Quick Takeaways
- William John Sibold has 1 issuer position tracked on this page.
- Estimated disclosed ownership value: $69,900,418.
- Recent insider filing activity is available below.
Insider Trading & Ownership of William John Sibold
- Location
- West Conshohocken, PA
- Summary
- The estimated net worth of William John Sibold is at least $69,900,418 dollars as of 06 Mar 2026. William John Sibold is the President and CEO, Director of MADRIGAL PHARMACEUTICALS, INC. and owns shares of MADRIGAL PHARMACEUTICALS, INC. (MDGL) stock worth about $69.9M.
- Signature
- /s/ Mardi Dier, as Attorney-in-Fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
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What Changed
- Largest disclosed position: MADRIGAL PHARMACEUTICALS, INC. ($69,900,418).
- Past-year value change for that position: -$9,167,176.
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of William John Sibold
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| MDGL | MADRIGAL PHARMACEUTICALS, INC. | President and CEO, Director | $69,900,418 | -$9,167,176 | -12% | 04 Mar 2026 |
Insider Transactions Reported by William John Sibold:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.