| 2023-08-29 | FANJUL OSCAR | Director | Sell | 3,000 | $194.90 | $584,700.00 | -4.5% | → |
| 2023-07-26 | Klisura Dean Michael | President & CEO, Guy Carpenter | Sale+OE | 12,976 | $192.20 | $2,494,013.15 | -38.3% | → |
| 2023-06-29 | MCGIVNEY MARK C | Chief Financial Officer | Sale+OE | 70,106 | $185.53 | $13,006,583.90 | -67.5% | → |
| 2023-05-03 | FANJUL OSCAR | Director | Sell | 5,500 | $179.72 | $988,460.00 | -7.8% | → |
| 2023-04-25 | FANJUL OSCAR | Director | Sell | 5,500 | $179.38 | $986,595.50 | -7.3% | → |
| 2023-03-06 | Klisura Dean Michael | President & CEO, Guy Carpenter | Sell | 3,140 | $165.22 | $518,790.80 | -13.0% | → |
| 2023-03-03 | Mills Stacy | Vice President and Controller | Sell | 1,276 | $162.41 | $207,235.16 | -30.4% | → |
| 2023-03-03 | MCGIVNEY MARK C | Chief Financial Officer | Sell | 11,531 | $162.41 | $1,872,749.71 | -25.5% | → |
| 2023-02-08 | FANJUL OSCAR | Director | Sell | 2,900 | $173.70 | $503,731.16 | -3.7% | → |
| 2023-02-03 | FANJUL OSCAR | Director | Sell | 5,750 | $171.96 | $988,797.60 | -6.8% | → |
| 2022-12-13 | Beswick Paul | SVP, Chief Information Officer | Sell | 1,171 | $176.75 | $206,974.25 | -12.6% | → |
| 2022-12-09 | Klisura Dean Michael | President & CEO, Guy Carpenter | Sell | 8,694 | $172.34 | $1,498,315.27 | -29.7% | → |
| 2022-12-08 | MCGIVNEY MARK C | Chief Financial Officer | Sale+OE | 61,510 | $170.00 | $10,456,700.00 | -64.6% | → |
| 2022-11-29 | FANJUL OSCAR | Director | Sell | 6,000 | $169.27 | $1,015,620.00 | -3.4% | → |
| 2022-04-25 | South Martin | President & CEO, Marsh | Sell | 2,950 | $169.26 | $499,311.10 | -69.4% | → |
| 2022-03-29 | Beswick Paul | SVP, Chief Information Officer | Sell | 1,791 | $171.21 | $306,637.11 | -16.2% | → |
| 2022-03-18 | Ferland Martine | President and CEO, Mercer | Sell | 4,797 | $158.28 | $759,269.16 | -66.1% | → |
| 2022-03-04 | MCGIVNEY MARK C | Chief Financial Officer | Sell | 7,695 | $155.00 | $1,192,725.00 | -18.6% | → |
| 2022-03-04 | Mills Stacy | Vice President and Controller | Sell | 1,488 | $155.00 | $230,640.00 | -33.7% | → |
| 2022-03-04 | Glaser Daniel S | President and CEO, MMC | Sell | 32,322 | $154.60 | $4,996,981.20 | -24.2% | → |
| 2022-03-04 | Ferland Martine | President and CEO, Mercer | Sell | 5,621 | $155.00 | $871,255.00 | -69.6% | → |
| 2021-12-03 | OKEN MARC D | Director | Buy | 5,000 | $167.46 | $837,289.50 | +10.2% | → |
| 2021-12-03 | MCGIVNEY MARK C | Chief Financial Officer | Sale+OE | 58,295 | $167.69 | $9,775,302.01 | -63.4% | → |
| 2021-12-02 | Ferland Martine | President and CEO, Mercer | Sale+OE | 9,192 | $167.12 | $1,536,203.81 | -76.9% | → |
| 2021-11-29 | Glaser Daniel S | President and CEO, MMC | Sale+OE | 237,110 | $167.63 | $39,746,488.48 | -70.1% | → |
| 2021-08-31 | SCHAPIRO MORTON O | Director | Sell | 9,078 | $157.18 | $1,426,930.03 | -100% | → |
| 2021-06-02 | McDonald Scott | President and CEO of OWG | Sale+OE | 112,051 | $138.95 | $15,569,964.27 | -74.9% | → |
| 2021-03-08 | MCGIVNEY MARK C | Chief Financial Officer | Sell | 6,125 | $115.28 | $706,090.00 | -15.4% | → |
| 2021-03-04 | Ferland Martine | President and CEO, Mercer | Sell | 2,162 | $115.28 | $249,235.36 | -43.9% | → |
| 2021-03-04 | Glaser Daniel S | President and CEO, MMC | Sell | 27,142 | $115.28 | $3,128,929.76 | -21.2% | → |
| 2021-03-04 | HEARN PETER C | President & CEO, Guy Carpenter | Sell | 4,418 | $115.28 | $509,307.04 | -30.9% | → |
| 2021-03-04 | McDonald Scott | President and CEO of OWG | Sell | 4,437 | $115.28 | $511,497.36 | -19.1% | → |
| 2021-03-04 | Mills Stacy | Vice President and Controller | Sell | 1,434 | $115.28 | $165,311.52 | -32.9% | → |
| 2020-12-11 | Glaser Daniel S | President and CEO, MMC | Sale+OE | 314,516 | $115.39 | $36,291,560.92 | -75.7% | → |
| 2020-11-16 | MCGIVNEY MARK C | Chief Financial Officer | Sale+OE | 32,439 | $114.91 | $3,727,500.61 | -49.1% | → |
| 2020-11-16 | Yates Lloyd M | Director | Sell | 6,658 | $115.17 | $766,781.22 | -21.7% | → |
| 2020-08-25 | Ferland Martine | President and CEO, Mercer | Sell | 2,940 | $112.90 | $331,920.12 | -51.6% | → |
| 2020-08-03 | Ledford Laurie | SVP & Chief HR Officer | Sell | 4,114 | $115.78 | $476,298.35 | -31.5% | → |
| 2020-03-05 | McDonald Scott | President and CEO of OWG | Sale+OE | 40,297 | $106.81 | $4,304,158.84 | -68.2% | → |
| 2020-03-05 | MCGIVNEY MARK C | Chief Financial Officer | Sell | 8,465 | $106.83 | $904,273.63 | -20.1% | → |
| 2020-03-05 | Glaser Daniel S | President and CEO, MMC | Sale+OE | 248,347 | $106.81 | $26,526,787.45 | -59.6% | → |
| 2020-03-05 | Mills Stacy | Vice President and Controller | Sell | 1,270 | $106.83 | $135,674.86 | -30.3% | → |
| 2020-03-05 | Gilbert E Scott | SVP, Chief Information Officer | Sell | 4,114 | $106.89 | $439,748.75 | -8.7% | → |
| 2020-03-04 | HEARN PETER C | President & CEO, Guy Carpenter | Sell | 7,774 | $107.46 | $835,394.04 | -44.5% | → |
| 2020-02-24 | MCGIVNEY MARK C | Chief Financial Officer | Sale+OE | 47,873 | $113.93 | $5,454,261.85 | -58.7% | → |
| 2020-02-24 | Gilbert E Scott | SVP, Chief Information Officer | Sale+OE | 43,253 | $113.93 | $4,927,701.83 | -50.0% | → |
| 2020-02-19 | McDonald Scott | President and CEO of OWG | Sell | 5,972 | $119.39 | $712,980.36 | -24.1% | → |
| 2019-11-25 | Ledford Laurie | SVP & Chief HR Officer | Sell | 4,305 | $108.03 | $465,051.93 | -32.5% | → |