Post Holdings POST Insider Ownership

NYSE POST

$78.60 +1.18 (+1.52%)

As of: Oct 20, 2026 · 12:47 PM EDT

Insider Holdings by Owner

6.25Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

14.48%

▼-0.767% pp QoQ

Shares Held by Insiders

6.53Mn

filed for Sep 2026

▼-5.03% QoQ

Shares Outstanding

45.10Mn

45,100,000 shares

Direct Holdings

5.91Mn

Indirect: 626.47K

Net Shares Traded (QoQ)

-345.95K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 5, 2026

Across the past 12 months, open-market trades by Post Holdings insiders totaled $176,274 in purchases (1.8K shares) and $34.9 million in sales (408.96K shares).

Counted by insider, open-market buying of POST stock in the past 12 months came from one insider and selling from 4 insiders.
Among Post Holdings' insiders, the largest open-market purchases in the past 12 months were by David W. Kemper (Director), totaling $176,274 (1.8K shares), most recently on November 24, 2025.
Meanwhile, the largest open-market sales of POST in the past 12 months were by William P. Stiritz, totaling $32.29 million (384.13K shares), most recently on September 2, 2026.
Away from the open market, POST insiders received 520.85K shares in stock awards, acquired 284.47K shares through option exercises and conversions, gave up 245.68K shares to cover taxes or exercise prices and gave away 310.74K shares as gifts over the last 12 months.
Business Quant data puts insider holdings in POST at 6.53Mn shares across insiders' latest Form 4 filings, or 14.48% of the 45.1Mn shares outstanding; that total is down 5.03% from 6.88Mn shares at the end of Q2 2026 and down 0.21% from 6.55Mn shares at the end of Q3 2025.
Of the 6.53Mn shares held by Post Holdings insiders, 5.91Mn shares (90.41%) are held directly and 626.47K shares (9.59%) indirectly, through trusts, partnerships, family members and other entities.
Business Quant counts 18 insiders with holdings in Post Holdings stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
Post Holdings' three largest insider shareholders, based on their latest Form 4 filings, are William P. Stiritz (4.5Mn shares), Robert V. Vitale (President & CEO, 987.34K shares) and Jeff A. Zadoks (Director, 247.73K shares).
William P. Stiritz alone accounts for 68.95% of the shares held by Post Holdings insiders.
A total of 142 Form 4 filings with transactions in Post Holdings stock were made over the past 12 months, by 16 insiders.
These insider figures for Post Holdings are based on Form 4 filings through October 2, 2026.

Form 4 Holdings

Insiders Holding POST

Insiders 19

Shares held 6.25Mn

Of outstanding 13.86%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	William P Stiritz	Chairman And Ceo	4,334,667	0	4,334,667	69.3%	19 Dec, 2025
2	Robert V Vitale	President Ceo	987,338	0	987,338	15.8%	20 Nov, 2025
3	Mark W Westphal	Pres., Foodservice	197,756	0	197,756	3.2%	20 Nov, 2025
4	Jeff A Zadoks	Director	0	197,100	197,100	3.2%	27 Aug, 2026
5	Diedre J Gray	Evp, Gc Cao, Secy	0	164,903	164,903	2.6%	29 Dec, 2025
6	Nicolas Catoggio	Pres Ceo, Pcb	75,542	0	75,542	1.2%	26 Nov, 2025
7	Matthew J Mainer	Evp, Cfo Treasurer	74,670	0	74,670	1.2%	05 Dec, 2025
8	David P Skarie	Director	56,991	0	56,991	0.9%	05 Feb, 2026
9	Thomas C Erb	Director	38,675	0	38,675	0.6%	05 Feb, 2026
10	David W Kemper	Director	33,122	0	33,122	0.5%	05 Feb, 2026
11	Edwin H Callison	Director	17,045	0	17,045	0.3%	04 Apr, 2022
12	Gregory L Curl	Director	15,107	0	15,107	0.2%	14 May, 2026
13	Bradly A Harper	Svp, Chief Accting Officer	10,963	0	10,963	0.2%	12 Jan, 2026
14	Ellen F Harshman	Director	10,372	0	10,372	0.2%	05 Sep, 2024
15	Robert E Grote	Director	9,665	0	9,665	0.2%	20 Nov, 2024
16	Jennifer Kuperman Johnson	Director	8,675	0	8,675	0.1%	05 Feb, 2026
17	Dorothy M Burwell	Director	8,665	0	8,665	0.1%	05 Feb, 2026
18	Gregory Carl Pearson	Pres Ceo, Pcb	8,485	0	8,485	0.1%	06 Apr, 2026
19	Michelle Marie Atkinson	Director	1,700	0	1,700	0.0%	18 Mar, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

2,472 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
30 Sep, 2026	Gregory L Curl	Director	Acquired A	153	$72.85	$11.11K	8,216	Direct
30 Sep, 2026	Jennifer Kuperman Johnson	Director	Acquired A	153	$72.85	$11.11K	7,515	Direct
30 Sep, 2026	Thomas C Erb	Director	Acquired A	153	$72.85	$11.11K	7,515	Direct
30 Sep, 2026	David W Kemper	Director	Acquired A	236	$72.85	$17.22K	21,572	Direct
30 Sep, 2026	Michelle Marie Atkinson	Director	Acquired A	153	$72.85	$11.11K	822	Direct
30 Sep, 2026	Dorothy M Burwell	Director	Acquired A	153	$72.85	$11.11K	9,028	Direct
30 Sep, 2026	David P Skarie	Director	Acquired A	183	$72.85	$13.33K	34,028	Direct
30 Sep, 2026	Jeff A Zadoks	Director	Acquired A	153	$72.85	$11.11K	822	Direct
01 Sep, 2026	William P Stiritz	Other	Disposed S	99,990	$83.54	$8.35Mn	284,142	Indirect
01 Sep, 2026	William P Stiritz	Other	Disposed S	6,207	$84.63	$525.30K	277,935	Indirect
02 Sep, 2026	William P Stiritz	Other	Disposed S	277,707	$84.23	$23.39Mn	228	Indirect
02 Sep, 2026	William P Stiritz	Other	Disposed S	228	$85.01	$19.38K	0	Indirect
31 Aug, 2026	Jeff A Zadoks	Director	Acquired A	133	$83.36	$11.11K	670	Direct
31 Aug, 2026	Gregory L Curl	Director	Acquired A	133	$83.36	$11.11K	8,060	Direct
31 Aug, 2026	Michelle Marie Atkinson	Director	Acquired A	133	$83.36	$11.11K	670	Direct
31 Aug, 2026	Thomas C Erb	Director	Acquired A	133	$83.36	$11.11K	7,360	Direct
31 Aug, 2026	Jennifer Kuperman Johnson	Director	Acquired A	133	$83.36	$11.11K	7,360	Direct
31 Aug, 2026	David P Skarie	Director	Acquired A	160	$83.36	$13.33K	33,832	Direct
31 Aug, 2026	Dorothy M Burwell	Director	Acquired A	133	$83.36	$11.11K	8,872	Direct
31 Aug, 2026	David W Kemper	Director	Acquired A	207	$83.36	$17.22K	21,328	Direct

Showing 1 to 20 of 2,472 transactions