![Matthew Mainer](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Matthew Mainer
Director of Finance/CFO at
POST HOLDINGS, INC.
Net worth: 6 M $ as of 2026-09-29
Profile
Mr. Matthew J.
Mainer is a Treasurer, Chief Financial & Accounting Officer at Post Holdings, Inc. Mr. Mainer was previously employed as an Assistant Treasurer by Mallinckrodt Plc, an Assistant Treasurer by Mallinckrodt Medical, Inc. (US), and a Treasurer & Vice President by ESCO Technologies, Inc. He also served on the board at 8th Avenue Food & Provisions, Inc. He received his undergraduate degree from the University of Missouri-St. Louis and an MBA from the University of Saint Louis.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
POST HOLDINGS, INC. 0.19% | 2026-10-21 | 84,754 ( 0.19% ) | 6 M $ | 2026-09-29 |
Matthew Mainer active positions
| Companies | Position | Start |
|---|---|---|
| POST HOLDINGS, INC. | Director of Finance/CFO | 2022-11-30 |
Former positions of Matthew Mainer
| Companies | Position | End |
|---|---|---|
8th Avenue Food & Provisions, Inc.
 8th Avenue Food & Provisions, Inc. Food: Specialty/CandyConsumer Non-Durables Manufactures nut butters, granola, dried fruits, nuts and trail mix products & retails through online | Director/Board Member | 2024-12-31 |
| MALLINCKRODT PLC | Corporate Officer/Principal | 2014-11-30 |
| ESCO TECHNOLOGIES INC. | Treasurer | 2012-11-30 |
Mallinckrodt Medical, Inc. (US)
 Mallinckrodt Medical, Inc. (US) Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Corporate Officer/Principal | - |
Education of Matthew Mainer
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
63
1st degree connections
7
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 7 |
|---|---|
ESCO Technologies, Inc.
 ESCO Technologies, Inc. Electronic Equipment/InstrumentsElectronic Technology Manufactures and supplies engineered filtration, fluid control products and integrated propulsion systems & diagnostic testing instruments | Electronic Technology |
8th Avenue Food & Provisions, Inc.
8th Avenue Food & Provisions, Inc. Food: Specialty/CandyConsumer Non-Durables Manufactures nut butters, granola, dried fruits, nuts and trail mix products & retails through online | Consumer Non-Durables |
Post Holdings, Inc.
 Post Holdings, Inc. Food: Specialty/CandyConsumer Non-Durables Manufactures markets and distributes branded ready-to-eat cereals | Consumer Non-Durables |
Keenova Therapeutics Plc
 Keenova Therapeutics Plc BiotechnologyHealth Technology Develops therapeutics for rheumatology, ophthalmology, nephrology, neurology, pulmonology, orthopedics, urology and neonatal respiratory problems | Health Technology |
Mallinckrodt Medical, Inc. (US)
Mallinckrodt Medical, Inc. (US) Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Health Technology |
University of Saint Louis
 University of Saint Louis Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
University of Missouri-St. Louis
 University of Missouri-St. Louis Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
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