William P Stiritz - Net Worth and Insider Trading
William P Stiritz Net Worth
The estimated net worth of William P Stiritz is at least $371 Million dollars as of 2025-04-25. William P Stiritz is the Director of Post Holdings Inc and owns about 3,249,118 shares of Post Holdings Inc (POST) stock worth over $371 Million. Details can be seen in William P Stiritz's Latest Holdings Summary section.
Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the final shares held after open market or private purchases and sales of common stock with a transaction code of "P" or "S" on Form 4, assuming that William P Stiritz has not made any transactions after 2019-02-08 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of William P Stiritz
William P Stiritz Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, William P Stiritz owns 6 companies in total, including Post Holdings Inc (POST) , Vail Resorts Inc (MTN) , and Edgewell Personal Care Co (EPC) among others .
Click here to see the complete history of William P Stiritz’s form 4 insider trades.
Insider Ownership Summary of William P Stiritz
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
POST | Post Holdings Inc | 2019-02-08 | Chief Executive Officer |
MTN | Vail Resorts Inc | 2003-11-20 | director |
EPC | Edgewell Personal Care Co | 2003-06-30 | director |
![]() | ![]() | 2007-06-27 | director & 10 percent owner |
![]() | ![]() | 2005-10-27 | director |
![]() | ![]() | 2003-12-15 | director |
William P Stiritz Latest Holdings Summary
William P Stiritz currently owns a total of 1 stock. William P Stiritz owns 3,249,118 shares of Post Holdings Inc (POST) as of February 8, 2019, with a value of $371 Million.
Latest Holdings of William P Stiritz
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
POST | Post Holdings Inc | 2019-02-08 | 3,249,118 | 114.19 | 371,016,784 |
Holding Weightings of William P Stiritz
William P Stiritz Form 4 Trading Tracker
According to the SEC Form 4 filings, William P Stiritz has made a total of 0 transactions in Post Holdings Inc (POST) over the past 5 years. The most-recent trade in Post Holdings Inc is the acquisition of 35,755 shares on February 8, 2019, which cost William P Stiritz around $3 Million.
Insider Trading History of William P Stiritz
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William P Stiritz Trading Performance
GuruFocus tracks the stock performance after each of William P Stiritz's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by William P Stiritz is 11.59%. GuruFocus also compares William P Stiritz's trading performance to market benchmark return within the same time period. The performance of stocks bought by William P Stiritz within 3 months outperforms 5 times out of 5 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how William P Stiritz's insider trading performs compared to the benchmark.
Performance of William P Stiritz
William P Stiritz Ownership Network
Ownership Network List of William P Stiritz
Ownership Network Relation of William P Stiritz

William P Stiritz Owned Company Details
What does Post Holdings Inc do?
Who are the key executives at Post Holdings Inc?
William P Stiritz is the Chief Executive Officer of Post Holdings Inc. Other key executives at Post Holdings Inc include PRES & CEO & PCB Nicolas Catoggio , SVP & CHIEF ACCTING OFFICER Bradly A Harper , and Chief Financial Officer Robert V Vitale .
Post Holdings Inc (POST) Insider Trades Summary
Over the past 18 months, William P Stiritz made no insider transaction in Post Holdings Inc (POST). Other recent insider transactions involving Post Holdings Inc (POST) include a net sale of 39,940 shares made by Nicolas Catoggio , a net sale of 6,846 shares made by Bradly A Harper , and a net purchase of 8,000 shares made by Thomas C Erb .
In summary, during the past 3 months, insiders sold 109,339 shares of Post Holdings Inc (POST) in total and bought 0 shares, with a net sale of 109,339 shares. During the past 18 months, 194,424 shares of Post Holdings Inc (POST) were sold and 8,000 shares were bought by its insiders, resulting in a net sale of 186,424 shares.
Post Holdings Inc (POST)'s detailed insider trading history can be found in Insider Trading Tracker table.
Post Holdings Inc Insider Transactions
William P Stiritz Mailing Address
Above is the net worth, insider trading, and ownership report for William P Stiritz. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, William P Stiritz's mailing address is: St Louis Mo 63131.