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Marathon Petroleum Corp

For the period ended Mar 31, 2025. Filed May 6, 2025.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2025 · Filed May 6, 2025

MPC$389.55-0.1%Stored close · as of Nov 10, 2026

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21. Pension and Other Postretirement Benefits

  1. Pension and Other Postretirement Benefits

The following summarizes the components of net periodic benefit costs:

Three Months Ended March 31,
(Millions of dollars)20252024
Pension Benefits
Service cost$55$54
Interest cost3730
Expected return on plan assets(37)(37)
Amortization of prior service credit(2)(8)
Amortization of actuarial loss41
Net periodic pension benefit cost$57$40
Other Benefits
Service cost$5$5
Interest cost98
Amortization of prior service credit(6)(5)
Net periodic other benefit cost$8$8

The components of net periodic benefit cost, other than the service cost component, are included in net interest and other financial costs on the consolidated statements of income.

During the three months ended March 31, 2025, we made contributions of $36 million to our funded pension plans. Benefit payments related to unfunded pension and other postretirement benefit plans were $3 million and $12 million, respectively, during the three months ended March 31, 2025.

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