Insiders who reported open-market trades in the last 12 months at the companies William P. Stiritz files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Gregory L. Curl - $1.45M in POST purchases and sales in the last 12 months
Nicolas Catoggio - $1.00M in POST purchases and sales in the last 12 months
David W. Kemper - $176K in POST purchases and sales in the last 12 months
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William P. Stiritz is a corporate insider of Post Holdings, Inc. (POST). InsiderAlpha holds 15 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has William P. Stiritz submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has William P. Stiritz been buying or selling stock?
Recorded transactions: 2 open-market purchases ($24.32M) and 4 open-market sales ($32.29M) across all tracked filings.
William P. Stiritz files SEC Form 4 reports at Post Holdings, Inc. (POST). 15 SEC Form 4 filings on record going back to 2024, most recently on 3 September 2026. Most recent open-market trade: sold $19K of POST on 3 September 2026. Lifetime open-market purchases: $24.32M. Lifetime open-market sales: $32.29M.
Recent transactions
6
The latest 6 SEC Form 4 transactions reported by William P. Stiritz.
InsiderAlpha's records for William P. Stiritz go back to 2024: 15 primary Form 4 filings, an average of 5.0 per year. The typical open-market purchase is $12.16M (2 buys totaling $24.32M). The largest single buy on record is $20.38M of POST in 2025. Sales side: 4 recorded sales totaling $32.29M, so the filing history runs sell-heavy by dollar value. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
