| MPC Investment LLC +4 co-filersDirector, 10% owner, Director · 3 transactions | — | 722.37M†as of Feb 2018 | 418.08M | — | — |
| Andeavor LLC +9 co-filers10% owner, Director, 10% owner · 4 transactions | — | 647.42Mas of Jul 2020 | 161.38M | — | — |
| Marathon Petroleum Corp +1 co-filerDirector, 10% owner · 4 transactions | — | 647.42Mas of Jul 2020 | 161.38M | — | — |
| MPC Investment LLC +3 co-filersDirector, 10% owner, Director, 10% owner · 5 transactions | — | 108.02M†as of Mar 2016 | 71.07M | — | — |
| Markwest Hydrocarbon L.L.C. +5 co-filersDirector, 10% owner · 3 transactions | — | 86.62M†as of Sep 2016 | 28.55M | — | — |
| Semple Frank MDirector · 88 transactions | — | 555.2K† | 773.2K | — | 218.0K |
| Mollenkopf John CExec VP and COO · 2 transactions | — | 413.5Kas of Dec 2015 | 413.5K | — | — |
| Goff Gregory JamesDirector · 4 transactions | — | 385.2Kas of Dec 2019 | 377.8K | — | — |
| Hennigan Michael JExecutive Chairman, Director · 40 transactions | — | 359.1K | 546.4K | — | — |
| Heminger Gary R.Director · 56 transactions | — | 307.5K†as of Mar 2020 | 244.2K | 138.3K | — |
| Buese NancyExec VP and CFO · 5 transactions | — | 187.8Kas of Sep 2016 | 202.8K | — | 20.0K |
| Nickerson Randy SExec VP and CCO · 9 transactions | — | 177.6Kas of Mar 2017 | 17.9K | — | 90.0K |
| Mannen Maryann T.Chairman, President & CEO, Director · 18 transactions | — | 165.5K | 211.8K | — | — |
| Peiffer Garry L.Director · 103 transactions | — | 136.1K† | 77.3K | 63.3K | — |
| Sandman Dan DDirector · 87 transactions | — | 127.5Kas of Apr 2023 | 46.9K | 80.6K | — |
| Bromley C CorwinExec. VP and Gen Counsel · 14 transactions | — | 121.2Kas of Sep 2017 | 153.9K | — | 30.0K |
| Templin Donald C.Director · 44 transactions | — | 99.5K†as of Nov 2021 | 139.1K | 18.0K | — |
| Floerke Gregory ScottExec. VP and COO · 66 transactions | — | 97.2K | 159.4K | — | 32.0K |
| Surma John PDirector · 109 transactions | — | 93.4K | 85.9K | 15.0K | — |
| Helms Christopher ADirector · 108 transactions | — | 84.4K | 73.4K | 11.0K | — |
| Gagle SuzanneGeneral Counsel · 33 transactions | — | 67.2Kas of Dec 2023 | 82.3K | — | — |
| Stice J MichaelDirector · 64 transactions | — | 57.7K† | 56.4K | — | — |
| Quaid John JDirector · 18 transactions | — | 56.1Kas of Mar 2025 | 47.3K | — | — |
| Beall Pamela K.M.Director · 42 transactions | — | 53.2K†as of Dec 2021 | 54.8K | 10.0K | — |
| Beatty Michael LDirector · 45 transactions | — | 51.7Kas of Apr 2021 | 51.7K | — | — |
| Benson Molly RChief Legal Ofc & Corp Sec · 14 transactions | — | 48.4K | 25.7K | — | — |
| Rosson Paula LSenior VP and CAO · 5 transactions | — | 45.5Kas of Apr 2017 | 59.0K | — | 12.3K |
| Griffith Timothy T.Director · 29 transactions | — | 28.4Kas of Mar 2019 | 37.9K | 7.0K | — |
| Lyon Shawn MSenior VP, Log. & Storage · 14 transactions | — | 28.3K | 26.7K | 4.0K | — |
| Aydt Timothy JExec. VP and Chief Comm Ofc. · 13 transactions | — | 27.2Kas of Mar 2022 | 19.0K | — | — |
| Wilder J. MichaelVP, General Counsel & Sec · 7 transactions | — | 26.6K†as of Mar 2015 | 5.0K | 22.5K | — |
| Daberko David A.Director · 45 transactions | — | 23.9Kas of Apr 2018 | 13.9K | 10.0K | — |
| Swearingen John SExec VP, Logistics & Storage · 26 transactions | — | 23.3Kas of Mar 2020 | 29.0K | — | — |
| Wilson C. RichardDirector · 44 transactions | — | 20.6Kas of Nov 2017 | 10.6K | 10.0K | — |
| Hagedorn Carl KristopherExec VP & Chief Fin Ofc, Director · 20 transactions | — | 20.4K | 26.7K | — | 4.0K |
| Kaczynski ThomasSenior VP, Finance & Treasurer · 14 transactions | — | 18.1Kas of Dec 2022 | 10.4K | — | — |
| Breves Christine SDirector · 27 transactions | — | 14.4K | 14.4K | — | — |
| Khoury Maria ADirector · 1 transaction | — | 8.5K | 8.5K | — | — |
| Shaffner George P.VP and Chief Operating Officer · 7 transactions | — | 6.5Kas of Mar 2015 | 3.5K | 4.0K | — |
| Braddock Michael G.VP and Chief Acct. Officer · 4 transactions | — | 5.8Kas of Mar 2014 | 1.9K | 4.0K | — |
| Pierson Craig O.Vice President, Operations · 12 transactions | — | 5.0Kas of Apr 2016 | 1.9K | 3.3K | — |
| Walker Ray N JRDirector · 5 transactions | — | 4.1K | 4.1K | — | — |
| Feldman Ian DController · 1 transaction | — | 52as of Apr 2015 | 52 | — | — |
| Andeavor LLC +7 co-filers10% owner, Director, 10% owner · 1 transaction | — | 0as of Feb 2021 | — | — | — |