Markel Corporation (MKL) ownership: Top institutional holder: VANGUARD GROUP INC ($2.52B). Insider activity: Net Seller (0 buys, 20 sells). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 1171904.00 | $2.52B | 2025-12-31 |
| BlackRock, Inc. | 710606.00 | $1.36B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 544507.00 | $1.04B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 524201.00 | $1.00B | 2026-03-31 |
| PRINCIPAL FINANCIAL GROUP INC | 401876.00 | $769.30M | 2026-03-31 |
| Davis Selected Advisers | 383433.00 | $733.96M | 2026-03-31 |
| Select Equity Group, L.P. | 377643.00 | $722.84M | 2026-03-31 |
| MORGAN STANLEY | 357087.00 | $683.50M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-07-15 | |
| Sell | null | 2026-07-15 | |
| Sell | null | 2026-06-30 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 |
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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.