Marsh & McLennan Companies, Inc. (MRSH)
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%.
Ownership Structure
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 | 3.77 | 17,969,182 | +6.2 | 03/31/2026 |
| Wellington Management Company LLP | 3.64 | 17,370,709 | +8.6 | 03/31/2026 |
| Capital Research & Mgmt Co - Division 3 | 3.29 | 15,713,853 | -16.3 | 03/31/2026 |
| Geode Capital Management, LLC | 2.81 | 13,404,172 | +15.1 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| American Funds Washington Mutual A | 4.25 | 20,274,269 | +1.2 | 06/30/2026 |
| Capital Group Wash Mutual Invtrs Comp | 4.25 | 20,274,269 | +1.2 | 06/30/2026 |
| Vanguard Morn Total Stk Mkt Idx Investor | 3.21 | 15,300,089 | -0.7 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 29. Jul 2026 | Beswick Paul | SVP, Chief Information Officer | Sell | 713 | 198.00 | 141,174 |
| 28. Jul 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: July 31, 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.