William John Sibold is CEO & President at MADRIGAL PHARMACEUTICALS, INC. (MDGL). They have made 7 open-market trades across 1 company since 2024, most recently 2026-09-11.
CIK 0001518611
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MDGL | 197,746 | $79.3M |
| AVNR | 20,000 | — |
| Total | $79.3M |
Shares reported on the most recent Form 4, priced at the 2026-09-11 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MDGL | SELL · 10b5-1 | 2026-09-09 | 2026-09-11 | $538.65 | $6.2M | -3.9% | -12.5% | — |
| MDGL | SELL | 2026-07-20 | 2026-07-20 | $547.30 | $1.4M | -9.6% | -0.9% | -18.0% |
| MDGL | SELL | 2026-03-06 | 2026-03-06 | $431.94 | $718K | +3.0% | +24.3% | +14.8% |
| MDGL | SELL | 2026-01-26 | 2026-01-26 | $492.42 | $777K | -6.4% | -12.1% | +5.1% |
| MDGL | SELL | 2025-12-04 | 2025-12-04 | $575.34 | $1.4M | -5.3% | +0.5% | -25.7% |
| MDGL | SELL | 2025-09-09 | 2025-09-09 | $445.63 | $6.5M | -1.8% | -4.4% | +26.9% |
| MDGL | SELL · 10b5-1 | 2025-08-21 | 2025-08-21 | $400.11 | $5.6M | +7.4% | +8.6% | +37.1% |
| MDGL | SELL | 2025-01-24 | 2025-01-27 | $335.24 | $1.1M | +4.1% | +12.1% | +4.4% |
| MDGL | SELL | 2024-09-09 | 2024-09-11 | $243.83 | $3.1M | -1.9% | -7.0% | +35.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.