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MATTHEW J MAINER

CIK 1954094 · EVP, CFO & TREASURER · last filed 2025-12-05

MATTHEW J MAINER is an EVP, CFO & TREASURER who has filed 17 SEC Form 4 insider transactions across 1 company since 2022. The most recent filing, for POST, was dated Dec 5, 2025. Current disclosed insider exposure totals $6.3M across reported positions. 18 SEC filings were submitted jointly with Post Holdings, Inc.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$6.32M

Companies

1

Total Filings

17

Lifetime Open-Market Net

$0

Filer Profile

Reported Address
C/O POST HOLDINGS, INC.
2503 S. HANLEY ROAD
ST. LOUIS, MO 63144
Related Filers
Post Holdings, Inc. — 18 joint filings, latest 2025-12-05
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
POST EVP, CFO & TREASURER 74,670 $84.64 $6.32M $0 17 2025-12-05

Recent Filings

17 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2025-12-05 POST Gift (G) −600 $0 EDGAR
2025-12-02 POST Tax (F) −269 -$28.0K EDGAR
2025-11-20 POST Grant (A) +25,461 $0 EDGAR
2025-11-18 POST Tax (F) −2,186 -$232.8K EDGAR
2025-11-14 POST Mixed +5,552 -$463.5K EDGAR
2025-10-24 POST Mixed +9,280 -$783.3K EDGAR
2024-12-09 POST Gift (G) −500 $0 EDGAR
2024-12-03 POST Tax (F) −2,675 -$322.3K EDGAR
2024-11-21 POST Tax (F) −623 -$68.7K EDGAR
2024-11-18 POST Tax (F) −5,660 -$618.0K EDGAR
Showing 1–10 of 17
Page 1 of 2
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.