Marsh & McLennan Companies, Inc.
US ˙ NYSE ˙ US5717481023
DIESES SYMBOL IST NICHT MEHR AKTIV

SecurityMMC / Marsh & McLennan Companies, Inc.
InstitutionFmr Llc
Latest Disclosed Ownership10,180,705 shares
Latest Disclosed Value $ 1,765,843,388
Fmr Llc reports 33.13% decrease in ownership of MMC / Marsh & McLennan Companies, Inc.

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 10,180,705 shares of Marsh & McLennan Companies, Inc. (US:MMC) valued at $1,765,843,388 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,225,442 shares of Marsh & McLennan Companies, Inc.. This represents a change in shares of -33.13% during the quarter. The current value of the position is $1,860,014,804 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MARSH & MCLENNAN COS COM 571748102 10,180,705 -5,044,737 -33.13 1,765,843 -37.48 0.0185
2026-02-17 2025-12-31 13F MARSH & MCLENNAN COS COM 571748102 15,225,442 -1,229,642 -7.47 2,824,624 -14.82 0.1440
2025-11-13 2025-09-30 13F MARSH & MCLENNAN COS COM 571748102 16,455,084 -3,581,890 -17.88 3,316,193 -24.30 0.1724
2025-08-14 2025-06-30 13F MARSH & MCLENNAN COS COM 571748102 20,036,974 -2,114,616 -9.55 4,380,884 -18.96 0.2470
2025-05-12 2025-03-31 13F MARSH & MCLENNAN COS COM 571748102 22,151,590 917,186 4.32 5,405,653 19.85 0.3451
2025-02-13 2024-12-31 13F MARSH & MCLENNAN COS COM 571748102 21,234,404 -210,706 -0.98 4,510,400 -5.72 0.2692
2024-11-13 2024-09-30 13F MARSH & MCLENNAN COS COM 571748102 21,445,110 518,185 2.48 4,784,190 8.49 0.2911
2024-08-13 2024-06-30 13F MARSH & MCLENNAN COS COM 571748102 20,926,925 1,711,801 8.91 4,409,722 11.41 0.2822
2024-05-13 2024-03-31 13F MARSH & MCLENNAN COS COM 571748102 19,215,124 -253,028 -1.30 3,957,931 7.30 0.2657
2024-02-13 2023-12-31 13F MARSH & MCLENNAN COS COM 571748102 19,468,152 45,016 0.23 3,688,631 -0.21 0.2833
2023-11-13 2023-09-30 13F MARSH & MCLENNAN COS COM 571748102 19,423,136 61,408 0.32 3,696,223 1.50 0.3195
2023-08-11 2023-06-30 13F MARSH & MCLENNAN COS COM 571748102 19,361,728 794,799 4.28 3,641,554 17.76 0.3053
2023-08-11 2023-03-31 13F/A-1 MARSH & MCLENNAN COS COM 571748102 18,566,929 -765,425 -3.96 3,092,322 -3.34 0.2829
2023-05-11 2023-03-31 13F MARSH & MCLENNAN COS COM 571748102 18,566,929 -765,425 3,092,322 0.2829
2023-02-13 2022-12-31 13F MARSH & MCLENNAN COS COM 571748102 19,332,354 -1,202,315 -5.86 3,199,118 4.35 0.3178
2022-11-10 2022-09-30 13F MARSH & MCLENNAN COS COM 571748102 20,534,669 1,589,032 8.39 3,065,621 4.23 0.3197
2022-08-12 2022-06-30 13F MARSH & MCLENNAN COS COM 571748102 18,945,637 1,503,889 8.62 2,941,311 -1.05 0.2931
2022-05-13 2022-03-31 13F MARSH & MCLENNAN COS COM 571748102 17,441,748 3,697,937 26.91 2,972,423 24.42 0.2375
2022-02-14 2021-12-31 13F MARSH & MCLENNAN COS COM 571748102 13,743,811 1,741,161 14.51 2,388,948 31.44 0.1764
2022-02-14 2021-09-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 12,002,650 2,029,482 20.35 1,817,560 29.55 0.1442
2021-11-15 2021-09-30 13F MARSH & MCLENNAN COS COM 571748102 12,002,650 2,029,482 1,817,560 0.0278
2021-08-13 2021-06-30 13F MARSH & MCLENNAN COS COM 571748102 9,973,168 16,832 0.17 1,403,024 15.70 0.1099
2021-05-14 2021-03-31 13F MARSH & MCLENNAN COS COM 571748102 9,956,336 -2,492,712 -20.02 1,212,682 -16.74 0.1036
2021-02-08 2020-12-31 13F MARSH & MCLENNAN COS COM 571748102 12,449,048 319,737 2.64 1,456,538 4.69 0.1296
2020-11-13 2020-09-30 13F MARSH & MCLENNAN COS COM 571748102 12,129,311 -61,398 -0.50 1,391,232 6.29 0.1406
2020-08-24 2020-06-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 12,190,709 -2,119,765 -14.81 1,308,917 5.79 0.1439
2020-08-13 2020-06-30 13F MARSH & MCLENNAN COS COM 571748102 12,190,709 -2,119,765 1,308,917 32,156.2603
2020-05-14 2020-03-31 13F MARSH & MCLENNAN COS COM 571748102 14,310,474 -1,031,839 -6.73 1,237,284 -27.61 0.1713
2020-02-07 2019-12-31 13F MARSH & MCLENNAN COS COM 571748102 15,342,313 695,443 4.75 1,709,286 16.64 0.1886
2019-11-13 2019-09-30 13F MARSH & MCLENNAN COS COM 571748102 14,646,870 1,824,575 14.23 1,465,419 14.57 0.1758
2019-08-13 2019-06-30 13F MARSH & MCLENNAN COS COM 571748102 12,822,295 2,140,753 20.04 1,279,023 27.52 0.1494
2019-05-13 2019-03-31 13F MARSH & MCLENNAN COS COM 571748102 10,681,542 2,327,487 27.86 1,002,997 50.55 0.1202
2019-02-13 2018-12-31 13F MARSH & MCLENNAN COS COM 571748102 8,354,055 544,951 6.98 666,236 3.14 0.0913
2018-11-09 2018-09-30 13F MARSH & MCLENNAN COS COM 571748102 7,809,104 1,962,468 33.57 645,969 34.79 0.0727
2018-08-10 2018-06-30 13F MARSH & MCLENNAN COS COM 571748102 5,846,636 -374,512 -6.02 479,249 -6.73 0.0566
2018-05-14 2018-03-31 13F MARSH & MCLENNAN COS COM 571748102 6,221,148 -1,964,697 -24.00 513,805 -22.88 0.0610
2018-02-12 2017-12-31 13F MARSH & MCLENNAN COS COM 571748102 8,185,845 -1,455,451 -15.10 666,246 -17.55 0.0781
2017-11-13 2017-09-30 13F MARSH & MCLENNAN COS COM 571748102 9,641,296 -1,051,661 -9.84 808,038 -3.07 0.0977
2017-08-29 2017-06-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 10,692,957 -1,158,736 -9.78 833,623 -4.81 0.1036
2017-08-11 2017-06-30 13F MARSH & MCLENNAN COS COM 571748102 10,692,957 -1,158,736 833,623
2017-05-11 2017-03-31 13F MARSH & MCLENNAN COS COM 571748102 11,851,693 -459,733 -3.73 875,722 5.24 0.1113
2017-02-10 2016-12-31 13F MARSH & MCLENNAN COS COM 571748102 12,311,426 -3,216,952 -20.72 832,129 -20.32 0.1112
2016-11-14 2016-09-30 13F MARSH & MCLENNAN COS COM 571748102 15,528,378 -1,151,698 -6.90 1,044,284 -8.55 0.1391
2016-08-11 2016-06-30 13F MARSH & MCLENNAN COS COM 571748102 16,680,076 3,868,048 30.19 1,141,918 46.62 0.1559
2016-05-16 2016-03-31 13F MARSH & MCLENNAN COS COM 571748102 12,812,028 1,509,541 13.36 778,844 24.27 0.1078
2016-02-12 2015-12-31 13F MARSH & MCLENNAN COS COM 571748102 11,302,487 -1,929,048 -14.58 626,723 -9.30 0.0843
2015-11-10 2015-09-30 13F MARSH & MCLENNAN COS COM 571748102 13,231,535 -1,984,373 -13.04 690,951 -19.91 0.0984
2015-08-25 2015-06-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 15,215,908 -1,313,157 -7.94 862,741 -6.94 0.1106
2015-08-13 2015-06-30 13F MARSH & MCLENNAN COS COM 571748102 15,215,908 862,741
2015-05-14 2015-03-31 13F MARSH & MCLENNAN COS COM 571748102 16,529,065 -1,911,620 -10.37 927,115 -12.17 0.1181
2015-02-17 2014-12-31 13F MARSH & MCLENNAN COS COM 571748102 18,440,685 -869,817 -4.50 1,055,545 4.44 0.1373
2014-11-14 2014-09-30 13F MARSH & MCLENNAN COS COM 571748102 19,310,502 97,855 0.51 1,010,712 1.52 0.1369
2014-08-14 2014-06-30 13F MARSH & MCLENNAN COS COM 571748102 19,212,647 1,661,854 9.47 995,599 15.06 0.1334
2014-05-15 2014-03-31 13F MARSH & MCLENNAN COS COM 571748102 17,550,793 794,743 4.74 865,254 6.78 0.1201
2014-02-13 2013-12-31 13F MARSH & MCLENNAN COS COM 571748102 16,756,050 -48 -0.00 810,322 11.04 0.1145
2013-11-14 2013-09-30 13F MARSH & MCLENNAN COS COM 571748102 16,756,098 2,191,765 15.05 729,728 25.51 0.1118
2013-09-24 2013-06-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 14,564,333 14,564,333 581,408 0.0952
2013-08-14 2013-06-30 13F MARSH & MCLENNAN COS COM 571748102 14,564,333 581,408 0.0952
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.