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 | 8.81 | 42,061,676 | +4.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.59 | 31,467,674 | +0.0 | 03/31/2026 |
| State Street Corp | 4.63 | 22,070,945 | +0.9 | 03/31/2026 |
| Capital World Investors | 3.80 | 18,122,340 | +0.9 | 06/30/2026 |
| Wellington Management Company LLP | 3.56 | 16,975,238 | -2.3 | 06/30/2026 |
| Capital Research & Mgmt Co - Division 3 | 3.30 | 15,729,457 | +0.1 | 06/30/2026 |
| Geode Capital Management, LLC | 2.81 | 13,404,172 | +15.1 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Capital Group Wash Mutual Invtrs Comp | 4.25 | 20,274,269 | +1.2 | 06/30/2026 |
| American Funds Washington Mutual A | 4.25 | 20,274,269 | +1.2 | 06/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.22 | 15,344,297 | +0.3 | 07/31/2026 |
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 | 20,441,929 $ | Sep 2, 2026 | direct |
| South Martin | Chief Client Officer | 16,632 | 2,910,549 $ | Jul 28, 2026 | direct |
| Beswick Paul | SVP, Chief Information Officer | 16,376 | 2,865,800 $ | Jul 29, 2026 | direct |
| Brennan Katherine | SVP and General Counsel | 7,330 | 1,282,750 $ | Sep 2, 2026 | direct |
| Mills Steven A | Director | 5,952 | 1,041,556 $ | Aug 15, 2026 | direct |
| Broussard Bruce D | Director | 1,617 | 282,975 $ | Aug 15, 2026 | direct |
| Jones John Jude | Chief Marketing Officer | 1,478 | 258,650 $ | 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 |
|---|---|---|---|---|---|---|
| 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: September 18, 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.