Marsh & McLennan Companies
MRSH · NYSE
Who owns MRSH
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 37.6% of MRSH’s shares.
- Vanguard Capital Management, LLC6.6%
- BlackRock Institutional Trust Company, N.A.5.3%
- State Street Investment Management (US)4.7%
- Capital World Investors3.8%
- Next 6 largest institutions17.2%
- All other shareholders62.4%
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Capital Management, LLC | 31.47M | 6.60% |
| BlackRock Institutional Trust Company, N.A. | 25.16M | 5.27% |
| State Street Investment Management (US) | 22.40M | 4.69% |
| Capital World Investors | 18.12M | 3.80% |
| Wellington Management Company, LLP | 16.98M | 3.56% |
| Capital International Investors | 15.73M | 3.30% |
| Geode Capital Management, L.L.C. | 13.51M | 2.83% |
| Vanguard Portfolio Management, LLC | 12.57M | 2.63% |
| T. Rowe Price Associates, Inc. | 12.56M | 2.63% |
| Capital Research Global Investors | 10.97M | 2.30% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| American Funds Washington Mutual Investors Fund | 20.27M | 4.25% |
| Vanguard Total Stock Market Index Fund | 15.34M | 3.22% |
| Vanguard 500 Index Fund | 12.65M | 2.65% |
| iShares Core S&P 500 ETF | 6.43M | 1.35% |
| Fidelity 500 Index Fund | 6.23M | 1.31% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $10.90M (7 trades) of MRSH on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Brennan Katherine | Option exercise | 1.20K | — |
| Brennan Katherine | Sale | 1.20K | $224.92K |
| Brennan Katherine | Option exercise | 1.20K | $99.41K |
| Doyle John Q | Option exercise | 16.66K | — |
| Doyle John Q | Sale | 16.66K | $3.14M |
| Doyle John Q | Option exercise | 16.66K | $1.22M |
| Lute Jane H | Award | 144 | $27.14K |
| Yates Lloyd M | Award | 224 | $42.21K |
| SCHAPIRO MORTON O | Award | 219 | $41.27K |
| BROUSSARD BRUCE D | Award | 192 | $36.18K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Kevin HernHouse | Sale | $50K–$100K | Sep 23, 2026 |
| Kevin HernHouse | Sale | $50K–$100K | Sep 17, 2026 |
| Kevin HernHouse | Sale | $1K–$15K | Sep 14, 2026 |
| Kevin HernHouse | Sale | $100K–$250K | Sep 9, 2026 |
| Kevin HernHouse | Sale | $1K–$15K | Sep 2, 2026 |
| Ro KhannaHouse | Purchase | $1K–$15K | Apr 13, 2026 |
| Alan ArmstrongSenator | Sale (Full) | $1K–$15K | Mar 27, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 6.35M
- Days to cover
- 1.87
- % of shares outstanding
- 1.33%
- Average daily volume
- 3.40M
- Change since last report
- +8.2%
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