Marsh & McLennan Companies, Inc.
Ownership
Ownership Structure
Who owns Marsh & McLennan Companies, Inc. (MRSH)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.8% of the shares are freely tradable; institutional investors hold 95.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.32 | 39,502,046 | -6.1 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.63 | 31,472,575 | +0.0 | 06/30/2026 |
| State Street Corp | 4.72 | 22,401,676 | +1.5 | 06/30/2026 |
| Capital World Investors | 3.82 | 18,122,340 | +0.9 | 06/30/2026 |
| Wellington Management Company LLP | 3.57 | 16,975,238 | -2.3 | 06/30/2026 |
| Capital Research & Mgmt Co - Division 3 | 3.31 | 15,729,457 | +0.1 | 06/30/2026 |
| Geode Capital Management, LLC | 2.84 | 13,510,274 | +0.8 | 06/30/2026 |
| T. Rowe Price Associates, Inc. | 2.83 | 13,438,662 | +22.4 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| American Funds Washington Mutual A | 4.26 | 20,274,269 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.19 | 15,156,175 | -1.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Doyle John Q | President and CEO | 116,811 | 24,460,228 $ | Sep 2, 2026 | direct |
| Klisura Dean Michael | President & CEO, Marsh RE | 20,935 | 4,383,890 $ | Oct 23, 2026 | direct |
| South Martin | Chief Client Officer | 16,632 | 3,482,680 $ | Jul 28, 2026 | direct |
| Beswick Paul | SVP, Chief Information Officer | 16,376 | 3,429,134 $ | Jul 29, 2026 | direct |
| Brennan Katherine | SVP and General Counsel | 7,330 | 1,534,902 $ | Sep 2, 2026 | direct |
| Mills Steven A | Director | 5,952 | 1,246,296 $ | Aug 15, 2026 | direct |
| Tomlinson Patrick | Pres/CEO, Marsh People & Inv | 4,981 | 1,043,021 $ | Nov 2, 2026 | direct |
| Mills Stacy | Vice President and Controller | 2,705 | 566,448 $ | Oct 23, 2026 | direct |
| Broussard Bruce D | Director | 1,617 | 338,600 $ | Aug 15, 2026 | direct |
| Jones John Jude | Chief Marketing Officer | 1,478 | 309,493 $ | Aug 6, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Nov 2, 2026 | Tomlinson Patrick | Pres/CEO, Marsh People & Inv | Other | 1,775 | 203.47 | 361,159 |
| Nov 2, 2026 | Tomlinson Patrick | Pres/CEO, Marsh People & Inv | Other | 2,500 | 83.05 | 207,625 |
| Oct 23, 2026 | Klisura Dean Michael | President & CEO, Marsh RE | Sell | 4,194 | 200.00 | 838,800 |
| Oct 23, 2026 | Mills Stacy | Vice President and Controller | Sell | 1,215 | 200.00 | 243,000 |
| Sep 2, 2026 | Brennan Katherine | SVP and General Counsel | Sell | 1,197 | 187.90 | 224,915 |
| Sep 2, 2026 | Brennan Katherine | SVP and General Counsel | Other | 1,197 | 83.05 | 99,406 |
| Sep 2, 2026 | Doyle John Q | President and CEO | Sell | 16,656 | 188.51 | 3,139,823 |
| Sep 2, 2026 | Doyle John Q | President and CEO | Other | 16,656 | 73.20 | 1,219,136 |
| Aug 15, 2026 | Mills Steven A | Director | Other | 194 | 188.45 | 36,558 |
| Aug 15, 2026 | Broussard Bruce D | Director | Other | 192 | 188.45 | 36,181 |
| Aug 6, 2026 | Jones John Jude | Chief Marketing Officer | Sell | 6,500 | 191.96 | 1,247,723 |
| Jul 29, 2026 | Beswick Paul | SVP, Chief Information Officer | Sell | 713 | 198.00 | 141,174 |
| Jul 28, 2026 | South Martin | Chief Client Officer | Sell | 7,100 | 189.99 | 1,348,947 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 5, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.