Momenta Pharmaceuticals, Inc. Human Resources Contracts & Agreements

Retention Agreement, dated as of August 19, 2020, by and between Momenta Pharmaceuticals, Inc. and Santiago Arroyo (Filed With SEC on August 19, 2020)

Retention Agreement, dated as of August 19, 2020, by and between Momenta Pharmaceuticals, Inc. and Young Kwon (Filed With SEC on August 19, 2020)

Retention Agreement, dated as of August 19, 2020, by and between Momenta Pharmaceuticals, Inc. and Anthony Manning (Filed With SEC on August 19, 2020)

Momenta Pharmaceuticals, Inc. 2013 Incentive Award Plan (Filed With SEC on August 10, 2020)

Momenta Pharmaceuticals, Inc. 2013 Incentive Award Plan, as amended and restated (Filed With SEC on August 7, 2019)

Executive Employment Agreement, dated May 15, 2017, by and between Momenta Pharmaceuticals, Inc. and Santiago Arroyo, as amended (Filed With SEC on May 3, 2019)

Executive Employment Agreement, dated July 29, 2011, by and between Momenta Pharmaceuticals, Inc. and Young Kwon, as amended (Filed With SEC on May 3, 2019)

Executive Employment Agreement, dated May 9, 2016, by and between Momenta Pharmaceuticals, Inc. and Anthony Manning, as amended (Filed With SEC on May 3, 2019)

Executive Employment Agreement, dated April 16, 2019, by and between Momenta Pharmaceuticals, Inc. and Michelle Robertson (Filed With SEC on April 19, 2019)

Separation and Release Agreement between the Registrant and Scott M. Storer, dated November 5, 2018 (Filed With SEC on February 22, 2019)

Separation and Release Agreement between the Registrant and Ganesh V. Kaundinya, dated October 5, 2018 (Filed With SEC on February 22, 2019)

Separation and Release Agreement between the Registrant and Bruce A. Leicher, dated October 5, 2018 (Filed With SEC on February 22, 2019)

Employment Agreement, as amended, effective as of May 29, 2017, by and between the Registrant and Michelle Robertson (Filed With SEC on February 22, 2019)

Employment Agreement, as amended, effective as of August 10, 2017, by and between the Registrant and Alejandra Carvajal (Filed With SEC on February 22, 2019)

Momenta Pharmaceuticals, Inc. 2013 Incentive Award Plan (as amended and restated) (Filed With SEC on August 9, 2018)

Non-Employee Director Compensation Summary (Filed With SEC on August 4, 2017)

MOMENTA PHARMACEUTICALS,INC. 2013 INCENTIVE AWARD PLAN (as amended and restated) ARTICLE 1. PURPOSE (Filed With SEC on August 4, 2017)

MOMENTA PHARMACEUTICALS, INC. EQUITY AWARD RETIREMENT POLICY (Filed With SEC on May 5, 2017)

Non-Employee Director Compensation Summary (Filed With SEC on February 24, 2017)

MOMENTA PHARMACEUTICALS, INC. 2013 INCENTIVE AWARD PLAN RESTRICTED STOCK UNIT GRANT NOTICE (Filed With SEC on February 24, 2017)

EXECUTIVE EMPLOYMENT AGREEMENT (Filed With SEC on February 24, 2017)

INDUSTRY CONSULTING AGREEMENT (Filed With SEC on February 24, 2017)

MOMENTA PHARMACEUTICALS, INC. EQUITY AWARD RETIREMENT POLICY (Filed With SEC on December 16, 2016)

MOMENTA PHARMACEUTICALS,INC. 2013 INCENTIVE AWARD PLAN (as amended and restated, as approved by stockholders on June 22, 2016) ARTICLE 1. PURPOSE (Filed With SEC on August 5, 2016)

Non-Employee Director Compensation Summary (Filed With SEC on May 6, 2016)

Non-Employee Director Compensation Summary (Filed With SEC on February 26, 2016)

Momenta Pharmaceuticals, Inc. 2013 Incentive Award Plan (amended and restated, as approved by stockholders on June 9, 2015) ARTICLE 1. PURPOSE (Filed With SEC on June 10, 2015)

MOMENTA PHARMACEUTICALS, INC. 2013 INCENTIVE AWARD PLAN (as amended and restated) ARTICLE 1. PURPOSE (Filed With SEC on June 17, 2014)

MOMENTA PHARMACEUTICALS, INC. 2013 INCENTIVE AWARD PLAN ARTICLE 1. PURPOSE (Filed With SEC on February 28, 2014)

MOMENTA PHARMACEUTICALS, INC. 2013 INCENTIVE AWARD PLAN STOCK OPTION GRANT NOTICE (Filed With SEC on June 13, 2013)

MOMENTA PHARMACEUTICALS, INC. 2013 INCENTIVE AWARD PLAN RESTRICTED STOCK GRANT NOTICE (Filed With SEC on June 13, 2013)

Non-Employee Director Compensation Summary Effective as of June 14, 2011 (Filed With SEC on August 5, 2011)

MOMENTA PHARMACEUTICALS, INC. Restricted Stock Agreement Granted Under 2004 Stock Incentive Plan, as amended (Filed With SEC on April 1, 2011)

Non-EmployeeDirector Compensation Summary (Filed With SEC on March 12, 2010)

Amendment No. 1 to the Restricted Stock Agreement Granted Under 2004 Stock Incentive Plan, as amended (Filed With SEC on March 12, 2010)

Amendment No. 1 to the Restricted Stock Agreement Granted Under 2004 Stock Incentive Plan, as amended (Filed With SEC on November 5, 2009)

AmendmentNo. 1 to the RestrictedStock Agreement Granted Under 2004 Stock Incentive Plan, as amended (Filed With SEC on November 5, 2009)

Non-EmployeeDirector Compensation Summary (Filed With SEC on May 7, 2009)

AMENDMENT NO. 1 TO EMPLOYMENT AGREEMENT (Filed With SEC on August 5, 2008)