Marsh & McLennan Contracts & Agreements

Letter Agreement Amendment, dated February 22, 2024, between Marsh & McLennan Companies, Inc. and Martin South (Filed With SEC on April 18, 2024)

Letter Agreement Amendment, dated February 22, 2024, between Marsh & McLennan Companies, Inc. and Dean M. Klisura (Filed With SEC on April 18, 2024)

Letter Agreement, effective as of January 1, 2022, between Marsh & McLennan Companies, Inc. and Dean M. Klisura (Filed With SEC on April 18, 2024)

Non-Competition and Non-Solicitation Agreement, dated as of December 1, 2021, between Marsh & McLennan Companies, Inc. and Dean M. Klisura (Filed With SEC on April 18, 2024)

Form of Deferred Stock Unit Award, with grant dates from March 1, 2024 through February 1, 2025, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan... (Filed With SEC on April 18, 2024)

Form of Restricted Stock Unit Award, dated as of February 22, 2024, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 18, 2024)

Form of Performance Stock Unit Award, dated as of February 22, 2024, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 18, 2024)

Form of Stock Option Award, dated as of February 22, 2024, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 18, 2024)

Letter Agreement Amendment, dated February 22, 2024, between Marsh & McLennan Companies, Inc. and John Q. Doyle (Filed With SEC on February 23, 2024)

Letter Agreement Amendment, dated February 22, 2024, between Marsh & McLennan Companies, Inc. and Mark C. McGivney (Filed With SEC on February 23, 2024)

Underwriting Agreement, dated February 14, 2024, by and among Marsh & McLennan Companies, Inc. and J.P. Morgan Securities LLC, Wells Fargo Securities, LLC, Goldman Sachs & Co.... (Filed With SEC on February 20, 2024)

Eighteenth Supplemental Indenture, dated February 20, 2024, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on February 20, 2024)

Underwriting Agreement, dated September 6, 2023, by and among Marsh & McLennan Companies, Inc. and BofA Securities, Inc., Citigroup Global Markets Inc, J.P. Morgan Securities and... (Filed With SEC on September 11, 2023)

Seventeenth Supplemental Indenture, dated September 11, 2023, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on September 11, 2023)

Description of Compensation Arrangements for Independent Directors of Marsh & McLennan Companies, Inc. effective June 1, 2023 (Filed With SEC on July 20, 2023)

Letter Agreement, effective as of January 1, 2022, between Marsh & McLennan Companies, Inc. and Martin South (Filed With SEC on April 20, 2023)

Non-Competition and Non-Solicitation Agreement, dated as of December 1, 2021, between Marsh & McLennan Companies, Inc. and Martin South (Filed With SEC on April 20, 2023)

Form of Deferred Stock Unit Award, with grant dates from March 1, 2023 through February 1, 2024, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan... (Filed With SEC on April 20, 2023)

Form of Restricted Stock Unit Award, dated as of February 23, 2023, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 20, 2023)

Form of Performance Stock Unit Award, dated as of February 23, 2023, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 20, 2023)

Form of Stock Option Award, dated as of February 23, 2023, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 20, 2023)

Underwriting Agreement, dated March 6, 2023, by and among Marsh & McLennan Companies, Inc. and Barclays Capital Inc., HSBC Securities (USA) Inc. and Morgan Stanley & Co. LLC, as... (Filed With SEC on March 9, 2023)

Sixteenth Supplemental Indenture, dated March 9, 2023, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on March 9, 2023)

2023 Amendment to the Marsh & McLennan C (Filed With SEC on February 13, 2023)

MARSH & MCLENNAN COMPANIES SUPPLEMENTAL SAVINGS & INVESTMENT PLAN (formerly the Marsh & McLennan Companies Stock Investment Supplemental Plan) Restatement effective January 1, 2022 (Filed With SEC on February 13, 2023)

Letter Amendment, dated November 10, 2022, between Marsh & McLennan Companies, Inc. and John Q. Doyle (Filed With SEC on November 14, 2022)

Fifteenth Supplemental Indenture, dated October 31, 2022, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on October 31, 2022)

Underwriting Agreement, dated October 24, 2022, by and among Marsh & McLennan Companies, Inc. and Deutsche Bank Securities Inc., J.P. Morgan Securities LLC, Goldman Sachs & Co.... (Filed With SEC on October 27, 2022)

Letter Agreement, effective as of September 22, 2022, between Marsh & McLennan Companies, Inc. and Mark C. McGivney (Filed With SEC on October 20, 2022)

Letter Agreement, effective as of January 1, 2022, between Marsh & McLennan Companies, Inc. and Peter C. Hearn (Filed With SEC on April 21, 2022)

Letter Agreement, effective as of April 1, 2022, between Marsh & McLennan Companies, Inc. and Martine Ferland (Filed With SEC on April 21, 2022)

Form of Deferred Stock Unit Award, with grant dates from March 1, 2022 through February 1, 2023, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan... (Filed With SEC on April 21, 2022)

Form of Restricted Stock Unit Award, dated as of February 23, 2022, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 21, 2022)

Form of Performance Stock Unit Award, dated as of February 23, 2022, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 21, 2022)

Form of Stock Option Award, dated as of February 23, 2022, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 21, 2022)

Exhibit A (Filed With SEC on February 16, 2022)

Fourteenth Supplemental Indenture, dated December 8, 2021, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on December 9, 2021)

Underwriting Agreement, dated December 1, 2021, by and among Marsh & McLennan Companies, Inc. and BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC,... (Filed With SEC on December 7, 2021)

Description of Compensation Arrangements for Independent Directors of Marsh & McLennan Companies, Inc. effective June 1, 2021 (Filed With SEC on July 22, 2021)

Letter Agreement, effective as of January 20, 2021, between Marsh & McLennan Companies, Inc. and Martine Ferland (Filed With SEC on April 27, 2021)

Form of Deferred Stock Unit Award, with grant dates from March 1, 2021 through February 1, 2022, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan... (Filed With SEC on April 27, 2021)

Form of Restricted Stock Unit Award, dated as of February 22, 2021, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 27, 2021)

Form of Performance Stock Unit Award, dated as of February 22, 2021, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 27, 2021)

Form of Stock Option Award, dated as of February 22, 2021, under the Marsh & McLennan Companies, Inc. 2020 Incentive and Stock Award Plan (Filed With SEC on April 27, 2021)

Amended and Restated 5 Year Credit Agreement, dated as of April 2, 2021, among Marsh & McLennan Companies, Inc., the designated subsidiaries party thereto as borrowers, Citibank,... (Filed With SEC on April 2, 2021)

Fourth Amendment to the Marsh & McLennan Companies Supplemental Savings & Investment Plan Restatement effective January 1, 2012 (Filed With SEC on February 17, 2021)

Underwriting Agreement, dated May 4, 2020, between Marsh & McLennan Companies, Inc. and BofA Securities, Inc. and Citigroup Global Markets Inc., as representatives of the several... (Filed With SEC on May 7, 2020)

Thirteenth Supplemental Indenture, dated May 7, 2020, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on May 7, 2020)

Letter Agreement, effective as of January 15, 2020, between Marsh & McLennan Companies, Inc. and John Q. Doyle (Filed With SEC on May 1, 2020)

Letter Agreement, effective as of March 1, 2019, between Marsh & McLennan Companies, Inc. and Martine Ferland (Filed With SEC on May 1, 2020)

Non-Competition and Non-Solicitation Agreement, effective as of March 1, 2019, between Marsh & McLennan Companies, Inc. and Martine Ferland (Filed With SEC on May 1, 2020)

Non-Competition and Non-Solicitation Agreement, effective as of April 1, 2019, between Marsh & McLennan Companies, Inc. and Dominic J. Burke (Filed With SEC on May 1, 2020)

Form of Deferred Stock Unit Award, with grant dates from March 1, 2020 through February 1, 2021, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on May 1, 2020)

Form of Restricted Stock Unit Award, dated as of February 19, 2020, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on May 1, 2020)

Form of Performance Stock Unit Award, dated as of February 19, 2020, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on May 1, 2020)

Form of Stock Option Award, dated as of February 19, 2020, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on May 1, 2020)

Letter Agreement, effective July 1, 2019, between Marsh & McLennan Companies, Inc. and Dominic J. Burke (Filed With SEC on April 29, 2020)

Amendment to Letter Agreement, effective as of April 29, 2020, between Marsh & McLennan Companies, Inc. and Dominic J. Burke (Filed With SEC on April 29, 2020)

Description of Marsh & McLennan Companies, Inc.s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934 (Filed With SEC on February 20, 2020)

Letter Agreement, dated as of September 18, 2019, between Marsh & McLennan Companies, Inc. and Daniel S. Glaser (Filed With SEC on October 30, 2019)

Form of Deferred Stock Unit Award, with grant dates from May 1, 2019 through February 1, 2020, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan Form... (Filed With SEC on August 2, 2019)

Form of Restricted Stock Unit Award, dated as of May 1, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan Form A (Filed With SEC on August 2, 2019)

Form of Restricted Stock Unit Award, dated as of May 1, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan Form B (Filed With SEC on August 2, 2019)

Form of Restricted Stock Unit Award, dated as of May 1, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan Form C (Filed With SEC on August 2, 2019)

Form of Performance Stock Unit Award, dated as of May 1, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on August 2, 2019)

Form of Stock Option Award, dated as of May 1, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on August 2, 2019)

Form of Deferred Stock Unit Award, with grant dates from March 1, 2019 through February 1, 2020, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 26, 2019)

Form of Restricted Stock Unit Award, dated as of February 19, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 26, 2019)

Form of Performance Stock Unit Award, dated as of February 19, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 26, 2019)

Form of Stock Option Award, dated as of February 19, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 26, 2019)

Letter Agreement, effective as of February 19, 2019, between Marsh & McLennan Companies, Inc. and Peter C. Hearn (Filed With SEC on April 26, 2019)

Non-Competition and Non-Solicitation Agreement, effective as of June 1, 2016, between Marsh & McLennan Companies, Inc. and Peter C. Hearn (Filed With SEC on April 26, 2019)

Underwriting Agreement, dated March 20, 2019, among Marsh & McLennan Companies, Inc., and Goldman Sachs & Co. LLC, Citigroup Global Markets Inc., Deutsche Bank Securities Inc.,... (Filed With SEC on March 21, 2019)

Twelfth Supplemental Indenture, dated March 21, 2019, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on March 21, 2019)

Paying Agency Agreement, dated March 21, 2019, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, London Branch, as paying agent (Filed With SEC on March 21, 2019)

Underwriting Agreement, dated March 14, 2019, among Marsh & McLennan Companies, Inc., and Goldman Sachs & Co. LLC, Citigroup Global Markets Limited, Deutsche Bank AG, London... (Filed With SEC on March 15, 2019)

Amendment to the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on February 21, 2019)

Third Amendment to the Marsh & McLennan Companies Supplemental Savings & Investment Plan Restatement effective January 1, 2012 (Filed With SEC on February 21, 2019)

Letter Agreement, effective as of January 16, 2019, between Marsh & McLennan, Inc. and Mark C. McGivney (Filed With SEC on February 21, 2019)

Letter Agreement, effective as of March 1, 2019, between Marsh & McLennan Companies, Inc. and Julio A. Portalatin (Filed With SEC on February 21, 2019)

Waiver and Release Agreement, dated as of February 14, 2019, between Marsh & McLennan Companies, Inc. and Julio A. Portalatin (Filed With SEC on February 21, 2019)

Eleventh Supplemental Indenture, dated January 15, 2019, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on January 15, 2019)

Calculation Agency Agreement, dated January 15, 2019, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as calculation agent (Filed With SEC on January 15, 2019)

Underwriting Agreement, dated January 8, 2019, among Marsh & McLennan Companies, Inc., and Goldman Sachs & Co. LLC, Citigroup Global Markets Inc., Deutsche Bank Securities Inc.... (Filed With SEC on January 11, 2019)

Rule 2.7 Announcement, dated as of September 18, 2018 (Filed With SEC on September 18, 2018)

Co-operation Agreement, dated as of September 18, 2018, by and among Marsh & McLennan Companies, Inc., MMC Treasury Holdings (UK) Limited and Jardine Lloyd Thompson Group plc (Filed With SEC on September 18, 2018)

Shareholder Undertaking, dated as of September 18, 2018 (Filed With SEC on September 18, 2018)

Form of Director Undertaking, dated as of September 18, 2018 (Filed With SEC on September 18, 2018)

Bridge Loan Agreement, dated as of September 18, 2018 by and between Marsh & McLennan Companies, Inc., the lenders party thereto and Goldman Sachs Bank USA, as administrative agent (Filed With SEC on September 18, 2018)

Description of Compensation Arrangements for Independent Directors of Marsh & McLennan Companies, Inc. effective June 1, 2018 (Filed With SEC on July 27, 2018)

Tenth Supplemental Indenture, dated as of March 1, 2018, between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on April 27, 2018)

Form of Deferred Stock Unit Award, with grant dates from March 1, 2018 through February 1, 2019, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 27, 2018)

Form of Restricted Stock Unit Award, dated as of February 21, 2018, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 27, 2018)

Form of Performance Stock Unit Award, dated as of February 21, 2018, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 27, 2018)

Form of Stock Option Award, dated as of February 21, 2018, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 27, 2018)

Letter Agreement, effective as of July 5, 2017, between Marsh & McLennan Companies, Inc. and John Q. Doyle (Filed With SEC on April 27, 2018)

Non-Competition and Non-Solicitation Agreement, dated as of February 25, 2016, between Marsh & McLennan Companies, Inc. and John Q. Doyle (Filed With SEC on April 27, 2018)

Underwriting Agreement, dated February 27, 2018, among Marsh & McLennan Companies, Inc., Citigroup Global Markets Inc. and Goldman Sachs & Co. LLC, as representatives of the... (Filed With SEC on March 1, 2018)

Form of Tenth Supplemental Indenture between Marsh & McLennan Companies, Inc. and The Bank of New York Mellon, as trustee (Filed With SEC on March 1, 2018)

Second Amendment to the Marsh & McLennan Companies Supplemental Savings & Investment Plan Restatement effective January 1, 2012 (Filed With SEC on February 22, 2018)

Letter Agreement, effective as of January 17, 2018, between Marsh & McLennan Companies, Inc. and Mark C. McGivney (Filed With SEC on February 22, 2018)

Letter Agreement, effective as of February 22, 2017, between Marsh & McLennan Companies, Inc. and Daniel S. Glaser (Filed With SEC on October 27, 2017)

Letter Agreement, effective as of July 12, 2017, between Marsh & McLennan Companies, Inc. and Julio A. Portalatin (Filed With SEC on October 27, 2017)

Form of Deferred Stock Unit Award, with grant dates from March 1, 2017 through February 1, 2018, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 28, 2017)

Form of Restricted Stock Unit Award, dated as of February 22, 2017, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 28, 2017)

Form of Performance Stock Unit Award, dated as of February 22, 2017, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 28, 2017)

Form of Stock Option Award, dated as of February 22, 2017, under the Marsh & McLennan Companies, Inc. 2011 Incentive and Stock Award Plan (Filed With SEC on April 28, 2017)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee ____________________ NINTH SUPPLEMENTAL INDENTURE Dated as of January 12, 2017... (Filed With SEC on February 24, 2017)

FIRST AMENDMENT TO THE MARSH & MCLENNAN COMPANIES SUPPLEMENTAL SAVINGS & INVESTMENT PLAN (Filed With SEC on February 24, 2017)

FIRST AMENDMENT TO THE MARSH & MCLENNAN COMPANIES BENEFIT EQUALIZATION PLAN AND MARSH & MCLENNAN COMPANIES SUPPLEMENTAL RETIREMENT PLAN AS RESTATED EFFECTIVE JANUARY 1, 2012 (Filed With SEC on February 24, 2017)

SECOND AMENDMENT TO THE MARSH & MCLENNAN COMPANIES BENEFIT EQUALIZATION PLAN AND MARSH & MCLENNAN COMPANIES SUPPLEMENTAL RETIREMENT PLAN AS RESTATED EFFECTIVE JANUARY 1, 2012 (Filed With SEC on February 24, 2017)

Marsh & McLennan Companies, Inc. $500,000,000 aggregate principal amount of 2.750% Senior Notes due 2022 $500,000,000 aggregate principal amount of 4.350% Senior Notes due 2047... (Filed With SEC on January 12, 2017)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee NINTHSUPPLEMENTAL INDENTURE Dated as of January 12, 2017 $500,000,000 aggregate principal amount... (Filed With SEC on January 12, 2017)

H. Edward HanwayChairman of the Compensation Committee of the Board of DirectorsMarsh & McLennan Companies, Inc.1166 Avenue of the AmericasNew York, New York 10036www.mmc.com (Filed With SEC on August 1, 2016)

MARSH & McLENNAN COMPANIES, INC. 2011 INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF RESTRICTED STOCK UNIT AWARDS GRANTED ON [DATE] TABLE OF CONTENTS (Filed With SEC on August 1, 2016)

Waiver and Release Agreement (Filed With SEC on August 1, 2016)

Daniel S. GlaserPresident and Chief Executive OfficerMarsh & McLennan Companies, Inc.1166 Avenue of the AmericasNew York, New York 10036212 ###-###-#### Fax 212 345 ***@*** (Filed With SEC on August 1, 2016)

Description of Compensation Arrangements for Independent Directors (Filed With SEC on August 1, 2016)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee ____________________ EIGHTH SUPPLEMENTAL INDENTURE Dated as of March 14, 2016... (Filed With SEC on May 2, 2016)

MARSH & McLENNAN COMPANIES, INC. 2011 INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF RESTRICTED STOCK UNIT, PERFORMANCE STOCK UNIT AND STOCK OPTION AWARDS GRANTED ON... (Filed With SEC on May 2, 2016)

MARSH & McLENNAN COMPANIES, INC. 2011 INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF DEFERRED STOCK UNIT AWARDS GRANTED ON [DATE], 2016 TABLE OF CONTENTS (Filed With SEC on May 2, 2016)

Marsh & McLennan Companies, Inc. $350,000,000 aggregate principal amount of 3.300% Senior Notes due 2023 UNDERWRITING AGREEMENT March 9, 2016 (Filed With SEC on March 14, 2016)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee EIGHTHSUPPLEMENTAL INDENTURE Dated as of March 14, 2016 $350,000,000aggregate principal amount... (Filed With SEC on March 14, 2016)

Daniel S. GlaserPresident and Chief Executive OfficerMarsh & McLennan Companies, Inc.1166 Avenue of the AmericasNew York, New York 10036212 ###-###-#### Fax 212 345 ***@*** (Filed With SEC on October 29, 2015)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on October 29, 2015)

Marsh & McLennan Companies, Inc. $600,000,000 aggregate principal amount of 3.750% Senior Notes due 2026 UNDERWRITING AGREEMENT September 9, 2015 (Filed With SEC on September 14, 2015)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee SEVENTHSUPPLEMENTAL INDENTURE Dated as of September 14, 2015 $600,000,000 aggregate principal... (Filed With SEC on September 14, 2015)

Exhibit 4.1 MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee ____________________ SIXTH SUPPLEMENTAL INDENTURE Dated as of March 6, 2015... (Filed With SEC on May 4, 2015)

Daniel S. GlaserPresident and Chief Executive OfficerMarsh & McLennan Companies, Inc.1166 Avenue of the AmericasNew York, New York 10036212 ###-###-#### Fax 212 345 ***@*** (Filed With SEC on May 4, 2015)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on May 4, 2015)

MARSH & McLENNAN COMPANIES, INC. 2011 INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF RESTRICTED STOCK UNIT, PERFORMANCE STOCK UNIT AND STOCK OPTION AWARDS GRANTED ON [DATE] (Filed With SEC on May 4, 2015)

MARSH & McLENNAN COMPANIES, INC. 2011 INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF DEFERRED STOCK UNIT AWARDS GRANTED ON [DATE], 2015 (Filed With SEC on May 4, 2015)

Marsh & McLennan Companies, Inc. $500,000,000 aggregate principal amount of 2.350% Senior Notes due 2020 UNDERWRITING AGREEMENT March 3, 2015 (Filed With SEC on March 6, 2015)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee SIXTHSUPPLEMENTAL INDENTURE Dated as of March 6, 2015 $500,000,000aggregate principal amount of... (Filed With SEC on March 6, 2015)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee FIFTHSUPPLEMENTAL INDENTURE Dated as of September 10, 2014 $300,000,000 aggregate principal... (Filed With SEC on September 10, 2014)

Marsh & McLennan Companies, Inc. $300,000,000 aggregate principal amount of 2.350% Senior Notes due 2019 UNDERWRITING AGREEMENT September 3, 2014 (Filed With SEC on September 9, 2014)

Marsh & McLennan Companies, Inc. $500,000,000 aggregate principal amount of 3.500% Senior Notes due 2025 UNDERWRITING AGREEMENT September 3, 2014 (Filed With SEC on September 9, 2014)

Description of Compensation Arrangements for Independent Directors (Filed With SEC on August 4, 2014)

Exhibit A Annual Base Salary$750,000 (effective April 1, 2014)Annual Target Bonus OpportunityBonus awards are discretionary. Anticipated target bonus of $1,250,000 commencing with... (Filed With SEC on August 4, 2014)

Exhibit A Annual Base Salary$1,000,000 (effective April 1, 2014)Annual Target Bonus OpportunityBonus awards are discretionary. Anticipated target bonus of $2,250,000 commencing... (Filed With SEC on August 4, 2014)

Exhibit A Board or Committee MembershipsHofstra University Board of TrusteesAnnual Base Salary$900,000 (effective April 1, 2014)Annual Target Bonus OpportunityBonus awards are... (Filed With SEC on August 4, 2014)

Exhibit A Board or Committee Memberships"British-American Business Association (BABA)"International Insurance Society (IIS)"BayardAnnual Base Salary$800,000Annual Target Bonus... (Filed With SEC on August 4, 2014)

Marsh & McLennan Companies, Inc. $600,000,000 aggregate principal amount of 3.500% Senior Notes due 2024 UNDERWRITING AGREEMENT May 27, 2014 (Filed With SEC on May 30, 2014)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee FOURTHSUPPLEMENTAL INDENTURE Dated as of May 30, 2014 $600,000,000aggregate principal amount of... (Filed With SEC on May 30, 2014)

Exhibit A Board or Committee Memberships"British-American Business Association (BABA)"International Insurance Society (IIS)"BayardAnnual Base Salary$800,000Annual Target Bonus... (Filed With SEC on May 8, 2014)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on May 8, 2014)

Exhibit A (Filed With SEC on February 27, 2014)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on February 27, 2014)

Exhibit A (Filed With SEC on February 27, 2014)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on February 27, 2014)

Exhibit A (Filed With SEC on February 27, 2014)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on February 27, 2014)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on November 7, 2013)

Marsh & McLennan Companies, Inc. $250,000,000 aggregate principal amount of 2.55% Senior Notes due 2018 $250,000,000 aggregate principal amount of 4.05% Senior Notes due 2023... (Filed With SEC on September 27, 2013)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee THIRDSUPPLEMENTAL INDENTURE Dated as of September 27, 2013 $250,000,000 aggregate principal... (Filed With SEC on September 27, 2013)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on May 9, 2013)

This document constitutes part of a prospectus covering securities that have been registered under the Securities Act of 1933. The date of this prospectus is July 15th, 2005.... (Filed With SEC on February 27, 2013)

This document constitutes part of a prospectus covering securities that have been registered under the Securities Act of 1933. The date of this prospectus is July 15th 2005. Marsh... (Filed With SEC on February 27, 2013)

Section 409A Amendment Regarding Payments Conditioned Upon Employment-Related Action to Any and All Plans or Arrangements Entered into by the Marsh & McLennan Companies, Inc., or... (Filed With SEC on February 27, 2013)

MARSH & MCLENNAN COMPANIES SUPPLEMENTAL SAVINGS & INVESTMENT PLAN (formerly the Marsh & McLennan Companies Stock Investment Supplemental Plan) Restatement effective January 1, 2012 (Filed With SEC on February 27, 2013)

Marsh & McLennan Companies Benefit Equalization Plan and Marsh & McLennan Companies Supplemental Retirement Plan As Restated Effective January 1, 2012 (Filed With SEC on February 27, 2013)

R E C I T A L S: (Filed With SEC on February 27, 2013)

H. Edward Hanway Chairman of the Compensation Committee of the Board of Directors Marsh & McLennan Companies, Inc.1166 Avenue of the Americas New York, New York 10036 www.mmc.com (Filed With SEC on February 27, 2013)

GENERAL RELEASE OF ALL CLAIMS (Filed With SEC on February 27, 2013)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on February 27, 2013)

MARSH & MCLENNAN COMPANIES, INC. NONSOLICITATION AGREEMENT (Filed With SEC on February 27, 2013)

MARSH & MCLENNAN COMPANIES, INC. CONFIDENTIALITY AGREEMENT (Filed With SEC on February 27, 2013)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on February 27, 2013)

NON-COMPETITION AND NON-SOLICITATION AGREEMENT (Filed With SEC on December 14, 2012)

Exhibit A (Filed With SEC on September 24, 2012)

MARSH & McLENNAN COMPANIES, INC. 2011 INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF DEFERRED STOCK UNIT AWARDS GRANTED ON [DATE] TABLE OF CONTENTS (Filed With SEC on May 8, 2012)

MARSH & McLENNAN COMPANIES, INC. 2011 INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF RESTRICTED STOCK UNITS, PERFORMANCE STOCK UNITS AND STOCK OPTIONS GRANTED ON [DATE]... (Filed With SEC on May 8, 2012)

Exhibit A Annual Base Salary$900,000Annual Target Bonus OpportunityBonus awards are discretionary. Anticipated target bonus of $1,800,000. Actual bonus may range from 0% - 200% of... (Filed With SEC on May 8, 2012)

Exhibit A Annual Base Salary$800,000Annual Target Bonus OpportunityBonus awards are discretionary. Anticipated target bonus of $1,300,000. Actual bonus may range from 0% - 200% of... (Filed With SEC on May 8, 2012)

Marsh & McLennan Companies, Inc. $250,000,000 aggregate principal amount of 2.300% Senior Notes due 2017 UNDERWRITING AGREEMENT March 7, 2012 (Filed With SEC on March 9, 2012)

MARSH & McLENNAN COMPANIES, INC., Issuer, and The Bank of New York Mellon, Trustee ____________________ SECOND SUPPLEMENTAL INDENTURE Dated as of March 12, 2012... (Filed With SEC on March 9, 2012)

Description of Compensation Arrangements for Independent Directors (Filed With SEC on February 28, 2012)

[Marsh & McLennan Companies Letterhead] (Filed With SEC on October 7, 2011)

MARSH & McLENNANCOMPANIES INC., Company AND THE BANK OF NEW YORK MELLON, Trustee INDENTURE Dated as of July 15, 2011 Senior DebtSecurities CROSS-REFERENCE TABLE* (Filed With SEC on August 5, 2011)

MARSH & McLENNANCOMPANIES INC., Issuer, and The Bank of New York Mellon, Trustee FIRSTSUPPLEMENTAL INDENTURE Dated as of July 15, 2011 $500,000,000 aggregate principal amount of... (Filed With SEC on August 5, 2011)

MARSH & McLENNAN COMPANIES, INC. 2000 SENIOR EXECUTIVE INCENTIVE ANDSTOCK AWARD PLAN AND 2000 EMPLOYEE INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF [YEAR]RESTRICTED... (Filed With SEC on August 5, 2011)

MARSH & McLENNAN COMPANIES, INC. 2000 SENIOR EXECUTIVE INCENTIVE ANDSTOCK AWARD PLAN AND 2000 EMPLOYEE INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF DEFERRED STOCKUNIT... (Filed With SEC on August 5, 2011)

Marsh & McLennan Companies, Inc. $500,000,000 aggregate principal amount of 4.800% Senior Notes due 2021 UNDERWRITING AGREEMENT (Filed With SEC on July 15, 2011)

MARSH & McLENNANCOMPANIES INC., Issuer, and The Bank of New York Mellon, Trustee FIRSTSUPPLEMENTAL INDENTURE Dated as of July 15, 2011 $500,000,000 aggregate principal amount of... (Filed With SEC on July 15, 2011)

EMPLOYMENT AGREEMENT (Filed With SEC on May 6, 2011)

DAVID A. NADLER AMENDMENT TO EMPLOYMENT AGREEMENT (Filed With SEC on May 6, 2011)

MARSH & McLENNAN LETTERHEAD (Filed With SEC on May 6, 2011)

MARSH & McLENNAN COMPANIES, INC. 2000 SENIOR EXECUTIVE INCENTIVE ANDSTOCK AWARD PLAN AND 2000 EMPLOYEE INCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF RESTRICTEDSTOCK UNIT... (Filed With SEC on May 6, 2011)

FIRST AMENDMENT TO THE MARSH & MCLENNAN COMPANIES SUPPLEMENTAL SAVINGS & INVESTMENT PLAN (Filed With SEC on February 28, 2011)

SECOND AMENDMENT TO THE MARSH & MCLENNAN COMPANIES SUPPLEMENTAL SAVINGS & INVESTMENT PLAN (Filed With SEC on February 28, 2011)

FIRST AMENDMENT TO THE MARSH & MCLENNAN COMPANIES BENEFIT EQUALIZATION PLAN AND MARSH & MCLENNAN COMPANIES SUPPLEMENTAL RETIREMENT PLAN (Filed With SEC on February 28, 2011)

[MMC Letterhead] (Filed With SEC on February 28, 2011)

STOCK PURCHASE AGREEMENT dated as of June 6, 2010 by and between Altegrity, Inc. asBuyer, and Marsh & McLennan Companies, Inc. as Seller* * This exhibit is a composite version... (Filed With SEC on August 6, 2010)

MARSH & McLENNAN COMPANIES, INC. 2000 SENIOR EXECUTIVE INCENTIVE AND STOCK AWARD PLAN AND 2000 EMPLOYEEINCENTIVE AND STOCK AWARD PLAN TERMS AND CONDITIONS OF DEFERRED STOCKUNIT... (Filed With SEC on August 6, 2010)

MARSH & McLENNAN COMPANIES, INC. 2000 SENIOR EXECUTIVE INCENTIVE AND STOCK AWARD PLAN AND 2000 EMPLOYEE INCENTIVE AND STOCKAWARD PLAN TERMS AND CONDITIONS OF [YEAR] LONG-TERM... (Filed With SEC on May 7, 2010)

[MMC Letterhead] (Filed With SEC on May 7, 2010)

MARSH & McLENNAN COMPANIES INC., Company (Filed With SEC on February 26, 2010)

BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. THE DATE OF THIS PROSPECTUS IS JUNE 5, 2009. (Filed With SEC on February 26, 2010)

AMENDMENT TO MARSH & MCLENNAN COMPANIES, INC. SENIOR EXECUTIVE SEVERANCE PAY PLAN (Filed With SEC on February 26, 2010)

MARSH & McLENNAN COMPANIES, INC. DIRECTORS STOCK COMPENSATION PLAN May 31, 2009 Restatement MARSH & McLENNAN COMPANIES, INC. DIRECTORS STOCK COMPENSATION PLAN May 31, 2009... (Filed With SEC on August 7, 2009)

Description of Compensation Arrangements for Independent Directors (Filed With SEC on August 7, 2009)

EMPLOYMENT AGREEMENT (Filed With SEC on August 7, 2009)

GENERAL RELEASE OF ALL CLAIMS (Filed With SEC on August 7, 2009)

GENERAL RELEASE OF ALL CLAIMS DATED MAY 8, 2008 (Filed With SEC on August 7, 2009)

MARSH & McLENNAN COMPANIES, INC. 2000 SENIOR EXECUTIVE INCENTIVE AND STOCK AWARD PLAN (Filed With SEC on May 8, 2009)

EMPLOYMENT AGREEMENT (Filed With SEC on May 8, 2009)

SUBCONTRACTOR ENGAGEMENT AGREEMENT (Filed With SEC on May 8, 2009)

Marsh & McLennan Companies, Inc. $400,000,000 aggregate principal amount of 9.25% SeniorNotes due 2019 UNDERWRITING AGREEMENT (Filed With SEC on March 23, 2009)

MARSH & McLENNAN COMPANIES INC., Issuer, and (Filed With SEC on March 23, 2009)

This document constitutes part of a prospectus covering securities that have been registered underthe Securities Act of 1933. The date of this prospectus is February 17, 2009. (Filed With SEC on February 27, 2009)

This document constitutes part of a prospectus covering securities that have been registered underthe Securities Act of 1933. The date of this prospectus is [Date]. MARSH &... (Filed With SEC on February 27, 2009)

THIS DOCUMENT CONSTITUTES PART OF A PROSPECTUS COVERING SECURITIES THAT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF1933. THE DATE OF THIS PROSPECTUS IS DECEMBER 10, 2008.... (Filed With SEC on February 27, 2009)

Section 409A Amendment Document (Filed With SEC on February 27, 2009)

MARSH & MCLENNAN COMPANIES SUPPLEMENTAL SAVINGS & INVESTMENT PLAN (formerly the Marsh & McLennan Companies Stock Investment Supplemental Plan) (Filed With SEC on February 27, 2009)

Marsh & McLennan Companies Benefit Equalization Plan (Filed With SEC on February 27, 2009)

MARSH & McLENNAN COMPANIES, INC. DIRECTORS STOCK COMPENSATION PLAN January 1, 2009 Restatement MARSH & McLENNAN COMPANIES, INC. DIRECTORS STOCK COMPENSATION PLAN January 1, 2009... (Filed With SEC on February 27, 2009)

M. MICHELE BURNS AMENDMENT TO EMPLOYMENT AGREEMENT (Filed With SEC on February 27, 2009)

This document constitutes part of a prospectus covering securities that have been registered underthe Securities Act of 1933. The date of this prospectus is [Date]. MARSH &... (Filed With SEC on May 8, 2008)

MARSH & MCLENNAN COMPANIES, INC. SENIOR EXECUTIVE SEVERANCE PAY PLAN (Filed With SEC on May 8, 2008)

This document constitutes part of a prospectus covering securities that have been registered underthe Securities Act of 1933. The date of this prospectus is [Date]. MARSH &... (Filed With SEC on February 29, 2008)

STOCK PURCHASE AGREEMENT dated as of January 31, 2007 between GREAT-WEST LIFECO INC. and MARSH & McLENNAN COMPANIES, INC. relating to the purchase and sale of PUTNAM INVESTMENTS... (Filed With SEC on February 1, 2007)

PUTNAM INVESTMENTS TRUST EQUITY PARTNERSHIP PLAN (Amended and Restated as of September 6, 2005) (Filed With SEC on March 2, 2006)

EMPLOYMENT AGREEMENT (Filed With SEC on March 2, 2006)

EX-10.1: AMENDMENTS TO SENIOR EXECUTIVE INCENTIVE AND STOCK AWARD PLAN (Filed With SEC on August 9, 2005)

EX-10.2: DESCRIPTION OF COMPENSATION ARRANGEMENT (Filed With SEC on August 9, 2005)

EX-10.3: DESCRIPTION OF AMENDMENT TO LETTER OF UNDERSTANDING (Filed With SEC on August 9, 2005)

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