Matthew J. Mainer
EVP, CFO & TREASURER · Post Holdings, Inc.
Individual
- 2024
- Dec 5, 2025
- 12
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Matthew J. Mainer files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- William P. Stiritz - $32.29M in POST purchases and sales in the last 12 months
- Gregory L. Curl - $1.45M in POST purchases and sales in the last 12 months
- Nicolas Catoggio - $1.00M in POST purchases and sales in the last 12 months
- David W. Kemper - $176K in POST purchases and sales in the last 12 months
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Frequently asked questions
Who is Matthew J. Mainer?
Matthew J. Mainer is a corporate insider, tracked as EVP, CFO & TREASURER of Post Holdings, Inc. (POST). InsiderAlpha holds 12 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Matthew J. Mainer last file a Form 4?
The most recent primary Form 4 on record is dated 5 December 2025, one of 12 filings going back to 2024.
