Markel (MKL) — insider trading
Financials · NYSE
Markel (MKL) has 37 reported SEC Form 4 insider transactions in our data, including 3 open-market purchases and 3 open-market sales among the most recent 37 (latest 2026-09-30).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | Costanzo Brian J. | Officer (Chief Financial Officer) | Other acquisition or disposition | 2 | $1,455.58 | $3.0K | Form 4 |
| 2026-09-11 | MARKEL GROUP INC. | 10% owner | Conversion of derivative (derivative) | 7,836,411 | — | — | Form 4 |
| 2026-09-11 | MARKEL GROUP INC. | 10% owner | Conversion of derivative | 7,836,411 | — | — | Form 4 |
| 2026-07-15 | Crowley Andrew G. | Officer (EVP & Pres., Markel Ventures) | Other acquisition or disposition | 7 | $1,730.49 | $12.9K | Form 4 |
| 2026-06-30 | Crowley Andrew G. | Officer (EVP & Pres., Markel Ventures) | Other acquisition or disposition | 3 | $1,617.19 | $4.6K | Form 4 |
| 2026-06-30 | Costanzo Brian J. | Officer (Chief Financial Officer) | Other acquisition or disposition | 2 | $1,617.19 | $3.5K | Form 4 |
| 2026-06-15 | OREILLY MICHAEL | Director | Other acquisition or disposition | 90 | $1,668.65 | $150.0K | Form 4 |
| 2026-06-15 | Puckett A. Lynne | Director | Other acquisition or disposition | 66 | $1,668.65 | $110.0K | Form 4 |
| 2026-06-15 | Cunningham Lawrence A | Director | Other acquisition or disposition | 33 | $1,668.65 | $55.0K | Form 4 |
| 2026-06-15 | Morrison Harold Lawrence Jr. | Director | Other acquisition or disposition | 33 | $1,668.65 | $55.0K | Form 4 |
| 2026-06-15 | MICHAEL JONATHAN E | Director | Other acquisition or disposition | 66 | $1,668.65 | $110.0K | Form 4 |
| 2026-06-15 | Leopold Diane | Director | Other acquisition or disposition | 66 | $1,668.65 | $110.0K | Form 4 |
| 2026-06-15 | Housel Morgan E. | Director | Other acquisition or disposition | 66 | $1,668.65 | $110.0K | Form 4 |
| 2026-06-15 | Besca Mark | Director | Other acquisition or disposition | 81 | $1,668.65 | $135.0K | Form 4 |
| 2026-05-22 | Harris Greta J | Director | Open-market sale | 27 | $1,848.83 | $49.9K | Form 4 |
| 2026-05-22 | Harris Greta J | Director | Open-market sale | 14 | $1,847.36 | $25.9K | Form 4 |
| 2026-05-22 | Harris Greta J | Director | Open-market sale | 35 | $1,846.12 | $64.6K | Form 4 |
| 2026-05-20 | Leopold Diane | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-20 | Puckett A. Lynne | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-20 | Housel Morgan E. | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-20 | OREILLY MICHAEL | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-20 | Cunningham Lawrence A | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-20 | Harris Greta J | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-20 | Besca Mark | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-20 | Morrison Harold Lawrence Jr. | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-20 | MICHAEL JONATHAN E | Director | Grant / award / vesting | 89 | — | $0 | Form 4 |
| 2026-05-15 | Costanzo Brian J. | Officer (Chief Financial Officer) | Other acquisition or disposition | 30 | $1,659.60 | $50.0K | Form 4 |
| 2026-05-15 | Costanzo Brian J. | Officer (Chief Financial Officer) | Shares withheld for taxes / exercise cost | 13 | $1,844.00 | $24.1K | Form 4 |
| 2026-05-15 | Crowley Andrew G. | Officer (EVP & Pres., Markel Ventures) | Other acquisition or disposition | 60 | $1,659.60 | $100.0K | Form 4 |
| 2026-05-15 | Crowley Andrew G. | Officer (EVP & Pres., Markel Ventures) | Shares withheld for taxes / exercise cost | 75 | $1,844.00 | $138.1K | Form 4 |
| 2026-05-15 | Grinnan Richard Randolph | Officer (SVP, Chief Legal Officer & Sec) | Shares withheld for taxes / exercise cost | 116 | $1,844.00 | $214.6K | Form 4 |
| 2026-05-15 | GAYNER THOMAS SINNICKSON | Director, Officer (Chief Executive Officer) | Shares withheld for taxes / exercise cost | 482 | $1,844.00 | $888.2K | Form 4 |
| 2026-05-07 | Leopold Diane | Director | Open-market purchase | 50 | $1,789.19 | $89.5K | Form 4 |
| 2026-05-06 | Leopold Diane | Director | Open-market purchase | 100 | $1,792.61 | $179.3K | Form 4 |
| 2026-05-01 | Puckett A. Lynne | Director | Open-market purchase | 57 | $1,795.53 | $102.3K | Form 4 |
| 2026-03-31 | Costanzo Brian J. | Officer (Chief Financial Officer) | Other acquisition or disposition | 2 | $1,626.96 | $3.0K | Form 4 |
| 2026-03-31 | Crowley Andrew G. | Officer (EVP & Pres., Markel Ventures) | Other acquisition or disposition | 9 | $1,626.96 | $15.0K | Form 4 |
Ask the chat about MKL's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: Markel (MKL).
Last updated 2026-09-30 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.