William John Sibold insider trades: Madrigal Pharmaceuticals (MDGL) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where William reports to the SEC
Open-market buys and sales
9 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 11, 2026 | MDGL | ↓ Sell | 11,583 | $538.65 | $6.2M | Direct | Sep 11, 2026 (0d) |
| Jul 20, 2026 | MDGL | ↓ Sell | 2,500 | $547.30 | $1.4M | Direct | Jul 20, 2026 (0d) |
| Mar 6, 2026 | MDGL | ↓ Sell | 1,663 | $431.94 | $718K | Direct | Mar 6, 2026 (0d) |
| Jan 26, 2026 | MDGL | ↓ Sell | 1,577 | $492.42 | $777K | Direct | Jan 26, 2026 (0d) |
| Dec 4, 2025 | MDGL | ↓ Sell | 2,400 | $575.34 | $1.4M | Direct | Dec 4, 2025 (0d) |
| Sep 9, 2025 | MDGL | ↓ Sell | 7,279 | $445.63 | $3.2M | Direct | Sep 9, 2025 (0d) |
| Aug 21, 2025 | MDGL | ↓ Sell | 7,616 | $400.18 | $3.0M | Direct | Aug 21, 2025 (0d) |
| Jan 24, 2025 | MDGL | ↓ Sell | 1,584 | $335.24 | $531K | Direct | Jan 27, 2025 (3d) |
| Sep 9, 2024 | MDGL | ↓ Sell | 6,363 | $243.83 | $1.6M | Direct | Sep 11, 2024 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MDGL insiders
Open-market trades in the last 12 months
About William John Sibold's insider trades
William John Sibold is President and CEO at Madrigal Pharmaceuticals (MDGL). Since Sep 9, 2024, William has reported no open-market purchases and 9 sales worth $18.9M on SEC Form 4. In the last 12 months: 5 sales ($10.5M).
Their filings also include grants and awards (5 filings), option exercises (3 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MDGL insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.