![Garry Peiffer](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>)
Garry Peiffer
Director/Board Member at
MPLX LP
Net worth: 7 M $ as of 2026-05-30
Profile
Garry L. Peiffer is on the board of Blanchard Valley Port Authority, Roppe Corp., MPLX LP (former President & Director) and Findlay-Hancock County Community Foundation and Treasurer & Director at Blanchard Valley Health System. In his past career Mr. Peiffer was EVP-Corporate Planning & Investor Relations at Marathon Petroleum Corp. President & Director at MPLX GP LLC, Senior VP-Finance & Commercial Services at Marathon Ashland Petroleum LLC, EVP-Planning, Investor & Government Relations at Marathon Petroleum Co. LP and Controller of Speedway Petroleum Corp. (which are all subsidiaries of Marathon Petroleum Corp.), Vice President-Finance & Administration at Emro Marketing Co. and Assistant Controller at Marathon Oil Co. Mr. Peiffer received an undergraduate degree from Bowling Green State University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
MPLX LP 0.01% | 2026-05-14 | 136,120 ( 0.01% ) | 7 M $ | 2026-05-30 |
Garry Peiffer active positions
| Companies | Position | Start |
|---|---|---|
| MPLX LP | Director/Board Member | 2012-05-31 |
Blanchard Valley Port Authority | Director/Board Member | - |
Roppe Corp.
 Roppe Corp. Miscellaneous ManufacturingProducer Manufacturing Manufactures and distributes resilient rubber and vinyl flooring products | Director/Board Member | - |
Catholic Community Foundation (Ohio)
 Catholic Community Foundation (Ohio) Services to the Health IndustryHealth Services Catholic Community Foundation (Ohio) is a charitable organization that provides a wide range of services to over 400,000 individuals each year. These services include family, community, emergency, specialized, and treatment, prevention, and recovery services. The company is based in Cleveland, OH. | Director/Board Member | - |
Former positions of Garry Peiffer
| Companies | Position | End |
|---|---|---|
Findlay-Hancock County Community Foundation
 Findlay-Hancock County Community Foundation Investment Trusts/Mutual FundsMiscellaneous Functions as a foundation or endowment | Director/Board Member | 2022-12-31 |
| MARATHON PETROLEUM CORPORATION | Public Communications Contact | 2013-12-31 |
MPLX GP LLC
 MPLX GP LLC Oil & Gas PipelinesIndustrial Services Owns, operates, develops and acquires pipelines for petroleum and energy industries | President | - |
Marathon Oil Co. /Old/
 Marathon Oil Co. /Old/ Oil & Gas ProductionEnergy Minerals Explores, transports and markets crude oil, and natural gas | Corporate Officer/Principal | 2011-04-11 |
Marathon Petroleum Co. LLC
 Marathon Petroleum Co. LLC Oil Refining/MarketingEnergy Minerals Refines, markets and transports petroleum products | Director of Finance/CFO | 2006-04-04 |
Training of Garry Peiffer
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
66
1st degree connections
15
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 15 |
|---|---|
Marathon Petroleum Co. LLC
Marathon Petroleum Co. LLC Oil Refining/MarketingEnergy Minerals Refines, markets and transports petroleum products | Energy Minerals |
Emro Marketing Co.
 Emro Marketing Co. Oil & Gas ProductionEnergy Minerals Oil & gas concern | Energy Minerals |
Bowling Green State University
 Bowling Green State University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Marathon Oil Co. /Old/
Marathon Oil Co. /Old/ Oil & Gas ProductionEnergy Minerals Explores, transports and markets crude oil, and natural gas | Energy Minerals |
Marathon Petroleum Co. LP
 Marathon Petroleum Co. LP Oil Refining/MarketingEnergy Minerals Owns and operates oil refineries | Energy Minerals |
Blanchard Valley Health System
 Blanchard Valley Health System Medical/Nursing ServicesHealth Services Provides health care services | Health Services |
The Fifth Third Bank, Northwestern Ohio, NA
 The Fifth Third Bank, Northwestern Ohio, NA Major BanksFinance Nationally chartered commercial bank | Finance |
Catholic Community Foundation (Ohio)
Catholic Community Foundation (Ohio) Services to the Health IndustryHealth Services Catholic Community Foundation (Ohio) is a charitable organization that provides a wide range of services to over 400,000 individuals each year. These services include family, community, emergency, specialized, and treatment, prevention, and recovery services. The company is based in Cleveland, OH. | Health Services |
Marathon Petroleum Corp.
 Marathon Petroleum Corp. Oil Refining/MarketingEnergy Minerals Operates as petroleum product refiners, marketers and transporters | Energy Minerals |
Blanchard Valley Port Authority | |
Roppe Corp.
Roppe Corp. Miscellaneous ManufacturingProducer Manufacturing Manufactures and distributes resilient rubber and vinyl flooring products | Producer Manufacturing |
MPLX LP
 MPLX LP Oil & Gas PipelinesIndustrial Services Owns, operates, develops and acquires pipelines and other midstream assets | Industrial Services |
MPLX GP LLC
MPLX GP LLC Oil & Gas PipelinesIndustrial Services Owns, operates, develops and acquires pipelines for petroleum and energy industries | Industrial Services |
Speedway Petroleum Corp.
 Speedway Petroleum Corp. Oil Refining/MarketingEnergy Minerals Provides oil and petroleum refinery services | Energy Minerals |
Findlay-Hancock County Community Foundation
Findlay-Hancock County Community Foundation Investment Trusts/Mutual FundsMiscellaneous Functions as a foundation or endowment | Miscellaneous |
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- Insiders
- Garry Peiffer
