Post Holdings, Inc. (POST) insider trading: who bought and sold · Investailor

POST insider activity

11 transactions on file (0 open-market purchases and 4 open-market sales).

Scheduled or decided

4 open-market sales by POST insiders, between Sep 1, 2026 and Sep 2, 2026.

A sale made under a trading plan agreed months earlier is not the same event as one decided that week, and the filing itself says which.

Discretionary: $32.29M; 1 filing · 1 person
Planned (10b5-1): None; no sales on file
Not stated: None; no sales on file

Discretionary. The box was on the form and was not ticked.

The sale was made at the prevailing price without a pre-arranged plan behind it.

Planned (10b5-1). The filer ticked the Form 4's 10b5-1 box.

The sale ran under a trading plan adopted before the trade, so it is a schedule executing rather than a view taken this week.

Not stated. The filing does not say.

Either it predates the April 2023 checkbox, or nothing has re-read it since. This tab will not guess which of the other two it was.

Recent transactions11 filed

Date	Insider	Type	Shares	Price	Value	Owned after
2026-09-02	STIRITZ WILLIAM P Open-market saleDiscretionary	Open-market sale Discretionary	−277,707	$84.23	−23.39M	228
2026-09-02	STIRITZ WILLIAM P Open-market saleDiscretionary	Open-market sale Discretionary	−228	$85.01	−19.38K	0
2026-09-01	STIRITZ WILLIAM P Open-market saleDiscretionary	Open-market sale Discretionary	−99,990	$83.54	−8.35M	284,142
2026-09-01	STIRITZ WILLIAM P Open-market saleDiscretionary	Open-market sale Discretionary	−6,207	$84.63	−525.3K	277,935
2026-08-25	Zadoks Jeff A Director Gift	Gift	−26,215	$0.00	−0	1,800

6 more transactions are on Measure

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Each insider's stake1 person

Insider	Role	On Sep 12, 2025	Now	Change	Sold	Shape
STIRITZ WILLIAM P-	-	384,132	0	−100.00%	$32.29M$32.29M no plan

What each insider held after every open-market trade, over the last twelve months.

The figure is each person’s holding as they reported it. It counts one class of stock and excludes grants, option exercises and shares withheld for tax, so a stake can fall here while somebody’s total holding does not. Since April 2023 a Form 4 states whether a trade ran under a pre-arranged 10b5-1 plan; an older one does not, and those dollars read “not stated” rather than being counted either way.

Ask about Post Holdings, Inc.

The assistant answers from what POST has actually filed: 16 annual reports filed with the SEC, 11 Form 4 filings from the last year, 13F positions from the 1 tracked investor who hold it and 6 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.

Pressing one answers it here, from POST's filings and figures. One a day without an account; a free account has its own, and no card.

See every Form 4 POST insiders have filed, not the latest few.

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What an account lets you do with POST's filings

Source

From SEC Form 4 filings, filed within two business days of a transaction.

They are filed by officers, directors and 10%-owners. “Indirect” holdings (a trust, an LLC, a family member) are included and not distinguished from direct ones in this table.

Past transactions say nothing about future ones, and none of this is investment advice.

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What an account lets you do with POST's filings

After each open-market trade