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William Stiritz Insider Profile

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William Stiritz, Chairman Emeritus at Post Holdings, holds 4.50M shares in Post Holdings (Ticker: POST), holds 2.77M shares in Energizer Holdings (Ticker: ENR), holds 1.08M shares in Ball (Ticker: BALL). Most recently, William Stiritz Sold ― shares of Post Holdings on Sep 03, 2026 for an estimated value of $32.29M.
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William Stiritz

William Stiritz
Post Holdings (POST)
Chairman Emeritus

Ranked #24,560 out of 109,193 Corporate Insiders

Profitable Transactions

75%
6 out of 8 Profitable Transactions

Average Return

+7.40%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

$461M
71.80%
13.30%
13.11%
1.43%
0.35% Others
A breakdown of William Stiritz's holdings
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Insider Roles

Post Holdings
(POST)
Chairman Emeritus
Ball
(BALL)
Director
Energizer Holdings
(ENR)
Director
Macy's
(M)
Director
+1 other positions
Roles that William Stiritz holds in companies
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Most Profitable Insider Trade

Stock:
Post Holdings
(POST)
Rating:Informative Buy
Date:Feb 09, 2016 - Feb 09, 2017
Return:+38.40%
The most profitable trade made by William Stiritz
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William Stiritz's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
POST
Post Holdings
Sep 03, 2026
Chairman Emeritus
Informative Sell
32.29M
$330.73M
ENR
Energizer Holdings
―
Director
―
$60.40M
BALL
Ball
―
Director
―
$61.28M
M
Macy's
―
Director
―
$6.60M
MTN
Vail Resorts
Sep 24, 2009
Director
Uninformative Buy
―
$1.60M
List of latest transactions for each holding click on a transaction to see William Stiritz's performance on stock
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William Stiritz insider profile FAQ

What is the percentage of profitable transactions made by William Stiritz?
The percentage of profitable transactions made by William Stiritz is 75%.
    What is the average return per transaction made by William Stiritz?
    The average return per transaction made by William Stiritz is 7.40%.
      What stocks does William Stiritz hold?
      William Stiritz holds: POST, ENR, BALL, M, MTN stocks.
        What was William Stiritz’s latest transaction?
        William Stiritz latest transaction was an Informative Sell of $32.29M.
          What was William Stiritz's most profitable transaction?
          William Stiritz’s most profitable transaction was an Informative Buy of POST stock on February 9, 2016. The return on the trade was 38.40%.
            What is William Stiritz's role in Post Holdings?
            William Stiritz's role in Post Holdings is Chairman Emeritus.
              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.