{"transactions":[{"id":796454,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"EVP, CFO and COO"}}],"security":"Restricted Stock Units","published_at":"2026-05-01T20:09:34.000Z","date":"2026-05-01","kind":"grant","planned":false,"acquired":true,"shares":59627,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F2","text":"These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not applicable."}],"balance_after":59627,"derivative":{"underlying":"Common Stock","underlying_shares":59627},"source":{"system":"sec-edgar","filing":"0000062709-26-000104","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000006270926000104/form4.xml","form_type":"4"}},{"id":872723,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2026-03-03T21:07:39.000Z","date":"2026-02-28","kind":"exercise","planned":false,"acquired":false,"shares":17961,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 17,961 shares underlying restricted stock units of which 9,170 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 17,961 shares underlying restricted stock units relate to performance stock units that were granted on February 23, 2023 for the performance period 2023-2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not applicable."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":17961},"source":{"system":"sec-edgar","filing":"0000062709-26-000056","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000006270926000056/form4.xml","form_type":"4"}},{"id":872722,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-03-03T21:07:39.000Z","date":"2026-02-28","kind":"tax_withholding","planned":false,"acquired":false,"shares":9170,"price":186.74,"value":1712405.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 17,961 shares underlying restricted stock units of which 9,170 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 17,961 shares underlying restricted stock units relate to performance stock units that were granted on February 23, 2023 for the performance period 2023-2025."}],"balance_after":42469,"source":{"system":"sec-edgar","filing":"0000062709-26-000056","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000006270926000056/form4.xml","form_type":"4"}},{"id":872721,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-03-03T21:07:39.000Z","date":"2026-02-28","kind":"exercise","planned":false,"acquired":true,"shares":17961,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 17,961 shares underlying restricted stock units of which 9,170 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 17,961 shares underlying restricted stock units relate to performance stock units that were granted on February 23, 2023 for the performance period 2023-2025."}],"balance_after":51639,"source":{"system":"sec-edgar","filing":"0000062709-26-000056","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000006270926000056/form4.xml","form_type":"4"}},{"id":881193,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2026-02-26T21:43:01.000Z","date":"2026-02-24","kind":"grant","planned":false,"acquired":true,"shares":17961,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units relate to performance stock units that were granted on February 23, 2023 for the performance period 2023-2025. The performance factor for these performance stock units was determined on February 24, 2026."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable"}],"balance_after":17961,"derivative":{"underlying":"Common Stock","underlying_shares":17961},"source":{"system":"sec-edgar","filing":"0000062709-26-000050","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000006270926000050/form4.xml","form_type":"4"}},{"id":881192,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2026-02-26T21:43:01.000Z","date":"2026-02-24","kind":"grant","planned":false,"acquired":true,"shares":44743,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 24, 2026 and vest in four equal annual installments on February 24th of 2027, 2028, 2029 and 2030."}],"balance_after":44743,"derivative":{"exercise_price":176.99,"expiration_date":"2036-02-23","underlying":"Common Stock","underlying_shares":44743},"source":{"system":"sec-edgar","filing":"0000062709-26-000050","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000006270926000050/form4.xml","form_type":"4"}},{"id":1214194,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-03-11T20:05:07.000Z","date":"2025-03-10","kind":"sale","planned":true,"acquired":false,"shares":10510,"price":234.97,"value":2469534.7,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-25-009025","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760225009025/form4.xml","form_type":"4"}},{"id":1234275,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2025-03-04T21:16:22.000Z","date":"2025-02-28","kind":"exercise","planned":false,"acquired":false,"shares":21472,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 21,472 shares underlying restricted stock units of which 10,962 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 21,472 shares underlying restricted stock units relate to performance stock units that were granted on February 23, 2022 for the performance period 2022-2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not applicable."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":21472},"source":{"system":"sec-edgar","filing":"0001127602-25-007877","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760225007877/form4.xml","form_type":"4"}},{"id":1234274,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-03-04T21:16:22.000Z","date":"2025-02-28","kind":"tax_withholding","planned":false,"acquired":false,"shares":10962,"price":233.74,"value":2562257.88,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 21,472 shares underlying restricted stock units of which 10,962 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 21,472 shares underlying restricted stock units relate to performance stock units that were granted on February 23, 2022 for the performance period 2022-2024."}],"balance_after":44188,"source":{"system":"sec-edgar","filing":"0001127602-25-007877","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760225007877/form4.xml","form_type":"4"}},{"id":1234273,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-03-04T21:16:22.000Z","date":"2025-02-28","kind":"exercise","planned":false,"acquired":true,"shares":21472,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 21,472 shares underlying restricted stock units of which 10,962 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 21,472 shares underlying restricted stock units relate to performance stock units that were granted on February 23, 2022 for the performance period 2022-2024."}],"balance_after":55150,"source":{"system":"sec-edgar","filing":"0001127602-25-007877","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760225007877/form4.xml","form_type":"4"}},{"id":1257990,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2025-02-20T21:20:09.000Z","date":"2025-02-18","kind":"grant","planned":false,"acquired":true,"shares":21472,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units relate to performance stock units that were granted on February 23, 2022 for the performance period 2022-2024. The performance factor for these performance stock units was determined on February 18, 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not applicable."}],"balance_after":21472,"derivative":{"underlying":"Common Stock","underlying_shares":21472},"source":{"system":"sec-edgar","filing":"0001127602-25-005978","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760225005978/form4.xml","form_type":"4"}},{"id":1257989,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2025-02-20T21:20:09.000Z","date":"2025-02-18","kind":"grant","planned":false,"acquired":true,"shares":31404,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 18, 2025 and vest in four equal annual installments on February 18th of 2026, 2027, 2028 and 2029."}],"balance_after":31404,"derivative":{"exercise_price":230.29,"expiration_date":"2035-02-17","underlying":"Common Stock","underlying_shares":31404},"source":{"system":"sec-edgar","filing":"0001127602-25-005978","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760225005978/form4.xml","form_type":"4"}},{"id":1423897,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2024-08-26T20:05:59.000Z","date":"2024-08-22","kind":"exercise","planned":true,"acquired":false,"shares":50928,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These options were granted on February 19, 2020 and vested in four equal annual installments on February 19th of 2021, 2022, 2023 and 2024."}],"balance_after":0,"derivative":{"exercise_price":118.865,"expiration_date":"2030-02-18","underlying":"Common Stock","underlying_shares":50928},"source":{"system":"sec-edgar","filing":"0001127602-24-022910","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224022910/form4.xml","form_type":"4"}},{"id":1423896,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-08-26T20:05:59.000Z","date":"2024-08-22","kind":"sale","planned":true,"acquired":false,"shares":50928,"price":225.2224,"value":11470126.3872,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $225 to $225.580. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-24-022910","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224022910/form4.xml","form_type":"4"}},{"id":1423895,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-08-26T20:05:59.000Z","date":"2024-08-22","kind":"exercise","planned":true,"acquired":true,"shares":50928,"price":118.865,"value":6053556.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":84606,"source":{"system":"sec-edgar","filing":"0001127602-24-022910","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224022910/form4.xml","form_type":"4"}},{"id":1440161,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2024-08-06T20:07:30.000Z","date":"2024-08-05","kind":"exercise","planned":true,"acquired":false,"shares":5200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"These options were granted on February 19, 2020 and vested in four equal annual installments on February 19th of 2021, 2022, 2023 and 2024."}],"balance_after":50928,"derivative":{"exercise_price":118.865,"expiration_date":"2030-02-18","underlying":"Common Stock","underlying_shares":5200},"source":{"system":"sec-edgar","filing":"0001127602-24-021705","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224021705/form4.xml","form_type":"4"}},{"id":1440160,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2024-08-06T20:07:30.000Z","date":"2024-08-02","kind":"exercise","planned":true,"acquired":false,"shares":10265,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"These options were granted on February 19, 2020 and vested in four equal annual installments on February 19th of 2021, 2022, 2023 and 2024."}],"balance_after":56128,"derivative":{"exercise_price":118.865,"expiration_date":"2030-02-18","underlying":"Common Stock","underlying_shares":10265},"source":{"system":"sec-edgar","filing":"0001127602-24-021705","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224021705/form4.xml","form_type":"4"}},{"id":1440159,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-08-06T20:07:30.000Z","date":"2024-08-05","kind":"sale","planned":true,"acquired":false,"shares":5200,"price":225.03,"value":1170156.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-24-021705","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224021705/form4.xml","form_type":"4"}},{"id":1440158,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-08-06T20:07:30.000Z","date":"2024-08-05","kind":"exercise","planned":true,"acquired":true,"shares":5200,"price":118.865,"value":618098.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":38878,"source":{"system":"sec-edgar","filing":"0001127602-24-021705","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224021705/form4.xml","form_type":"4"}},{"id":1440157,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-08-06T20:07:30.000Z","date":"2024-08-02","kind":"sale","planned":true,"acquired":false,"shares":400,"price":227.3075,"value":90923.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.290 to $227.325. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-24-021705","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224021705/form4.xml","form_type":"4"}},{"id":1440156,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-08-06T20:07:30.000Z","date":"2024-08-02","kind":"sale","planned":true,"acquired":false,"shares":6074,"price":226.7542,"value":1377305.0108,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $226.210 to $227.190. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4."}],"balance_after":34078,"source":{"system":"sec-edgar","filing":"0001127602-24-021705","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224021705/form4.xml","form_type":"4"}},{"id":1440155,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-08-06T20:07:30.000Z","date":"2024-08-02","kind":"sale","planned":true,"acquired":false,"shares":3791,"price":225.7664,"value":855880.4224,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $225.140 to $226.130. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4."}],"balance_after":40152,"source":{"system":"sec-edgar","filing":"0001127602-24-021705","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224021705/form4.xml","form_type":"4"}},{"id":1440154,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-08-06T20:07:30.000Z","date":"2024-08-02","kind":"exercise","planned":true,"acquired":true,"shares":10265,"price":118.865,"value":1220149.225,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":43943,"source":{"system":"sec-edgar","filing":"0001127602-24-021705","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224021705/form4.xml","form_type":"4"}},{"id":1593181,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-03-06T21:03:11.000Z","date":"2024-03-04","kind":"sale","planned":true,"acquired":false,"shares":12494,"price":200.79,"value":2508670.26,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-24-008783","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224008783/form4.xml","form_type":"4"}},{"id":1609197,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2024-03-01T21:09:01.000Z","date":"2024-02-28","kind":"exercise","planned":false,"acquired":false,"shares":25526,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 25,526 shares underlying restricted stock units of which 13,032 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 25,526 shares underlying restricted stock units relate to performance stock units that were granted on February 21, 2021 for the performance period 2021-2023."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable"}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":25526},"source":{"system":"sec-edgar","filing":"0001127602-24-007829","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224007829/form4.xml","form_type":"4"}},{"id":1609196,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-03-01T21:09:01.000Z","date":"2024-02-28","kind":"tax_withholding","planned":false,"acquired":false,"shares":13032,"price":202.985,"value":2645300.52,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 25,526 shares underlying restricted stock units of which 13,032 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 25,526 shares underlying restricted stock units relate to performance stock units that were granted on February 21, 2021 for the performance period 2021-2023."}],"balance_after":46172,"source":{"system":"sec-edgar","filing":"0001127602-24-007829","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224007829/form4.xml","form_type":"4"}},{"id":1609195,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-03-01T21:09:01.000Z","date":"2024-02-28","kind":"exercise","planned":false,"acquired":true,"shares":25526,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 25,526 shares underlying restricted stock units of which 13,032 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 25,526 shares underlying restricted stock units relate to performance stock units that were granted on February 21, 2021 for the performance period 2021-2023."}],"balance_after":59204,"source":{"system":"sec-edgar","filing":"0001127602-24-007829","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224007829/form4.xml","form_type":"4"}},{"id":1624105,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2024-02-23T21:32:56.000Z","date":"2024-02-22","kind":"grant","planned":false,"acquired":true,"shares":25526,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units relate to performance stock units that were granted on February 22, 2021 for the performance period 2021-2023. The performance factor for these performance stock units was determined on February 22, 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable"}],"balance_after":25526,"derivative":{"underlying":"Common Stock","underlying_shares":25526},"source":{"system":"sec-edgar","filing":"0001127602-24-006667","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224006667/form4.xml","form_type":"4"}},{"id":1624104,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2024-02-23T21:32:56.000Z","date":"2024-02-22","kind":"grant","planned":false,"acquired":true,"shares":34642,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 22, 2024 and vest in four equal annual installments on February 22nd of 2025, 2026, 2027 and 2028."}],"balance_after":34642,"derivative":{"exercise_price":200.468,"expiration_date":"2034-02-21","underlying":"Common Stock","underlying_shares":34642},"source":{"system":"sec-edgar","filing":"0001127602-24-006667","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760224006667/form4.xml","form_type":"4"}},{"id":1841737,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2023-06-30T20:03:35.000Z","date":"2023-06-29","kind":"exercise","planned":true,"acquired":false,"shares":70106,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 19, 2019 and vested in four equal annual installments on February 19th of 2020, 2021, 2022 and 2023."}],"balance_after":0,"derivative":{"exercise_price":90.785,"expiration_date":"2029-02-18","underlying":"Common Stock","underlying_shares":70106},"source":{"system":"sec-edgar","filing":"0001127602-23-019610","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223019610/form4.xml","form_type":"4"}},{"id":1841736,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-06-30T20:03:35.000Z","date":"2023-06-29","kind":"sale","planned":true,"acquired":false,"shares":70106,"price":185.5274,"value":13006583.9044,"ownership":{"direct":true},"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-23-019610","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223019610/form4.xml","form_type":"4"}},{"id":1841735,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-06-30T20:03:35.000Z","date":"2023-06-29","kind":"exercise","planned":true,"acquired":true,"shares":70106,"price":90.785,"value":6364573.21,"ownership":{"direct":true},"balance_after":103784,"source":{"system":"sec-edgar","filing":"0001127602-23-019610","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223019610/form4.xml","form_type":"4"}},{"id":1967774,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-03-07T21:27:09.000Z","date":"2023-03-03","kind":"sale","acquired":false,"shares":11531,"price":162.41,"value":1872749.71,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-23-009296","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223009296/form4.xml","form_type":"4"}},{"id":1982390,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2023-03-02T22:02:54.000Z","date":"2023-02-28","kind":"exercise","acquired":false,"shares":23558,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 23,558 shares underlying restricted stock units of which 12,027 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 23,558 shares underlying restricted stock units relate to performance stock units that were granted on February 19, 2020 for the performance period 2020-2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable"}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":23558},"source":{"system":"sec-edgar","filing":"0001127602-23-008425","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223008425/form4.xml","form_type":"4"}},{"id":1982389,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-03-02T22:02:54.000Z","date":"2023-02-28","kind":"tax_withholding","acquired":false,"shares":12027,"price":162.83,"value":1958356.41,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 23,558 shares underlying restricted stock units of which 12,027 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 23,558 shares underlying restricted stock units relate to performance stock units that were granted on February 19, 2020 for the performance period 2020-2022."}],"balance_after":45209,"source":{"system":"sec-edgar","filing":"0001127602-23-008425","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223008425/form4.xml","form_type":"4"}},{"id":1982388,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-03-02T22:02:54.000Z","date":"2023-02-28","kind":"exercise","acquired":true,"shares":23558,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 23,558 shares underlying restricted stock units of which 12,027 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 23,558 shares underlying restricted stock units relate to performance stock units that were granted on February 19, 2020 for the performance period 2020-2022."}],"balance_after":57236,"source":{"system":"sec-edgar","filing":"0001127602-23-008425","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223008425/form4.xml","form_type":"4"}},{"id":1991968,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2023-02-27T21:11:26.000Z","date":"2023-02-23","kind":"grant","acquired":true,"shares":23558,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units relate to performance stock units that were granted on February 19, 2020 for the performance period 2020-2022. The performance factor for these performance stock units was determined on February 23, 2023."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable"}],"balance_after":23558,"derivative":{"underlying":"Common Stock","underlying_shares":23558},"source":{"system":"sec-edgar","filing":"0001127602-23-007288","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223007288/form4.xml","form_type":"4"}},{"id":1991967,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2023-02-27T21:11:26.000Z","date":"2023-02-23","kind":"grant","acquired":true,"shares":39955,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 23, 2023 and vest in four equal annual installments on February 23rd of 2024, 2025, 2026 and 2027."}],"balance_after":39955,"derivative":{"exercise_price":164.145,"expiration_date":"2033-02-22","underlying":"Common Stock","underlying_shares":39955},"source":{"system":"sec-edgar","filing":"0001127602-23-007288","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760223007288/form4.xml","form_type":"4"}},{"id":2091726,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2022-12-09T21:03:10.000Z","date":"2022-12-08","kind":"exercise","acquired":false,"shares":61510,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 21, 2018 and vested in four equal annual installments on February 21st of 2019, 2020, 2021 and 2022."}],"balance_after":0,"derivative":{"exercise_price":83.046,"expiration_date":"2028-02-20","underlying":"Common Stock","underlying_shares":61510},"source":{"system":"sec-edgar","filing":"0001127602-22-027172","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222027172/form4.xml","form_type":"4"}},{"id":2091725,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-12-09T21:03:10.000Z","date":"2022-12-08","kind":"sale","acquired":false,"shares":61510,"price":170,"value":10456700.0,"ownership":{"direct":true},"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-22-027172","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222027172/form4.xml","form_type":"4"}},{"id":2091724,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-12-09T21:03:10.000Z","date":"2022-12-08","kind":"exercise","acquired":true,"shares":61510,"price":83.046,"value":5108159.46,"ownership":{"direct":true},"balance_after":95188,"source":{"system":"sec-edgar","filing":"0001127602-22-027172","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222027172/form4.xml","form_type":"4"}},{"id":2346459,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-03-08T21:11:34.000Z","date":"2022-03-04","kind":"sale","acquired":false,"shares":7695,"price":155,"value":1192725.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-22-008571","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222008571/form4.xml","form_type":"4"}},{"id":2363753,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2022-03-02T21:18:58.000Z","date":"2022-02-28","kind":"exercise","acquired":false,"shares":15721,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 15,721 shares underlying restricted stock units of which 8,026 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 15,721 shares underlying restricted stock units relate to 2,295 restricted stock units that were granted on February 19, 2019 and 13,426 restricted stock units relating to performance stock units that were granted on February 19, 2019 for the performance period 2019-2021."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":15721},"source":{"system":"sec-edgar","filing":"0001127602-22-007679","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222007679/form4.xml","form_type":"4"}},{"id":2363752,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-03-02T21:18:58.000Z","date":"2022-02-28","kind":"tax_withholding","acquired":false,"shares":8026,"price":153.985,"value":1235883.61,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 15,721 shares underlying restricted stock units of which 8,026 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 15,721 shares underlying restricted stock units relate to 2,295 restricted stock units that were granted on February 19, 2019 and 13,426 restricted stock units relating to performance stock units that were granted on February 19, 2019 for the performance period 2019-2021."}],"balance_after":41373,"source":{"system":"sec-edgar","filing":"0001127602-22-007679","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222007679/form4.xml","form_type":"4"}},{"id":2363751,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-03-02T21:18:58.000Z","date":"2022-02-28","kind":"exercise","acquired":true,"shares":15721,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 15,721 shares underlying restricted stock units of which 8,026 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 15,721 shares underlying restricted stock units relate to 2,295 restricted stock units that were granted on February 19, 2019 and 13,426 restricted stock units relating to performance stock units that were granted on February 19, 2019 for the performance period 2019-2021."}],"balance_after":49399,"source":{"system":"sec-edgar","filing":"0001127602-22-007679","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222007679/form4.xml","form_type":"4"}},{"id":2376845,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2022-02-24T21:38:55.000Z","date":"2022-02-23","kind":"grant","acquired":true,"shares":13426,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units relate to performance stock units that were granted on February 19, 2019 for the performance period 2019-2021. The performance factor for these performance stock units was determined on February 23, 2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":15721,"derivative":{"underlying":"Common Stock","underlying_shares":13426},"source":{"system":"sec-edgar","filing":"0001127602-22-006578","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222006578/form4.xml","form_type":"4"}},{"id":2376844,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2022-02-24T21:38:55.000Z","date":"2022-02-23","kind":"grant","acquired":true,"shares":51787,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 23rd, 2022 and vest in four equal annual installments on February 23rd of 2023, 2024, 2025 and 2026."}],"balance_after":51787,"derivative":{"exercise_price":151.368,"expiration_date":"2032-02-22","underlying":"Common Stock","underlying_shares":51787},"source":{"system":"sec-edgar","filing":"0001127602-22-006578","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760222006578/form4.xml","form_type":"4"}},{"id":2484610,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2021-12-06T21:06:40.000Z","date":"2021-12-03","kind":"exercise","acquired":false,"shares":58295,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 22, 2017 and vested in four equal annual installments on February 22nd of 2018, 2019, 2020 and 2021."}],"balance_after":0,"derivative":{"exercise_price":73.195,"expiration_date":"2027-02-21","underlying":"Common Stock","underlying_shares":58295},"source":{"system":"sec-edgar","filing":"0001127602-21-030349","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221030349/form4.xml","form_type":"4"}},{"id":2484609,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-12-06T21:06:40.000Z","date":"2021-12-03","kind":"sale","acquired":false,"shares":58295,"price":167.6868,"value":9775302.006,"ownership":{"direct":true},"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-21-030349","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221030349/form4.xml","form_type":"4"}},{"id":2484608,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-12-06T21:06:40.000Z","date":"2021-12-03","kind":"exercise","acquired":true,"shares":58295,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":91973,"source":{"system":"sec-edgar","filing":"0001127602-21-030349","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221030349/form4.xml","form_type":"4"}},{"id":2804862,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-03-08T21:14:58.000Z","date":"2021-03-08","kind":"sale","acquired":false,"shares":6125,"price":115.28,"value":706090.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-21-009673","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221009673/form4.xml","form_type":"4"}},{"id":2824456,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2021-03-02T21:42:41.000Z","date":"2021-02-28","kind":"exercise","acquired":false,"shares":12005,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 12,005 shares underlying restricted stock units of which 5,880 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 12,005 shares underlying restricted stock units relate to 2,258 restricted stock units that were granted on February 21, 2018, 7,452 restricted stock units relating to performance stock units that were granted on February 21, 2018 for the performance period 2018-2020 and 2,295 restricted stock units that were granted on February 19, 2019."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable."}],"balance_after":2295,"derivative":{"underlying":"Common Stock","underlying_shares":12005},"source":{"system":"sec-edgar","filing":"0001127602-21-008731","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221008731/form4.xml","form_type":"4"}},{"id":2824455,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-03-02T21:42:41.000Z","date":"2021-02-28","kind":"tax_withholding","acquired":false,"shares":5880,"price":116.83,"value":686960.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 12,005 shares underlying restricted stock units of which 5,880 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 12,005 shares underlying restricted stock units relate to 2,258 restricted stock units that were granted on February 21, 2018, 7,452 restricted stock units relating to performance stock units that were granted on February 21, 2018 for the performance period 2018-2020 and 2,295 restricted stock units that were granted on February 19, 2019."}],"balance_after":39803,"source":{"system":"sec-edgar","filing":"0001127602-21-008731","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221008731/form4.xml","form_type":"4"}},{"id":2824454,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-03-02T21:42:41.000Z","date":"2021-02-28","kind":"exercise","acquired":true,"shares":12005,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 12,005 shares underlying restricted stock units of which 5,880 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 12,005 shares underlying restricted stock units relate to 2,258 restricted stock units that were granted on February 21, 2018, 7,452 restricted stock units relating to performance stock units that were granted on February 21, 2018 for the performance period 2018-2020 and 2,295 restricted stock units that were granted on February 19, 2019."}],"balance_after":45683,"source":{"system":"sec-edgar","filing":"0001127602-21-008731","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221008731/form4.xml","form_type":"4"}},{"id":2837695,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2021-02-24T21:12:56.000Z","date":"2021-02-22","kind":"grant","acquired":true,"shares":7452,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units relate to performance stock units that were granted on February 21, 2018 for the performance period 2018-2020. The performance factor for these performance stock units was determined on February 22, 2021."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":14300,"derivative":{"underlying":"Common Stock","underlying_shares":7452},"source":{"system":"sec-edgar","filing":"0001127602-21-007570","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221007570/form4.xml","form_type":"4"}},{"id":2837694,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2021-02-24T21:12:56.000Z","date":"2021-02-22","kind":"grant","acquired":true,"shares":67421,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 22, 2021 and vest in four equal annual installments on February 22nd of 2022, 2023, 2024 and 2025."}],"balance_after":67421,"derivative":{"exercise_price":117.53,"expiration_date":"2031-02-21","underlying":"Common Stock","underlying_shares":67421},"source":{"system":"sec-edgar","filing":"0001127602-21-007570","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760221007570/form4.xml","form_type":"4"}},{"id":2979176,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2020-11-17T21:04:30.000Z","date":"2020-11-16","kind":"exercise","acquired":false,"shares":32439,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 22, 2016 and vested in four equal annual installments on February 22nd of 2017, 2018, 2019 and 2020."}],"balance_after":0,"derivative":{"exercise_price":57.325,"expiration_date":"2026-02-21","underlying":"Common Stock","underlying_shares":32439},"source":{"system":"sec-edgar","filing":"0001127602-20-029231","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220029231/form4.xml","form_type":"4"}},{"id":2979175,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-11-17T21:04:30.000Z","date":"2020-11-16","kind":"sale","acquired":false,"shares":32439,"price":114.908,"value":3727500.612,"ownership":{"direct":true},"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-20-029231","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220029231/form4.xml","form_type":"4"}},{"id":2979174,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-11-17T21:04:30.000Z","date":"2020-11-16","kind":"exercise","acquired":true,"shares":32439,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":66117,"source":{"system":"sec-edgar","filing":"0001127602-20-029231","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220029231/form4.xml","form_type":"4"}},{"id":3221899,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-03-09T20:07:17.000Z","date":"2020-03-05","kind":"sale","acquired":false,"shares":8465,"price":106.825,"value":904273.625,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-20-009953","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220009953/form4.xml","form_type":"4"}},{"id":3236598,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2020-03-03T21:18:03.000Z","date":"2020-02-28","kind":"exercise","acquired":false,"shares":16590,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 16,590 shares underlying restricted stock units of which 8,125 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 16,590 shares underlying restricted stock units relate to 1,993 restricted stock units that were granted on February 22, 2017, 10,044 restricted stock units relating to performance stock units that were granted on February 22, 2017 for the performance period 2017-2019, 2,258 restricted stock units that were granted on February 21, 2018 and 2,295 restricted stock units that were granted on February 19, 2019."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable."}],"balance_after":6848,"derivative":{"underlying":"Common Stock","underlying_shares":16590},"source":{"system":"sec-edgar","filing":"0001127602-20-008969","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220008969/form4.xml","form_type":"4"}},{"id":3236597,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-03-03T21:18:03.000Z","date":"2020-02-28","kind":"tax_withholding","acquired":false,"shares":8125,"price":109.57,"value":890256.25,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 16,590 shares underlying restricted stock units of which 8,125 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 16,590 shares underlying restricted stock units relate to 1,993 restricted stock units that were granted on February 22, 2017, 10,044 restricted stock units relating to performance stock units that were granted on February 22, 2017 for the performance period 2017-2019, 2,258 restricted stock units that were granted on February 21, 2018 and 2,295 restricted stock units that were granted on February 19, 2019."}],"balance_after":42143,"source":{"system":"sec-edgar","filing":"0001127602-20-008969","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220008969/form4.xml","form_type":"4"}},{"id":3236596,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-03-03T21:18:03.000Z","date":"2020-02-28","kind":"exercise","acquired":true,"shares":16590,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 16,590 shares underlying restricted stock units of which 8,125 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 16,590 shares underlying restricted stock units relate to 1,993 restricted stock units that were granted on February 22, 2017, 10,044 restricted stock units relating to performance stock units that were granted on February 22, 2017 for the performance period 2017-2019, 2,258 restricted stock units that were granted on February 21, 2018 and 2,295 restricted stock units that were granted on February 19, 2019."}],"balance_after":50268,"source":{"system":"sec-edgar","filing":"0001127602-20-008969","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220008969/form4.xml","form_type":"4"}},{"id":3247935,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2020-02-26T21:12:58.000Z","date":"2020-02-24","kind":"exercise","acquired":false,"shares":32440,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These options were granted on February 22, 2016 and vested in four equal annual installments on February 22nd of 2017, 2018, 2019 and 2020."}],"balance_after":32439,"derivative":{"exercise_price":57.325,"expiration_date":"2026-02-21","underlying":"Common Stock","underlying_shares":32440},"source":{"system":"sec-edgar","filing":"0001127602-20-007913","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220007913/form4.xml","form_type":"4"}},{"id":3247934,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2020-02-26T21:12:58.000Z","date":"2020-02-24","kind":"exercise","acquired":false,"shares":15433,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These options were granted on February 23, 2015 and vested in four equal annual installments on February 23rd of 2016, 2017, 2018 and 2019."}],"balance_after":0,"derivative":{"exercise_price":56.84,"expiration_date":"2025-02-22","underlying":"Common Stock","underlying_shares":15433},"source":{"system":"sec-edgar","filing":"0001127602-20-007913","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220007913/form4.xml","form_type":"4"}},{"id":3247933,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-02-26T21:12:58.000Z","date":"2020-02-24","kind":"sale","acquired":false,"shares":47873,"price":113.9319,"value":5454261.8487,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-20-007913","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220007913/form4.xml","form_type":"4"}},{"id":3247932,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-02-26T21:12:58.000Z","date":"2020-02-24","kind":"exercise","acquired":true,"shares":32440,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":81551,"source":{"system":"sec-edgar","filing":"0001127602-20-007913","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220007913/form4.xml","form_type":"4"}},{"id":3247931,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-02-26T21:12:58.000Z","date":"2020-02-24","kind":"exercise","acquired":true,"shares":15433,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":49111,"source":{"system":"sec-edgar","filing":"0001127602-20-007913","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220007913/form4.xml","form_type":"4"}},{"id":3258367,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2020-02-21T21:23:57.000Z","date":"2020-02-19","kind":"grant","acquired":true,"shares":10044,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units relate to performance stock units that were granted on February 22, 2017 for the performance period 2017-2019. The performance factor for these performance stock units was determined on February 19, 2020."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":23438,"derivative":{"underlying":"Common Stock","underlying_shares":10044},"source":{"system":"sec-edgar","filing":"0001127602-20-006979","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220006979/form4.xml","form_type":"4"}},{"id":3258366,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2020-02-21T21:23:57.000Z","date":"2020-02-19","kind":"grant","acquired":true,"shares":66393,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 19, 2020 and vest in four equal annual installments on February 19th of 2021, 2022, 2023 and 2024."}],"balance_after":66393,"derivative":{"exercise_price":118.865,"expiration_date":"2030-02-18","underlying":"Common Stock","underlying_shares":66393},"source":{"system":"sec-edgar","filing":"0001127602-20-006979","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760220006979/form4.xml","form_type":"4"}},{"id":3607520,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2019-03-07T21:03:12.000Z","date":"2019-03-05","kind":"sale","acquired":false,"shares":6519,"price":92.6325,"value":603871.2675,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-19-010417","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219010417/form4.xml","form_type":"4"}},{"id":3621979,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2019-03-04T22:07:19.000Z","date":"2019-02-28","kind":"exercise","acquired":false,"shares":12778,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 12,778 shares underlying restricted stock units of which 6,259 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 12,778 shares underlying restricted stock units relate to 2,181 restricted stock units that were granted on February 22, 2016, 6,346 restricted stock units relating to performance stock units that were granted on February 22, 2016 for the performance period 2016-2018, 1,993 restricted stock units that were granted on February 22, 2017 and 2,258 restricted stock units that were granted on February 21, 2018."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable."}],"balance_after":13394,"derivative":{"underlying":"Common Stock","underlying_shares":12778},"source":{"system":"sec-edgar","filing":"0001127602-19-009558","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219009558/form4.xml","form_type":"4"}},{"id":3621978,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2019-03-04T22:07:19.000Z","date":"2019-02-28","kind":"tax_withholding","acquired":false,"shares":6259,"price":92.49,"value":578894.91,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 12,778 shares underlying restricted stock units of which 6,259 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 12,778 shares underlying restricted stock units relate to 2,181 restricted stock units that were granted on February 22, 2016, 6,346 restricted stock units relating to performance stock units that were granted on February 22, 2016 for the performance period 2016-2018, 1,993 restricted stock units that were granted on February 22, 2017 and 2,258 restricted stock units that were granted on February 21, 2018."}],"balance_after":40197,"source":{"system":"sec-edgar","filing":"0001127602-19-009558","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219009558/form4.xml","form_type":"4"}},{"id":3621977,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2019-03-04T22:07:19.000Z","date":"2019-02-28","kind":"exercise","acquired":true,"shares":12778,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 12,778 shares underlying restricted stock units of which 6,259 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 12,778 shares underlying restricted stock units relate to 2,181 restricted stock units that were granted on February 22, 2016, 6,346 restricted stock units relating to performance stock units that were granted on February 22, 2016 for the performance period 2016-2018, 1,993 restricted stock units that were granted on February 22, 2017 and 2,258 restricted stock units that were granted on February 21, 2018."}],"balance_after":46456,"source":{"system":"sec-edgar","filing":"0001127602-19-009558","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219009558/form4.xml","form_type":"4"}},{"id":3630600,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2019-02-27T21:06:05.000Z","date":"2019-02-25","kind":"exercise","acquired":false,"shares":13867,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These options were granted on February 24, 2014 and vested in four equal annual installments on February 24th of 2015, 2016, 2017 and 2018."}],"balance_after":0,"derivative":{"exercise_price":48,"expiration_date":"2024-02-23","underlying":"Common Stock","underlying_shares":13867},"source":{"system":"sec-edgar","filing":"0001127602-19-008669","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219008669/form4.xml","form_type":"4"}},{"id":3630599,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2019-02-27T21:06:05.000Z","date":"2019-02-25","kind":"sale","acquired":false,"shares":13867,"price":92.908,"value":1288355.236,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-19-008669","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219008669/form4.xml","form_type":"4"}},{"id":3630598,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2019-02-27T21:06:05.000Z","date":"2019-02-25","kind":"exercise","acquired":true,"shares":13867,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":47545,"source":{"system":"sec-edgar","filing":"0001127602-19-008669","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219008669/form4.xml","form_type":"4"}},{"id":3644161,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2019-02-21T21:06:14.000Z","date":"2019-02-19","kind":"grant","acquired":true,"shares":6346,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F5","text":"These restricted stock units relate to performance stock units that were granted on February 22, 2016 for the performance period 2016-2018. The performance factor for these performance stock units was determined on February 19, 2019."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":26172,"derivative":{"underlying":"Common Stock","underlying_shares":6346},"source":{"system":"sec-edgar","filing":"0001127602-19-007525","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219007525/form4.xml","form_type":"4"}},{"id":3644160,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2019-02-21T21:06:14.000Z","date":"2019-02-19","kind":"grant","acquired":true,"shares":6885,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units vest in three equal annual installments on February 28th of 2020, 2021 and 2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":19826,"derivative":{"underlying":"Common Stock","underlying_shares":6885},"source":{"system":"sec-edgar","filing":"0001127602-19-007525","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219007525/form4.xml","form_type":"4"}},{"id":3644159,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2019-02-21T21:06:14.000Z","date":"2019-02-19","kind":"grant","acquired":true,"shares":70106,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 19, 2019 and vest in four equal annual installments on February 19th of 2020, 2021, 2022 and 2023."}],"balance_after":70106,"derivative":{"exercise_price":90.785,"expiration_date":"2029-02-18","underlying":"Common Stock","underlying_shares":70106},"source":{"system":"sec-edgar","filing":"0001127602-19-007525","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760219007525/form4.xml","form_type":"4"}},{"id":4022847,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2018-03-02T21:15:34.000Z","date":"2018-02-28","kind":"exercise","acquired":false,"shares":9829,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 9,829 shares underlying restricted stock units of which 4,816 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 9,829 shares underlying restricted stock units relate to 2,053 restricted stock units that were granted on February 23, 2015, 3,603 restricted stock units relating to performance stock units that were granted on February 23, 2015 for the performance period 2015-2017, 2,181 restricted stock units that were granted on February 22, 2016 and 1,992 restricted stock units that were granted on February 22, 2017."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable."}],"balance_after":12941,"derivative":{"underlying":"Common Stock","underlying_shares":9829},"source":{"system":"sec-edgar","filing":"0001127602-18-009656","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009656/form4.xml","form_type":"4"}},{"id":4022846,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2018-03-02T21:15:34.000Z","date":"2018-02-28","kind":"tax_withholding","acquired":false,"shares":4816,"price":84.87,"value":408733.92,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 9,829 shares underlying restricted stock units of which 4,816 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 9,829 shares underlying restricted stock units relate to 2,053 restricted stock units that were granted on February 23, 2015, 3,603 restricted stock units relating to performance stock units that were granted on February 23, 2015 for the performance period 2015-2017, 2,181 restricted stock units that were granted on February 22, 2016 and 1,992 restricted stock units that were granted on February 22, 2017."}],"balance_after":33678,"source":{"system":"sec-edgar","filing":"0001127602-18-009656","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009656/form4.xml","form_type":"4"}},{"id":4022845,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2018-03-02T21:15:34.000Z","date":"2018-02-28","kind":"exercise","acquired":true,"shares":9829,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 9,829 shares underlying restricted stock units of which 4,816 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 9,829 shares underlying restricted stock units relate to 2,053 restricted stock units that were granted on February 23, 2015, 3,603 restricted stock units relating to performance stock units that were granted on February 23, 2015 for the performance period 2015-2017, 2,181 restricted stock units that were granted on February 22, 2016 and 1,992 restricted stock units that were granted on February 22, 2017."}],"balance_after":38494,"source":{"system":"sec-edgar","filing":"0001127602-18-009656","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009656/form4.xml","form_type":"4"}},{"id":4029216,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"exercise","acquired":false,"shares":4249,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"These options were granted on February 24, 2014 and vested in four equal annual installments on February 24th of 2015, 2016, 2017 and 2018."}],"balance_after":13867,"derivative":{"exercise_price":48,"expiration_date":"2024-02-23","underlying":"Common Stock","underlying_shares":4249},"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4029215,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"exercise","acquired":false,"shares":13105,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These options were granted on February 25, 2013 and vested in four equal annual installments on February 25th of 2014, 2015, 2016 and 2017."}],"balance_after":0,"derivative":{"exercise_price":36.495,"expiration_date":"2023-02-24","underlying":"Common Stock","underlying_shares":13105},"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4029214,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"exercise","acquired":false,"shares":5174,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These options were granted on February 24, 2012 and vested in four equal annual installments on February 24th of 2013, 2014, 2015 and 2016."}],"balance_after":0,"derivative":{"exercise_price":31.885,"expiration_date":"2022-02-23","underlying":"Common Stock","underlying_shares":5174},"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4029213,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"sale","acquired":false,"shares":4249,"price":83.59,"value":355173.91,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":28665,"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4029212,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"exercise","acquired":true,"shares":4249,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":32914,"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4029211,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"sale","acquired":false,"shares":13105,"price":83.59,"value":1095446.95,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":28665,"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4029210,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"exercise","acquired":true,"shares":13105,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":41770,"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4029209,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"sale","acquired":false,"shares":5174,"price":83.59,"value":432494.66,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":28665,"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4029208,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2018-02-28T21:16:58.000Z","date":"2018-02-26","kind":"exercise","acquired":true,"shares":5174,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."}],"balance_after":33839,"source":{"system":"sec-edgar","filing":"0001127602-18-009095","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218009095/form4.xml","form_type":"4"}},{"id":4039072,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2018-02-23T21:21:43.000Z","date":"2018-02-21","kind":"grant","acquired":true,"shares":3603,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F5","text":"These restricted stock units relate to performance stock units that were granted on February 23, 2015 for the performance period 2015-2017. The performance factor for these performance stock units was determined on February 21, 2018."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":22770,"derivative":{"underlying":"Common Stock","underlying_shares":3603},"source":{"system":"sec-edgar","filing":"0001127602-18-008061","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218008061/form4.xml","form_type":"4"}},{"id":4039071,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2018-02-23T21:21:43.000Z","date":"2018-02-21","kind":"grant","acquired":true,"shares":6774,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units vest in three equal annual installments on February 28th of 2019, 2020 and 2021."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":19167,"derivative":{"underlying":"Common Stock","underlying_shares":6774},"source":{"system":"sec-edgar","filing":"0001127602-18-008061","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218008061/form4.xml","form_type":"4"}},{"id":4039070,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2018-02-23T21:21:43.000Z","date":"2018-02-21","kind":"grant","acquired":true,"shares":61510,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"These options were granted on February 21, 2018 and vest in four equal annual installments on February 21st of 2019, 2020, 2021 and 2022."}],"balance_after":61510,"derivative":{"exercise_price":83.046,"expiration_date":"2028-02-20","underlying":"Common Stock","underlying_shares":61510},"source":{"system":"sec-edgar","filing":"0001127602-18-008061","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760218008061/form4.xml","form_type":"4"}},{"id":4412595,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2017-03-02T21:26:20.000Z","date":"2017-02-28","kind":"exercise","acquired":false,"shares":11040,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 11,040 shares underlying restricted stock units of which 5,726 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 11,040 shares underlying restricted stock units relate to 2,431 restricted stock units that were granted on February 24, 2014, 4,376 restricted stock units relating to performance stock units that were granted on February 24, 2014 for the performance period 2014-2016, 2,053 restricted stock units that were granted on February 23, 2015, and 2,180 restricted stock units that were granted on February 22, 2016."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable."}],"balance_after":12393,"derivative":{"underlying":"Common Stock","underlying_shares":11040},"source":{"system":"sec-edgar","filing":"0001127602-17-009710","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760217009710/form4.xml","form_type":"4"}},{"id":4412594,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2017-03-02T21:26:20.000Z","date":"2017-02-28","kind":"tax_withholding","acquired":false,"shares":5726,"price":73.28,"value":419601.28,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 11,040 shares underlying restricted stock units of which 5,726 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 11,040 shares underlying restricted stock units relate to 2,431 restricted stock units that were granted on February 24, 2014, 4,376 restricted stock units relating to performance stock units that were granted on February 24, 2014 for the performance period 2014-2016, 2,053 restricted stock units that were granted on February 23, 2015, and 2,180 restricted stock units that were granted on February 22, 2016."}],"balance_after":28665,"source":{"system":"sec-edgar","filing":"0001127602-17-009710","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760217009710/form4.xml","form_type":"4"}},{"id":4412593,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2017-03-02T21:26:20.000Z","date":"2017-02-28","kind":"exercise","acquired":true,"shares":11040,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Vesting and distribution to reporting person of 11,040 shares underlying restricted stock units of which 5,726 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 11,040 shares underlying restricted stock units relate to 2,431 restricted stock units that were granted on February 24, 2014, 4,376 restricted stock units relating to performance stock units that were granted on February 24, 2014 for the performance period 2014-2016, 2,053 restricted stock units that were granted on February 23, 2015, and 2,180 restricted stock units that were granted on February 22, 2016."}],"balance_after":34391,"source":{"system":"sec-edgar","filing":"0001127602-17-009710","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760217009710/form4.xml","form_type":"4"}},{"id":4426725,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2017-02-24T21:11:43.000Z","date":"2017-02-22","kind":"grant","acquired":true,"shares":4376,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F5","text":"These restricted stock units relate to performance stock units that were granted on February 24, 2014 for the performance period 2014-2016. The performance factor for these performance stock units was determined on February 22, 2017."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":23433,"derivative":{"underlying":"Common Stock","underlying_shares":4376},"source":{"system":"sec-edgar","filing":"0001127602-17-008216","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760217008216/form4.xml","form_type":"4"}},{"id":4426724,"issuer":{"id":1501,"kind":"organization","name":"MARSH & MCLENNAN COMPANIES, INC.","symbol":"MRSH"},"owners":[{"id":50474,"kind":"person","name":"MCGIVNEY MARK C","position":1,"cik":"0001269360","reported_name":"MCGIVNEY MARK C","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2017-02-24T21:11:43.000Z","date":"2017-02-22","kind":"grant","acquired":true,"shares":5978,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"These restricted stock units vest in three equal annual installments on February 28th of 2018, 2019 and 2020."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Not Applicable."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Not Applicable."}],"balance_after":19057,"derivative":{"underlying":"Common Stock","underlying_shares":5978},"source":{"system":"sec-edgar","filing":"0001127602-17-008216","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/62709/000112760217008216/form4.xml","form_type":"4"}}],"next_cursor":"2017-02-24T21:11:43.000000Z,4426724"}