Sibold William John (CIK 1518611) reported 11 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-06). Recent activity: Sell MDGL (1,663 shares), Buy MDGL (14,995 shares), Sell MDGL (1,577 shares), Buy MDGL (50,000 shares), Sell MDGL (2,400 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-06 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 1,663 | $718,316 |
| 2026-03-06 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Buy | 14,995 | $0 |
| 2026-01-26 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 1,577 | $776,546 |
| 2025-12-04 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Buy | 50,000 | $0 |
| 2025-12-04 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 2,400 | $1.4M |
| 2025-09-09 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 7,279 | $3.2M |
| 2025-08-21 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 1,131 | $453,531 |
| 2025-08-21 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 6,485 | $2.6M |
| 2025-03-07 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Buy | 13,066 | $0 |
| 2025-02-28 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Buy | 50,000 | $0 |
| 2025-01-27 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 1,584 | $531,020 |
Source: SEC Form 4 filings · as of 2026-03-06