secwatch / observer
MPC Marathon Petroleum Corp
CIK 0001510295 25 ready 8-Ks latest May 5, 2026, 7:59 PM ET RSS · JSON
Activity: QUIET 0 filings / 30d vs 1 baseline
Ready 8-Ks 25
Latest filing May 5, 2026, 7:59 PM ET
Top materiality 0.90
Event mix earnings ×10 · leadership ×10 · other_material ×3
Sentiment 4 pos · 6 neg · 15 neu
Latest earnings reported 2026-Q1
Executive change recent →

Recent 8-K filings for MPC

Executive changes

Departed

Timothy J. Aydt

Executive Vice President, Refining
MPC · Marathon Petroleum Corp
Effective
2025-09-02
Successor
Mike Henschen
Filed
April 30, 2025, 7:59 PM ET
Timothy J. Aydt, Executive Vice President, Refining, of Marathon Petroleum Corporation (the “Company”), notified the Company of his intention to retire from the Company, following over 40 years of service, effective September 2, 2025.
Appointed

Mike Henschen

Executive Vice President, Refining
MPC · Marathon Petroleum Corp
Effective
2025-06-01
Filed
April 30, 2025, 7:59 PM ET
The Company has announced that Mike Henschen will succeed Mr. Aydt as Executive Vice President, Refining, effective June 1, 2025.
Departed

Susan Tomasky

Director
MPC · Marathon Petroleum Corp
Effective
2025-04-30
Filed
January 24, 2025, 6:59 PM ET
On January 20, 2025, Susan Tomasky notified the Board of Directors (the "Board") of Marathon Petroleum Corporation (the “Company”) of her decision to retire from the Board effective upon the conclusion of the Company's 2025 annual meeting of shareholders, to be held April 30, 2025.
Appointed

Jeffrey C. Campbell

director
MPC · Marathon Petroleum Corp
Effective
2024-11-11
Filed
October 31, 2024, 7:59 PM ET
On October 30, 2024, the Board of Directors (the “Board”) of Marathon Petroleum Corporation (the “Company”) increased the size of the Board to fifteen members and elected Jeffrey C. Campbell as a director of the Company, with such increase in the size of the Board and election effective as of November 11, 2024.
Role change

John P. Surma

Lead Director
MPC · Marathon Petroleum Corp
Effective
2024-08-01
Filed
May 13, 2024, 7:59 PM ET
current Chairman of the Board John P. Surma has been elected Lead Director.
Appointed

Maryann T. Mannen

President and Chief Executive Officer of MPLX
MPC · Marathon Petroleum Corp
Effective
2024-08-01
Filed
May 13, 2024, 7:59 PM ET
effective August 1, 2024, has been appointed as the President and Chief Executive Officer of MPLX.
Appointed

Maryann T. Mannen

Director
MPC · Marathon Petroleum Corp
Effective
2024-08-01
Filed
May 13, 2024, 7:59 PM ET
the Board increased the size of the Board to fourteen members and elected Ms. Mannen as a director of the Company, with such increase and election effective August 1, 2024.
Appointed

Maryann T. Mannen

Chief Executive Officer
MPC · Marathon Petroleum Corp
Effective
2024-08-01
Filed
May 13, 2024, 7:59 PM ET
On May 11, 2024, the board of directors (the “Board”) of Marathon Petroleum Corporation (the “Company”) appointed Maryann T. Mannen as Chief Executive Officer of the Company, effective August 1, 2024.
Appointed

Kimberly N. Ellison-Taylor

Director
MPC · Marathon Petroleum Corp
Effective
2024-03-01
Filed
January 31, 2024, 6:59 PM ET
On January 26, 2024, the Board of Directors (the “Board”) of Marathon Petroleum Corporation (the “Company”) increased the size of the Board to thirteen members and elected Ms. Eileen P. Drake and Ms. Kimberly N. Ellison-Taylor as directors of the Company, with such increase in the size of the Board and elections effective as of March 1, 2024.
Appointed

Eileen P. Drake

Director
MPC · Marathon Petroleum Corp
Effective
2024-03-01
Filed
January 31, 2024, 6:59 PM ET
On January 26, 2024, the Board of Directors (the “Board”) of Marathon Petroleum Corporation (the “Company”) increased the size of the Board to thirteen members and elected Ms. Eileen P. Drake and Ms. Kimberly N. Ellison-Taylor as directors of the Company, with such increase in the size of the Board and elections effective as of March 1, 2024.
Departed

C. Kristopher Hagedorn

Senior Vice President and Controller
MPC · Marathon Petroleum Corp
Effective
2024-01-08
Successor
Erin M. Brzezinski
Filed
January 9, 2024, 6:59 PM ET
Ms. Brzezinski is succeeding C. Kristopher Hagedorn, who ceased to serve as Senior Vice President and Controller of the Company effective January 8, 2024.
Appointed

Erin M. Brzezinski

Vice President and Controller
MPC · Marathon Petroleum Corp
Effective
2024-01-08
Filed
January 9, 2024, 6:59 PM ET
Effective January 8, 2024, Marathon Petroleum Corporation (the "Company") appointed Erin M. Brzezinski as Vice President and Controller.

Earnings & guidance

2026-Q1 EPS reported $1.73 filing →

Materiality & sentiment trend

Max materiality 0.90 · Median 0.60 · Most common event earnings

4 positive 6 negative 15 neutral

source · MPC on sec.gov