Maryann T. Seaman

Companies

• Prudential FinancialBoard member May 14, 2026 to now¹
• Marathon PetroleumChair Mar 3, 2026 to now²
• MPLXChair Mar 3, 2026 to now³
• MPLXChief executive officer Mar 4, 2025 to now⁴
• MPLXPresident Mar 4, 2025 to now⁴
• Marathon PetroleumBoard member Aug 5, 2024 to now⁵
• Marathon PetroleumChief executive officer Aug 5, 2024 to now⁵
• Marathon PetroleumPresident Feb 5, 2024 to now⁶
• MPLXBoard member Feb 3, 2021 to now⁷
• Owens CorningBoard member Aug 11, 2014 to now⁸
• Marathon PetroleumExec VP & Chief Fin Ofc Jan 27, 2021 to Mar 3, 2023⁹
• TechnipFMCChief financial officer Jan 17, 2017 to Mar 11, 2020¹⁰
• FMC TechnologiesChief financial officer Apr 27, 2010 to Jan 17, 2017¹¹
• FMC TechnologiesVice President Administration Aug 6, 2007 to Mar 30, 2010¹²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Marathon Petroleum MPC110,939 shares¹³$53.1M at $478.25Aug 3, 2026
• MMPLX MPLX165,459 shares¹⁴$9.6M at $58.19Mar 2, 2026
• Owens Corning OC27,410 shares¹⁵$3.1M at $112.86Apr 9, 2026
• Prudential Financial PRU0 shares¹⁶May 14, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Aug 3, 2026Shares withheld for tax 908 shares at $311.78 of Marathon Petroleum¹³
• Apr 9, 2026Granted 163 shares at $114.95 of Owens Corning¹⁵
• Mar 2, 2026Shares withheld for tax 2,236 shares at $206.30 of Marathon Petroleum¹⁷
• Mar 2, 2026Shares withheld for tax 6,409 shares at $59.22 of MPLX¹⁴
• Mar 2, 2026Shares withheld for tax 778 shares at $206.30 of Marathon Petroleum¹⁷
• Mar 2, 2026Shares withheld for tax 3,404 shares at $59.22 of MPLX¹⁴
• Mar 2, 2026Shares withheld for tax 952 shares at $206.30 of Marathon Petroleum¹⁷
• Mar 2, 2026Shares withheld for tax 3,407 shares at $59.22 of MPLX¹⁴
• Mar 1, 2026Granted 15,266 shares of Marathon Petroleum¹⁷
• Mar 1, 2026Granted 52,817 shares of MPLX¹⁴
• Feb 27, 2026Granted 412 shares at $122.07 of Owens Corning¹⁸
• Jan 21, 2026Granted 147 shares at $124.68 of Owens Corning¹⁹
• Nov 7, 2025Granted 439 shares at $104.20 of Owens Corning²⁰
• Nov 6, 2025Granted 159 shares at $104.94 of Owens Corning²⁰
• Aug 8, 2025Granted 318 shares at $143.88 of Owens Corning²¹
• Aug 7, 2025Granted 111 shares at $147.17 of Owens Corning²²
• Aug 1, 2025Shares withheld for tax 908 shares at $166.39 of Marathon Petroleum²³
• May 9, 2025Granted 335 shares at $136.44 of Owens Corning²⁴
• Apr 10, 2025Granted 119 shares at $134.48 of Owens Corning²⁵
• Mar 3, 2025Shares withheld for tax 778 shares at $148.65 of Marathon Petroleum²⁶
• Mar 3, 2025Shares withheld for tax 3,404 shares at $54.34 of MPLX²⁷
• Mar 3, 2025Shares withheld for tax 952 shares at $148.65 of Marathon Petroleum²⁶
• Mar 3, 2025Shares withheld for tax 3,407 shares at $54.34 of MPLX²⁷
• Mar 3, 2025Shares withheld for tax 1,389 shares at $148.65 of Marathon Petroleum²⁶
• Mar 3, 2025Shares withheld for tax 3,290 shares at $54.34 of MPLX²⁷