MMC Institutional Ownership & Shareholders
MARSH & MCLENNAN COS (MMC) is currently held by 1,490 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $71.27B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MMC tracked by InsiderSet, reporting ownership valued at approximately $6.58B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $7.22B, representing an estimated gain of +9.62% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% 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
1,490
Total Reported Value
$71.27B
Largest Holder
Blackrock, Inc.
Largest Position
$6.58B
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
26
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.10% | 39,502,046 | $6,583,805,966 | $7,217,023,804 | +$633,217,838 | +9.62% | |
| Vanguard Capital Management Llc | 0.11% | 31,472,575 | $5,245,534,076 | $5,750,039,453 | +$504,505,377 | +9.62% | |
| State Street Corp | 0.11% | 22,401,676 | $3,733,687,339 | $4,092,786,205 | +$359,098,866 | +9.62% | |
| Capital World Investors | 0.36% | 18,122,340 | $3,020,458,543 | $3,310,951,518 | +$290,492,975 | +9.62% | |
| Wellington Management Group Llp | 0.49% | 16,975,238 | $2,829,262,918 | $3,101,375,983 | +$272,113,065 | +9.62% | |
| Capital International Investors | 0.54% | 15,729,457 | $2,621,642,741 | $2,873,771,794 | +$252,129,053 | +9.62% | |
| Geode Capital Management, Llc | 0.12% | 13,510,274 | $2,250,034,870 | $2,468,327,060 | +$218,292,190 | +9.70% | |
| Price T Rowe Associates Inc | 0.22% | 13,438,662 | $2,239,823,000 | $2,455,243,547 | +$215,420,547 | +9.62% | |
| Vanguard Portfolio Management Llc | 0.09% | 12,570,512 | $2,095,127,235 | $2,296,632,542 | +$201,505,307 | +9.62% | |
| Capital Research Global Investors | 0.26% | 10,973,649 | $1,828,982,920 | $2,004,885,672 | +$175,902,752 | +9.62% | |
| Harris Associates L P | 1.93% | 8,687,496 | $1,447,944,972 | $1,587,205,519 | +$139,260,547 | +9.62% | |
| Artisan Partners Limited Partnership | 1.98% | 7,269,246 | $1,211,565,231 | $1,328,091,244 | +$116,526,013 | +9.62% | |
| Fmr Llc | 0.05% | 6,954,123 | $1,159,043,452 | $1,270,518,272 | +$111,474,820 | +9.62% | |
| Massachusetts Financial Services Co | 0.35% | 6,507,415 | $1,088,671,762 | $1,188,904,721 | +$100,232,959 | +9.21% | |
| Morgan Stanley | 0.06% | 6,314,085 | $1,052,368,885 | $1,153,583,330 | +$101,214,445 | +9.62% | |
| Norges Bank | 0.10% | 6,255,525 | $1,042,608,352 | $1,142,884,418 | +$100,276,066 | +9.62% | |
| Ameriprise Financial Inc | 0.19% | 5,535,138 | $922,146,161 | $1,011,269,713 | +$89,123,552 | +9.66% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.19% | 5,182,517 | $898,907,573 | $946,845,856 | +$47,938,283 | +5.33% | |
| Northern Trust Corp | 0.09% | 4,888,165 | $814,710,461 | $893,067,746 | +$78,357,285 | +9.62% | |
| Jpmorgan Chase & Co | 0.05% | 4,730,329 | $788,593,335 | $864,231,108 | +$75,637,773 | +9.59% | |
| Clearbridge Investments, Llc | 0.65% | 4,705,966 | $784,316,723 | $859,779,988 | +$75,463,265 | +9.62% | |
| Invesco Ltd. | 0.06% | 4,305,773 | $717,643,133 | $786,664,727 | +$69,021,594 | +9.62% | |
| Goldman Sachs Group Inc | 0.07% | 4,228,626 | $704,785,161 | $772,569,970 | +$67,784,809 | +9.62% | |
| Arrowstreet Capital, Limited Partnership | 0.31% | 4,170,110 | $695,032,234 | $761,879,097 | +$66,846,863 | +9.62% | |
| Deutsche Bank Ag\ | 0.20% | 4,113,644 | $685,621,045 | $751,562,759 | +$65,941,714 | +9.62% | |
| Ninety One Uk Ltd | 1.48% | 3,971,522 | $661,933,438 | $725,597,069 | +$63,663,631 | +9.62% | |
| American Century Companies Inc | 0.29% | 3,877,741 | $646,303,466 | $708,463,281 | +$62,159,815 | +9.62% | |
| Edgepoint Investment Group Inc. | 4.81% | 3,820,196 | $636,712,067 | $697,949,809 | +$61,237,742 | +9.62% | |
| Ubs Group Ag | 0.10% | 3,603,522 | $600,599,012 | $658,363,469 | +$57,764,457 | +9.62% | |
| Bank Of America Corp | 0.04% | 3,455,003 | $575,845,418 | $631,229,048 | +$55,383,630 | +9.62% | |
| Nuveen, Llc | 0.14% | 3,451,900 | $575,328,128 | $630,662,130 | +$55,334,002 | +9.62% | |
| Bank Of New York Mellon Corp | 0.09% | 3,194,567 | $532,438,389 | $583,647,391 | +$51,209,002 | +9.62% | |
| Charles Schwab Investment Management Inc | 0.07% | 3,072,405 | $512,077,741 | $561,328,394 | +$49,250,653 | +9.62% | |
| Royal Bank Of Canada | 0.08% | 2,813,877 | $468,988,000 | $514,095,328 | +$45,107,328 | +9.62% | |
| Legal & General Group Plc | 0.10% | 2,793,483 | $465,589,819 | $510,369,344 | +$44,779,525 | +9.62% | |
| Vanguard Fiduciary Trust Co | 0.10% | 2,705,812 | $450,977,686 | $494,351,852 | +$43,374,166 | +9.62% | |
| Aqr Capital Management Llc | 0.15% | 2,607,451 | $432,106,876 | $476,381,298 | +$44,274,422 | +10.25% | |
| Wells Fargo & Company/Mn | 0.07% | 2,510,228 | $418,379,686 | $458,618,656 | +$40,238,970 | +9.62% | |
| Stifel Financial Corp | 0.31% | 2,212,398 | $368,740,170 | $404,205,115 | +$35,464,945 | +9.62% | |
| Alliancebernstein L.P. | 0.12% | 2,061,247 | $357,523,292 | $376,589,827 | +$19,066,535 | +5.33% | |
| Primecap Management Co/Ca/ | 0.21% | 2,145,025 | $357,511,318 | $391,896,068 | +$34,384,750 | +9.62% | |
| London & Capital Asset Management Ltd | 3.19% | 2,090,489 | $348,202,306 | $381,932,340 | +$33,730,034 | +9.69% | |
| Dimensional Fund Advisors Lp | 0.06% | 2,022,672 | $337,121,184 | $369,542,174 | +$32,420,990 | +9.62% | |
| Mawer Investment Management Ltd. | 2.12% | 1,871,159 | $311,866,071 | $341,860,749 | +$29,994,678 | +9.62% | |
| Manufacturers Life Insurance Company, The | 0.24% | 1,867,077 | $311,185,724 | $341,114,968 | +$29,929,244 | +9.62% | |
| Rathbones Group Plc | 1.06% | 1,733,034 | $288,844,776 | $316,625,312 | +$27,780,536 | +9.62% | |
| Canada Pension Plan Investment Board | 0.15% | 1,605,850 | $267,647,020 | $293,388,795 | +$25,741,775 | +9.62% | |
| Beutel, Goodman & Co Ltd. | 1.93% | 1,573,890 | $262,320,000 | $287,549,703 | +$25,229,703 | +9.62% | |
| Lazard Asset Management Llc | 0.38% | 1,516,945 | $252,829,178 | $277,145,852 | +$24,316,674 | +9.62% | |
| Navera Investment Management Ltd. | 6.78% | 1,517,459 | $252,810,851 | $277,239,759 | +$24,428,908 | +9.66% |
Frequently asked questions about MMC
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Who are the largest institutional holders of MMC?
The largest institutional holders of MMC reported in the latest SEC Form 13F filings include Blackrock, Inc. , Vanguard Capital Management Llc , State Street Corp , Capital World Investors , and Wellington Management Group Llp . InsiderSet ranks institutional holders by their latest reported MMC position.
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What is MMC institutional ownership?
This page tracks MMC positions reported by institutional investment managers through SEC Form 13F. MARSH & MCLENNAN COS (MMC) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
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How many institutions own MMC?
InsiderSet currently tracks 1,490 institutional managers reporting MMC holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of MMC shareholders.
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How much MMC stock do institutions own?
Institutional investment managers disclosed approximately $71.27B in MMC holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
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When was MMC institutional ownership last updated?
The latest MMC institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
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Are institutional MMC holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its MMC position after the reporting date.
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Are institutions buying or selling MMC?
Institutional buying and selling can be analyzed by comparing MMC positions across consecutive 13F reporting periods. InsiderSet's MMC Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View MMC ownership changes.
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How has MMC institutional ownership changed over time?
InsiderSet tracks MMC institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.