tiprankstipranks
TipRanksTop Financial ExpertsInsidersWilliam John Sibold

William John Sibold Insider Profile

4 Followers
William John Sibold, President & CEO, Director at Madrigal Pharmaceuticals, holds 209.33K shares in Madrigal Pharmaceuticals (Ticker: MDGL), holds 20.00K shares in Avanir Pharmaceuticals (Ticker: AVNR).
See the Hottest Stocks Based on Insider Trading >
tipranks
William John Sibold

William John Sibold
Madrigal Pharmaceuticals (MDGL)
President & CEO, Director

Ranked #98,351 out of 108,814 Corporate Insiders

Profitable Transactions

0%
0 out of 5 Profitable Transactions

Average Return

-39.70%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

$114M
100.00%
A breakdown of William John Sibold's holdings
See the Top Stocks by Insiders

Insider Roles

Madrigal Pharmaceuticals
(MDGL)
President & CEO, Director
Roles that William John Sibold holds in companies
See the Top Corporate Insiders

Most Profitable Insider Trade

Stock:
Madrigal Pharmaceuticals
(MDGL)
Rating:Informative Sell
Date:Jan 26, 2026 - Today
Return:-6.90%
The most profitable trade made by William John Sibold
See the Latest Stocks Traded by Insiders

William John Sibold's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
MDGL
Madrigal Pharmaceuticals
Jul 20, 2026
President & CEO, Director
Uninformative Buy
26.29M
$113.58M
AVNR
Avanir Pharmaceuticals
May 05, 2011
―
Uninformative Buy
―
―
List of latest transactions for each holding click on a transaction to see William John Sibold's performance on stock
See All Insider Trading from Today

You May Also Like

Meet our Smart Portfolio. See what top analysts say about your stocks.Get a breakdown of the different strategies based on detected insider trading activity.Find the best performing Analyst in each sector. Follow them so you never miss a recommendation.

William John Sibold insider profile FAQ

What is the percentage of profitable transactions made by William John Sibold?
The percentage of profitable transactions made by William John Sibold is 0%.
    What is the average return per transaction made by William John Sibold?
    The average return per transaction made by William John Sibold is -39.70%.
      What stocks does William John Sibold hold?
      William John Sibold holds: MDGL, AVNR stocks.
        What was William John Sibold’s latest transaction?
        William John Sibold latest transaction was an Uninformative Buy of $26.29M.
          What was William John Sibold's most profitable transaction?
          William John Sibold’s most profitable transaction was an Informative Sell of MDGL stock on January 26, 2026. The return on the trade was -6.90%.
            What is William John Sibold's role in Madrigal Pharmaceuticals?
            William John Sibold's role in Madrigal Pharmaceuticals is President & CEO, Director.
              How can I follow the stock ratings of top corporate insiders?
              Head over to our Expert Center to see a list of the Top 100 corporate insiders and follow the corporate insiders of your choice. Visit their profiles for more details about their stock transactions and see how they perform on a stock-by-stock basis.