This Quarterly Report on Form 10-Q contains forward-looking statements that
involve risks and uncertainties relating to future events and the future
performance of Regeneron Pharmaceuticals, Inc. (where applicable, together with
its subsidiaries, "Regeneron," "Company," "we," "us," and "our"), and actual
events or results may differ materially from these forward-looking
statements. Words such as "anticipate," "expect," "intend," "plan," "believe,"
"seek," "estimate," variations of such words, and similar expressions are
intended to identify such forward-looking statements, although not all
forward-looking statements contain these identifying words. These statements
concern, and these risks and uncertainties include, among others, the impact of
SARS-CoV-2 (the virus that has caused the COVID-19 pandemic) on Regeneron's
business and its employees, collaborators, and suppliers and other third parties
on which Regeneron relies, Regeneron's and its collaborators' ability to
continue to conduct research and clinical programs, Regeneron's ability to
manage its supply chain, net product sales of products marketed or otherwise
commercialized by Regeneron and/or its collaborators or licensees (collectively,
"Regeneron's Products"), and the global economy; the nature, timing, and
possible success and therapeutic applications of Regeneron's Products and
product candidates being developed by Regeneron and/or its collaborators or
licensees (collectively, "Regeneron's Product Candidates") and research and
clinical programs now underway or planned, including without limitation
EYLEA® (aflibercept) Injection, Dupixent® (dupilumab) Injection, Libtayo®
(cemiplimab) Injection, Praluent® (alirocumab) Injection, Kevzara® (sarilumab)
Injection, Evkeeza® (evinacumab), Inmazeb® (atoltivimab, maftivimab, and
odesivimab-ebgn), REGEN-COV® (casirivimab and imdevimab), aflibercept 8 mg,
fasinumab, pozelimab, odronextamab, itepekimab, fianlimab, REGN5458,
REGN5713-5714-5715, REGN1908-1909, Regeneron's other oncology programs
(including its costimulatory bispecific portfolio), Regeneron's and its
collaborators' earlier-stage programs, and the use of human genetics in
Regeneron's research programs; the likelihood and timing of achieving any of our
anticipated development milestones referenced in this report; safety issues
resulting from the administration of Regeneron's Products and Regeneron's
Product Candidates in patients, including serious complications or side effects
in connection with the use of Regeneron's Products and Regeneron's Product
Candidates in clinical trials; the likelihood, timing, and scope of possible
regulatory approval and commercial launch of our late-stage product candidates
and new indications for Regeneron's Products, including without limitation those
listed above; the extent to which the results from the research and development
programs conducted by us and/or our collaborators may be replicated in other
studies and/or lead to advancement of product candidates to clinical trials,
therapeutic applications, or regulatory approval; ongoing regulatory obligations
and oversight impacting Regeneron's Products, research and clinical programs,
and business, including those relating to patient privacy; determinations by
regulatory and administrative governmental authorities which may delay or
restrict our ability to continue to develop or commercialize Regeneron's
Products and Regeneron's Product Candidates; competing drugs and product
candidates that may be superior to, or more cost effective than, Regeneron's
Products and Regeneron's Product Candidates; uncertainty of the utilization,
market acceptance, and commercial success of Regeneron's Products and
Regeneron's Product Candidates and the impact of studies (whether conducted by
Regeneron or others and whether mandated or voluntary) or recommendations and
guidelines from governmental authorities and other third parties on the
commercial success of Regeneron's Products and Regeneron's Product Candidates;
our ability to manufacture and manage supply chains for multiple products and
product candidates; the ability of our collaborators, suppliers, or other third
parties (as applicable) to perform manufacturing, filling, finishing, packaging,
labeling, distribution, and other steps related to Regeneron's Products and
Regeneron's Product Candidates; the availability and extent of reimbursement of
Regeneron's Products from third-party payors, including private payor healthcare
and insurance programs, health maintenance organizations, pharmacy benefit
management companies, and government programs such as Medicare and Medicaid;
coverage and reimbursement determinations by such payors and new policies and
procedures adopted by such payors; unanticipated expenses; the costs of
developing, producing, and selling products; our ability to meet any of our
financial projections or guidance, including without limitation capital
expenditures, and changes to the assumptions underlying those projections or
guidance; the potential for any license or collaboration agreement, including
our agreements with Sanofi, Bayer, and Teva Pharmaceutical Industries Ltd. (or
their respective affiliated companies, as applicable), as well as Regeneron's
agreement with Roche relating to the casirivimab and imdevimab antibody cocktail
(known as REGEN-COV in the United States and Ronapreve™ in other countries), to
be cancelled or terminated; the likelihood that any planned or future
acquisitions, business combinations, or other related transactions, such as
Regeneron's planned acquisition of Checkmate Pharmaceuticals, Inc. discussed in
this report, will close within the expected time period or at all and whether
and to what extent Regeneron will realize any anticipated benefits of any such
transaction; and risks associated with intellectual property of other parties
and pending or future litigation relating thereto (including without limitation
the patent litigation and other related proceedings relating to EYLEA, Dupixent,
Praluent, and REGEN-COV described further in Note 13 to our Condensed
Consolidated Financial Statements included in this report), other litigation and
other proceedings and government investigations relating to the Company and/or
its operations (including without limitation those described in Note 13 to our
Condensed Consolidated Financial Statements included in this report), the
ultimate outcome of any such proceedings and investigations, and the impact any
of the foregoing may have on our business, prospects, operating results, and
financial condition. These statements are made based on management's current
beliefs and judgment, and the reader is cautioned not to rely on any such
statements. In evaluating such statements, shareholders and potential investors

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should specifically consider the various factors identified under Part II, Item
1A. "Risk Factors," which could cause actual events and results to differ
materially from those indicated by such forward-looking statements. We do not
undertake any obligation to update (publicly or otherwise) any forward-looking
statement, whether as a result of new information, future events, or otherwise.

Overview

Regeneron Pharmaceuticals, Inc. is a fully integrated biotechnology company that
invents, develops, manufactures, and commercializes medicines for people with
serious diseases. Our products and product candidates in development are
designed to help patients with eye diseases, allergic and inflammatory diseases,
cancer, cardiovascular and metabolic diseases, pain, hematologic conditions,
infectious diseases, and rare diseases.

Our core business strategy is to maintain a strong foundation in basic
scientific research and discovery-enabling technologies, and to build on that
foundation with our clinical development, manufacturing, and commercial
capabilities. Our objective is to continue to be an integrated, multi-product
biotechnology company that provides patients and medical professionals with
important medicines for preventing and treating human diseases.

Selected financial information is summarized as follows:



                                                           Three Months Ended
                                                               March 31,
             (In millions, except per share data)         2022           2021
             Revenues                                  $ 2,965.1      $ 2,528.7
             Net income                                $   973.5      $ 1,115.2
             Net income per share - diluted            $    8.61      $   10.09


For purposes of this report, references to our products encompass products
marketed or otherwise commercialized by us and/or our collaborators or licensees
and references to our product candidates encompass product candidates in
development by us and/or our collaborators or licensees (in the case of
collaborated or licensed products or product candidates under the terms of the
applicable collaboration or license agreements), unless otherwise stated or
required by the context.

Products



Products that have received marketing approval are summarized in the table
below.

                                                                                                      Territory
           Product                                Disease                       U.S.             EU            Japan            ROW(d)
EYLEA (aflibercept)             -   Neovascular age-related macular               a              a               a                a
Injection(a)                        degeneration ("wet AMD")
                                -   Diabetic macular edema ("DME")                a              a               a                a
                                -   Macular edema following retinal               a              a               a                a
                                    vein occlusion ("RVO"), which
                                    includes macular edema following
                                    central retinal vein occlusion
                                    ("CRVO") and macular edema
                                    following branch retinal vein
                                    occlusion ("BRVO")
                                -   Myopic choroidal neovascularization                          a               a                a
                                    ("mCNV")
                                -   Diabetic retinopathy                          a
                                -   Neovascular glaucoma ("NVG")                                                 a
Dupixent (dupilumab)            -   Atopic dermatitis (in adults and              a              a               a                a
Injection(b)                        adolescents)
                                -   Atopic dermatitis (in pediatrics              a              a                                a
                                    6-11 years of age)
                                -   Asthma (in adults and adolescents)            a              a               a                a
                                -   Asthma (in pediatrics 6-11 years of           a              a
                                    age)


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                                                                                                            Territory
      Product (continued)                              Disease                        U.S.             EU            Japan            ROW(d)
Dupixent (dupilumab)               -    Chronic rhinosinusitis with nasal               a              a               a                a
Injection(b) (continued)                polyposis ("CRSwNP")
Libtayo (cemiplimab)               -    Metastatic or locally advanced                  a              a                                a
Injection(b)                            first-line non-small cell lung cancer
                                        ("NSCLC")
                                   -    Metastatic or locally advanced basal            a              a                                a
                                        cell carcinoma ("BCC")
                                   -    Metastatic or locally advanced                  a              a                                a
                                        cutaneous squamous cell carcinoma
                                        ("CSCC")
                                   -    Metastatic or recurrent second-line                                                             a
                                        cervical cancer
Praluent (alirocumab)              -    LDL-lowering in heterozygous familial           a              a                                a
Injection(c)                            hypercholesterolemia ("HeFH") or
                                        clinical atherosclerotic
                                        cardiovascular disease ("ASCVD")
                                   -    Cardiovascular risk reduction in                a              a                                a
                                        patients with established
                                        cardiovascular disease
                                   -    Homozygous familial                             a
                                        hypercholesterolemia ("HoFH")
REGEN-COV(e)                       -    COVID-19                                                       a               a                a

Kevzara (sarilumab) Solution for - Rheumatoid arthritis ("RA")


            a              a               a                a
Subcutaneous Injection(b)
Evkeeza (evinacumab)               -    HoFH (in adults and adolescents)                a              a
Injection(f)
Inmazeb (atoltivimab,              -    Infection caused by Zaire ebolavirus            a
maftivimab, and odesivimab-ebgn)
Injection
ARCALYST® (rilonacept) Injection   -    Cryopyrin-associated periodic                   a
for Subcutaneous Use(g)                 syndromes ("CAPS"), including
                                        familial cold auto-inflammatory
                                        syndrome ("FCAS") and Muckle-Wells
                                        syndrome ("MWS") (in adults and
                                        adolescents)
                                   -    Deficiency of interleukin-1 receptor            a
                                        antagonist ("DIRA") (in adults and
                                        pediatrics)
                                   -    Recurrent pericarditis (in adults and           a
                                        adolescents)
ZALTRAP® (ziv-aflibercept)         -    Metastatic colorectal cancer ("mCRC")           a              a               a                a
Injection for Intravenous
Infusion(h)

Note: Refer to "Net Product Sales of Regeneron-Discovered Products" section below for information regarding whether net product sales for a
particular product are recorded by us or others. In addition, unless otherwise noted, products in the table above are approved for use in
adults in the above-referenced diseases.
(a) In collaboration with Bayer outside the United States
(b) In collaboration with Sanofi
(c) The Company is solely responsible for the development and commercialization of Praluent in the United States, and Sanofi is solely
responsible for the development and commercialization of Praluent outside of the United States.
(d) Rest of world ("ROW"). A checkmark in this column indicates that the product has received marketing approval in at least one country
outside of the United States, European Union ("EU"), or Japan.
(e) Known as REGEN-COV in the United States and Ronapreve in other countries
(f) In January 2022, the Company entered into a license and collaboration agreement for Ultragenyx to develop and commercialize Evkeeza
outside of the United States.


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(g) Kiniksa is solely responsible for the development and commercialization of ARCALYST. (h) Sanofi is solely responsible for the development and commercialization of ZALTRAP.

REGEN-COV - Emergency and Temporary Use Authorizations



REGEN-COV has not been approved by the U.S. Food and Drug Administration
("FDA"), but is currently authorized under an Emergency Use Authorization
("EUA") for use in certain post-exposure prophylaxis settings and as a treatment
for people with mild to moderate COVID-19 who are at high risk of serious
consequences from COVID-19. The EUA is temporary and does not replace a formal
Biologics License Application ("BLA") submission review and approval process.
This use is authorized only for the duration of the declaration that
circumstances exist justifying the authorization of the emergency use, unless
terminated or revoked sooner.

Based on laboratory data that showed markedly decreased binding to the Omicron
spike protein, REGEN-COV is highly unlikely to be active against the
Omicron-lineage variants. In January 2022, the FDA revised the EUA for REGEN-COV
to exclude its use in geographic regions where, based on available information
including variant susceptibility and regional variant frequency, infection or
exposure is likely due to a variant such as an Omicron-lineage variant that is
not susceptible to the treatment. With this EUA revision, REGEN-COV is not
currently authorized for use in any U.S. states, territories, or jurisdictions,
since Omicron-lineage variants are currently dominant across the United States.
If, in the future, patients in certain geographic regions are likely to be
infected or exposed to a variant that is susceptible to REGEN-COV, then the
limitation on use may be revised in these areas.

Emergency or temporary pandemic use authorizations are also currently in place in numerous other countries outside the United States.

Net Product Sales of Regeneron-Discovered Products



                                                                        Three Months Ended
                                                                             March 31,
                                                    2022                                                   2021                                % Change
(In millions)                     U.S.              ROW              Total               U.S.              ROW              Total           (Total Sales)
EYLEA(a)                      $ 1,517.6          $ 868.5          $ 2,386.1          $ 1,347.0          $ 811.2  *       $ 2,158.2                   11  %
Dupixent(b)                   $ 1,325.6          $ 484.8          $ 1,810.4          $   961.5          $ 301.4          $ 1,262.9                   43  %
Libtayo(c)                    $    78.9          $  45.8          $   124.7          $    69.1          $  31.7          $   100.8                   24  %
Praluent(d)                   $    33.6          $  77.8          $   111.4          $    43.3          $  61.3          $   104.6                    7  %
REGEN-COV(e)                  $       -          $ 635.6          $   635.6          $   262.2          $ 176.6          $   438.8                   45  %
Kevzara(b)                    $    57.0          $  49.4          $   106.4          $    30.7          $  38.4          $    69.1                   54  %
Other products(f)             $     9.9          $  20.4          $    30.3          $     4.1          $  23.0          $    27.1                   12  %

* Effective January 1, 2022, the Company and Bayer commenced sharing equally in profits and losses based on sales from Bayer to its distributor in Japan.
Previously, the Company received from Bayer a tiered percentage of sales based on sales by Bayer's distributor in Japan. Consequently, the prior year net
product sales amount has been revised for comparability purposes.
(a) Regeneron records net product sales of EYLEA in the United States. Bayer records net product sales of EYLEA outside the United States. The Company
records its share of profits/losses in connection with sales of EYLEA outside the United States.
(b) Sanofi records global net product sales of Dupixent and Kevzara. The Company records its share of profits/losses in connection with global sales of
Dupixent and Kevzara.
(c) Regeneron records net product sales of Libtayo in the United States and Sanofi records net product sales of Libtayo outside the United States. The
parties equally share profits/losses in connection with global sales of Libtayo.
(d) Regeneron records net product sales of Praluent in the United States. Sanofi records net product sales of Praluent outside the United States and pays
the Company a royalty on such sales.
(e) Regeneron records net product sales of REGEN-COV in connection with its agreements with the U.S. government. Roche records net product sales of the
antibody cocktail outside the United States and the parties share gross profits from global sales based on a pre-specified formula.
(f) Included in this line item are products which are sold by the Company and others. Refer to "Results of Operations - Revenues" below for a complete
listing of net product sales recorded by the Company. In addition, not included in this line item are net product sales of ARCALYST subsequent to the
first quarter of 2021, which are recorded by Kiniksa; net product sales of ARCALYST were $18.7 million for the fourth quarter of 2021.


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Programs in Clinical Development

Product candidates in clinical development, which are being developed by us and/or our collaborators, are summarized in the table below.



There are numerous uncertainties associated with drug development, including
uncertainties related to safety and efficacy data from each phase of drug
development (including any post-approval studies), uncertainties related to the
enrollment and performance of clinical trials, changes in regulatory
requirements, changes to drug pricing and reimbursement regulations and
requirements, and changes in the competitive landscape affecting a product
candidate. The planning, execution, and results of our clinical programs are
significant factors that can affect our operating and financial results.

Refer to Part II, Item 1A. "Risk Factors" for a description of risks and uncertainties that may affect our clinical programs. Any of such risks and uncertainties may, among other matters, negatively impact the development timelines set forth in the table below.


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                                                                                                                                                                              Select Upcoming
      Clinical Program                  Phase 1                 Phase 2                     Phase 3              Regulatory Review(h)         2022 Events to Date               Milestones

                                                                                          Ophthalmology

EYLEA (aflibercept)(a)                                                               -Retinopathy of             -ROP (EU and Japan)                                      -Report results from
                                                                                     prematurity                                                                          Phase 3 study in ROP
                                                                                     ("ROP")(c)                  -Every-16-weeks                                          (second half 2022)
                                                                                                                 dosing regimen in
                                                                                                                 patients with                                            -FDA decision on
                                                                                                                 non-proliferative                                        supplemental BLA
                                                                                                                 diabetic retinopathy                                     ("sBLA") for
                                                                                                                 ("NPDR")                                                 every-16-weeks dosing
                                                                                                                                                                          regimen in patients
                                                                                                                                                                          with NPDR (first half
                                                                                                                                                                          2023)
Aflibercept 8 mg(a)                                                                  -Wet AMD                                                -Reported detailed           -Report results from
                                                                                                                                             results from Phase 2         Phase 3 studies in wet
                                                                                     -DME                                                    trial in wet AMD             AMD and DME (second
                                                                                                                                                                          half 2022)

                                                                                    Immunology & Inflammation

Dupixent (dupilumab)(b)                                   -Peanut allergy   

-Atopic dermatitis in -Atopic dermatitis in -Approved by European -FDA decision on sBLA Antibody to IL-4R alpha

                                                              pediatrics (6               pediatrics (6               Commission ("EC") for        (target action date of
subunit                                                   -Grass allergy             months-5 years of           months-5 years of           severe asthma in             June 9, 2022) and EC
                                                                                     age) (Phase 2/3)(d)         age) (U.S. and EU)          pediatrics (6-11 years       decision on regulatory
                                                                                                                                             of age)                      submission (first half
                                                                                     -Eosinophilic               -EoE in adults and                                       2023) for atopic
                                                                                     esophagitis                 adolescents (U.S. and       -Reported

that second dermatitis in pediatric


         ("EoE")(c) in               EU)                         Phase 3 trial in             patients (6 months-5
                                                                                     adults(d),                                              prurigo

nodularis met years of age)

adolescents(d), and -Prurigo nodularis its primary and key


                                                                                     pediatrics                  (U.S. and EU)               secondary endpoints          -Submit regulatory
                                                                                                                                                                          application in Japan
                                                                                     -Chronic obstructive                                    -Stopped

one of the for atopic dermatitis


         pulmonary disease                                       Phase 3

trials in CSU        in pediatric and
                                                                                     ("COPD")                                                (in patients                 adolescent patients (6
                                                                                                                                             refractory to                months-14 years of age)
                                                                                     -Bullous pemphigoid                                     omalizumab) due to           (second half 2022)
                                                                                     (Phase 2/3)(c)                                          futility, based on
                                                                                                                                             pre-specified interim        -FDA decision on sBLA
                                                                                     -Chronic spontaneous                                    analysis                     (target action date of
                                                                                     urticaria ("CSU")                                                                    August 3, 2022) and EC
                                                                                                                                                                          decision on regulatory
                                                                                     -Prurigo nodularis                                                                   submission (first half
                                                                                                                                                                          2023) for EoE in adults
                                                                                     -Allergic                                                                            and adolescents
                                                                                     bronchopulmonary
                                                                                     aspergillosis                                                                        -Report results from
                                                                                     ("ABPA")                                                                             Phase 3 study for EoE
                                                                                                                                                                          in pediatrics
                                                                                                                                                                          (mid-2022)


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                                                                                                                            Regulatory                                               Select Upcoming
Clinical Program (continued)            Phase 1                     Phase 2                       Phase 3                   Review(h)               2022 Events to Date                Milestones
Dupixent (dupilumab)(b)                                                                    -Chronic inducible                                                                    -Report initial results
(continued)                                                                                urticaria - cold                                                                      from Phase 3 study in
                                                                                                                                                                                 COPD (first half 2023)
                                                                                           -Chronic
                                                                                           rhinosinusitis without                                                                -FDA decision on sBLA
                                                                                           nasal polyposis                                                                       (fourth quarter
                                                                                                                                                                                 2022/first quarter
                                                                                           -Allergic fungal                                                                      2023) and EC decision
                                                                                           rhinosinusitis                                                                        on regulatory
                                                                                                                                                                                 submission (first half
                                                                                           -Chronic pruritis of                                                                  2023) for prurigo
                                                                                           unknown origin                                                                        nodularis

                                                                                                                                                                                 -Report results from
                                                                                                                                                                                 Phase 3 study in
                                                                                                                                                                                 chronic inducible
                                                                                                                                                                                 urticaria - cold
                                                                                                                                                                                 (second half 2022)

                                                                                                                                                                                 -Report results from
                                                                                                                                                                                 Phase 2 study in peanut
                                                                                                                                                                                 allergy (second half
                                                                                                                                                                                 2022)

Kevzara (sarilumab)(b)                                     -Polyarticular-course
Antibody to IL-6R                                          juvenile idiopathic
                                                           arthritis ("pcJIA")

                                                           -Systemic juvenile
                                                           idiopathic arthritis
                                                           ("sJIA")
Itepekimab(b) (REGN3500)                                                                   -COPD
Antibody to IL-33
REGN1908-1909(f)                                                                           -Cat allergy
Multi-antibody therapy to Fel
d 1
REGN5713-5714-5715                                                                         -Birch allergy
Multi-antibody therapy to Bet
v 1

                                                                                          Solid Organ Oncology

Libtayo (cemiplimab)(b)(g)                                 -Metastatic or locally          -First-line NSCLC,           -Second-line             -Voluntarily withdrew           -FDA decision on sBLA
Antibody to PD-1                                           advanced CSCC(d)                chemotherapy                 cervical cancer          sBLA 

for cervical cancer (target action date of


                                                                                           combination                  (EU and Japan)           due to inability to align       September 19, 2022) and
                                                           -Neoadjuvant CSCC                                                                     with FDA on certain             EC decision on
                                                                                           -Second-line cervical                                 

post-marketing studies regulatory submission


                                                                                           cancer(e)                                                                             for NSCLC, chemotherapy
                                                                                                                                                                                 combination (second
                                                                                           -Adjuvant CSCC                                                                        half 2022)


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     Clinical Program                                                                                                     Regulatory
       (continued)                       Phase 1                      Phase 2                    Phase 3                  Review(h)                 2022 Events to Date            Select Upcoming Milestones
Libtayo (cemiplimab)(b)(g)                                      -Second-line                                          -First-line NSCLC,                                           -EC decision on regulatory
(continued)                                                     cervical cancer,                                      chemotherapy                                                 submission for cervical
                                                                ISA101b combination                                   combination (U.S.                                            cancer (second half 2022)
                                                                                                                      and EU)
REGN4018(f)                      -Platinum-resistant                                                                                                                               -Report results from Phase
Bispecific antibody              ovarian cancer                                                                                                                                    1 study in
targeting MUC16 and CD3                                                                                                                                                            platinum-resistant ovarian
                                                                                                                                                                                   cancer (second half 2022)
REGN5668                         -Platinum-resistant
Bispecific antibody              ovarian cancer
targeting MUC16 and CD28
REGN5678                         -Prostate cancer                                                                                                                                  -Report results from Phase
Bispecific antibody                                                                                                                                                                1 study in prostate cancer
targeting PSMA and CD28                                                                                                                                                            (second half 2022)
REGN4336                         -Prostate cancer
Bispecific antibody
targeting PSMA and CD3
REGN5093                         -MET-altered advanced                                                                                                                             -Report results from Phase
Bispecific antibody              NSCLC                                                                                                                                             1 study in MET-altered
targeting two distinct MET                                                                                                                                                         advanced NSCLC (second half
epitopes                                                                                                                                                                           2022)
REGN5093-M114                    -MET overexpressing
Bispecific antibody-drug         advanced cancer
conjugate targeting two
distinct MET epitopes
Fianlimab(f)                     -Solid tumors and                                        -First-line                                                                              -Initiate Phase 3 study in
(REGN3767)                       advanced hematologic                                     metastatic melanoma                                                                      first-line adjuvant
Antibody to LAG-3                malignancies                                                                                                                                      melanoma (second half 2022)
REGN6569                         -Solid tumors
Antibody to GITR
REGN7075                         -Solid tumors
Bispecific antibody
targeting EGFR and CD28

                                                                                                  Hematology

Odronextamab (REGN1979)          -Certain B-cell                -B-cell non-Hodgkin                                                                                                -Report additional results
Bispecific antibody              malignancies(c)(o)             lymphoma                                                                                                           from potentially pivotal
targeting CD20 and CD3                                          ("B-NHL")(o)                                                                                                       Phase 2 study in B-NHL and
                                                                (potentially                                                                                                       submit BLA (second half
                                                                pivotal study)                                                                                                     2022)


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   Clinical Program                                                                                                                                                              Select Upcoming
      (continued)                   Phase 1                     Phase 2                      Phase 3                 Regulatory Review(h)         2022 Events to Date              Milestones
Odronextamab (REGN1979)                                                                                                                                                      -Initiate Phase 3
(continued)                                                                                                                                                                  program (second half
                                                                                                                                                                             2022)
REGN5458(f)                                              -Multiple myeloma                                                                                                   -Complete enrollment in
Bispecific antibody                                      (potentially pivotal                                                                                                potentially pivotal
targeting BCMA and CD3                                   study)                                                                                                              Phase 2 study in
                                                                                                                                                                             multiple myeloma
                                                                                                                                                                             (second half 2022)

                                                                                                                                                                             -Report results from
                                                                                                                                                                             potentially pivotal
                                                                                                                                                                             Phase 2 study in
                                                                                                                                                                             multiple myeloma (2023)

                                                                                                                                                                             -Expand into earlier
                                                                                                                                                                             lines of therapy for
                                                                                                                                                                             multiple myeloma (first
                                                                                                                                                                             half 2022)
REGN5459(f)                   -Transplant
Bispecific antibody           desensitization in
targeting BCMA and CD3        patients with
                              chronic kidney
                              disease
Pozelimab(f) (REGN3918)                                  -CD55-deficient             -Myasthenia gravis,                                                                     -Submit BLA for
Antibody to C5; studied                                  protein-losing              cemdisiran                                                                              CD55-deficient
as monotherapy and in                                    enteropathy,                combination(m)                                                                          protein-losing
combination with                                         monotherapy(c)                                                                                                      enteropathy,
cemdisiran                                               (potentially pivotal        -Paroxysmal nocturnal                                                                   monotherapy (second
                                                         study)                      hemoglobinuria ("PNH"),                                                                 half 2022)
                                                                                     cemdisiran
                                                                                     combination(c)(m)
Cemdisiran(m)                                            -Immunoglobulin A
siRNA therapeutic                                        nephropathy
targeting C5
REGN7257                      -Aplastic anemia
Antibody to IL2Rg
NTLA-2001(l)                  -Transthyretin                                                                                                      -Reported updated
TTR gene knockout using       ("ATTR")                                                                                                            positive interim
CRISPR/Cas9                   amyloidosis(c)                                                                                                      data from Phase 1
                                                                                                                                                  trial in ATTR
REGN9933                      -Thrombosis
Antibody to Factor XI


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  Clinical Program (continued)                   Phase 1                         Phase 2                          Phase 3                 Regulatory Review(h)          2022 Events to Date          Select Upcoming Milestones

                                                                                                       General Medicine

REGEN-COV (casirivimab and                                                                              -COVID-19 treatment in            -COVID-19 

treatment -Submitted additional -FDA decision on BLA imdevimab)(e)(j)(k)

                                                                                     hospitalized patients             of non-hospitalized         data to the FDA from           (target action date 

of


Multi-antibody therapy to                                                                                                                 patients and pre-and        prophylaxis trial;             July 13, 2022) for
SARS-CoV-2 virus                                                                                        -COVID-19 prevention              post-exposure               considered Major               COVID-19 treatment of
                                                                                                                                          prophylaxis (U.S.)          Amendment to the BLA and       non-hospitalized patients
                                                                                                                                                                      target action date             and prevention
                                                                                                                                          -COVID-19 treatment         extended by three months
                                                                                                                                          of hospitalized                                            -EC decision on regulatory
                                                                                                                                          patients (EU)               -FDA revised EUA to            submission for COVID-19
                                                                                                                                                                      exclude use in                 treatment of hospitalized
                                                                                                                                                                      geographic regions where       patients (second half
                                                                                                                                                                      infection or exposure is       2022)
                                                                                                                                                                      likely due to a variant
                                                                                                                                                                      that is not susceptible
                                                                                                                                                                      to the treatment
"Next Generation" Covid                 -Healthy volunteers

Antibodies


Antibodies to SARS-CoV-2 variants
Praluent (alirocumab)                                                                                   -HeFH in pediatrics
Antibody to PCSK9
Fasinumab(i)(f) (REGN475)                                                                               -Osteoarthritis pain of the                                                                  -Continue discussions with
Antibody to NGF                                                                                         knee or hip(e)                                                                               regulatory authorities and
                                                                                                                                                                                                     determine next steps for
                                                                                                                                                                                                     the program (mid-2022)
Evkeeza (evinacumab)(f)(n)                                              -Acute pancreatitis
Antibody to ANGPTL3                                                     prevention
Garetosmab(f) (REGN2477)                                                -Fibrodysplasia                                                                                                              -Initiate Phase 3 study in
Antibody to Activin A                                                   ossificans progressiva                                                                                                       FOP (second half 2022)
                                                                        ("FOP")(c)(d)(e)
REGN4461(f)                                                             -Generalized
Agonist antibody to leptin                                              lipodystrophy(e)
receptor ("LEPR")
                                                                        -Partial lipodystrophy
REGN5381/REGN9035                       -Heart failure
Agonist antibody to NPR1/reversal
agent to REGN5381


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   Clinical Program
     (continued)                       Phase 1                      Phase 2               Phase 3            Regulatory Review(h)            2022 Events to Date             Select Upcoming Milestones
ALN-HSD(m)                   -Nonalcoholic
RNAi therapeutic             steatohepatitis
targeting HSD17B13           ("NASH")
ALN-APP(m)                   -Early-onset Alzheimer's
RNAi therapeutic             disease
targeting APP


Note 1: For purposes of the table above, a program is classified in Phase 1, 2, or 3 clinical
development after recruitment for the corresponding study or studies has commenced.
Note 2: We have discontinued further clinical development of REGN6490, an antibody to IL-36R,
which was previously being studied in palmo-plantar pustulosis.
(a) In collaboration with Bayer outside the United States
(b) In collaboration with Sanofi
(c) FDA granted orphan drug designation
(d) FDA granted Breakthrough Therapy designation
(e) FDA granted Fast Track designation
(f) Sanofi did not opt-in to or elected not to continue to co-develop the product candidate.
Under the terms of our agreement, Sanofi is entitled to receive royalties on sales of the
product, if any.
(g) Studied as monotherapy and in combination with other antibodies and treatments
(h) Information in this column relates to U.S., EU, and Japan regulatory submissions only
(i) In collaboration with Teva and Mitsubishi Tanabe Pharma
(j) Certain trials conducted with the National Institute of Allergy and Infectious Diseases
("NIAID"), part of the National Institutes of Health ("NIH")
(k) In collaboration with Roche outside the United States
(l) In collaboration with Intellia
(m) In collaboration with Alnylam
(n) In collaboration with Ultragenyx outside the United States
(o) FDA granted Fast Track designation for follicular lymphoma and diffuse large B-cell
lymphoma


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Additional Information - Clinical Development Programs

REGEN-COV (casirivimab and imdevimab)



In April 2022, the Company announced that the FDA extended by three months (with
a new target action date of July 13, 2022) its review of the BLA for REGEN-COV
to treat COVID-19 in non-hospitalized patients and as prophylaxis in certain
individuals. The extension is due to ongoing discussions with the FDA relating
to pre-exposure prophylactic use, for which the Company has submitted additional
data from its completed prophylaxis trial that the FDA has accepted for review.

Agreements Related to COVID-19

U.S. Government



In the first quarter of 2020, the Company announced an expansion of its Other
Transaction Agreement with the Biomedical Advanced Research Development
Authority ("BARDA"), pursuant to which the U.S. Department of Health and Human
Services ("HHS") was obligated to fund certain of our costs incurred for
research and development activities related to COVID-19 treatments.

In July 2020, the Company entered into an agreement with entities acting at the
direction of BARDA and the U.S. Department of Defense to manufacture and deliver
filled and finished drug product of REGEN-COV to the U.S. government. The
agreement, as subsequently amended, provided for payments to the Company of up
to $465.9 million in the aggregate for bulk manufacturing of the drug substance,
as well as fill/finish, storage, and other activities.

In January 2021, the Company announced an agreement with an entity acting on
behalf of the U.S. Department of Defense and HHS to manufacture and deliver
additional filled and finished drug product of REGEN-COV to the U.S. government.
Pursuant to the agreement, the U.S. government was obligated to purchase 1.25
million doses of drug product, resulting in payments to the Company of $2.625
billion.

In September 2021, the Company announced an amendment to its January 2021
agreement to supply the U.S. government with an additional 1.4 million doses of
REGEN-COV. Pursuant to the agreement, the U.S. government was obligated to
purchase all filled and finished doses of such additional drug product delivered
by January 31, 2022, resulting in payments to the Company of $2.940 billion in
the aggregate. Additionally, Roche supplied a portion of the doses to Regeneron
to fulfill our agreement with the U.S. government (see "Roche" section below for
further details regarding our collaboration agreement with Roche).

As of December 31, 2021, the Company had completed its final deliveries of drug product under the agreements described above. See "Results of Operations - Revenues" below for REGEN-COV net product sales recognized during 2021.

Roche

In 2020, we entered into a collaboration agreement with Roche to develop, manufacture, and distribute the casirivimab and imdevimab antibody cocktail (known as REGEN-COV in the United States and Ronapreve in other countries). We lead global development activities for casirivimab and imdevimab, and the parties jointly fund certain studies.



Under the terms of the agreement, each party is obligated to dedicate a certain
amount of manufacturing capacity to casirivimab and imdevimab each year. We
distribute the product in the United States and Roche distributes the product
outside of the United States. The parties share gross profits from worldwide
sales based on a pre-specified formula, depending on the amount of manufactured
product supplied by each party to the market.

Collaboration, License, and Other Agreements

Sanofi

Antibody



We are collaborating with Sanofi on the global development and commercialization
of Dupixent, Kevzara, and itepekimab (the "Antibody Collaboration"). Under the
terms of the Antibody License and Collaboration Agreement, Sanofi is generally
responsible for funding 80%-100% of agreed-upon development costs. We are
obligated to reimburse Sanofi for 30%-50% of worldwide development expenses that
were funded by Sanofi based on our share of collaboration profits from
commercialization of collaboration products. However, we are only required to
apply 10% of our share of the profits from the Antibody Collaboration in any
calendar quarter to reimburse Sanofi for these development costs.

Under our collaboration agreement, Sanofi records product sales for commercialized products, and Regeneron has the right to co-commercialize such products on a country-by-country basis. We co-commercialize Dupixent in the United States and in certain countries outside the United States. We supply certain commercial bulk product to Sanofi. We and Sanofi equally share


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profits and losses from sales within the United States. We and Sanofi share
profits outside the United States on a sliding scale based on sales starting at
65% (Sanofi)/35% (us) and ending at 55% (Sanofi)/45% (us), and share losses
outside the United States at 55% (Sanofi)/45% (us). In addition to profit and
loss sharing, we are entitled to receive sales milestone payments from Sanofi.
In each of the years ended 2020 and 2021, the Company earned a $50.0 million
sales-based milestone from Sanofi, upon aggregate annual sales of antibodies
outside the United States (including Praluent) exceeding $1.0 billion and $1.5
billion, respectively, on a rolling twelve-month basis, and, in first quarter of
2022, the Company earned the next $50.0 million sales-based milestone upon
aggregate sales of antibodies outside the United States exceeding $2.0 billion.
We are entitled to receive up to an aggregate of $100.0 million in additional
sales milestone payments from Sanofi, which includes the next sales milestone
payment of $50.0 million that would be earned when such sales outside the United
States exceed $2.5 billion on a rolling twelve-month basis.

Immuno-Oncology



We are collaborating with Sanofi on the development and commercialization of
antibody-based cancer treatments in the field of immuno-oncology (the "IO
Collaboration"). We are obligated to reimburse Sanofi for half of the
development costs they funded that are attributable to clinical development of
antibody product candidates under the Amended and Restated Immuno-oncology
Discovery and Development Agreement from our share of profits from
commercialized IO Collaboration products.

Under the terms of the IO License and Collaboration Agreement, the parties are
co-developing and co-commercializing Libtayo. We have principal control over the
development of Libtayo, and the parties share equally, on an ongoing basis,
development and commercialization expenses for Libtayo.

With regard to Libtayo, we lead commercialization activities in the United
States, while Sanofi leads commercialization activities outside of the United
States and the parties equally share profits from worldwide sales. Sanofi has
exercised its option to co-commercialize Libtayo in the United States. We will
be entitled to a milestone payment of $375.0 million in the event that global
sales of Libtayo equal or exceed $2.0 billion in any consecutive twelve-month
period.

Bayer

We and Bayer are parties to a license and collaboration agreement for the global
development and commercialization of EYLEA and aflibercept 8 mg outside the
United States. All agreed-upon development expenses incurred by the Company and
Bayer are shared equally. Bayer markets EYLEA outside the United States, and the
companies share equally in profits and losses from such sales. In Japan, we were
entitled to receive a tiered percentage of between 33.5% and 40.0% of EYLEA net
sales through 2021, and, effective January 1, 2022, the companies share equally
in profits and losses from sales.

We are obligated to reimburse Bayer for 50% of the development costs that it has
incurred under the agreement from our share of the collaboration profits. The
reimbursement payment in any quarter will equal 5% of the then outstanding
repayment obligation, but never more than our share of the collaboration profits
in the quarter unless we elect to reimburse Bayer at a faster rate.

Within the United States, we retain exclusive commercialization rights and are entitled to all profits from such sales.

Teva



We and Teva are parties to a collaboration agreement to develop and
commercialize fasinumab globally, excluding certain Asian countries that are
subject to our collaboration agreement with Mitsubishi Tanabe Pharma Corporation
("MTPC"). In connection with the agreement, Teva made a $250.0 million
non-refundable up-front payment. We lead global development activities, and the
parties share equally, on an ongoing basis, development costs under a global
development plan. As of March 31, 2022, we had received an aggregate $120.0
million of development milestones from Teva, and we are entitled to receive up
to an aggregate of $340.0 million in additional development milestones and up to
an aggregate of $1.890 billion in contingent payments upon achievement of
specified annual net sales amounts. We are responsible for the manufacture and
supply of fasinumab globally.

Within the United States, we will lead commercialization activities, and the
parties will share equally in any profits or losses in connection with
commercialization of fasinumab. In the territory outside of the United States,
Teva will lead commercialization activities and we will supply product to Teva
at a tiered purchase price, which is calculated as a percentage of net sales of
the product (subject to adjustment in certain circumstances).

Alnylam



In 2018, we and Alnylam Pharmaceuticals, Inc. entered into a collaboration to
discover RNA interference ("RNAi") therapeutics for NASH and potentially other
related diseases, as well as to research, co-develop and commercialize any
therapeutic product candidates that emerge from these discovery efforts
(including ALN-HSD, which is currently in clinical
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development). ALN-HSD is being co-developed with Alnylam with terms generally
consistent with the form of a Co-Commercialization Collaboration Agreement in
connection with the 2019 collaboration agreement as described below. Alnylam is
conducting the Phase 1 clinical trial for ALN-HSD and Regeneron will be the lead
party for all future development.

In 2019, we and Alnylam entered into a global, strategic collaboration to
discover, develop, and commercialize RNAi therapeutics for a broad range of
diseases by addressing therapeutic disease targets expressed in the eye and
central nervous system ("CNS"), in addition to a select number of targets
expressed in the liver. Under the terms of the agreement, we made an up-front
payment of $400.0 million to Alnylam. For each program, we will provide Alnylam
with a specified amount of funding at program initiation and at lead candidate
designation, and Alnylam is eligible to receive up to an aggregate of $200.0
million in clinical proof-of-principle milestones for eye and CNS programs.
Following designation of a lead candidate, the parties may further advance such
lead candidate under either a co-commercialization collaboration agreement
structure (under which the parties are advancing ALN-APP, which is currently in
clinical development) or a license agreement.

In addition, during 2019, the parties entered into a Co-Commercialization
Collaboration Agreement for a silencing RNA ("siRNA") therapeutic targeting the
C5 component of the human complement pathway being developed by Alnylam, with
Alnylam as the lead party, and a License Agreement for a combination product
consisting of cemdisiran and pozelimab, with us as the licensee. Under the C5
siRNA Co-Commercialization Collaboration agreement, the parties share costs
equally and will split profits (if commercialized); and under the License
Agreement, the licensee is responsible for its own costs and expenses. The C5
siRNA License Agreement contains a flat low double-digit royalty payable to
Alnylam on our potential future net sales of the combination product only
subject to customary reductions, as well as up to $325.0 million in sales
milestones.

Intellia



In 2016, we entered into a license and collaboration agreement with Intellia
Therapeutics, Inc. to advance CRISPR/Cas9 gene-editing technology for in vivo
therapeutic development. NTLA-2001, which is in clinical development, is subject
to a co-development and co-commercialization arrangement pursuant to which
Intellia will lead development and commercialization activities and the parties
share an agreed-upon percentage of development expenses and profits (if
commercialized).

In 2020, we expanded our existing collaboration with Intellia to provide us with
rights to develop products for additional in vivo CRISPR/Cas9-based therapeutic
targets and for the companies to jointly develop potential products for the
treatment of hemophilia A and B, with Regeneron leading development and
commercialization activities. In addition, we also received non-exclusive rights
to independently develop and commercialize ex vivo gene edited products. In
connection with the 2020 agreement, we made a $70.0 million up-front payment and
purchased shares of Intellia common stock for an aggregate purchase price of
$30.0 million.

BARDA

We and BARDA are parties to agreements pursuant to which HHS provided certain
funding to develop, test, and manufacture a treatment for Ebola virus infection.
In July 2020, HHS exercised its option under an existing agreement to provide up
to $344.6 million of additional funding for the manufacture and supply of
Inmazeb. We expect to deliver a pre-specified number of Inmazeb treatment doses
over the course of approximately six years.

See "Agreements Related to COVID-19 - U.S. Government" section above for information related to our COVID-19 agreements.

Kiniksa



Pursuant to a 2017 license agreement, we granted Kiniksa Pharmaceuticals, Ltd.
the right to develop and commercialize certain new indications for ARCALYST.
During the first quarter of 2021, Kiniksa received marketing approval in the
United States for a new indication of ARCALYST, recurrent pericarditis. The
quarterly period ended March 31, 2021 was the last quarter for which the Company
recorded net product sales of ARCALYST.

Following this approval, Kiniksa is solely responsible for the U.S. development
and commercialization of ARCALYST in all approved indications, and Regeneron
will continue to supply clinical and commercial product to Kiniksa. Kiniksa will
pay Regeneron 50% of its profits from sales of ARCALYST and the parties will not
share in any losses incurred by Kiniksa in connection with commercialization of
ARCALYST.

Ultragenyx

In January 2022 we entered into a license and collaboration agreement for
Ultragenyx Pharmaceutical Inc. to develop and commercialize Evkeeza in countries
outside of the United States. In connection with the agreement, Ultragenyx made
a $30.0 million non-refundable up-front payment to the Company. Ultragenyx will
share in certain costs for global trials led by the

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Company and also have the right to continue to clinically develop Evkeeza in
countries outside of the U.S. We will supply commercial product to Ultragenyx at
a tiered purchase price, which is calculated as a percentage of net sales of the
product (subject to adjustment in certain circumstances), and are eligible to
receive additional regulatory and sales milestone payments.

We have also granted Ultragenyx an exclusive option to negotiate a separate agreement to collaborate on the development and commercialization of garetosmab outside of the United States under terms to be agreed upon by both companies.

Checkmate



In April 2022, we entered into an Agreement and Plan of Merger (the "Merger
Agreement") to acquire Checkmate Pharmaceuticals, Inc. at a total equity value
of approximately $250 million. On May 2, 2022, we commenced a tender offer to
acquire any and all outstanding shares of common stock of Checkmate at a price
of $10.50 per share, to be paid to each shareholder tendering Checkmate shares
in cash, without interest, subject to reduction for any applicable withholding
taxes. The consummation of the tender offer is subject to certain conditions,
including the tender of at least a majority of the outstanding shares of
Checkmate common stock, the expiration of the waiting period under the
Hart-Scott-Rodino Antitrust Improvements Act and other customary closing
conditions. If the tender offer is successfully consummated, we will acquire all
shares not acquired in the tender offer through a merger that does not require
the vote of Checkmate shareholders. The transaction is expected to close in
mid-2022.

General



Our ability to generate profits and to generate positive cash flow from
operations over the next several years depends significantly on the continued
success in commercializing EYLEA and Dupixent. We expect to continue to incur
substantial expenses related to our research and development activities, a
portion of which we expect to be reimbursed by our collaborators. Also, our
research and development activities outside our collaborations, the costs of
which are not reimbursed, are expected to expand and require additional
resources. We also expect to incur substantial costs related to the
commercialization of our marketed products. Our financial results may fluctuate
from quarter to quarter and will depend on, among other factors, the net sales
of our products; the scope and progress of our research and development efforts;
the timing of certain expenses; the continuation of our collaborations, in
particular with Sanofi and Bayer, including our share of collaboration profits
or losses from sales of commercialized products and the amount of reimbursement
of our research and development expenses that we receive from collaborators; and
the amount of income tax expense we incur, which is partly dependent on the
profits or losses we earn in each of the countries in which we operate. We
cannot predict whether or when new products or new indications for marketed
products will receive regulatory approval or, if any such approval is received,
whether we will be able to successfully commercialize such product(s) and
whether or when they may become profitable.

Corporate Information



We were incorporated in the State of New York in 1988 and publicly listed in
1991. Our principal executive offices are located at 777 Old Saw Mill River
Road, Tarrytown, New York 10591, and our telephone number at that address is
(914) 847-7000.

We make available free of charge on or through our Internet website
(http://www.regeneron.com) our Annual Report on Form 10-K, Quarterly Reports on
Form 10-Q, Current Reports on Form 8-K, and, if applicable, amendments to those
reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange
Act, as soon as reasonably practicable after we electronically file such
material with, or furnish it to, the Securities and Exchange Commission ("SEC").

Investors and other interested parties should note that we use our media and
investor relations website (http://newsroom.regeneron.com) and our social media
channels to publish important information about Regeneron, including information
that may be deemed material to investors. We encourage investors and other
interested parties to review the information we may publish through our media
and investor relations website and the social media channels listed on our media
and investor relations website, in addition to our SEC filings, press releases,
conference calls, and webcasts.

The information contained on our websites and social media channels is not included as a part of, or incorporated by reference into, this report.


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Results of Operations

Three Months Ended March 31, 2022 and 2021



Net Income

                                                           Three Months Ended
                                                               March 31,
             (In millions, except per share data)         2022           2021
             Revenues                                  $ 2,965.1      $ 2,528.7
             Operating expenses                          1,706.6        1,416.0
             Income from operations                      1,258.5        1,112.7
             Other income (expense)                       (197.4)         140.3
             Income before income taxes                  1,061.1        1,253.0
             Income tax expense                             87.6          137.8
             Net income                                $   973.5      $ 1,115.2

             Net income per share - diluted            $    8.61      $   10.09


Revenues

                                                             Three Months Ended
                                                                  March 31,
(In millions)                                             2022                 2021               $ Change
Net product sales in the United States:
EYLEA                                                $   1,517.6          $   1,347.0          $      170.6
Libtayo                                                     78.9                 69.1                   9.8
Praluent                                                    33.6                 43.3                  (9.7)
REGEN-COV                                                      -                262.2                (262.2)
Evkeeza                                                      8.5                  0.5                   8.0
ARCALYST                                                       -  *               2.2                        *
Collaboration revenue:
Sanofi                                                     630.9                364.8                 266.1
Bayer                                                      385.3                322.8                  62.5
Roche                                                      216.3                 66.8                 149.5
Other revenue                                               94.0                 50.0                  44.0
Total revenues                                       $   2,965.1          $   2,528.7          $      436.4

* Effective April 1, 2021, Kiniksa records net product sales of ARCALYST in the United States. Previously, the Company recorded net product sales of ARCALYST in the United States.

Net Product Sales



Net product sales of EYLEA in the United States increased for the three months
ended March 31, 2022, compared to the same period in 2021, due to higher sales
volume.

During the three months ended March 31, 2021, we recorded net product sales of
REGEN-COV in connection with our agreements with the U.S. government. As of
December 31, 2021, the Company had completed its final deliveries of drug
product under its agreements with the U.S. government; as a result, there were
no net product sales of REGEN-COV in the United States recorded during the three
months ended March 31, 2022. Refer to "Agreements Related to COVID-19 - U.S.
Government" section above for further details.

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Collaboration Revenue

Sanofi Collaboration Revenue

                                                                               Three Months Ended
                                                                                    March 31,
(In millions)                                                               2022                   2021
Antibody:
Regeneron's share of profits in connection with
commercialization of antibodies                                      $      415.3             $     260.6
Sales-based milestone earned                                                 50.0                       -
Reimbursement for manufacturing of commercial supplies(a)                   160.8                   105.6
Total Antibody                                                              626.1                   366.2

Immuno-oncology:

Regeneron's share of profits (losses) in connection with commercialization of Libtayo outside the United States

                        2.8                    (6.1)

Reimbursement for manufacturing of ex-U.S. commercial supplies(a)

                                                                   2.0                     4.7
Total Immuno-oncology                                                         4.8                    (1.4)
Total Sanofi collaboration revenue                                   $      630.9             $     364.8

(a) Corresponding costs incurred by us in connection with such production is recorded within Cost of collaboration and contract manufacturing

Antibody



Global net product sales of Dupixent and Kevzara are recorded by Sanofi. Sanofi
provides us with an estimate of our share of the profits or losses from
commercialization of antibodies for the most recent fiscal quarter; these
estimates are reconciled to actual results in the subsequent fiscal quarter, and
our portion of the profits or losses is adjusted accordingly, as necessary. The
increase in our share of profits in connection with commercialization of
antibodies during the three months ended March 31, 2022, compared to the same
period of 2021, was driven by higher Dupixent profits.

Regeneron's share of profits in connection with the commercialization of Dupixent and Kevzara is summarized below:



                                                                                  Three Months Ended
                                                                                       March 31,
(In millions)                                                                2022                  2021
Dupixent and Kevzara net product sales                                   $     1,916.8       $         1,332.0
Regeneron's share of collaboration profits                               $       462.2       $           289.9

Reimbursement of development expenses incurred by Sanofi in accordance with Regeneron's payment obligation

                                  (46.9)                  (29.3)

Regeneron's share of profits in connection with commercialization of antibodies

$       415.3       $           260.6

Regeneron's share of collaboration profits as a percentage of Dupixent and Kevzara net product sales


       22%                     20%


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During the three months ended March 31, 2022, the Company earned a $50.0 million
sales-based milestone from Sanofi, upon aggregate annual sales of antibodies
outside the United States (including Praluent) exceeding $2.0 billion on a
rolling twelve-month basis.

Bayer Collaboration Revenue

                                                                                Three Months Ended
                                                                                     March 31,
(In millions)                                                                2022                  2021
Regeneron's share of profits in connection with
commercialization of EYLEA outside the United States                   $     338.4             $    308.9

Reimbursement for manufacturing of ex-U.S. commercial supplies(a)

                                                                   25.0                   13.9
One-time payment in connection with change in Japan arrangement               21.9                      -
Total Bayer collaboration revenue                                      $     385.3             $    322.8

(a) Corresponding costs incurred by us in connection with such production is recorded within Cost of collaboration and contract manufacturing




Bayer records net product sales of EYLEA outside the United States. Bayer
provides us with an estimate of our share of the profits from commercialization
of EYLEA outside the United States for the most recent fiscal quarter; these
estimates are reconciled to actual results in the subsequent fiscal quarter, and
our portion of the profit is adjusted accordingly, as necessary.

Regeneron's share of profits in connection with commercialization of EYLEA outside the United States is summarized below:



                                                                                 Three Months Ended
                                                                                     March 31,
(In millions)                                                               2022                  2021
EYLEA net product sales outside the United States                      $    

868.5 $ 811.2* Regeneron's share of collaboration profit from sales outside the United States

$        353.4       $           323.7

Reimbursement of development expenses incurred by Bayer in accordance with Regeneron's payment obligation

                                 (15.0)                  (14.8)
Regeneron's share of profits in connection with
commercialization of EYLEA outside the United States                   $        338.4       $           308.9

Regeneron's share of profits as a percentage of EYLEA net product sales outside the United States

                                           39%                     38%

* Effective January 1, 2022, the Company and Bayer commenced sharing equally in profits and losses based on
sales from Bayer to its distributor in Japan. Previously, the Company received from Bayer a tiered percentage
of sales based on sales by Bayer's distributor in Japan. Consequently, the prior year net product sales
amount has been revised for comparability purposes.


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Roche Collaboration Revenue



As described above under "Agreements Related to COVID-19 - Roche", Roche
distributes and records net product sales of Ronapreve outside the United
States, and the parties share gross profits from worldwide sales, depending on
the amount of manufactured product supplied by each party to the market. Each
quarter, a single payment is due from one party to the other to true-up the
global gross profits between the parties. If Regeneron is to receive a true-up
payment from Roche, such amount will be recorded to Collaboration revenue. If
Regeneron is to make a true-up payment to Roche, such amount will be recorded to
Cost of goods sold.

During the three months ended March 31, 2022 and 2021, the Company recorded,
within collaboration revenue, $216.3 million and $66.8 million of payments,
respectively, from Roche in connection with this agreement. Roche provides us
with an estimate of its gross profits for the most recent fiscal quarter; these
estimates are reconciled to actual results in the subsequent fiscal quarter, and
the true-up of global gross profits is adjusted accordingly, as necessary.

Other Revenue

Other revenue during the three months ended March 31, 2022 included a $30.0 million up-front payment received from Ultragenyx in connection with our license and collaboration agreement for Evkeeza outside the United States.



Expenses

                                                                     Three Months Ended
                                                                          March 31,
(In millions, except headcount data)                               2022               2021             Change
Research and development(a)                                    $   843.8          $   742.9          $  100.9
Acquired in-process research and development                        28.1                  -              28.1
Selling, general, and administrative(a)                            450.0              405.6              44.4
Cost of goods sold(b)                                              207.3              183.2              24.1
Cost of collaboration and contract manufacturing(c)                197.6              124.8              72.8
Other operating (income) expense, net                              (20.2)             (40.5)             20.3
Total operating expenses                                       $ 1,706.6          $ 1,416.0          $  290.6

Average headcount                                                 10,492              9,447             1,045

(a) Includes costs incurred as well as cost reimbursements from collaborators who are not deemed to be our
customers
(b) Cost of goods sold primarily includes costs in connection with producing commercial supplies for products
that are sold by Regeneron in the United States (i.e., for which we record net product sales), any royalties we
are obligated to pay on such sales, and amounts we are obligated to pay to collaborators for their share of
gross profits.
(c) Cost of collaboration and contract manufacturing includes costs we incur in connection with producing
commercial drug supplies for collaborators and others.


Operating expenses for the three months ended March 31, 2022 and 2021 included a total of $166.9 million and $130.9 million, respectively, of stock-based compensation expense related to equity awards granted under our long-term incentive plans.

Research and Development Expenses



The following table summarizes our estimates of direct research and development
expenses by clinical development program and other significant categories of
research and development expenses. Direct research and development expenses are
comprised primarily of costs paid to third parties for clinical and product
development activities, including costs related to preclinical research
activities, clinical trials, and the portion of research and development
expenses incurred by our collaborators that we are obligated to reimburse.
Indirect research and development expenses have not been allocated directly to
each program, and primarily consist of costs to compensate personnel, overhead
and infrastructure costs to maintain our facilities, and other costs related to
activities that benefit multiple projects. Clinical manufacturing costs
primarily consist of costs to manufacture bulk drug product for clinical
development purposes as well as related external drug filling, packaging, and
labeling costs. Clinical manufacturing costs also includes pre-launch commercial
supplies which did not meet the criteria to be capitalized as inventory. The
table below also includes reimbursements of research and development expenses by
collaborators, as when we are entitled to reimbursement of all or a portion of
such expenses that we incur under a collaboration, we record those reimbursable
amounts in the period in which such costs are incurred.

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                                                                 Three Months Ended
                                                                      March 31,
(In millions)                                                 2022                  2021*              $ Change
Direct research and development expenses:
Libtayo (cemiplimab)                                    $      38.6             $     39.8          $      (1.2)
Dupixent (dupilumab)                                           32.1                   27.4                  4.7
EYLEA                                                          24.4                   28.1                 (3.7)
REGEN-COV                                                       2.7                  208.8               (206.1)
Other product candidates in clinical development
and other research programs                                    97.9                  116.0                (18.1)
Total direct research and development expenses                195.7                  420.1               (224.4)

Indirect research and development expenses:
Payroll and benefits                                          283.8                  233.0                 50.8
Lab supplies and other research and development
costs                                                          38.0                   33.4                  4.6
Occupancy and other operating costs                           120.3                   95.1                 25.2
Total indirect research and development expenses              442.1                  361.5                 80.6

Clinical manufacturing costs                                  271.7                  133.7                138.0

Reimbursement of research and development
expenses by collaborators                                     (65.7)                (172.4)               106.7

Total research and development expenses                 $     843.8

$ 742.9 $ 100.9

* Certain prior year amounts have been reclassified to conform to the current year's presentation




Reimbursement of research and development expenses by collaborators included
reimbursements from Roche related to REGEN-COV of $86.8 million for the three
months ended March 31, 2021. For the three months ended March 31, 2022,
reimbursements from Roche related to REGEN-COV were not material.

Research and development expenses included stock-based compensation expense of
$92.4 million and $69.7 million for the three months ended March 31, 2022 and
2021, respectively.

There are numerous uncertainties associated with drug development, including
uncertainties related to safety and efficacy data from each phase of drug
development, uncertainties related to the enrollment and performance of clinical
trials, changes in regulatory requirements, changes in the competitive landscape
affecting a product candidate, and other risks and uncertainties described in
Part II, Item 1A. "Risk Factors". There is also variability in the duration and
costs necessary to develop a pharmaceutical product, potential opportunities
and/or uncertainties related to future indications to be studied, and the
estimated cost and scope of the projects. The lengthy process of seeking FDA and
other applicable approvals, and subsequent compliance with applicable statutes
and regulations, require the expenditure of substantial resources. Any failure
by us to obtain, or delay in obtaining, regulatory approvals could materially
adversely affect our business. We are unable to reasonably estimate if our
product candidates in clinical development will generate material product
revenues and net cash inflows.

Acquired In-process Research and Development ("IPR&D")

Acquired IPR&D for the three months ended March 31, 2022 included a $20.0 million opt-in payment in connection with a product candidate under our collaboration agreement with Adicet Bio, Inc.

Selling, General, and Administrative Expenses



Selling, general, and administrative expenses increased for the three months
ended March 31, 2022, compared to the same period in 2021, primarily due to
higher headcount and headcount-related costs and an increase in
commercialization-related expenses for EYLEA. Selling, general, and
administrative expenses also included stock-based compensation expense of $60.7
million and $50.8 million for the three months ended March 31, 2022 and 2021,
respectively.

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Cost of Goods Sold



Cost of goods sold increased for the three months ended March 31, 2022, compared
to the same period in 2021, primarily due to $58.0 million of costs related to
REGEN-COV, including inventory write-offs and reserves, partly offset by lower
REGEN-COV manufacturing costs since there were no net product sales in the
United States for the three months ended March 31, 2022.

Cost of Collaboration and Contract Manufacturing



Cost of collaboration and contract manufacturing increased for the three months
ended March 31, 2022, compared to the same period in 2021, primarily due to the
recognition of manufacturing costs associated with higher sales of Dupixent and
an increase in shipments of commercial supplies of Praluent for Sanofi outside
the United States.

Other Operating (Income) Expense

Other operating expense (income), net, includes recognition of a portion of amounts previously deferred in connection with up-front and development milestone payments, as applicable, received in connection with our Sanofi immuno-oncology, Teva, and MTPC collaborative arrangements.

Other Income (Expense)



Other income (expense) was ($197.4) million and $140.3 million for the three
months ended March 31, 2022 and 2021, respectively. This change was primarily
driven by the recognition of net unrealized losses on equity securities of
$211.2 million for the three months ended March 31, 2022 compared to $143.9
million of net unrealized gains for the same period in 2021.

Income Taxes

                                                             Three Months Ended
                                                                  March 31,
     (In millions, except effective tax rate)                 2022               2021
     Income tax expense                              $                 87.6    $   137.8
     Effective tax rate                                              8.3  %      11.0  %


Our effective tax rate for the three months ended March 31, 2022 was positively
impacted, compared to the U.S. federal statutory rate, primarily by income
earned in foreign jurisdictions with tax rates lower than the U.S. federal
statutory rate and stock-based compensation. Our effective tax rate for the
three months ended March 31, 2021 was positively impacted, compared to the U.S.
federal statutory rate, primarily by the reversal of liabilities related to
uncertain tax positions, stock-based compensation, income earned in foreign
jurisdictions with tax rates lower than the U.S. federal statutory rate, and
federal tax credits for research activities.

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Liquidity and Capital Resources

Our financial condition is summarized as follows:



                                               March 31,              December 31,
(In millions)                                     2022                    2021                  $ Change
Financial assets:
Cash and cash equivalents                  $       3,345.7          $      2,885.6          $       460.1
Marketable securities - current                    3,704.9                 2,809.1                  895.8
Marketable securities - noncurrent                 7,084.0                 6,838.0                  246.0
                                           $      14,134.6          $     

12,532.7 $ 1,601.9



Borrowings and finance lease liabilities:
Long-term debt                             $       1,980.4          $      1,980.0          $         0.4
Finance lease liabilities                  $         720.0          $        719.7  *       $         0.3

Working capital:
Current assets                             $      14,306.0          $     14,014.9          $       291.1
Current liabilities                                3,007.6                 3,932.5  *              (924.9)
                                           $      11,298.4          $     10,082.4          $     1,216.0

* Includes $719.7 million related to finance lease liabilities, which were classified within Current liabilities as of December 31, 2021. See "Tarrytown, New York Leases" section below for details.

As of March 31, 2022, we also had borrowing availability of $750.0 million under a revolving credit facility.

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