Sibold William John
President and CEO
Sibold William John has filed 6 SEC Form 4 filings (41 transaction rows) across 1 company, with disclosures dating back to 2025. 5 of those filings fall inside the rolling window. Most recent filing: Sep 11, 2026.
On the most recent filing, Sibold William John is listed as President and CEO at MADRIGAL PHARMACEUTICALS, INC. Inside the rolling window, Sibold William John reported no open-market purchases and 6 open-market sales totaling $10.5M in MDGL. The largest disclosed transaction in the window is a sale of 6,362 MDGL shares on Sep 9, 2026, worth $3.4M.
Companies traded
Other insiders at MDGL
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$10.5M
reported sales (SEC code S)
Companies
1
in the rolling window
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Sep 9, 2025 | MDGL | Sale | $3.2M |
Frequently asked questions
How many SEC Form 4 filings has Sibold William John made?
Sibold William John has filed 6 SEC Form 4 filings (41 transaction rows) across 1 company since 2025.
Which companies does Sibold William John trade?
Sibold William John has filed SEC Form 4 disclosures for 1 company, including MDGL.
When was Sibold William John's most recent SEC Form 4 filing?
Sibold William John's most recent SEC Form 4 filing on Tracefour is dated Sep 11, 2026.
What is Sibold William John's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Sibold William John is listed as President and CEO.
What is Sibold William John's total buy and sell value in the current window?
Inside the rolling retention window, Sibold William John bought $0 and sold $10.5M based on SEC Form 4 filings.
What was Sibold William John's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 6,362 MDGL shares on 2026-09-09, worth $3.4M, per SEC Form 4 filings.