![Maryann Mannen](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>)
Maryann Mannen
Chief Executive Officer at
MARATHON PETROLEUM CORPORATION
Net worth: 40 M $ as of 2026-05-30
Profile
Presently, Maryann T. Mannen is Chairman for The Awty International School Houston and Chief Financial Officer & Executive Vice President at Marathon Petroleum Corp. She is also on the board of Owens Corning, MPLX LP and MPLX GP LLC and Vice Chairman & Secretary at The Cynthia Woods Mitchell Pavilion. In the past Ms. Mannen held the position of Chief Financial Officer & Executive VP of TechnipFMC Plc and Chief Financial Officer & Executive Vice President at FMC Technologies, Inc. (a subsidiary of TechnipFMC Plc), Controller-FoodTech Group at FMC Corp., Finance Manager at Sheller Globe Corp. and Director-Investor Relations for FoodTech International, Inc. Maryann T. Mannen received an MBA and an undergraduate degree from Rider University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-03-01 | 111,847 ( 0.04% ) | 28 M $ | 2026-05-30 | |
MPLX LP 0.02% | 2026-03-01 | 165,459 ( 0.02% ) | 9 M $ | 2026-05-30 |
OWENS CORNING 0.03% | 2026-04-08 | 27,410 ( 0.03% ) | 3 M $ | 2026-05-30 |
Latest news about Maryann Mannen
Maryann Mannen active positions
| Companies | Position | Start |
|---|---|---|
| MARATHON PETROLEUM CORPORATION | Chief Executive Officer | 2024-07-31 |
| MPLX LP | Chief Executive Officer | 2024-07-31 |
| PRUDENTIAL FINANCIAL, INC. | Director/Board Member | 2026-05-11 |
The Cynthia Woods Mitchell Pavilion
 The Cynthia Woods Mitchell Pavilion Movies/EntertainmentConsumer Services Operates as a amphitheatre | Corporate Secretary | - |
MPLX GP LLC
 MPLX GP LLC Oil & Gas PipelinesIndustrial Services Owns, operates, develops and acquires pipelines for petroleum and energy industries | Chief Executive Officer | 2024-07-31 |
The Business Council
 The Business Council Miscellaneous Commercial ServicesCommercial Services Operates as an organization of business leaders | Corporate Officer/Principal | - |
Former positions of Maryann Mannen
| Companies | Position | End |
|---|---|---|
| OWENS CORNING | Director/Board Member | 2026-04-13 |
| TECHNIPFMC PLC | Director of Finance/CFO | 2021-01-24 |
| FMC TECHNOLOGIES, INC. | Director of Finance/CFO | 2016-12-31 |
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| ░░░░░░░ ░░░░░ ░░░░░ | ░░░░░░░░ ░░ ░░░░░░░░░░░ | - |
Training of Maryann Mannen
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
56
1st degree connections
14
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 14 |
|---|---|
FMC Corp.
 FMC Corp. Chemicals: AgriculturalProcess Industries Operates as an agricultural sciences company which produces food, feed, fiber and fuel | Process Industries |
FMC Technologies, Inc.
 FMC Technologies, Inc. Miscellaneous Commercial ServicesCommercial Services Provides energy management systems services | Commercial Services |
Prudential Financial, Inc.
 Prudential Financial, Inc. Life/Health InsuranceFinance Functions as a holding company whose subsidiaries provides life insurance, financial, pensions, retirement and asset management services | Finance |
Sheller Globe Corp.
 Sheller Globe Corp. Auto Parts: OEMProducer Manufacturing Manufactures auto parts | Producer Manufacturing |
Rider University
 Rider University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Owens Corning
 Owens Corning Containers/PackagingProcess Industries Operates as a global producer of residential and commercial building materials, glass-fiber reinforcements and engineered materials for composite systems | Process Industries |
The Business Council
The Business Council Miscellaneous Commercial ServicesCommercial Services Operates as an organization of business leaders | Commercial Services |
The Cynthia Woods Mitchell Pavilion
The Cynthia Woods Mitchell Pavilion Movies/EntertainmentConsumer Services Operates as a amphitheatre | Consumer Services |
FoodTech International, Inc.
 FoodTech International, Inc. Food: Specialty/CandyConsumer Non-Durables Produces frozen meat substitute products | Consumer Non-Durables |
The Awty International School Houston
 The Awty International School Houston General GovernmentGovernment Provides educational services | Government |
Marathon Petroleum Corp.
 Marathon Petroleum Corp. Oil Refining/MarketingEnergy Minerals Operates as petroleum product refiners, marketers and transporters | Energy Minerals |
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 |
TechnipFMC plc
 TechnipFMC plc Oilfield Services/EquipmentIndustrial Services Designs and manufactures subsea & surface technology equipment used for oil and gas industry | Industrial Services |
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