Marsh & McLennan CosMRSH
13F holders, Q1 2026 (March 31)1,547holders −47
115new positions
163sold out
11famous investors
$173.50avg. 13F price*
At the end of Q1 2026, 1,547 institutions reported holding Marsh & McLennan Cos (MRSH) in their 13F filings, down 47 from Q4 2025. 115 opened new positions and 163 sold out. The largest holders were BlackRock, Inc. ($7.3B), Vanguard Capital Management LLC ($5.5B) and State Street Corp. ($3.8B). 11 famous investors held it, including Bill Nygren (1.2% of Harris Associates (Oakmark Funds)'s portfolio), Tom Gayner (1.1% of Markel Group's portfolio) and Cliff Asness (0.3% of AQR Capital Management's portfolio).
- Company
- Marsh & McLennan Cos
- Sector
- Finance
- CUSIP
- 571748102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 115 | $1.4B |
| Exits | 163 | $1.0B |
All 13F filers, Q4 2025 → Q1 2026: 44,373,373 shares bought and 33,149,860 shares sold, net +11,223,513 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 1,547 holders
| BlackRock, Inc. | 0.13% | Add +4.0% | 42,061,676 | $7.3B |
| Vanguard Capital Management LLC | 0.14% | — | 31,467,674 | $5.5B |
| State Street Corp. | 0.13% | Add +0.9% | 22,070,945 | $3.8B |
| Capital World Investors | 0.43% | Add +6.2% | 17,969,182 | $3.1B |
| Wellington Management Group LLP | 0.56% | Add +8.6% | 17,370,709 | $3.0B |
| Capital International Investors | 0.64% | Reduce -16.3% | 15,713,853 | $2.7B |
| Geode Capital Management, LLC | 0.14% | Add +15.1% | 13,404,172 | $2.3B |
| Vanguard Portfolio Management LLC | 0.11% | — | 12,427,946 | $2.2B |
| Capital Research Global Investors | 0.30% | Add +41.5% | 11,301,188 | $2.0B |
| T. Rowe Price Associates Inc. | 0.22% | Add +19.1% | 10,976,286 | $1.9B |
| FMR LLC | 0.09% | Reduce -33.1% | 10,180,705 | $1.8B |
| Massachusetts Financial Services Co. | 0.48% | Reduce -5.3% | 8,200,309 | $1.4B |
| Morgan Stanley | 0.07% | Reduce -5.8% | 6,473,992 | $1.1B |
| Clearbridge Investments, LLC | 0.97% | Add +26.5% | 6,423,531 | $1.1B |
| JPMorgan Chase & Co. | 0.07% | Add +42.4% | 6,093,392 | $1.1B |
| Ameriprise Financial Inc. | 0.22% | Add +14.6% | 5,488,537 | $951.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.19% | Add +14.0% | 5,182,517 | $898.9M |
| Harris Associates (Oakmark Funds) | 1.20% | New | 5,169,119 | $896.6M |
| Northern Trust Corp. | 0.11% | Reduce -6.3% | 4,965,079 | $861.2M |
| Bank of America Corp. | 0.06% | Reduce -10.6% | 4,939,614 | $856.8M |
| Artisan Partners Limited Partnership | 1.38% | Add +45.2% | 4,875,857 | $845.7M |
| UBS Group AG | 0.15% | Add +24.6% | 4,721,091 | $818.9M |
| American Century Companies Inc. | 0.38% | Add +81.7% | 4,234,327 | $734.4M |
| Nuveen, LLC | 0.20% | Add +8.0% | 4,167,487 | $722.9M |
| Ninety One UK Ltd | 1.62% | Add +13.8% | 4,029,142 | $698.9M |
| Invesco Ltd. | 0.07% | Add +12.3% | 3,884,778 | $673.8M |
| Deutsche Bank AG | 0.21% | Add +10.0% | 3,704,174 | $642.5M |
| AQR Capital Management | 0.29% | Add +148.6% | 3,673,987 | $637.3M |
| Goldman Sachs Group Inc. | 0.08% | Reduce -8.5% | 3,672,959 | $637.1M |
| Mawer Investment Management Ltd. | 3.90% | Reduce -11.0% | 3,475,590 | $602.8M |
| Arrowstreet Capital, Limited Partnership | 0.32% | Add +25.3% | 3,454,586 | $599.2M |
| Royal Bank of Canada | 0.11% | Add +4.7% | 3,316,579 | $575.3M |
| Bank of New York Mellon Corp | 0.10% | Reduce -2.0% | 3,254,021 | $564.4M |
| Legal & General Group Plc | 0.12% | Reduce -2.5% | 3,066,184 | $531.8M |
| Charles Schwab Investment Management Inc. | 0.08% | Add +2.8% | 3,033,148 | $526.1M |
| Vanguard Fiduciary Trust Co. | 0.12% | — | 2,733,760 | $474.2M |
| Wells Fargo & Company | 0.09% | Add +5.5% | 2,579,008 | $447.3M |
| BNP Paribas Financial Markets | 0.30% | Add +78.2% | 2,566,547 | $445.2M |
| Stifel Financial Corp. | 0.37% | Add +6.9% | 2,307,361 | $400.2M |
| Amundi | 0.11% | Reduce -31.7% | 2,298,833 | $398.7M |
| Parnassus Investments, LLC | 1.12% | Add +1.7% | 2,210,439 | $383.4M |
| Alliancebernstein L.P. | 0.12% | Add +7.7% | 1,981,282 | $367.6M |
| Dimensional Fund Advisors LP | 0.07% | Add +0.2% | 2,033,933 | $352.8M |
| W1M Asset Management Ltd | 3.82% | Add +6.5% | 2,023,752 | $350.9M |
| D. E. Shaw & Co. | 0.25% | Reduce -33.4% | 1,729,550 | $300.0M |
| Navera Investment Management Ltd. | 7.44% | Reduce -4.2% | 1,680,646 | $291.5M |
| Lazard Asset Management LLC | 0.46% | Reduce -5.0% | 1,623,755 | $281.6M |
| Manufacturers Life Insurance Company, The | 0.24% | Add +3.1% | 1,572,947 | $272.8M |
| Franklin Resources Inc. | 0.07% | Reduce -1.1% | 1,537,940 | $266.8M |
| Swiss National Bank | 0.14% | Add +6.6% | 1,437,800 | $249.4M |
| Barclays PLC | 0.09% | Reduce -6.0% | 1,375,355 | $238.6M |
| Rathbones Group PLC | 0.94% | Add +1.9% | 1,356,972 | $235.4M |
| CANADA LIFE ASSURANCE Co | 0.42% | Add +1.6% | 1,337,344 | $232.9M |
| First Trust Advisors LP | 0.17% | Add +4.9% | 1,332,401 | $231.1M |
| Nippon Life Insurance Co. | 4.46% | No change | 1,311,350 | $227.5M |
| Raymond James Financial Inc. | 0.07% | Add +20.8% | 1,228,062 | $213.0M |
| DekaBank Deutsche Girozentrale | 0.35% | No change | 1,193,291 | $211.8M |
| Polar Capital Holdings Plc | 0.92% | Add +26.4% | 1,220,000 | $211.6M |
| Jensen Investment Management Inc. | 3.94% | Add +6.2% | 1,151,204 | $199.7M |
| Envestnet Asset Management Inc. | 0.05% | Add +0.1% | 1,133,483 | $196.6M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.13% | Add +6.0% | 1,121,710 | $194.5M |
| California Public Employees Retirement System | 0.12% | Reduce -12.6% | 1,105,853 | $191.8M |
| Swedbank AB | 0.20% | Reduce -0.1% | 1,105,265 | $191.7M |
| Vanguard Global Advisers, LLC | 0.10% | — | 1,098,115 | $190.5M |
| Sumitomo Mitsui Trust Group, Inc. | 0.12% | Reduce -6.0% | 1,094,197 | $189.8M |
| Voloridge Investment Management, LLC | 0.76% | Reduce -36.4% | 1,091,938 | $189.4M |
| HSBC Holdings PLC | 0.10% | Reduce -13.5% | 985,680 | $171.4M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.15% | — | 980,335 | $170.0M |
| Storebrand Asset Management As | 0.47% | Reduce -1.3% | 942,473 | $163.5M |
| TD Asset Management Inc | 0.13% | Reduce -1.1% | 939,368 | $162.9M |
| Rhumbline Advisers | 0.13% | Add +64061.7% | 902,114 | $156.5M |
| FIL Ltd | 0.12% | Reduce -31.2% | 867,537 | $150.5M |
| Natixis Advisors, LLC | 0.20% | Reduce -1.6% | 849,616 | $147.4M |
| Acadian Asset Management LLC | 0.21% | Add +12.9% | 844,067 | $146.4M |
| Longview Partners (Guernsey) LTD | 1.99% | Reduce -59.8% | 810,308 | $140.5M |
| Canada Pension Plan Investment Board | 0.09% | Add +159.0% | 809,639 | $140.4M |
| Beutel, Goodman & Co Ltd. | 0.92% | New | 779,770 | $135.3M |
| Markel Group | 1.11% | Add +0.2% | 763,500 | $132.4M |
| Capital International, Inc. | 1.00% | Add +8.6% | 741,655 | $128.6M |
| California State Teachers Retirement System | 0.13% | Reduce -3.0% | 729,798 | $126.6M |
| Primecap Management Co. | 0.10% | Add +38.5% | 717,500 | $124.5M |
| Mackenzie Financial Corp. | 0.15% | Add +5.0% | 713,781 | $123.8M |
| Caisse de depot et placement du Quebec | 0.20% | Add +11.6% | 710,709 | $123.3M |
| Jones Financial Companies LLLP | 0.06% | Add +6793.2% | 723,789 | $122.4M |
| Two Sigma Investments, LP | 0.10% | Reduce -45.9% | 676,619 | $117.4M |
| SG Americas Securities, LLC | 0.12% | Add +483.8% | 644,704 | $111.8M |
| Epoch Investment Partners, Inc. | 0.68% | Reduce -10.2% | 644,170 | $111.7M |
| PNC Financial Services Group, Inc. | 0.06% | Reduce -0.8% | 643,360 | $111.6M |
| DAVENPORT & Co LLC | 0.61% | Add +23.6% | 634,227 | $110.2M |
| Assetmark, Inc. | 0.22% | Reduce -2.6% | 628,686 | $109.0M |
| Jupiter Asset Management Ltd. | 0.57% | New | 622,465 | $107.4M |
| Principal Financial Group Inc. | 0.06% | Add +0.9% | 610,447 | $105.9M |
| Robeco Institutional Asset Management B.V. | 0.15% | Add +102.3% | 605,301 | $105.0M |
| Marshall Wace, LLP | 0.11% | Add +490.7% | 605,053 | $104.9M |
| Prudential Financial Inc. | 0.13% | Add +37.4% | 601,893 | $104.4M |
| Cryder Capital Partners LLP | 6.68% | Add +23.4% | 589,456 | $102.2M |
| Mariner, LLC | 0.12% | Add +33.2% | 576,070 | $99.9M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.17% | Add +3.1% | 555,673 | $97.0M |
| New York State Common Retirement Fund | 0.13% | Reduce -3.8% | 549,823 | $95.4M |
| Quilter Plc | 1.61% | Add +15.8% | 529,206 | $91.8M |
"% of holder's portfolio" is MRSH's weight in each manager's 13F, not the share of Marsh & McLennan Cos the manager owns.