Marsh & McLennan Companies, Inc. (MRSH) ownership: insiders 0% · institutions 95% (13F 2026-03-31). Insider activity, 90 days: 4 sales, 0 open-market buys. 2 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| Vanguard | 49020188.00 | $8.50B | 10.3% | 2026-03-31 |
| Capital Group | 45923740.00 | $7.97B | 9.6% | 2026-03-31 |
| BlackRock | 42061676.00 | $7.30B | 8.8% | 2026-03-31 |
| State Street | 22070945.00 | $3.83B | 4.6% | 2026-03-31 |
| Wellington Management | 17372254.00 | $3.01B | 3.6% | 2026-03-31 |
| Geode Capital Management | 13404172.00 | $2.32B | 2.8% | 2026-03-31 |
| FMR (Fidelity) | 10180705.00 | $1.77B | 2.1% | 2026-03-31 |
| UBS | 9903608.00 | $1.72B | 2.1% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-08-15 | |
| Sell | null | 2026-08-15 | |
| Sell | null | 2026-08-14 | |
| Sell | null | 2026-08-14 | |
| Sell | null | 2026-08-14 | |
| Sell | null | 2026-08-14 | |
| Sell | null | 2026-08-14 | |
| Sell | null | 2026-08-14 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.