margin (in amount) represents international product sales less applicable cost of sales and the Meridian fee (which is included within selling,
general and administrative expenses within the income statement).

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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. 

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.

Manufacturing

SIGA does not have a manufacturing infrastructure and does not intend to develop one for the manufacture of TPOXX®. SIGA relies on and uses
third parties known as Contract Manufacturing Organizations (“CMOs”) to procure commercial raw materials and supplies, and to manufacture TPOXX®.
SIGA's  CMOs  apply  methods  and  controls  in  facilities  that  are  used  for  manufacturing,  processing,  packaging,  testing,  analyzing  and  holding
pharmaceuticals  which  conform  to  current  good  manufacturing  practices  (“cGMP”),  the  standard  set  by  the  FDA  for  manufacture  and  storage  of
pharmaceuticals intended for human use.

Oral TPOXX®:

For the manufacture of oral TPOXX®, the Company uses the following CMOs: W.R. Grace and Company (“Grace”), who acquired the assets of
Albemarle's  Fine  Chemistry  Services  Business  in  2021;  Microsize,  formerly  known  as  Powdersize,  LLC  and  renamed  following  a  change  of  control
transaction; Catalent Pharma Solutions LLC (“Catalent”); and Packaging Coordinators, LLC ("PCI"). 

SIGA has had manufacturing agreements with Grace and a predecessor owner (Albemarle) since 2011.  Pursuant to the current agreement with
Grace,  which  was  put  in  place  in  2018  when  Albemarle  was  the  owner  of  the  operations  that  provide  services  to  SIGA,  Grace  manufactures,  tests  and
supplies active pharmaceutical ingredient (“API”) for use in TPOXX®. The agreement provides that, during the term of the current agreement, SIGA was
required to purchase 100% of its internal and external API requirements for TPOXX® from Grace until the later of (i) September 30, 2021 and (ii) such
time as SIGA has purchased 12 metric tons of API from Grace under the agreement. As of December 31, 2023, SIGA has purchased more than 12 metric
tons of API; as such, SIGA will purchase at least 70% of its internal and external API requirements for TPOXX® from Grace until the end of the term of
the agreement (as described below), unless the Company receives an offer to purchase API at a price that Grace is unable to match, in which event SIGA
will purchase at least 30% of its internal and external API requirements for TPOXX® from Grace until the Company has fulfilled its delivery obligations
under the 19C BARDA Contract. There is no minimum amount of kilograms of API that must be used or acquired by SIGA. The following events are
excluded from the “100% API” requirement: (i) if a contract entered into by SIGA for the sale of final drug product (“FDP”) requires that the product used
as the API for such FDP be manufactured outside the U.S. and Grace is unwilling or unable to subcontract such manufacture to a party or parties that meet
the terms of the agreement; (ii) if a contract entered into by SIGA for the sale of FDP in an intravenous formulation requires different specifications than
those provided for under the agreement and the parties are not able to reach agreement on the necessary changes to the specifications or on pricing; or (iii)
if Grace fails to perform any of its obligations under the agreement and does not cure such failure within 30 days of written notice from SIGA. SIGA is
required to pay Grace within 45 days of its invoice date. Pricing for API is at a fixed price per kilogram, subject to adjustment for increases in raw material
costs and/or general manufacturing costs. Grace is required to deliver API that conforms to specifications outlined in the agreement; the Company is not
required to pay for API that does not meet specifications. The Company has 120 days to reject any shipments that do not meet such specifications or are
damaged. In addition to receiving payments for API deliveries, Grace is also paid for related services, such as stability testing. The Company’s agreement
with  Grace  was  scheduled  to  expire  upon  the  earlier  of:  (i)  September  30,  2023,  or  (ii)  the  fulfillment  of  delivery  obligations  under  the  19C  BARDA
Contract.  On  September  30,  2023,  the  contract  term  automatically  renewed  for  a  one-year  term.  Upon  September  30,  2024,  and  each  anniversary
thereafter, the agreement will renew for successive one-year renewal terms until either the Company or Grace provides notice of non-renewal at least 90
days prior to the expiration date of a term.

6

 
 
 
 
 
 
 
 
 
Table of Contents

Microsize micronizes and tests API for use in oral TPOXX®. The Company’s agreement with Microsize's predecessor was amended on January

11, 2019. The amended term ends on the tenth anniversary of the amendment date.

Catalent granulates, encapsulates, and tests oral TPOXX®. In addition, Catalent provides services related to commercial stability testing of drug
product  and  preparation  for  tabulated  stability  and  trend  analysis  for  each  time  point.  The  Company’s  agreement  with  Catalent  had  an  initial  term  that
ended on June 28, 2021. Thereafter, this agreement became subject to automatic renewal for three years unless either party provided six months' notice of
its desire to terminate the agreement prior to the expiration of the term.  The Company did not provide notice nor receive notice of termination. As such,
until June 28, 2027, SIGA will purchase all of its requirements for bulk product under the 19C BARDA Contract from Catalent.

PCI  provides  packaging  services  in  connection  with  oral  TPOXX®.  Additionally,  PCI  has  contracted  with  the  Company  to  provide  packaging
services in connection with the intravenous formulation of TPOXX®. The Company’s agreement with PCI had an initial term that ended on March 1, 2022.
Thereafter, this agreement automatically renews for successive one-year periods unless either party provides 120 days' notice of its desire to terminate the
agreement prior to the expiration of the term. Notice has not been provided by either party and, as such, the agreement has been automatically extended to
March 1, 2025.  The agreement can be terminated earlier than March 1, 2025 under certain conditions.

Intravenous (IV) formulation of TPOXX®:

For the manufacture of IV TPOXX® under the BARDA Contract, the Company has agreed to use the following CMOs: Roquette America, Inc.

(“Roquette”); Patheon Manufacturing Services LLC (“Patheon”); and PCI.

Roquette provides an excipient used in the manufacturing of IV TPOXX®. The Company's agreement with Roquette has no minimum amount of
manufacturing services that must be used. The Company’s agreement with Roquette had an initial term that ended on December 31, 2023. Thereafter, this
agreement automatically renews on a year-by-year basis unless either party provides four months’ notice of its desire to terminate the agreement prior to
the expiration of the term. The Company did not provide notice nor receive notice of termination. As such, the agreement has automatically extended to
December 31, 2024.

Patheon manufactures, tests and packages IV TPOXX®. SIGA agreed that Patheon will be entitled to manufacture at least 80% of IV TPOXX®
offered for sale by SIGA during the first three years of the agreement, provided Patheon adheres to reasonable manufacturing standards. Thereafter, the
manufacturing percentage will be as mutually agreed upon by the parties. The Company’s agreement with Patheon has an initial term that ends on the later
of: December 31, 2022 or, such date as all government contracts related to IV TPOXX® are terminated. As such, since the Company continues to have
active  government  contracts  related  to  IV  TPOXX®,  the  contract  term  continues.  At  the  end  of  the  above  mentioned  contract  term,  this  agreement
automatically  renews  for  two-year  increments  unless  either  party  provides  twelve  months’  notice  of  its  desire  to  terminate  the  agreement  prior  to  the
expiration of the term.

As noted above, PCI provides packaging services for IV TPOXX®. Grace provides the API used in manufacturing of the intravenous formulation.

Corporate Responsibility and Sustainability

SIGA focuses on the health security market and seeks to advance global health while promoting a sustainable environment.

SIGA  seeks  to  advance  global  public  health  through  its  development  and  commercial  activities,  which  include  (i)  delivering  medical
countermeasures  to  governments  and/or  non-governmental  organizations  ("NGOs")  so  that  governments  and/or  NGOs  can  cost-effectively  stockpile
treatments  for  potential  public  health  emergencies  and  (ii)  donating  therapies  to  NGOs  to  treat  patients  with  serious  infectious  diseases  in  developing
countries or those who are being treated on a compassionate basis and/or within clinical trials.

SIGA seeks to promote a sustainable environment by tracking the involvement of its manufacturing supply chain in initiatives and organizations
that  prioritize  a  sustainable  environment.  Almost  all  manufacturers  within  SIGA’s  supply  chain,  including  Grace,  Catalent,  PCI,  Patheon  and  Roquette,
maintain corporate social responsibility and/or sustainability programs and publicly report on those programs.

SIGA also pursues such policies within its own corporate environment, although SIGA's corporate scale is relatively too small to report separately

their impact.

7

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Market for Medical Countermeasures for Biological Threats

The market for medical countermeasures reflects continued awareness of the risks and threats of biological outbreaks, including such outbreaks
related  to  global  terror  and  biowarfare  activity.  The  U.S.  Government  is  the  largest  source  of  development  and  procurement  funding  for  academic
institutions and biopharmaceutical companies conducting medical countermeasure research or developing vaccines, anti-infectives and immunotherapies
directed at potential agents of bioterror or biowarfare. For the U.S. Government's fiscal year ended September 30, 2023, the budget for annual spending by
the U.S. Department of Health and Human Services ("HHS") for activities related to advanced development and procurement of medical countermeasures
for biodefense-related biological threats to civilian populations was more than $2.7 billion.

We believe that potential markets for the sale of medical countermeasures include:

•
•
•
•
•

The U.S. government, including both public health and defense agencies;
foreign governments, including both public health and defense agencies;
NGOs and multinational companies;
healthcare providers, including hospitals and clinics; and
state and local governments, which may be interested in procuring these products to protect, among others, emergency responders, such as
police, fire and emergency medical personnel.

8

 
 
 
 
 
 
 
 
 
 
 
Table of Contents

General

With  respect  to  U.S.  government  contracts,  we  receive  cash  payments  on  a  monthly  basis,  as  services  are  performed  or  goods  are  purchased.
Amounts under contract and grant agreements are not guaranteed and can be canceled at any time for reasons such as non-performance or convenience of
the  U.S.  Government  and,  if  canceled,  we  will  not  receive  funds  for  additional  work  under  the  agreements.  With  respect  to  international  government
contracts, we receive cash payments based on the terms contained within the International Promotion Agreement with Meridian, under which Meridian
collects payments from foreign governments.

Competition

The  biotechnology  and  pharmaceutical  industries  are  characterized  by  rapidly  evolving  technology  and  intense  competition.  Our  current  and
potential  competitors  include  many  major  pharmaceutical  companies,  many  of  which  have  significant  financial,  technical  and  marketing  resources.
Biotechnology  and  other  pharmaceutical  competitors  in  the  medical  countermeasure  sector  include,  but  are  not  limited  to,  Emergent  BioSolutions  Inc.
and Bavarian Nordic A/S. Academic institutions, governmental agencies and other public and private research organizations are also conducting research
activities and seeking patent protection and may commercialize products on their own or through joint ventures.

TPOXX®  faces  significant  competition  for  government  funding  for  both  development  and  procurement  of  medical  countermeasures  for

biological, chemical, radiological and nuclear threats, diagnostic testing systems, and other emergency preparedness countermeasures.

Our  commercial  opportunities  could  be  reduced  or  eliminated  if  our  competitors  develop  and  commercialize  products  that  are  safer,  more
effective, have fewer side effects, are more convenient or are less expensive than products that we may develop. In addition, we may not be able to compete
effectively if our product candidates do not satisfy governmental procurement requirements, particularly requirements of the U.S. Government with respect
to medical countermeasure products.

Human Capital Resources and Research Facilities

As  of  February  15,  2024,  we  had  45  full-time  employees.  None  of  our  employees  are  covered  by  a  collective  bargaining  agreement,  and  we
consider  our  employee  relations  to  be  satisfactory.    Our  human  capital  resources  objectives  include,  as  applicable,  identifying,  recruiting,  retaining,
incentivizing and integrating our existing and new employees, advisors and consultants with the overall goal of having an employee base that embraces
teamwork and shares a focus for using each person’s individual skills, experience and expertise in order to develop and maximize the value of corporate
assets, and achieve long-term revenue and earnings growth.

Our  research  and  development  facilities  are  located  in  Corvallis,  Oregon,  where  we  lease  approximately  10,276  square  feet  under  a  lease

agreement that commenced on January 1, 2018 and which expires in December 2024.

Intellectual Property and Proprietary Rights

An  important  element  of  SIGA’s  business  development  activities  involves  the  Company's  ability  to  obtain  and  maintain  patent  and  other
intellectual property protection in the U.S. and the rest of the world for its proprietary technologies, drug targets, and potential products and to preserve its
trade secrets. Because of the substantial length of time and expense associated with bringing potential products through the development and regulatory
clearance processes to reach the marketplace, the pharmaceutical industry places considerable importance on obtaining patent and trade secret protection.
The  patent  positions  of  pharmaceutical  and  biotechnology  companies  can  be  highly  uncertain  and  involve  complex  legal  and  factual  questions.  No
consistent policy regarding the breadth of claims allowed in biotechnology patents across various jurisdictions has emerged to date. Accordingly, SIGA
cannot predict the type and extent of claims that will be allowed in pending patent applications.

SIGA also relies upon trade secret protection for its confidential and proprietary information. No assurance can be given that other companies will
not independently develop substantially equivalent proprietary information and techniques or otherwise gain access to SIGA’s trade secrets or that SIGA
can meaningfully protect its trade secrets.

SIGA exclusively owns its key patent portfolios, which relate to its leading drug product, TPOXX® (also known as ST-246, tecovirimat). As of
January 17, 2024, the TPOXX® patent portfolio has seven patent families consisting of 30 U.S. utility patents, 109 issued foreign patents, two U.S. utility
patent applications, and 16 foreign patent applications.

The principal and material issued patents covering TPOXX® are described in the table below.

Patent Number
US 7737168
US 8039504
US 7687641

Country
United States
United States
United States

US 8124643

United States

US 7956197

United States

US 8530509

United States

Protection Conferred
Method of treating orthopoxvirus infection with ST-246
Pharmaceutical compositions and unit dosage forms containing ST-246
Method of manufacturing ST-246
Composition of matter for the ST-246 compound and Pharmaceutical
compositions containing ST-246
Method of manufacturing ST-246
Pharmaceutical compositions containing a mixture of compounds
including ST-246

Issue Date
June 15, 2010
October 18, 2011
March 30, 2010

Expiration Date
September 4, 2031
July 23, 2027
September 27, 2024

February 28, 2012 June 18, 2024

June 7, 2011

June 18, 2024

September 10, 2013June 18, 2024

9

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

US 8802714

United States

US 9045418
US 9233097

United States
United States

US 9339466

United States

US 9546137
US 9744154
US 9862683
US 9670158
US 9889119
US 9907859
US 10029985
US 10045963

United States
United States
United States
United States
United States
United States
United States
United States

US 10045964

United States

US 10124071
US 10155723

United States
United States

US 10406137

United States

US 10406103
US 10576165
US 10864282
US 10662155
US 10716759

United States
United States
United States
United States
United States

US 10933050

United States

US 11433051
US 11779566

United States
United States

SG 184201

Singapore

SG 10201506031U Singapore

RU 2578606

Russian Federation

OA 16109

OAPI ^/Africa

NZ 602578

New Zealand

MX 326231

Mexico

MX 348481

MX 347795
MX 361428
MX 363189
MX 368106
KR 101868117

JP 4884216

JP 5657489
JP 5898196

JP 6018041

JP 6188802
JP 6444460
JP 6564514

Mexico

Mexico
Mexico
Mexico
Mexico
Korea

Japan

Japan
Japan

Japan

Japan
Japan
Japan

Method of treating orthopoxvirus infection with a mixture of compounds
including ST-246
Method of manufacturing ST-246
Liquid Pharmaceutical formulations containing ST-246
Certain polymorph of ST-246, method of preparation of the polymorph
and pharmaceutical compositions containing the polymorph
Methods of preparing ST-246
Polymorphic forms of ST-246 and methods of preparation
Methods of preparing Tecovirimat
Amorphous Tecovirimat preparation
Amorphous Tecovirimat preparation
ST-246 liquid formulations and methods
Methods of preparing Tecovirimat
Amorphous Tecovirimat preparation
Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs
ST-246 liquid formulations and methods
Methods of preparing Tecovirimat
Certain polymorphs of ST-246 and pharmaceutical compositions
containing the polymorphs
Rehydration of micronized Tecovirimat monohydrate
Liquid Pharmaceutical formulations containing ST-246
Methods of preparing liquid formulations containing ST-246
Methods of preparing Tecovirimat
Rehydration of micronized Tecovirimat monohydrate
Certain polymorphs of ST-246 and pharmaceutical compositions
containing the polymorphs
ST-246 suspension formulations
ST-246 suspension formulations
Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs
ST-246 liquid formulations and methods
Certain polymorphs of ST-246, method of preparation of the polymorphs
and their use in treating orthopoxvirus
Certain polymorphs of ST-246, method of preparation of the polymorphs
and their use in treating orthopoxvirus
Certain polymorphs of ST-246, method of preparation of the polymorphs
and their use in treating orthopoxvirus
Pharmaceutical compositions containing ST-246 and one or more
additional ingredients and dosage unit forms containing ST-246
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
ST-246 liquid formulations and methods
Polymorphic forms of ST-246 and methods of preparation
Use of pharmaceutical compositions containing ST-246
ST-246 liquid formulations and methods
ST-246 liquid formulations and methods
Therapeutic agent for treating orthopoxvirus including ST-246,
pharmaceutical composition of matter for the ST-246 compound and
method of manufacturing ST-246
Method of manufacturing ST-246
Liquid Pharmaceutical formulations containing ST-246
Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs
Methods of preparing Tecovirimat
Methods of preparing Tecovirimat
Methods of preparing Tecovirimat

August 12, 2014

June 18, 2024

June 2, 2015
January 12, 2016 August 2, 2031

June 18, 2024

May 17, 2016

March 23, 2031

January 17, 2017 August 14, 2033
August 29, 2017 March 23, 2031
January 9, 2018
August 14, 2033
July 11, 2034
June 6, 2017
February 13, 2018 July 11, 2034
March 6, 2018
July 24, 2018
August 14, 2018

August 2, 2031
August 14, 2033
July 11, 2034

August 14, 2018 March 23, 2031

November 13, 2018 August 2, 2031
December 18, 2018 August 14, 2033

September 10, 2019March 23, 2031

September 10, 2019November 14, 2034
March 3, 2020
August 2, 2031
December 15, 2020 August 2, 2031
August 14, 2033
May 26, 2020
November 14, 2034
July 21, 2020

March 2, 2021

March 23, 2031

September 6, 2022 November 27, 2039
October 10, 2023

February 15, 2037

June 22, 2015

March 23, 2031

June 11, 2021

August 2, 2031

March 27, 2016 March 23, 2031

October 31, 2013 March 23, 2031

December 2, 2014 March 23, 2031

December 11, 2014 April 23, 2027

June 15, 2017

April 23, 2027

May 15, 2017
August 2, 2031
December 6, 2018 March 23, 2031
April 23, 2027
March 14, 2019
September 19, 2019August 2, 2031
August 2, 2031
June 8, 2018

December 16, 2011 June 18, 2024

December 5, 2014 June 18, 2024
March 11, 2016

August 2, 2031

October 7, 2016 March 23, 2031

August 10, 2017
August 14, 2033
December 7, 2018 August 14, 2033
August 14, 2033
August 2, 2019

10

 
 
Table of Contents

JP 6594303
JP 6843616
JP 7074677
JP 7297858
BR 112012023743-
8
BR 112013002646-
4

Japan
Japan
Japan
Japan

Brazil

Brazil

CN 2011800245893China

CN 2013800429237China
CN 2017103075357China
CN 2014800653387China
CN 202010101449 China

CA 2529761

Canada

CA 2685153

Canada

CA 2866037

CA 2807528
CA 2966466
CA 2882506

CA 2793533

CA 2917199
CA 2930461
CA 3090294

Canada

Canada
Canada
Canada

Canada

Canada
Canada
Canada

AU 2004249250

Australia

AU 2007351866

Australia

AU 2011232551

Australia

AU 2011285871
AU 2013302764

Australia
Australia

AU 2012268859

Australia

Australia
AU 2014290333
Australia
AU 2014353235
Australia
AU 2018201499
AU 2019208252
Australia
AU 20172211295 Australia
Australia
AU 2020202894

AP 3221

ARIPO*/Africa

ZA 2012/07141

South Africa

ZA 2013/00930

South Africa

IL 201736

IL 236944
IL 242665
IL 224430

IL 242666

IL 221991

IL 269370

IL 242331
IL 244731
IL 282098

Israel

Israel
Israel
Israel

Israel

Israel

Israel

Israel
Israel
Israel

Rehydration of micronized Tecovirimat monohydrate
Amorphous Tecovirimat preparation
ST-246 suspension formulations
ST-246 suspension formulations
Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs

November 14, 2034

October 4, 2019
February 29, 2021 July 11, 2034
May 24, 2022
June 16, 2023

February 15, 2037
February 15, 2037

February 18, 2020 March 23, 2031

Liquid Pharmaceutical formulations containing ST-246

January 4, 2022

August 2, 2031

Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs
Methods of preparing Tecovirimat
Methods of preparing Tecovirimat
Rehydration of micronized Tecovirimat monohydrate
Methods of preparing Tecovirimat
Use of ST-246 to treat orthopoxvirus infection, pharmaceutical
compositions containing ST-246 and composition of matter for the ST-246
compound
Pharmaceutical compositions containing ST-246 and one or more
additional ingredients and dosage unit forms containing ST-246
Chemicals, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Liquid Pharmaceutical formulations containing ST-246
Use of ST-246 to treat orthopoxvirus infections
Methods of preparing Tecovirimat
Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs
Amorphous Tecovirimat preparation
Rehydration of micronized Tecovirimat monohydrate
Methods of preparing Tecovirimat
Method of treating orthopoxvirus infection, pharmaceutical composition
containing ST-246 and composition of matter for the ST-246 compound
Pharmaceutical compositions containing ST-246 and one or more
additional ingredients and dosage unit forms containing ST-246
Certain polymorphs of ST-246, method of preparation of the polymorphs
and their use in treating orthopoxvirus
Liquid Pharmaceutical formulations containing ST-246
Methods of preparing Tecovirimat
Pharmaceutical compositions containing ST-246 and one or more
additional ingredients and dosage unit forms containing ST-246
Amorphous Tecovirimat preparation
Rehydration of micronized Tecovirimat monohydrate
Methods of preparing Tecovirimat
Rehydration of micronized Tecovirimat monohydrate
ST-246 suspension formulations
Methods of preparing Tecovirimat
Certain polymorphs of ST-246, method of preparation of the polymorphs
and their use in treating orthopoxvirus
Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs
Liquid Pharmaceutical formulations containing ST-246
Pharmaceutical compositions containing ST-246 and one or more
additional ingredients and dosage unit forms containing ST-246
Methods of preparing Tecovirimat
Methods of preparing intermediate in the preparation of Tecovirimat
Liquid Pharmaceutical formulations containing ST-246
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs
Compositions and methods for treatment and prevention of orthopoxvirus
infections and associated diseases
Amorphous Tecovirimat preparation
Rehydration of micronized Tecovirimat monohydrate
Rehydration of micronized Tecovirimat monohydrate

11

August 26, 2015 March 23, 2031

June 20, 2017
March 6, 2020
February 7, 2020 November 14, 2034
June 20, 2023

August 14, 2033
August 14, 2033

August 14, 2033

August 13, 2013

June 18, 2024

December 16, 2014 April 23, 2027

May 16, 2017

April 23, 2027

September 25, 2018August 2, 2031
April 23, 2027
August 25, 2020
October 20, 2020 August 14, 2033

February 26, 2019 March 23, 2031

August 31, 2021
August 16, 2022
January 24, 2023 August 14, 2033

July 11, 2034
November 14, 2034

March 29, 2012

June 18, 2024

January 10, 2013

June 18, 2024

February 26, 2015 March 23, 2031

August 6, 2015
April 5, 2018

August 2, 2031
August 14, 2033

August 18, 2016

June 18, 2024

February 21, 2019 July 11, 2034
August 22, 2019
May 21, 2020
July 2, 2020
May 2, 2022
July 7, 2022

November 14, 2034
August 14, 2033
November 14, 2034
February 15, 2037
August 14, 2033

April 3, 2015

March 23, 2031

June 29, 2016

March 23, 2031

November 25, 2015 August 2, 2031

October 1, 2016

April 23, 2027

February 1, 2017 August 14, 2033
February 1, 2020 April 23, 2027
December 27, 2019 August 2, 2031

December 1, 2018 April 23, 2027

October 1, 2019 March 23, 2031

December 1, 2020 April 23, 2027

March 1, 2021
September 1, 2021 November 14, 2034
November 14, 2034
April 3, 2023

July 11, 2034

 
 
Table of Contents

IL 260229

Israel

AT 1638938

Austria

BE 1638938

BE 2549871
BE 2600715

Belgium

Belgium
Belgium

CH 1638938

Switzerland

CH 2549871
CH 2600715

Switzerland
Switzerland

DE 1638938

Germany

DE 2549871
DE 2887938
DE 2600715
DE 3321253
DE 3021836
DE 3043793
DE 3763702

Germany
Germany
Germany
Germany
Germany
Germany
Germany

DK 1638938

Denmark

DK 2549871
DK 2600715

Denmark
Denmark

ES 1638938

Spain

FI 1638938

Finland

FR 1638938

FR 2887938
FR 2549871
FR 2600715
FR 3321253
FR 3021836
FR 3043793
FR 3763702

France

France
France
France
France
France
France
France

GB 1638938

United Kingdom

ST-246 suspension formulations
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Polymorphic forms of ST-246
Liquid Pharmaceutical formulations containing ST-246
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Polymorphic forms of ST-246
Liquid Pharmaceutical formulations containing ST-246
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Polymorphic forms of ST-246
Methods of preparing Tecovirimat
Liquid Pharmaceutical formulations containing ST-246
Methods of preparing Tecovirimat
Amorphous Tecovirimat preparation
Rehydration of micronized Tecovirimat monohydrate
Amorphous Tecovirimat preparation
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Polymorphic forms of ST-246
Liquid Pharmaceutical formulations containing ST-246
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Methods of preparing Tecovirimat
Polymorphic forms of ST-246
Liquid Pharmaceutical formulations containing ST-246
Methods of preparing Tecovirimat
Amorphous Tecovirimat preparation
Rehydration of micronized Tecovirimat monohydrate
Amorphous Tecovirimat preparation
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases

GB 2887938
GB 2549871
GB 2600715

United Kingdom Methods of preparing Tecovirimat
United Kingdom Polymorphic forms of ST-246
United Kingdom Liquid Pharmaceutical formulations containing ST-246

12

May 2, 2023

February 15, 2037

April 12, 2017

June 18, 2024

April 12, 2017

June 18, 2024

August 22, 2018 March 23, 2031
December 11, 2019 August 2, 2031

April 12, 2017

June 18, 2024

August 22, 2018 March 23, 2031
December 11, 2019 August 2, 2031

April 12, 2017

June 18, 2024

August 22, 2018 March 23, 2031
January 10, 2018 August 14, 2033
December 11, 2019 August 2, 2031
February 12, 2020 August 14, 2033
August 27, 2020
January 6, 2021
December 13, 2023 July 11, 2034

July 11, 2034
November 14, 2034

April 12, 2017

June 18, 2024

August 22, 2018 March 23, 2031
December 11, 2019 August 2, 2031

April 12, 2017

June 18, 2029

April 12, 2017

June 18, 2024

April 12, 2017

June 18, 2024

January 10, 2018 August 14, 2033
August 22, 2018 March 23, 2031
December 11, 2019 August 2, 2031
February 12, 2020 August 14, 2033
August 27, 2020
January 6, 2021
December 13, 2023 July 11, 2034

July 11, 2034
November 14, 2034

April 12, 2017

June 18, 2024

January 10, 2018 August 14, 2033
August 22, 2018 March 23, 2031
December 11, 2019 August 2, 2031

 
 
Table of Contents

GB 3321253
GB 3021836
GB 3043793
GB 3763702

United Kingdom Methods of preparing Tecovirimat
United Kingdom Amorphous Tecovirimat preparation
United Kingdom Rehydration of micronized Tecovirimat monohydrate
United Kingdom Amorphous Tecovirimat preparation

HK 1179824

Hong Kong

HK 1184639

Hong Kong

IE 1638938

Ireland

IT
502017000078377

Italy

NL 1638938

Netherlands

PL 1638938

Poland

SE 1638938

Sweden

Certain polymorphs of ST-246, method of preparation of the polymorphs
and pharmaceutical compositions containing the polymorphs
Liquid Pharmaceutical formulations containing ST-246
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases
Compounds, compositions and methods for treatment and prevention of
orthopoxvirus infections and associated diseases

February 12, 2020 August 14, 2033
August 27, 2020
January 6, 2021
December 13, 2023 July 11, 2034

July 11, 2034
November 14, 2034  

June 21, 2019

March 23, 2031

November 12, 2021 October 28, 2033

April 12, 2017

June 18, 2024

April 12, 2017

June 18, 2029

April 12, 2017

June 17, 2029

April 12, 2017

June 18, 2024

April 12, 2017

June 18, 2029

*African Regional Intellectual Property Organization ("ARIPO") designated contracting states are as follows: Botswana, Gambia, Ghana, Kenya,

Lesotho, Liberia, Malawi, Mozambique, Namibia, Sierra Leone, Sudan, Swaziland, Tanzania, Uganda, Zambia, and Zimbabwe.

^Organisation Africaine de la Propriété Intellectuelle ("OAPI") designated contracting states are as follows: Benin, Burkina Faso, Cameroon, the

Central African Republic, Chad, DRC, Côte d’Ivoire, Equatorial Guinea, Gabon, Guinea, Guinea-Bissau, Mali, Mauritania, the Niger, Senegal, and Togo.

In  addition  to  the  patents  listed  in  the  above  chart,  the  principal  and  material  patent  applications  covering  TPOXX®  include  patent  filings  in
multiple  jurisdictions,  including  the  United  States,  Europe,  Asia,  Australia,  and  other  commercially  significant  markets.  We  hold  18  patent  applications
currently pending with respect to various compositions of TPOXX®, methods of manufacturing, and methods of treatment. Expiration dates for pending
patent applications, if granted, will fall between 2031 and 2037.

FDA  regulations  require  that  patented  drugs  be  sold  under  brand  names  that  comply  with  various  regulations.  SIGA  must  develop  and  make
efforts to protect these brand names for each of its products in order to avoid product piracy and to secure exclusive rights to these brand names. SIGA may
expend substantial funds in developing and securing rights to adequate brand names for our products. SIGA currently has proprietary trademark rights in
SIGA®, TPOXX® and other brands used by us in the United States and certain foreign countries, but we may have to develop additional trademark rights
in order to comply with regulatory requirements. SIGA may need to pursue different names and trademarks outside of the U.S. in light of native language
and other jurisdictional considerations. SIGA considers securing adequate trademark rights to be important to its business.

Government Regulation

Regulatory Approval Process

Regulation by governmental authorities in the United States and other countries is a significant factor in the manufacture and marketing of any
biopharmaceutical product that we may develop. The nature and the extent to which such regulations apply to us vary depending on the nature of each
product. In particular, human therapeutic products are subject to rigorous pre-clinical and clinical testing and other approval procedures by the FDA and
similar health authorities in foreign countries. Various federal statutes and regulations also govern or regulate the manufacturing, safety, labeling, storage,
recordkeeping  and  marketing  of  such  products.  The  process  of  obtaining  these  approvals  and  the  subsequent  compliance  with  appropriate  federal  and
foreign statutes and regulations are complex and require expertise and the expenditure of substantial resources.

In  order  to  test  clinically,  and  to  manufacture  and  market  products  for  diagnostic  or  therapeutic  use,  a  company  must  comply  with  mandatory
procedures  and  safety  standards  established  by  the  FDA  and  comparable  agencies  in  foreign  countries.  Before  beginning  human  clinical  testing  of  a
potential new drug in the United States, a company must file an Investigational New Drug ("IND") application and receive clearance from the FDA. An
IND application is a summary of the pre-clinical studies that were conducted to characterize the drug, including toxicity and safety studies, information on
the drug’s composition and the manufacturing and quality control procedures used to produce the drug, as well as a discussion of the human clinical studies
that are being proposed to evaluate the safety and efficacy of the product.

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The pre-marketing clinical program required for approval by the FDA for a new drug typically involves a time-consuming and costly three-phase
process.  In  Phase  I,  trials  are  conducted  with  a  small  number  of  healthy  subjects  to  determine  the  early  safety  profile,  the  pattern  of  drug  distribution,
metabolism and elimination. In Phase II, trials are conducted with small groups of patients afflicted with a target disease in order to determine preliminary
efficacy, optimal dosages and expanded evidence of safety. In Phase III, large scale, multi-center comparative trials, which may include both controlled and
uncontrolled studies, are conducted with patients afflicted with a target disease in order to provide enough data for statistical proof of efficacy and safety
required by the FDA and other authorities. Additional trials may be required to evaluate how a new drug interacts with other drugs as well as if the drug has
any impact on cardio-vascular or other potential risks.

The  FDA  closely  monitors  the  progress  of  each  of  the  three  phases  of  clinical  testing  and  may,  in  its  discretion,  reevaluate,  alter,  suspend  or
terminate the testing based on the data that have been accumulated to that point and its assessment of the risk/benefit ratio to the patients involved in the
testing. Estimates of the total time typically required for carrying out such clinical testing vary between two and 10 years. Upon completion of such clinical
testing, a company typically submits an NDA to the FDA that summarizes the results and observations of the drug during the clinical testing. Based on its
review of the NDA, the FDA will decide whether to approve the drug and whether to impose any marketing restrictions or require additional post-approval
clinical studies. This review process can be quite lengthy, and approval for the production and marketing of a new pharmaceutical product can require a
number of years and substantial funding. There can be no assurance that any approval will be granted on a timely basis, if at all. In some circumstances, a
new formulation of an approved product may be reviewed through a supplemental NDA process which relies in part on the prior approval of the initial
formulation.

The FDA amended its regulations, effective June 30, 2002, to include the “Animal Rule” in circumstances that would permit the typical clinical
testing regime to approve certain new drug and biological products used to reduce or prevent the toxicity of chemical, biological, radiological, or nuclear
agents not otherwise naturally present for use in humans based on evidence of safety in healthy subjects and evidence of effectiveness derived only from
appropriate  animal  studies  and  any  additional  supporting  data.  The  FDA  has  indicated  that  approval  for  therapeutic  use  of  TPOXX®  for  smallpox  was
determined under the “Animal Rule.”

Once  the  product  is  approved  for  sale,  FDA  regulations  govern  the  manufacturing  and  marketing  activities,  and  a  post-marketing  testing  and
surveillance  program  may  be  required  to  monitor  a  product’s  usage  and  effects.  Product  approvals  may  be  withdrawn  if  compliance  with  regulatory
standards is not maintained. Many other countries in which products developed by us may be marketed impose similar regulatory processes.

FDA regulations also make available an alternative regulatory mechanism that may lead to use of the product under limited circumstances. The
Emergency Use Authorization (“EUA”) authority allows the FDA Commissioner to strengthen the public health protections against biological, chemical,
radiological and nuclear agents that may be used to attack the American people or the U.S. armed forces. Under this authority, the FDA Commissioner may
allow medical countermeasures to be used in an emergency to diagnose, treat or prevent serious or life-threatening diseases or conditions caused by such
agents when appropriate findings are made concerning the nature of the emergency, the availability of adequate and approved alternatives, and the quality
of available data concerning the drug candidate under consideration for emergency use.

In addition to regulations in the United States, we are subject to a variety of foreign regulations governing clinical trials and commercial sales and
distribution of our products. Whether or not we obtain FDA approval for a product, we must obtain approval by the comparable regulatory authorities of
foreign countries or economic areas, such as the European Union (“EU”) and the United Kingdom (UK), before we may commence clinical trials or market
products  in  those  countries  or  areas.  The  approval  process  and  requirements  governing  the  conduct  of  clinical  trials,  product  authorization,  pricing  and
reimbursement vary greatly from place to place, and the time may be longer or shorter than that required for FDA approval. 

Under EU regulatory systems, a company may submit marketing authorization applications either under a centralized or decentralized procedure.
The centralized procedure is compulsory for medicinal products produced by biotechnology or those medicinal products containing new active substances
for specific indications such as the treatment of AIDS, cancer, neurodegenerative disorders, diabetes, viral diseases and designated orphan medicines, and
optional for other medicines which are highly innovative. Under the centralized procedure, a marketing application is submitted to the European Medicines
Agency (EMA) where it will be evaluated by the Committee for Medicinal Products for Human Use and a favorable opinion typically results in the grant
by the European Commission of a single marketing authorization that is valid for all EU Member States within 67 days of receipt of the opinion. The initial
marketing authorization is valid for five years, but once renewed is usually valid for an unlimited period. The decentralized procedure provides for approval
by one or more “concerned” member states based on an assessment of an application performed by one member state, known as the “reference” member
state. Under the decentralized approval procedure, an applicant submits an application, or dossier, and related materials to the reference member state and
concerned member states. The reference member state prepares a draft assessment and drafts of the related materials within 120 days after receipt of a valid
application. Within 90 days of receiving the reference member state’s assessment report, each concerned member state must decide whether to approve the
assessment report and related materials. If a member state does not recognize the marketing authorization, the disputed points are eventually referred to the
European  Commission,  whose  decision  is  binding  on  all  member  states.  On  January  10,  2022,  the  EMA  approved  SIGA’s  Marketing  Authorisation
Application (MAA) for oral tecovirimat, the same formulation that was approved by the FDA in July 2018 under the brand name TPOXX®. The EMA
approval  includes  labeling  for  oral  tecovirimat  indicating  its  use  for  the  treatment  of  smallpox,  mpox,  cowpox,  and  vaccinia  complications  following
vaccination against smallpox. The MAA was filed under the centralized application process, which, upon approval, enables sales, including procurement
for stockpiling, of oral tecovirimat in all European Union (EU) member states, as well as Norway, Iceland, and Liechtenstein.

The United Kingdom left the European Union on January 31, 2020 (commonly referred to as “Brexit”), with a transitional period that expired on
December 31, 2020. The United Kingdom and the European Union entered into a trade agreement known as the Trade and Cooperation Agreement, which
went into effect on January 1, 2021. On July 8, 2022, the United Kingdom’s Medicines and Healthcare products Regulatory Agency (“MHRA”) approved
oral tecovirimat for the treatment of smallpox, mpox, cowpox, and vaccinia complications following vaccination against smallpox in adults and children
with a body weight of at least 13kg. Since the regulatory framework in the United Kingdom covering the quality, safety and efficacy of pharmaceutical
products, clinical trials, marketing authorization, commercial sales and distribution of medicinal products is derived from EU Directives and Regulations,
Brexit could materially impact the future regulatory regime which applies to products and the approval of other product candidates in the United Kingdom.

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Legislation and Regulation Related to Bioterrorism Counteragents and Pandemic Preparedness

Because our drug candidates are intended for the treatment of diseases that may result from acts of bioterrorism or biowarfare or for pandemic

preparedness, they may be subject to the specific legislation and regulation described below and elsewhere in this Annual Report on Form 10-K.

Project BioShield

Project  BioShield  and  related  2006  federal  legislation  provide  procedures  for  biodefense-related  procurement  and  awarding  of  research  grants,
making  it  easier  for  HHS  to  commit  funds  to  countermeasure  projects.  Project  BioShield  provides  alternative  procedures  under  the  Federal  Acquisition
Regulation,  the  general  rubric  for  acquisition  of  goods  and  services  by  the  U.S.  Government,  for  procuring  property  or  services  used  in  performing,
administering or supporting biomedical countermeasure research and development. In addition, if the Secretary of HHS deems that there is a pressing need,
Project BioShield authorizes the Secretary of HHS to use an expedited award process, rather than the normal peer review process, for grants, contracts and
cooperative agreements related to biomedical countermeasure research and development activity.

Under Project BioShield, the Secretary of HHS, with the concurrence of the Secretary of the U.S. Department of Homeland Security and upon the
approval of the President, can contract to purchase unapproved countermeasures for the Strategic Stockpile in specified circumstances. The U.S. Congress
is notified of a recommendation for a Strategic Stockpile purchase after Presidential approval. Project BioShield specifies that a company supplying the
countermeasure  to  the  Strategic  Stockpile  is  paid  on  delivery  of  a  substantial  portion  of  the  countermeasure.  To  be  eligible  for  purchase  under  these
provisions, the Secretary of HHS must determine that there are sufficient and satisfactory clinical results or research data, including data, if available, from
pre-clinical and clinical trials, to support a reasonable conclusion that the countermeasure will qualify for approval or licensing within eight years. Project
BioShield also allows the Secretary of HHS to authorize the emergency use of medical products that have not yet been approved by the FDA. To exercise
this authority, the Secretary of HHS must conclude that:

•

•

•

•

the agent for which the countermeasure is designed can cause serious or life-threatening disease;

the product may reasonably be believed to be effective in detecting, diagnosing, treating or preventing the disease;

the known and potential benefits of the product outweigh its known and potential risks; and

there is no adequate alternative to a product that is approved and available.

Although this provision permits the Secretary of HHS to circumvent FDA approval (entirely, or in part) for procurement and use, its use in this

manner would likely be limited to rare circumstances. 

Public Readiness and Emergency Preparedness Act

The Public Readiness and Emergency Preparedness Act (the "PREP Act") provides immunity for manufacturers from claims under state or federal
law for “loss” arising out of the administration or use of a “covered countermeasure” in the United States. However, injured persons may still bring a suit
for “willful misconduct” against the manufacturer under some circumstances. “Covered countermeasures” include security countermeasures and “qualified
pandemic or epidemic products,” including products intended to diagnose or treat pandemic or epidemic disease, as well as treatments intended to address
conditions caused by such products. For these immunities to apply, the Secretary of HHS must issue a declaration in cases of public health emergency or
“credible risk” of a future public health emergency. Since 2007, the Secretary of HHS has issued nine declarations under the PREP Act to protect from
liability countermeasures that are necessary to prepare the nation for potential pandemics or epidemics, including a declaration on October 10, 2008 that
provides immunity from tort liability as it relates to smallpox. The PREP Act Declaration for smallpox countermeasures was amended by the Secretary of
HHS in 2022 to emphasize that it covers mpox virus, add qualified persons to administer vaccines and therapeutics to address the current public health
emergency caused by the 2022 outbreak of mpox cases and the risk of future public health threats arising from orthopoxviruses, and to extend protection
from December 31, 2022 to December 31, 2032.

Foreign Regulation

As noted above, in addition to regulations in the United States, we might be subject to a variety of foreign regulations governing clinical trials and
commercial sales and distribution of our drug candidates. Regardless of any FDA approval of a product, we may have to obtain approval of that product by
the comparable regulatory authorities of foreign countries before we can commence clinical trials or marketing of the product in those countries. The actual
time required to obtain clearance to market a product in a particular foreign jurisdiction varies substantially, based upon the type, complexity and novelty of
the pharmaceutical drug candidate, the specific requirements of that jurisdiction, and in some countries whether the FDA has previously approved the drug
for marketing. The requirements governing the conduct of clinical trials, marketing authorization, pricing and reimbursement vary from country to country.
Certain foreign jurisdictions, including the European Union and Canada, have adopted certain biodefense-specific regulations akin to those available in the
United States such as a procedure similar to the “Animal Rule” promulgated by the FDA for review and potential approval of biodefense products.

Regulations Regarding Government Contracting

The status of an organization as a government contractor in the United States and elsewhere means that the organization is also subject to various
statutes and regulations, including the Federal Acquisition Regulation, which governs the procurement of goods and services by agencies of the United
States. These governing statutes and regulations can impose stricter penalties than those normally applicable to commercial contracts, such as criminal and
civil  damages  liability  and  suspension  and  debarment  from  future  government  contracting.  In  addition,  pursuant  to  various  statutes  and  regulations,
government  contracts  can  be  subject  to  unilateral  termination  or  modification  by  the  government  for  convenience  in  the  United  States  and  elsewhere,
detailed auditing requirements, statutorily controlled pricing, sourcing and subcontracting restrictions and statutorily mandated processes for adjudicating
contract disputes.

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Availability of Reports and Other Information

We file annual, quarterly, and current reports, proxy statements, and other documents with the U.S. Securities and Exchange Commission ("SEC")
under the Exchange Act. The SEC maintains an Internet website that contains reports, proxy and information statements, and other information regarding
issuers, including us, that file electronically with the SEC. The public can obtain any document that we file with or furnish to the SEC at www.sec.gov.

In addition, our website can be found on the internet at www.siga.com. The website contains information about us and our operations. Copies of
each of our filings with the SEC on Form 10-K, Form 10-Q, and Form 8-K, and all amendments to those reports, can be viewed and downloaded free of
charge as soon as reasonably practicable after the reports and amendments are electronically filed with or furnished to the SEC. To view the reports, access
www.siga.com,  click  on  “Investors”  and  “Financial  Information.”  The  information  contained  on  the  websites  referenced  in  this  Form  10-K  is  not
incorporated by reference into this filing.

 The following corporate governance related documents are also available on our website:

•

•

•

•

Audit Committee Charter;

Compensation Committee Charter;

Nominating and Corporate Governance Committee Charter; and

Code of Ethics and Business Conduct.

To review these documents, access www.siga.com and click on “Investors” and “Corporate Governance.”

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Item 1A. Risk Factors

This report contains forward-looking statements and other prospective information relating to future events. These forward-looking statements and other
information are subject to risks and uncertainties that could cause our actual results to differ materially from our historical results or currently anticipated
results, including the following:

Risks Related to Our Dependence on Government Contracts

Government contracts require ongoing funding decisions by governments. A substantial percentage of our potential revenues come from government
contracts. The majority of potential revenue under the 19C BARDA Contract, the Company's largest procurement contract, is tied to options which
may or may not be exercised at the sole discretion of BARDA. Reduced or discontinued BARDA funding, or the non-exercise of contract options under
the 19C BARDA Contract, could cause our business, financial condition, results of operations and prospects to suffer materially.

Government-funded contracts often consist of standalone procurement orders or a base period of performance and options for the performance of
certain future activities. The value of goods and services subject to options may constitute the majority of the total value of the underlying contract, as in
the case of the 19C BARDA Contract.

The  funding  of  government  programs,  which  fund  BARDA’s  purchases  under  the  19C  BARDA  Contract,  is  subject  to  Congressional
appropriations,  generally  made  on  a  fiscal  year  basis  even  though  a  program  may  continue  for  several  years.  Our  government  customers  are  subject  to
political  considerations  and  budgetary  constraints,  which  result  in  uncertainties  as  to  continued  funding  of  their  ongoing  programs,  including  SIGA’s
contracts.

As of December 31, 2023, most of the remaining contract value of the 19C BARDA Contract is tied to options exercisable in the sole discretion of
BARDA. There is no guarantee that any of the remaining options will be exercised, or if they are exercised when such exercise of options will occur. If
some of these options are not exercised, because levels of government expenditures and authorizations for biodefense decrease or shift to other programs,
or for any other reason, our business, financial condition, results of operations and prospects may suffer materially.

Government procurement contracts are mostly set at fixed prices determined at inception of the contract based on estimates of the time, resources and
expenses required to perform these contracts. If our estimates are not accurate, we may not be able to earn an adequate return or may incur a loss
under these arrangements.

Remaining unexercised options under current government procurement contracts, including the 19C BARDA Contract, are predominately fixed-
price.  We  expect  that  our  future  contracts  with  the  U.S.  Government  and  foreign  governments  for  TPOXX®,  as  well  as  contracts  for  other  biodefense
product candidates, would also be predominantly fixed-price arrangements with potential moderate annual increases. Under a fixed-price contract, we are
required to deliver our products at a fixed price determined at the inception of the contract regardless of the actual costs we incur, and to absorb any costs
incurred  in  satisfaction  of  our  obligations.  Our  failure  to  anticipate  significant  technical  problems,  estimate  costs  accurately  or  control  costs  during
performance of a fixed-price contract could reduce the profitability of such contract, or if severe, cause a loss, which could in turn negatively affect our
operating results.

We expect a substantial percentage of our future operating revenues to come from contracts with BARDA for the provision and maintenance of the
U.S. Government’s stockpile of TPOXX®. If BARDA does not enter into additional contracts after the 19C BARDA Contract to maintain or expand the
stockpile of TPOXX®, our long-term business, financial condition and operating results could be materially harmed.

The  success  of  our  business  and  our  operating  results  for  the  foreseeable  future  will  be  substantially  dependent  on  the  U.S.  Government’s
commitment  to  maintaining  or  expanding  its  stockpile  of  TPOXX®.  Failure  to  secure  and  perform  additional  U.S.  Government  contracts  after  the  19C
BARDA Contract to substantially maintain or expand the U.S. Government stockpile of TPOXX® could have a material adverse effect on our long-term
business, financial condition, results of operations and prospects. Additionally, the 19C BARDA Contract does not necessarily increase the likelihood that
we will secure future comparable contracts with the U.S. Government.

Laws and regulations affecting government contracts and grants might make it more costly and difficult for us to successfully conduct our business.

Our  business  with  the  U.S.  Government,  international  governments,  and  any  future  business  with  state  and  local  governmental  agencies
are  subject  to  specific  procurement  regulations  and  a  variety  of  other  legal  and  compliance  obligations.  These  laws  and  rules  include  those  related  to
procurement integrity, rates and pricing of services and goods to be reimbursed by the U.S. Government, export control, government security regulations,
employment practices, protection of the environment, accuracy of records and the recording and reporting of costs, and foreign corrupt practices.  Among
the most significant government contracting regulations that affect our business are:

•

the  Federal  Acquisition  Regulation  and  other  agency-specific  regulations  supplemental  to  the  Federal  Acquisition  Regulation,  which
comprehensively regulate the procurement, formation, administration and performance of U.S. government contracts;  

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•

•

the business ethics and public integrity obligations, which govern conflicts of interest and the hiring of former government employees, restrict the
granting  of  gratuities  and  funding  of  lobbying  activities  and  incorporate  other  requirements  such  as  the  Anti-Kickback  Act  and  the  Foreign
Corrupt Practices Act ("FCPA"); and

export  and  import  control  laws  and  regulations,  including  laws,  regulations  and  executive  orders  restricting  the  use  and  dissemination  of
information classified for national security purposes and the exportation of certain products and technical data.

Compliance with these obligations increases our performance and compliance costs. Failure to comply with these regulations and requirements
could lead to suspension or debarment, for cause, from government contracting or subcontracting for a period of time and could result in significant civil or
criminal penalties. The termination of a government contract as a result of our failure to satisfy any of these obligations would have a material negative
impact on our operations and harm our reputation and ability to procure other government contracts or grants in the future.

Unfavorable provisions in government contracts and grants, some of which may be customary, may harm our future business, financial condition and
potential operating results.

Government contracts and grants customarily contain provisions that give the government substantial rights and remedies, many of which are not

typically found in commercial contracts, including (but not limited to) provisions that allow the government to:

•

•

•

•

•

•

•

•

•

terminate existing contracts or grants, in whole or in part, for any reason or no reason;

unilaterally reduce or modify grants, contracts or subcontracts, including through the use of equitable price adjustments;

cancel multi-year contracts or grants and related orders if funds for performance for any subsequent year become unavailable;

decline to exercise an option to renew, or to exercise the maximum amount specified in, a contract or grant;

claim rights to products or assets, including intellectual property, developed under a contract or grant;

take actions that result in a longer development timeline or higher costs than expected;

suspend or debar a contractor from doing business with the government or a specific government agency due to regulatory or compliance failures;

pursue criminal or civil remedies under the False Claims Act and the False Statements Accountability Act; and

control or prohibit the export of products.

Generally,  government  contracts  contain  provisions  permitting  unilateral  termination  or  modification,  in  whole  or  in  part,  at  the  government’s
convenience.  Under  general  principles  of  government  contracting  law,  if  the  government  terminates  a  contract  or  grant  for  convenience,  the  terminated
company may recover only its incurred or committed costs, settlement expenses and profit on work completed prior to the termination. If the government
terminates a contract or grant for default, the defaulting company is entitled to recover costs incurred and associated profits on accepted items only and may
be liable for excess costs incurred by the government in procuring undelivered items from another source. Our government contracts and grants could be
terminated under these circumstances.

A U.S. Government shutdown could negatively impact our business and liquidity.

Each  year,  the  U.S.  Congress  must  pass  all  spending  bills  in  the  federal  budget.  If  any  such  spending  bill  is  not  timely  passed,  a  government
shutdown may close many federally run operations, and halt work for federal employees unless they are considered essential or such work is separately
funded by a continuing resolution or by industry. If a government shutdown were to occur, we could experience a delay in contract funding decisions by the
government. Additionally, we could be materially harmed by any prolonged government shutdown.

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Our business could be adversely affected by a negative audit by the U.S. Government.

U.S. Government agencies, such as the Defense Contract Audit Agency (the “DCAA”), routinely audit and investigate government contractors.
These  agencies  review  a  contractor’s  performance  under  its  contracts  and  grants,  cost  structure,  and  compliance  with  applicable  laws,  regulations  and
standards.

The DCAA also reviews the adequacy of, and a contractor’s compliance with, its internal control systems and policies, including the contractor’s
purchasing, property, estimating, compensation and management information systems. Any cost found to be improperly allocated to a specific contract will
not be reimbursed, and such costs already reimbursed must be refunded. If an audit uncovers improper or illegal activities, a contractor may be subject to
civil  and  criminal  penalties  and  administrative  sanctions,  including  termination  of  contracts,  forfeiture  of  profits,  suspension  of  payments,  fines  and
suspension, debarment or prohibition from doing business with the U.S. Government.  Such actions would also negatively affect our reputation.

Risks Related to Regulatory Approvals

If we are not able to obtain regulatory approvals for certain additional indications of TPOXX® from the FDA, we may not be able to realize the full
benefits  of  any  U.S.  Government  contracts  or  may  not  be  able  to  commercialize  such  indications  other  than  through  existing  sales  to  the  U.S.
Government, and our ability to generate future revenue could be materially impaired.

The development and full commercialization of additional indications of TPOXX® in the U.S., such as the indication of use for post-exposure
prophylaxis or treatment of mpox, including the testing, manufacture, safety, efficacy, recordkeeping, labeling, storage, approval, advertising, promotion,
sale and distribution, are subject to comprehensive regulation by the FDA and other regulatory agencies in the United States and by comparable authorities
in other countries and jurisdictions. We could fail to achieve FDA or other regulatory approval of certain indications of TPOXX®, or there could be delays
in  such  approval  of  TPOXX®,  or  the  approved  labeling  for  such  indications  of  TPOXX®  may  differ  from  expectations.  Failure  to  obtain  regulatory
approval of certain indications for TPOXX® may prevent us from fully commercializing TPOXX® in the United States for the mpox indication or may
prevent  us  from  getting  procurement  orders  from  the  U.S.  Government  for  the  post-exposure  prophylaxis  indication  and  may  impact  other  regulatory
authorities' future review of other indications of TPOXX®, which in turn, could adversely impact commercializing TPOXX® in other countries, and such
delays or required alterations to regulatory applications could also have a material adverse effect on future revenue opportunities for the Company.

Failure  to  obtain  future  regulatory  approval  in  additional  international  jurisdictions  could  prevent  us  from  marketing  our  products  in  certain
jurisdictions abroad.

To market our products in certain additional foreign jurisdictions, we may need to obtain separate regulatory approvals and comply with numerous
and  varying  regulatory  requirements.  The  approval  procedure  varies  among  countries  and  can  involve  additional  testing  and  differing  manufacturing  or
labeling requirements. Complying with such requirements may take additional time prior to approval and delay commercial activities in those jurisdictions.

The  foreign  regulatory  approval  process  may  include  all  of  the  risks  associated  with  obtaining  FDA  approval  for  expanded  indications  or  new
formulations of TPOXX®. We may not obtain additional foreign regulatory approvals on a timely basis, if at all. Regulatory approval by the FDA, which
we obtained for oral TPOXX®, or by a foreign regulatory authority such as Health Canada and the European Medicines Agency, which we obtained for
oral TPOXX®, does not ensure approval by future additional regulatory authorities in other foreign countries or jurisdictions or by the FDA for expanded
indications or new formulations. In addition, failure to obtain approval in one jurisdiction may impact our ability to obtain approvals elsewhere. We may
not be able to file for or receive necessary regulatory approvals to commercialize our products in additional new markets, in which case, our target market
may be reduced and our ability to realize the full market potential of our product candidates may be harmed and our business, financial condition, results of
operations and prospects may be adversely affected.

Risks Related to Commercial and International Activities

We cannot predict whether or when we will be permitted to commercialize TPOXX® in the U.S. other than the oral and intravenous formulations for
smallpox treatment.

We  have  received  FDA  approval  for  the  oral  and  intravenous  formulations  of  TPOXX®  in  the  U.S.,  not  the  liquid  suspension/pediatric
formulation,  or  any  other  indication  beyond  treatment  for  smallpox,  for  TPOXX®.  Because  pharmaceutical  manufacturers  are  only  permitted  to
commercialize indications and formulations that have received FDA approval (or in other jurisdictions according to their applicable regulatory and legal
frameworks), any regulatory or legal setbacks as described above could have an adverse impact on the Company’s ability to sell other formulations or for
other uses of TPOXX® pending such approvals.

Changing political or social factors and opposition, such as protests and potential related litigation, may delay or impair our ability to market TPOXX®
and any other biodefense product candidates and may require us to spend time and money to address these issues.

Products developed to treat diseases caused by or to combat the threat of bioterrorism or biowarfare are subject to changing political and social
environments. The political and social responses to bioterrorism and biowarfare have been unpredictable and much debated. Changes in the perception of
the risk that military personnel or civilians could be exposed to biological agents as weapons of bioterrorism or biowarfare may delay or cause resistance to
bringing investigational products to market or limit pricing or purchases of approved products, any of which could materially harm our business.

Lawsuits,  protests  or  other  negative  publicity  may  adversely  affect  the  degree  of  market  acceptance  of,  and  thereby  limit  the  demand  for,
TPOXX® and our biodefense product candidates. In such event, our ability to market and sell such products may be hindered, the commercial success of
TPOXX®  and  other  products  we  develop  may  be  harmed  and  we  may  need  to  expend  time,  attention  and  resources  addressing  such  legal  or  publicity
issues, thereby reducing our revenues and having a material adverse impact on us.

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Our ability to grow our business partly depends on our ability to achieve recurring sales of TPOXX® to customers other than the U.S. Government,
which may expose us to risks associated with conducting business in international markets.

An element of our business strategy is to sell TPOXX® internationally to foreign governments on a recurring basis. These non-U.S. Government
customers include foreign governments, as well as state and local governments, non-governmental organizations focused on global health like the World
Health  Organization,  health  care  institutions  like  hospitals  (domestic  and  foreign)  and  certain  large  business  organizations  interested  in  protecting  their
employees against global threats and protecting first responders in cases of emergencies.

If we fail to obtain recurring sales of TPOXX® to customers other than the U.S. Government, our business and opportunities for growth could be

limited.

•

•

•

•

•

In addition, the expansion of our international presence may increase certain risks, which include:

foreign governments imposing withholding or other taxes on remittances and other payments to us or the amount of any such taxes may increase;

potential  difficulties  enforcing  agreements,  making  product  deliveries,  satisfying  product  and  process  requirements  of  non-U.S.  jurisdictions,
collecting receivables and protecting our intellectual property and other assets;

regional safety and security considerations;

increased costs and risks relating to exportation, shipping and transportation of the Company’s products; and

increased management and infrastructure costs.

See the risk factor below titled “The Company is subject to complex and changing laws and regulations worldwide, which exposes the Company to
potential liability, increased cost, and other adverse effects on the Company’s business” for more discussion of this risk. We cannot predict the ultimate
impact such events might have on the Company’s business, financial condition and results of operations.

Our current international revenues depend heavily on the success of the efforts of Meridian pursuant to an International Promotion Agreement. 

Pursuant  to  the  International  Promotion  Agreement  described  under  “Business,”  we  granted  a  third  party,  Meridian  Medical  Technologies
("Meridian") exclusive rights to market, advertise, promote, offer for sale, or sell oral TPOXX® in all geographic regions except for the United States (the
“Territory”), and Meridian agreed not to commercialize any competing product, as defined in the International Promotion Agreement, in the specified field
of use in the Territory. As long as the International Promotion Agreement is in force, our future international revenues will likely depend heavily on the
success of the efforts of Meridian pursuant to the International Promotion Agreement, which may not be successful. If we do not renew the International
Promotion  Agreement,  our  ability  to  maintain  existing  international  customer  relationships  and  contracts  as  well  as  generate  future  international
relationships and contracts will depend on our ability to identify, hire and train qualified personnel.

The  Company  is  reliant  on  Meridian  to  collect  payments  from  international  customers,  and  to  remit  the  Company’s  share  of  such  payment  to  the
Company.

Under the terms of the International Promotion Agreement, Meridian is responsible for collecting payments from customers and remitting such
payments to us on a quarterly basis. As a result, we rely on Meridian’s ability to collect and remit payment to us in a timely manner. Meridian could fail to
perform such obligations adequately, cease operations abruptly or become insolvent, or our relationships with Meridian may otherwise change adversely.
Any of the foregoing could adversely impact our business, financial condition and operating results as a result.

If  we  are  unable  to  expand  our  internal  sales  and  marketing  capabilities  or  enter  into  agreements  with  third  parties  with  expertise  in  sales  and
marketing, we may be unable to expand our sales of TPOXX® or other product candidates in the U.S., including to U.S. customers other than the U.S.
Government.

In the United States market, we have retained all sales and marketing rights with respect to oral TPOXX®. In this market, we currently employ a
small, targeted group to support development and business activities related to TPOXX®. We plan to continue our current approach for sales to the U.S.
Government of any other biodefense product candidates that we may successfully develop. This approach may prove insufficient to adequately support our
development and business activities in the United States.

In order to expand our sales of TPOXX® or other product candidates in the U.S., including to U.S. customers other than the U.S. Government, we
may  need  to  enhance  our  own  sales  and  marketing  capabilities,  and/or  enter  into  collaborations  with  third  parties  able  to  perform  these  services  or
outsource these functions to third parties.  There is no assurance that we will be able to do so successfully, and even if we are able to do so that it will have
a significant impact on our growth or profitability.

Although TPOXX® is currently stockpiled by certain governments and not sold commercially, in the future we may be required to perform additional
clinical trials or change the labeling of TPOXX® if we or others identify side effects after we are on the market, which could harm future sales of such
product.

If we or others identify side effects of any approved product, or if manufacturing problems occur:

•

•

•

regulatory approval may be withdrawn;

reformulation of our products, additional clinical trials or other testing or changes in labeling of our products may be required;

changes to or re-approvals of manufacturing facilities used by SIGA may be required;

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•

•

•

sales of the affected products may drop significantly;

our reputation in the marketplace may suffer; and

lawsuits, including class action suits, may be brought against us.

Any  of  the  above  occurrences  could  harm  or  prevent  future  sales  of  the  affected  product  or  could  increase  the  costs  and  expenses  of

commercializing and marketing these products, which could adversely affect our business, financial condition and results of operations.

If  we  sell  TPOXX®  to  non-government  customers  and  are  able  to  charge  such  customers  higher  prices  than  we  charge  to  the  U.S.  Government,
healthcare reform and controls on healthcare spending in the U.S. may nonetheless limit the prices we charge for our products and the amounts that
we can sell.

There have been a number of legislative and regulatory proposals in the United States to change the health care system in ways that could affect
our pricing of TPOXX® to non-government customers. One significant example of recent legislative action is the Inflation Reduction Act of 2022 (the
“IRA”),  which  was  signed  into  law  on  August  16,  2022.  The  IRA,  as  written,  among  other  changes,  gives  HHS  the  ability  and  authority  to  directly
negotiate with manufacturers the price that Medicare will pay for certain high-priced drugs. The IRA also requires manufacturers of certain Part B and Part
D  drugs  to  issue  to  HHS  rebates  based  on  certain  calculations  and  triggers  (i.e.,  when  drug  prices  increase  and  outpace  the  rate  of  inflation).
Implementation of the IRA's drug price negotiation provisions began in 2023, and will continue to be implemented over the next several years. Multiple
pharmaceutical manufacturers have challenged the law in court, largely on constitutional grounds. These suits will continue through 2024 and the ultimate
effects of such legal challenges are unclear. At this time, we continue to evaluate the effect of the IRA on our business operations and financial condition
and results as the full impact of the IRA remains uncertain. In addition, the Patient Protection and Affordable Care Act, as amended by the Health Care and
Education  Reconciliation  Act  of  2010  (collectively,  the  “Healthcare  Reform  Act”),  substantially  changed  the  way  healthcare  is  financed  by  both
governmental and private insurers and had a substantial effect on the pharmaceutical industry. The Healthcare Reform Act contains a number of provisions,
including those governing enrollment in federal healthcare programs like Medicare, reimbursement changes and rules protecting against fraud and abuse,
that  affect  existing  healthcare  programs.  If  we  are  able  to  charge  higher  prices  to  non-government  customers  than  we  charge  to  the  U.S.  Government,
healthcare reform and controls on healthcare spending in the U.S. may nonetheless limit the price we charge for our products and the amounts that we can
sell. For example, some of our revenue may be derived from governmental healthcare programs, including Medicare. Furthermore, beginning in 2011, the
Healthcare Reform Act imposed a non-deductible excise tax on pharmaceutical manufacturers or importers who sell “branded prescription drugs,” which
includes  innovator  drugs  and  biologics  (excluding  orphan  drugs  or  generics)  to  U.S.  Government  programs.  The  Healthcare  Reform  Act  and  other
healthcare reform measures that may be adopted in the future could have an adverse effect on our industry generally, as well as potential future sales and
profitability of our current or future products.

The Company is subject to complex and changing laws and regulations worldwide, which exposes the Company to potential liability, increased cost,
and other adverse effects on the Company’s business.

Some  laws  and  regulations  governing  our  business,  including  the  U.S.  Foreign  Corrupt  Practices  Act  (FCPA)  and  many  other  global  anti-
corruption laws, may hold the Company liable for the actions of our third-party partners.  Although the Company has implemented policies and procedures
designed  to  ensure  compliance  with  applicable  laws  and  regulations,  there  can  be  no  assurance  the  Company’s  employees,  contractors,  third  parties  or
agents will not violate such laws and regulations or the Company’s policies and procedures.

Failure  to  comply  with  such  laws  and  regulations  could  adversely  affect  the  Company’s  business,  reputation,  financial  condition,  or  ability  to
procure government contracts.  Indeed, violations of the FCPA can result in significant civil and criminal penalties that can be levied on the Company and
its executives. Indictment alone under the FCPA can lead to suspension of the right to do business with the U.S. Government until the pending claims are
resolved and conviction under the FCPA can result in long-term disqualification as a government contractor.  The SEC may also suspend or bar issuers
from trading securities on U.S. stock exchanges for violations of the FCPA.

We have incurred in the past, and could incur net losses in the future, including if options are not exercised under the 19C BARDA Contract.

While we believe our current cash position is strong, our ability to continue to fund future operations will be substantially impacted by cash flows
from the 19C BARDA Contract or any new procurement contract with the U.S. Government, which may not be sufficient if the U.S. Government elects, in
its sole discretion, not to exercise or to significantly delay exercise of some or all of the remaining options under the 19C BARDA Contract or any new
procurement contracts. If cash flows from a U.S. Government procurement contract are significantly different from expectations, or if operating expenses
or other expenses meaningfully exceed our expectations or cannot be adjusted accordingly, then our business, financial condition, results of operations and
prospects could be materially adversely affected.

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Risks Related to Manufacturing, Storage and Our Dependence on Third Parties

If  third  parties  on  whom  we  rely  for  manufacturing  and  raw  materials  of  TPOXX®,  and  managing  our  inventory,  do  not  perform  as  contractually
required or as we expect, we may not be able to successfully satisfy our obligations under any contracts, including the 19C BARDA Contract, and our
business would suffer.

We currently rely on third-party manufacturers and service providers to provide raw materials and manufacture, package, test and ship TPOXX®.
Under the 19C BARDA Contract, we are responsible for the performance of these third-party contractors, and our contracts with these third parties give us
certain supervisory and quality control rights, but we do not exercise day-to-day control over their activities.

If a third-party provider fails to comply with applicable laws and regulations, fails to meet expected deadlines, fails to conduct trials in accordance
with  regulatory  requirements  or  our  stated  protocols,  experiences  shortages  or  delays,  or  otherwise  does  not  carry  out  its  contractual  duties  to  us,  or
encounters  physical  damage  or  natural  disaster  or  disruptions  at  its  facilities,  our  ability  to  meet  our  obligations  under  any  contract  including  the  19C
BARDA  Contract  or  to  develop,  obtain  approval  of  and  commercialization  of  other  indications  of  TPOXX®  or  other  drug  candidates,  could  be
significantly impaired or delayed. We do not currently have the internal capacity to perform these important functions, and we may not be able to maintain
commercial arrangements for these services on reasonable terms.

If  third  parties  on  whom  we  rely  for  packaging  and  delivery  of  our  products,  are  unable  to  meet  the  target  timing  for  deliveries  to  our  customers,
product revenue recognition may be delayed and our business could suffer.

Additionally, we rely on third-party providers for storing, packaging and delivering certain of our products, including a portion of the stockpile of
IV  TPOXX®  under  the  19C  BARDA  Contract,  thereby  entrusting  such  vendor  or  vendors  with  the  care  and  handling  of  a  substantial  portion  of  IV
TPOXX® inventory. Relying on third parties for storage, packaging and delivery of our products exposes us to risks, including reduced control over timing
for  delivery  and  quality  assurance.  If  these  third  parties  experience  delays,  capacity  constraints,  quality  control  problems  or  other  disruptions  to  their
operations, including due to supply chain shortages, natural disasters, health emergencies, pandemics, epidemics, civil unrest, labor disputes, cyber events,
trade  disputes,  international  conflicts  or  global  hostilities,  our  ability  to  ship  products  to  our  customers  could  be  impaired  and  we  may  fail  to  meet  our
requirements  for  timely  delivery.  Failure  to  meet  our  scheduled  product  deliveries  to  our  customers  could  cause  the  loss  of  sales,  delayed  revenue
recognition or an increase in our costs, which could adversely affect our business, financial condition and results of operations.

If third parties do not manufacture our drug candidates or products in sufficient quantities and at an acceptable cost or in compliance with regulatory
or contractual requirements and specifications, the fulfillment of contractual requirements under the 19C BARDA Contract, or any other procurement
contract, or the development of our drug candidates could be delayed, prevented or impaired.

If our contract manufacturers are unable to generate enough materials to meet commercial obligations or satisfy clinical needs, the success of drug
products may be jeopardized. Our current and anticipated future dependence upon others for the manufacture of our drug candidates may adversely affect
our ability to develop drug candidates and perform on commercial contracts on a timely and competitive basis. If our third-party manufacturers’ production
processes malfunction or contaminate our drug supplies during manufacturing, we may incur significant inventory loss that may not be covered by our
contractual provisions or insurance policies.

We currently rely on third parties to demonstrate regulatory compliance, for regulatory and science support and for quality assurance with respect
to the drug candidates manufactured for us. We intend to continue to rely on these third parties for these purposes with respect to production of commercial
supplies of drugs that we successfully develop. Manufacturers are subject to ongoing, periodic, unannounced inspection by the FDA and corresponding
state and foreign agencies or their designees to ensure strict compliance with applicable laws and regulations.

We  cannot  be  certain  that  our  present  or  future  manufacturers  will  be  able  to  comply  with  these  regulations  and  other  FDA  regulatory
requirements  or  similar  regulatory  requirements  outside  the  U.S.  Our  government  contracts  and  grants  call  for  compliance  with  all  applicable  legal  and
regulatory requirements, however, we do not control third-party manufacturers and their methods for ensuring adherence to regulatory and legal standards.
If  we  or  these  third  parties  fail  to  comply  with  applicable  regulations,  sanctions  could  be  imposed  on  us  which  could  significantly  delay  and  adversely
affect supplies of our drug candidates.

Problems related to large-scale commercial manufacturing could cause an increase in costs or shortages of products or a delay in product launches.

Manufacturing  API  and  finished  drug  products,  especially  in  large  quantities,  is  complex.  Our  products  require  several  manufacturing  steps  at
multiple  facilities,  and  may  involve  complex  techniques  to  assure  quality  and  sufficient  quantity,  especially  as  the  manufacturing  scale  increases.  Our
products must be made consistently and in compliance with a clearly defined manufacturing process. Accordingly, it is essential to be able to validate and
control the manufacturing process to assure that it is reproducible. Slight deviations anywhere in the manufacturing process, including obtaining materials,
filling, labeling, packaging, storage, shipping, quality control and testing, some of which all pharmaceutical companies, including SIGA, experience from
time to time, may result in lot failures, delay in the release of lots, product recalls or spoilage. Success rates can vary dramatically at different stages of the
manufacturing process, which can lower yields and increase costs. We may experience deviations in the manufacturing process that may take significant
time and resources to resolve and, if unresolved, may affect manufacturing output and/or cause us to fail to satisfy contractual commitments, lead to delays
in  our  clinical  trials  or  result  in  litigation  or  regulatory  action.  Such  actions  would  hinder  our  ability  to  meet  contractual  obligations  and  could  cause
material adverse consequences for our business.

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Risks Related to Product Development

Growth  of  our  business  may  be  impacted  significantly  by  our  success  in  completing  development  and  commercialization  of  drug  candidates,  new
formulations  or  additional  indications  for  TPOXX®.  If  we  are  unable  to  commercialize  new  drug  candidates,  new  formulations,  or  additional
indications, or experience significant delays in doing so, our business may be materially harmed.

We have invested a substantial amount of our efforts and financial resources in the development of our drug candidates. Our ability to generate
near-term cash flows is primarily dependent on the success of our smallpox antiviral drug TPOXX®, which has been approved by the FDA in oral and
intravenous  forms  and  by  select  international  regulatory  agencies  in  the  oral  form.  The  commercial  success  of  our  current  and  future  drug  candidates,
new formulations or additional indications for TPOXX®, will depend on many factors, including:

•

•

•

•

•

•

•

successful development, formulation and cGMP scale-up of drug manufacturing that meets FDA requirements;

successful development of animal models;

successful completion of non-clinical development, including studies in approved animal models;

our ability to pay the expense of filing, prosecuting, defending and enforcing patent claims and other intellectual property rights;

successful completion of clinical trials;

receipt of marketing approvals, including the impact of marketing restrictions or required post-approval clinical studies, from the FDA for liquid
suspension/pediatric formulations of TPOXX® and similar foreign regulatory authorities;

establishing arrangements on reasonable terms with suppliers and contract manufacturers;

• manufacturing stable commercial supplies of drug candidates, including availability of raw materials;

•

•

launching commercial sales of the product, whether alone or in collaboration with others; and

acceptance  of  the  product  by  potential  government  customers,  public  health  experts,  physicians,  patients,  healthcare  payors  and  others  in  the
medical community.

We may rely on FDA regulations known as the “Animal Rule” to obtain approval for most of our biodefense drug candidates. The Animal Rule
permits the use of animal efficacy studies together with human clinical safety trials to support an application for marketing approval. These regulations are
relied  upon  only  occasionally.  It  is  possible  that  results  from  these  animal  efficacy  studies  may  not  be  predictive  of  the  actual  efficacy  of  our  drug
candidates in humans. If we are not successful in completing the development and commercialization of our drug candidates, whether due to our efforts or
due to concerns raised by our governmental regulators or customers, our business could be materially adversely affected.

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We may not be able to fully commercialize the liquid suspension/pediatric formulation of TPOXX®, or other additional indications for TPOXX®, if our
clinical trials do not demonstrate adequate safety or our animal studies do not demonstrate adequate efficacy.

Before obtaining regulatory approval for the sale of our drug candidates, extensive development is required. The goal of development is to use
clinical studies to demonstrate the safety of our drug candidates and animal trials to demonstrate the efficacy of our drug candidates. Clinical trials and
animal  studies,  and  related  work,  are  resource-intensive,  difficult  to  design  and  implement,  can  take  many  years  to  complete  and  are  uncertain  as  to
outcome. Success in pre-clinical testing and early clinical trials does not ensure that later clinical trials or animal efficacy studies will be successful, and
interim results of a clinical trial or animal efficacy study do not necessarily predict final results.

A failure of one or more of our clinical trials or animal efficacy studies can occur at any stage of development. We may experience numerous
unforeseen events during, or as a result of, pre-clinical testing and the clinical trial or animal efficacy study process that could delay or prevent our ability
to receive regulatory approval or commercialize our drug candidates, including:

•

•

•

•

•

•

•

•

•

•

regulators or institutional review boards may not authorize us to commence a clinical trial or conduct a clinical trial at a prospective trial site;

we may decide, or regulators may require us, to conduct additional pre-clinical testing or clinical trials, or we may abandon projects that we expect
to be promising, if our pre-clinical tests, clinical trials or animal efficacy studies produce negative or inconclusive results;

we might have to suspend or terminate our clinical trials if the participants are being exposed to unacceptable health risks;

regulators  or  institutional  review  boards  may  require  that  we  hold,  suspend  or  terminate  clinical  development  for  various  reasons,  including
noncompliance with regulatory requirements;

the resources required to manage and oversee our clinical trials could escalate and become cost prohibitive;

our governmental regulators may impose requirements on clinical trials, pre-clinical trials or animal efficacy studies that we cannot meet or that
may prohibit or limit our ability to perform or complete the necessary testing in order to obtain regulatory approval;

any regulatory approval we ultimately obtain may be limited or subject to restrictions or post-approval commitments that render the product not
commercially viable;

we may not be successful in recruiting a sufficient number of qualifying subjects for our clinical trials; 

the effects of our drug candidates may not be the desired effects or may include undesirable side effects or the drug candidates may have other
unexpected characteristics; or

the required resources, regulations, or challenges associated with animal studies may increase and make our studies more difficult.

Liquid Suspension/Pediatric TPOXX® formulations are currently in product development and there can be no assurance of successful development or
ultimate commercialization.

The fact that the FDA has approved the oral and IV formulations of TPOXX® does not guarantee that our approach to drug development will be
effective or will result in the successful commercialization of the liquid suspension/pediatric formulation of TPOXX®, any new indication such as post-
exposure prophylaxis, of TPOXX® or any other drug. We cannot predict with certainty whether any other drug candidate or expanded indication resulting
from our research and development efforts will be approved by the FDA.

All of our potential drug candidates are prone to the risks of failure inherent in pharmaceutical product development, including the possibility that

our drug candidates will not or cannot:

•

•

•

•

•

•

•

•

be shown to be safe, non-toxic and effective;

otherwise meet applicable regulatory standards;

receive the necessary regulatory approvals;

develop into commercially viable drugs;

be manufactured or produced economically and on a large scale;

be successfully marketed;

be paid for by governmental procurers or be reimbursed by governmental or private insurers; or

achieve customer acceptance.

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In addition, third parties may seek to preclude us from marketing our drugs through enforcement of their proprietary or intellectual property rights that we
are not aware of, or third parties may succeed in marketing equivalent or superior drug products that do not infringe our intellectual property. Our failure to
develop safe, commercially viable future drug candidates or obtain approval for expanded indications and formulations of TPOXX® could have a material
adverse effect on our ability to grow our business, and impair our financial condition and operations.

Risks Related to Our Intellectual Property

Our ability to compete may decrease if we do not adequately protect our intellectual property rights.

Our  commercial  success  will  depend  in  part  on  our  ability  to  obtain  and  maintain  regulatory  exclusivity,  patent  and  other  intellectual  property
protection  for  our  proprietary  technologies,  drug  targets  and  potential  products  and  to  preserve  our  trade  secrets  and  trademark  rights.  Because  of  the
substantial length of time and expense associated with bringing potential products through the development and regulatory clearance processes to reach the
marketplace, the pharmaceutical industry places considerable importance on obtaining regulatory, patent and trade secret protection. The patent positions of
pharmaceutical and biotechnology companies can be highly uncertain and involve complex legal and factual questions. No consistent policy regarding the
breadth of claims allowed in biotechnology patents worldwide has emerged to date. Accordingly, we cannot definitively predict the type and breadth of
claims allowed in patents covering our products.

SIGA exclusively owns its key patent portfolios, which relate to its leading drug product, TPOXX® (also known as ST-246, tecovirimat). As of
January 17, 2024, the TPOXX® patent portfolio has seven patent families consisting of 30 U.S. utility patents, 109 issued foreign patents, two U.S. utility
patent applications, and 16 foreign patent applications. With FDA regulatory approval of oral TPOXX® in July 2018, we were awarded seven years of
regulatory exclusivity by the U.S. Patent and Trademark Office based on orphan drug designation for the product. Such protection is separate from, and in
addition to, our patent and other intellectual property rights and provides for exclusivity to July 2025

We  also  rely  on  trade  secrets,  know-how,  continuing  technological  innovation  and  licensing  opportunities.  In  an  effort  to  maintain  the
confidentiality  and  ownership  of  trade  secrets  and  proprietary  information,  we  require  our  employees,  consultants  and  some  collaborators  to  execute
confidentiality  and  invention  assignment  agreements  upon  commencement  of  a  relationship  with  us.  These  agreements  may  not  provide  meaningful
protection for our trade secrets, confidential information or inventions in the event of unauthorized use or disclosure of such information, and adequate
remedies may not exist in the event of such unauthorized use or disclosure.

If our technologies are alleged or found to infringe the patents or proprietary rights of others, we may be sued, we may have to pay damages or be
barred from pursuing a technology, or we may have to license those rights from and pay royalties to others on unfavorable terms. If we are sued, even
if we prevail, such litigation may be costly.

Our commercial success will depend significantly on our ability to operate without infringing the patents or proprietary rights of third parties. Our
technologies, or the technologies of third parties on which we may depend, may infringe the patents or proprietary rights of others. If there is an adverse
outcome in any dispute concerning rights to these technologies, then we could be subject to significant liability, required to license disputed rights from or
to other parties and/or required to cease using a technology necessary to carry out our research, development and commercialization activities. We do not
currently license any patent rights from third parties relative to TPOXX®.

If our patents are challenged and found to be invalid or unenforceable, the value of our products could be harmed, and we could be subject to

competition earlier than we anticipated.

The costs to establish or defend against claims of infringement or interference with patents or other proprietary rights can be expensive, distracting
and  time-consuming,  even  if  the  outcome  is  favorable.  An  outcome  of  any  patent  or  proprietary  rights  administrative  proceeding  or  litigation  that  is
unfavorable to us may cause us to incur significant costs, and have a material adverse effect on us. Additionally, we may not prevail in any such action and
such litigation often takes years to resolve creating business uncertainty if we are not able to resolve it quickly.

Furthermore, like many biopharmaceutical companies, we may from time to time hire scientific personnel formerly employed by other companies
involved in one or more areas similar to the activities conducted by us. It is possible that we and/or these individuals may be subject to allegations of trade
secret misappropriation or other similar claims as a result of their prior affiliations.

Risks Related to Our Common Stock

Concentration of ownership of our capital stock could delay or prevent a change of control.

Our  directors,  executive  officers  and  beneficial  owners  of  more  than  5%  of  our  common  stock  ("principal  stockholders")  beneficially  own  a
significant  percentage  of  our  common  stock.  As  a  result,  these  stockholders,  if  acting  together,  have  the  ability  to  influence  the  outcome  of  corporate
actions requiring stockholder approval. Additionally, this concentration of ownership may have the effect of delaying or preventing a change of control of
SIGA. As of February 15, 2024, directors, executive officers and principal stockholders (excluding institutional and retail investors) beneficially owned
approximately 35% of our outstanding common stock. In addition to owning common stock of the Company, directors and certain executive officers have
the right to acquire additional stock through the exercise or conversion of certain securities.

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A future issuance of preferred stock may adversely affect the rights of the holders of our common stock.

Our  certificate  of  incorporation  allows  our  Board  of  Directors  (the  "Board")  to  issue  up  to  20,000,000  shares  of  preferred  stock  and  to  fix  the
voting  powers,  designations,  preferences,  rights  and  qualifications,  limitations  or  restrictions  of  these  shares  without  any  further  vote  or  action  by  the
stockholders. The rights of the holders of common stock will be subject to, and could be adversely affected by, the rights of the holders of any preferred
stock that we may issue in the future. The issuance of preferred stock could have the effect of making it more difficult for a third party to acquire a majority
of our outstanding voting stock, thereby delaying, deferring or preventing a change of control.

General Risk Factors

Global  infectious  disease  outbreaks,  such  as  the  COVID-19  pandemic,  or  climate-related  matters  could  negatively  impact  the  global  economy  on  a
broad scale and our business in particular.

The COVID-19 pandemic caused significant societal and economic disruption. The direct and indirect impacts of the pandemic were significant
and broad-based, including supply chain disruptions and labor shortages that started during the pandemic and continue to represent business and financial
risks.    As  such,  the  Company  is  continually  coordinating  with  service  providers  and  vendors,  in  particular  Contract  Manufacturing  Organizations  that
constitute our supply chain, with respect to risks and mitigating actions.

While  the  Company  has  not  identified  or  been  notified  by  government  customers  of  impediments  to  the  continued  full  performance  of  their
government  contracts  in  connection  with  the  COVID-19  pandemic,  future  global  infectious  disease  outbreaks  or  climate-related  matters  could
have material adverse impact on the financial condition of the Company and its long-term operating performance.

Future  acquisitions,  strategic  investments,  partnerships  or  alliances  could  be  difficult  to  identify  and  integrate,  divert  the  attention  of  management,
disrupt  our  business,  dilute  stockholder  value,  materially  change  the  risk  profile  of  the  Company  and/or  adversely  affect  our  operating  results  and
financial condition.

We may in the future seek to acquire or invest in businesses, products or technologies that we believe could complement or expand our services,
enhance our technical capabilities or otherwise offer growth opportunities. The pursuit of potential acquisitions may divert the attention of management and
cause  us  to  incur  various  expenses  in  identifying,  investigating  and  pursuing  businesses.  In  addition,  we  may  not  be  able  to  find  and  identify  desirable
acquisition  targets  or  be  successful  in  entering  into  an  agreement  with  any  particular  target  or  consummating  any  such  agreement.  Even  if  we  do
consummate an acquisition, in connection therewith we may be required to issue equity (thereby diluting our current stockholders) or debt, we may not be
able to integrate successfully the acquired personnel, operations and technologies, or effectively manage the combined business following the acquisition,
or  the  acquired  business  could  otherwise  fail  to  meet  our  expectations,  which,  in  each  case,  could  have  a  material  adverse  effect  on  our  business
projections, financial condition, results of operations and prospects.

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The health security markets in which we compete and will compete are highly competitive.

The health security industry is characterized by rapid and significant technological change. Our success will depend on our ability to develop and
apply  our  technologies  in  the  design  and  development  of  our  product  candidates  and  to  establish  and  maintain  a  market  for  our  product  candidates.  In
addition, there are many companies, both public and private, including major pharmaceutical and chemical companies, specialized biotechnology firms,
universities and other research institutions engaged in developing pharmaceutical, health security and biotechnology products. Many of these companies
have substantially greater financial, technical, research and development resources, and human resources than us. Competitors may develop products or
other technologies that are more effective than any that are being developed by us or may obtain FDA approval for products more rapidly than us. If we
commence commercial sales of products, we still must compete in the manufacturing and marketing of such products, areas in which it is very difficult to
succeed and in which we have limited experience and in which we are partially dependent on third parties. Many potential competitors have manufacturing
facilities and established marketing capabilities that may enable such companies to market competing products through existing channels of distribution
which could provide a substantial advantage.

Product liability lawsuits could cause us to incur liabilities, which could be substantial, and require us to limit commercialization of any products that
we may develop.

Like all pharmaceutical companies, we face an inherent business risk related to the sale of TPOXX® and any other products that we successfully
develop  and  the  testing  of  our  product  candidates  in  clinical  trials.  TPOXX®  is  currently  identified  as  a  covered  countermeasure  under  the  PREP  Act
declaration issued in October 2008, as amended, which provides us with substantial immunity with respect to the manufacture, administration or use of
TPOXX®.  Under  our  BARDA  Contract,  the  U.S.  Government  should  indemnify  us  against  claims  by  third  parties  for  death,  personal  injury  and  other
damages  related  to  TPOXX®,  including  reasonable  litigation  and  settlement  costs,  to  the  extent  that  the  claim  or  loss  results  from  specified  risks  not
covered by insurance or caused by our grossly negligent or criminal behavior. The collection process under the PREP Act can be lengthy and complicated,
and there is no guarantee that we would be able to recover these amounts from the U.S. Government.

If we cannot successfully defend ourselves against future claims that our product or product candidates caused injuries and we are not entitled to
or able to obtain indemnity by the U.S. Government with respect to such claims, or if the U.S. Government does not honor its indemnification obligations,
we may incur liabilities, which could be substantial. Regardless of merit or eventual outcome, product liability claims may result in decreased demand for
any  product  candidate  or  product  that  we  may  develop;  withdrawal  of  a  product  from  the  market;  costs  and  management  time  and  focus  to  defend  the
related litigation; substantial monetary awards to trial participants or patients; loss of revenue; harm to our reputation; the inability to commercialize any
products that we may develop. Additionally, a successful product liability claim or series of claims brought against us could cause our stock price to fall,
could decrease our financial resources and materially exhaust our existing insurance or limit our ability to obtain insurance going forward, all of which
would materially adversely affect our business and financial position.

We currently have product liability insurance with coverage up to a $10 million annual aggregate limit and a $10 million per occurrence limit.
Product liability insurance is difficult to obtain and increasingly expensive. Should we face claims, we may not be able to maintain insurance coverage at a
reasonable cost and we may not be able to maintain or obtain insurance coverage that will be adequate to satisfy any liability that may arise.

Our activities may involve hazardous materials, use of which may subject us to environmental regulatory liabilities.

Our  biopharmaceutical  research  and  development  sometimes  may  involve  the  use  of  hazardous  and  radioactive  materials  and  generation  of
biological waste. We are subject to federal, state and local laws and regulations governing the use, manufacture, storage, handling and disposal of these
materials  and  certain  waste  products,  and  may  have  to  incur  significant  costs  to  comply  with  current  or  future  environmental  laws  and  regulations.
Although we believe that our CMOs’ safety procedures for handling and disposing of these materials comply with legally prescribed standards, the risk of
accidental contamination or injury from these materials cannot be completely eliminated. In the event of an accident, we could be held liable for damages,
and  this  liability  could  exceed  our  resources.  We  use  through  third  parties,  for  example,  small  amounts  of  radioactive  isotopes  commonly  used  in
pharmaceutical  research,  which  are  stored,  used  and  disposed  of  in  accordance  with  Nuclear  Regulatory  Commission  regulations.  Our  general  liability
policy provides coverage up to annual aggregate limits of $2 million and coverage of $1 million per occurrence.

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The loss of key personnel or our ability to recruit or retain qualified personnel could adversely affect our results of operations.

We rely upon the ability, expertise, judgment, discretion, integrity and good faith of our senior management team, including our Chief Executive
Officer,  Chief  Scientific  Officer  and  other  key  executives.  Our  success  is  dependent  upon  our  personnel  and  our  ability  to  recruit,  retain  and  train  high
quality  employees.  We  must  continue  to  recruit,  retain  and  motivate  management  and  other  employees  sufficient  to  maintain  our  current  business  and
support our projected growth. The loss of services of any members of our key management team could have a material adverse effect on our business. The
COVID-19 pandemic increased employment changes in many industries, including ours. We cannot predict with certainty how, if at all, this may impact
SIGA.

On January 17, 2023, we announced that Phillip Gomez had provided notice of his intention to retire as our Chief Executive Officer and a member
of our Board in 2023. On January 26, 2024, Dr. Gomez retired from the Company and on January 27, 2024, Dr. Diem Nguyen commenced her term as
Chief  Executive  Officer.  As  a  general  matter,  the  transition  could  result  in  uncertainty  or  disruption  to  our  business,  which  could  adversely  impact  our
business and results of operations.

Our business and operations would suffer in the event of a significant computer system failure, cyber-attack or deficiency in our cyber-security.

Despite the implementation of security measures, our internal computer systems, and those of third parties on which we rely, we are vulnerable to
damage from computer viruses, malware, natural disasters, terrorism, war, telecommunication and electrical failures, cyber-attacks or cyber-intrusions over
the Internet, phishing attacks, persons inside our organization or persons with access to systems inside our organization. The risk of a security breach or
disruption, particularly through cyber-attacks or cyber-intrusion, including by computer hackers, foreign governments and cyber terrorists, has generally
increased  as  the  number,  intensity  and  sophistication  of  attempted  attacks  and  intrusions  from  around  the  world  have  increased  and  been  targeted  at
pharmaceutical companies in particular. Also, increasing use of artificial intelligence may increase the risk of cyber attacks. If such an event were to occur
and cause interruptions in our operations, it could result in a material disruption of our drug development programs. For example, the loss of clinical trial
data from completed or ongoing or planned clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to
recover or reproduce the data.

Also, our processing of sensitive information may subject us to data privacy and security obligations, and confidential patient and other personal
or sensitive information may be compromised in a cyber-attack or cyber-intrusion. In the United States, federal, state, and local governments have enacted
numerous data privacy and security laws, including data breach notification laws, personal data privacy laws, consumer protection laws and other similar
laws (e.g., wiretapping laws). For example, the Health Insurance Portability and Accountability Act of 1996 imposes specific requirements relating to the
privacy, security and transmission of individually identifiable health information. If we or the third parties on which we rely fail, or are perceived to have
failed, to address or comply with data privacy and security obligations, we could face significant consequences. These consequences may include, but are
not limited to, government enforcement actions, litigation, additional reporting requirements and/or oversight, bans on processing personal data, orders to
destroy or not use personal data and imprisonment of Company officials.

To the extent that any disruption or security breach was to result in a loss of or damage to our data or applications, or inappropriate disclosure of
confidential or proprietary information, we could incur material legal claims and liability, damage to our reputation, and the further development of our
drug candidates could be delayed.

We may need additional funding, which may not be available to us, and which may force us to delay, reduce or limit proposed acquisitions or strategic
investments or any of our non-government funded product development programs or commercial efforts.

Although  we  believe  our  current  cash  position  is  strong,  we  may  require  additional  financing  and,  while  we  have  raised  funds  through  credit
facilities and the issuance of new equity or the exercise of options or warrants in the past, there is no guarantee that we will continue to be successful in
raising such funds should we need to seek to do so. If we are unable to raise additional funds, we could be forced to discontinue, cease or limit certain
strategic transactions or operations and equity investors could experience significant or total losses of their investments. Our cash flows may fall short of
our projections or be delayed, or our expenses may increase, including as a result of inflation or interest rate increases, which could result in our capital
being consumed significantly faster than anticipated. If we are able to obtain additional financing through the sale of equity or convertible debt securities,
such sales may contain terms, such as liquidation and other preferences that are not favorable to us or our stockholders. If we raise additional funds through
collaboration and licensing arrangements with third parties, it may be necessary to relinquish valuable rights to our technologies or product candidates or
grant licenses on terms that may not be favorable to us. Debt financing arrangements, if available, may require us to pledge certain assets or enter into
covenants that could restrict our business activities or our ability to incur further indebtedness and may be at interest rates and contain other terms that are
not favorable to our stockholders.

The cash and cash equivalents that we use to meet our cash needs, including working capital and operating expenses, are held in deposit or investment
accounts at four financial institutions. If one or multiple financial institutions fail, our deposit or investment accounts could be adversely affected due
to the loss of or delay in obtaining access to all or a portion of our uninsured funds.

The  cash  and  cash  equivalents  that  we  use  to  meet  our  cash  needs,  including  working  capital  and  operating  expenses,  are  held  in  deposit  or
investment  accounts  at  four  financial  institutions.  The  balance  held  in  these  accounts  regularly  exceeds  the  Federal  Deposit  Insurance  Corporation
(“FDIC”),  standard  deposit  insurance  limit  or  similar  government  guarantee  schemes,  or  in  the  case  of  investment  accounts,  is  not  insured.  If  one  or
multiple financial institutions in which we hold such funds fails or is subject to significant adverse conditions in the financial or credit markets, we could be
subject to a risk of loss of all or a portion of such uninsured funds or be subject to a delay in accessing all or a portion of such uninsured funds. Any such
loss or lack of access to these funds could adversely impact our short-term liquidity and ability to meet our operating expense obligations.

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Item 1B. Unresolved Staff Comments

None.

Item 1C. Cybersecurity

Risk Management and Strategy

We regularly assess risks from cybersecurity threats; monitor our information systems for potential vulnerabilities; and test those systems pursuant
to our information technology policies, processes, and practices, which are integrated into our overall risk management program. To protect our information
systems from cybersecurity threats, we use various security tools that are designed to help identify, escalate, investigate, resolve, and recover from security
incidents in a timely manner. The Company’s Chief Information Officer is responsible for developing and implementing our information security program
and reporting on cybersecurity matters to the Board. Our Chief Information Officer has over a decade of experience leading cybersecurity oversight, and
others  on  our  IT  security  team  have  cybersecurity  experience  or  certifications.  We  view  cybersecurity  as  a  shared  responsibility,  and  we  periodically
perform simulations and tabletop exercises at a management level and engage external resources and advisors as needed. All employees are required to
complete cybersecurity trainings each month through online trainings and simulations.

We collaborate with third parties to assess the effectiveness of our cybersecurity prevention and response systems and processes. These include
cybersecurity  assessors,  consultants,  and  other  external  cybersecurity  experts  to  assist  in  the  identification,  verification,  and  validation  of  cybersecurity
risks, as well as to support associated mitigation plans when necessary. We have also developed a third-party cybersecurity risk management process to
conduct due diligence on external entities, including those that perform cybersecurity services.

Cybersecurity threats, including those resulting from any previous cybersecurity incidents, have not materially affected our Company, including
our business strategy, results of operations, or financial condition. We do not believe that cybersecurity threats resulting from any previous cybersecurity
incidents of which we are aware are reasonably likely to materially affect our Company. For more information about the cybersecurity risks we face, see
the risk factor entitled “Our business and operations would suffer in the event of a significant computer system failure, cyber-attack or deficiency in our
cyber-security” in Item 1A- Risk Factors.

Governance

The full Board receives updates periodically or as needed during the year from the Company’s Chief Information Officer and actively participates
in discussions with management and amongst themselves regarding cybersecurity risks. Updates delivered to the full Board typically include discussion of
management’s actions to identify and detect threats, as well as planned actions in the event of a response or recovery situation. These updates also typically
include  a  review  of  any  recent  enhancements  to  the  Company’s  defenses  and  management’s  progress  on  its  cybersecurity,  as  well  as  reports  on  key
performance indicators, test results and related remediation, and recent threats and how the Company is managing those threats.

Item 2. Properties

Our headquarters are located in New York, NY, and our research and development facilities are located in Corvallis, Oregon. In May 2017, we
entered into a new 10-year lease with a related party to let 3,200 square feet in New York, NY to serve as our corporate headquarters. For more information
about the lease, see Note 13. Related Party Transactions, to the consolidated financial statements.

In Corvallis, we lease approximately 10,276 square feet. Until its expiration on December 31, 2017, this facility was leased under an amended
lease agreement signed in January 2007, and most recently changed through an addendum in April 2015. On November 3, 2017 we entered into a new lease
for  the  same  space  which  was  scheduled  to  expire  in  December  2019.  In  the  second  quarter  of  2019,  we  exercised  the  first  renewal  option  which  was
scheduled to expire in December 2021. In the second quarter of 2021, we exercised the second renewal option, which extended the lease expiration date to
December 31, 2024.

Item 3. 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.

Item 4. Mine Safety Disclosures

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

The Company's common stock trades on The Nasdaq Global Market under the symbol "SIGA."

There were 40 holders of record as of February 15, 2024. We believe that the number of beneficial owners of our common stock is substantially

greater than the number of record holders, because a large portion of common stock is held in broker “street names.”

On May 4, 2023, the Board declared a special dividend of $0.45 per share on the common stock of the Company. The special dividend was paid
on June 1, 2023 to shareholders of record at the close of business on May 16, 2023. On March 12, 2024, the Board declared a special dividend of $0.60 per
share on the common stock of the Company, payable on April 11, 2024 to shareholders of record at the close of business on March 26, 2024. Any future
payments  of  dividends  on  our  common  stock  will  be  determined  by  our  Board  and  will  depend  on  our  business  conditions,  financial  results  and  other
factors our Board deems relevant.

Issuer Purchases of Equity Securities

Period
October 1, 2023 to October 31, 2023
November 1, 2023 to November 30, 2023
December 1, 2023 to December 31, 2023
Total

Total Number
of Shares
Purchased

Average Price
Paid per Share    

-    $
-     
-     
-    $

-     
-     
-     
-     

Total Number
of Shares
Purchased as
Part of
Publicly
Announced
Programs

Dollar Value
of Shares That
May Yet Be
Purchased
Under the
Programs
21,498,370 
21,498,370 
21,498,370 

-    $
-     
-     
-     

On August 5, 2021, the Company announced that the Board of Directors authorized a share repurchase program under which the Company may
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. The timing and actual number of shares repurchased under any authorization of this type depends on a variety of factors,
including: the timing of exercise of procurement options under government contracts; alternative opportunities for strategic uses of cash; the stock price of
the  Company’s  common  stock;  market  conditions;  and  other  corporate  liquidity  requirements  and  priorities.  On  December  31,  2023,  the  remaining
repurchase authorization for approximately $21 million expired.

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Performance Graph

The following line graph compares the cumulative total stockholder return through December 31, 2023, assuming reinvestment of dividends, by
an investor who invested $100 on December 31, 2018 in each of (i) our common stock; (ii) the Nasdaq Composite; and (iii) the Nasdaq Biotech Composite.

SIGA Technologies, Inc.
NASDAQ Composite Index
NASDAQ Biotech Composite Index

  $
  $
  $

100    $
100    $
100    $

60    $
135    $
124    $

92    $
194    $
156    $

95    $
236    $
155    $

99    $
158    $
138    $

81 
226 
144 

2018

2019

2020

2021

2022

2023

Securities Authorized for Issuance Under Equity Compensation Plans

The  information  required  by  this  item  concerning  securities  authorized  for  issuance  under  equity  compensation  plans  is  set  forth  in  Item  12,

“Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.”

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Item 6. [Reserved]

Not applicable.

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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, 2022 (filed with the SEC on March 2, 2023) for
additional discussion of our financial condition and results of operations for the year ended December 31, 2022, as well as our financial condition and
results  of  operations  for  the  year  ended  December  31,  2022  compared  to  the  year  ended  December  31,  2021.  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"  in  certain  international  markets),  to  the  U.S.  Government  and  international  governments
(including  government  affiliated  entities).  Additionally,  the  Company  sells  the  intravenous  formulation  of  TPOXX®  ("IV  TPOXX®")  to  the  U.S.
Government.

TPOXX® is an oral formulation 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.

In connection with IV TPOXX®, SIGA announced on May 19, 2022 that the FDA approved this formulation for the treatment of smallpox. 

In addition to being approved by the FDA, oral TPOXX® (tecovirimat) has regulatory approval with the European Medicines Agency ("EMA"),
Health Canada and the Medicines and Healthcare Products Regulatory Agency ("MHRA") of the United Kingdom. The EMA and MHRA approved label
indication  covers  the  treatment  of  smallpox,  monkeypox  ("mpox"),  cowpox,  and  vaccinia  complications  following  vaccination  against  smallpox.  The
Health Canada approved label indication covers the treatment of smallpox.

With  respect  to  the  regulatory  approvals  by  the  EMA,  MHRA  and  Health  Canada,  oral  tecovirimat  represents  the  same  formulation  that  was

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 completed an immunogenicity trial and an expanded safety trial in early 2023. The nature and timing of a 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  the  trials;  the
Company is currently targeting a Supplemental NDA filing in 2024.

In connection with the 2022 global response to an 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. As of December 31, 2023, there were five randomized, placebo-controlled
clinical trials enrolling patients, when available, in locations including the United States, United Kingdom, the Democratic Republic of Congo ("DRC"),
South America and Europe. These randomized clinical trials are enrolling patients to collect data on the potential benefits of using TPOXX® as an antiviral
treatment for active mpox disease. 

The Company may be able to use data from the trials noted above, as well as from other trials, to potentially pursue an FDA label expansion of
oral TPOXX® for an indication covering the treatment of mpox. The viability, and timing, of a potential FDA submission for an mpox indication will be
impacted by a series of factors, including the magnitude and severity of future mpox cases, the location of future cases, enrollment in clinical trials, and
results of randomized, placebo-controlled and observational clinical trials.

Recent Developments

● On January 27, 2024, Dr. Diem Nguyen commenced her employment as our new Chief Executive Officer and was appointed to the Board.

● During January and February of 2024, the Company delivered a total of approximately $7 million of oral TPOXX® to six countries in

Europe pursuant to the $18 million firm commitment order announced in October 2023, as well as a total of approximately $15 million of
oral TPOXX® to the U.S. Strategic National Stockpile.

● On March 12, 2024, the Board declared a special dividend of $0.60 per share on the common stock of the Company. The special dividend is

payable on April 11, 2024 to shareholders of record at the close of business on March 26, 2024.

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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®, and procurement activities. As of December 31, 2023, 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 $407.1 million of payments are related to exercised options and up to approximately $143.7
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, 2023, 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, $4.3 million for the delivery of IV FDP to the Strategic Stockpile and $22.1 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 will be recognized as IV FDP containing such IV BDS is delivered to and accepted by the
Strategic Stockpile.

The  options  that  have  been  exercised  to  date  provide  for  payments  up  to  approximately  $407.1  million.  There  are  exercised  options  for  the
following activities: payments up to $337.7 million for the manufacture and delivery of up to 1.1 million courses of oral TPOXX®; payments up to $51.2
million for the manufacture of courses of IV FDP, of which $20.4 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,  2023,  the  Company  has  cumulatively  delivered  $323.0  million  of  oral
TPOXX® to the Strategic Stockpile, of which $97.9 million was delivered in the fourth quarter of 2023; has cumulatively received $20.5 million for the
completed manufacture of IV BDS, of which $20.5 million has been recorded as deferred revenue as of December 31, 2023; and has been cumulatively
reimbursed $7.9 million in connection with post-marketing activities for oral and IV TPOXX®. In the first two months of 2024 ended February 29, 2024,
approximately $15 million of oral TPOXX® was delivered to the Strategic Stockpile.

Unexercised  options  specify  potential  payments  up  to  approximately  $143.7  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. There are options for the following activities:
payments of up to $112.5 million for the delivery of oral TPOXX® to the Strategic Stockpile; and 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 to only 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. 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%.

Under the terms of this contract, exercise of procurement options is at the sole discretion of BARDA. The request for proposal that preceded the
award of the 19C BARDA Contract indicated that the expected purpose of the contract was to maintain the level of smallpox antiviral preparedness in the
Strategic  Stockpile.  Based  on  prior  product  delivery  activity,  and  current  FDA-approved  shelf  life  of  oral  TPOXX®,  the  Company  estimates  that  the
remaining options under the 19C BARDA Contract for 363,000 courses of oral TPOXX® (value of $112.5 million) and 32,000 courses of IV FDP (value
of $25.6 million) would need to be exercised in 2024 in order to approximately maintain historical stockpile levels of unexpired TPOXX® treatment in the
Strategic Stockpile.     

U.S. Department of Defense Procurement Contracts

On May 12, 2022, the Company announced a contract with the U.S. Department of Defense ("DoD") for the procurement of oral TPOXX® ("DoD
Contract #1").  The DoD Contract #1 included a firm commitment for the DoD to procure approximately $3.6 million of oral TPOXX®, and an option,
exercisable at the sole discretion of the DoD, for the procurement of an additional approximately $3.8 million of oral TPOXX®.  In the second quarter of
2022, the Company delivered oral TPOXX® to the DoD and recognized revenue of $3.6 million, fulfilling the firm commitment in DoD Contract #1. In the
third quarter of 2022, the DoD exercised the option for $3.8 million of oral TPOXX® and the Company satisfied its obligation by delivering product in
September 2022 and recognized the related revenue. 

On September 28, 2022, the Company and the DoD signed a new procurement contract ("DoD Contract #2"). The DoD Contract #2 included a
firm commitment for the DoD to procure approximately $5.1 million of oral TPOXX®, and an option, exercisable at the sole discretion of the DoD for the
procurement of an additional approximately $5.5 million of oral TPOXX®. 

In  March  2023,  the  Company  fulfilled  the  firm  commitment  by  delivering  $5.1  million  of  oral  TPOXX®  to  the  DoD,  and  recognized  the
related revenue.  Additionally, in March 2023 the DoD exercised the $5.5 million option in DoD Contract #2 for the procurement of oral TPOXX® and the
Company delivered these courses to the DoD in the fourth quarter of 2023.

In February 2024, DoD Contract #2 was amended and approximately $1 million of oral TPOXX® was ordered by the DoD.

International Procurement Contracts

In 2023, the Company has 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. In the first two months of 2024 ending February 29, 2024, the Company delivered an additional
approximately  $7  million  of  oral  TPOXX®  to  six  countries  in  Europe,  completing  greater  than  95%  of  deliveries  under  the  $18  million  of  firm
commitment  orders  from  13  countries  under  the  European  Commission’s  DG  HERA  (Health  Emergency  Preparedness  and  Response  Authority)  joint
procurement  mechanism,  which  was  announced  by  the  Company  in  October  2022.  Additionally,  $0.7  million  of  oral  TPOXX®  was  delivered  to  the
Canada  Department  of  National  Defence  ("CDND")  in  February  2024.  These  deliveries  were  made  in  connection  with  orders  and  contracts  under  the
International Promotion Agreement (defined and discussed below). Through the International Promotion Agreement, Meridian Medical Technologies, Inc.
("Meridian") is the counterparty to international contracts under which orders are placed for the purchase of oral TPOXX®. 

In addition to the above-mentioned orders and deliveries, the Company has a contract with the CDND under which the CDND has an option until
December 31, 2025, exercisable at its sole discretion, for the purchase of up to an additional $6.7 million of oral TPOXX®. As an international contract,
this contract is also administered under the International Promotion Agreement. The contract with the CDND (the "Canadian Military Contract"), issued in
April of 2020 and subsequently amended, is option-based and initially specified that the CDND would purchase up to $14 million of oral TPOXX® if all
options were exercised. 

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International Promotion Agreement

Under the terms of the International Promotion Agreement, as amended, which has an initial term that expires on May 31, 2024, Meridian was
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 has agreed not to commercialize any competing product,
as  defined  in  the  International  Promotion  Agreement,  in  the  specified  field  of  use  in  the  Territory.  SIGA  retains  ownership,  intellectual  property,
distribution  and  supply  rights  and  regulatory  responsibilities  in  connection  with  TPOXX®,  and,  in  the  United  States  market,  also  retains  sales  and
marketing rights with respect to oral TPOXX®. SIGA’s consent is required for the entry into any sales arrangement pursuant to the International Promotion
Agreement.

Sales to international customers pursuant to the International Promotion Agreement are invoiced and collected by Meridian, and such collections
are remitted, less Meridian's fees, to the Company under a quarterly process specified in the International Promotion Agreement. The fee Meridian retains
pursuant to the International Promotion Agreement is 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  are  less  than  or  equal  to  a  specified  threshold,  and  a  higher  specified
percentage of such collected net proceeds for calendar years in which such net collected amounts exceed the specified threshold. We exceeded the specified
threshold  in  2022  and  therefore  recorded  the  higher  specified  percentage  for  all  International  Promotion  Agreement  sales  in  2022.  Taking  into  account
Meridian’s fee and manufacturing costs of oral TPOXX®, it is currently estimated by the Company that international sales of oral TPOXX® each year will
have a contribution margin (as expressed as a percentage of product sales, and before any consideration of expenses not directly related to manufacturing or
Meridian  activities)  of  between  approximately  65%  and  80%,  depending  on  the  international  sales  levels  each  year.  For  purposes  of  this  disclosure,
contribution margin (in amount) represents international product sales less applicable cost of sales and the Meridian fee (which is included within selling,
general and administrative expenses within the income statement).

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. As of December 31, 2023, 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.

Critical Accounting Estimates

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 estimates include revenue recognition over time,
and income taxes (including realization of deferred tax assets).

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.

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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.

Income Taxes

Our income tax expense and deferred tax assets and liabilities reflect management’s best estimate of current and future taxes to be paid. We are
subject to U.S. federal income tax and state income tax in numerous jurisdictions. Significant judgments and estimates are required in the determination of
our income tax expense.

Deferred income taxes arise from temporary differences between the tax basis of assets and their reported amounts in the financial statements,
which will result in taxable or deductible amounts in the future. Each reporting period, we assess the realizability of our deferred tax assets to determine if
the  deductible  temporary  differences  will  be  utilized  on  a  more-likely-than-not  basis.  In  making  this  determination,  we  assess  all  available  positive  and
negative evidence to determine if our existing deferred tax assets are realizable on a more-likely-than-not basis. Significant weight is given to positive and
negative evidence that is objectively verifiable. We consider the reversal of existing taxable temporary differences, projected future taxable income, tax
planning strategies and recent financial operating results. 

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The  amount  of  deferred  tax  assets  considered  realizable,  however,  could  be  adjusted  if  estimates  of  future  taxable  income  change  and/or  if
significant objective negative evidence is no longer present or if significant negative evidence becomes available. Such changes could lead to a change in
judgment related to the realization of the net deferred tax asset. Future changes in the estimated amount of deferred taxes expected to be realized will be
reflected in our financial statements in the period the estimate is changed with a corresponding adjustment to operating results.

Income tax benefits are recognized for a tax position when, in management’s judgment, it is more likely than not that the position will be sustained
upon  examination  by  a  taxing  authority.  For  a  tax  position  that  meets  the  more-likely-than-not  recognition  threshold,  the  tax  benefit  is  measured  as  the
largest amount that is judged to have a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority. We have recorded a
liability for unrecognized tax benefits resulting from tax positions taken, or expected to be taken, in an income tax return. It is the Company’s policy to
recognize interest and penalties related to uncertain tax positions as a component of income tax expense. Uncertain tax positions are evaluated and adjusted
as appropriate, while taking into account the progress of audits of various taxing jurisdictions.

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, 2023 and 2022

Revenues from product sales and supportive services for the years ended December 31, 2023 and 2022 were $130.7 million and $86.7 million,
respectively. 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. Such
revenues for the year ended December 31, 2022 include $71.0 million related to international sales of oral TPOXX®; $7.5 million of oral TPOXX® sales
to the DoD; and approximately $7.2 million of sales of IV TPOXX® to the U.S. Government under the 19C BARDA Contract.

Revenues  from  research  and  development  activities  for  the  years  ended  December  31,  2023  and  2022,  were  $9.2  million  and  $24.1  million,
respectively.  These  revenues  are  mostly  earned  in  connection  with  performance  of  research  and  development  activities  under  the  PEP  Label  Expansion
R&D Contract and 19C BARDA Contract. The decrease of $14.9 million of revenue is primarily related to a decrease in clinical trial activity.

Cost of sales and supportive services for the years ended December 31, 2023 and 2022 were $17.8 million and $10.4 million, respectively. Such
costs  in  2023  were  primarily  associated  with  increases  in  the  manufacture  and  delivery  of  oral  TPOXX®  courses  to  the  U.S.  Government  and  various
international countries. Such costs in 2022 were primarily associated with the manufacture and delivery of oral TPOXX® courses to various international
countries and approximately $4.4 million of costs for the manufacture and delivery of IV TPOXX®.

Selling, general and administrative expenses for the years ended December 31, 2023 and 2022 were $22.0 million and $35.1 million, respectively.
The decrease of $13.1 million mostly reflects a decrease in promotion fees to Meridian as international sales decreased from approximately $71 million in
2022 (in response to the mpox outbreak) to approximately $21 million in 2023, partially offset by higher professional fees.

Research and development expenses were $16.4 million for the year ended December 31, 2023, a decrease of approximately $6.1 million from
the $22.5 million incurred during the year ended December 31, 2022. The decrease is mostly attributable to lower direct vendor-related expenses incurred
in connection with clinical activity, partially offset by an increase in regulatory costs associated with EMA regulatory submissions and related activities.

Changes in the fair value of the liability classified warrant to acquire common stock were recorded within the income statement. The warrant was
fully exercised during the year ended December 31, 2022. For the year ended December 31, 2023, we recorded no activity. For the year ended December
31, 2022, we recorded a gain of approximately $0.4 million, reflecting a decrease in the fair value of the liability-classified warrant primarily due to the
decrease in our stock price.  

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Other income, net for the years ended December 31, 2023 and 2022 was $4.2 million and $1.0 million, respectively. The increase relates to interest

income earned on cash and cash equivalents at rates that are substantially higher in 2023 in comparison to 2022. 

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), shortfalls on stock-based compensation, and state and local taxes.

For the year ended December 31, 2022, we recognized a tax provision of $10.2 million on pre-tax income of $44.1 million. Our effective tax rate
for the year ended December 31, 2022 was 23.2% 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, 2023, we had $150.1 million in cash and cash equivalents, compared with $98.8 million at December 31, 2022. 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, 2023 and 2022 was $94.8 million and $41.6 million, respectively.  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.  For  the  year  ended  December  31,  2022,  the
receipt of approximately $80 million for the product delivery and acceptance of oral TPOXX® courses delivered to the Strategic Stockpile in December
2021, as well as the receipt of approximately $27 million in connection with 2022 product deliveries and advance payments were partially offset by the
payment  of  $31  million  of  federal  and  state  income  taxes;  an  increase  in  inventory  investment  in  connection  with  broadening  of  the  customer  base  for
TPOXX® and mitigation of increasing general supply chain risks; and costs in relation to customary operating activities.

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On December 31, 2023 and 2022, our accounts receivable balance was approximately $21.1 million (which includes approximately $10.3 million
of unbilled receivables) and $45.4 million, respectively. Our accounts receivable balance as of December 31, 2023 primarily reflects 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 are expected to be collected during the first or second
quarter of 2024. Our accounts receivable balance as of December 31, 2022 primarily reflected sales of oral TPOXX® to various international countries, of
which approximately $35 million was received by the Company in February 2023. The remaining amounts of the receivable balance were collected during
the second quarter of 2023.

Investing Activities

We used $21,686 for capital expenditures for the year ended December 31, 2023. For the year ended December 31, 2022, there were no cash-

related activities.

Financing Activities

Cash used in financing activities for the years ended December 31, 2023 and 2022 was $43.4 million and $46.0 million, respectively. 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.  For  the  year  ended  December  31,  2022,  we  paid  a  special  dividend  of  approximately  $32.9  million.  In
addition, we purchased approximately 1.8 million shares of common stock for approximately $13.0 million.

Future Cash Requirements

As  of  December  31,  2023,  we  have  outstanding  purchase  orders  associated  with  manufacturing  obligations  in  the  aggregate  amount  of

approximately $14.8 million.

On March 12, 2024, the Board of Directors declared a special dividend of $0.60 per share on the common stock of the Company. The special

dividend is payable on April 11, 2024 to shareholders of record at the close of business on March 26, 2024.

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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)

Consolidated Balance Sheets

Consolidated Statements of Operations and Comprehensive Income

Consolidated Statements of Changes in Stockholders’ Equity

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

43

44

46

47

48

49

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Report of Independent Registered Public Accounting Firm

To the Board 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, 2023
and 2022, 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, 2023, 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, 2023, 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, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023 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, 2023, 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 Matter

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 $139.9 million for the year ended December 31, 2023. 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, 2023.

/s/ PricewaterhouseCoopers LLP

Florham Park, New Jersey
March 12, 2024

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

Cash and cash equivalents
Accounts receivable
Inventory
Prepaid expenses and other current assets

Total current assets

Property, plant and equipment, net
Deferred tax asset, net
Goodwill
Other assets

Total assets

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities

Accounts payable
Accrued expenses and other current liabilities
Deferred IV TPOXX® revenue
Income tax payable

Total current liabilities

Other liabilities

Total liabilities

Commitments and contingencies (Note 12)
Stockholders' equity

Common stock ($.0001 par value, 600,000,000 shares authorized, 71,091,616 and 72,675,190 issued
and outstanding at December 31, 2023 and December 31, 2022, respectively)
Additional paid-in capital
Accumulated deficit

Total stockholders' equity
Total liabilities and stockholders' equity

  December 31, 2023   

December 31,
2022

  $

  $

  $

  $

150,145,844    $
21,130,951     
64,218,337     
3,496,028     
238,991,160     

1,331,708     
11,048,118     
898,334     
2,083,535     
254,352,855    $

1,456,316    $
10,181,810     
20,788,720     
21,690,899     
54,117,745     
3,376,203     
57,493,948     

98,790,622 
45,406,960 
39,273,090 
2,315,672 
185,786,344 

1,848,314 
6,250,385 
898,334 
252,546 
195,035,923 

3,355,268 
6,304,061 
10,548,720 
1,309,672 
21,517,721 
3,358,160 
24,875,881 

7,109     
235,795,420     
(38,943,622)    
196,858,907     
254,352,855    $

7,268 
233,957,767 
(63,804,993)
170,160,042 
195,035,923 

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

Product sales and supportive services
Research and development

Total revenues

Operating expenses

Cost of sales and supportive services
Selling, general and administrative
Research and development
Total operating expenses
Operating income

Gain from change in fair value of warrant liability
Other income, net

Income before income taxes

Provision for income taxes

Net and comprehensive income

Basic earnings per share
Diluted earnings per share
Weighted average shares outstanding: basic
Weighted average shares outstanding: diluted

2023

2022

2021

  $

130,668,209    $
9,249,011     
139,917,220     

86,661,583    $
24,114,027     
110,775,610     

126,802,536 
6,867,918 
133,670,454 

17,825,090     
22,043,023     
16,427,942     
56,296,055     
83,621,165     
—     
4,155,508     
87,776,673     
(19,707,847)    
68,068,826    $
0.95    $
0.95    $
71,362,209     
71,679,270     

10,432,561     
35,117,241     
22,525,642     
68,075,444     
42,700,166     
400,663     
1,031,903     
44,132,732     
(10,227,926)    
33,904,806    $
0.46    $
0.46    $
72,929,550     
73,546,501     

16,601,880 
18,033,581 
9,942,194 
44,577,655 
89,092,799 
117,770 
101,172 
89,311,741 
(19,860,975)
69,450,766 
0.92 
0.91 
75,322,194 
76,402,716 

  $
  $
  $

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, 2023, 2022 and 2021

Common Stock

Shares

    Amount

    Additional      
Paid-In
Capital

    Accumulated      
Other
    Accumulated    Comprehensive    Stockholders’ 
    Income (Loss)    

Equity

Deficit

Total

Balances, December 31, 2020
Net income
Repurchase of common stock
Issuance of common stock upon vesting of RSUs    
Payment of common stock tendered for employee
stock-based compensation tax obligations
Stock-based compensation
Balances, December 31, 2021
Net income
Repurchase of common stock
Issuance of common stock upon vesting of RSUs    
Issuance of common stock upon exercise of
warrants
Payment of common stock tendered for employee
stock-based compensation tax obligations
Cash dividend ($0.45 per share)
Stock-based compensation
Balances, December 31, 2022
Net income
Issuance of common stock upon exercise of stock
options
Repurchase of common stock (including excise
tax)
Issuance of common stock upon vesting of RSUs    
Payment of common stock tendered for employee
stock-based compensation tax obligations
Cash dividend ($0.45 per share)
Stock-based compensation
Balances, December 31, 2023

    77,195,704    $

7,720    $ 224,978,430    $ (95,192,881)   $
      69,450,766     
      (26,021,140)    

(3,787,683)    
162,876     

(379)    
16     

(27,295)    

(3)    

(16)    

(173,915)    
1,265,809     

    73,543,602    $

7,354    $ 226,070,308    $ (51,763,255)   $
      33,904,806     
      (13,006,149)    

(1,823,738)    
132,396     

(182)    
13     

(13)    

824,903     

83     

6,120,695     

(1,973)    

(12,533)    

    72,675,190    $

      (32,940,395)    

1,779,310     

7,268    $ 233,957,767    $ (63,804,993)   $
      68,068,826     

8,672     

(1,736,822)    
144,576     

(174)    
15     

      (11,072,337)    

(15)    

(214,794)    

    71,091,616    $

      (32,135,118)    

2,052,462     

7,109    $ 235,795,420    $ (38,943,622)   $

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

48

—    $ 129,793,269 
69,450,766 
(26,021,519)
— 

(173,918)
1,265,809 
—    $ 174,314,407 
33,904,806 
(13,006,331)
— 

6,120,778 

(12,533)
(32,940,395)
1,779,310 
—    $ 170,160,042 
68,068,826 

— 

(11,072,511)
— 

(214,794)
(32,135,118)
2,052,462 
—    $ 196,858,907 

 
 
 
 
   
 
     
 
     
 
     
 
 
 
 
   
 
     
 
 
   
   
 
 
 
   
 
 
   
   
 
   
      
     
     
   
     
     
     
   
     
     
   
      
     
     
     
   
      
     
     
   
     
     
     
   
     
     
   
     
     
     
   
      
     
     
   
      
     
     
     
   
      
     
     
   
     
     
     
     
   
     
     
     
   
      
     
     
     
   
      
     
     
   
      
     
     
     
 
 
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SIGA TECHNOLOGIES, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31

Cash flows from operating activities:
Net income

  $
Adjustments to reconcile net income to net cash provided by operating activities:      

Depreciation and other amortization
Gain on change in fair value of warrant liability
Stock-based compensation
Write down of inventory, net
Deferred income taxes (benefit) provision

Changes in assets and liabilities:

Accounts receivable
Inventory
Prepaid expenses and other assets
Accounts payable, accrued expenses and other liabilities
Income tax payable
Deferred IV TPOXX® revenue

Net cash provided by operating activities

Cash flows from investing activities:

Capital expenditures

Cash used in investing activities

Cash flows from financing activities:

Payment of employee tax obligations for common stock tendered
Repurchase of common stock
Payment of dividend

Cash used in financing activities

Net increase/(decrease) in cash and cash equivalents
Cash and cash equivalents at the beginning of period
Cash and cash equivalents at end of period

Supplemental disclosure of cash flows information:
Non-cash lease right-of-use asset and associated liability
Conversion of warrant to common stock
Issuance of common stock upon cashless exercise
Cash income taxes paid, net

  $

  $
  $
  $
  $

2023

2022

2021

68,068,826    $

33,904,806    $

69,450,766 

538,293     
—     
2,052,462     
579,239     
(4,797,733)    

24,276,009     
(25,524,485)    
(3,011,346)    
1,996,838     
20,381,228     
10,240,000     
94,799,331     

(21,686)    
(21,686)    

(214,794)    
(11,072,511)    
(32,135,118)    
(43,422,423)    
51,355,222     
98,790,622     
150,145,844    $

517,643     
(400,663)    
1,779,310     
201,472     
(3,827,778)    

38,243,490     
(19,964,183)    
171,811     
1,533,804     
(17,897,370)    
7,348,720     
41,611,062     

522,368 
(117,770)
1,265,809 
618,771 
121,446 

(80,310,187)
136,369 
48,963 
1,470,614 
18,287,487 
— 
11,494,636 

—     
—     

(50,620)
(50,620)

(12,533)    
(13,006,331)    
(32,940,395)    
(45,959,259)    
(4,348,197)    
103,138,819     
98,790,622    $

(173,918)
(26,021,519)
— 
(26,195,437)
(14,751,421)
117,890,240 
103,138,819 

—    $
—    $
87,540    $
3,500,873    $

—    $
6,120,778    $
—    $
31,372,881    $

733,715 
— 
— 
1,063,744 

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
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"  in  certain  international  markets),  to  the  U.S.  government  and  international  governments
(including  government  affiliated  entities).  Additionally,  the  Company  sells  the  intravenous  formulation  of  TPOXX®  ("IV  TPOXX®")  to  the  U.S.
government.

TPOXX® is an oral formulation 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.

In connection with IV TPOXX®, SIGA announced on May 19, 2022 that the FDA approved this formulation for the treatment of smallpox. 

In addition to being approved by the FDA, oral TPOXX® (tecovirimat) has regulatory approval with the European Medicines Agency ("EMA"), Health
Canada  and  the  Medicines  and  Healthcare  Products  Regulatory  Agency  ("MHRA")  of  the  United  Kingdom.  The  EMA  and  MHRA  approved  label
indication  covers  the  treatment  of  smallpox,  monkeypox  ("mpox"),  cowpox,  and  vaccinia  complications  following  vaccination  against  smallpox.  The
Health Canada approved label indication covers the treatment of smallpox.

With respect to the regulatory approvals by the EMA, MHRA and Health Canada, oral tecovirimat represents the same formulation that was 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 include the variables
used  in  the  calculation  of  reported  amounts  of  revenue  recognized  over  time,  and  the  valuation  of  deferred  tax  assets.  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 all receivables from international government sales is coordinated through the International Promotion Agreement with 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,  2023  and  2022,  53%  and  16%,  respectively,  of  accounts
receivable represent receivables from the U.S. Government. At December 31, 2023, 47% of accounts receivable represent receivables from international
sales,  which  include  sales  to  four  European  governments  and  a  government  in  the  Asia  Pacific  region.  Collection  of  receivables  from  international
government sales is coordinated through the International Promotion Agreement with 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. An allowance for doubtful accounts is based on specific analysis of the receivables. At December 31, 2023 and 2022,
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:

Warrant liability at December 31, 2021
Decrease in fair value of warrant liability
Exercise of warrants
Warrant liability at December 31, 2022

Fair Value of liability-
classified warrant

6,521,441 
(400,663)
(6,120,778)
- 

  $

  $

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, 2023, the Company's active performance obligations, for the contracts outlined in Note 3, consist
of the following: five performance obligations relate to research and development services; and five 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,  2023,  the  accounts  receivable  balance  in  the  balance  sheet  includes  approximately  $10.3  million  of  unbilled  receivables.  This  amount
primarily  relates  to  international  sales  that  are  billed  under  the  terms  specified  in  the  International  Promotion  Agreement  with  Meridian.  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,  2023,  the  Company  recognized  revenue  of  $0.1  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,  2023,  the  aggregate  amount  of  transaction  price  allocated  to  remaining
performance obligations was $92.1 million. The Company expects to recognize this amount as revenue within the next three years as the specific timing for
satisfying the performance obligations is subjective and is often 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 cash-settled 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.

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.

Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active;
and model-derived valuations where inputs are observable or where significant value drivers are observable.

Level 3 – Instruments where significant value drivers are unobservable to third parties.

There were no transfers between levels of the fair value hierarchy during 2023 or 2022. As of December 31, 2023 and  December 31, 2022, the Company
had approximately $95.1 million and less than $0.1 million, respectively, of cash and cash equivalents classified as Level 1 financial instruments. There
were no Level 2 financial instruments as of  December 31, 2023. As of the December 31, 2022, the Company had approximately $40.5 million of cash
equivalents classified as Level 2 financial instruments. There were no Level 3 financial instruments as of  December 31, 2023 or  December 31, 2022. 

For the years ended December 31, 2023, 2022 and 2021, interest income of $4.2 million, $1.0 million and $0.1 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. The Company does not operate separate lines of business or separate business entities with respect to
any  of  its  product  candidates.  Accordingly,  the  Company  does  not  prepare  discrete  financial  information  with  respect  to  separate  product  areas  or  by
location and has only one reportable segment.

Recent Accounting Pronouncements
In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) No. 2023-07, Segment Reporting (Topic
280): Improvements to Reportable Segment Disclosures, which requires a public entity to disclose significant segment expenses and other segment items
on  an  annual  and  interim  basis  and  provide  in  interim  periods  all  disclosures  about  a  reportable  segment’s  profit  or  loss  and  assets  that  are  currently
required annually. Additionally, it requires a public entity to disclose the title and position of the Chief Operating Decision Maker (CODM). The ASU does
not  change  how  a  public  entity  identifies  its  operating  segments,  aggregates  them,  or  applies  the  quantitative  thresholds  to  determine  its  reportable
segments.  The  new  standard  is  effective  for  fiscal  years  beginning  after  December  15,  2023,  and  interim  periods  within  fiscal  years  beginning  after
December 15, 2024, with early adoption permitted. A public entity should apply the amendments in this ASU retrospectively to all prior periods presented
in  the  financial  statements.  We  expect  this  ASU  to  only  impact  our  disclosures  with  no  impacts  to  our  results  of  operations,  cash  flows  and  financial
condition.

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 financial statements, but will impact our income tax disclosures.

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®, and procurement activities. As of December 31, 2023, 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  $407.1  million  of  payments  are  related  to  exercised  options,  and  up  to  approximately
$143.7 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,  2023, 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, $4.3 million for the delivery of IV FDP to the Strategic Stockpile and $22.1 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 will be recognized as IV FDP containing such IV BDS is delivered to and accepted by the Strategic Stockpile.

The  options  that  have  been  exercised  to  date  provide  for  payments  up  to  approximately  $407.1  million.  There  are  exercised  options  for  the  following
activities: payments up to $337.7 million for the manufacture and delivery of up to 1.1 million courses of oral TPOXX®; payments up to $51.2 million for
the  manufacture  of  courses  of  IV  FDP,  of  which  $20.4  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, 2023, the Company has cumulatively delivered $323.0 million of oral TPOXX® to the
Strategic  Stockpile,  of  which  $97.9  million  was  delivered  in  the  fourth  quarter  of  2023;  has  cumulatively  received  $20.5  million  for  the  completed
manufacture  of  IV  BDS,  of  which  $20.5  million  has  been  recorded  as  deferred  revenue  as  of  December  31,  2023;  and  has  been  cumulatively
reimbursed $7.9 million in connection with post-marketing activities for oral and IV TPOXX®. In the first two months of 2024 ended February 29, 2024,
approximately $15 million of oral TPOXX® was delivered to the Strategic Stockpile. 

Unexercised options specify potential payments up to approximately $143.7 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.  There  are  options  for  the  following  activities:  payments  of  up  to
$112.5 million for the delivery of oral TPOXX® to the Strategic Stockpile; and 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 to only 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. 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.

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, 2023 and 2022, the Company
recognized revenues of $3.0 million and $6.2 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, 2023 and 2022, was $97.9 million and $7.2 million, respectively. 

U.S. Department of Defense Procurement Contracts

On  May  12,  2022,  the  Company  announced  a  contract  with  the  U.S.  Department  of  Defense  ("DoD")  for  the  procurement  of  oral  TPOXX®  ("DoD
Contract #1").  The DoD Contract #1 included a firm commitment for the DoD to procure approximately $3.6 million of oral TPOXX®, and an option,
exercisable at the sole discretion of the DoD, for the procurement of an additional approximately $3.8 million of oral TPOXX®.  In the second quarter of
2022, the Company delivered oral TPOXX® to the DoD and recognized revenue of $3.6 million, fulfilling the firm commitment in DoD Contract #1. In the
third quarter of 2022, the DoD exercised the option for $3.8 million of oral TPOXX® and the Company satisfied its obligation by delivering product in
September 2022 and recognized the related revenue. 

On September  28,  2022,  the  Company  and  the  DoD  signed  a  new  procurement  contract  ("DoD  Contract  #2").  The  DoD  Contract  #2  included  a  firm
commitment  for  the  DoD  to  procure  approximately  $5.1  million  of  oral  TPOXX®,  and  an  option,  exercisable  at  the  sole  discretion  of  the  DoD  for  the
procurement of an additional approximately $5.5 million of oral TPOXX®.

In March 2023, the Company fulfilled the firm commitment by delivering $5.1 million of oral TPOXX® to the DoD, and recognized the related revenue.
Additionally,  in  March  2023  the  DoD  exercised  the  $5.5  million  option  in  DoD  Contract  #2  for  the  procurement  of  oral  TPOXX®  and  the  Company
delivered these courses to the DoD in the fourth quarter of 2023 and recognized the related revenue.

In February 2024, DoD Contract #2 was amended and approximately $1 million of oral TPOXX® was ordered by the DoD.

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International Procurement Contracts

In 2023, the Company has 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.  In  the  first  two  months  of  2024  ending  February  29,  2024,  the  Company  delivered  an  additional
approximately  $7  million  of  oral  TPOXX®  to  six  countries  in  Europe,  completing  greater  than  95%  of  deliveries  under  the  $18  million  of  firm
commitment  orders  from  13  countries  under  the  European  Commission’s  DG  HERA  (Health  Emergency  Preparedness  and  Response  Authority)  joint
procurement  mechanism,  which  was  announced  by  the  Company  in  October  2022.  Additionally,  $0.7  million  of  oral  TPOXX®  was  delivered  to  the
Canada  Department  of  National  Defence  ("CDND")  in  February  2024.  These  deliveries  were  made  in  connection  with  orders  and  contracts  under  the
International Promotion Agreement (defined and discussed below). Through the International Promotion Agreement, Meridian Medical Technologies, Inc.
("Meridian") is the counterparty to international contracts under which orders are placed for the purchase of oral TPOXX®. 

In  addition  to  the  above-mentioned  orders  and  deliveries,  the  Company  has  a  contract  with  the  CDND  under  which  the  CDND  has  an  option  until
December 31, 2025, exercisable at its sole discretion, for the purchase of up to an additional $6.7 million of oral TPOXX®. As an international contract,
this contract is also administered under the International Promotion Agreement. The contract with the CDND (the "Canadian Military Contract"), issued in
April of 2020 and subsequently amended, is option-based and initially specified that the CDND would purchase up to $14 million of oral TPOXX® if all
options were exercised. 

In  2022,  the  Company  received  firm  commitment  orders  from  13  international  customers  (including  Canada)  for  the  delivery  of  approximately
$77 million of oral TPOXX®, of which approximately $39 million was for Canada and approximately $38 million was for jurisdictions in Europe, Asia-
Pacific, and the Middle East. With respect to the $77 million of firm commitment orders that were received in 2022, approximately $71 million of oral
TPOXX® was delivered and recorded as revenue in 2022, and the remainder was delivered and recorded as revenue in 2023.

Under  the  International  Promotion  Agreement,  Meridian  is  the  counterparty  in  connection  with  international  contracts  for  oral  TPOXX®  and  SIGA  is
responsible for manufacture and delivery of any oral TPOXX® purchased thereunder.

Under the terms of the International Promotion Agreement, as amended, which has an initial term that expires on May 31, 2024, Meridian  was  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 has agreed not to commercialize any competing product, as defined in
the International Promotion Agreement, in the specified field of use in the Territory. SIGA retains ownership, intellectual property, distribution and supply
rights and regulatory responsibilities in connection with TPOXX®, and, in the United States market, also retains sales and marketing rights with respect to
oral TPOXX®. SIGA’s consent is required for the entry into any sales arrangement pursuant to the International Promotion Agreement.

Sales  to  international  customers  pursuant  to  the  International  Promotion  Agreement  are  invoiced  and  collected  by  Meridian,  and  such  collections  are
remitted,  less  Meridian's  fees,  to  the  Company  under  a  quarterly  process  specified  in  the  International  Promotion  Agreement. The  fee  Meridian  retains
pursuant to the International Promotion Agreement is 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  are  less  than  or  equal  to  a  specified  threshold,  and  a  higher  specified
percentage of such collected net proceeds for calendar years in which such net collected amounts exceed the specified threshold. We exceeded the specified
threshold in 2022 and therefore recorded the higher specified percentage for all International Promotion Agreement sales in 2022.

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, 2023, the Company recognized $21.3 million of sales in connection
with international contracts. During the year ended  December 31, 2022, the Company recognized $71.0 million of sales in connection with international
contracts. 

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.  As  of  December  31,  2023,  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. For the years ended December 31, 2023 and 2022, the Company,
under the PEP Label Expansion R&D Contract, recognized revenue of $6.4 million and $17.9 million, respectively, on an over time basis.

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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4. Inventory

Inventory consisted of the following:

Raw materials
Work in-process
Finished goods
Inventory

5. Property, Plant and Equipment

Property, plant and equipment consisted of the following:

Leasehold improvements
Computer equipment
Furniture and fixtures
Operating lease right-of-use asset

Less-accumulated depreciation

Property, plant and equipment, net

As of

December 31,
2023

December 31,
2022

8,061,800    $
53,649,859     
2,506,678     
64,218,337    $

6,370,581 
27,038,845 
5,863,664 
39,273,090 

As of

December 31,
2023

December 31,
2022

2,420,028    $
468,937     
347,045     
3,678,647     
6,914,657     
(5,582,949)    
1,331,708    $

2,420,028 
449,143 
347,045 
3,678,647 
6,894,863 
(5,046,549)
1,848,314 

  $

  $

  $

  $

Depreciation  and  amortization  expense  on  property,  plant,  and  equipment  was  $0.5  million  for  each  of  the  years  ended  December  31,  2023, 2022,  and
2021. 

6. Accrued Expenses

Accrued expenses and other current liabilities consisted of the following:

Inventory
Compensation
Other
Lease liability, current portion
Professional fees
Research and development vendor costs

Accrued expenses and other current liabilities

58

As of

December 31,
2023

December 31,
2022

  $

  $

3,300,985    $
2,792,874     
2,659,608     
564,009     
445,653     
418,681     
10,181,810    $

31,160 
2,378,035 
1,277,779 
528,170 
536,997 
1,551,920 
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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:

Net income for basic earnings per share
Less: Change in fair value of warrants
Net income, adjusted for change in fair value of warrants for diluted
earnings per share
Weighted-average shares
Effect of potential common shares
Weighted-average shares: diluted
Earnings per share: basic
Earnings per share: diluted

  $

  $

  $
  $

2023

Year Ended December 31,
2022

2021

68,068,826    $
—     

68,068,826    $
71,362,209     
317,061     
71,679,270     
0.95    $
0.95    $

33,904,806    $
400,663     

33,504,143    $
72,929,550     
616,951     
73,546,501     
0.46    $
0.46    $

69,450,766 
117,770 

69,332,996 
75,322,194 
1,080,522 
76,402,716 
0.92 
0.91 

For the years ended December 31, 2023, December 31, 2022 and December 31, 2021, weighted-average diluted shares include the dilutive effect of in-the-
money options and stock-settled RSUs. For the years ended December 31, 2022 and December 31, 2021, 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,  2023,  2022
and 2021 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, 2023, 2022  and  2021,  the  weighted  average  number  of  shares  under  the  cash-settled
RSUs excluded from the calculation of diluted earnings per share was 32,660, 17,388, and 29,873, respectively. 

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8. Stockholders’ Equity

On December 31, 2023, 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, 2023 and 2022, 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  upon  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.  During  the  year  ended    December  31,  2023,  the  Company
repurchased 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 December 31, 2023, the Repurchase Authorization expired.

On May 4, 2023, the Board of Directors declared a special dividend of $0.45 per share on the common stock of the Company, which resulted in an overall
dividend payment of approximately $32 million. The special dividend was paid on June 1, 2023 to shareholders of record at the close of business on May
16, 2023.

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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, 2023, 2022 and 2021, the Company recorded stock-based compensation expense, including stock options and RSUs, of
approximately $2.1 million, $1.8 million and $1.3 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.

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

    Weighted
Average

  Number of

Options

Exercise
Price

    Weighted    
Average
Remaining
Life
(in years)

    Aggregate

Intrinsic
Value

Outstanding at January 1, 2023 (1)

Granted
Exercised
Canceled/Expired

Outstanding at December 31, 2023
Vested at December 31, 2023
Exercisable at December 31, 2023

226,896    $
25,000     
(28,796)    
(28,796)    
194,304    $
194,304    $
194,304    $

6.58     
6.07     
3.04     
5.12     
6.51     
6.51     
6.51     

7.88    $
7.88    $
7.88    $

14,266 
14,266 
14,266 

(1) Balances as of January 1, 2023 differ from those as of December 31, 2022 presented in the Company's 2022 Form 10-K due to the special dividend paid
during 2023. 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, 2023, there is no remaining unrecognized stock-based compensation cost related to stock options expected to be recognized. The total
fair value of stock options which vested during the years ended December 31, 2023 and 2022 was approximately $123,000 and $375,000, respectively.

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. There were no stock options exercised during the years
ended December 31, 2022 and December 31, 2021. 

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Restricted Stock Units
RSUs 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:

Outstanding at January 1, 2023 (1)

Granted (2)
Vested and released
Canceled/Expired

Outstanding at December 31, 2023 (2)

(1) includes 30,702 awards which were settled in cash.
(2) includes 59,309 awards which were expected to be settled in cash.

Number of
RSUs

295,705    $
415,438     
(217,799)    
(7,019)    
486,325    $

Weighted
Average
Grant-Date
Fair Value

8.56 
6.14 
8.77 
7.63 
6.41 

As of December 31, 2023, $1.5 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  0.8  years.  The  weighted  average  fair  value  at  the  date  of  grant  for  restricted  stock  awards
granted during the years ended December 31, 2023, 2022 and 2021 was $6.14, $9.40 and $6.95 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, 2023, 2022 and 2021 was approximately
$1.9 million, $1.2 million and $0.9 million, respectively.

10. Income Taxes

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

Current:

Federal
State and local
Foreign
Total current provision

Deferred:
Federal
State and local
Foreign
Total deferred (benefit) provision
Total provision

For the year ended December 31,
2022

2023

2021

  $

  $

23,698,658    $
792,477     
14,445     
24,505,580     

(4,711,556)    
(86,177)    
—     
(4,797,733)    
19,707,847    $

13,154,619    $
897,285     
3,800     
14,055,704     

(3,818,283)    
(9,495)    
—     
(3,827,778)    
10,227,926    $

19,211,782 
513,753 
13,994 
19,739,529 

89,947 
31,499 
— 
121,446 
19,860,975 

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

Deferred income tax assets:
State net operating losses
Inventory
Reserves and accruals
Amortization of intangible assets
Share-based compensation
Fixed Assets
Deferred revenue
Capitalized R&D
Lease liability
Other

Deferred income tax assets

Less: valuation allowance

Deferred income tax assets, net of valuation allowance

Deferred income tax liabilities:
Amortization of goodwill
Property, plant and equipment
Other

Deferred income tax asset, net

As of December 31,

2023

2022

  $

  $

  $

1,194,814    $
777,146     
666,772     
7,852     
506,451     
34,546     
2,256,099     
6,198,455     
319,074     
514,150     
12,475,359     
(943,903)    
11,531,456    $

(192,130)    
—     
(291,208)    
11,048,118    $

1,247,826 
336,333 
569,290 
24,532 
510,058 
— 
66,011 
4,194,106 
443,902 
380,162 
7,772,220 
(985,783)
6,786,437 

(192,083)
(59,727)
(284,242)
6,250,385 

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, 2023, 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 $42,000
during the year ended December 31, 2023.

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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:

Statutory federal income tax rate
State and local taxes
Change in fair value of common stock warrant
Section 162(m) limitation
Other

Effective tax rate

2023

As of December 31,
2022

2021

21.0%     
0.1%     
—     
0.4%     
1.0%     
22.5%     

21.0%     
1.6%     
(0.2)%     
0.7%     
0.1%     
23.2%     

21.0% 
0.5% 
— 
0.5% 
0.2% 
22.2% 

For the years ended December 31, 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), shortfalls from stock-based compensation, and state
and local taxes. For the year ended December 31, 2021, the Company's effective tax rate differs from the statutory rate of 21% primarily as a result of non-
deductible executive compensation under IRC Section 162(m), a non-taxable adjustment for the fair market value of the Warrant, and state and local taxes.

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

Balance at beginning of year
Tax positions related to the current and prior years:

Additions
Reductions
Settlements

Lapses in applicable statutes of limitation
Balance at the end of the year

For the year ended December 31,
2022

2021

2023

  $

5,103,548    $

5,602,587    $

5,591,587 

—     
(17,096)    
—     
(4,842)    
5,081,610    $

—     
(68,792)    
—     
(430,247)    
5,103,548    $

11,000 
— 
— 
— 
5,602,587 

  $

Included in the balance of unrecognized tax benefits as of December 31, 2023, are potential benefits of $5.1 million that, if recognized, would affect the
effective  tax  rate.  The  total  amount  accrued  for  interest  and  penalties  as  of   December 31, 2023  and    December  31,  2022,  was  $214,000  and  $72,000,
respectively. For the years ended  December 31, 2023 and  December 31, 2022, the Company recorded an income tax expense of $142,000 and an income
tax benefit of $23,000, 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, 2023.

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 2020 to 2023. The Company's state and local tax years that are open to tax examination are generally 2019 to 2023.

11. Revenues by Geographic Region

Revenues by geographic region were as follows:

United States

International

Asia-Pacific
Canada
Europe, Middle East and Africa (EMEA)
Other

Total International

Total revenues

For the year ended December 31,
2022

2023
118,650,253    $

  $

39,803,888    $

14,853,233     
38,875,657     
16,270,033     
972,799     
70,971,722     

2021
120,656,294 

— 
13,014,160 
— 
— 
13,014,160 

966,633     
—     
20,300,334     
—     
21,266,967     

  $

139,917,220    $

110,775,610    $

133,670,454 

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12. Commitments and Contingencies

Operating lease commitments
The Company leases its Corvallis, Oregon, facilities and 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 connection with the exercise of the second renewal option, the Company recorded an increase to operating lease right-of-use assets
and operating lease liabilities of approximately $0.7 million in the second quarter 2021. 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, 2023 and 2022. Cash paid for amounts included in the measurement of
lease  liabilities  from  operating  cash  flows  was  $0.7  million  and  $0.6  million  for  the  years  ended  December  31,  2023  and  2022,  respectively.  As  of
December 31, 2023, the weighted-average remaining lease term of the Company’s operating leases was 2.87 years while the weighted-average discount
rate was 4.53%.

The following is a maturity analysis of the Company's lease liabilities as of December 31, 2023:

2024
2025
2026
2027
Total undiscounted cash flows under operating leases
Less: Imputed interest
Present value of lease liabilities

  $

  $

622,638 
406,994 
409,971 
165,916 
1,605,519 
(113,642)
1,491,877 

As of December 31, 2023, approximately $0.9 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, 2023, the Company has approximately $14.8 million of purchase commitments associated with manufacturing obligations.

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13. Related Party Transactions

Board of Directors and Outside Counsel
A  former  member  of  the  Company’s  Board  of  Directors  who  did  not  stand  for  re-election  at  the  Company's  2021  annual  meeting  of  stockholders  is  a
partner at a law firm previously used by the Company. The Company did not incur any expenses related to services provided by the outside counsel during
the  year  ended  December  31,  2023  or    December  31,  2022.  During  the  year  ended  December  31,  2021,  the  Company  incurred  expenses  of
approximately $0.1 million related to services provided by the outside counsel. The Company had no outstanding payables or accrued expenses related to
services performed by the outside counsel as of December 31, 2023 and 2022.

Effective June 13, 2023, a director was elected to the Company's Board of Directors who provides consulting services to the Company. Under a consulting
agreement, the director receives a monthly fee of $20,000. During the year ended December 31, 2023, the Company incurred $240,000, respectively, under
this agreement. The Company had no outstanding payables or accrued expenses related to the services performed by this vendor as of December 31, 2023. 

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 first sixty-three months of the term, subject to a rent abatement for the
first  six  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,  2023,  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, 2023 and 2022.

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14. Subsequent Event

On March 12, 2024, the Board of Directors declared a special dividend of $0.60 per share on the common stock of the Company. The special dividend is
payable on April 11, 2024 to shareholders of record at the close of business on March 26, 2024.

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,  2023  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, 2023 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, 2023 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:

•

•

•

pertain  to  the  maintenance  of  records  that,  in  reasonable  detail,  accurately  and  fairly  reflect  the  transactions  and  disposition  of  the  Company’s
assets;

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 the directors of the Company; and

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.

Our management conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2023 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, 2023.

Attestation Report of the Independent Registered Public Accounting Firm

The effectiveness of our internal control over financial reporting as of December 31, 2023 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

None of the Company’s directors or officers adopted, modified or terminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1  trading

arrangement during the Company’s quarter ended December 31, 2023, as such terms are defined under Item 408(a) of Regulation S-K.

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 2024 Annual Meeting of Stockholders ("2024 Proxy
Statement") in Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K, our 2024 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 concerning our directors required by this Item is incorporated by reference to the sub-section titled “Proposals to be Voted on at

the Meeting – Proposal 1: Election of Directors” in our 2024 Proxy Statement.

The  information  concerning  our  executive  officers  required  by  this  Item  is  incorporated  by  reference  to  the  sub-section  titled  "Management  –

Executive Officers" in our 2024 Proxy Statement.

The  information  concerning  the  audit  committee  of  our  board  of  directors  and  the  audit  committee  financial  expert  required  by  this  Item  is
incorporated by reference to the information included in the sub-section titled "Board of Directors – Committees of the Board of Directors" in our 2024
Proxy Statement.

The information concerning our Code of Ethics and Business Conduct for senior management required by this Item is incorporated by reference to

the sub-section titled "Board of Directors – Code of Ethics" in our 2024 Proxy Statement.

If applicable, the information concerning any delinquent filings required by this Item is incorporated by reference to the information included in

the section titled “Delinquent Section 16(a) Reports” in our 2024 Proxy Statement.

Item 11. Executive Compensation

The  information  required  by  this  Item  is  incorporated  by  reference  to  the  sections  titled  “Compensation  Committee  Report,”  “Compensation

Committee Interlocks and Insider Participation” and “Compensation Discussion and Analysis” in our 2024 Proxy Statement.

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

The information required by this Item 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 2024 Proxy Statement.

Equity Compensation Plan Information
The following table sets forth certain compensation plan information with respect to compensation plans as of December 31, 2023:

Plan Category
Equity compensation plans approved by security holders
Equity compensation plans not approved by security holders

Total

Number of Securities to
be Issued Upon Exercise
of Outstanding Options,
Warrants and Restricted
Stock Units (1)

Weighted-average
Exercise Price of
Outstanding Options,
Warrants and Restricted
Stock Units

680,629    $
—     
680,629    $

6.44     
—     
6.44     

Number of Securities
Available for Future
Issuance under Equity
Compensation Plans (2)  
3,427,112 
— 
3,427,112 

(1)
(2)

Consists of the 1996 Incentive and Non-Qualified Stock Option Plan and the 2010 Stock Incentive Plan.
Consists of the 2010 Stock Incentive Plan.

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

The  information  required  by  this  Item  is  incorporated  by  reference  to  the  section  titled  "Transactions  with  Related  Parties"  in  our  2024  Proxy

Statement.

The  information  required  by  this  Item  concerning  director  independence  is  incorporated  by  reference  to  the  sub-section  titled  "Board  of

Directors – Director Independence" in our 2024 Proxy Statement.

Item 14. Principal Accountant Fees and Services

The information required by this Item is incorporated by reference to the section titled "Fees Billed by PricewaterhouseCoopers, LLP" in our 2024

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

3(a)

3(b)

4(a)

4(b)

10(a)

10(b)

10(c)

10(d)

10(e)

10(f)

Amended and Restated Certificate of Incorporation of SIGA Technologies, Inc. (incorporated by reference to the Current
Report on Form 8-K of the Company filed on June 16, 2022).

Amended and Restated By-laws of SIGA Technologies, Inc. (incorporated by reference to the Current Report on Form 8-K
of the Company filed on December 15, 2021).

Form of Common Stock Certificate (incorporated by reference to the Form SB-2 Registration Statement of the Company
dated March 10, 1997 (No. 333-23037)).

Description  of  the  Registrant's  Securities  Registered  pursuant  to  Section  12  of  the  Securities  Exchange  Act  of  1934
(incorporated by reference to the Annual Report on Form 10-K of the Company filed on March 5, 2020).

Securities Purchase Agreement, dated as of August 13, 2003, between the Company and MacAndrews & Forbes Holdings
Inc. (incorporated by reference to the Current Report on Form 8-K of the Company filed on August 18, 2003).

Letter  Agreement,  dated  October  8,  2003,  among  the  Company,  MacAndrews  &  Forbes  Holdings  Inc.  and  TransTech
Pharma, Inc. (incorporated by reference to the Current Report on Form 8-K of the Company filed on October 9, 2003).

Contract, dated as of May 13, 2011, between SIGA and the Biomedical Advanced Research and Development Authority of
the United States Department of Health and Human Services (portions of this exhibit have been omitted and separately
filed with the Securities and Exchange Commission with a request for confidential treatment) (incorporated by reference to
the Current Report on Form 8-K of the Company filed on May 17, 2011).

Amendment of Solicitation/Modification of Contract, dated as of June 24, 2011, to Agreement dated as of May 13, 2011,
between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department of
Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and
Exchange Commission with a request for confidential treatment) (incorporated by reference to the Current Report on Form
8-K of the Company filed on June 28, 2011).

Director Compensation Program, effective April 8, 2021 (incorporated by reference to the Definitive Proxy Statement on
Form DEF 14A of the Company filed on April 27, 2021).*

Amendment of Solicitation/Modification of Contract, dated as of September 28, 2011, to Agreement dated as of May 13,
2011, between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department
of  Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and
Exchange  Commission  with  a  request  for  confidential  treatment)  (incorporated  by  reference  to  the  Quarterly  Report  on
Form 10-Q of the Company filed on May 7, 2012).

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10(g)

10(h)

10(i)

10(j)

10(k)

10(l)

10(m)

10(n)

10(o)

10(p)

10(q)

10(r)

10(s)

Amendment of Solicitation/Modification of Contract, dated as of October 7, 2011, to Agreement dated as of May 13, 2011,
between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department of
Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and
Exchange  Commission  with  a  request  for  confidential  treatment)  (incorporated  by  reference  to  the  Quarterly  Report  on
Form 10-Q of the Company filed on May 7, 2012).

Amendment  of  Solicitation/Modification  of  Contract,  dated  as  of  January  25,  2012,  to  Agreement,  dated  as  of  May  13,
2011, between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department
of  Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and
Exchange  Commission  with  a  request  for  confidential  treatment)  (incorporated  by  reference  to  the  Quarterly  Report  on
Form 10-Q of the Company filed on May 7, 2012).

Amendment  of  Solicitation/Modification  of  Contract,  dated  as  of  February  7,  2012,  to  Agreement,  dated  as  of  May  13,
2011, between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department
of Health and Human Services (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on
May 7, 2012).

Amendment of Solicitation/Modification of Contract, dated as of December 19, 2012, to Agreement, dated as of May 13,
2011, between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department
of  Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and
Exchange Commission with a request for confidential treatment) (incorporated by reference to the Annual Report on Form
10-K of the Company filed on March 6, 2013).

Amendment of Solicitation/Modification of Contract, dated as of February 28, 2013, to Agreement, dated as of May 13,
2011, between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department
of Health and Human Services (incorporated by reference to the Annual Report on Form 10-K of the Company filed on
March 10, 2014).

Amendment of Solicitation/Modification of Contract, dated as of April 9, 2013, to Agreement, dated as of May 13, 2011,
between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department of
Health  and  Human  Services  (incorporated  by  reference  to  the  Annual  Report  on  Form  10-K  of  the  Company  filed  on
March 10, 2014).

Amendment of Solicitation/Modification of Contract 0009, dated April 29, 2015, to Agreement, dated May 13, 2011 by
and between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department
of  Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and
Exchange  Commission  with  a  request  for  confidential  treatment)  (incorporated  by  reference  to  the  Quarterly  Report  on
Form 10-Q of the Company filed on May 6, 2015).

Amendment of Solicitation/Modification of Contract 0010, dated July 1, 2015, to Agreement, dated May 13, 2011 by and
between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department of
Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and
Exchange Commission with a request for confidential treatment) (incorporated by reference to the Annual Report on Form
10-K of the Company filed on March 4, 2016).

Amendment of Solicitation/Modification of Contract 0011, dated December 9, 2015, to Agreement, dated May 13, 2011
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the
Securities and Exchange Commission with a request for confidential treatment) (incorporated by reference to the Annual
Report on Form 10-K of the Company filed on March 4, 2016).

Amended  and  Restated  Employment  Agreement,  dated  April  12,  2016,  between  SIGA  Technologies,  Inc.  and  Daniel  J.
Luckshire (incorporated by reference to the Current Report on Form 8-K of the Company filed on April 14, 2016).*

Amended and Restated Employment Agreement, dated April 12, 2016, between SIGA Technologies, Inc. and Dennis E.
Hruby (incorporated by reference to the Current Report on Form 8-K of the Company filed on April 14, 2016).*

Amendment  of  Solicitation/Modification  of  Contract  0013,  dated  June  28,  2016,  to  Agreement,  dated  May  13,  2011,
between the Biomedical Advanced Research and Development Authority of the United States Department of Health and
Human  Services  and  SIGA  (portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and
Exchange Commission with a request for confidential treatment) (incorporated by reference to the Current Report on Form
8-K of the Company filed on July 5, 2016).

Warrant, dated as of September 2, 2016, by the Company in favor of OCM Strategic Credit SIGTEC Holdings, LLC or its
registered assigns (incorporated by reference to the Current Report on Form 8-K of the Company filed on September 7,
2016).

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10(t)

10(u)

10(v)

10(w)

10(x)

10(y)

10(z)

10(aa)

10(bb)

10(cc)

10(dd)

10(ee)

10(ff)

10(gg)

Employment  Agreement,  dated  as  of  October  13,  2016,  between  SIGA  and  Phillip  Louis  Gomez,  III  (incorporated  by
reference to the Current Report on Form 8-K of the Company filed on October 13, 2016).*

Investment  Agreement,  dated  October  13,  2016,  by  and  among  SIGA  Technologies,  Inc.,  ST  Holdings  One  LLC,
Blackwell Partners LLC-Series A, Nantahala Capital Partners Limited Partnership, Nantahala Capital Partners II Limited
Partnership, Silver Creek CS SAV, L.L.C. and Nantahala Capital Partners SI, LP (incorporated by reference to the Current
Report on Form 8-K of the Company filed on October 19, 2016).

Amendment  of  Solicitation/Modification  of  Contract  0012,  dated  April  22,  2016,  to  Agreement,  dated  May  13,  2011,
between the Biomedical Advanced Research and Development Authority of the United States Department of Health and
Human Services and SIGA (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on May
4, 2017).

Amendment of Solicitation/Modification of Contract 0014, dated September 21, 2016, to Agreement, dated May 13, 2011,
between the Biomedical Advanced Research and Development Authority of the United States Department of Health and
Human Services and SIGA (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on May
4, 2017).

Office Lease, dated as of May 26, 2017, by and between SIGA Technologies, Inc. and MacAndrews & Forbes Incorporated
(portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and  Exchange  Commission  with  a
request for confidential treatment) (incorporated by reference to the Current Report on Form 8-K of the Company filed on
May 30, 2017).

Commercial Lease Agreement for Corvallis, Oregon dated November 3, 2017 (incorporated by reference to the Quarterly
Report on Form 10-Q of the Company filed on November 7, 2017).

Amendment  of  Solicitation/Modification  of  Contract  0015,  dated  July  30,  2018,  to  Agreement,  dated  May  13,  2011,
between the Biomedical Advanced Research and Development Authority of the United States Department of Health and
Human Services and SIGA (incorporated by reference to the Current Report on Form 8-K of the Company filed on August
1, 2018).

Addendum,  dated  August  10,  2018,  to  Second Amended  and  Restated  Employment  Agreement,  dated  April  12,  2016,
between SIGA Technologies, Inc. and Dennis E. Hruby (incorporated by reference to the Current Report on Form 8-K of
the Company filed on August 10, 2018).*

Contract, dated as of September 10, 2018, between SIGA Technologies, Inc. and the Biomedical Advanced Research and
Development Authority of the United States Department of Health and Human Services (portions of this exhibit have been
omitted  and  separately  filed  with  the  Securities  and  Exchange  Commission  with  a  request  for  confidential  treatment)
(incorporated by reference to the Current Report on Form 8-K of the Company filed on September 11, 2018).

Amendment of Solicitation/Modification of Contract 0016, dated September 21, 2018, to Agreement, dated May 13, 2011,
between the Biomedical Advanced Research and Development Authority of the United States Department of Health and
Human  Services  and  SIGA  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the  Company  filed  on
November 6, 2018).

Amendment of Solicitation/Modification of Contract 0017, dated September 28, 2018, to Agreement, dated May 13, 2011,
between the Biomedical Advanced Research and Development Authority of the United States Department of Health and
Human  Services  and  SIGA  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the  Company  filed  on
November 6, 2018).

Amendment of Solicitation/Modification of Contract 0018, dated September 28, 2018 to Agreement, dated June 1, 2011,
between the Biomedical Advanced Research and Development Authority of the United States Department of Health and
Human  Services  and  SIGA  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the  Company  filed  on
November 6, 2018).

Commercial  Manufacturing  Agreement,  dated  October  1,  2018,  by  and  between  Albemarle  Corporation  and  SIGA
(portions  of  this  exhibit  have  been  omitted  and  separately  filed  with  the  Securities  and  Exchange  Commission  with  a
request for confidential treatment) (incorporated by reference to the Annual Report on Form 10-K of the Company filed on
March 6, 2019).

Amendment of Solicitation/Modification of Contract 0001, dated February 21, 2019, to Agreement, dated September 10,
2018, between the Biomedical Advanced Research and Development Authority of the United States Department of Health
and Human Services and SIGA (incorporated by reference to the Annual Report on Form 10-K of the Company filed on
March 6, 2019).

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10(hh)

10(ii)

10(jj)

10(kk)

10(ll)

10(mm)

10(nn)

10(oo)

10(pp)

10(qq)

10(rr)

10(ss)

Amendment of Solicitation/Modification of Contract 0002, dated May 17, 2019, to Agreement, dated September 10, 2018
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of Regulation S-K) (incorporated by reference to the Current Report on Form 8-K of the Company filed on May 20, 2019).  

Amendment of Solicitation/Modification of Contract 0019, dated May 22, 2019, to Agreement, dated June 1, 2011 by and
between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States  Department  of
Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10) of Regulation
S-K) (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on August 6, 2019).

Promotion Agreement, dated May 31, 2019, by and between SIGA Technologies, Inc. and Meridian Medical Technologies,
Inc. (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10) of Regulation S-K) (incorporated by
reference to the Current Report on Form 8-K of the Company filed on June 3, 2019).

Amendment of Solicitation/Modification of Contract 0003, dated September 9, 2019, to Agreement, dated September 10,
2018  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of Regulation S-K) (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on November
5, 2019).

Amendment of Solicitation/Modification of Contract 0020, dated November 19, 2019, to Agreement, dated June 1, 2011
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of  Regulation  S-K)  (incorporated  by  reference  to  the  Annual  Report  on  Form  10-K  of  the  Company  filed  on  March  5,
2020).

Amendment of Solicitation/Modification of Contract 0018, dated November 19, 2019, to Agreement, dated May 13, 2011
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of  Regulation  S-K)  (incorporated  by  reference  to  the  Annual  Report  on  Form  10-K  of  the  Company  filed  on  March  5,
2020).

Amendment  of  Solicitation/Modification  of  Contract  0004,  dated  February  4,  2020,  to  Agreement,  dated  September  10,
2018  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of  Regulation  S-K)  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the  Company  filed  on  May  6,
2020).

Amendment of Solicitation/Modification of Contract 0005, dated April 29, 2020, to Agreement, dated September 10, 2018
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of Regulation S-K) (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on August 6,
2020).

Amendment of Solicitation/Modification of Contract 00021, dated July 2, 2020, to Agreement, dated June 1, 2011 by and
between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States  Department  of
Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10) of Regulation
S-K) (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on November 5, 2020).

Amendment of Solicitation/Modification of Contract 00019, dated July 20, 2020, to Agreement, dated May 13, 2011 by
and between SIGA and the Biomedical Advanced Research and Development Authority of the United States Department
of  Health  and  Human  Services  (certain  portions  of  this  exhibit  have  been  omitted  pursuant  to  Item  601(b)(10)  of
Regulation S-K) (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on November 5,
2020).

Third  Amended  and  Restated  Employment  Agreement,  dated  January  20,  2021,  between  SIGA  Technologies,  Inc.  and
Robin E. Abrams (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K of the Company filed on
January 22, 2021).*

Amendment of Solicitation/Modification of Contract 0007, dated September 8, 2021, to Agreement, dated September 10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the
Company filed on November 4, 2021).

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10(tt)

10(uu)

10(vv)

10(ww)

10(xx)

10(yy)

10(zz)

10(aaa)

10(bbb)

10(ccc)

10(ddd)

10(eee)

10(fff)

10(ggg)

10(hhh)

Amendment  of  Solicitation/Modification  of  Contract  00006,  dated  April  29,  2021,  to  Agreement,  dated  September  10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of  Regulation  S-K)  (incorporated  by  reference  to  the  Annual  Report  on  Form  10-K  of  the  Company  filed  on  March  3,
2022).

Amendment of Solicitation/Modification of Contract 00008, dated December 9, 2021, to Agreement, dated September 10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (incorporated by reference to the Annual Report on Form 10-K of the Company
filed on March 3, 2022).

Amendment of Solicitation/Modification of Contract 00020, dated November 8, 2021, to Agreement, dated May 13, 2011,
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (incorporated by reference to the Annual Report on Form 10-K of the Company
filed on March 3, 2022).

Amendment of Solicitation/Modification of Contract 00022, dated November 8, 2021, to Agreement, dated June 1, 2011,
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (incorporated by reference to the Annual Report on Form 10-K of the Company
filed on March 3, 2022).

Amendment of Solicitation/Modification of Contract 000023, dated February 15, 2022, to Agreement, dated June 1, 2011,
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of  Regulation  S-K)  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the  Company  filed  on  May  5,
2022).

Amendment of Solicitation/Modification of Contract 00009, dated January 27, 2022, to Agreement, dated September 10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of Regulation S-K) (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on November
3, 2022).

Amendment  of  Solicitation/Modification  of  Contract  00010,  dated  March  29,  2022,  to  Agreement,  dated  September  10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the
Company filed on November 3, 2022).

Amendment  of  Solicitation/Modification  of  Contract  000011,  dated  July  26,  2022,  to  Agreement,  dated  September  10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the
Company filed on November 3, 2022).

Amendment of Solicitation/Modification of Contract 000012, dated August 5, 2022, to Agreement, dated September 10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of Regulation S-K) (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on November
3, 2022).

Amendment  of  Solicitation/Modification  of  Contract  000021,  dated  September  28,  2022,  to  Agreement,  dated  May  13,
2011,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department of Health and Human Services (certain portions of this exhibit have been omitted pursuant to Item 601(b)(10)
of Regulation S-K) (incorporated by reference to the Quarterly Report on Form 10-Q of the Company filed on November
3, 2022).

Amendment  of  Solicitation/Modification  of  Contract  000022,  dated  September  29,  2022,  to  Agreement,  dated  May  13,
2011,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the
Company filed on November 3, 2022).

Transition  Agreement,  dated  January  13,  2023,  between  SIGA  Technologies,  Inc.  and  Phillip  Louis  Gomez,  III
(incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K of the Company filed January 17, 2023).* 

Amended  and  Restated  Transition  Agreement,  dated  July  26,  2023,  between  SIGA  Technologies,  Inc.  and  Phillip  Louis
Gomez, III (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K of the Company filed July 28,
2023).* 

Proposal  for  the  Amendment  of  the  Employment  Agreement  with  Dennis  E.  Hruby  (portions  of  this  exhibit  have  been
omitted pursuant to Item 601(b)(2)(ii) or 601(b)(10)(iv) of Regulation S-K, as applicable) (incorporated by reference to the
Quarterly Report on Form 10-Q of the Company filed on August 8, 2023).* 

Amendment of Solicitation/Modification of Contract 00013, dated July 27, 2023, to Agreement, dated September 10, 2018,
by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  pursuant  to  Item  601(b)(2)(ii)  or

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
601(b)(10)(iv) of Regulation S-K, as applicable) (incorporated by reference to the Quarterly Report on Form 10-Q of the
Company filed on August 8, 2023).

74

 
 
 
Table of Contents

10(iii)

10(jjj)

10(kkk)

10(lll)

10(mmm)

10(nnn)

Employment Agreement, dated July 26, 2023, between SIGA Technologies, Inc. and Dr. Jay K. Varma (incorporated by
reference to the Quarterly Report on Form 10-Q of the Company filed on November 7, 2023).* 

Amendment  of  Solicitation/Modification  of  Contract  000024,  dated  September  21,  2023,  to  Agreement,  dated  June  1,
2011,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (incorporated  by  reference  to  the  Quarterly  Report  on  Form  10-Q  of  the
Company filed on November 7, 2023). 

Amendment to the Amended and Restated Transition Agreement, dated January 1, 2024, between SIGA Technologies, Inc.
and  Phillip  Louis  Gomez,  III  (incorporated  by  reference  to  Exhibit  10.1  to  the  Current  Report  on  Form  8-K  of  the
Company filed January 2, 2024).*

Employment Agreement, dated January 19, 2024, between SIGA Technologies, Inc. and Diem Nguyen (incorporated by
reference to Exhibit 10.1 to the Current Report on Form 8-K of the Company filed January 22, 2024).*

Amendment of Solicitation/Modification of Contract 00014, dated October 18, 2023, to Agreement, dated September 10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  pursuant  to  Item  601(b)(2)(ii)  or
601(b)(10)(iv) of Regulation S-K, as applicable).

Amendment of Solicitation/Modification of Contract 00015, dated February 9, 2024, to Agreement, dated September 10,
2018,  by  and  between  SIGA  and  the  Biomedical  Advanced  Research  and  Development  Authority  of  the  United  States
Department  of  Health  and  Human  Services  (portions  of  this  exhibit  have  been  omitted  pursuant  to  Item  601(b)(2)(ii)  or
601(b)(10)(iv) of Regulation S-K, as applicable).

23.1

Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm.

31.1

31.2

32.1

32.2

97.1

Certification pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-
Oxley Act of 2002-Chief Executive Officer.

Certification pursuant to Rules 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-
Oxley Act of 2002-Chief Financial Officer.

Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002-Chief Executive
Officer.

Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002-Chief Financial
Officer.

SIGA Technologies, Inc. Clawback Policy

101.INS

Inline XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded
within the Inline XBRL document)

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

104

Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)

* management contract, compensatory plan or arrangement.

75

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Item 16. Form 10-K Summary

None.

76

 
 
 
Table of Contents

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.

Date: March 12, 2024

SIGA TECHNOLOGIES, INC.
(Registrant)

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
/s/ Diem Nguyen, Ph.D.
Diem Nguyen, Ph.D.

/s/ Daniel J. Luckshire
Daniel J. Luckshire

/s/ Jaymie Durnan
Jaymie Durnan

/s/ Harold E. Ford, Jr.
Harold E. Ford, Jr.

/s/ Evan Knisely
Evan Knisely

/s/ Joseph Marshall
Joseph Marshall

/s/ Gary J. Nabel
Gary J. Nabel

/s/ Julian Nemirovsky
Julian Nemirovsky

/s/ Holly L. Phillips
Holly L. Phillips

/s/ Jay K. Varma
Jay K. Varma

  Title of Capacities

  Chief Executive Officer and Director
  (Principal Executive Officer)

  Executive Vice President and
  Chief Financial Officer
  (Principal Financial Officer and
  Principal Accounting Officer)

  Director

  Director

  Director

  Director

  Director

  Director

  Director

  Director

77

  Date
  March 12, 2024

  March 12, 2024

  March 12, 2024

  March 12, 2024

  March 12, 2024

  March 12, 2024

  March 12, 2024

  March 12, 2024

  March 12, 2024

  March 12, 2024

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
   
 
   
 
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
CERTAIN INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY "[***]," HAS BEEN OMITTED BECAUSE IT IS
BOTH (I) NOT MATERIAL AND (II) THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL.

Exhibit 10(mmm)

AMENDMENT OF SOLICITATION/MODIFICATION OF
CONTRACT

1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NO.
P00014

6. ISSUED BY                                        CODE

ASPR-BARDA
200 Independence Ave., S.W.
Room 640-G
Washington DC 20201

  5. PROJECT NO. (If applicable)

3.
EFFECTIVE
DATE
10/17/2023

4.
REQUISITION/PURCHASE
REQ. NO.

ASPR-
BARDA

7. ADMINISTERED BY (If
other than Item 6)                 

PAGE OF
PAGES
 1         |         6

CODE 

8. NAME AND ADDRESS OF CONTRACTOR (No., street,
county, State and ZIP Code)

(x)

 9A. AMENDMENT OF SOLICITATION NO.

SIGA TECHNOLOGIES, INC.         1385150
Attn: Daniel Luckshire
SIGA TECHNOLOGIES, INC.
31 East 62nd street
NEW YORK NY 100658446

CODE 1385150

 FACILITY
CODE

x

 9B. DATED (SEE ITEM 11)
 10A. MODIFICATION OF CONTRACT/ORDER NO.
 HHSO100201800019C

 10B. DATED (SEE ITEM 13)
 09/10/2018

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

☐ The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers                 ☐ is
extended,        ☐ is not extended.
     Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following
methods: (a) By completing
   Items 8 and 15, and returning ____________ copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer
submitted ; or (c) By
   separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR
ACKNOWLEDGEMENT TO BE
   RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT
IN REJECTION OF YOUR
   OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic
communication, provided
   each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date
specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)
See Schedule

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS
DESCRIBED IN ITEM 14.

CHECK
ONE

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE
CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in
paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

X

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:
FAR Part 43.103(a) - Bilateral Modifications
D. OTHER (Specify type of modification and authority)

E. IMPORTANT:         Contractor         ☐ is not          ☒ is required to sign this document and return         ____________1_______ copies to the issuing
office.
14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

Tax ID Number: 13-3864870
UEI: VJRNRTSL22K4
The purpose of this modification is to correct the total value of CLIN0014 from [***] to [***], change
Option CLINs 0023, 0024, 0025, 0026, and 0027 from Treatment Course (TC) to Vials, CLIN0007 total value
should read $14,612,790 versus $40,812,609, add travel under Contracting Officer Authorizations shall not
exceed $150,000, and the overall funded value of the contract is [***] versus [***].

All other terms and conditions remain unchanged.

 
 
 
 
 
 
 
                            
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Continued ...
Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect.
15A. NAME AND TITLE OF SIGNER (Type or print)
Dennis Hruby
15B. CONTRACTOR/OFFEROR

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)
JONATHAN F. GONZALEZ
16B. UNITED STATES OF
AMERICA
/s/ Jonathan F. Gonzalez     

16C. DATE SIGNED

October 18, 2023

15C. DATE
SIGNED
October 18,
2023

/s/ Dennis Hruby                                 
(Signature of person authorized to sign)

Previous edition unusable

 (Signature of Contracting
Officer)

STANDARD
FORM 30
(REV.
11/2016)
Prescribed by
GSA FAR (48
CFR) 53.243

 
            
 
 
 
 
CONTINUATION SHEET REFERENCE NO. OF DOCUMENT BEING CONTINUED

HHSO100201800019C/P00014

PAGE OF
2         |         6

NAME OF OFFEROR OR CONTRACTOR
SIGA TECHNOLOGIES, INC. 1385150

ITEM
NO.
(A)

SUPPLIES/SERVICES
(B)

QUANTITY
(C)

UNIT
(D)

UNIT
PRICE
(E)

AMOUNT
(F)

OTA: N
Discount Terms: HHS NET 30P
Period of Performance: 01/01/2020 to 09/09/2028

NSN 7540-01-152-8067

ARTICLE B. 2. PRICE/COSTS, revisions are highlighted in yellow: 
B.2. PRICES/COSTS

B.2.1. ESTIMATED COST AND FIXED FEE

 Base Period Cost Reimbursement CLIN
 Item

 Period of Performance  Supplies/Services

 0001 Base

 [***]

 Total

B.2.2. FIRM FIXED PRICE

 Late-Stage development activities
towards FDA approval for parenteral
(IV) antiviral

 Base Period Fixed Price CLINS
 Item
 0002 Base

 Period of Performance Supplies/Services
 [***]

 0003 Base

 [***]

 0004 Base

 [***]

 0005 Base

 [***]

 0006 Base

 [***]

Initial purchase and delivery of
nonparenteral (oral) formulated antiviral
as final drug product (FDP) to SNS
Initial procurement of parenteral (IV)
formulated antiviral as bulk drug
substance (BDS) *TC = 28 vials
Fill/finish of final drug product (from
bulk drug substance procured under
CLIN 0003)
Storage of final drug product in VMI for
5 years (from bulk drug substance
procured under CLIN0003) *Monthly
rate per TC = [***]
Delivery of FDP to the SNS/USG
designated location (from bulk drug
substance procured under CLIN 0003

OPTIONAL FORM 336 (4-
86)
Sponsored by GSA
FAR (48 CFR) 53.110

Estimated Cost

Fixed Fee

[***]

[***]

[***]

[***]

Cost + Fixed Fee
(CPFF)
$32,009,375 (Funded)

[***]

Treatment Courses
35,718

Unit Price
[***]

Total
$11,072,580 (Funded)

10,000

[***]

$3,200,000 (Funded)

10,000

[***]

$4,800,000 (Funded)

10,000

[***]

[***]

10,000

[***]

[***]

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Total

and Process Validation lot manufactured
under CLIN 0001)

 Optional Cost Reimbursement CLINs
 Item

 Period of Performance Supplies/Services

Estimated Cost

Fixed Fee

 0007 (Option)  [***]

 0008 (Option)  [***]

 Total

Phase IV post-marketing commitments
(nonparenteral (oral) formulation )) including
[***]
Phase IV post marketing commitments
(parenteral (IV) formulation)) including [***]

 Optional Fixed Price CLINs
 Item

 Period of
Performance
 [***]

 0009A
(Option)

 0009B
(Option)

 0009C
(Option)

 0009D
(Option)

 [***]

 [***]

 [***]

 0010 (Option)

 [***]

 0011 (Option)

 [***]

 0012 (Option)

 [***]

 0013 (Option)

 [***]

 0014 (Option)

 [***]

 0015 (Option)

 [***]

 0016 (Option)

 [***]

 0017 (Option)

 [***]

 0018 (Option)

 [***]

 0019 (Option)

 [***]

 0020 (Option)

 [***]

 0021 (Option)

 [***]

 0022 (Option)

 [***]

 Supplies/Services

Procurement of raw materials used in
manufacturing of unmicronized API in sufficient
quantity to support the production of 363,070
courses of nonparenteral (oral) formulated
antiviral for SNS replenishment. Such raw
materials may be forward processed.
Additional procurement of nonparenteral (oral)
formulated antiviral as FDP & delivery to the
SNS
Additional procurement of nonparenteral (oral)
formulated antiviral as FDP & delivery to the
SNS
Additional procurement of nonparenteral (oral)
formulated antiviral as FDP & delivery to the
SNS
Additional procurement of nonparenteral (oral)
formulated antiviral as FDP & delivery to the
SNS
Additional procurement of a nonparenteral (oral)
formulated antiviral as FDP & delivery to the
SNS
Additional procurement of a nonparenteral (oral)
formulated antiviral as FDP & delivery to the
SNS
Surge Capacity – Additional procurement of
parenteral (IV) formulated antiviral as bulk drug
substance (BDS) *TC = 28 vials
Surge Capacity – Storage of parenteral (IV)
formulated antiviral as bulk drug substance (BDS)
in VMI for 5 years (from bulk drug substance
procured under CLIN 0013). *Monthly rate per
TC = [***]
Surge Capacity – Fill/finish of final drug product
(from bulk drug substance procured under CLIN
0013)
Surge Capacity – Storage of final drug product in
VMI for 5 years (from bulk drug substance
procured under CLIN 0013). *Monthly rate per
TC = [***]
Surge Capacity – Delivery of FDP to the SNS
(from bulk drug substance procured under CLIN
0013)
Surge Capacity – Additional procurement of
parenteral (IV) formulated antiviral as bulk drug
substance (BDS) *TC = 28 vials
Surge Capacity – Storage of parenteral (IV)
formulated antiviral as bulk drug substance (BDS)
in VMI for 5 years (from bulk drug substance
procured under CLIN 0018). *Monthly rate per
TC = [***]
Surge Capacity – Fill/finish of final drug product
from bulk drug substance procured under CLIN
0018).
Surge Capacity – Storage of final drug product in
VMI for 5 years (from bulk drug substance
procured under CLIN 0018). *Monthly rate per
TC = [***]
Surge Capacity – Delivery of FDP to the SNS

[***]

Cost + Fixed Fee
(CPFF)
$14,612,790 Funded

$3,586,806 Funded

[***]

[***]

[***]

[***]

Unit Price

Total

[***]

$11,255,170 Funded

[***]

$33,765,417 Funded

[***]

$33,765,417 Funded

[***]

$33,765,696 Funded

[***]

[***]

[***]

Treatment
Courses
363,070 (raw
material)

121,023 (raw
material)

121,023 (raw
material)

121,024 (raw
material)

363,070

[***]

$112,551,700 Funded

363,070

[***]

$112,551,700 (Funded)

363,072

[***]

$112,552,320

32,000

[***]

$10,240,000 (Funded)

32,000

[***]

[***]

32,000

[***]

$15,360,000 (Funded)

32,000

[***]

[***]

32,000

[***]

[***]

32,000

[***]

$10,240,000 (Funded)

32,000

[***]

[***]

32,000

[***]

$15,360,000 (Funded)

32,000

[***]

[***]

32,000

[***]

[***] (Funded)

 
 
 
 
 
 
 
 
 0023 (Option)

 [***]

 0024 (Option)

 [***]

 0025 (Option)

 [***]

 0026 (Option)

 [***]

 0027 (Option)   [***]

(from bulk drug substance procured under CLIN
0018).
Surge Capacity – Additional procurement of
parenteral (IV) formulated antiviral as bulk drug
substance (BDS) *TC = 28 vials
Surge Capacity – Storage of parenteral (IV)
formulated antiviral as bulk drug substance (BDS)
in VMI for 5 years (from bulk drug substance
procured under CLIN 0023). *Monthly rate per
TC = [***]
Surge Capacity – Fill/finish of final drug product
(from bulk drug substance procured under CLIN
0023).
Surge Capacity – Storage of final drug product in
VMI for 5 years (from bulk drug substance
procured under CLIN 0023). *Monthly rate per
TC = [***]
Surge Capacity – Delivery of FDP to the SNS
(from bulk drug substance procured under CLIN
0023).

32,000

[***]

$10,240,000

32,000

[***]

[***]

32,000

[***]

$15,360,000

32,000

[***]

[***]

32,000

[***]

Total Contract Value Including All Options 
Total Funded Options 

[***]

[***]
[***]

 
 
 
Exhibit 10(nnn)
CERTAIN INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY "[***]," HAS BEEN OMITTED BECAUSE IT IS BOTH (I)
NOT MATERIAL AND (II) THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

PAGE OF PAGES
2

1

2. AMENDMENT/MODIFICATION NO.
P00015

3. EFFECTIVE DATE
See Block 16C

6. ISSUED BY

CODE ASPR-BARDA

4.
REQUISITION/PURCHASE
REQ. NO.
7. ADMINISTERED BY (If other than Item 6)

5. PROJECT NO. (If
applicable) 

CODE  

ASPR-BARDA
200 Independence Ave., S.W.
Room 640-G
Washington DC 20201

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State
and ZIP Code)

(x)

9A. AMENDMENT OF SOLICITATION NO.

SIGA TECHNOLOGIES, INC. 1385150
Attn: Daniel Luckshire
SIGA TECHNOLOGIES, INC.
31 East 62nd Street
NEW YORK NY 100658446

9B. DATED (SEE ITEM 11)

x

10A MODIFICATION OF CONTRACT/ORDER NO.
HHSO100201800019C

10B. DATED (SEE ITEM 13)
09/10/2018

CODE 1385150

FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

□ The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers □ is extended, □ is not extended.
Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following
methods: (a) By completing Items 8 and 15, and returning      copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of
the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers.
FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO
THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer
already submitted , such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to
the solicitation and this amendment, and is received prior to the opening hour and date specified.
12. ACCOUNTING AND APPROPRIATION DATA (If required)
2019.1990051.25505

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS
DESCRIBED IN ITEM 14.

CHECK ONE

A THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN

ITEM 14 ARE MADE IN THE CONTRACT ORDER NO. IN ITEM 10A.

X

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE

CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT
TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:
D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor ☒ is not ☐ is required to sign this document and return    copies to the issuing office.
14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where
feasible.)
Tax ID Number: 13-3864870
UEI: VJRNRTSL22K4
The purpose of this modification is to correct the Period of Performance for CLIN0007 to align with IPP.

All other terms and conditions remain unchanged.
OTA: N
Discount Terms: HHS NET 30P
Appr. Yr.: 2019 CAN: 1990051 Object Class: 25505
Period of Performance: 01/01/2020 to 09/09/2028
Continued ...
Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full
force and effect.
15A. NAME AND TITLE OF SIGNER (Type or print)
Dennis Hruby

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type
or print)
JONATHAN F. GONZALEZ
16B. UNITED STATES OF AMERICA
/s/ Jonathan F. Gonzalez 
(Signature of Contracting Officer)

16C. DATE SIGNED
2/9/2024

15B CONTRACTOR/OFFEROR
/s/ Dennis Hruby
(Signature of person authorized to sign)

15C. DATE SIGNED
2/9/2024

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Previous edition unusable

STANDARD FORM 30 (REV. 11/2016)
Prescribed by GSA FAR (48 CFR) 53.243

CONTINUATION
SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED
HHSO100201800019C/P00015

NAME OF OFFICER OR CONTRACTOR
SIGA TECHNOLOGIES, INC. 1385150

ITEM NO.
(A)

SUPPLIES/SERVICES
(B)

PAGE OF

2

2

QUANTITY
(C)

UNIT
(D)

AMOUNT
(F)

UNIT
PRICE
(E)

Change Item 2 to read as follows(amount shown is the obligated amount) :

2

ASPR-19-00662 -- Exercise of Option CLIN 0007 to SIGA Technologies Inc. for Phase IV
post-marketing commitment studies under contract HHSO100201899919C
Period of Performance: [***]

0.00

NSN 7540-01-152-8067

OPTIONAL
FORM 336
(4-86)
Sponsored
by GSA
FAR (48
CFR)
53.110

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-218507, 333-183101, and 333-167329) of SIGA
Technologies, Inc. of our report dated March 12, 2024 relating to the financial statements and the effectiveness of internal control over financial reporting,
which appears in this Form 10-K.

Exhibit 23.1

/s/ PRICEWATERHOUSECOOPERS LLP
Florham Park, New Jersey
March 12, 2024

 
 
 
 
 
 
Exhibit 31.1

I, Diem Nguyen, Ph.D., certify that:

Certification by Chief Executive Officer Pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002

I have reviewed this Annual Report on Form 10-K of SIGA Technologies, Inc.;

1.
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the

4.

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-
15(f)) for the registrant and have:

(a) Designed  such  disclosure  controls  and  procedures,  or  caused  such  disclosure  controls  and  procedures  to  be  designed  under  our
supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us
by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under
our  supervision,  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;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most
recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably
likely to materially affect, the registrant’s internal control over financial reporting; and

5.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to
the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are

reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any  fraud,  whether  or  not  material,  that  involves  management  or  other  employees  who  have  a  significant  role  in  the  registrant’s

internal control over financial reporting.

Date: March 12, 2024

/s/ Diem Nguyen, Ph.D.
Diem Nguyen, Ph.D.
Chief Executive Officer

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 31.2

I, Daniel J. Luckshire, certify that:

Certification by Chief Financial Officer Pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002

I have reviewed this Annual Report on Form 10-K of SIGA Technologies, Inc.;

1.
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the

4.

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-
15(f)) for the registrant and have:

(a) Designed  such  disclosure  controls  and  procedures,  or  caused  such  disclosure  controls  and  procedures  to  be  designed  under  our
supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us
by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under
our  supervision,  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;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most
recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably
likely to materially affect, the registrant’s internal control over financial reporting; and

5.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to
the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are

reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any  fraud,  whether  or  not  material,  that  involves  management  or  other  employees  who  have  a  significant  role  in  the  registrant’s

internal control over financial reporting.

Date: March 12, 2024

/s/ Daniel J. Luckshire
Daniel J. Luckshire
Executive Vice President and
Chief Financial Officer

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.1

In connection with the Annual Report of SIGA Technologies, Inc. (the “Company”) on Form 10-K for the period ended December 31, 2023 as
filed  with  the  Securities  and  Exchange  Commission  on  the  date  hereof  (the  “Report”),  I,  Diem  Nguyen,  Ph.  D.,  Chief  Executive  Officer  of  the
Company,  certify,  pursuant  to  18  U.S.C.  §  1350,  as  adopted  pursuant  to  Section  906  of  the  Sarbanes-Oxley  Act  of  2002,  that  to  the  best  of  my
knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Diem Nguyen, Ph.D.
Diem Nguyen, Ph.D.
Chief Executive Officer
March 12, 2024

 
 
 
 
 
 
 
 
 
 
 
 
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.2 

In connection with the Annual Report of SIGA Technologies, Inc. (the “Company”) on Form 10-K for the period ended December 31, 2023 as
filed  with  the  Securities  and  Exchange  Commission  on  the  date  hereof  (the  “Report”),  I,  Daniel  J.  Luckshire,  Executive  Vice  President  and  Chief
Financial Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to
the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Daniel J. Luckshire
Daniel J. Luckshire
Executive Vice President and Chief Financial Officer
March 12, 2024

 
 
 
 
 
 
 
 
 
 
 
 
 
SIGA TECHNOLOGIES, INC.

CLAWBACK POLICY

Exhibit 97.1

The Compensation Committee (the “Committee”) of the Board of Directors (the “Board”) of SIGA Technologies, Inc. (the “Company”) believes that it
is appropriate for the Company to adopt this Clawback Policy (the “Policy”) to be applied to the Executive Officers of the Company and adopts this Policy
November 15, 2023 to be effective as of the Effective Date.

1. Definitions

For purposes of this Policy, the following definitions shall apply:

a)

“Company Group” means the Company and each of its Subsidiaries, as applicable.

b)

“Covered Compensation” means any Incentive-Based Compensation granted, vested or paid to a person who served as an Executive Officer at
any time during the performance period for the Incentive-Based Compensation and that was Received (i) on or after the Effective Date, (ii)
after the person became an Executive Officer and (iii) at a time that the Company had a class of securities listed on a national securities
exchange or a national securities association.

c)

“Effective Date” means October 2, 2023.

d)

“Erroneously Awarded Compensation” means the amount of Covered Compensation granted, vested or paid to a person during the fiscal
period when the applicable Financial Reporting Measure relating to such Covered Compensation was attained that exceeds the amount of
Covered Compensation that otherwise would have been granted, vested or paid to the person had such amount been determined based on the
applicable Restatement, computed without regard to any taxes paid (i.e., on a pre-tax basis). For Covered Compensation based on stock price
or total shareholder return, where the amount of Erroneously Awarded Compensation is not subject to mathematical recalculation directly
from the information in a Restatement, the Committee will determine the amount of such Covered Compensation that constitutes Erroneously
Awarded Compensation, if any, based on a reasonable estimate of the effect of the Restatement on the stock price or total shareholder return
upon which the Covered Compensation was granted, vested or paid and the Committee shall maintain documentation of such determination
and provide such documentation to the Nasdaq.

e)

“Exchange Act” means the U.S. Securities Exchange Act of 1934.

f)

g)

“Executive Officer” means each “officer” of the Company as defined under Rule 16a-1(f) under Section 16 of the Exchange Act, which shall
be deemed to include any individuals identified by the Company as executive officers pursuant to Item 401(b) of Regulation S-K under the
Exchange Act. Both current and former Executive Officers are subject to the Policy in accordance with its terms.

“Financial Reporting Measure” means (i) any measure that is determined and presented in accordance with the accounting principles used in
preparing the Company’s financial statements, and any measures derived wholly or in part from such measures and may consist of GAAP or
non-GAAP financial measures (as defined under Regulation G of the Exchange Act and Item 10 of Regulation S-K under the Exchange Act),
(ii) stock price or (iii) total shareholder return. Financial Reporting Measures may or may not be filed with the SEC and may be presented
outside the Company’s financial statements, such as in Managements’ Discussion and Analysis of Financial Conditions and Result of
Operations or in the performance graph required under Item 201(e) of Regulation S-K under the Exchange Act.

h)

“Home Country” means the Company’s jurisdiction of incorporation.

i)

j)

“Incentive-Based Compensation” means any compensation that is granted, earned or vested based wholly or in part upon the attainment of a
Financial Reporting Measure.

“Lookback Period” means the three completed fiscal years (plus any transition period of less than nine months that is within or immediately
following the three completed fiscal years and that results from a change in the Company’s fiscal year) immediately preceding the date on
which the Company is required to prepare a Restatement for a given reporting period, with such date being the earlier of: (i) the date the
Board, a committee of the Board, or the officer or officers of the Company authorized to take such action if Board action is not required,
concludes, or reasonably should have concluded, that the Company is required to prepare a Restatement, or (ii) the date a court, regulator or
other legally authorized body directs the Company to prepare a Restatement. Recovery of any Erroneously Awarded Compensation under the
Policy is not dependent on if or when the Restatement is actually filed.  

k)

“Nasdaq” means the Nasdaq Stock Market.

l)

“Received”: Incentive-Based Compensation is deemed “Received” in the Company’s fiscal period during which the Financial Reporting
Measure specified in or otherwise relating to the Incentive-Based Compensation award is attained, even if the grant, vesting or payment of the
Incentive-Based Compensation occurs after the end of that period.

m) “Restatement” means a required accounting restatement of any Company financial statement due to the material noncompliance of the

Company with any financial reporting requirement under the securities laws, including (i) to correct an error in previously issued financial
statements that is material to the previously issued financial statements (commonly referred to as a “Big R” restatement) or (ii) to correct an
error in previously issued financial statements that is not material to the previously issued financial statements but that would result in a
material misstatement if the error were corrected in the current period or left uncorrected in the current period (commonly referred to as a
“little r” restatement). Changes to the Company’s financial statements that do not represent error corrections under the then-current relevant
accounting standards will not constitute Restatements. Recovery of any Erroneously Awarded Compensation under the Policy is not
dependent on fraud or misconduct by any person in connection with the Restatement.

n)

“SEC” means the U.S. Securities and Exchange Commission.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
o)

“Subsidiary” means any domestic or foreign corporation, partnership, association, joint stock company, joint venture, trust or unincorporated
organization “affiliated” with the Company, that is, directly or indirectly, through one or more intermediaries, “controlling”, “controlled
by” or “under common control with”, the Company. “Control” for this purpose means the possession, direct or indirect, of the power to direct
or cause the direction of the management and policies of such person, whether through the ownership of voting securities, contract or
otherwise.

2. Recoupment of Erroneously Awarded Compensation

In the event of a Restatement, any Erroneously Awarded Compensation Received during the Lookback Period prior to the Restatement (a) that is then-

outstanding but has not yet been paid shall be automatically and immediately forfeited and (b) that has been paid to any person shall be subject to
reasonably prompt repayment to the Company Group in accordance with Section 3 of this Policy. The Committee must pursue (and shall not have the
discretion to waive) the forfeiture and/or repayment of such Erroneously Awarded Compensation in accordance with Section 3 of this Policy, except as
provided below.

Notwithstanding the foregoing, the Committee (or, if the Committee is not a committee of the Board responsible for the Company’s executive

compensation decisions and composed entirely of independent directors, a majority of the independent directors serving on the Board) may determine not
to pursue the forfeiture and/or recovery of Erroneously Awarded Compensation from any person if the Committee determines that such forfeiture and/or
recovery would be impracticable due to any of the following circumstances: (i) the direct expense paid to a third party (for example, reasonable legal
expenses and consulting fees) to assist in enforcing the Policy would exceed the amount to be recovered (following reasonable attempts by the Company
Group to recover such Erroneously Awarded Compensation, the documentation of such attempts, and the provision of such documentation to the Nasdaq),
(ii) pursuing such recovery would violate the Company’s Home Country laws adopted prior to November 28, 2022 (provided that the Company obtains an
opinion of Home Country counsel acceptable to the Nasdaq that recovery would result in such a violation and provides such opinion to the Nasdaq), or (iii)
recovery would likely cause any otherwise tax-qualified retirement plan, under which benefits are broadly available to employees of Company Group, to
fail to meet the requirements of 26 U.S.C. 401(a)(13) or 26 U.S.C. 411(a) and regulations thereunder.

3. Means of Repayment

In the event that the Committee determines that any person shall repay any Erroneously Awarded Compensation, the Committee shall provide written
notice to such person by email or certified mail to the physical address on file with the Company Group for such person, and the person shall satisfy such
repayment in a manner and on such terms as required by the Committee, and the Company Group shall be entitled to set off the repayment amount against
any amount owed to the person by the Company Group, to require the forfeiture of any award granted by the Company Group to the person, or to take any
and all necessary actions to reasonably promptly recoup the repayment amount from the person, in each case, to the fullest extent permitted under
applicable law, including without limitation, Section 409A of the U.S. Internal Revenue Code and the regulations and guidance thereunder. If the
Committee does not specify a repayment timing in the written notice described above, the applicable person shall be required to repay the Erroneously
Awarded Compensation to the Company Group by wire, cash or cashier’s check no later than thirty (30) days after receipt of such notice.

4. No Indemnification

No person shall be indemnified, insured or reimbursed by the Company Group in respect of any loss of compensation by such person in accordance

with this Policy, nor shall any person receive any advancement of expenses for disputes related to any loss of compensation by such person in accordance
with this Policy, and no person shall be paid or reimbursed by the Company Group for any premiums paid by such person for any third-party insurance
policy covering potential recovery obligations under this Policy. For this purpose, “indemnification” includes any modification to current compensation
arrangements or other means that would amount to de facto indemnification (for example, providing the person a new cash award which would be
cancelled to effect the recovery of any Erroneously Awarded Compensation). In no event shall the Company Group be required to award any person an
additional payment if any Restatement would result in a higher incentive compensation payment.

5. Miscellaneous

This Policy generally will be administered and interpreted by the Committee, provided that the Board may, from time to time, exercise discretion to
administer and interpret this Policy, in which case, all references herein to “Committee” shall be deemed to refer to the Board. Any determination by the
Committee with respect to this Policy shall be final, conclusive and binding on all interested parties. Any discretionary determinations of the Committee
under this Policy, if any, need not be uniform with respect to all persons, and may be made selectively amongst persons, whether or not such persons are
similarly situated.

This Policy is intended to satisfy the requirements of Section 954 of the Dodd-Frank Wall Street Reform and Consumer Protection Act, as it may be
amended from time to time, and any related rules or regulations promulgated by the SEC or the Nasdaq, including any additional or new requirements that
become effective after the Effective Date which upon effectiveness shall be deemed to automatically amend this Policy to the extent necessary to comply
with such additional or new requirements.

The provisions in this Policy are intended to be applied to the fullest extent of the law. To the extent that any provision of this Policy is found to be
unenforceable or invalid under any applicable law, such provision will be applied to the maximum extent permitted and shall automatically be deemed
amended in a manner consistent with its objectives to the extent necessary to conform to applicable law. The invalidity or unenforceability of any provision
of this Policy shall not affect the validity or enforceability of any other provision of this Policy. Recoupment of Erroneously Awarded Compensation under
this Policy is not dependent upon the Company Group satisfying any conditions in this Policy, including any requirements to provide applicable
documentation to the Nasdaq.

The rights of the Company Group under this Policy to seek forfeiture or reimbursement are in addition to, and not in lieu of, any rights of recoupment,
or remedies or rights other than recoupment, that may be available to the Company Group pursuant to the terms of any law, government regulation or stock
exchange listing requirement or any other policy, code of conduct, employee handbook, employment agreement, equity award agreement, or other plan or
agreement of the Company Group.

6. Amendment and Termination

To the extent permitted by, and in a manner consistent with applicable law, including SEC and Nasdaq rules, the Committee may terminate, suspend or

amend this Policy at any time in its discretion.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7. Successors

This Policy shall be binding and enforceable against all persons and their respective beneficiaries, heirs, executors, administrators or other legal

representatives with respect to any Covered Compensation granted, vested or paid to or administered by such persons or entities.

 
 
 
 
 
SIGA TECHNOLOGIES, INC.

CLAWBACK POLICY

ACKNOWLEDGMENT, CONSENT AND AGREEMENT

I acknowledge that I have received and reviewed a copy of the SIGA Technologies, Inc. Clawback Policy (as may be amended from time to time, the
“Policy”) and I have been given an opportunity to ask questions about the Policy and review it with my counsel. I knowingly, voluntarily and irrevocably
consent to and agree to be bound by and subject to the Policy’s terms and conditions, including that I will return any Erroneously Awarded Compensation
that is required to be repaid in accordance with the Policy. I further acknowledge, understand and agree that (i) the compensation that I receive, have
received or may become entitled to receive from the Company Group is subject to the Policy, and the Policy may affect such compensation and (ii) I have
no right to indemnification, insurance payments or other reimbursement by or from the Company Group for any compensation that is subject to recoupment
and/or forfeiture under the Policy. Capitalized terms used but not defined herein have the meanings set forth in the Policy.

Signed:                  _________________________________________

Print Name:          _________________________________________

Date:                  _________________________________________