Marsh & McLennan Companies, Inc. (MRSH) Ownership
MRSH ownership summary
as of October 18, 2026- Institutions
- 94.8% of shares outstanding
- Insiders
- 0.08% of shares outstanding
- Shares outstanding
- 477.2M
- Float
- 474.1M shares available to trade
- Short interest
- 1.34% 6.3M shares short
- Days to cover
- 2.29 short interest down 4.1% vs prior month
- Institutions 94.84%
- Insiders 0.08%
- Other investors 5.08%
MRSH top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 8.28% | 39.5M | $7.44B | −2.6M (−6.1%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 6.60% | 31.5M | $5.93B | +4,901 (+0.0%) | June 30, 2026 |
| 3 | State Street Corp | 4.69% | 22.4M | $4.22B | +330,731 (+1.5%) | June 30, 2026 |
| 4 | Capital World Investors | 3.80% | 18.1M | $3.41B | +153,158 (+0.9%) | June 30, 2026 |
| 5 | Wellington Management Company LLP | 3.56% | 17.0M | $3.20B | −395,471 (−2.3%) | June 30, 2026 |
| 6 | Capital Research & Mgmt Co - Division 3 | 3.30% | 15.7M | $2.96B | +15,604 (+0.1%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.83% | 13.5M | $2.54B | +106,102 (+0.8%) | June 30, 2026 |
| 8 | T. Rowe Price Associates, Inc. | 2.82% | 13.4M | $2.53B | +2.5M (+22.4%) | June 30, 2026 |
| 9 | Vanguard Portfolio Management, LLC | 2.63% | 12.6M | $2.37B | +142,566 (+1.1%) | June 30, 2026 |
| 10 | Capital Research Global Investors | 2.30% | 11.0M | $2.07B | −327,539 (−2.9%) | June 30, 2026 |
| 11 | Harris Associates L.P. | 1.82% | 8.7M | $1.64B | +3.5M (+68.1%) | June 30, 2026 |
| 12 | Artisan Partners Limited Partnership | 1.52% | 7.3M | $1.37B | +2.4M (+49.1%) | June 30, 2026 |
| 13 | FMR Inc | 1.46% | 7.0M | $1.31B | −3.2M (−31.7%) | June 30, 2026 |
| 14 | Massachusetts Financial Services Company | 1.36% | 6.5M | $1.23B | −1.7M (−20.6%) | June 30, 2026 |
| 15 | Morgan Stanley - Brokerage Accounts | 1.32% | 6.3M | $1.19B | −159,907 (−2.5%) | June 30, 2026 |
| 16 | NORGES BANK | 1.31% | 6.3M | $1.18B | −2.1M (−25.4%) | June 30, 2026 |
| 17 | Ameriprise Financial Inc | 1.16% | 5.5M | $1.04B | +46,601 (+0.8%) | June 30, 2026 |
| 18 | Northern Trust Corp | 1.02% | 4.9M | $920.7M | −76,914 (−1.5%) | June 30, 2026 |
| 19 | JPMorgan Chase & Co | 0.99% | 4.7M | $891.0M | −1.4M (−22.4%) | June 30, 2026 |
| 20 | ClearBridge Advisors, LLC | 0.99% | 4.7M | $886.4M | −1.7M (−26.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 9.2M shares and 10 cut 13.7M.
MRSH top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | American Funds Washington Mutual A | 4.25% | 20.3M | $3.82B | +240,703 (+1.2%) | June 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 3.21% | 15.3M | $2.88B | −29,073 (−0.2%) | August 31, 2026 |
| 3 | Vanguard 500 Index Investor | 2.68% | 12.8M | $2.41B | +151,424 (+1.2%) | August 31, 2026 |
| 4 | iShares Core S&P 500 ETF | 1.33% | 6.4M | $1.20B | −10,249 (−0.2%) | September 30, 2026 |
| 5 | Fidelity 500 Index | 1.31% | 6.3M | $1.18B | +24,035 (+0.4%) | August 31, 2026 |
| 6 | State Street® SPDR® S&P 500® ETF | 1.23% | 5.9M | $1.10B | — | September 30, 2026 |
| 7 | Vanguard Dividend Growth Inv | 1.01% | 4.8M | $907.4M | +427,524 (+9.7%) | June 30, 2026 |
| 8 | Vanguard MStar Value Index Investor | 0.97% | 4.6M | $867.7M | +17,878 (+0.4%) | August 31, 2026 |
| 9 | American Funds Fundamental Invs A | 0.87% | 4.2M | $781.7M | +602,054 (+17.0%) | June 30, 2026 |
| 10 | Vanguard Equity-Income Inv | 0.85% | 4.1M | $767.8M | +4,106 (+0.1%) | June 30, 2026 |
| 11 | MFS Value A | 0.83% | 4.0M | $749.7M | −308,257 (−7.2%) | August 31, 2026 |
| 12 | American Funds Invmt Co of Amer A | 0.79% | 3.8M | $713.4M | — | June 30, 2026 |
| 13 | State Street®FinSelSectSPDR®ETF | 0.68% | 3.2M | $608.3M | −20,449 (−0.6%) | September 30, 2026 |
| 14 | Oakmark Select Investor | 0.59% | 2.8M | $531.4M | +1.3M (+84.9%) | June 30, 2026 |
| 15 | American Funds American Balanced A | 0.59% | 2.8M | $529.8M | −194,772 (−6.5%) | June 30, 2026 |
| 16 | Vanguard Dividend Appreciation ETF | 0.57% | 2.7M | $513.7M | +1,307 (+0.0%) | August 31, 2026 |
| 17 | American Funds American Mutual A | 0.56% | 2.7M | $507.6M | — | June 30, 2026 |
| 18 | Vanguard Institutional Index I | 0.54% | 2.6M | $485.1M | −23,989 (−0.9%) | August 31, 2026 |
| 19 | Columbia Dividend Income Inst | 0.52% | 2.5M | $468.8M | −4,674 (−0.2%) | August 31, 2026 |
| 20 | Ninety One GSF Glb Frchs I Acc USD | 0.50% | 2.4M | $445.7M | −60,963 (−2.5%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
MRSH insider transactions
latest 14| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-30 | Ro Khanna | Sell | $174.61 | — | — |
| 2026-03-23 | Ro Khanna | Sell | $173.86 | — | — |
| 2026-03-04 | John Q Doyle | Sell | $183.30 | 16,655 | $3.1M |
| 2026-02-17 | Ro Khanna | Buy | $175.83 | — | — |
| 2026-01-29 | Ro Khanna | Sell | — | — | — |
| 2026-01-23 | Ro Khanna | Buy | — | — | — |
| 2026-01-13 | Ro Khanna | Buy | — | — | — |
| 2025-12-01 | John Q Doyle | Sell | $182.22 | 21,079 | $3.8M |
| 2025-11-10 | Ro Khanna | Sell | — | — | — |
| 2025-11-03 | Ro Khanna | Buy | — | — | — |
| 2025-10-07 | Ro Khanna | Buy | — | — | — |
| 2025-09-29 | Ro Khanna | Buy | — | — | — |
| 2025-09-23 | Val T. Hoyle | Sell | — | — | — |
| 2025-09-02 | John Q Doyle | Sell | $205.65 | 21,079 | $4.3M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
MRSH shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns MRSH
Institutional investors own 94.8% of Marsh McLennan's shares and insiders 0.08%. The largest holder is BlackRock Inc with 8.28% of the shares (39.5M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 10 reduced their stake in the latest filings. Short interest is 1.34% of the float, or 2.29 days of average trading volume. The share count fell 10.6% since 2014.
Related: MRSH analyst forecast, MRSH key metrics, MRSH dividend history. See the MRSH stock overview for the latest quote and news.
MRSH ownership FAQ
Who owns the most Marsh McLennan stock?
The largest shareholders of Marsh McLennan are BlackRock Inc (8.28%), Vanguard Capital Management, LLC (6.60%), State Street Corp (4.69%), Capital World Investors (3.80%), Wellington Management Company LLP (3.56%).
What percentage of Marsh McLennan is owned by institutions?
Institutions hold 94.8% of Marsh McLennan's shares outstanding; insiders hold 0.08%.
Which funds own Marsh McLennan?
The largest fund holders of Marsh McLennan are American Funds Washington Mutual A (4.25%), Vanguard MStar Total Stk Mkt Idx Invest (3.21%), Vanguard 500 Index Investor (2.68%), iShares Core S&P 500 ETF (1.33%), Fidelity 500 Index (1.31%).
What is Marsh McLennan's short interest?
6.3M shares of Marsh McLennan were sold short, 1.34% of the float; at the average daily volume it would take 2.29 days to cover.
Are insiders buying or selling Marsh McLennan?
Of the latest 14 reported insider transactions in Marsh McLennan (since September 2, 2025), 6 were purchases and 8 were sales.
How many shares of Marsh McLennan are outstanding?
Marsh McLennan has 477.2M shares outstanding, of which 474.1M are in the public float.