Regeneron Pharmaceuticals Collaboration Agreements

First Amendment to Amended and Restated License and Collaboration Agreement by and between the Registrant and Aventis Pharmaceuticals Inc., dated May 1, 2013 (Filed With SEC on August 3, 2023)

Fifth Amendment to Amended and Restated License and Collaboration Agreement, dated as of June 1, 2022, by and between the Registrant, Sanofi Biotechnology SAS, and Sanofi (Filed With SEC on August 3, 2022)

Amended and Restated Immuno-Oncology License and Collaboration Agreement, dated as of June 1, 2022, by and between the Registrant and Sanofi Biotechnology SAS (Filed With SEC on August 3, 2022)

First Amendment to Immuno-oncology License and Collaboration Agreement, dated as of October 6, 2021, by and between the Registrant and Sanofi Biotechnology SAS (Filed With SEC on February 7, 2022)

Fourth Amendment to Amended and Restated License and Collaboration Agreement, dated as of October 6, 2021, by and between the Registrant, Sanofi Biotechnology SAS, and Sanofi (Filed With SEC on February 7, 2022)

Third Amendment to Amended and Restated License and Collaboration Agreement, dated as of April 5, 2020, and effective as of April 1, 2020, by and between the Registrant, Sanofi... (Filed With SEC on August 5, 2020)

Form of Co-Co Collaboration Agreement (Exhibit B to Master Agreement contained in Exhibit 10.4) (Filed With SEC on August 6, 2019)

AMENDMENT NO. 2 TO AMENDED AND RESTATED LICENSE AND COLLABORATION AGREEMENT (Filed With SEC on November 4, 2015)

AMENDED AND RESTATED COLLABORATION AGREEMENT By and Between SANOFI-AVENTIS US, LLC and REGENERON PHARMACEUTICALS, INC. Dated as of February 23, 2015 TABLE OF CONTENTS (Filed With SEC on May 7, 2015)

FIRST AMENDMENT TO AMENDED AND RESTATED LICENSE AND COLLABORATION AGREEMENT (Filed With SEC on August 6, 2013)

LICENSE AND COLLABORATION AGREEMENT (Filed With SEC on February 27, 2008)

EX-10.1: LICENSE AND COLLABORATION AGREEMENT (Filed With SEC on November 6, 2006)

EX-10.13.4: AMENDMENT NO. 4 TO COLLABORATION AGREEMENT (Filed With SEC on February 28, 2006)

EX-10.13.3: AMENDMENT NO. 3 TO COLLABORATION AGREEMENT (Filed With SEC on February 28, 2006)

AMENDMENT NO. 1 TO COLLABORATION AGREEMENT (Filed With SEC on March 11, 2005)

SECOND AMENDMENT TO COLLABORATION AGREEMENT (Filed With SEC on January 11, 2005)

COLLABORATION AGREEMENT (Filed With SEC on November 12, 2003)

COLLABORATION, LICENSE AND OPTION AGREEMENT (Filed With SEC on May 15, 2003)

EX-10.22: FOCUSED COLLABORATION AGREEMENT (Filed With SEC on August 13, 2002)