Marsh & McLennan CosMRSH
13F holders, Q3 2025 (September 30)1,576holders −33
134new positions
151sold out
12famous investors
$201.46avg. 13F price*
At the end of Q3 2025, 1,576 institutions reported holding Marsh & McLennan Cos (MRSH) in their 13F filings, down 33 from Q2 2025. 134 opened new positions and 151 sold out. The largest holders were Vanguard Group Inc. ($9.3B), BlackRock, Inc. ($7.8B) and State Street Corp. ($4.3B). 12 famous investors held it, including Tom Gayner (1.2% of Markel Group's portfolio), David E. Shaw (0.4% of D. E. Shaw & Co.'s portfolio) and Jim Simons / Peter Brown (0.3% of Renaissance Technologies's portfolio).
- Company
- Marsh & McLennan Cos
- Sector
- Finance
- CUSIP
- 571748102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 134 | $313.4M |
| Exits | 151 | $406.1M |
All 13F filers, Q2 2025 → Q3 2025: 22,022,609 shares bought and 31,235,021 shares sold, net −9,212,412 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 1,576 holders
| Vanguard Group Inc. | 0.14% | Add +0.1% | 46,202,533 | $9.3B |
| BlackRock, Inc. | 0.14% | Reduce -3.7% | 38,785,634 | $7.8B |
| State Street Corp. | 0.15% | Add +0.5% | 21,538,014 | $4.3B |
| Capital International Investors | 0.61% | Add +1.2% | 18,590,697 | $3.7B |
| Capital World Investors | 0.49% | Add +0.5% | 17,702,898 | $3.6B |
| FMR LLC | 0.17% | Reduce -17.9% | 16,455,084 | $3.3B |
| Wellington Management Group LLP | 0.53% | Add +9.1% | 15,091,478 | $3.0B |
| Geode Capital Management, LLC | 0.17% | Add +2.2% | 12,967,908 | $2.6B |
| Capital Research Global Investors | 0.37% | Add +0.7% | 9,861,067 | $2.0B |
| Massachusetts Financial Services Co. | 0.59% | Reduce -2.1% | 9,474,359 | $1.9B |
| T. Rowe Price Associates Inc. | 0.18% | Reduce -16.9% | 8,349,764 | $1.7B |
| Morgan Stanley | 0.09% | Add +8.6% | 7,052,786 | $1.4B |
| Bank of America Corp. | 0.10% | Reduce -3.2% | 6,405,611 | $1.3B |
| Ameriprise Financial Inc. | 0.27% | Reduce -15.7% | 5,767,988 | $1.2B |
| Northern Trust Corp. | 0.14% | Reduce -1.8% | 5,623,907 | $1.1B |
| Goldman Sachs Group Inc. | 0.15% | Add +13.5% | 5,221,331 | $1.1B |
| JPMorgan Chase & Co. | 0.06% | Add +9.5% | 4,872,982 | $982.1M |
| Mawer Investment Management Ltd. | 4.79% | Reduce -14.9% | 4,572,623 | $921.5M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.20% | Reduce -20.4% | 4,543,833 | $915.7M |
| Clearbridge Investments, LLC | 0.69% | Add +76.2% | 4,517,111 | $910.3M |
| UBS Group AG | 0.17% | Reduce -6.3% | 4,255,370 | $857.6M |
| Nuveen, LLC | 0.21% | Reduce -6.5% | 3,850,181 | $775.9M |
| Artisan Partners Limited Partnership | 1.00% | Reduce -0.2% | 3,437,011 | $692.7M |
| Invesco Ltd. | 0.10% | Add +29.7% | 3,293,188 | $663.7M |
| Deutsche Bank AG | 0.22% | Add +4.3% | 3,288,422 | $662.7M |
| Legal & General Group Plc | 0.14% | Add +1.3% | 3,196,714 | $644.2M |
| Bank of New York Mellon Corp | 0.11% | Reduce -0.4% | 3,065,069 | $617.7M |
| Charles Schwab Investment Management Inc. | 0.09% | Add +0.1% | 2,905,513 | $585.5M |
| Lazard Asset Management LLC | 0.75% | Add +6.5% | 2,763,189 | $556.9M |
| Wells Fargo & Company | 0.11% | Reduce -25.1% | 2,668,112 | $537.7M |
| Parnassus Investments, LLC | 1.20% | Reduce -2.7% | 2,586,704 | $521.3M |
| D. E. Shaw & Co. | 0.45% | Add +113.9% | 2,576,666 | $519.3M |
| Jensen Investment Management Inc. | 6.02% | Reduce -0.7% | 2,406,645 | $485.0M |
| Stifel Financial Corp. | 0.42% | Add +1.8% | 2,294,938 | $462.5M |
| Royal Bank of Canada | 0.08% | Reduce -20.0% | 2,256,873 | $454.8M |
| Barclays PLC | 0.17% | Add +41.7% | 2,202,372 | $443.8M |
| Mackenzie Financial Corp. | 0.51% | Reduce -8.0% | 2,102,286 | $423.7M |
| Longview Partners (Guernsey) LTD | 4.40% | Reduce -7.9% | 2,088,995 | $421.0M |
| Dimensional Fund Advisors LP | 0.09% | Add +0.1% | 2,023,475 | $407.8M |
| Bahl & Gaynor LLC | 1.85% | Reduce -4.5% | 1,846,515 | $372.1M |
| Primecap Management Co. | 0.28% | Reduce -7.2% | 1,821,016 | $367.0M |
| Ako Capital LLP | 5.16% | Add +1.0% | 1,799,753 | $362.7M |
| Janus Henderson Group PLC | 0.16% | Reduce -8.8% | 1,690,699 | $340.7M |
| Navera Investment Management Ltd. | 6.27% | Add +7.0% | 1,623,960 | $327.3M |
| W1M Investment Management Ltd | 4.05% | Add +20.8% | 1,560,628 | $314.6M |
| Franklin Resources Inc. | 0.08% | Add +1.9% | 1,549,969 | $312.4M |
| California Public Employees Retirement System | 0.18% | Reduce -16.9% | 1,514,767 | $305.3M |
| Amundi | 0.10% | Reduce -48.9% | 1,478,297 | $297.6M |
| Robeco Institutional Asset Management B.V. | 0.43% | Reduce -21.8% | 1,476,821 | $297.6M |
| Swiss National Bank | 0.17% | Reduce -4.8% | 1,420,300 | $286.2M |
| Arrowstreet Capital, Limited Partnership | 0.18% | Add +654.7% | 1,419,104 | $286.0M |
| CANADA LIFE ASSURANCE Co | 0.40% | Add +17.7% | 1,396,745 | $279.4M |
| FIL Ltd | 0.22% | Add +14.9% | 1,384,659 | $279.1M |
| Voloridge Investment Management, LLC | 0.93% | Add +93.4% | 1,379,436 | $278.0M |
| Ninety One UK Ltd | 0.59% | Reduce -46.7% | 1,346,803 | $271.4M |
| BNP Paribas Financial Markets | 0.21% | Add +160.2% | 1,319,258 | $265.9M |
| Nippon Life Insurance Co. | 4.45% | Reduce -50.0% | 1,311,350 | $264.3M |
| Two Sigma Advisers, LP | 0.53% | Add +204.3% | 1,309,700 | $263.9M |
| Envestnet Asset Management Inc. | 0.08% | Add +2.1% | 1,296,472 | $261.3M |
| Qube Research & Technologies Ltd | 0.36% | Reduce -0.4% | 1,277,357 | $257.4M |
| Rathbones Group PLC | 1.03% | Add +27.6% | 1,264,247 | $254.8M |
| American Century Companies Inc. | 0.13% | Add +14.1% | 1,260,479 | $254.0M |
| Sumitomo Mitsui Trust Group, Inc. | 0.14% | Add +2.3% | 1,217,043 | $245.3M |
| Alliancebernstein L.P. | 0.08% | Reduce -6.9% | 1,191,361 | $240.1M |
| DekaBank Deutsche Girozentrale | 0.40% | No change | 1,193,291 | $237.4M |
| First Trust Advisors LP | 0.17% | Reduce -1.3% | 1,157,404 | $233.3M |
| Renaissance Technologies | 0.30% | Add +15.0% | 1,120,300 | $225.8M |
| Two Sigma Investments, LP | 0.36% | Add +10.8% | 1,100,141 | $221.7M |
| Swedbank AB | 0.22% | Add +21.9% | 1,093,014 | $220.3M |
| HSBC Holdings PLC | 0.13% | Reduce -11.8% | 1,084,774 | $218.4M |
| Findlay Park Partners LLP | 2.26% | Add +20.3% | 1,065,967 | $214.8M |
| Raymond James Financial Inc. | 0.07% | Add +12.3% | 1,042,536 | $210.1M |
| National Pension Service | 0.16% | Add +2.2% | 1,037,834 | $209.2M |
| AQR Capital Management | 0.13% | Add +139.9% | 1,032,461 | $206.8M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.15% | Add +4.7% | 1,002,026 | $201.9M |
| TD Asset Management Inc | 0.16% | Add +6.1% | 981,977 | $197.9M |
| Storebrand Asset Management As | 0.52% | Add +13.2% | 979,801 | $197.5M |
| Rhumbline Advisers | 0.15% | Reduce -1.6% | 932,537 | $187.9M |
| Aviva PLC | 0.34% | Reduce -14.1% | 927,765 | $187.0M |
| Sarasin & Partners LLP | 1.82% | Add +65.6% | 926,449 | $185.5M |
| Polar Capital Holdings Plc | 0.89% | No change | 910,000 | $183.4M |
| Natixis Advisors, LLC | 0.23% | Reduce -2.5% | 789,444 | $159.1M |
| California State Teachers Retirement System | 0.16% | Reduce -0.2% | 788,869 | $159.0M |
| Principal Financial Group Inc. | 0.08% | Reduce -4.2% | 777,177 | $156.6M |
| Markel Group | 1.23% | Add +0.8% | 755,000 | $152.2M |
| Manufacturers Life Insurance Company, The | 0.12% | Reduce -45.1% | 735,731 | $148.3M |
| Assetmark, Inc. | 0.30% | Add +0.6% | 688,583 | $138.8M |
| Epoch Investment Partners, Inc. | 0.75% | Add +7.9% | 680,915 | $137.2M |
| PNC Financial Services Group, Inc. | 0.08% | Add +12.3% | 671,907 | $135.4M |
| Capital International, Inc. | 1.08% | Add +20.7% | 667,621 | $134.5M |
| CCLA Investment Management | 2.12% | Add +2.4% | 656,634 | $132.3M |
| Acadian Asset Management LLC | 0.22% | Reduce -2.0% | 629,480 | $126.8M |
| Lord, Abbett & Co. LLC | 0.38% | No change | 600,223 | $121.0M |
| Jennison Associates LLC | 0.07% | Reduce -42.9% | 600,013 | $120.9M |
| Macquarie Group Ltd. | 0.14% | Add +251.8% | 592,509 | $119.4M |
| New York State Common Retirement Fund | 0.15% | Reduce -6.3% | 587,070 | $118.3M |
| Nordea Investment Management AB | 0.10% | Reduce -12.9% | 572,964 | $114.9M |
| Prudential Financial Inc. | 0.14% | Add +1.9% | 567,777 | $114.4M |
| Bank of Montreal | 0.05% | Add +0.1% | 567,330 | $114.3M |
| Pictet Asset Management Holding SA | 0.11% | Add +5.2% | 558,002 | $112.5M |
"% of holder's portfolio" is MRSH's weight in each manager's 13F, not the share of Marsh & McLennan Cos the manager owns.