Company Atlasby KadoaStar on GitHub

Marathon Petroleum MPC

Marathon Petroleum is the 95th largest S&P 500 company by market cap, worth $128 billion. 11 directors have filed with the SEC in the last 12 months (who counts), 1 of them an executive. 7 other officers are on file. At 30 Jun 2026, Vanguard was its largest institutional holder, with 13.0% of the company.

Chair and CEO
Maryann T. Mannen
Sector
Energy
Sub-industry
Oil & Gas Refining & Marketing
Headquarters
Findlay, Ohio
Founded
1887
More
Wikipedia
Market cap
$128B
95th largest, 23 Oct 2026 close
Revenue
$133B
Fiscal year 2025
Price to sales
1.0
Market cap over revenue
Employees
18,500
10-K, 31 Dec 2025
Market cap per employee
$6.9M
Market cap over employees
Connections
11
S&P 500 companies sharing a director or officer

Largest institutional holders

Each fund group's share of Marathon Petroleum. Where a company has several share classes, the share is of its total value.

13F filings for the quarter to 30 Jun 2026

These five hold 33.1% of Marathon Petroleum.

Source: SEC Form 13F data sets, SEC XBRL shares outstanding 路 All holders

Board and officers

9 people here also hold roles at other S&P 500 companies.

Roles filed up to 30 Sep 2026

NameTitle
Directors (11)
Maryann T. MannenChairman, President & CEOAlso at Prudential FinancialChairman, President & CEO
Evan BayhDirectorAlso at Fifth Third BancorpDirector
Jeffrey C. CampbellDirectorAlso at AonDirector
Jonathan Z. CohenDirectorAlso at Norwegian Cruise Line HoldingsDirector
Kimberly N. Ellison-TaylorDirectorAlso at U.S. BancorpDirector
Abdulaziz Fahd Al KhayyalDirectorAlso at HalliburtonDirector
Eileen P. PatersonDirectorAlso at Constellation EnergyDirector
Kim K.W. RuckerDirectorAlso at GE Vernova and HPDirector
Frank M. SempleDirectorDirector
J. Michael SticeDirectorDirector
John P. SurmaDirectorAlso at Public Service Enterprise Group and Trane TechnologiesDirector
Officers (7)
Molly R. BensonChief Legal Ofc & Corp SecLast filed 19 Aug 2026Chief Legal Ofc & Corp Sec
Erin M. BrzezinskiVP and ControllerLast filed 31 Aug 2026VP and Controller
Gregory Scott FloerkeEx VP & COO, MPLX GP LLCLast filed 3 Mar 2026Ex VP & COO, MPLX GP LLC
Michael A. Henschen IIEx VP, RefiningLast filed 14 Aug 2026Ex VP, Refining
Ricky D. HesslingChief Commercial OfficerLast filed 15 May 2026Chief Commercial Officer
Maria A. KhouryExec VP & Chief Fin OfcLast filed 3 Mar 2026Exec VP & Chief Fin Ofc
Shawn M. LyonSVP Log & Storage, MPLX GP LLCLast filed 1 Sep 2026SVP Log & Storage, MPLX GP LLC

Source: SEC insider filings (Forms 3, 4 and 5), Marathon Petroleum's Form 4 filings 路 All directors and officers

Companies that share people with Marathon Petroleum

Each person's title here, then at the other company.

Source: SEC insider filings 路 See the whole network

Marathon Petroleum's market cap since July 2011

Marked weeks are changes in the share count, such as a merger, not market moves.

Weekly, up to 23 Oct 2026

Show equal percentage changes as equal steps.
20122014201620182020202220242026$128B

Source: Yahoo Finance closing prices, SEC XBRL shares outstanding

Workforce

Headcount at 31 Dec 2025

Employees
18,500
As of December 31, 2025, we employed approximately 18,500 people in full-time and part-time roles.
Marathon Petroleum Form 10-K

Source: Marathon Petroleum Form 10-K

Insider trades

Open-market buys and sales by directors and officers. Grants, option exercises and shares withheld for tax are left out.

Trades from 30 Sep 2025 to 30 Sep 2026

Directors and officers sold $13.9 million of stock in 12 sales and made no open-market purchases in the 12 months to 30 Sep 2026.

DatePersonTitleTypeSharesValue
31 Aug 2026SaleShawn M. LyonSVP Log & Storage, MPLX GP LLCSVP Log & Storage, MPLX GP LLCSale1,000$376K
28 Aug 2026SaleShawn M. LyonSVP Log & Storage, MPLX GP LLCSVP Log & Storage, MPLX GP LLCSale425$157K
27 Aug 2026SaleErin M. BrzezinskiVP and ControllerVP and ControllerSale570$207K
17 Aug 2026SaleMolly R. BensonChief Legal Ofc & Corp SecChief Legal Ofc & Corp SecSale17,196$6.2M
13 Aug 2026SaleShawn M. LyonSVP Log & Storage, MPLX GP LLCSVP Log & Storage, MPLX GP LLCSale2,500$875K
12 Aug 2026SaleMichael A. Henschen IIEx VP, RefiningEx VP, RefiningSale6,011$2.1M
4 Jun 2026SaleMichael A. Henschen IIEx VP, RefiningEx VP, RefiningSale6,336$1.7M
13 May 2026SaleRicky D. HesslingChief Commercial OfficerChief Commercial OfficerSale1,000$250K
13 Mar 2026SaleRicky D. HesslingChief Commercial OfficerChief Commercial OfficerSale1,626$371K
12 Mar 2026SaleRicky D. HesslingChief Commercial OfficerChief Commercial OfficerSale1,037$238K

Showing 10 of 12 trades

Source: SEC insider transactions data sets, Marathon Petroleum's Form 4 filings

Trades by members of Congress and officials

Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.

Trades from 20 Oct 2023 to 20 Oct 2026

5 people disclosed 3 purchases and 10 sales of Marathon Petroleum stock since October 2023.

DateMember or officialTypeAmount
22 Sep 2026David J. Taylor (House, R-OH)House, R-OH 路 SoldSale$1,001 to $15,000$1K to $15K
24 Jul 2026David J. Taylor (House, R-OH)House, R-OH 路 SoldSale$1,001 to $15,000$1K to $15K
11 Mar 2026David J. Taylor (House, R-OH)House, R-OH 路 SoldSale$1,001 to $15,000$1K to $15K
26 Feb 2026David J. Taylor (House, R-OH)House, R-OH 路 SoldSale$1,001 to $15,000$1K to $15K
14 Aug 2025David J. Taylor (House, R-OH)House, R-OH 路 BoughtPurchase$1,001 to $15,000$1K to $15K
18 Jul 2025David J. Taylor (House, R-OH)House, R-OH 路 SoldSale$1,001 to $15,000$1K to $15K
15 May 2025Rob Bresnahan (House, R-PA)House, R-PA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
12 May 2025Jefferson Shreve (House, R-IN)House, R-IN 路 SoldSale$15,001 to $50,000$15K to $50K
11 Apr 2025Dan Newhouse (House, R-WA)House, R-WA 路 SoldSale$1,001 to $15,000$1K to $15K
8 Apr 2025Rob Bresnahan (House, R-PA)House, R-PA 路 SoldSale$1,001 to $15,000$1K to $15K

Showing 10 of 13 trades

Source: House, Senate and OGE disclosures via the Congress trading monitor

Not on file: no WARN layoff notices under its own name since October 2023.