Company Analysis

Post Holdings, Inc. (POST)

NYSE: POST · Grain Mill Products · St. Louis, MO · filing with the SEC since 2011
Grade5.3
◀ Past 5.2● Present 5.7▶ Future 5.0

Filings

427 filings since 2017 beside 1,393 insider forms · Large accelerated filer · read from EDGAR on Nov 13, 2026
Due nextLarge accelerated filer
10-K Annual report for the fiscal year ending Sep 30, 2026Large accelerated filers have 60 days after the fiscal year ends. by Nov 29, 2026
10-Q Quarterly report for the quarter ending Dec 31, 2026Large accelerated filers have 40 days after the quarter ends; quarter ends are taken to the month end. by Feb 9, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 37 days after the quarter ended. The proxy statement was last filed Dec 15, 2025.

Filings a yearinsider forms included
153166203232204226207134
20192020202120222023202420252026

2026 counts to Nov 13, 2026.

Officer or director change (8-K item 5.02): 16 times in the last 36 months, the newest Oct 16, 2026.SEC letters: 3 in the last 36 months, the newest Mar 10, 2025.
Insider forms 1,393

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Oct 30, 2026 SCHEDULE 13G Large holder notice
Oct 16, 2026 8-K items 5.02, 5.05 Officer or director change; item 5.05 · Current report Oct 13, 2026
Aug 7, 2026 8-K/A items 5.02, 9.01 Officer or director change · Current report, amended May 5, 2026
Aug 6, 2026 10-Q Quarterly report Jun 30, 2026
Aug 6, 2026 8-K items 2.02, 9.01 Results released · Current report
Jul 31, 2026 SCHEDULE 13G/A Large holder update, amended
Jun 16, 2026 11-K Employee plan annual report Dec 31, 2025
May 14, 2026 SCHEDULE 13G/A Large holder update, amended
May 14, 2026 SCHEDULE 13G/A Large holder update, amended
May 7, 2026 10-Q Quarterly report Mar 31, 2026
May 7, 2026 8-K items 2.02, 5.02, 7.01, 8.01, 9.01 Results released; Officer or director change; Investor disclosure (Regulation FD); Other event · Current report May 5, 2026
Apr 29, 2026 SCHEDULE 13G Large holder notice
Apr 9, 2026 SCHEDULE 13G/A Large holder update, amended
Mar 27, 2026 SCHEDULE 13G/A Large holder update, amended
Mar 13, 2026 8-K items 2.03, 9.01 New debt or obligation taken on · Current report
Mar 5, 2026 SCHEDULE 13D/A Activist holder update, amended
Mar 4, 2026 8-K items 8.01, 9.01 Other event · Current report
Mar 4, 2026 8-K items 8.01, 9.01 Other event · Current report
Feb 19, 2026 S-3ASR Shelf registration
Feb 5, 2026 10-Q Quarterly report Dec 31, 2025
Feb 5, 2026 8-K items 2.02, 5.02, 8.01, 9.01 Results released; Officer or director change; Other event · Current report Feb 3, 2026
Feb 5, 2026 8-K items 5.02, 7.01, 9.01 Officer or director change; Investor disclosure (Regulation FD) · Current report
Feb 4, 2026 8-K items 3.03, 5.03, 5.07, 9.01 Change to shareholders' rights; Charter, bylaw or fiscal-year change; Shareholder vote · Current report Jan 29, 2026
Dec 19, 2025 8-K items 2.03, 8.01, 9.01 New debt or obligation taken on; Other event · Current report Dec 15, 2025
Dec 15, 2025 ARS Annual report to shareholders Sep 30, 2025
Dec 15, 2025 DEFA14A Extra proxy material
Dec 15, 2025 DEF 14A Proxy statement Jan 29, 2026
Dec 2, 2025 8-K items 8.01, 9.01 Other event · Current report
Dec 1, 2025 8-K items 8.01, 9.01 Other event · Current report
Dec 1, 2025 8-K items 7.01, 8.01, 9.01 Investor disclosure (Regulation FD); Other event · Current report
Nov 26, 2025 8-K items 8.01, 9.01 Other event · Current report Nov 25, 2025
Nov 24, 2025 PRE 14A Preliminary proxy statement Jan 29, 2026
Nov 21, 2025 8-K items 5.02, 9.01 Officer or director change · Current report Nov 18, 2025
Nov 21, 2025 10-K Annual report Sep 30, 2025
Nov 20, 2025 8-K items 2.02, 5.02, 9.01 Results released; Officer or director change · Current report Nov 18, 2025
Oct 31, 2025 SCHEDULE 13G Large holder notice
Oct 20, 2025 8-K items 5.03, 9.01 Charter, bylaw or fiscal-year change · Current report Oct 16, 2025
Oct 15, 2025 SCHEDULE 13D/A Activist holder update, amended
Oct 9, 2025 SCHEDULE 13G Large holder notice
Sep 8, 2025 SCHEDULE 13G/A Large holder update, amended
40 of 427 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton POST · research, not advice