| 10.27 | | | Amended and Restated Guaranty, dated as of May 2, 2019, made by Regeneron Pharmaceuticals, Inc., Regeneron Healthcare Solutions, Inc., and Regeneron Genetics Center LLC, as guarantors. (Incorporated by reference from the Form 8-K for the Registrant, filed May 3, 2019.) | | |
| 10.28 | | | Letter Agreement, dated as of January 7, 2018, by and among the Registrant, Sanofi, sanofi-aventis US LLC, Aventis Pharmaceuticals Inc., sanofi-aventis Amérique du Nord, and Sanofi Biotechnology SAS. (Incorporated by reference from the Form 10-Q for the Registrant, for the quarter ended March 31, 2018, filed May 3, 2018.) | | |
| 10.29** | | | Master Agreement, dated as of April 8, 2019, by and between the Registrant and Alnylam Pharmaceuticals, Inc. (Incorporated by reference from the Form 10-Q for the Registrant, for the quarter ended June 30, 2019, filed August 6, 2019). | | |
| 10.29.1** | | | Form of Co-Co Collaboration Agreement (Exhibit B to Master Agreement contained in Exhibit 10.29). | | |
| 10.29.2** | | | Form of License Agreement (Exhibit C to Master Agreement contained in Exhibit 10.29). | | |
| 10.30** | | | Investor Agreement, dated as of April 8, 2019, by and between the Registrant and Alnylam Pharmaceuticals, Inc. (Incorporated by reference from the Form 10-Q for the Registrant, for the quarter ended June 30, 2019, filed August 6, 2019.) | | |
| 10.31 | | | Stock Purchase Agreement, dated as of April 8, 2019, by and between the Registrant and Alnylam Pharmaceuticals, Inc. (Incorporated by reference from the Form 10-Q for the Registrant, for the quarter ended June 30, 2019, filed August 6, 2019.) | | |
| 10.32 | | | Stock Repurchase Agreement, dated as of May 25, 2020, by and between the Registrant and Sanofi. (Incorporated by reference from the Form 8-K for the Registrant, filed May 29, 2020.) | | |
| 10.33** | | | Base Agreement, dated as of July 6, 2020, by and between the Registrant and Advanced Technology International. (Incorporated by reference from the Form 10-Q for the Registrant, for the quarter ended September 30, 2020, filed November 5, 2020.) | | |
| 10.34** | | | Project Agreement, dated as of July 6, 2020, by and between the Registrant and Advanced Technology International. | | |
| 10.34.1 | | | Modification No. 01 to Project Agreement, dated as of October 13, 2020, by and between the Registrant and Advanced Technology International. | | |
| 10.34.2** | | | Modification No. 02 to Project Agreement, dated as of November 17, 2020, by and between the Registrant and Advanced Technology International. | | |
| 10.35** | | | License Agreement, dated as of August 18, 2020, by and among the Registrant, F. Hoffman-La Roche Ltd, and Genentech, Inc. (Incorporated by reference from the Form 10-Q for the Registrant, for the quarter ended September 30, 2020, filed November 5, 2020.) | | |
| 21.1 | | | Subsidiaries of the Registrant. | | |
| 23.1 | | | Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm. | | |
| 24.1 | | | Power of Attorney (included on the signature page of this Annual Report on Form 10-K). | | |
| 31.1 | | | Certification of Principal Executive Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. | | |
| 31.2 | | | Certification of Principal Financial Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. | | |
| 32 | | | Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. Section 1350. | | |
| 101 | | | Interactive Data Files pursuant to Rule 405 of Regulation S-T formatted in Inline Extensible Business Reporting Language ("Inline XBRL"): (i) the Registrant's Consolidated Balance Sheets as of December 31, 2020 and 2019; (ii) the Registrant's Consolidated Statements of Operations and Comprehensive Income for the years ended December 31, 2020, 2019, and 2018; (iii) the Registrant's Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2020, 2019, and 2018; (iv) the Registrant's Consolidated Statements of Cash Flows for the years ended December 31, 2020, 2019, and 2018; and (v) the notes to the Registrant's Consolidated Financial Statements. | | |
| 104 | | | Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101). | | |
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