MarketPeel
Insider Trading Intelligence
Pricing
…
WS

William P. Stiritz

POST
DIRECTOR · POST HOLDINGS, INC. · CIK 0001052058
FILING MIX · LIFETIME95%/5%
BUYS
83
SELLS
4
TOTAL VALUE
$43.46M
COMPANIES
1
ACTIVE SINCE
Dec 2019
HOLDINGS NOW
0
AVG SELL PX
$101.77
TRADE KIND
SHOWING 87 / 87
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
2 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by William P. Stiritz, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d2+100.00%+3.43%+1.32%+2.11%+2.11%—
14d2+100.00%+2.62%+0.41%+2.21%+2.21%—
30d2+50.00%-2.65%+4.48%-7.13%-7.13%—
60d2+0.00%-3.39%+5.13%-8.52%-8.52%—
90d2+50.00%-0.72%+6.29%-7.01%-7.01%—
180d2+50.00%-3.69%+10.74%-14.43%-14.43%—
1y2(1 pending)+0.00%-15.33%+27.67%-43.00%-43.00%—
2y2(2 pending)——————
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
POST · 0 shares · as of Dec 18, 2025
01,126,1672,252,3343,378,5014,504,668202020212022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2019
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
FLOW · 83 buys / 4 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
POST
POST HOLDINGS, INC.
SALE
170,000.797$101.81$17.31M4,334,667Dec 18, 2025Dec 19, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASE
170,000.797——4,504,667.797Dec 18, 2025Dec 19, 2025 ↗View →
POST
POST HOLDINGS, INC.
SALE
170,000.797——0Dec 18, 2025Dec 19, 2025 ↗View →
POST
POST HOLDINGS, INC.
SALE
10,703.225$101.19$1.08M4,334,667Dec 17, 2025Dec 19, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASE
10,703.225——4,345,370.225Dec 17, 2025Dec 19, 2025 ↗View →
POST
POST HOLDINGS, INC.
SALE
10,703.225——170,000.797Dec 17, 2025Dec 19, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
57.966$98.93$5.7K180,721.757Dec 16, 2025Dec 18, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
106.804$104.03$11.1K180,638.318Nov 28, 2025Dec 2, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
106.907$103.93$11.1K180,542.617Oct 31, 2025Nov 4, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
103.376$107.48$11.1K180,447.287Sep 30, 2025Oct 2, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
98.196$113.15$11.1K180,356.962Aug 29, 2025Sep 3, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASE
36,000$109.53$3.94M4,334,667Aug 19, 2025Aug 21, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
105.007$105.81$11.1K180,273.764Jul 31, 2025Aug 4, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
101.906$109.03$11.1K180,157.157Jun 30, 2025Jul 2, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASE
186,740$109.12$20.38M4,298,667Jun 5, 2025Jun 9, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
100.469$110.59$11.1K180,054.925May 30, 2025Jun 3, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
98.178$113.17$11.1K179,969.2Apr 30, 2025May 2, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
95.487$116.36$11.1K179,906.468Mar 31, 2025Apr 2, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
97.884$113.51$11.1K179,829.913Feb 28, 2025Mar 4, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
2,500——4,111,927Feb 4, 2025Feb 6, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
104.661$106.16$11.1K179,821.638Jan 31, 2025Feb 4, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
97.072$114.46$11.1K179,702.576Dec 31, 2024Jan 3, 2025 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
92.221$120.48$11.1K179,599.553Nov 29, 2024Dec 3, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
101.738$109.21$11.1K179,535.089Oct 31, 2024Nov 4, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
95.99$115.75$11.1K179,441.287Sep 30, 2024Oct 2, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
95.973$115.77$11.1K179,362.595Aug 30, 2024Sep 4, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
101.599$109.36$11.1K179,302.054Jul 31, 2024Aug 2, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
106.671$104.16$11.1K179,248.608Jun 28, 2024Jul 2, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
104.259$106.57$11.1K179,174.833May 31, 2024Jun 3, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
104.671$106.15$11.1K179,096.125Apr 30, 2024May 1, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
104.543$106.28$11.1K178,982.28Mar 28, 2024Apr 1, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
119.639$92.87$11.1K178,929.3Jan 31, 2024Feb 1, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
2,700——4,109,427Jan 30, 2024Feb 1, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
126.173$88.06$11.1K178,847.666Dec 29, 2023Jan 3, 2024 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
130.058$85.43$11.1K178,757.326Nov 30, 2023Dec 4, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
138.401$80.28$11.1K178,737.856Oct 31, 2023Nov 2, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
129.587$85.74$11.1K178,555.762Sep 29, 2023Oct 3, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
123.853$89.71$11.1K178,444.536Aug 31, 2023Sep 5, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
130.256$85.30$11.1K178,312.309Jul 31, 2023Aug 2, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
128.227$86.65$11.1K178,218.624Jun 30, 2023Jul 5, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
130.777$84.96$11.1K178,114.922May 31, 2023Jun 1, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
122.785$90.49$11.1K177,986.922Apr 28, 2023May 1, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
123.632$89.87$11.1K177,861.174Mar 31, 2023Apr 4, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
123.509$89.96$11.1K177,743.916Feb 28, 2023Mar 1, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
2,700——4,106,727Jan 31, 2023Feb 2, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
117.081$94.95$11.1K177,644.645Jan 31, 2023Feb 2, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
110.788$90.26$10.0K177,585.642Dec 30, 2022Jan 3, 2023 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
106.824$93.61$10.0K177,483.322Nov 30, 2022Dec 2, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
110.592$90.42$10.0K177,419.741Oct 31, 2022Nov 1, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
122.082$81.91$10.0K177,448.069Sep 30, 2022Oct 4, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
112.661$88.76$10.0K177,277.707Aug 31, 2022Sep 2, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
115.019$86.94$10.0K177,205.745Jul 29, 2022Aug 2, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
121.43$82.35$10.0K177,152.891Jun 30, 2022Jul 5, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
121.607$82.23$10.0K177,022.704May 31, 2022Jun 1, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
134.423$74.39$10.0K177,030.368Apr 29, 2022May 2, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
144.38$69.26$10.0K176,936.012Mar 31, 2022Apr 4, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
1,110——4,104,027Mar 10, 2022Apr 4, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
95.109$105.14$10.0K118,951.118Feb 28, 2022Mar 1, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
2,300——4,102,917Feb 1, 2022Feb 2, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
94.498$105.82$10.0K118,894.639Jan 31, 2022Feb 2, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
88.705$112.73$10.0K118,782.442Dec 31, 2021Jan 4, 2022 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
103.517$96.60$10.0K118,747.136Nov 30, 2021Dec 2, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
98.539$101.48$10.0K118,672.261Oct 29, 2021Nov 2, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
90.775$110.16$10.0K118,550.457Sep 30, 2021Oct 4, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
89.355$111.91$10.0K118,480.074Aug 31, 2021Sep 2, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
97.711$102.34$10.0K118,439.819Jul 30, 2021Aug 3, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
92.189$108.47$10.0K118,321.637Jun 30, 2021Jul 2, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
86.443$115.68$10.0K118,217.43Jun 1, 2021Jun 2, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
87.887$113.78$10.0K118,138.428Apr 30, 2021May 4, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
94.587$105.72$10.0K118,111.68Mar 31, 2021Apr 1, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
104.099$96.06$10.0K118,073.941Feb 26, 2021Mar 1, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
101.81$98.22$10.0K117,981.609Feb 10, 2021Feb 12, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
2,600——4,100,617Feb 2, 2021Feb 4, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
98.998$101.01$10.0K117,868.663Dec 31, 2020Jan 4, 2021 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
105.862$94.46$10.0K117,762.964Nov 30, 2020Dec 1, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
116.412$85.90$10.0K117,658.618Oct 30, 2020Nov 2, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
116.276$86.00$10.0K117,547.753Sep 30, 2020Oct 1, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
113.608$88.02$10.0K117,408.829Aug 31, 2020Sep 1, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
112.686$88.74$10.0K117,306.474Jul 31, 2020Aug 4, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
114.126$87.62$10.0K117,195.552Jun 30, 2020Jul 2, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
114.86$87.06$10.0K117,064.831May 29, 2020Jun 2, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
108.87$91.85$10.0K116,946.812Apr 30, 2020May 4, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
120.522$82.97$10.0K116,848.134Mar 31, 2020Apr 1, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
98.753$101.26$10.0K116,728.009Feb 28, 2020Mar 2, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
2,400——4,098,017Feb 4, 2020Feb 6, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
95.627$104.57$10.0K116,622.808Jan 31, 2020Feb 4, 2020 ↗View →
POST
POST HOLDINGS, INC.
PURCHASEGRANT
Stock grant
91.657$109.10$10.0K116,552.077Dec 31, 2019Jan 2, 2020 ↗View →
Other insiders · POST
Loading peer insiders…
About this filer
CIK 0001052058
ROLE
Director
PRIMARY
POST
COMPANIES
1
ACTIVE SINCE
Dec 2019
MARKETPEEL · /INSIDER/0001052058DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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