The largest holder of Markel stock is BlackRock Advisors LLC, with 568,683 shares (4.59% of the company), worth about $1.03 billion as of September 25, 2026. The 10 largest holders together own 31.3%.
In Q2 2026, 953 institutional holdings reports listed shares worth $19.20 billion.
Insiders reported 42 transactions in the last two years: 11 sales worth $10.96 million and 4 purchases. The newest one on file is from May 7, 2026 (Leopold Diane, Director).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 7, 2026.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 568,683 | 4.59% | $1.0B |
| Vanguard Capital Management LLC | 545,650 | 4.40% | $984.0M |
| Vanguard Portfolio Management LLC | 521,976 | 4.21% | $941.0M |
| Davis Selected Advisers LP | 406,759 | 3.28% | $733.0M |
| Eaton Vance Management | 350,660 | 2.83% | $632.0M |
| Select Equity Group LP | 331,679 | 2.68% | $598.0M |
| State Street Corporation | 312,169 | 2.52% | $563.0M |
| Principal Global Investors LLC | 307,791 | 2.48% | $555.0M |
| Boston Partners Global Investors, Inc. | 307,500 | 2.48% | $554.0M |
| Van Lanschot Kempen Investment Management NV | 230,637 | 1.86% | $416.0M |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 953 | – | $19.2B |
| Q1 2026 | 948 | 9.7 million | $18.5B |
| Q4 2025 | 948 | 10.0 million | $21.4B |
| Q3 2025 | 878 | 9.9 million | $19.0B |
| Q2 2025 | 876 | 10.1 million | $20.2B |
| Q1 2025 | 874 | 10.2 million | $19.1B |
| Q4 2024 | 860 | 10.1 million | $17.3B |
| Q3 2024 | 814 | 9.9 million | $15.6B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Leopold Diane | May 7, 2026 | Director | Purchase at price 1789.19 - 1792.61 per share. | $268,720 |
| Puckett A Lynne | May 1, 2026 | Director | Purchase at price 1795.53 per share. | $102,345 |
| Wilson Simon | Feb 26, 2026 | Officer | Sale at price 2079.48 per share. | $207,948 |
| Gayner Thomas Sinnickson | Feb 24, 2026 | Chief Executive Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Costanzo Brian J | Feb 24, 2026 | Chief Financial Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Crowley Andrew G. | Feb 24, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Grandis Meade P | Feb 24, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Wilson Simon | Feb 24, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Grinnan Richard Randolph | Feb 24, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Markel Steven Andrew | Dec 11, 2025 | Director | Sale at price 2100.00 - 2129.98 per share. | $2.8M |
| Markel Steven Andrew | Nov 28, 2025 | Director | Sale at price 2100.00 per share. | $357,000 |
| Wilson Simon | Nov 25, 2025 | Officer | Sale at price 2072.94 per share. | $155,470 |
Newest 12 of 42 insider transactions in the last two years.
BlackRock Advisors LLC, with 4.59% of the company (as of September 25, 2026). Next: Vanguard Capital Management LLC (4.40%) and Vanguard Portfolio Management LLC (4.21%).
953 institutional holdings reports listed Markel shares in Q2 2026 worth $19.20 billion.
In the last two years insiders reported 11 sales and 4 purchases (42 transactions in all); the newest on file is from May 7, 2026.