internal
Maryann T. Mannen
President, Chief Executive Officer and Chairman
Executive
4 yr
4 reports
Marathon Petroleum Corporation ·MPC
CEO combines chair role after executive chairman retirement
Energy · Fortune #24 · Divisional structure · 18K employees · Findlay, OH
4
CEO span
↓ tighter than peers (avg 9)
4
Avg span
moderate
2
Max depth
2 levels
3.8 yr
Avg tenure
75%
Internal hires
↑ above industry avg
Consolidated financials FY2025 · period end 2025-12-31 · 10-K
Revenue
$132.7B
Operating income
$8.3B
Net income
$4.0B
Total assets
$84.0B
Shares out
295M
Sourced from Marathon Petroleum Corporation DEF 14A · filed 2026-03-16 ↗ View on SEC
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CEO and board leadership are unified at Marathon Petroleum following the retirement of its executive chairman. This page outlines the current executive structure, leadership roles, recent changes and peer comparisons for the company.
What to model
Use the chart to test org decisions, not just view reporting lines
Start with the public baseline, then use the scenario views and source-backed changes to ask what happens when leadership, span, or team ownership shifts.
Latest signal Maria A. Khoury joined as EVP and CFO
Appointed CFO effective January 19, 2026.
Source · See change logScenario views in the chart
- Add Chief Operating Officer Introduce a COO role to centralize operational oversight across refining and logistics.
- Separate Chair and CEO roles Reintroduce an independent board chair to rebalance governance and management oversight.
Atlas work this supports
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The people
Who's running this
5 executives identified as Named Executive Officers in the most recent SEC proxy. Bar length scales with tenure.
internal
Michael J. Hennigan
Former Executive Chairman
Executive
1 yr
0 reports
Maria A. Khoury
Executive Vice President and Chief Financial Officer
Finance
0 yr
0 reports
internal
Rick D. Hessling
Chief Commercial Officer
Commercial
6 yr
0 reports
internal
Molly R. Benson
Chief Legal Officer and Corporate Secretary
Legal
5 yr
0 reports
The pay
Executive compensation
From the most recent DEF 14A Summary Compensation Table. 1 named executive officers disclosed. Bar length scales with total compensation.
Maryann T. Mannen $19.0M
- Base salary
- $1.40M
- Stock awards
- $13.39M
- Non-equity incentive
- $3.30M
- Pension change
- $467K
- Other
- $454K
- Fiscal year
- FY2025
- Source
- SEC DEF 14A ↗
The businesses
How Marathon Petroleum Corporation divides the work
3 divisions report into the group CEO. Tile size scales with estimated headcount.
Finance
1K employees
EVP & CFO (Maria A. Khoury)
Oversees financial reporting, treasury, tax and capital allocation.
Commercial
3K employees
Chief Commercial Officer (Rick D. Hessling)
Manages refining optimization, marketing, logistics and trading.
Legal & Governance
300 employees
Chief Legal Officer (Molly R. Benson)
Handles legal affairs, compliance, governance and corporate secretary functions.
The thesis
Why this org is unusual
The most distinctive feature of Marathon Petroleum’s current structure is the consolidation of CEO and Board Chair roles following the retirement of the Executive Chairman.
This change concentrates both management and board leadership authority in Maryann T. Mannen.
The organization otherwise reflects a classic divisional energy model, with strong functional executives in finance, commercial operations and legal reporting directly to the CEO. The absence of a separate COO role places greater operational coordination responsibility on divisional and commercial leadership.
- CEO also serves as Board Chair
- No standalone COO role
The comparison
How Marathon Petroleum Corporation stacks up
Compared with other U.S. downstream energy peers, Marathon Petroleum’s structure is relatively streamlined at the top. Many peers retain a separate board chair or COO to balance operational complexity. MPC’s combined CEO-chair model is less common among large refiners, though its C-suite size is comparable.
C-suite size
Reporting depth
Marathon Petroleum Corporation
2 levels
4 levels
4 levels
Exxon Mobil
5 levels
5 levels
Avg C-suite tenure
Has COO / Has CAIO
Marathon Petroleum Corporation — no COO — no CAIO
Exxon Mobil — no COO — no CAIO
Current signals
What changed recently
Leadership changes centered on the retirement of the executive chairman and the CEO assuming the chair role.
- new
- promoted
- departed
Leadership Timeline
Year-over-year executive structure based on SEC proxy and annual filings.
FY2025
DEF 14A filed 2026-03-16
- CEO
- Maryann T. Mannen
- CEO span
- 4
- C-suite
- 6
- Avg tenure
- 4 yr
Transition year with announced retirements and CFO succession.
Named executive officers (5)
- Maryann T. Mannen - President and CEO since 2022
- Michael J. Hennigan - Executive Chairman since 2024
- John J. Quaid - EVP and CFO
- Rick D. Hessling - Chief Commercial Officer
- Molly R. Benson - Chief Legal Officer
Frequently Asked Questions
Who is the CEO of Marathon Petroleum?
Maryann T. Mannen has served as President and CEO since 2022.
What type of organizational structure does Marathon Petroleum use?
The company uses a divisional structure typical of large downstream energy companies.
How many direct reports does Marathon Petroleum's CEO have?
The CEO has four direct executive reports.
How has Marathon Petroleum's leadership changed recently?
In late 2025, the executive chairman retired and the CEO assumed the chair role, while a new CFO was appointed.
Does Marathon Petroleum have a COO?
No, Marathon Petroleum does not currently have a standalone Chief Operating Officer role.
Sources
- 8-K Filing, Dec 2025
- 8-K Filing, Nov 2025
- SEC EDGAR: Marathon Petroleum Corporation DEF 14A Proxy Statement
- SEC EDGAR: Marathon Petroleum Corporation 10-K Annual Report
Reference
Cite this page
If you reference this page in research, analysis, or news writing, use one of the formats below. Citation includes the SEC filing source where applicable.
APA 7th
Creately. (2026). Marathon Petroleum Corporation organizational structure. Creately. Retrieved , from https://creately.com/org-chart/fortune-500/marathon-petroleum/MLA 9th
"Marathon Petroleum Corporation Organizational Structure." Creately, April 1, 2026, https://creately.com/org-chart/fortune-500/marathon-petroleum/. Accessed .Chicago 17
Creately. "Marathon Petroleum Corporation Organizational Structure." Last modified April 1, 2026. https://creately.com/org-chart/fortune-500/marathon-petroleum/.Original SEC source View on SEC ↗
Marathon Petroleum Corporation. DEF 14A. Filed 2026-03-16. U.S. Securities and Exchange Commission. https://www.sec.gov/Archives/edgar/data/1510295/000151029526000023/mpc-20260316.htmPermanent URL: https://creately.com/org-chart/fortune-500/marathon-petroleum/ · last updated 2026-04-01