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SIGA Technologies, Inc.

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FY2021 Annual Report · SIGA Technologies, Inc.
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Table of Contents

(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, 2021
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

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, 2021 as reported on The Nasdaq Global Market was approximately $313,533,032.

As of February 16, 2022, the registrant had outstanding 73,029,902 shares of common stock.

DOCUMENTS INCORPORATED BY REFERENCE

The following document is incorporated herein by reference:

Document
Proxy Statement for the Company’s 2022 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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16
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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, 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")  and  the  enforceability  of  the  1C  BARDA  Contract  and  the  19C  BARDA  Contract  (each  as  defined  below,  and  collectively,  the
"BARDA Contracts") with the U.S. Biomedical Advanced Research and Development Authority ("BARDA"). 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 Contracts, 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 Contracts on schedule or in accordance with contractual terms, (iii) the
risk that the BARDA Contracts 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  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  that  the  COVID-19  pandemic  could  impact  SIGA’s  operations  by  disrupting  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; and (xiv) the risk that the U.S. or foreign
governments' responses (including inaction) to the national or global economic conditions or infectious diseases such as COVID-19 are ineffective and may
affect SIGA’s business adversely, 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.

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.  Our  lead  product,  TPOXX®  (“oral  TPOXX®”),  is  a  U.S.  Food  &  Drug  Administration

("FDA")-approved oral formulation antiviral drug for the treatment of human smallpox disease caused by variola virus. 

Lead Product-TPOXX®

Oral TPOXX® is a novel, patented drug that is easy to store, transport and administer. On July 13, 2018, the FDA approved oral TPOXX® for the
treatment of smallpox. Oral TPOXX® labeling, approved by the FDA, limits sales of oral TPOXX® in the U.S. to those for the U.S. Strategic National
Stockpile ("Strategic Stockpile"). The Company has been delivering oral TPOXX® to the Strategic Stockpile since 2013.

On December 1, 2021, the Company announced that Health Canada approved oral tecovirimat as an extraordinary use drug.

On January 10, 2022, a Marketing Authorisation Application ("MAA") with the European Medicines Agency ("EMA") for oral tecovirimat was
approved. The MAA was filed under the centralized application process, which authorized the sale of oral tecovirimat in European Union member states, as
well  as  Norway  (which  granted  separate  follow-on  approval),  Iceland,  and  Liechtenstein.  The  EMA  approved  label  indication  covers  the  treatment  of
smallpox, monkeypox, cowpox, and vaccinia complications following vaccination against smallpox.

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

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

For the intravenous formulation of TPOXX® ("IV TPOXX®"), SIGA filed a New Drug Application ("NDA") with the FDA on April 30, 2021.
Based  on  its  review  of  the  NDA,  the  FDA  will  decide  whether  to  approve  IV  TPOXX®  and  whether  to  impose  any  marketing  restrictions  or  require
additional post-approval clinical studies. The Company is targeting the first half of 2022 for completion of this review process. There can be no assurance
that any approval will be granted on a timely basis, if at all.

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Procurement Contracts with the U.S. Government

19C BARDA Contract

On  September  10,  2018,  the  Company  entered  into  a  contract  with  the  U.S.  Biomedical  Advanced  Research  and  Development  Authority
("BARDA") pursuant to which SIGA agreed to deliver up to 1,488,000 courses of oral TPOXX® to the Strategic Stockpile, and to manufacture and deliver
to the Strategic Stockpile, or store as vendor-managed inventory, up to 212,000 courses of IV TPOXX®. 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, 2021, 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 $239.7 million of payments are related to exercised options and up to approximately $311.1 million of payments
are currently specified as unexercised options. The $239.7 million of payments related to exercised options includes an option exercised on September 7,
2021 for the manufacture and delivery of approximately $112.6 million of oral TPOXX®. 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  advanced  development  of  IV
TPOXX®; and payments of approximately $0.6 million for supportive procurement activities. As of December 31, 2021, the Company has received $11.1
million for the successful delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile, $3.2 million for the manufacture of IV
BDS and $13.8 million for other base period activities. IV BDS is expected to be used for the manufacture of 20,000 courses of IV FDP. The $3.2 million
received for the completed manufacture of IV BDS has been recorded as deferred revenue as of December 31, 2021 and December 31, 2020; such amount
is expected to be recognized as revenue when IV TPOXX® containing such IV BDS is delivered to the Strategic Stockpile or placed in vendor-managed
inventory.

The  options  that  have  been  exercised  to  date  provide  for  payments  up  to  approximately  $239.7  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®; and payments of up to $14.6 million for funding of
post-marketing activities for oral TPOXX®. As of December 31, 2021, the Company has delivered approximately $225.1 million (including the value of
raw materials) of oral TPOXX® to the Strategic Stockpile, of which approximately $112.5 million was delivered in 2021 (including approximately $79.7
million of oral TPOXX® that was delivered and invoiced in December 2021, for which full payment was received in January 2022); and $7.3 million has
been received or billed for in connection with post-marketing activities for oral TPOXX®.

Unexercised options specify potential payments up to approximately $311.1 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 $76.8 million
for the manufacture of courses of IV FDP, of which up to $30.7 million of payments would be paid upon 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
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).  If  BARDA  decides  to  only  exercise  IV  BDS  Options,  then  the  Company  would  receive  payments  up  to  $30.7  million;  alternatively,  if
BARDA decides to exercise both IV BDS Options and IV FDP Options, then the Company would receive payments up to $76.8 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 940,000 courses of smallpox antiviral treatment would need to be delivered to the U.S. Government between 2022 and 2024 in order to
maintain stockpile levels of unexpired smallpox antiviral treatment during this period.     

1C BARDA Contract (2011 BARDA Contract)

On  May  13,  2011,  the  Company  signed  a  contract  with  BARDA  ("1C  BARDA  Contract"  or  "2011  BARDA
Contract") pursuant to which BARDA agreed to buy from the Company  1.7 million courses of oral TPOXX®, as well as provide
development funding for certain activities.

The 1C BARDA Contract specifies approximately $ 508.4 million of payments, of which, as of December  31,  2021,  $
459.8 million had been received by the Company for the manufacture and delivery of oral TPOXX® and $ 45.9 million had been
received  for  certain  reimbursements  in  connection  with  development  and  supportive  activities.  Approximately  $  2.7  million
remains eligible to be received in the future for reimbursements of development and supportive activities.

The 1C BARDA Contract expires in December 2024.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
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International Procurement Contracts

Contract with Public Health Agency of Canada

On January 13, 2021, the Public Health Agency of Canada ("PHAC") awarded a contract to Meridian Medical Technologies, Inc. (“Meridian”)
(the “Contract”) for the purchase of up to approximately $33 million of oral TPOXX® (tecovirimat) within five years. In January 2022, PHAC published a
proposed amendment in which total procurement of oral TPOXX® under the Contract would be increased to an amount of up to $38 million, with firm
commitments for the cumulative purchase of approximately $23 million of oral TPOXX® by March 31, 2023; the remaining courses under the Contract are
targeted  for  delivery  after  March  31,  2023  and  are  subject  to  option  exercise  by  PHAC.  As  of  December  31,  2021,  approximately  $10  million  of  oral
TPOXX® courses had been delivered to and accepted by PHAC. Such courses were delivered in the first six months of 2021. The contract award was
coordinated  between  SIGA  and  Meridian  under  an  international  promotion  agreement,  as  amended  (the  "International  Promotion  Agreement")  that  was
entered into by the parties on June 3, 2019. As such, Meridian is the PHAC's counterparty under the Contract, and SIGA is responsible for manufacture and
delivery of any oral TPOXX® purchased thereunder. 

Canadian Military Contract

On  April  3,  2020,  the  Company  announced  that  the  Canadian  Department  of  National  Defence  (“CDND”)  awarded  a  contract  (the  "Canadian
Military Contract") to Meridian, pursuant to which the CDND will purchase up to approximately $14 million of oral TPOXX® over four years.  In the
second  quarter  2020,  CDND  purchased  approximately  $2  million  of  oral  TPOXX®.  In  the  third  quarter  of  2021,  CDND  purchased  another
approximately  $2  million  of  oral  TPOXX®  courses.  The  remaining  purchases  are  at  the  option  of  the  CDND.  Meridian  is  the  CDND's  counterparty
under the Canadian Military Contract, 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, 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.

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 years in which customer invoiced 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 years in which such net invoiced 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® 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%.  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

The Company has an R&D program for IV TPOXX®. This program is funded by the 19C BARDA Contract and a separate development contract
with BARDA ("IV Formulation R&D Contract"). The IV Formulation R&D Contract has a period of performance that terminates in February 2024. As of
December  31,  2021,  the  IV  Formulation  R&D  Contract  provided  for  future  aggregate  research  and  development  funding  of  up  to  approximately    $0.5
million. See Note 3 to the consolidated financial statements regarding the 19C BARDA Contract.

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 U.S. Department of Defense (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 $26 million. The period of performance for this contract, as modified, terminates on April 30, 2024. As of December 31, 2021,
the PEP Label Expansion R&D Contract provided for future aggregate research and development funding under the award, as modified, of up to  $23.3
million. 

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;  Powdersize,  LLC  (“Powdersize”);  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 new agreement, SIGA will
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, 2021, 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. Thereafter, the agreement will renew for successive one-year renewal
terms until either the Company or Grace provides notice of non-renewal at least 90 days prior to the expiration date of a term.

5

 
 
 
 
 
 
 
 
 
 
Table of Contents

Powdersize,  a  Lonza  Group  company,  micronizes  and  tests  API  for  use  in  oral  TPOXX®.  The  Company’s  agreement  with  Powdersize  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 has an initial term that ends 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 the agreement has been extended to March 1, 2023.  The
agreement can be terminated earlier than March 1, 2023 under certain conditions.

Intravenous (IV) formulation of TPOXX®:

For the manufacture of IV TPOXX® under the BARDA Contracts, 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. Thereafter, 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®.

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. All manufacturers within SIGA’s supply chain, including Grace, Powdersize, 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.

6

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Market for Biological Defense Programs

The  market  for  biodefense  countermeasures  reflects  continued  awareness  of  the  threat  of  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
biodefense  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, 2021, 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  biological  and  other  threats  to  civilian  populations
was approximately $2 billion.

In  response  to  the  COVID-19  pandemic,  Congress  has  appropriated  over  $45  billion  since  the  start  of  the  pandemic  across  four  supplemental
appropriations  for  the  purposes  of  developing  necessary  countermeasures  and  vaccines,  prioritizing  platform-based  technologies  with  U.S.-based
manufacturing capabilities, the purchase of vaccines, therapeutics, diagnostics, necessary medical supplies, as well as medical surge capacity, and other
preparedness and response activities. While the focus of such appropriations is to support a broad-based response to the COVID-19 pandemic, funds from
these appropriations could, depending on the COVID-19 response, be available to support biodefense activities related to the development of new medical
countermeasures, building and upgrading of facilities, improvement in surge capacity, and procurement of ancillary medical supplies.

We believe that potential markets for the sale of biodefense countermeasures in addition to the U.S. Government include:

•
•
•
•

foreign governments, including both defense and public health agencies;
NGOs and multinational companies, including transportation and security 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.

At present, oral TPOXX® is not approved for sale in the U.S. beyond sales to the U.S. Government for the purpose of stockpiling and/or usage by
the  Strategic  Stockpile.  The  Company  would  need  to  meet  additional  regulatory  requirements  before  sales  could  be  made  in  the  U.S.  beyond  the  U.S.
Government.

7

 
 
 
 
 
 
 
 
 
 
 
Table of Contents

General

We receive cash payments from BARDA 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.

Competition

The  biotechnology  and  pharmaceutical  industries  are  characterized  by  rapidly  evolving  technology  and  intense  competition.  Our  competitors
include  many  major  pharmaceutical  companies,  most  of  which  have  financial,  technical  and  marketing  resources  significantly  greater  than  ours.
Biotechnology and other pharmaceutical competitors in the biodefense space include, but are not limited to, Emergent BioSolutions Inc., Bavarian Nordic
AS,  and  Chimerix,  Inc.  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 biodefense products.

Human Capital Resources and Research Facilities

As  of  February  16,  2022,  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

SIGA’s commercial success will depend in part on its 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, 2022, the TPOXX® patent portfolio has seven patent families consisting of 28 U.S. utility patents, 97 issued foreign patents, two U.S. utility
patent applications, and 24 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
May 3, 2027
July 23, 2027
September 27, 2024

February 28, 2012 June 18, 2024

June 7, 2011

June 18, 2024

September 10, 2013June 18, 2024

8

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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

SG 184201

Singapore

SG 10201506031U Singapore

RU 2578606

Russia

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
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

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

August 2, 2031
May 15, 2017
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 10, 2017
August 14, 2033
December 7, 2018 August 14, 2033
August 14, 2033
August 2, 2019

9

 
 
Table of Contents

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

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

Canada

Canada
Canada
Canada

Canada

Canada

AU 2004249250

Australia

AU 2007351866

Australia

AU 2011232551

Australia

AU 2011285871
AU 2013302764

Australia
Australia

AU 2012268859

Australia

AU 2014290333
AU 2014353235
AU 2018201499
AU 2019208252

Australia
Australia
Australia
Australia

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
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

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
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
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

July 11, 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

November 14, 2034
August 14, 2033
November 14, 2034

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

10

 
 
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

11

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, 2024

April 12, 2017

June 18, 2024

April 12, 2017

June 18, 2024

April 12, 2017

June 18, 2024

A Patent Term Extension Application is pending for US 7737168, which would change the expiration date from May 3, 2027 to September 4, 2031. A
Patent Term Extension Application is also pending for US 8124643, which would change the expiration date from June 18, 2024 to December 13, 2027. In
the event that both US 7737168 and US 8124643 are found to be eligible for a patent term extension, SIGA would only be able to elect one of the two
patents for which the extension is sought and would elect to extend US 7737168.

*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, the Congo, 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  26  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
particular 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® 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.

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.

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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 2015 to extend protection from December 31, 2015 to December 31, 2022.

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 that 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  contract  revenues  would  come
from the 19C BARDA Contract, and the majority of the potential revenue under the 19C BARDA 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 typically 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.

More than 90% 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 future operating revenues to come significantly 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, 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 government contracts;  

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•

•

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

exercise an option to purchase only the minimum 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, including
the 19C BARDA Contract, could be terminated under these circumstances.

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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.

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 or formulations of TPOXX® from the FDA, we may not be able to
realize the full benefits of any BARDA contracts and may not be able to commercialize such formulations or 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  or  formulations  of  TPOXX®  in  the  U.S.,  such  as  the  intravenous
formulation  or  indication  of  use  for  post-exposure  prophylaxis,  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
or  formulations  of  TPOXX®,  or  there  could  be  delays  in  such  approval  of  TPOXX®,  or  the  approved  labeling  for  such  indications  or  formulations  of
TPOXX® may differ from expectations. Failure to obtain regulatory approval of certain indications or formulations for TPOXX® may prevent us from
fully  commercializing  TPOXX®  in  the  United  States  other  than  through  existing  sales  to  BARDA  and  may  impact  other  regulatory  authorities'  future
review of expanded formulations or 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.

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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® other than the oral formulation for smallpox treatment.

We  have  received  FDA  approval  only  for  the  oral  formulation  of  TPOXX®  in  the  U.S.,  not  the  intravenous  or  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,  including  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  sales  of  TPOXX®  to  customers  other  than  the  U.S.  and
Canadian governments.

An element of our business strategy is to sell TPOXX® internationally to foreign governments, as well as to customers other than the U.S. and
Canadian  governments.  These  potential  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.

To the extent we seek such non-government sales in the U.S., we may need to meet additional regulatory requirements.

The market for sales of TPOXX® to U.S. customers other than the U.S. Government is undeveloped, and we may not be successful in generating

meaningful sales of TPOXX®, if any, to these potential customers.

If  we  fail  to  increase  our  sales  of  TPOXX®  to  customers  other  than  the  U.S.  and  Canadian  governments,  our  business  and  opportunities  for

growth could be limited.

We  expect  our  future  international  revenues  to  depend  heavily  on  the  success  of  the  efforts  of  Meridian  pursuant  to  an  International  Promotion
Agreement, which may not be successful. 

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.

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 only by the U.S. and Canadian 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. 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.

Laws  and  regulations  governing  international  operations  may  hinder  us  from  developing,  manufacturing  and  selling  certain  product  candidates
outside of the United States and require us to revise and implement costly compliance programs.

In connection with our International Promotion Agreement with Meridian, Meridian serves as the entity that markets and promotes oral TPOXX®
(except  in  the  United  States)  and  is  the  counterparty  to  any  agreements  within  covered  foreign  jurisdictions.  As  such,  Meridian  is  responsible  for  anti-
corruption compliance related to its activities.

The failure to comply with laws governing international business practices may result in substantial penalties, including suspension or debarment
from  government  contracting.  Violation  of  the  Foreign  Corrupt  Practices  Act  ("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.  Conviction  of  a  violation  of  the  FCPA  can  result  in  long-term  disqualification  as  a  government  contractor.  The  termination  of  a  government
contract  or  relationship  as  a  result  of  our  failure  to  satisfy  any  of  our  obligations  under  laws  governing  international  business  practices  could  have  a
material negative impact on our operations and harm our reputation and ability to procure government contracts. The SEC also may suspend or bar issuers
from trading securities on United States exchanges for violations of the FCPA’s accounting provisions.

Other countries, such as the UK, have anti-bribery laws similar to or more expansive in scope than the FCPA which may be applicable to our

operations as we expand outside the U.S.

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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.

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 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 the 19C BARDA Contract or to develop, obtain approval of and commercialization of IV 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.  In  addition,  due  to  the  COVID-19  pandemic,  regulatory  authorities  may  not  conduct
required inspections at our CMO facilities, and without such inspections, drug approvals could be delayed. 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 only been approved by the FDA in 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 IV and
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  IV  and  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.

Intravenous  and  Liquid  Suspension/Pediatric  TPOXX®  formulations  are  currently  in  product  development  and  there  can  be  no  assurance  of
successful development or ultimate commercialization beyond the 19C BARDA Contract.

The fact that the FDA has approved the oral formulation of TPOXX® does not guarantee that our approach to drug development will be effective
or  will  result  in  the  successful  commercialization  of  the  IV  or  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.

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.

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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, 2022, the TPOXX® patent portfolio has seven patent families consisting of 28 U.S. utility patents, 97 issued foreign patents, two U.S. utility
patent applications, and 24 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  16,  2022,  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.  Such  disruption,  and  the  associated  risks  and  costs,  are
expected to continue for an indeterminate period of time. Given the uncertain future course of the COVID-19 pandemic, and the uncertain scale and scope
of its future direct and indirect impact, the Company is continually reviewing business and financial risks related to the pandemic and seeking coordination
with  its  government  partners  with  respect  to  the  performance  of  current  and  future  government  contracts.  Additionally,  the  Company  is  continually
coordinating  with  service  providers  and  vendors,  in  particular  Contract  Manufacturing  Organizations  that  constitute  our  supply  chain,  with  respect  to
actions and risks caused by the COVID-19 pandemic.

Additionally,  the  Company’s  supply  chain  for  the  manufacture  of  TPOXX®  and  for  the  raw  materials  and  supplies  necessary  to  support
manufacture  and  product  delivery  activities  on  future  projects,  could  be  materially  disrupted  by  COVID-19.  With  regard  to  day-to-day  operations,  the
COVID-19 pandemic, and the secondary effects of the pandemic, have at times slowed the daily pace of execution of government contracts as well as new
contract generation. For example, U.S. and foreign government staffs overseeing health security preparedness have been involved directly or indirectly in
governmental  responses  to  the  pandemic,  which  has  diverted  government  staff  time  that  would  normally  be  directed  toward  contract  matters  involving
SIGA. The Company expects to experience delays, or a slower than usual pace, in connection with certain research and development activities, such as
those that involve clinical trials. While the Company does not currently expect any pandemic-related delays in research and development activities to have
a material adverse impact on the financial condition or annual financial results of the Company, or its long-term performance, the Company cannot give
assurances as to the full extent of the impact at this time.

Overall,  while  the  COVID-19  pandemic  has  not  adversely  affected  the  liquidity  position  of  the  Company,  the  pandemic  has  diverted  foreign
government staff time normally directed toward contract matters involving SIGA and has affected and could continue to affect the timing of international
contract awards for oral TPOXX®. Additionally, although SIGA has completed delivery of TPOXX® courses covered by the option exercised by the U.S.
Government in 2021, the pandemic could result in a slower pace of future product deliveries if the pandemic results in shortages or delays in the receipt by
the  supply  chain  of  raw  materials  or  supplies.  Furthermore,  Executive  Order  14042  by  the  President  of  the  United  States,  which  subjects  federal  prime
contractors  and  subcontractors  to  certain  vaccination  requirements  and  other  COVID-19  related  safety  measures,  could  have  a  material  impact  on  the
availability and/or timing of services provided to SIGA by certain vendors for supply chain activities and research and development activities. The mandate
has been challenged in several cases that are currently pending, and in at least one case a nationwide injunction has barred enforcement of the mandate
while  the  cases  are  being  pursued.  The  future  outcome  of  such  litigation  is  uncertain,  and  consequently  the  scope  and  enforceability  of  the  underlying
vaccine mandate as it applies to federal contractors and subcontracts, is not known at this time. If the general negative effect of the COVID-19 pandemic
becomes more acute, including due to resurgences in infections or lack of vaccination, there could be material adverse effects to our business and cash
flows.

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Our business has been and will continue to be affected by the COVID-19 pandemic. The full extent and nature to which the COVID-19 pandemic, and
any related consequences, will impact our business, financial condition and results of operations is uncertain and cannot be predicted.

On September 9, 2021, President Biden directed the U.S. Department of Labor’s Occupational Safety and Health Administration (“OSHA”) to
issue an Emergency Temporary Standard (“ETS”) requiring that all employers with at least 100 employees ensure that their employees are fully vaccinated
for  COVID-19  or  obtain  a  negative  COVID-19  test  at  least  once  a  week.  President  Biden  also  issued  an  Executive  Order  requiring  certain  COVID-19
precautions for government contractors and their subcontractors, including mandatory employee vaccination (subject to medical and religious exemptions)
that directly impacts SIGA given its government contracts. Both mandates were challenged in court. On January 13, 2022, the U.S. Supreme Court stayed
the vaccine-or-test emergency temporary standard (ETS) that OSHA issued in November 2021. The stay will be in effect until the claims contesting the
ETS’ legality that are pending in the U.S. Court of Appeals for the Sixth Circuit are fully resolved. As a result, employers do not need to comply with the
ETS and OSHA cannot enforce it. Although the OSHA ETS is not in effect at this time, employers may be required under other laws to mandate vaccines
(subject to accommodation obligations), such as under the federal vaccine mandate for healthcare workers and the New York City Order requiring vaccines.
The vaccine mandate for federal contractors and subcontractors is currently not in effect, as it was stayed by a court in December 2021. It is not currently
possible to predict with any certainty the exact impact on us given the requirements for government contractors and their subcontractors. SIGA does not
expect a material impact on the current workforce from any requirement to mandate COVID-19 vaccination of our workforce, however such requirements
could result in employee attrition and difficulty securing future labor needs at our subcontractors, and therefore have an adverse effect on the amount and
timing of future profits. In addition, any requirement to impose obligations on our suppliers under the Executive Order covering government contractors
and their subcontractors could impact the price and continuity of services provided in connection with the supply chain, commercial activities and research
and  development  activities,  which  in  turn  could  impact  the  Company’s  performance  under  government  contracts  and  the  amount  and  timing  of  future
profits.

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.

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.

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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 Contracts, 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.

Our business and operations would suffer in the event of computer system failures, cyber-attacks or a 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,  confidential  patient  and  other  personal  or
sensitive information may be compromised in a cyber-attack or cyber-intrusion. 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.

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 26 holders of record as of February 16, 2022. 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, 2021 to October 31, 2021
November 1, 2021 to November 30, 2021
December 1, 2021 to December 31, 2021
Total

Total Number
of Shares
Purchased

Average Price
Paid per Share    

286,059    $
199,697     
277,237     
762,993    $

7.26     
7.73     
7.71     
7.55     

Total Number
of Shares
Purchased as
Part of
Publicly
Announced
Programs

286,059    $
199,697     
277,237     
762,993     

Dollar Value
of Shares That
May Yet Be
Purchased
Under the
Programs
49,156,221 
47,612,331 
45,475,535 

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, 2021, assuming reinvestment of dividends, by
an investor who invested $100 on December 31, 2016 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    $

168    $
128    $
121    $

274    $
123    $
110    $

166    $
167    $
137    $

252    $
239    $
172    $

261 
291 
171 

2016

2017

2018

2019

2020

2021

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, 2020 (filed with the SEC on March 4, 2021) for
additional discussion of our financial condition and results of operations for the year ended December 31, 2020, as well as our financial condition and
results of operations for the year ended December 31, 2020 compared to the year ended December 31, 2019. 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

We  are  a  commercial-stage  pharmaceutical  company.  Our  lead  product,  TPOXX®  (“oral  TPOXX®”),  is  a  United  States  Food  &  Drug
Administration ("FDA")-approved oral formulation antiviral drug for the treatment of human smallpox disease caused by variola virus. On July 13, 2018,
the FDA approved oral TPOXX® for the treatment of smallpox.

Oral TPOXX® is a novel, patented drug that is easy to store, transport and administer. Oral TPOXX® labeling, approved by the FDA, limits sales
of oral TPOXX® in the U.S. to those for the U.S. Strategic National Stockpile ("Strategic Stockpile"). The Company has been delivering oral TPOXX® to
the Strategic Stockpile since 2013.

On December 1, 2021, the Company announced that Health Canada approved oral tecovirimat as an extraordinary use drug.

On January 10, 2022, a Marketing Authorisation Application ("MAA") with the European Medicines Agency ("EMA") for oral tecovirimat was
approved. The MAA was filed under the centralized application process, which authorized the sale of oral tecovirimat in European Union member states, as
well  as  Norway  (which  granted  separate  follow-on  approval),  Iceland,  and  Liechtenstein.  The  EMA  approved  label  indication  covers  the  treatment  of
smallpox, monkeypox, cowpox, and vaccinia complications following vaccination against smallpox.

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

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

For the intravenous formulation of TPOXX® ("IV TPOXX®"), SIGA filed a New Drug Application ("NDA") with the FDA on April 30, 2021.
Based  on  its  review  of  the  NDA,  the  FDA  will  decide  whether  to  approve  IV  TPOXX®  and  whether  to  impose  any  marketing  restrictions  or  require
additional post-approval clinical studies. The Company is targeting the first half of 2022 for completion of this review process. There can be no assurance
that any approval will be granted on a timely basis, if at all.

COVID-19 Pandemic

The  COVID-19  pandemic  has  caused  significant  societal  and  economic  disruption.  Such  disruption,  and  the  associated  risks  and  costs,  are
expected to continue for an indeterminate period of time. Given the uncertain future course of the COVID-19 pandemic, and the uncertain scale and scope
of its future direct and indirect impact, the Company is continually reviewing business and financial risks related to the pandemic and seeking coordination
with  its  government  partners  with  respect  to  the  performance  of  current  and  future  government  contracts.  Additionally,  the  Company  is  continually
coordinating  with  service  providers  and  vendors,  in  particular  Contract  Manufacturing  Organizations  ("CMOs")  that  constitute  our  supply  chain,  with
respect to actions and risks caused by the COVID-19 pandemic.

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 daily pace of execution of government contracts as well as new contract generation. For example, U.S. and foreign government
staffs  overseeing  health  security  preparedness  have  been  involved  directly  or  indirectly  in  governmental  responses  to  the  pandemic,  which  has  diverted
government staff time that would normally be directed toward contract matters involving SIGA. 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. While the Company does not
currently expect any pandemic-related delays in such operational activities to have a material adverse impact on the financial condition or annual financial
results of the Company, or its long-term performance, the Company cannot give assurances as to the full extent of the impact at this time.

Overall,  while  the  COVID-19  pandemic  has  not  adversely  affected  the  liquidity  position  of  the  Company,  the  pandemic  has  diverted  foreign
government staff time normally directed toward contract matters involving SIGA and has affected and could continue to affect the timing of international
contract awards for oral TPOXX®. Additionally, although SIGA has completed delivery of TPOXX® courses covered by the procurement option exercised
in 2021, the pandemic could result in a slower pace of future product deliveries if the pandemic results in shortages or delays in the receipt by the supply
chain of raw materials or supplies. Furthermore, Executive Order 14042 by the President of the United States, which subjects federal prime contractors and
subcontractors to certain vaccination requirements and other COVID-19 related safety measures, could have a material impact on the availability and/or
timing  of  services  provided  to  SIGA  by  certain  vendors  for  supply  chain  activities  and  research  and  development  activities.  The  mandate  has  been
challenged in several cases that are currently pending, and in at least one case a nationwide injunction has barred enforcement of the mandate while the
cases  are  being  pursued.  The  future  outcome  of  such  litigation  is  uncertain,  and  consequently  the  scope  and  enforceability  of  the  underlying  vaccine
mandate as it applies to federal contractors and subcontracts, is not known at this time. If the general negative effect of the COVID-19 pandemic becomes
more acute, including due to resurgences in infections or lack of vaccination, there could be material adverse effects to our business and cash flows.

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Procurement Contracts with the U.S. Government

19C BARDA Contract

On  September  10,  2018,  the  Company  entered  into  a  contract  with  the  U.S.  Biomedical  Advanced  Research  and  Development  Authority
("BARDA")  pursuant  to  which  SIGA  agreed  to  deliver  up  to  1,488,000  courses  of  oral  TPOXX®  to  the  U.S.  Strategic  National  Stockpile  ("Strategic
Stockpile"), and to manufacture and deliver to the Strategic Stockpile, or store as vendor-managed inventory, up to 212,000 courses of the intravenous (IV)
formulation  of  TPOXX®  (“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, 2021, 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  $239.7
million of payments are related to exercised options and up to approximately $311.1 million of payments are currently specified as unexercised options.
The  $239.7  million  of  payments  related  to  exercised  options  includes  an  option  exercised  on  September  7,  2021  for  the  manufacture  and  delivery  of
approximately $112.6 million of oral TPOXX®. 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  advanced  development  of  IV
TPOXX®;  and  payments  of  approximately  $0.6  million  for  supportive  procurement  activities.  As  of  December  31,  2021,  the  Company  has  received
$11.1 million for the successful delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile, $3.2 million for the manufacture of
IV BDS and $13.8 million for other base period activities. IV BDS is expected to be used for the manufacture of 20,000 courses of IV FDP. The $3.2
million received for the completed manufacture of IV BDS has been recorded as deferred revenue as of December 31, 2021 and December 31, 2020; such
amount is expected to be recognized as revenue when IV TPOXX® containing such IV BDS is delivered to the Strategic Stockpile or placed in vendor-
managed inventory.

The  options  that  have  been  exercised  to  date  provide  for  payments  up  to  approximately  $239.7  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®; and payments of up to $14.6 million for funding of
post-marketing activities for oral TPOXX®. As of December 31, 2021, the Company has delivered approximately $225.1 million (including the value of
raw materials) of oral TPOXX® to the Strategic Stockpile, of which approximately $112.5 million was delivered in 2021 (including approximately $79.7
million of oral TPOXX® that was delivered and invoiced in December 2021, for which full payment was received in January 2022); and $7.3 million has
been received or billed for in connection with post-marketing activities for oral TPOXX®. 

Unexercised options specify potential payments up to approximately $311.1 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 $76.8 million
for the manufacture of courses of IV FDP, of which up to $30.7 million of payments would be paid upon 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
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).  If  BARDA  decides  to  only  exercise  IV  BDS  Options,  then  the  Company  would  receive  payments  up  to  $30.7  million;  alternatively,  if
BARDA decides to exercise both IV BDS Options and IV FDP Options, then the Company would receive payments up to $76.8 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 940,000 courses of smallpox antiviral treatment would need to be delivered to the U.S. Government between 2022 and 2024 in order to
maintain stockpile levels of unexpired smallpox antiviral treatment during this period.     

1C BARDA Contract (2011 BARDA Contract)

On May 13, 2011, the Company signed a contract with BARDA ("1C BARDA Contract" or "2011 BARDA Contract") pursuant to which BARDA

agreed to buy from the Company 1.7 million courses of oral TPOXX®, as well as provide development funding for certain activities.

The  1C  BARDA  Contract  specifies  approximately  $508.4  million  of  payments,  of  which,  as  of  December  31,  2021,  $459.8  million  had  been
received by the Company for the manufacture and delivery of oral TPOXX® and $45.9 million had been received for certain reimbursements in connection
with development and supportive activities. Approximately $2.7 million remains eligible to be received in the future for reimbursements of development
and supportive activities.

The 1C BARDA Contract expires in December 2024.

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International Procurement Contracts

Contract with Public Health Agency of Canada

On January 13, 2021, the Public Health Agency of Canada ("PHAC") awarded a contract to Meridian Medical Technologies, Inc. (“Meridian") (the
“Contract”) for the purchase of up to approximately $33 million of oral TPOXX® (tecovirimat) within five years. In January 2022, PHAC published a
proposed amendment in which total procurement of oral TPOXX® under the Contract would be increased to an amount of up to $38 million, with firm
commitments for the cumulative purchase of approximately $23 million of oral TPOXX® by March 31, 2023; the remaining courses under the Contract are
targeted  for  delivery  after  March  31,  2023  and  are  subject  to  option  exercise  by  PHAC.  As  of  December  31,  2021,  approximately  $10  million  of  oral
TPOXX® courses had been delivered to and accepted by PHAC. Such courses were delivered in the first six months of 2021. The contract award was
coordinated  between  SIGA  and  Meridian  under  an  international  promotion  agreement,  as  amended  (the  "International  Promotion  Agreement")  that  was
entered into by the parties on June 3, 2019. As such, Meridian is the PHAC's counterparty under the Contract, and SIGA is responsible for manufacture and
delivery of any oral TPOXX® purchased thereunder. 

Canadian Military Contract

On April 3, 2020, the Company announced that the Canadian Department of National Defence (“CDND”) awarded a contract (the "Canadian Military
Contract")  to  Meridian,  pursuant  to  which  the  CDND  will  purchase  up  to  approximately  $14  million  of  oral  TPOXX®  over  four  years.    In  the  second
quarter  2020,  CDND  purchased  approximately  $2  million  of  oral  TPOXX®.  In  the  third  quarter  of  2021,  CDND  purchased  another  approximately
$2 million of oral TPOXX® courses. The remaining purchases are at the option of the CDND. Meridian is the CDND's counterparty under the Canadian
Military Contract, 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, 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.

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 years in which customer invoiced 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  years  in  which  such  net  invoiced  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® 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%.  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).

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,
the valuation of warrants granted or issued by the Company, and income taxes (including realization of deferred tax assets).

Revenue Recognition

All of our revenue is derived from long-term contracts that can span multiple years. 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. As of December 31,
2021, we recorded an uncertain tax position attributable to a reduction related to state net operating loss carryforwards. In the event that we conclude that
we are subject to interest and/or penalties arising from uncertain tax positions, we will present interest and penalties as a component of income taxes.

On  March  27,  2020,  the  Coronavirus  Aid,  Relief  and  Economic  Security  Act  (“CARES  Act”)  was  enacted  in  response  to  the  COVID-19
pandemic. Under ASC 740, the effects of changes in tax rates and laws are recognized in the period which the new legislation is enacted. The CARES Act
made various tax law changes, including among other things: (i) increasing the limitation under IRC Section 163(j) for 2019 and 2020 to permit additional
expensing  of  interest;  (ii)  enacting  a  technical  correction  so  that  qualified  improvement  property  can  be  immediately  expensed  under  IRC  Section
168(k); (iii) making modifications to the federal net operating loss rules including permitting federal net operating losses incurred in 2018, 2019, and 2020
to be carried back to the five preceding taxable years in order to generate a refund of previously paid income taxes; and (iv) enhancing recoverability of
AMT tax credit carryforwards.

Warrant Liability

We  account  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 is estimated
using  a  model-derived  valuation.  Determining  the  fair  value  for  warrants  includes  the  expected  volatility  of  our  stock.  An  increase  or  decrease  in  the
expected  volatility  of  our  stock  of  10%  would  result  in  an  additional  gain  or  loss  of  approximately  $0.1  million.  Any  changes  in  the  fair  value  of  the
warrants are reported in earnings or loss as long as they are classified as assets or liabilities.

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, 2021 and 2020

Revenues from product sales and supportive services for the years ended December 31, 2021 and 2020 were $126.8 million and $115.5 million,
respectively.  Such  revenues  for  the  year  ended  December  31,  2021  include  $112.5  million  of  revenue  related  to  sales  of  oral  TPOXX®  to  the  U.S.
Government  under  the  19C  BARDA  Contract  and  $12.7  million  of  revenue  related  to  international  sales  of  oral  TPOXX®.  Such  revenues  for  the  year
ended December 31, 2020 include $112.6 million of revenue related to sales of oral TPOXX® to the U.S. Government under the 19C BARDA Contract
and $2.3 million of revenue related to international sales of oral TPOXX®.

Revenues  from  research  and  development  contracts  and  grants  for  the  years  ended  December  31,  2021  and  2020,  were  $6.9  million  and  $9.5
million, respectively. The decrease of $2.6 million, or 27.6%, primarily reflects a decrease in revenue in connection with a decrease in direct vendor-related
costs  for  IV  TPOXX®  and  post-marketing  regulatory  activities  for  oral  TPOXX®,  partially  offset  by  higher  revenues  associated  with  the  PEP  Label
Expansion R&D Contract.

Cost of sales and supportive services for the years ended December 31, 2021 and 2020 were $16.6 million and $14.8 million, respectively. Such
costs  in  2021  and  2020  were  primarily  associated  with  the  manufacture  and  delivery  of  oral  TPOXX®  courses  to  the  U.S.  Government  under  the  19C
BARDA Contract and in connection with international sales. Additionally, there was an inventory-related loss of $0.6 million in 2021.

Selling, general and administrative expenses for the years ended December 31, 2021 and 2020 were $17.3 million and $14.0 million, respectively,
reflecting an increase of $3.3 million, or 23.7%. The increase primarily reflects the promotion fees paid in connection with the courses delivered to PHAC
and the CDND in 2021 as well as an increase in certain insurance, business development and consulting costs.

Research and development expenses were $9.9 million for the year ended December 31, 2021, a decrease of approximately $1.0 million, or 9.1%
from  the  $10.9  million  incurred  during  the  year  ended  December  31,  2020.  The  decrease  is  primarily  attributable  to  a  decrease  in  direct  vendor-related
expenses  incurred  under  the  BARDA  19C  Contract  in  connection  with  supporting  the  development  of  IV  TPOXX®  and  post-marketing  regulatory
activities for oral TPOXX®, partially offset by higher costs associated with the PEP Label Expansion R&D Contract.

Patent expenses for the years ended December 31, 2021 and 2020 were $0.7 million. These expenses reflect our ongoing efforts to protect our lead

drug candidates in varied geographic territories.

In  connection  with  the  voluntary  repayment  of  the  term  loan  facility  under  the  Loan  Agreement  (the  "Term  Loan")  on  March  13,  2020,  we

recognized a loss on the extinguishment of the Term Loan of approximately $5.0 million for the year ended December 31, 2020.

Interest  expense  on  the  Term  Loan  for  the  year  ended  December  31,  2020  was  $3.0  million.  The  $3.0  million  of  interest  for  the  year  ended
December 31, 2020 includes $0.9 million of accretion of unamortized costs and fees (prior to repayment of the Term Loan). There was no interest expense
recognized for the year ended December 31, 2021 as our Term Loan was paid off in March 2020.

Changes  in  the  fair  value  of  the  liability  classified  warrant  to  acquire  common  stock  were  recorded  within  the  income  statement.  For  the  year
ended December 31, 2021, we recorded a gain of approximately $0.1 million reflecting a decrease in the fair value of the liability-classified warrant. For
the year ended December 31, 2020, we recorded a loss of approximately $3.5 million reflecting an increase in fair value of the liability-classified warrant
primarily due to an increase in the price of our common stock.      

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Other  income,  net  for  the  years  ended  December  31,  2021  and  2020  was  $0.1  million  and  $0.5  million,  respectively.  Other  income
primarily reflects interest income on the Company's cash balance held in restricted and unrestricted accounts. The decrease of approximately $0.4 million is
driven by lower cash balances during the year as well as lower interest rates for 2021 when compared to 2020. 

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.

For the year ended December 31, 2020, we recognized a tax provision of $17.2 million on pre-tax income of $73.5 million. Our effective tax rate
for the year ended December 31, 2020 was 23.4% and differs from the statutory rate of 21% primarily as a result of a non-taxable adjustment for the fair
market value of the Warrant, non-deductible executive compensation under IRC Section 162(m), and state and local taxes.

Liquidity and Capital Resources

As of December 31, 2021, we had $103.1 million in cash and cash equivalents, compared with $117.9 million at December 31, 2020. There was
no  restricted  cash  as  of  December  31,  2021  or  December  31,  2020  given  that  the  Term  Loan  was  repaid  in  March  2020.  The  restricted  cash  and  cash
equivalents were available to pay interest, fees and principal on the Term Loan. The Company voluntarily prepaid the Term Loan on March 13, 2020 in an
approximate amount of $87.2 million, including accrued interest. As a result of repayment of the Term Loan, there are no restrictions on the use of our cash
and cash equivalents.

Operating Activities

We prepare our consolidated statement of cash flows using the indirect method. Under this method, we reconcile net income (loss) to cash flows
from operating activities by adjusting net income (loss) for those items that impact net income (loss) 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 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, 2021 and 2020 was $11.5 million and $71.5 million, respectively.  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.  For  the  year  ended  December  31,
2020, the receipt of approximately $114.9 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, 2021 and 2020, our accounts receivable balance was approximately $83.7 million (which includes approximately $2.2 million
of  unbilled  receivables)  and  $3.3  million,  respectively.  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.  Our
accounts receivable balance as of December 31, 2020 primarily reflects work that was reimbursable by BARDA and was performed during the year ended
December 31, 2020 in connection with oral and IV TPOXX®.

Investing Activities

Cash  used  in  investing  activities  for  the  years  ended  December  31,  2021  and  2020  was  $50,620  and  $15,501,  respectively,  related  to  capital

expenditures. 

Financing Activities

Cash used in financing activities for the years ended December 31, 2021 and 2020 was $26.2 million and $114.6 million, respectively. For the year
ended December 31, 2021, $26.0 million was associated with our repurchase of approximately 3.8 million shares of common stock. For the year ended
December 31, 2020, $85.9 million was associated with our voluntary prepayment of the Term Loan and approximately $28.5 million was associated with
the repurchase of approximately 4.6 million shares of common stock.

Future Cash Requirements

As  of  December  31,  2021,  we  have  outstanding  purchase  orders  associated  with  manufacturing  obligations  in  the  aggregate  amount  of

approximately $20.1 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. Additionally, we are subject to the impact of stock price
fluctuations of our common stock in that we have a liability-classified warrant in which 1.0 million shares of SIGA common stock can be purchased at a
strike  price  of  $1.50  per  share.  For  every  $1  increase  in  the  stock  price  of  SIGA,  the  intrinsic  value  of  the  liability-classified  warrant  will  increase  by
approximately $1.0 million.

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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 (Loss)

Consolidated Statements of Changes in Stockholders’ Equity/(Deficiency)

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

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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, 2021
and 2020, and the related consolidated statements of operations and comprehensive income (loss), of changes in stockholders' equity/(deficiency) and of
cash flows for each of the three years in the period ended December 31, 2021, 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, 2021, 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, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021 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, 2021, based on criteria established in Internal Control - Integrated
Framework (2013) issued by the COSO.

Changes in Accounting Principles

As discussed in Note 2 to the consolidated financial statements, the Company changed the manner in which it accounts for leases in 2019.

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, all of the Company’s revenue for the year ended December 31, 2021 was generated
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 $4.8 million and $2.5 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 3, 2022

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 13)
Stockholders' equity

Common stock ($.0001 par value, 600,000,000 shares authorized, 73,543,602 and 77,195,704 issued
and outstanding at December 31, 2021 and December 31, 2020, respectively)
Additional paid-in capital
Accumulated deficit

Total stockholders' equity
Total liabilities and stockholders' equity

  December 31, 2021   

December 31,
2020

  $

  $

  $

  $

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     

117,890,240 
3,340,263 
20,265,519 
2,112,069 
143,608,091 

2,103,990 
2,544,053 
898,334 
676,923 
149,831,391 

1,278,217 
8,285,738 
919,555 
10,483,510 
6,639,211 
2,915,401 
20,038,122 

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

7,720 
224,978,430 
(95,192,881)
129,793,269 
149,831,391 

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 (LOSS)
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
Patent expenses

Total operating expenses

Operating income (loss)

Gain (loss) from change in fair value of warrant liability
Loss on extinguishment of Term Loan
Interest expense
Other income, net

Income (loss) before income taxes

(Provision) benefit for income taxes

Net and comprehensive income (loss)

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

2021

2020

2019

  $

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

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

11,190,064 
15,552,021 
26,742,085 

16,601,880     
17,323,429     
9,942,194     
710,152     
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     
14,003,184     
10,938,930     
719,141     
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     

1,782,838 
13,252,136 
13,303,149 
726,105 
29,064,228 
(2,322,143)
5,091,256 
— 
(15,769,768)
2,822,232 
(10,178,423)
2,937,276 
(7,241,147)
(0.09)
(0.15)
81,031,254 
82,175,023 

  $
  $
  $

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/(DEFICIENCY)
For the Years Ended December 31, 2021, 2020 and 2019

Common Stock

    Accumulated     Comprehensive    Stockholders’ 

    Additional      
Paid-In

    Accumulated      
Other

Total

Shares

    Amount

Capital

Deficit

    Income (Loss)    

    80,763,350    $

8,076    $ 218,697,872    $ (115,791,261)   $
(7,241,147)    

Balances, December 31, 2018
Net loss
Issuance of common stock upon exercise of stock
options
Issuance of common stock upon vesting of RSUs
and exercise of stock-settled appreciation rights
Issuance of common stock to employees
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, 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

9,769     

515,888     
53,332     

1     

52     
5     

(1)    

(52)    
(5)    

159,782     

16     

1,172,785     

(232,253)    

(23)    

(1,176,556)    
2,113,994     

    81,269,868    $

(4,628,473)    

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

(463)    

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)   $

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

47

Equity/
(Deficiency)  
—    $ 102,914,687 
(7,241,147)

— 

— 
— 

1,172,801 

(1,176,579)
2,113,994 
—    $ 97,783,756 
56,342,010 
(28,502,946)

— 
— 

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 

 
 
 
 
   
 
     
 
     
 
     
 
 
 
 
   
 
     
 
 
   
   
 
 
 
   
 
 
   
   
   
      
     
     
     
   
     
     
   
     
     
   
     
     
   
     
     
   
     
     
   
      
     
     
     
   
      
     
     
     
   
     
     
   
     
     
     
     
   
     
     
   
     
     
   
      
     
     
     
   
      
     
     
     
   
     
     
     
     
   
     
     
   
      
     
     
     
 
 
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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 (loss)

Adjustments to reconcile net income (loss) to net cash provided by (used in)
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 provision (benefit)
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 (used in) 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
Cash used in financing activities

Net decrease in cash and cash equivalents
Cash, cash equivalents and restricted cash at the beginning of period
Cash, cash equivalents and restricted cash at end of period

Supplemental disclosure of cash flows information:
Non-cash lease right-of-use asset and associated liability (net of deferred rent in
2019)
Conversion of warrant to common stock
Issuance of common stock upon cashless exercise
Cash income taxes paid (refund), net

  $

  $
  $
  $
  $

2021

2020

2019

  $

69,450,766    $

56,342,010    $

(7,241,147)

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     

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     

526,997 
(5,091,256)
2,113,994 
— 
(2,417,617)
— 
4,497,271 

(2,208,863)
(6,744,644)
(714,272)
936,839 
— 
(1,861,605)
(18,204,303)

(50,620)    
(50,620)    

(15,501)    
(15,501)    

(29,094)
(29,094)

(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    $

(1,176,579)
— 
— 
(1,176,579)
(19,409,976)
180,396,910 
160,986,934 

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

—    $
3,003,517    $
97,250    $
3,718,581    $

2,944,932 
1,172,801 
118,500 
(1,276,129)

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's  lead  product,  TPOXX®  (“oral
TPOXX®”) is a United States Food & Drug Administration ("FDA")-approved oral formulation antiviral drug for the treatment of human smallpox disease
caused by variola virus. On July 13, 2018, the FDA approved oral TPOXX®.

Oral TPOXX® is a novel, patented drug that is easy to store, transport and administer. Oral TPOXX® labeling, approved by the FDA, limits sales of oral
TPOXX® in the U.S. to those for the U.S. Strategic National Stockpile ("Strategic Stockpile"). The Company has been delivering oral TPOXX® to the
Strategic Stockpile since 2013.

On December 1, 2021, the Company announced that Health Canada approved oral tecovirimat as an extraordinary use drug.

On  January  10,  2022,  a  Marketing  Authorisation  Application  ("MAA")  with  the  European  Medicines  Agency  ("EMA")  for  oral  tecovirimat  was
approved. The MAA was filed under the centralized application process, which authorized the sale of oral tecovirimat in European Union member states, as
well  as  Norway  (which  granted  separate  follow-on  approval),  Iceland,  and  Liechtenstein.  The  EMA  approved  label  indication  covers  the  treatment  of
smallpox, monkeypox, cowpox, and vaccinia complications following vaccination against smallpox.

With  respect  to  the  regulatory  approvals  by  Health  Canada  and  the  EMA,  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 fair value of warrants granted or issued by the Company, reported amounts of revenue, 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
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, 2021 or 2020.

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    $

2018
100,652,809 
11,452,078 
68,292,023 
180,396,910 

  $

  $

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.

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Accounts Receivable
Accounts  receivable  are  recorded  net  of  provisions  for  doubtful  accounts.  At  December  31,  2021  and 2020,  98%  and  100%,  respectively,  of  accounts
receivable  represented  receivables  from  the  U.S.  Government.  An  allowance  for  doubtful  accounts  is  based  on  specific  analysis  of  the  receivables.  At
December 31, 2021 and 2020, 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 no  longer  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 accounts 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 is estimated
using  model-derived  valuations.  Any  changes  in  the  fair  value  of  the  derivative  instruments  are  reported  in  earnings  or  loss  as  long  as  the  derivative
contracts are classified as assets or liabilities.

Revenue Recognition
All of the Company’s revenue is derived from long-term contracts that span multiple years. 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, 2021, the Company's active performance obligations, for the contracts outlined in Note 3, consist
of the following: five performance obligations relate to research and development services; two relate to manufacture and delivery of product; and one is
associated with storage 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. 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.

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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,  2021,  the  accounts  receivable  balance  in  the  balance  sheet  includes  approximately  $2.2  million  of  unbilled  receivables.  Under  typical
payment terms of fixed price arrangements, the customer pays the Company either performance-based payments or progress payments. For the Company’s
cost-type  arrangements,  the  customer  generally  pays  the  Company  for  its  actual  costs  incurred,  as  well  as  its  allocated  overhead  and  G&A  costs.  Such
payments occur within a short period of time from billing. When the Company receives consideration, or such consideration is unconditionally due, prior to
transferring  goods  or  services  to  the  customer  under  the  terms  of  a  sales  contract,  the  Company  records  deferred  revenue,  which  represents  a  contract
liability.  During  the  year  ended  December  31,  2021,  the  Company  recognized  revenue  of  $0.1  million  that  was  included  in  deferred  revenue  at  the
beginning of the period.

Remaining  Performance  Obligations.  Remaining  performance  obligations  represent  the  transaction  price  for  which  work  has  not  been
performed  and  excludes  unexercised  contract  options.  As  of  December  31,  2021,  the  aggregate  amount  of  transaction  price  allocated  to  remaining
performance obligations was $61.8 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 outside the Company’s control.

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

Adoption of ASC 842. On January 1, 2019, the Company adopted ASC 842 using the modified retrospective approach as of the effective date of
the standard without revising prior periods. In addition, the Company elected the package of practical expedients permitted under the transition guidance
within  the  new  standard,  which  among  other  things,  allowed  the  Company  to  carry  forward  its  historical  lease  classification.  In  addition,  the  Company
elected  the  hindsight  practical  expedient  to  determine  the  lease  term  for  existing  leases.  The  Company’s  election  of  the  hindsight  practical  expedient
resulted in the extension of the Oregon lease term as it was determined that the first renewal option under this lease was expected to be exercised with a
reasonable degree of certainty. In the second quarter of 2019, the Company exercised the first renewal option under the Oregon lease. The Company was
required  to  record  an  operating  lease  right-of-use  ("ROU")  asset  and  a  corresponding  operating  lease  liability,  equal  to  the  present  value  of  the  lease
payments at the adoption date. In the determination of future lease payments, the Company has elected to aggregate lease components such as payments for
rent, taxes and insurance costs with non-lease components such as maintenance costs and account for these payments as a single lease component. The
present value of the lease payments was determined using the Company's incremental borrowing rate. The impact of adopting ASC 842 as of January 1,
2019 was the recording of operating lease right-of-use assets of approximately $2.9 million; the recording of operating lease liabilities of approximately
$3.3 million; and a decrease to deferred rent of approximately $0.4 million.

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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 on 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 2021 or 2020. As of December 31, 2021 and  December 31, 2020, the Company
had  approximately  $0.1  million  and  $0.1  million,  respectively,  of  cash  and  cash  equivalents  classified  as  Level  1  financial  instruments.  There  were  no
Level 2 financial instruments as of December 31, 2021 or December 31, 2020. 

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

Warrant liability at December 31, 2020
Decrease in fair value of warrant liability
Exercise of warrants
Warrant liability at December 31, 2021

Fair Value Measurements of Level 3
liability-classified warrant

  $

  $

6,639,211 
(117,770)
— 
6,521,441 

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

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Segment Information
The Company is managed and operated as one business. The entire business is managed by a single management team that reports to the chief executive
officer, who is the Chief Operating Decision Maker. The Company does not operate separate lines of business or separate business entities with respect to
any  of  its  product  candidates.  Accordingly,  the  Company  does  not  prepare  discrete  financial  information  with  respect  to  separate  product  areas  or  by
location and has only one reportable segment.

Recent Accounting Pronouncements
In December  2019,  the  FASB  issued  ASU  No. 2019-12, Simplifying  the  Accounting  for  Income  Taxes,  as  part  of  its  initiative  to  reduce  complexity  in
accounting standards. The amendments in the ASU are effective for fiscal years beginning after December 15, 2020, including interim periods therein. The
adoption of this standard in the first quarter of 2021 had no impact on the 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 U.S. Strategic National Stockpile ("Strategic Stockpile"), and to
manufacture and deliver to the Strategic Stockpile, or store as vendor-managed inventory, up to 212,000 courses of the intravenous (IV) formulation of
TPOXX® (“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,  2021,  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  $239.7  million  of
payments are related to exercised options and up to approximately $311.1 million of payments are currently specified as unexercised options. The $239.7
million of payments related to exercised options includes an option exercised on September 7, 2021 for the manufacture and delivery of approximately
$112.6 million of oral TPOXX®. 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 advanced development of IV TPOXX®;
and payments of approximately $0.6 million for supportive procurement activities. As of December 31, 2021, the Company has received $11.1 million for
the successful delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile, $3.2 million for the manufacture of IV BDS and $13.8
million for other base period activities. IV BDS is expected to be used for the manufacture of 20,000 courses of IV FDP. The $3.2 million received for the
completed manufacture of IV BDS has been recorded as deferred revenue as of  December 31, 2021 and December 31, 2020; such amount is expected to be
recognized as revenue when IV TPOXX® containing such IV BDS is delivered to the Strategic Stockpile or placed in vendor-managed inventory.

The  options  that  have  been  exercised  to  date  provide  for  payments  up  to  approximately  $239.7  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®;  and  payments  of  up  to  $14.6  million  for  funding  of  post-marketing
activities for oral TPOXX®. As of December 31, 2021, the Company has delivered approximately $225.1 million (including the value of raw materials) of
oral  TPOXX®  to  the  Strategic  Stockpile,  of  which  approximately  $112.5  million  was  delivered  in  2021 (including approximately $79.7 million of oral
TPOXX® that was delivered and invoiced in December 2021, for which full payment was received in January 2022); and $7.3 million has been received or
billed for in connection with post-marketing activities for oral TPOXX®. 

Unexercised options specify potential payments up to approximately $311.1 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 $76.8 million for the
manufacture of courses of IV FDP, of which up to $30.7 million of payments would be paid upon 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 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).  If  BARDA  decides  to  only  exercise  IV  BDS  Options,  then  the  Company  would  receive  payments  up  to  $30.7  million;  alternatively,  if
BARDA decides to exercise both IV BDS Options and IV FDP Options, then the Company would receive payments up to $76.8 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, 2021 and 2020, the Company
recognized revenues of $4.8 million and $7.5 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, 2021 and 2020, was $112.5 million and $112.6 million, respectively. 

1C BARDA Contract (2011 BARDA Contract)

On May 13, 2011, the Company signed a contract with BARDA ("1C BARDA Contract" or "2011 BARDA Contract") pursuant to which BARDA agreed
to buy from the Company 1.7 million courses of oral TPOXX®, as well as provide development funding for certain activities.

The 1C BARDA Contract specifies approximately $508.4 million of payments, of which, as of December 31, 2021, $459.8 million had been received by
the  Company  for  the  manufacture  and  delivery  of  oral  TPOXX®  and  $45.9  million  had  been  received  for  certain  reimbursements  in  connection  with
development and supportive activities. Approximately $2.7 million remains eligible to be received in the future for reimbursements of development and
supportive activities.

The 1C BARDA Contract expires in December 2024.

Remaining performance obligations under the 1C BARDA Contract generate revenue over time. For the years ended December 31, 2021  and  2020, the
Company  recognized  revenue  of  $0.2  million  and  $0.2  million,  respectively,  on  an  over  time  basis.  In  contrast,  no  revenue  was  recognized  for  product
delivery and supportive services and therefore at a point in time for the year ended December 31, 2021.  Revenue  recognized  for  product  delivery  and
supportive services and therefore at a point in time for the year ended December 31, 2020, was $0.4 million.

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International Procurement Contracts
On  January  13,  2021,  the  Public  Health  Agency  of  Canada  ("PHAC")  awarded  a  contract  to  Meridian  Medical  Technologies,  Inc.  (“Meridian”)  (the
“Contract”) for the purchase of up to approximately $33 million of oral TPOXX® (tecovirimat) within five years. In January  2022,  PHAC  published  a
proposed amendment in which total procurement of oral TPOXX® under the Contract would be increased to an amount of up to $38 million, with firm
commitments for the cumulative purchase of approximately $23 million of oral TPOXX® by March 31, 2023; the remaining courses under the Contract are
targeted  for  delivery  after  March  31,  2023  and  are  subject  to  option  exercise  by  PHAC.  As  of  December  31,  2021,  approximately  $10  million  of  oral
TPOXX® courses had been delivered to and accepted by PHAC. Such courses were delivered in the first six months of 2021.

On April 3, 2020, the  Company  announced  that  the  Canadian  Department  of  National  Defence  (“CDND”)  awarded  a  contract  (the  "Canadian  Military
Contract")  to  Meridian,  pursuant  to  which  the  CDND  will  purchase  up  to  approximately  $14  million  of  oral  TPOXX®  over  four  years.  In  the  second
quarter 2020,  CDND  purchased  approximately  $2  million  of  oral  TPOXX®.  In  the  third  quarter  of  2021,  CDND  purchased  another  approximately  $2
million  of  oral  TPOXX®  courses.  The  remaining  purchases  are  at  the  option  of  the  CDND.  Meridian  is  the  CDND's  counterparty  under  the  Canadian
Military Contract, and SIGA is responsible for manufacture and delivery of any oral TPOXX® purchased thereunder.

The PHAC and CDND contract awards were both coordinated between SIGA and Meridian under the international promotion agreement, as amended (the
"International Promotion Agreement") that was entered into by the parties on June 3, 2019.

Under the terms of the International Promotion Agreement, 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.

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 years in which customer invoiced 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 years in which such net invoiced amounts exceed the specified threshold.

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,  2021,  the  Company  recognized  $12.7  million  of  revenue  for
deliveries to PHAC and CDND. During the year ended  December 31, 2020, the Company recognized $2.3 million of revenue for delivery to CDND. 

Research Agreements and Grants
The Company has an R&D program for IV TPOXX®. This program is funded by the 19C BARDA Contract and a separate development contract with
BARDA  ("IV  Formulation  R&D  Contract").  The  IV  Formulation  R&D  Contract  has  a  period  of  performance  that  terminates  in  February  2024.  As  of
December  31,  2021,  the  IV  Formulation  R&D  Contract  provided  for  future  aggregate  research  and  development  funding  of  up  to  approximately  $0.5
million. Revenues in connection with the IV Formulation R&D Contract are recognized over time. For the years ended December 31, 2021 and 2020, the
Company recognized revenue of $0.8 million and $1.4 million, respectively, under this contract.

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
U.S.  Department  of  Defense  ("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 $26 million. The period of performance for this contract, as modified, terminates on April 30, 2024. As of December  31,  2021,  the  PEP
Label Expansion R&D Contract provided for future aggregate research and development funding under the award, as modified, of up to $23.3 million. For
the years ended December 31, 2021 and 2020, the Company, under the PEP Label Expansion R&D Contract, recognized revenue of $2.5 million and $0.3
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

As of

  December 31, 2021   
  $

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

  $

December 31,
2020

2,628,153 
15,415,425 
2,221,941 
20,265,519 

For the year ended December 31, 2021, cost of goods sold included a net inventory-related loss of $0.6 million. This loss related to a $0.9 million inventory
write-down, partially offset by credits received from contract manufacturing organizations ("CMOs") in connection with the inventory write-down.

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

  December 31, 2021   
  $

As of

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

December 31,
2020

2,420,028 
532,125 
377,859 
2,944,932 
6,274,944 
(4,170,954)
2,103,990 

  $

Depreciation  and  amortization  expense  on  property,  plant,  and  equipment  was  $0.5  million  for  each  of  the  years  ended  December  31,  2021, 2020,  and
2019. 

6. Accrued Expenses

Accrued expenses and other current liabilities consisted of the following:

As of

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

Accrued expenses and other current liabilities

  $

57

  December 31, 2021   
  $

December 31,
2020

3,280,947 
2,933,738 
486,158 
251,824 
150,349 
449,940 
405,176 
327,606 
8,285,738 

3,764,696    $
2,811,700     
558,362     
527,026     
488,081     
466,830     
379,720     
256,397     
9,252,812    $

 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
   
   
   
 
   
   
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
 
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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 (loss) for basic earnings per share
Less: Change in fair value of warrants
Net income (loss), 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 (loss) per share: basic
Earnings (loss) per share: diluted

  $

  $

  $
  $

2021

Year Ended December 31,
2020

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    $

2019

(7,241,147)
5,091,256 

(12,332,403)
81,031,254 
1,143,769 
82,175,023 
(0.09)
(0.15)

For the year ended December 31, 2021, the diluted earnings per share calculation reflects the effect of the 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 and warrants, unvested restricted stock and unreleased RSUs. The dilutive effect of warrants 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
year ended 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 the warrants, would have been anti-dilutive. For the year ended December 31, 2021, the weighted average number of shares under the cash-settled
RSUs excluded from the calculation of diluted earnings per share was 29,873.

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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The Company incurred losses for the year ended December 31, 2019 and as a result, for such year the equity instruments listed below were excluded from
the calculation of diluted earnings (loss) per share as the effect of the exercise, conversion or vesting of such instruments would have been anti-dilutive.
The weighted average number of equity instruments excluded consisted of:

Stock Options
Stock-Settled Stock Appreciation Rights
Restricted Stock Units

9. Financial Instruments

Year Ended
December 31,
2019

340,284 
1,666 
525,741 

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 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, 2021, no shares on the warrant were exercised. During the year ended December 31, 2020, 0.5 million
shares on the warrant were exercised. Subsequent to partial exercises of the Warrant, there are approximately 1.0 million shares underlying the Warrant as
of December 31, 2021. The Warrant provides for weighted average anti-dilution protection and is exercisable in whole or in part for ten (10) years from the
date of issuance.

The Company accounted for the Warrant in accordance with the authoritative guidance which requires that free-standing derivative financial instruments
with certain anti-dilution and cash settlement features be classified as assets or liabilities at the time of the transaction, and recorded at their fair value. Any
changes in the fair value of the derivative instruments are reported in earnings or loss as long as the derivative contracts are classified as assets or liabilities.
Accordingly, the Company classified the Warrant as a liability and reports its change in fair value in the consolidated statement of operations.

On September 2, 2016, the issuance date of the Warrant, the fair value of the liability-classified Warrant was $5.8 million. The Company applied a Monte
Carlo Simulation-model to calculate the fair value of the Warrant and compared the Monte Carlo simulation model calculation to a Black-Scholes model
calculation as of December 31, 2016. These models generated substantially equivalent fair values for the Warrant. As such, the Company utilized a Black-
Scholes model at December 31, 2021 and 2020 to determine the fair value of the Warrant.

As of December 31, 2021, 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%.

As of December 31, 2020, the fair value of the Warrant was $6.6 million. A Black Scholes model was applied to calculate the fair value of the Warrant
using the following assumptions: risk free interest rate of 0.46%; no dividend yield; an expected life of 5.7 years; and a volatility factor of 80%.

At December 31, 2021, pursuant to the Warrant agreement, there were no conditions under which current assets would have been required to satisfy the
Warrant obligation.

10. Stockholders’ Equity

On December 31, 2021, 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, 2021 and 2020, no preferred shares were outstanding or issued.

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. During the year ended December 31,
2021, the Company repurchased 3.2 million shares of common stock for approximately $21.5 million under this program. This program has been fulfilled
with the maximum amount being used to repurchase shares.

On August 2, 2021, the Company's Board of Directors authorized an additional 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 Exchange Act or otherwise. The timing and actual number of shares repurchased
will depend on a variety of factors, including: 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. During the year
ended  December 31, 2021, 0.6 million shares of common stock have been repurchased under the New Repurchase Authorization for approximately $4.5
million.

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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, 2021, 2020 and 2019, the Company recorded stock-based compensation expense, including stock options and RSUs, of
approximately $1.3 million, $1.4 million and $2.1 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 is based on the Company’s intent not to issue a dividend in the foreseeable future. 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     Aggregate
Intrinsic

Average
Remaining
Life
(in years)

Value
    (in thousands) 

Outstanding at January 1, 2021

Granted
Exercised
Canceled/Expired

Outstanding at December 31, 2021
Vested at December 31, 2021
Exercisable at December 31, 2021

253,000    $
50,000     
—     
(153,000)    
150,000    $
150,000    $
150,000    $

9.78     
6.57     
—     
12.53     
5.90     
5.90     
5.90     

8.18    $
8.18    $
8.18    $

243,000 
243,000 
243,000 

As of December 31, 2021, 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, 2021 and 2020 was approximately $258,000 and $383,000, respectively.

There were no stock options exercised during the year ended December 31, 2021. The total intrinsic value of stock options exercised was approximately
$87,000 and $76,000 for the years ended December 31, 2020 and December 31, 2019, respectively. 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 Awards/Restricted Stock Units
RSUs awarded to employees vest in equal annual installments over a two or three-year period 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, 2021

Granted (1)
Vested and released
Canceled/Expired

Outstanding at December 31, 2021 (1)

(1) includes 54,792 awards which are expected to be settled in cash.

Number of
RSUs

167,416    $
324,793     
(162,876)    
—     
329,333    $

Weighted
Average
Grant-Date
Fair Value

5.86 
6.95 
5.82 
— 
6.95 

As of December 31, 2021, $1.4 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  0.9  years.  The  weighted  average  fair  value  at  the  date  of  grant  for  restricted  stock  awards
granted during the years ended December 31, 2021, 2020 and 2019 was $6.95, $5.95 and $5.84 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, 2021, 2020 and 2019 was approximately
$0.9 million, $1.0 million and $1.6 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 (benefit)

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

For the year ended December 31,
2020

2021

2019

  $

  $

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    $

(663,114)
143,455 
— 
(519,659)

(2,092,585)
(325,032)
— 
(2,417,617)
(2,937,276)

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

Deferred income tax assets:

Net operating losses
Inventory
Reserves and accruals
Amortization of intangible assets
Share-based compensation
Deferred revenue
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,

2021

2020(1)

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    $

1,293,842 
224,656 
725,875 
80,930 
398,165 
709,480 
520,830 
191,174 
4,144,952 
(1,022,135)
3,122,817 

(199,172)
(81,065)
(298,527)
2,544,053 

  $

  $

  $

(1) Certain prior year amounts were reclassed to conform with current year presentation.

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, 2021, 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. 

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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

2021

As of December 31,
2020

2019

21.0%   
0.5%   
— 
0.5%   
0.2%   
22.2%   

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

21.0%
1.3%
10.5%
(6.0)%
2.1%
28.9%

For the year ended December 31, 2021, the Company’s effective tax rate differs from the statutory rate of 21% primarily as a result of non-deductible
executive compensation under IRC Section 162(m) 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,
2020

2021

2019

  $

5,591,587    $

5,649,188    $

5,738,964 

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

—     
(57,601)    
—     
—     
5,591,587    $

— 
(89,776)
— 
— 
5,649,188 

  $

Included in the balance of unrecognized tax benefits as of December 31, 2021, are potential benefits of $5.6 million that, if recognized, would affect the
effective tax rate. For the years ended  December 31, 2021 and December 31, 2020, interest and penalties on unrecognized tax benefits were $95,000 and
$65,000,  respectively.  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, 2021.

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 2018 to 2021. The Company's state and local tax years that are open to tax examination are generally 2017 to 2021.

13. 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 and $0.7 million for the years ended December 31, 2021 and 2020, respectively. Cash paid for amounts included
in the measurement of lease liabilities from operating cash flows was $0.6 million and $0.6 million for the years ended December 31, 2021 and 2020,
respectively. As of December 31, 2021, the weighted-average remaining lease term of the Company’s operating leases was 4.6 years while the weighted-
average discount rate was 4.53%.

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The following is a maturity analysis of the Company's lease liabilities as of December 31, 2021:

2022
2023
2024
2025
2026
Thereafter
Total undiscounted cash flows under operating leases
Less: Imputed interest
Present value of lease liabilities

577,473 
669,048 
678,627 
406,994 
409,971 
165,916 
2,908,029 
(309,991)
2,598,038 

  $

As of December 31, 2021, approximately $2.1 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, 2021, the Company has approximately $20.1 million of purchase commitments associated with manufacturing obligations.

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14. 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 used by the Company. During the years ended December 31, 2021, 2020 and 2019, the Company incurred expenses of approximately
$0.1 million, $0.5 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, 2021.

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, 2021, the Company paid $0.3 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,  2021  in  accordance  with  the  framework  on  Internal  Control-Integrated  Framework  (2013)  issued  by  the
Committee of Sponsoring Organizations of the Treadway Commission. 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, 2021 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, 2021 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, 2021 using the
framework in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. 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, 2021.

Attestation Report of the Independent Registered Public Accounting Firm

The effectiveness of our internal control over financial reporting as of December 31, 2021 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 2022 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 2022 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 2022 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 2022
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 2022 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 2022 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 2022 Proxy Statement.

Equity Compensation Plan Information
The following table sets forth certain compensation plan information with respect to compensation plans as of December 31, 2021:

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

479,333    $
—     
479,333    $

6.62     
—     
6.62     

Number of Securities
Available for Future
Issuance under Equity
Compensation Plans (2)  
4,318,050 
— 
4,318,050 

(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  2022  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 2022 Proxy Statement.

Item 14. Principal Accounting Fees and Services

The information required by this Item is incorporated by reference to the section titled "Fees Billed by PricewaterhouseCoopers, LLP" in our 2022

Proxy Statement.

69

 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
 
 
 
 
 
 
 
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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 April 14, 2016).

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).

72

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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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 Rule 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 Rule 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 Rule 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 Rule 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 Rule 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 Rule 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 Rule 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 Rule 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 Rule 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  Rule  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).

73

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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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 Rule 601(b)(10)
of Regulation S-K).

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.

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.

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.

10(tt)

10(uu)

10(vv)

10(ww)

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.

74

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Item 16. Form 10-K Summary

None.

75

 
 
 
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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed

on its behalf by the undersigned, thereunto duly authorized.

Date: March 3, 2022

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/ James J. Antal
James J. Antal

/s/ Jaymie Durnan
Jaymie Durnan

/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

  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

76

  Date
  March 3, 2022

  March 3, 2022

  March 3, 2022

  March 3, 2022

  March 3, 2022

  March 3, 2022

  March 3, 2022

  March 3, 2022

  March 3, 2022

  March 3, 2022

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
   
 
   
 
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
Certain information marked with “[***]” has been excluded from this exhibit because such information both (i) is not material and (ii) is the type that the
registrant treats as private or confidential.

Exhibit 10(tt)

AMENDMENT OF SOLICITATION/MODIFICATION OF
CONTRACT

1. CONTRACT ID
CODE

PAGE OF PAGES

       1  2

2. AMENDMENT/MODIFICATION NO.

P00006

6. ISSUED
BY         

3. EFFECTIVE
DATE

4. REQUISITION/PURCHASE REQ.
NO.
OS274901

5. PROJECT NO. (if
applicable)
ASPR-21-01075

See Block 16C

CODE  ASPR-BARDA

7.
ADMINISTERED
BY (if other than
Item 6)         

CODE  

ASPR-BARDA
200 Independence Ave., S.W.
Room 640-G
Washington DC 20201
8. NAME AND ADDRESS OF
CONTRACTOR (No., street, county, State and ZIP
Code)

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

(x)

9A. AMENDMENT OF SOLICITATION NO.

CODE 1385150

FACILITY CODE  

x

9B. DATED (SEE ITEM 11)
10A. MODIFICATION OF CONTRACT/ORDER
NO.
HHSO100201800019C
10B. DATED (SEE ITEM 13)
09/10/2018

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

☐  The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers   ☐ is extended.     ☐ is

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

12. ACCOUNTING AND APPROPRIATION DATA (if required)
See Schedule
13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS
DESCRIBED IN ITEM 14.

Net Increase:         $15,360.00

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE

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

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such
as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR
43.103(b).
C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:
52.217-7 Option for Increased Quantity – Separately Priced Line Item
D. OTHER (Specify type of modification and authority)

X

E. IMPORTANT:    Contractor    ☐ is not.    ☒ is required to sign this document and return 1 copies to the issuing office.
14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter
where feasible.)
Tax ID Number: 13-3864870
DUNS Number: 932651516
The purpose of this Firm Fixed-Price modification P00006 is to:
1)         Revise Article B.2 Base CLIN 0006 as indicated in detail below
2)         Revise Article G.1 – The Contracting Officer is changed from Rosemary Hill to James Harris
3)         Revise Article G.2 – The Contracting Officer’s Representative (COR) is changed from Dr. David Simon to Dr. Annie Xi Lu.
4)         All other terms and conditions remain unchanged as a result of this modification.

Amount obligated by Mod P0006: $         15,360.00 (CLIN 0006 PV lot delivery)
Continued …
Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains
unchanged and in full force and effect.

 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
15A. NAME AND TITLE OF SIGNER (Type or print)
Dennis E. Hruby, CSO & EVP

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or
print)
JAMES HARRIS

15B. CONTRACTOR/OFFEROR
/s/ Dennis E. Hruby
(Signature of person authorized to sign)
Previous edition unusable

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED
29 Apr 2021

4/26/2021

/s/ James Harris
(Signature of Contracting Officer)

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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
CONTINUATION
SHEET

REFERENCE NO. OF DOCUMENT BEING
CONTINUED
HHSO100201800019C/P00006

NAME OF OFFEROR OR CONTRACTOR
SIGA TECHNOLOGIES, INC. 1385150

PAGE 

OF

2

2

ITEM NO
(A)

SUPPLIES/SERVICES
(B)

QUANTITY
(C)

UNIT
(D)

UNIT PRICE
(E)

AMOUNT
(F)

Revised CX amount:         $178,821,655.00
Discount Terms: PSC NET 30P
Period of Performance: 09/10/2018 to 09/09/2028

Change Item 1 to read as follows (amount shown is
the obligated amount):

1

Base period funds for Procurement and Late-Stage
Development of Smallpox Antiviral Drug(s).

Accounting Info:
2018.199TWNP.26402 Appr. Yr.: 2018 CAN:
199TWNP Object Class: 26402
Funded: $0.00

Accounting Info:
2021.1990178.26088 Appr. Yr.: 2021 CAN: 1990178
Object Class: 26088
Funded: $15,360.00

Fixed Price CLIN 0006 under Article B.2, Base
period, is changed with supplemental funding changes
as follows:

“Supplies and Services”

From: Delivery of FDP to the SNS (from bulk drug
substance procured under CLIN0003)

To: Delivery of FDP to the SNS/USG designated
location (from bulk drug substance procured under
CLIN0003 and PV lots manufactured under
CLIN0001)

Truck delivery to SNS site [***]
Truck delivery to [***]
Audit of SNS site [***]

SNS project code: ASPR-20-01902; BARDA project
codes: ASPR-20-01588 and ASPR-20-02051; PSC:
AN13 NAICS: 541714 HHS/BARDA COR is Dr.
Annie Xi Lu, xi.lu@hhs.gov, (202) 604-5814.

NSN 7540-01-152-8067

15,360.00

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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

Exhibit 10(uu)

PAGE OF
PAGES
1

2

2. AMENDMENT/MODIFICATION
NO.
P00008
6. ISSUED BY          

3. EFFECTIVE DATE
See Block 16C

4. REQUISITION/PURCHASE REQ.
NO.

CODE ASPR—BARDA

7. ADMINISTERED BY (If other than
Item 6)         

5. PROJECT NO. (If
applicable)
ASPR-21-02282
CODE 

ASPR-BARDA
200 Independence Ave., S.W.
Room 640-G
Washington DC 20201
8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and
ZIP Code)

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

CODE         1385150

FACILITY CODE

(x) 9A. AMENDMENT OF SOLICITATION NO.

9B. DATED (SEE ITEM 11)

x 10A. MODIFICATION OF CONTRACT/ORDER NO.

HHSO100201800019C
10B. DATED (SEE ITEM 13)
09/10/2018

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

☐  The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers      ☐ is extended.     ☐ is not

extended.
Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following
methods: (a) By completing Items 8 and 15, and returning ______ copies of the amendment, (b) By acknowledging receipt of this amendment on
each copy of the offer submitted; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment
numbers.  FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS
PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to
change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication
makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

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

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

CHECK ONE

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

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE
ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET
FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).
C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY
OF:
FAR Part 43.103(a) — Bilateral Modifications.
D. OTHER (Specify type of modification and authority)

X

E. IMPORTANT:    Contractor    ☐ is not.    ☒ is required to sign this document and return 1 copies to the issuing office.
14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where
feasible.)
Tax ID Number: 13-3864870
DUNS Number: 932651516
The purpose of this no cost bilateral modification is to incorporate by Executive Order 14042 - FAR Deviation Clause 52.223-99, Ensuring Adequate
COVID Safety Protocols for Federal Contractors into Section I of the contract.
1. The following is hereby incorporated by full text, at no additional cost to the Government, into Section I:
52.223-99 Ensuring Adequate COVID-19 Safety Protocols for Federal Contractors.
ENSURING ADEQUATE COVID-19 SAFETY PROTOCOLS FOR FEDERAL CONTRACTORS (OCT 2021) (DEVIATION)
Continued ...
(a) Definition. As used in this clause -
Continued ...
Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged
and in full force and effect.
15A. NAME AND TITLE OF SIGNER (Type or
print)
Dennis E. Hruby, CSO & EVP
15B. CONTRACTOR/OFFEROR
/s/ Dennis E. Hruby
(Signature of person authorized to sign)

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or
print)
JAMES HARRIS
16B. UNITED STATES OF AMERICA 16C. DATE SIGNED
/s/ James Harris
(Signature of Contracting Officer)

15C. DATE SIGNED
08 Nov. 2021

12/09/2021

Previous edition unusable

STANDARD FORM 30
(REV. 11-2016)

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Prescribed by GSA FAR (48
CFR) 53.243

 
 
 
 
 
 
 
CONTINUATION
SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED
HHSO100201800019C/P00008

NAME OF OFFEROR OR CONTRACTOR
SIGA TECHNOLOGIES, INC. 1385150

ITEM NO
(A)

SUPPLIES/SERVICES
(B)

QUANTITY
(C)

UNIT
(D)

PAGE OF

2

2

UNIT
PRICE
(E)

AMOUNT
(F)

United States or its outlying areas means
(1) The fifty States;
(2) The District of Columbia;
(3) The commonwealths of Puerto Rico and the Northern
Mariana Islands;
(4) The territories of American Samoa, Guam, and the United
States Virgin Islands; and
(5) The minor outlying islands of Baker Island, Howland Island,
Jarvis Island, Johnston Atoll, Kingman Reef, Midway Islands,
Navassa Island, Palmyra Atoll, and Wake Atoll.
(b) Authority. This clause implements Executive Order 14042,
Ensuring Adequate COVID Safety Protocols for Federal
Contractors, dated September 9, 2021 (published in the Federal
Register on September 14, 2021, 86 FR 50985).
(c) Compliance. The Contractor shall comply with all guidance,
including guidance conveyed through Frequently Asked
Questions, as amended during the performance of this contract,
for contractor or subcontractor workplace locations published by
the Safer Federal Workforce Task Force (Task Force Guidance)
at https:/www.saferfederalworkforce.gov/contractors/.
(d) Subcontracts. The Contractor shall include the substance of
this clause, including this paragraph (d), in subcontracts at any
tier that exceed the simplified acquisition threshold, as defined in
Federal Acquisition Regulation 2.10 1 on the date of subcontract
award, and are for services, including construction, performed in
whole or in part within the United States or its outlying areas.
(End of clause)
2. The total amount, scope, period of performance and all other
terms and conditions of the contract remain unchanged.
3. By signing this modification, SIGA Technologies, Inc., hereby
releases the Government from any and all liability under this
contract for further equitable adjustments attributable to such fact
or circumstance giving rise to this modification.

Discount Terms: 1/30, NET 30P
Period of Performance: 01/01/2020 to 12/31/2021
-
SNS project code: ASPR-21-02282; BARDA project codes:
ASPR-20-01588 and
ASPR-20-02051; PSC: AN13 NAICS: 541714 HHS/BARDA
COR is Dr. Annie Xi Lu,
xi.lu@hhs.gov, (202) 604-5814.

NSN 7540-01-152-8067

END OF MODIFICATION

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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NO.
P00020

3. EFFECTIVE DATE
See Block 16C

6. ISSUED BY          

CODEASPR—BARDA

4.
REQUISITION/PURCHASE
REQ. NO.

5. PROJECT NO. (If
applicable)

7. ADMINISTERED BY (If
other than Item 6)

  CODE 

Exhibit 10(vv)

PAGE OF
PAGES

1 2    

ASPR-BARDA
200 Independence Ave., S.W.
Room 640-G
Washington DC 20201
8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP
Code)

SIGA TECHNOLOGIES, INC.  1385150
Attn:  Daniel Luckshire
SIGA TECHNOLOGIES, INC.         31 E 6
31 E 62ND ST
NEW YORK NY 100658014

CODE         1385150

FACILITY CODE

(x)

9A. AMENDMENT OF SOLICITATION NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER
NO.
HHSO100201100001C

x

10B. DATED (SEE ITEM 13)
05/13/2011

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

☐  The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers          ☐ is extended.     ☐ is not

extended.
Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following
methods: (a) By completing Items 8 and 15, and returning ______ copies of the amendment, (b) By acknowledging receipt of this amendment on each
copy of the offer submitted; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment
numbers.  FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS
PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to
change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication
makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (if required)
See Schedule
13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS
DESCRIBED IN ITEM 14.

CHECK ONE

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

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE
ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET
FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).
C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY
OF:
FAR Part 43.103(a) — Bilateral Modifications.
D. OTHER (Specify type of modification and authority)

X

E. IMPORTANT:    Contractor    ☐ is not.    ☒ is required to sign this document and return 1 copies to the issuing office.
14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter
where feasible.)
Tax ID Number: 13-3864870
DUNS Number: 932651516
A. The purpose of this no cost bilateral modification is to incorporate by Executive Order 14042 - FAR Deviation Clause 52.223-99, Ensuring
Adequate COVID Safety Protocols for Federal Contractors into Section I of the contract.

1. The following is hereby incorporated by full text, at no additional cost to the Government, into Section I:

52.223-99 Ensuring Adequate COVID-19 Safety Protocols for Federal Contractors.
ENSURING ADEQUATE COVID-19 SAFETY PROTOCOLS FOR FEDERAL CONTRACTORS (OCT 2021) (DEVIATION)
Continued ...
Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains
unchanged and in full force and effect.
15A. NAME AND TITLE OF SIGNER (Type or
print)
Dennis E. Hruby, CSO & EVP

16A. NAME AND TITLE OF CONTRACTING
OFFICER (Type or print)
John K. Warner

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
15B. CONTRACTOR/OFFEROR

15C. DATE SIGNED

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

08 Nov. 2021

16B. UNITED STATES OF
AMERICA
/s/ John K. Warner
(Signature of Contracting
Officer)

16C. DATE SIGNED

11/04/2021

Previous edition unusable

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

 
 
 
 
 
 
 
 
 
 
 
 
 
CONTINUATION
SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED
HHSO100201100001C/P00020

NAME OF OFFEROR OR CONTRACTOR
SIGA TECHNOLOGIES, INC. 1385150

ITEM NO
(A)

SUPPLIES/SERVICES
(B)

(a) Definition. As used in this clause -
United States or its outlying areas means

PAGE OF

2

2

QUANTITY
(C)

UNIT
(D)

UNIT
PRICE
(E)

AMOUNT
(F)

(1) The fifty States;
(2) The District of Columbia;
(3) The commonwealths of Puerto Rico and the Northern Mariana Islands;
(4) The territories of American Samoa, Guam, and the United States Virgin Islands; and
(5) The minor outlying islands of Baker Island, Howland Island, Jarvis Island, Johnston
Atoll, Kingman Reef, Midway Islands, Navassa Island, Palmyra Atoll, and Wake Atoll.

(b) Authority. This clause implements Executive Order 14042, Ensuring Adequate COVID
Safety Protocols for Federal Contractors, dated September 9, 2021 (published in the Federal
Register on September 14, 2021, 86 FR 50985).

(c) Compliance. The Contractor shall comply with all guidance, including guidance
conveyed through Frequently Asked Questions, as amended during the performance of this
contract, for contractor or subcontractor workplace locations published by the Safer Federal
Workforce Task Force (Task Force Guidance) at
https:/www.saferfederalworkforce.gov/contractors/.

(d) Subcontracts. The Contractor shall include the substance of this clause, including this
paragraph (d), in subcontracts at any tier that exceed the simplified acquisition threshold, as
defined in Federal Acquisition Regulation 2.101 on the date of subcontract award, and are
for services, including construction, performed in whole or in part within the United States
or its outlying areas.

(End of clause)

2. The total amount, scope, period of performance and all other terms and conditions of the
contract remain unchanged.

3. By signing this modification, SIGA TECHNOLOGIES, INC., hereby releases the
Government from any and all liability under this contract for further equitable adjustments
attributable to such fact or circumstance giving rise to this modification.
Discount Terms: HHS NET 14P
Period of Performance: 06/28/2016 to 09/21/2023
-
PSC: 6505 NAICS: 541714 COR is Dr. Annie Xi Lu, (202) 604-5814, Xi.Lu@hhs.gov

NSN 7540-01-152-8067

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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
AMENDMENT OF
SOLICITATION/MODIFICATION OF
CONTRACT

2.
AMENDMENT/MODIFICATION
NO.
P00022
6. ISSUED BY          

1. CONTRACT
ID CODE

Exhibit 10(ww)

PAGE OF
PAGES

1

2

3. EFFECTIVE DATE
See Block 16C

4.
REQUISITION/PURCHASE
REQ. NO.

  5. PROJECT NO. (If

applicable)
ASPR-20-02608

CODE HHS/OS/ASPR/BARDA 7. ADMINISTERED BY (If

 CODE ASPR—

other than Item 6)    

BARDA02

HHS/OS/ASPR/BARDA
330 Independence Ave.,  S.W.
Room 640-G
Washington DC 20201
8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

ASPR—BARDA
330 Independence Ave,         SW, Rm G640
Washington DC 20201

(x)

9A. AMENDMENT OF SOLICITATION
NO.

SIGA TECHNOLOGIES, INC.         1385150
SIGA TECHNOLOGIES, INC.         35 E 6
35 E 62ND ST
NEW YORK NY 100658014

CODE         1385150

9B. DATED (SEE ITEM 11)
10A. MODIFICATION OF
CONTRACT/ORDER NO.
HHSO100201100023C
10B. DATED (SEE ITEM 13)
06/01/2011
11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE

x

☐   The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers        ☐ is

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

12. ACCOUNTING AND APPROPRIATION DATA (if required)
See Schedule
13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS
DESCRIBED IN ITEM 14.

CHECK ONE

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

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE
ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN
ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).
C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:
FAR Part 43.103(a) — Bilateral Modifications.
D. OTHER (Specify type of modification and authority)

X

E. IMPORTANT:    Contractor    ☐ is not.    ☒ is required to sign this document and return 1 copies to the issuing office.
14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including
solicitation/contract subject matter where feasible.)
Tax ID Number: 13-3864870
DUNS Number: 932651516
A. The purpose of this no cost bilateral modification is to incorporate by Executive Order 14042 - FAR Deviation Clause
52.223-99, Ensuring Adequate COVID Safety Protocols for Federal Contractors into Section I of the contract.
1. The following is hereby incorporated by full text, at no additional cost to the Government, into Section I:
52.223-99 Ensuring Adequate COVID-19 Safety Protocols for Federal Contractors.
ENSURING ADEQUATE COVID-19 SAFETY PROTOCOLS FOR FEDERAL CONTRACTORS (OCT 2021)

(DEVIATION)

(a) Definition. As used in this clause -
United States or its outlying areas means
Continued ...
Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore
changed, remains unchanged and in full force and effect.
15A. NAME AND TITLE OF SIGNER (Type or print)
Dennis E. Hruby, CSO & EVP

16A. NAME AND TITLE OF CONTRACTING
OFFICER
(Type or print)
John K. Warner
16B. UNITED STATES OF   16C. DATE  

15B. CONTRACTOR/OFFEROR

15C. DATE SIGNED

 
 
 
 
   
 
 
 
   
 
 
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
/s/ Dennis E. Hruby

08 Nov. 2021

(Signature of person authorized to sign)

Previous edition unusable

AMERICA
/s/ John K. Warner
(Signature of Contracting
Officer)

SIGNED
  11/05/2021  

  STANDARD FORM
30 (REV. 11-2016)

  Prescribed by

GSA FAR (48 CFR)
53.243

 
 
 
 
 
 
 
 
 
 
 
 
 
 
CONTINUATION
SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED
HHSO100201100023C/P00022

NAME OF OFFEROR OR CONTRACTOR
SIGA TECHNOLOGIES, INC. 1385150

ITEM NO
(A)

SUPPLIES/SERVICES
(B)

PAGE OF

2

 2

QUANTITY
(C)

UNIT
(D)

UNIT
PRICE
(E)

AMOUNT
(F)

(1) The fifty States;
(2) The District of Columbia;
(3) The commonwealths of Puerto Rico and the Northern Mariana Islands;
(4) The territories of American Samoa, Guam, and the United States
Virgin Islands; and
(5) The minor outlying islands of Baker Island, Howland Island, Jarvis
Island, Johnston Atoll, Kingman Reef, Midway Islands, Navassa Island,
Palmyra Atoll, and Wake Atoll.
(b) Authority. This clause implements Executive Order 14042, Ensuring
Adequate COVID Safety Protocols for Federal Contractors, dated
September 9, 2021 (published in the Federal Register on September 14,
2021, 86 FR 50985).
(c) Compliance. The Contractor shall comply with all guidance, including
guidance conveyed through Frequently Asked Questions, as amended
during the performance of this contract, for contractor or subcontractor
workplace locations published by the Safer Federal Workforce Task Force
(Task Force Guidance) at
https:/www.saferfederalworkforce.gov/contractors/.
(d) Subcontracts. The Contractor shall include the substance of this clause,
including this paragraph (d), in subcontracts at any tier that exceed the
simplified acquisition threshold, as defined in Federal Acquisition
Regulation 2.10 1 on the date of subcontract award, and are for services,
including construction, performed in whole or in part within the United
States or its outlying areas.
(End of clause)
2. The total amount, scope, period of performance and all other terms and
conditions of the contract remain unchanged.
3. By signing this modification, SIGA TECHNOLOGIES, INC., hereby
releases the Government from any and all liability under this contract for
further equitable adjustments attributable to such fact or circumstance
giving rise to this modification.
Discount Terms: 1/30, NET 30P
Period of Performance: 05/15/2011 to 02/08/2024
-
PSC: AN13 NAICS: 541711 COR is Annie Lu, Ph.D. (202) 604-5814,
Xi.Lu@hhs.gov

NSN 7540-01-152-
8067

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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-218507, 333-183101, and 333-167329) of SIGA
Technologies, Inc. of our report dated March 3, 2022 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 3, 2022

 
 
 
 
 
 
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 3, 2022

/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 3, 2022

/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, 2021 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 3, 2022

 
 
 
 
 
 
 
 
 
 
 
 
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, 2021 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 3, 2022