v3.26.1
Cover Page Document
May 05, 2026
Cover [Abstract]  
Document Type 8-K/A
Document Period End Date May 05, 2026
Entity Registrant Name Post Holdings, Inc.
Entity Incorporation, State or Country Code MO
Entity File Number 001-35305
Entity Tax Identification Number 45-3355106
Entity Address, Address Line One 2503 S. Hanley Road
Entity Address, City or Town St. Louis
Entity Address, State or Province MO
Entity Address, Postal Zip Code 63144
City Area Code 314
Local Phone Number 644-7600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.01 par value per share
Trading Symbol POST
Security Exchange Name NYSE
Entity Emerging Growth Company false
Entity Central Index Key 0001530950
Amendment Flag true
Amendment Description This Amendment No. 1 on Form 8-K/A supplements the disclosures previously included in Item 5.02 in the Current Report on Form 8-K filed by Post Holdings, Inc. (the “Company”) with the Securities and Exchange Commission on May 7, 2026 (the “Original Form 8-K”) to provide a description of the material compensation arrangements for Robert V. Vitale and Nicolas Catoggio, as described below, in connection with the executive transitions disclosed in the Original Form 8-K.