---
schema_version: "secwatch.filing_event.v1"
accession: "0001530950-24-000447"
form_type: "8-K"
ticker: "POST"
cik: "0001530950"
company_name: "Post Holdings, Inc."
filed_at: "2024-12-09T23:59:59+00:00"
generated_at: "2026-05-29T05:35:44.037479+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Post Holdings Reports Avian Flu at Contracted Facility, Affirms FY2025 Outlook

## Summary
- Avian influenza detected at Michael Foods third-party contracted egg-laying flock in Iowa, affecting approximately 4.5 million hens (12% of controlled supply).
- Post affirms fiscal year 2025 Adjusted EBITDA guidance of $1,410-$1,460 million, stating the incident's financial impact is within the range.
- Company will not update on additional avian flu incidents unless cumulative losses exceed another 5% of its controlled supply.
- Press release dated December 9, 2024, includes forward-looking statements and non-GAAP financial measures.

## SEC filing metadata
- accession: 0001530950-24-000447
- form_type: 8-K
- ticker: POST
- cik: 0001530950
- company_name: Post Holdings, Inc.
- filed_at: 2024-12-09T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1530950/000153095024000447/0001530950-24-000447-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1530950/000153095024000447/post-20241209.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001530950-24-000447
- JSON: https://secwatch.observer/filing/0001530950-24-000447.json
- Plain text: https://secwatch.observer/filing/0001530950-24-000447.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.