MARSH & MCLENNAN COS (MMC) Institutional Shareholders
MARSH & MCLENNAN COS (MMC) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $71.58B in MMC holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MMC tracked by InsiderSet, reporting ownership valued at approximately $7.30B in its March 31, 2026 SEC Form 13F filing.
The top 10 institutional shareholders tracked on this page collectively account for approximately 47% of the total disclosed MMC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, State Street Corp, and several other long-term asset managers with concentrated positions in MARSH & MCLENNAN COS (MMC).
This page ranks the largest institutional MMC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,479
Total Reported Value
$71.58B
Largest Holder
Blackrock, Inc.
Largest Position
$7.30B
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
32
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.13% | 42,061,676 | $7,295,597,844 | — | — | — | |
| Vanguard Capital Management Llc | 0.14% | 31,467,674 | $5,458,068,056 | — | — | — | |
| State Street Corp | 0.13% | 22,070,945 | $3,828,205,410 | — | — | — | |
| Capital World Investors | 0.43% | 17,969,182 | $3,117,023,568 | — | — | — | |
| Wellington Management Group Llp | 0.56% | 17,370,709 | $3,012,949,476 | — | — | — | |
| Capital International Investors | 0.64% | 15,713,853 | $2,726,030,115 | — | — | — | |
| Geode Capital Management, Llc | 0.14% | 13,404,172 | $2,322,230,689 | — | — | — | |
| Vanguard Portfolio Management Llc | 0.11% | 12,427,946 | $2,155,627,234 | — | — | — | |
| Capital Research Global Investors | 0.30% | 11,301,188 | $1,960,349,747 | — | — | — | |
| Fmr Llc | 0.09% | 10,180,705 | $1,765,843,388 | — | — | — | |
| Massachusetts Financial Services Co | 0.48% | 8,200,309 | $1,422,326,336 | — | — | — | |
| Morgan Stanley | 0.07% | 6,473,992 | $1,122,914,561 | — | — | — | |
| Clearbridge Investments, Llc | 0.97% | 6,423,531 | $1,114,141,193 | — | — | — | |
| Ameriprise Financial Inc | 0.22% | 5,488,537 | $951,609,190 | — | — | — | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.19% | 5,182,517 | $898,907,573 | — | — | — | |
| Harris Associates L P | 1.20% | 5,169,119 | $896,583,647 | — | — | — | |
| Storebrand Asset Management As | 0.30% | 5,617,268 | $892,780,217 | — | — | — | |
| Northern Trust Corp | 0.11% | 4,965,079 | $861,192,952 | — | — | — | |
| Bank Of America Corp | 0.06% | 4,939,614 | $856,775,985 | — | — | — | |
| Artisan Partners Limited Partnership | 1.38% | 4,875,857 | $845,717,397 | — | — | — | |
| Ubs Group Ag | 0.15% | 4,721,091 | $818,873,234 | — | — | — | |
| American Century Companies Inc | 0.38% | 4,234,327 | $734,444,323 | — | — | — | |
| Nuveen, Llc | 0.20% | 4,167,487 | $722,850,575 | — | — | — | |
| Invesco Ltd. | 0.10% | 3,884,778 | $673,814,726 | — | — | — | |
| Ninety One Uk Ltd | 1.48% | 3,971,522 | $661,933,438 | — | — | — | |
| Deutsche Bank Ag\ | 0.21% | 3,704,174 | $642,488,978 | — | — | — | |
| Aqr Capital Management Llc | 0.29% | 3,673,987 | $637,253,136 | — | — | — | |
| Goldman Sachs Group Inc | 0.08% | 3,672,959 | $637,074,780 | — | — | — | |
| Mawer Investment Management Ltd. | 3.90% | 3,475,590 | $602,841,086 | — | — | — | |
| Arrowstreet Capital, Limited Partnership | 0.32% | 3,454,586 | $599,197,942 | — | — | — | |
| Royal Bank Of Canada | 0.11% | 3,316,579 | $575,261,000 | — | — | — | |
| Bank Of New York Mellon Corp | 0.10% | 3,254,021 | $564,409,795 | — | — | — | |
| Legal & General Group Plc | 0.12% | 3,066,184 | $531,829,611 | — | — | — | |
| Charles Schwab Investment Management Inc | 0.08% | 3,033,148 | $526,099,521 | — | — | — | |
| Vanguard Fiduciary Trust Co | 0.12% | 2,733,760 | $474,170,672 | — | — | — | |
| Wells Fargo & Company/Mn | 0.09% | 2,579,008 | $447,328,683 | — | — | — | |
| Bnp Paribas Financial Markets | 0.29% | 2,566,547 | $445,167,577 | — | — | — | |
| Stifel Financial Corp | 0.37% | 2,307,361 | $400,214,577 | — | — | — | |
| Amundi | 0.11% | 2,298,833 | $398,732,583 | — | — | — | |
| Alliancebernstein L.P. | 0.12% | 1,981,282 | $367,567,437 | — | — | — | |
| Dimensional Fund Advisors Lp | 0.07% | 2,033,933 | $352,820,406 | — | — | — | |
| London & Capital Asset Management Ltd | 3.82% | 2,023,752 | $350,948,959 | — | — | — | |
| Parnassus Endeavor Fund | Parnassus Investments | 0.91% | 2,047,623 | $341,277,325 | — | — | — |
| D. E. Shaw & Co., Inc. | 0.24% | 1,729,550 | $299,990,448 | — | — | — | |
| Navera Investment Management Ltd. | 7.44% | 1,680,646 | $291,470,117 | — | — | — | |
| Rathbones Group Plc | 1.06% | 1,733,034 | $288,844,776 | — | — | — | |
| Lazard Asset Management Llc | 0.46% | 1,623,755 | $281,640,288 | — | — | — | |
| Manufacturers Life Insurance Company, The | 0.23% | 1,572,947 | $272,827,657 | — | — | — | |
| Franklin Resources Inc | 0.07% | 1,537,940 | $266,755,693 | — | — | — | |
| Swiss National Bank | 0.14% | 1,437,800 | $249,386,410 | — | — | — |
Frequently asked questions about MMC
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Who owns the most MMC stock?
The largest holders of MMC are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MARSH & MCLENNAN COS (MMC).
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Is MMC widely held by superinvestors?
Many widely followed stocks like MMC appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MMC is represented among the institutional managers we track.
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What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.