Costanzo Brian J. has filed 15 insider transactions across 1 company since December 2023.
Most recent transaction: a grant/award of 654 shares of MARKEL GROUP INC. ($MKL) on February 24, 2026.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 24, 2026 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | A | Common Stock | 655 | $0.00 | 1,835.0196 | 12,687,000 | 55.46% | 0.01% |
| Dec. 31, 2025 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1602.62 | 1,180.3786 | 12,687,000 | 0.19% | 0.00% |
| Dec. 2, 2025 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | F | Common Stock | 22 | $2060.83 | 1,178.1966 | 12,687,000 | 1.81% | 0.00% |
| Sept. 30, 2025 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1624.66 | 1,199.9196 | 13,017,000 | 0.15% | 0.00% |
| June 30, 2025 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1580.87 | 1,195.9376 | 13,017,000 | 0.19% | 0.00% |
| March 31, 2025 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1459.76 | 1,190.6226 | 13,017,000 | 0.17% | 0.00% |
| Feb. 18, 2025 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | A | Common Stock | 379 | $0.00 | 1,185.8814 | 13,017,000 | 47.05% | 0.00% |
| Dec. 31, 2024 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1336.81 | 806.4694 | 13,058,000 | 0.26% | 0.00% |
| Dec. 5, 2024 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | F | Common Stock | 21 | $1759.04 | 804.3409 | 13,058,000 | 2.54% | 0.00% |
| Sept. 30, 2024 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1333.29 | 825.3409 | 13,347,000 | 0.22% | 0.00% |
| June 28, 2024 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1282.46 | 820.4949 | 13,347,000 | 0.27% | 0.00% |
| March 28, 2024 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1220.99 | 815.1456 | 13,347,000 | 0.24% | 0.00% |
| Feb. 20, 2024 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | A | Common Stock | 108 | $0.00 | 809.8120 | 13,347,000 | 15.39% | 0.00% |
| Feb. 20, 2024 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | A | Common Stock | 94 | $0.00 | 701.8120 | 13,347,000 | 15.47% | 0.00% |
| Dec. 29, 2023 | MARKEL GROUP INC. | $MKL | Costanzo Brian J. | Chief Financial Officer | J | Common Stock | 2 | $1206.92 | 607.8120 | 13,580,000 | 0.38% | 0.00% |