William John Sibold Net Worth
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William John Sibold has an estimated net worth of at least $125.6 million*, as of Aug. 12, 2026. They own 211,689 shares of MDGL stock. They have sold 30,982 shares of MDGL stock since 2021, for an estimated $12.6 million.
William John Sibold $MDGL SEC Form 4 Insider Trading
William John Sibold has filed a total of 18 insider trades in $MDGL since 2021. Their most recent trade was a sale of 280 shares, made on Jul 20, 2026. Their largest trade was a sale of 7,279 shares, made on Sep 09, 2025. We estimate that they now own 211,689 shares of $MDGL, worth an estimated $113.0 million.
Insider Trading at $MDGL
There have been a total of 674 insider trades reported at $MDGL since 2021, with 590,368 shares purchased and 886,230 shares sold. The most active insider traders in $MDGL stock have been Brian Joseph Lynch, Mardi Dier, and Rebecca Taub. The most recent trade was a sale of 275 shares reported by William John Sibold (President and CEO), made on Jul 20, 2026.
History of Insider Stock Trades by William John Sibold
| Company Ticker | Purchase / Sale | Shares | Date | Disclosed (EST) |
|---|---|---|---|---|
MDGL
|
Sale | 280 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 110 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 545 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 275 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 269 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 680 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 47 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 153 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 1 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 140 | Jul 20, 2026 | July 20, 2026, 9:16 p.m. |
|
MDGL
|
Sale | 1,663 | Mar 06, 2026 | March 6, 2026, 7:49 p.m. |
|
MDGL
|
Sale | 1,577 | Jan 26, 2026 | Jan. 26, 2026, 6:14 p.m. |
|
MDGL
|
Sale | 2,400 | Dec 04, 2025 | Dec. 4, 2025, 6:26 p.m. |
|
MDGL
|
Sale | 7,279 | Sep 09, 2025 | Sept. 9, 2025, 9:07 p.m. |
|
MDGL
|
Sale | 6,485 | Aug 21, 2025 | Aug. 21, 2025, 5:44 p.m. |
|
MDGL
|
Sale | 1,131 | Aug 21, 2025 | Aug. 21, 2025, 5:44 p.m. |
|
MDGL
|
Sale | 1,584 | Jan 24, 2025 | Jan. 27, 2025, 6:12 p.m. |
|
MDGL
|
Sale | 6,363 | Sep 09, 2024 | Sept. 11, 2024, 9:51 p.m. |
$MDGL Executives and Stock Owners with Insider Trades
-
Brian Joseph Lynch, SVP and General Counsel
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Mardi Dier, EVP and CFO
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Rebecca Taub, Pres., R&D, and CMO
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Carole Huntsman, Chief Commercial Officer
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Robert E. Waltermire, Senior VP, Chief Pharma Dev.
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Remy Sukhija, Chief Commercial Officer
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William John Sibold, President and CEO
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Shannon T Kelley, General Counsel
-
Mardi Dier, SVP and CFO
-
David Soergel, Chief Medical Officer
*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.