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SIGA Technologies, Inc.

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FY2022 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, 2022
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. ☒

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

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, 2022 as reported on The Nasdaq Global Market was approximately $549,866,712.

As of February 15, 2023, the registrant had outstanding 72,201,169 shares of common stock.

DOCUMENTS INCORPORATED BY REFERENCE

The following document is incorporated herein by reference:

Document
Proxy Statement for the Company’s 2023 Annual
Meeting of Stockholders

Parts Into Which Incorporated
Part III

 
 
 
 
 
 
 
 
 
 
 
Table of Contents

PART I
Item 1.
Item 1A.
Item 1B.
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
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 the U.S. Strategic
National Stockpile ("Strategic Stockpile"), 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,” “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 SIGA or its collaborators will not obtain appropriate or necessary governmental approvals
to  market  these  or  other  potential  products  or  uses,  (vii)  the  risk  that  SIGA  may  not  be  able  to  secure  or  enforce  sufficient  legal  rights  in  its  products,
including intellectual property protection, (viii) 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, (ix) 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, (x) the risk that the volatile and competitive nature of the biotechnology industry may hamper SIGA’s efforts to develop or market its products,
(xi)  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,  (xii)  the  effect  of  federal,  state,  and  foreign  regulation,  including  drug  regulation  and  international  trade  regulation,  on  SIGA’s
businesses,  (xiii)  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, (xiv) 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 (xv) 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 has recently completed enrollment of an immunogenicity trial and is planning to meet target enrollment for an expanded safety trial in March of
2023.  Provided unblinded results from these trials are supportive of a regulatory submission, the Company expects to commence in 2023 the preparation of
a supplemental New Drug Application (“Supplemental NDA”) for a smallpox PEP indication for oral TPOXX®, targeting early 2024 for its submission to
the FDA.

In  connection  with  the  global  response  to  an  mpox  outbreak,  a  series  of  observational  and  randomized,  placebo-controlled  clinical  trials  were
initiated, starting in the third quarter of 2022, to assess the safety and efficacy of TPOXX® in participants with mpox.  The first three randomized, placebo-
controlled clinical trials to be launched were in the United States, United Kingdom and the Democratic Republic of Congo ("DRC"). These randomized
clinical trials are now enrolling patients to collect data on the potential benefits of using TPOXX® as an antiviral treatment for active mpox disease. 

Study of Tecovirimat for Human Monkeypox Virus (STOMP; A5418) is a U.S.-based clinical trial sponsored by the National Institute of Allergy
and Infectious Diseases ("NIAID"), part of the National Institutes of Health. The NIAID-funded AIDS Clinical Trials Group is leading the study, which
may  later  expand  to  international  sites.  Study  investigators  aim  to  enroll  more  than  500  participants,  including  children  and  those  who  are  pregnant  or
breastfeeding, at clinical research sites. The trial will also include an open label arm that will include children, pregnant/breastfeeding individuals and those
who are immunocompromised or have severe mpox disease.

PLATINUM is a U.K.-based clinical trial commissioned and funded by the National Institute for Health Care and Research. The trial is  led  by

researchers at Oxford University and aims to recruit at least 500 participants, including children weighing ≥13 kg, across the U.K.

PALM 007 is a DRC-based clinical trial sponsored by NIAID and Institute National de Recherche Biomédicale. Study investigators aim to enroll

more than 450 participants, including children weighing ≥3 kg and women who are pregnant or breastfeeding, at clinical sites in the DRC.

The  Company  may  be  able  to  use  data  from  the  trials  noted  above  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 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®.  Additionally,  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,  2022,  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  of  five  years,  approximately  $268.9  million  of
payments are related to exercised options and up to approximately $281.9 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, including during the base period of
performance. 

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 20,000 courses 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, 2022, 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 $18.8 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  $268.9  million.  There  are  exercised  options  for  the
following  activities:  payments  up  to  $11.2  million  for  the  procurement  of  raw  materials  used  in  the  2020  manufacture  of  certain  courses  of  oral
TPOXX®; payments up to $213.9 million for the delivery of up to 726,140 courses of oral TPOXX®; payments up to $25.6 million for the manufacture of
courses of IV FDP, of which $10.2 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, 2022, the Company had received $225.1 million for the delivery (and related procurement of raw materials) of oral
TPOXX®  to  the  Strategic  Stockpile;  $10.2  million  for  the  completed  manufacture  of  IV  BDS;  and  $7.3  million  in  connection  with  post-marketing
activities for oral and IV TPOXX®.

Unexercised options specify potential payments up to approximately $281.9 million in total (if all such options are exercised). There are options
for the following activities: payments of up to $225.1 million for the delivery of oral TPOXX® to the Strategic Stockpile; payments of up to $51.2 million
for the manufacture of courses of IV FDP, of which up to $20.5 million of payments would be paid upon the manufacture of IV BDS to be used in the
manufacture of IV FDP; and payments of up to approximately $5.6 million for supportive procurement activities.

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  64,000  courses  of  IV  TPOXX®;  and  three  separate  IV  FDP  Options,  each
providing  for  64,000  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  one  of  the  three  IV  BDS  options  and  one  of  the  three  IV  FDP  options,  both  of  which  were  exercised
simultaneously  in  2022.  If  BARDA  decides  to  only  exercise  the  remaining  IV  BDS  Options,  then  the  Company  would  receive  payments  up  to  $20.5
million; alternatively, if BARDA decides to exercise all the remaining IV BDS Options and IV FDP Options, then the Company would receive payments
up to $51.2 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
64,000 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 IV FDP Options were 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
approximately 920,000 courses of smallpox antiviral treatment would need to be delivered to the Strategic Stockpile in 2023 and 2024 in order to 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 approximately $3.8 million of oral TPOXX®.  In the second quarter of 2022, the
Company delivered and recognized revenue of $3.6 million for the delivery of oral TPOXX® to the DoD, 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 and recognized the related revenue in September 2022. 

On September 28, 2022, the Company and the DoD signed a new procurement contract ("DoD Contract #2"). The DoD Contract #2 includes a
firm commitment for the DoD to procure approximately $5.2 million of oral TPOXX®, and an option, exercisable at the sole discretion of the DoD for the
procurement of approximately $5.5 million of oral TPOXX®. 

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International Procurement Contracts

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 is for Canada and approximately $38 million is for jurisdictions in Europe, Asia-Pacific,
and  the  Middle  East.    Additionally,  the  contract  with  the  Canadian  Department  of  National  Defence  ("CDND")  has  an  option  until  March  31,  2024,
exercisable at the sole discretion of CDND, for the purchase of up to an additional $6 million of oral TPOXX®. With respect to the $77 million of firm
commitment  orders  that  were  received  this  year,  approximately  $71  million  of  oral  TPOXX®  was  delivered  and  recorded  as  revenue  in  2022,  and  the
remaining  order  is  expected  to  be  fulfilled  by  July  31,  2023.  Through  an  International  Promotion  Agreement  (defined  and  discussed  below),  Meridian
Medical Technologies, Inc. (“Meridian”) is the counterparty to international contracts under which orders are placed for the purchase of oral TPOXX®. 
The  Public  Health  Agency  of  Canada  (“PHAC”)  and  the  CDND  are  among  the  contracting  parties  for  the  purchase  of  oral  TPOXX®  (see  below  for  a
summary description of these contracts). 

On January 13, 2021, PHAC awarded a contract to Meridian (the “PHAC Contract”) for the purchase of up to approximately $33 million of oral
TPOXX® (tecovirimat) within five years. In March 2022 and July 2022, PHAC executed amendments in which total procurement of oral TPOXX® under
the  PHAC  Contract  was  increased  to  an  amount  of  approximately  $45  million.  Prior  to  2022,  approximately  $10  million  of  oral  TPOXX®  had  been
ordered  and  delivered  to  PHAC.  During  2022,  all  remaining  amounts  under  the  PHAC  Contract  of  approximately  $35  million  of  oral  TPOXX®
were delivered to PHAC and recognized as revenue. 

On April 3, 2020, the Company announced that the CDND awarded a contract (the "Canadian Military Contract") to Meridian, pursuant to which
the CDND would purchase up to approximately $14 million of oral TPOXX® over four years in an option-based contract. Prior to 2022, approximately
$4  million  of  oral  TPOXX®  had  been  ordered  and  delivered  to  the  CDND.  In  2022,  approximately  $4  million  of  oral  TPOXX®  was  delivered  and
recognized as revenue under this contract, leaving approximately $6 million of unexercised options, exercisable at the sole discretion of CDND, remaining
under this contract.

The above-listed contract awards were coordinated between SIGA and Meridian under the international promotion agreement (as amended, the
"International  Promotion  Agreement")  that  has  an  effective  date  of  May  31,  2019.  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.

International Promotion Agreement

Under the terms of the International Promotion Agreement, which has an effective date of May 31, 2019 and 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 valued at a total of $ 19.5 million, with an initial award of $ 12.4 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").  In
subsequent  modifications,  the  DoD  increased  the  scope  and  the  available  funding  under  the  PEP  Label  Expansion  R&D  Contract  to  approximately
$27 million. The period of performance for this contract, as modified, terminates on January 31, 2025. 

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, 2022, 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 September 30, 2023. 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 is currently scheduled to expire upon the earlier of: (i) September
30, 2023, or (ii) the fulfillment of delivery obligations under the 19C BARDA Contract. As such, since the delivery obligations under the 19C BARDA
Contract have not been fulfilled yet, the contract term continues. At the end of the above-mentioned contract term, 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, 2024, 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, 2024.  The agreement can be terminated earlier than March 1, 2024 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 has an initial term that ends 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.

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, 2022, 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 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,  2023,  we  had  39  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 10, 2023, the TPOXX® patent portfolio has seven patent families consisting of 29 U.S. utility patents, 101 issued foreign patents, two U.S. utility
patent applications, and 23 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

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
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

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
March 14, 2019
April 23, 2027
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 14, 2033
August 10, 2017
December 7, 2018 August 14, 2033
August 14, 2033
August 2, 2019

10

 
 
Table of Contents

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

Japan
Japan
Japan

Brazil

Brazil

CN 2011800245893China

CN 2013800429237China
CN 2017103075357China
CN 2014800653387China

CA 2529761

Canada

CA 2685153

Canada

CA 2866037

CA 2807528
CA 2966466
CA 2882506

CA 2793533

CA 2917199
CA 2930461

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

Israel

Israel
Israel
Israel

Israel

Israel

Israel

Israel
Israel

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

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

February 15, 2037

November 14, 2034

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
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
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

August 26, 2015 March 23, 2031

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

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
August 25, 2020
April 23, 2027
October 20, 2020 August 14, 2033

February 26, 2019 March 23, 2031

August 31, 2021
August 16, 2022

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

July 11, 2034

11

 
 
Table of Contents

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

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

France

France
France
France
France
France
France

GB 1638938

United Kingdom

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
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
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

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

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, 2024

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

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

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

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

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  25  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.

14

 
 
 
 
 
 
 
 
 
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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;

Code of Ethics and Business Conduct;

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

Any of the above documents can also be obtained in print by any shareholder upon request to the Secretary, SIGA Technologies, Inc., 31 E 62nd Street, 5th
floor, New York, New York 10065.

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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 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,  2022,  more  than  85%  of  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  fixed-price  arrangements.  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 contracts after the 19C BARDA Contract to
substantially maintain or expand the 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;  

17

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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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 BARDA contracts or may not be able to commercialize such indications other than through existing sales to BARDA, 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 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  may  depend  in  part  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, 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 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.  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.

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 are subject to 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. If the foregoing were to occur, there could be an adverse impact on 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.

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.  While  the  IRA  is  still  subject  to  rulemaking  (with  more  information  to  come  via  guidance
documents from the responsible federal agencies), the IRA, as written, will, among other changes, give HHS the ability and authority to directly negotiate
with manufacturers the price that Medicare will pay for certain high-priced drugs. The IRA will also require 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). At this time, we
cannot predict the implications the IRA provisions will have on our business. 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 issues from
trading securities on United States exchanges for violations of the FCPA’s accounting provisions.

We could incur net losses in the future 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, which may not be sufficient if BARDA 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.  If  cash  flows  from  the  19C  BARDA  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.

Additionally, we may rely on a third-party provider, or multiple providers, to store or transport a portion of the stockpile of IV TPOXX® under the

19C BARDA Contract, entrusting such vendor or vendors with the care and handling of a substantial portion of IV TPOXX® inventory.

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, for example as a result of the COVID-19 pandemic, 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 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, for example as a
result  of  disruption  resulting  from  the  COVID-19  pandemic,  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 10, 2023, the TPOXX® patent portfolio has seven patent families consisting of 29 U.S. utility patents, 101 issued foreign patents, two U.S. utility
patent applications, and 23 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,  2023,  directors,  executive  officers  and  principal  stockholders  (excluding  institutional  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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Our stock repurchase program could affect the price of our common stock and increase volatility and may be suspended or terminated at any time,
which may result in a decrease in the trading price of our common stock.

On  August  2,  2021,  our  Board  of  Directors  authorized  a  new  share  repurchase  program  for  up  to  $50  million  of  our  common  stock  through
December 31, 2023. This stock repurchase program does not obligate the Company to repurchase any dollar amount or number of shares of our common
stock and may be suspended or discontinued at any time, which could cause the market price of our common stock to decline. Repurchases pursuant to our
stock repurchase program could affect the price of our common stock and increase its volatility. Important factors that could cause us to limit, suspend or
delay the Company’s stock repurchases, without prior notice, and that could in any event impact management’s exercise of its discretion as to the amount
and timing of such repurchases, include 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. The existence of
our  stock  repurchase  program  could  cause  the  price  of  our  common  stock  to  be  higher  than  it  would  be  in  the  absence  of  such  a  program  and  could
potentially  reduce  the  market  liquidity  for  our  common  stock. Additionally,  repurchases  under  our  stock  repurchase  program  would  diminish  our  cash
reserves, which could impact our ability to pursue other opportunities, further develop our technology or adversely affect our operating results. There can
be no assurance that any stock repurchases would enhance stockholder value because the market price of our common stock may decline below the levels
at  which  we  repurchased  such  shares. Any  failure  to  repurchase  shares  could  negatively  impact  our  reputation,  investor  confidence  in  us  and  our  stock
price.

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 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 has caused significant societal and economic disruption. The continuing direct and indirect impacts of the pandemic are
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.

As of the filing date of this report, the Company has not identified or been notified by government customers of impediments to the continued full
performance  of  their  government  contracts.  With  regard  to  day-to-day  operations,  the  COVID-19  pandemic,  and  the  secondary  effects  of  the
pandemic, have at times slowed the pace of execution of government contracts as well as new contract generation. Additionally, the COVID-19 pandemic,
and the secondary effects of the pandemic have increased the risk of delays in connection with a broad range of operational activities, including: supply
chain  procurement  of  raw  materials  and  manufacturing;  and  certain  research  and  development  activities,  such  as  those  that  involve  clinical  trials.
Furthermore, the pandemic and related secondary effects could result in a slower pace of future product deliveries if there are shortages or delays in the
receipt by the supply chain of raw materials or supplies, or if labor shortages become more acute.  While the Company does not currently expect such
delays  to  have  a  material  adverse  impact  on  the  financial  condition  of  the  Company  or  its  long-term  operating  performance,  and  while  the  COVID-19
pandemic has not adversely affected the liquidity position of the Company, the Company cannot give assurances as to the full extent of the impact at this
time.

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
ongoing COVID-19 pandemic has 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.  The  Board  has  initiated  a  search  for  Dr.  Gomez’s  successor,  and  Dr.  Gomez  is  expected  to  remain  in  his  current  role  as  Chief
Executive  Officer  until  his  successor  commences  service  as  Chief  Executive  Officer  of  the  Company.  The  search  for  and  transition  to  a  new  Chief
Executive Officer may result in disruptions to our business and uncertainty among our customers, employees and investors, 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, are vulnerable to
damage from computer viruses, malware, natural disasters, terrorism, war, telecommunication and electrical failures, cyber-attacks or cyber-intrusions over
the Internet, attachments to emails, 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. 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, 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.

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Item 1B. Unresolved Staff Comments

None.

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.

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 28 holders of record as of February 15, 2023. 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.”

Issuer Purchases of Equity Securities

Period
October 1, 2022 to October 31, 2022
November 1, 2022 to November 30, 2022
December 1, 2022 to December 31, 2022
Total

Total Number
of Shares
Purchased

Average Price
Paid per Share    

-    $
88,705     
260,252     
348,957    $

-     
9.22     
7.83     
8.19     

Total Number
of Shares
Purchased as
Part of
Publicly
Announced
Programs

-    $
88,705     
260,252     
348,957     

Dollar Value
of Shares That
May Yet Be
Purchased
Under the
Programs
35,325,830 
34,507,731 
32,469,204 

On March 5, 2020, the Company announced that the Board of Directors authorized a share repurchase program under which the Company may
repurchase, from time to time, up to an aggregate of $50 million of the Company’s common stock through December 31, 2021. This program has been
fulfilled with the maximum amount being used to repurchase shares.

On  August  5,  2021,  the  Company  announced  that  the  Board  of  Directors  authorized  an  additional  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 will depend 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.

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Performance Graph

The following line graph compares the cumulative total stockholder return through December 31, 2022, assuming reinvestment of dividends, by
an investor who invested $100 on December 31, 2017 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    $

163    $
96    $
91    $

98    $
130    $
113    $

150    $
187    $
142    $

155    $
227    $
141    $

152 
152 
126 

2017

2018

2019

2020

2021

2022

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, 2021 (filed with the SEC on March 3, 2022) for
additional discussion of our financial condition and results of operations for the year ended December 31, 2021, as well as our financial condition and
results of operations for the year ended December 31, 2021 compared to the year ended December 31, 2020. 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 has recently completed enrollment of an immunogenicity trial and is planning to meet target enrollment for an expanded safety trial in March of
2023.  Provided unblinded results from these trials are supportive of a regulatory submission, the Company expects to commence in 2023 the preparation of
a supplemental New Drug Application (“Supplemental NDA”) for a smallpox PEP indication for oral TPOXX®, targeting early 2024 for its submission to
the FDA.

In  connection  with  the  global  response  to  an  mpox  outbreak,  a  series  of  observational  and  randomized,  placebo-controlled  clinical  trials  were
initiated, starting in the third quarter of 2022, to assess the safety and efficacy of TPOXX® in participants with mpox.  The first three randomized, placebo-
controlled clinical trials to be launched were in the United States, United Kingdom and the Democratic Republic of Congo ("DRC"). These randomized
clinical trials are now enrolling patients to collect data on the potential benefits of using TPOXX® as an antiviral treatment for active mpox disease. 

Study of Tecovirimat for Human Monkeypox Virus (STOMP; A5418) is a U.S.-based clinical trial sponsored by the National Institute of Allergy
and Infectious Diseases ("NIAID"), part of the National Institutes of Health. The NIAID-funded AIDS Clinical Trials Group is leading the study, which
may  later  expand  to  international  sites.  Study  investigators  aim  to  enroll  more  than  500  participants,  including  children  and  those  who  are  pregnant  or
breastfeeding, at clinical research sites. The trial will also include an open label arm that will include children, pregnant/breastfeeding individuals and those
who are immunocompromised or have severe mpox disease.

PLATINUM is a U.K.-based clinical trial commissioned and funded by the National Institute for Health Care and Research. The trial is  led  by

researchers at Oxford University and aims to recruit at least 500 participants, including children weighing ≥13 kg, across the U.K.

PALM 007 is a DRC-based clinical trial sponsored by NIAID and Institute National de Recherche Biomédicale. Study investigators aim to enroll

more than 450 participants, including children weighing ≥3 kg and women who are pregnant or breastfeeding, at clinical sites in the DRC.

The  Company  may  be  able  to  use  data  from  the  trials  noted  above  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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Impact of COVID-19 Pandemic

The COVID-19 pandemic has caused significant societal and economic disruption. The continuing direct and indirect impacts of the pandemic are
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
("CMOs") that constitute our supply chain, with respect to risks and mitigating actions.

As of the filing date of this report, the Company has not identified or been notified by government customers of impediments to the continued full
performance  of  their  government  contracts.  With  regard  to  day-to-day  operations,  the  COVID-19  pandemic,  and  the  secondary  effects  of  the
pandemic, have at times slowed the pace of execution of government contracts as well as new contract generation. Additionally, the COVID-19 pandemic,
and the secondary effects of the pandemic have increased the risk of delays in connection with a broad range of operational activities, including: supply
chain  procurement  of  raw  materials  and  manufacturing;  and  certain  research  and  development  activities,  such  as  those  that  involve  clinical  trials.
Furthermore, the pandemic and related secondary effects could result in a slower pace of future product deliveries if there are shortages or delays in the
receipt by the supply chain of raw materials or supplies, or if labor shortages become more acute.  While the Company does not currently expect such
delays  to  have  a  material  adverse  impact  on  the  financial  condition  of  the  Company  or  its  long-term  operating  performance,  and  while  the  COVID-19
pandemic has not adversely affected the liquidity position of the Company, the Company cannot give assurances as to the full extent of the impact at this
time.

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®. Additionally, 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, 2022, 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 of five years, approximately $268.9 million of payments are related to exercised options and up to approximately $281.9 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, including during the base period of performance. 

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 20,000 courses 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, 2022, 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 $18.8 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  $268.9  million.  There  are  exercised  options  for  the
following  activities:  payments  up  to  $11.2  million  for  the  procurement  of  raw  materials  used  in  the  2020  manufacture  of  certain  courses  of  oral
TPOXX®; payments up to $213.9 million for the delivery of up to 726,140 courses of oral TPOXX®; payments up to $25.6 million for the manufacture of
courses of IV FDP, of which $10.2 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, 2022, the Company had received $225.1 million for the delivery (and related procurement of raw materials) of oral
TPOXX®  to  the  Strategic  Stockpile;  $10.2  million  for  the  completed  manufacture  of  IV  BDS,  which  has  been  recorded  as  deferred  revenue  as
of December 31, 2022; and $7.3 million in connection with post-marketing activities for oral and IV TPOXX®. 

Unexercised options specify potential payments up to approximately $281.9 million in total (if all such options are exercised). There are options
for the following activities: payments of up to $225.1 million for the delivery of oral TPOXX® to the Strategic Stockpile; payments of up to $51.2 million
for the manufacture of courses of IV FDP, of which up to $20.5 million of payments would be paid upon the manufacture of IV BDS to be used in the
manufacture of IV FDP; and payments of up to approximately $5.6 million for supportive procurement activities.

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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  64,000  courses  of  IV  TPOXX®;  and  three  separate  IV  FDP  Options,  each
providing  for  64,000  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  one  of  the  three  IV  BDS  options  and  one  of  the  three  IV  FDP  options,  both  of  which  were  exercised
simultaneously  in  2022.  If  BARDA  decides  to  only  exercise  the  remaining  IV  BDS  Options,  then  the  Company  would  receive  payments  up  to  $20.5
million; alternatively, if BARDA decides to exercise all the remaining IV BDS Options and IV FDP Options, then the Company would receive payments
up  to  $51.2  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  64,000  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 IV FDP Options were 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
approximately 920,000 courses of smallpox antiviral treatment would need to be delivered to the Strategic Stockpile in 2023 and 2024 in order to 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 approximately $3.8 million of oral TPOXX®.  In the second quarter of 2022, the
Company delivered and recognized revenue of $3.6 million for the delivery of oral TPOXX® to the DoD, 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 and recognized the related revenue in September 2022. 

On September 28, 2022, the Company and the DoD signed a new procurement contract ("DoD Contract #2"). The DoD Contract #2 includes a
firm commitment for the DoD to procure approximately $5.2 million of oral TPOXX®, and an option, exercisable at the sole discretion of the DoD for the
procurement of approximately $5.5 million of oral TPOXX®. 

International Procurement Contracts

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 is for Canada and approximately $38 million is for jurisdictions in Europe, Asia-Pacific,
and  the  Middle  East.    Additionally,  the  contract  with  the  Canadian  Department  of  National  Defence  ("CDND")  has  an  option  until  March  31,  2024,
exercisable at its sole discretion, for the purchase of up to an additional $6 million of oral TPOXX®. With respect to the $77 million of firm commitment
orders  that  were  received  this  year,  approximately  $71  million  of  oral  TPOXX®  was  delivered  and  recorded  as  revenue  in  2022,  and  the  remaining
order  is  expected  to  be  fulfilled  by  July  31,  2023.  Through  an  International  Promotion  Agreement  (defined  and  discussed  below),  Meridian  Medical
Technologies, Inc. (“Meridian”) is the counterparty to international contracts under which orders are placed for the purchase of oral TPOXX®.  The Public
Health  Agency  of  Canada  (“PHAC”)  and  the  CDND  are  among  the  contracting  parties  for  the  purchase  of  oral  TPOXX®  (see  below  for  a  summary
description of these contracts). 

On January 13, 2021, PHAC awarded a contract to Meridian (the “PHAC Contract”) for the purchase of up to approximately $33 million of oral
TPOXX® (tecovirimat) within five years. In March 2022 and July 2022, PHAC executed amendments in which total procurement of oral TPOXX® under
the  PHAC  Contract  was  increased  to  an  amount  of  approximately  $45  million.  Prior  to  2022,  approximately  $10  million  of  oral  TPOXX®  had  been
ordered  and  delivered  to  PHAC.  During  2022,  all  remaining  amounts  under  the  PHAC  Contract  of  approximately  $35  million  of  oral  TPOXX®
were delivered to PHAC and recognized as revenue. 

On April 3, 2020, the Company announced that the CDND awarded a contract (the "Canadian Military Contract") to Meridian, pursuant to which
the CDND would purchase up to approximately $14 million of oral TPOXX® over four years in an option-based contract. Prior to 2022, approximately
$4  million  of  oral  TPOXX®  had  been  ordered  and  delivered  to  the  CDND.  In  2022,  approximately  $4  million  of  oral  TPOXX®  was  delivered  and
recognized as revenue under this contract, leaving approximately $6 million of unexercised options, exercisable at the sole discretion of CDND, remaining
under this contract.

The above-listed contract awards were coordinated between SIGA and Meridian under the international promotion agreement (as amended, the
"International  Promotion  Agreement")  that  has  an  effective  date  of  May  31,  2019.  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.

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International Promotion Agreement

Under the terms of the International Promotion Agreement, which has an effective date of May 31, 2019 and 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 valued at a total of $19.5 million, with an initial award of $12.4 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").  In
subsequent  modifications,  the  DoD  increased  the  scope  and  the  available  funding  under  the  PEP  Label  Expansion  R&D  Contract  to  approximately
$27 million. The period of performance for this contract, as modified, terminates on January 31, 2025. As of December 31, 2022, remaining revenue to be
recognized in the future under the PEP Label Expansion R&D Contract is up to $6.4 million. Revenue from the performance obligation under the PEP
Label Expansion R&D Contract is 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 is 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.

In August 2022, the Inflation Reduction Act (“IRA”) and CHIPS and Science Act (“CHIPS Act”) were both enacted. This new legislation includes
the implementation of a new corporate alternative minimum tax, an excise tax on stock buybacks, and tax incentives for energy and climate initiatives,
among other provisions. The IRA and CHIPS Act did not have a material impact on our consolidated financial statements for the year ended December 31,
2022.

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, 2022 and 2021

Revenues from product sales and supportive services for the years ended December 31, 2022 and 2021 were $86.7 million and $126.8 million,
respectively. 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. Such
revenues for the year ended December 31, 2021 include $112.5 million of sales of oral TPOXX® to the U.S. Government under the 19C BARDA Contract
and $12.7 million of international sales of oral TPOXX®.

Revenues from research and development contracts and grants for the years ended December 31, 2022 and 2021, were $24.1 million and $6.9
million, respectively. Most of the increase of $17.2 million relates to an increase in clinical trial activity under the PEP Label Expansion R&D Contract in
connection with the PEP development program, and the remainder relates to an increase in R&D activity under the BARDA Contract.

Cost of sales and supportive services for the years ended December 31, 2022 and 2021 were $10.4 million and $16.6 million, respectively. 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®. Such costs in 2021 were primarily associated with the manufacture and delivery of
oral TPOXX® courses to the U.S. Government under the 19C BARDA Contract.

Selling, general and administrative expenses for the years ended December 31, 2022 and 2021 were $35.1 million and $18.0 million, respectively.
The increase of $17.1 million mostly reflects promotion fees to Meridian incurred in connection with international sales that substantially increased from
the comparable period in 2021.

Research and development expenses were $22.5 million for the year ended December 31, 2022, an increase of approximately $12.6 million from
the $9.9 million incurred during the year ended December 31, 2021. The increase is mostly attributable to an increase in direct vendor-related expenses
incurred in connection with an increase in activities under the PEP Label Expansion R&D Contract and the BARDA Contract. 

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  years  ended  December  31,  2022  and  December  31,  2021,  we  recorded  a  gain  of
approximately  $0.4  million  and  $0.1  million,  respectively,  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,  2022  and  2021  was  $1.0  million  and  $0.1  million,  respectively.  Other  income
primarily  reflects  interest  income  on  the  Company's  cash  and  cash  equivalent  balance.  The  increase  of  approximately  $0.9  million  is  driven  by  higher
interest rates for 2022 when compared to 2021. 

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.

For the year ended December 31, 2021, we recognized a tax provision of $19.9 million on pre-tax income of $89.3 million. Our effective tax rate
for the year ended December 31, 2021 was 22.2% and differs from the statutory rate of 21% primarily as a result of non-deductible executive compensation
under IRC Section 162(m), and state and local taxes.

Liquidity and Capital Resources

As of December 31, 2022, we had $98.8 million in cash and cash equivalents, compared with $103.1 million at December 31, 2021. 

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, 2022 and 2021 was $41.6 million and $11.5 million, respectively.  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. For the year ended December 31, 2021, the receipt of approximately $43.7 million in connection with U.S. Government and international sales of
oral TPOXX® was partially offset by net cash usage primarily related to manufacturing of inventory and customary operating activities.

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On December 31, 2022 and 2021, our accounts receivable balance was approximately $45.4 million (which includes approximately $40.9 million
of unbilled receivables) and $83.7 million, respectively. Our accounts receivable balance as of December 31, 2022 primarily reflects 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  are  expected  to  be  collected  during  the  first  or  second  quarter  of  2023.  Our  accounts  receivable  balance  as  of  December  31,
2021 primarily reflects deliveries of approximately $79.7 million of oral TPOXX® to the U.S. Government in December 2021, for which we received full
payment in January 2022.

Investing Activities

There  were  no  cash-related  investing  activities  for  the  year  ended  December  31,  2022.  For  the  year  ended  December  31,  2021,  we  used

$50,620 for capital expenditures. 

Financing Activities

Cash used in financing activities for the years ended December 31, 2022 and 2021 was $46.0 million and $26.2 million, respectively. 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. For the year ended December 31, 2021, $26.0 million of cash usage was associated with our repurchase of
approximately 3.8 million shares of common stock.

Future Cash Requirements

As  of  December  31,  2022,  we  have  outstanding  purchase  orders  associated  with  manufacturing  obligations  in  the  aggregate  amount  of

approximately $33.8 million.

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Item 7A. Quantitative and Qualitative Disclosures About Market Risk

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

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Item 8. Financial Statements and Supplementary Data

Index to the Consolidated Financial Statements

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

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

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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, 2022
and 2021, 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, 2022, 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, 2022, 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, 2022 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2022 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, 2022, 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 – Estimated Costs to Complete the Research and Development Services (“R&D”) Performance Obligations for the 19C BARDA and
PEP Label Expansion R&D Contracts

As discussed in Notes 2 and 3 to the consolidated financial statements, a portion of the Company’s revenue for the year ended December 31, 2022 was
derived from long-term contracts. For these contracts, all revenue associated with current research and development performance obligations for the 19C
BARDA and PEP Label Expansion R&D Contracts, which totaled approximately $6.2 million and $17.9 million, respectively, 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 costs incurred relative to total estimated costs. Under this method, progress is measured based on
the cost of resources consumed compared to the total estimated costs to completely satisfy the performance obligation. As disclosed by management, due to
the nature of the work required to be performed on many of the performance obligations, management’s estimation of total revenue and costs to satisfy the
obligations is complex, subject to many variables, and requires significant judgment. The incurred and estimated costs used in the measure of progress
include third-party services performed, direct labor hours, and material consumed.    

The principal considerations for our determination that performing procedures relating to revenue recognition – estimated costs to complete the R&D
performance obligations for the 19C BARDA and PEP Label Expansion R&D Contracts is a critical audit matter are the significant judgments by
management when determining the estimated costs to completely satisfy the performance obligations. This in turn led to significant auditor judgment,
subjectivity and effort in performing procedures and in evaluating the estimates of the costs to complete related to management’s estimates of total
forecasted costs.     

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, among others, evaluating and testing management’s process for determining the estimated costs to
completely satisfy each performance obligation for the 19C BARDA and PEP Label Expansion R&D Contracts, which included evaluating the
reasonableness of management’s estimates of total forecasted costs. Evaluating the reasonableness of management’s estimates of total forecasted costs
involved assessing management’s ability to reasonably estimate costs to complete the performance obligation by (i) comparing, on a test basis, the
underlying cost estimates to approved contracts or modifications; (ii) comparing, on a test basis, the underlying transaction price to original contracts or
modifications; and (iii) testing actual costs incurred and their eligibility for billing under the research and development performance obligations.   

/s/ PricewaterhouseCoopers LLP

Florham Park, New Jersey
March 2, 2023

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
Income tax payable

Total current liabilities

Warrant liability
Other liabilities

Total liabilities

Commitments and contingencies (Note 14)
Stockholders' equity

Common stock ($.0001 par value, 600,000,000 shares authorized, 72,675,190 and 73,543,602 issued
and outstanding at December 31, 2022 and December 31, 2021, respectively)
Additional paid-in capital
Accumulated deficit

Total stockholders' equity
Total liabilities and stockholders' equity

  December 31, 2022   

December 31,
2021

  $

  $

  $

  $

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    $
16,852,781     
1,309,672     
21,517,721     
—     
3,358,160     
24,875,881     

103,138,819 
83,650,450 
19,510,379 
2,453,444 
208,753,092 

2,365,957 
2,422,607 
898,334 
286,585 
214,726,575 

2,028,004 
9,252,812 
19,207,042 
30,487,858 
6,521,441 
3,402,869 
40,412,168 

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

7,354 
226,070,308 
(51,763,255)
174,314,407 
214,726,575 

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 (loss) from change in fair value of warrant liability
Loss on extinguishment of Term Loan
Interest expense
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

2022

2021

2020

  $

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

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

115,471,071 
9,488,233 
124,959,304 

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     

14,797,419 
14,722,325 
10,938,930 
40,458,674 
84,500,630 
(3,525,846)
(4,981,461)
(3,016,817)
532,085 
73,508,591 
(17,166,581)
56,342,010 
0.71 
0.71 
79,259,000 
79,437,306 

  $
  $
  $

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, 2022, 2021 and 2020

Common Stock

Shares

    Amount

    81,269,868    $

(4,628,473)    

    Additional      
Paid-In
Capital

    Accumulated     Comprehensive    Stockholders’ 
    Income (Loss)    

Equity

Deficit

    Accumulated      
Other

Total

8,127    $ 220,808,037    $ (123,032,408)   $
56,342,010     
(28,502,483)    

(463)    

—    $ 97,783,756 
56,342,010 
(28,502,946)

Balances, December 31, 2019
Net income
Repurchase of common stock
Issuance of common stock upon exercise of stock
options
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
Stock-based compensation
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

11,822     
177,876     

1     
18     

(1)    
(18)    

393,646     

40     

3,003,477     

(29,035)    

(3)    

(184,013)    
1,350,948     

    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)    

    72,675,190    $

(12,533)    

1,779,310     

(32,940,395)    

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

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

48

— 
— 

3,003,517 

(184,016)
1,350,948 
—    $ 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 

 
 
 
 
   
 
     
 
     
 
     
 
 
 
 
   
 
     
 
 
   
   
 
 
 
   
 
 
   
   
 
   
      
     
     
     
   
     
     
   
     
     
     
     
   
     
     
   
     
     
   
      
     
     
     
   
      
     
     
     
   
     
     
     
     
   
     
     
   
      
     
     
     
   
      
     
     
     
   
     
     
     
     
   
     
     
   
     
     
     
   
      
     
     
     
   
      
     
     
     
 
 
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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) loss on change in fair value of warrant liability
Stock-based compensation
Write down of inventory, net
Deferred income taxes (benefit) provision
Loss on extinguishment of Term Loan
Non-cash interest expense

Changes in assets and liabilities:

Accounts receivable
Inventory
Prepaid expenses and other assets
Accounts payable, accrued expenses and other liabilities
Income tax payable
Deferred 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
Repayment of Term Loan
Payment of dividend

Cash used in financing activities

Net decrease in cash and cash equivalents
Cash, cash equivalents and restricted cash 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

2022

2021

2020

33,904,806    $

69,450,766    $

56,342,010 

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

38,243,490     
(19,964,183)    
171,811     
2,066,074     
(17,897,370)    
6,816,450     
41,611,062     

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

(80,310,187)    
136,369     
48,963     
986,865     
18,287,487     
483,749     
11,494,636     

—     
—     

(50,620)    
(50,620)    

529,814 
3,525,846 
1,350,948 
— 
11,606,949 
4,981,461 
887,132 

827,733 
(8,009,992)
699,102 
(3,116,843)
912,462 
982,606 
71,519,228 

(15,501)
(15,501)

(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    $

(184,016)
(28,502,946)
(85,913,459)
— 
(114,600,421)
(43,096,694)
160,986,934 
117,890,240 

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

733,715    $
—    $
—    $
1,063,744    $

— 
3,003,517 
97,250 
3,718,581 

  $

  $
  $
  $
  $

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.

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

Restricted Cash and Cash Equivalents
Cash and cash equivalents held in restricted accounts were available to pay interest, fees and principal related to the Term Loan (see Note 7 for additional
information). As this Term Loan was repaid on March 13, 2020, the restricted accounts were closed in the second quarter of 2020. There was no restricted
cash or cash equivalents as of December 31, 2022 or 2021.

The following table reconciles cash, cash equivalents and restricted cash per the consolidated statements of cash flows to the consolidated balance sheet for
each respective period:

Cash and cash equivalents
Restricted cash - short-term
Restricted cash - long-term
Cash, cash equivalents and restricted cash

As of
December
31,
2019
  $ 65,249,072 
    95,737,862 
— 
  $160,986,934 

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,  2022  and  2021,  16%  and  98%,  respectively,  of  accounts
receivable represent receivables from the U.S. Government. At December 31, 2022, 84% of accounts receivable represent receivables from international
sales,  of  which  65%  of  accounts  receivable  are  from  sales  to  the  Canadian  government  and  20%  of  accounts  receivable  are  from  sales  to  a  European
government affiliated entity. 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, 2022 and 2021, 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.

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, 2022, the Company's active performance obligations, for the contracts outlined in Note 3, consist
of the following: six performance obligations relate to research and development services; and four relate to manufacture and delivery of product.

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

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

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

costs.

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

The  nature  of  the  work  required  to  be  performed  on  many  of  the  Company’s  performance  obligations  and  the  estimation  of  total  revenue  and  cost  at
completion are 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,  2022,  the  accounts  receivable  balance  in  the  balance  sheet  includes  approximately  $40.9  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,  2022,  the  Company  recognized  revenue  of  $2.9  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,  2022,  the  aggregate  amount  of  transaction  price  allocated  to  remaining
performance obligations was $66.4 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,  restricted  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. Common stock warrants which are classified as
liabilities are recorded at their fair market value as of each reporting period.

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.

The Company uses model-derived valuations where certain inputs are unobservable to third parties to determine the fair value of common stock warrants
on a recurring basis and classifies the liability-classified warrant as Level 3.

There were no transfers between levels of the fair value hierarchy during 2022 or 2021. As of December 31, 2022 and  December 31, 2021, the Company
had less than $0.1 million and approximately $0.1 million, respectively, of cash and cash equivalents classified as Level 1 financial instruments. As of 
December 31, 2022, the Company had approximately $40.5 million of cash equivalents classified as Level 2 financial instruments. There were no Level 2
financial instruments as of  December 31, 2021. 

The following table presents changes in the liability-classified warrant measured at fair value using Level 3 inputs:

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

Fair Value Measurements of Level 3
liability-classified warrant

  $

  $

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

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
There  have  been  no  new  accounting  pronouncements  not  yet  effective  that  have  significance,  or  potential  significance,  to  our  Consolidated  Financial
Statements.

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®.  Additionally,  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, 2022, 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 of five years, approximately $268.9 million of payments are related to exercised options and up to approximately $281.9 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, including during the base period of performance. 

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  20,000  courses  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, 2022, 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 $18.8 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  $268.9  million.  There  are  exercised  options  for  the  following
activities: payments up to $11.2 million for the procurement of raw materials used in the 2020 manufacture of certain courses of oral TPOXX®; payments
up to $213.9 million for the delivery of up to 726,140 courses of oral TPOXX®; payments up to $25.6 million for the manufacture of courses of IV FDP, of
which $10.2 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, 2022, the Company had received $225.1 million for the delivery (and related procurement of raw materials) of oral TPOXX® to the
Strategic  Stockpile;  $10.2  million  for  the  completed  manufacture  of  IV  BDS,  which  has  been  recorded  as  deferred  revenue  as  of  December  31,  2022;
and $7.3 million in connection with post-marketing activities for oral and IV TPOXX®. 

Unexercised options specify potential payments up to approximately $281.9 million in total (if all such options are exercised). There are options for the
following activities: payments of up to $225.1 million for the delivery of oral TPOXX® to the Strategic Stockpile; payments of up to $51.2 million for the
manufacture of courses of IV FDP, of which up to $20.5 million of payments would be paid upon the manufacture of IV BDS to be used in the manufacture
of IV FDP; and payments of up to approximately $5.6 million for supportive procurement activities.

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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  64,000  courses  of  IV  TPOXX®;  and  three  separate  IV  FDP  Options,  each
providing  for  64,000  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  one  of  the  three  IV  BDS  options  and  one  of  the  three  IV  FDP  options,  both  of  which  were  exercised
simultaneously  in  2022.  If  BARDA  decides  to  only  exercise  the  remaining  IV  BDS  Options,  then  the  Company  would  receive  payments  up  to
$20.5  million;  alternatively,  if  BARDA  decides  to  exercise  all  the  remaining  IV  BDS  Options  and  IV  FDP  Options,  then  the  Company  would  receive
payments up to $51.2 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 64,000 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, 2022 and 2021, the Company
recognized revenues of $6.2 million and $4.8 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, 2022 and 2021, was $7.2 million and $112.5 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 approximately $3.8 million of oral TPOXX®.  In the second quarter of 2022, the
Company delivered and recognized revenue of $3.6 million for the delivery of oral TPOXX® to the DoD, 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 and recognized the related revenue in September 2022. 

On September  28,  2022,  the  Company  and  the  DoD  signed  a  new  procurement  contract  ("DoD  Contract  #2").  The  DoD  Contract  #2  includes  a  firm
commitment  for  the  DoD  to  procure  approximately  $5.2  million  of  oral  TPOXX®,  and  an  option,  exercisable  at  the  sole  discretion  of  the  DoD  for  the
procurement of approximately $5.5 million of oral TPOXX®.

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International Procurement Contracts

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 is for Canada and approximately $38 million is for jurisdictions in Europe, Asia-Pacific,
and  the  Middle  East.  Additionally,  the  contract  with  the  Canadian  Department  of  National  Defence  ("CDND")  has  an  option  until  March  31,  2024,
exercisable at its sole discretion, for the purchase of up to an additional $6 million of oral TPOXX®. With respect to the $77 million of firm commitment
orders that were received this year, approximately $71 million of oral TPOXX® was delivered and recorded as revenue in 2022. Through an International
Promotion  Agreement  (defined  and  discussed  below),  Meridian  Medical  Technologies,  Inc.  (“Meridian”)  is  the  counterparty  to  international  contracts
under  which  orders  are  placed  for  the  purchase  of  oral  TPOXX®.  The  Public  Health  Agency  of  Canada  (“PHAC”)  and  the  CDND  are  among  the
contracting parties for the purchase of oral TPOXX® (see below for a summary description of these contracts). 

On  January  13,  2021,  PHAC  awarded  a  contract  to  Meridian  (the  “PHAC  Contract”)  for  the  purchase  of  up  to  approximately  $33  million  of  oral
TPOXX® (tecovirimat) within five years. In March 2022 and July 2022, PHAC executed amendments in which total procurement of oral TPOXX® under
the  PHAC  Contract  was  increased  to  an  amount  of  approximately  $45  million.  Prior  to  2022,  approximately  $10  million  of  oral  TPOXX®  had  been
ordered  and  delivered  to  PHAC.  During  2022,  all  remaining  amounts  under  the  PHAC  Contract  of  approximately  $35  million  of  oral  TPOXX®
were delivered to PHAC and recognized as revenue. 

On April  3,  2020,  the  Company  announced  that  the  CDND  awarded  a  contract  (the  "Canadian  Military  Contract")  to  Meridian,  pursuant  to  which  the
CDND  would  purchase  up  to  approximately  $14  million  of  oral  TPOXX®  over  four  years  in  an  option-based  contract.  Prior  to  2022,  approximately
$4  million  of  oral  TPOXX®  had  been  ordered  and  delivered  to  the  CDND.  In  2022,  approximately  $4  million  of  oral  TPOXX®  was  delivered  and
recognized as revenue under this contract, leaving approximately $6 million of unexercised options, exercisable at the sole discretion of CDND, remaining
under this contract.

The  above-listed  contract  awards  were  coordinated  between  SIGA  and  Meridian  under  the  international  promotion  agreement  (as  amended,  the
"International  Promotion  Agreement").  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, which has an effective date of May 31, 2019 and 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, 2022, the Company recognized $71.0 million in connection with
international  orders.  During  the  year  ended    December  31,  2021,  the  Company  recognized  $12.7  million  of  revenue  on  international  orders,  which
comprised deliveries to PHAC and CDND. 

Research Agreements and Grants
In July 2019, the Company was awarded a multi-year research contract valued at a total of $19.5 million, with an initial award of $12.4 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").  In  subsequent
modifications, the DoD increased the scope and the available funding under the PEP Label Expansion R&D Contract to approximately $27 million. The
period of performance for this contract, as modified, terminates on January 31, 2025. As of December 31, 2022, remaining revenue to be recognized in the
future  under  the  PEP  Label  Expansion  R&D  Contract  is  up  to  $6.4  million.  Revenue  from  the  performance  obligation  under  the  PEP  Label  Expansion
R&D  Contract  is  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, 2022 and 2021, the Company, under the PEP Label Expansion R&D Contract, recognized revenue of $17.9 million and $2.5 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, 2022   
  $

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

  $

As of

  December 31, 2022   
  $

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

  $

December 31,
2021

22,047 
17,453,358 
2,034,974 
19,510,379 

December 31,
2021

2,420,028 
511,062 
377,859 
3,678,647 
6,987,596 
(4,621,639)
2,365,957 

Depreciation  and  amortization  expense  on  property,  plant,  and  equipment  was  $0.5  million  for  each  of  the  years  ended  December  31,  2022, 2021,  and
2020. 

6. Accrued Expenses

Accrued expenses and other current liabilities consisted of the following:

As of

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

Accrued expenses and other current liabilities

  $

58

  December 31, 2022   
  $

December 31,
2021

3,764,696 
2,811,700 
256,397 
1,426,163 
527,026 
466,830 
9,252,812 

10,581,146    $
2,378,035     
1,551,920     
1,276,513     
536,997     
528,170     
16,852,781    $

 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
   
   
   
 
   
   
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
 
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7. Debt

On March 13, 2020, the Company voluntarily prepaid the Loan Agreement (as defined below) in an approximate aggregate amount of $87.2 million. The
prepayment was made from restricted cash, including $80.0 million in respect of outstanding principal of the Term Loan, $4.0 million that was payable
upon  the  repayment  of  the  Loan  Agreement,  approximately  $1.2  million  of  accrued  interest,  and  a  prepayment  premium  amount  of  approximately  $1.9
million. The prepayment was made upon the Company and the Lender agreeing to and entering into customary mutual releases reflecting that, subject to
such  prepayment  in  accordance  with  the  terms  of  the  Loan  Agreement,  all  of  the  obligations  under  the  Loan  Agreement  were  released,  discharged  and
satisfied in full. Upon such prepayment and release, the Loan Agreement was terminated. For the year ended December 31, 2020, the Company recognized
approximately $5.0 million of a loss on the extinguishment of the Term Loan related to the remaining unamortized discount and the prepayment premium.

On September  2,  2016,  the  Company  entered  into  a  loan  and  security  agreement  (as  amended  from  time  to  time,  the  “Loan  Agreement”)  with  OCM
Strategic Credit SIGTEC Holdings, LLC (“Lender”), pursuant to which the Company received $80.0 million (the "Term Loan") (less fees and other items)
on November 16, 2016 having satisfied certain pre-conditions.

The Term Loan had a maturity date on the earliest to occur of (i) the four-year anniversary of the Escrow Release Date, and (ii) the acceleration of certain
obligations pursuant to the Loan Agreement.

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8. 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

  $

  $

  $
  $

2022

Year Ended December 31,
2021

2020

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    $

56,342,010 
— 

56,342,010 
79,259,000 
178,306 
79,437,306 
0.71 
0.71 

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

For  the  year  ended  December  31,  2020,  diluted  shares  outstanding  include  the  dilutive  effect  of  in-the-money  options,  unvested  restricted  stock  and
unreleased RSUs. The dilutive effect of 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. Warrants were presumed to be cash-settled and therefore excluded from the diluted
earnings per share calculations for the year ended December 31, 2020 because the net effect of their inclusion, including the elimination of the impact in
the  operating  results  of  the  change  in  fair  value  of  the  warrants,  would  have  been  anti-dilutive.  For  the  year  ended  December  31,  2020,  the  weighted
average number of shares under the warrant excluded from the calculation of diluted earnings per share was 1,124,585.

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9. Financial Instruments

2016 Warrant
On September 2, 2016, in connection with the entry into the Loan Agreement (see Note 7 for additional information), the Company issued a warrant (the
“Warrant”) to the Lender to purchase a number of shares of the Company’s common stock equal to $4.0 million divided by the lower of (i) $2.29 per share
and (ii) the subscription price paid in connection with the Rights Offering completed on November 16, 2016. The per share subscription price paid was
$1.50 in connection with the Rights Offering; accordingly, the exercise price of the Warrant was set at $1.50 per share, and there were 2.7 million shares
underlying the Warrant. During the year ended December 31, 2020, 0.5 million shares on the warrant were exercised. Subsequent to partial exercises of the
Warrant, there were approximately 1.0 million shares underlying the Warrant as of December 31, 2021. During the year ended December  31,  2022,  the
remainder of the warrant was fully exercised. 

During  2022,  the  Warrant  was  fully  exercised,  and  therefore  there  are  no  remaining  underlying  shares  as  of  December  31,  2022.  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 prior to the exercise of the Warrant.

As  of  December  31,  2021,  there  were  approximately  1.0  million  shares  underlying  the  outstanding  Warrant  and  the  fair  value  of  the  Warrant  was
$6.5 million. A Black Scholes model was applied to calculate the fair value of the Warrant using the following assumptions: risk free interest rate of 1.21%;
no dividend yield; an expected life of 4.7 years; and a volatility factor of 55%.

10. Stockholders’ Equity

On December 31, 2022, 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, 2022 and 2021, no preferred shares were outstanding or issued.

On  August  2,  2021,  the  Company's  Board  of  Directors  authorized  a  share  repurchase  program  ("New  Repurchase  Authorization")  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.  Repurchases  under  the  New  Repurchase  Authorization    may  be  made  from  time  to  time  at  the  Company's
discretion in open market transactions, through block trades, in privately negotiated transactions and pursuant to any trading plan that may be adopted by
the Company's management in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended (the "Exchange Act") or otherwise.
The  timing  and  actual  number  of  shares  repurchased  will  depend  on  a  variety  of  factors,  including:  timing  of  procurement  orders  under  government
contracts;  alternative  opportunities  for  strategic  uses  of  cash;  the  stock  price  of  the  Company’s  common  stock;  market  conditions;  alternative  capital
management  uses  of  cash;  and  other  corporate  liquidity  requirements  and  priorities.  During  the  year  ended    December  31,  2022,  the  Company
repurchased 1.8 million shares of common stock under the New Repurchase Authorization for approximately $13.0 million.

Prior to the effective date of the New Repurchase Authorization, the Company repurchased shares under a program that was announced in March 2020.
Under this program, $50 million of the Company's common stock was repurchased.

On May 5, 2022, 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 $32.9 million. The special dividend was paid on June 2, 2022 to shareholders of record at the close of business on May 17, 2022.

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11. 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, 2022, 2021 and 2020, the Company recorded stock-based compensation expense, including stock options and RSUs, of
approximately $1.8 million, $1.3 million and $1.4 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 a combination of the historical volatility of
the Company's common stock and the historical volatility of a group of comparable companies’ common stock, both 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, 2022 (1)

Granted
Exercised
Canceled/Expired

Outstanding at December 31, 2022
Vested at December 31, 2022
Exercisable at December 31, 2022

159,623    $
50,000     
—     
—     
209,623    $
209,623    $
209,623    $

5.55     
9.27     
—     
—     
6.44     
6.44     
6.44     

7.82    $
7.82    $
7.82    $

289,359 
289,359 
289,359 

(1) Balances as of January 1, 2022 differ from those as of December 31, 2021 presented in the Company's 2021 Form 10-K due to the special dividend paid
during 2022. 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, 2022, 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, 2022 and 2021 was approximately $375,000 and $258,000, respectively.

There  were  no  stock  options  exercised  during  the  years  ended  December  31,  2022  and December  31,  2021.  The  total  intrinsic  value  of  stock  options
exercised was approximately $87,000 for the year ended December 31, 2020. The intrinsic value represents the amount by which the market price of the
underlying stock exceeds the exercise price of an option.

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Restricted Stock Units
RSUs 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, 2022 (1)

Granted (2)
Vested and released
Canceled/Expired

Outstanding at December 31, 2022 (3)

(1) includes 54,792 awards which were settled in cash in June 2022.
(2) includes 35,088 awards which were expected to be settled in cash.
(3) includes 30,702 awards which are expected to be settled in cash.

Number of
RSUs

329,333    $
190,138     
(187,188)    
(36,578)    
295,705    $

Weighted
Average
Grant-Date
Fair Value

6.95 
9.40 
6.58 
8.57 
8.56 

As of December 31, 2022, $1.2 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  0.7  years.  The  weighted  average  fair  value  at  the  date  of  grant  for  restricted  stock  awards
granted during the years ended December 31, 2022, 2021 and 2020 was $9.40, $6.95 and $5.95 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, 2022, 2021 and 2020 was approximately
$1.2 million, $0.9 million and $1.0 million, respectively.

12. 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,
2021

2022

2020

  $

  $

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    $

5,111,667 
447,965 
— 
5,559,632 

11,375,962 
230,987 
— 
11,606,949 
17,166,581 

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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
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,

2022

2021

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    $

1,293,912 
184,046 
741,684 
50,107 
280,396 
702,617 
— 
570,446 
267,050 
4,090,258 
(1,022,191)
3,068,067 

(197,245)
(156,289)
(291,926)
2,422,607 

  $

  $

  $

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, 2022, the Company has a valuation allowance on certain 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 did not change
materially from prior years. 

Effective beginning in fiscal 2022, the U.S. Tax Cuts and Job Act of 2017 ("TCJA") requires the Company to deduct U.S. and international research and
development expenditures for tax purposes over 5 to 15  years,  instead  of  in  the  current  fiscal  year.  The  Company  concurrently  records  a  deferred  tax
benefit for the future amortization of the research and development ("R&D") for tax purposes. The requirement to expense R&D as incurred is unchanged
for U.S. GAAP purposes and the impact to pre-tax R&D expense is not affected by this provision.

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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

2022

As of December 31,
2021

2020

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

21.0%   
0.5%   
— 
0.5%   
0.2%   
22.2%   

21.0%
0.7%
1.0%
0.5%
0.2%
23.4%

For the years ended December 31, 2022 and 2021, 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)  and  state  and  local  taxes.  For  the  year  ended
December  31,  2020,  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,
2021

2022

2020

  $

5,602,587    $

5,591,587    $

5,649,188 

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

11,000     
—     
—     
—     
5,602,587    $

— 
(57,601)
— 
— 
5,591,587 

  $

Included in the balance of unrecognized tax benefits as of December 31, 2022, 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, 2022 and  December 31, 2021,  was  $72,000  and  $95,000,
respectively. For the years ended  December 31, 2022 and  December 31, 2021, the Company recorded an income tax benefit of $23,000 and an income
tax  expense  of  $30,000,  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, 2022.

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 2019 to 2022. The Company's state and local tax years that are open to tax examination are generally 2018 to 2022.

13. Revenues by Geographic Region

Revenues by geographic region were as follows:

United States

  $

2022

For the year ended December 31,
2021
120,656,294    $

39,803,888    $

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

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

—     
13,014,160     
—     
—     
13,014,160     

2020
122,416,481 

— 
2,542,823 
— 
— 
2,542,823 

Total revenues

  $

110,775,610    $

133,670,454    $

124,959,304 

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14. 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, 2022 and 2021. Cash paid for amounts included in the measurement of
lease liabilities from operating cash flows was $0.6 million for each of the years ended December 31, 2022 and 2021. As of December 31, 2022, the
weighted-average remaining lease term of the Company’s operating leases was 3.7 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, 2022:

2023
2024
2025
2026
2027
Total undiscounted cash flows under operating leases
Less: Imputed interest
Present value of lease liabilities

  $

  $

613,878 
678,627 
406,994 
409,971 
165,916 
2,275,386 
(199,350)
2,076,036 

As of December 31, 2022, approximately $1.5 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, 2022, the Company has approximately $33.8 million of purchase commitments associated with manufacturing obligations.

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15. 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, 2022. During the years ended December 31, 2021 and 2020, the Company incurred expenses of approximately $0.1 million
and $0.5 million, respectively, 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, 2022.

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 consist 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, 2022, the Company paid $0.4 million of expenses associated with this lease.

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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,  2022  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, 2022 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, 2022 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, 2022 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, 2022.

Attestation Report of the Independent Registered Public Accounting Firm

The effectiveness of our internal control over financial reporting as of December 31, 2022 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.

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 2022 Annual Meeting of Stockholders ("2022 Proxy
Statement") in Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K, our 2023 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 2023 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 2023 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 2023
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 2023 Proxy Statement.

Item 11. Executive Compensation

The information required by this Item is incorporated by reference to the sections titled "Compensation Committee Report" and "Compensation

Discussion and Analysis" in our 2023 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 2023 Proxy Statement.

Equity Compensation Plan Information
The following table sets forth certain compensation plan information with respect to compensation plans as of December 31, 2022:

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

505,328    $
—     
505,328    $

7.68     
—     
7.68     

Number of Securities
Available for Future
Issuance under Equity
Compensation Plans (2)  
4,106,840 
— 
4,106,840 

(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  2023  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 2023 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 2023

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).

74

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

10(tt)

10(uu)

10(vv)

10(ww)

10(xx)

10(yy)

10(zz)

10(aaa)

10(bbb)

10(ccc)

10(ddd)

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).

75

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

23.1

Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm.

31.1

31.2

32.1

32.2

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.

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.

76

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Item 16. Form 10-K Summary

None.

77

 
 
 
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 2, 2023

SIGA TECHNOLOGIES, INC.
(Registrant)

By:

/s/ Phillip L. Gomez, Ph.D.
Phillip L. Gomez, 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/ Phillip L. Gomez, Ph.D.
Phillip L. Gomez, Ph.D.

/s/ Daniel J. Luckshire
Daniel J. Luckshire

/s/ Jaymie Durnan
Jaymie Durnan

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

/s/ Julie M. Kane
Julie M. Kane

/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/ Michael Plansky
Michael Plansky

/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

  Director

78

  Date
  March 2, 2023

  March 2, 2023

  March 2, 2023

  March 2, 2023

  March 2, 2023

  March 2, 2023

  March 2, 2023

  March 2, 2023

  March 2, 2023

  March 2, 2023

  March 2, 2023

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
   
 
   
 
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
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 2, 2023 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 2, 2023

 
 
 
 
 
 
Exhibit 31.1

I, Phillip L. Gomez, 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 2, 2023

/s/ Phillip L. Gomez, Ph.D.
Phillip L. Gomez, 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 2, 2023

/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, 2022 as
filed  with  the  Securities  and  Exchange  Commission  on  the  date  hereof  (the  “Report”),  I,  Phillip  L.  Gomez,  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/ Phillip L. Gomez, Ph.D.
Phillip L. Gomez, Ph.D.
Chief Executive Officer
March 2, 2023

 
 
 
 
 
 
 
 
 
 
 
 
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, 2022 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 2, 2023