Sibold William John (CIK 1518611) reported 20 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-07-20). Recent activity: Buy MDGL (50,000 shares), Sell MDGL (140 shares), Sell MDGL (110 shares), Sell MDGL (545 shares), Sell MDGL (275 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Buy | 50,000 | $0 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 140 | $75,984 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 110 | $59,817 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 545 | $296,869 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 275 | $150,070 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 269 | $147,164 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 680 | $372,435 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 47 | $25,797 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 153 | $84,152 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 1 | $551 |
| 2026-07-20 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 280 | $155,414 |
| 2026-03-06 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Buy | 14,995 | $0 |
| 2026-03-06 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 1,663 | $718,316 |
| 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 | 6,485 | $2.6M |
| 2025-08-21 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Sell | 1,131 | $453,531 |
| 2025-03-07 | MADRIGAL PHARMACEUTICALS, INC. (MDGL) | President and CEO | Buy | 13,066 | $0 |
Source: SEC Form 4 filings · as of 2026-07-20