Marathon Petroleum Corporation 401(k): Fidelity, match 7.02% max
Marathon Petroleum Thrift Plan · MPC · CIK 1510295
Fidelity Investments is the recordkeeper named on the Form 5500 filed for this plan, the company that keeps the account records. Where to log in, and what the filing says.
Maximum employer match, as a share of pay
7.02%
Marathon Petroleum Corporation matches 117% of the first 6% of pay.
From the Form 11-K filed June 25, 2026 ↗, covering the plan year ended December 31, 2025. Page data last updated July 28, 2026, when the Form 5500 bulk data was last refreshed. Why filings lag
On this page: what the employer actually paid in · the formula, word for word · when the money becomes yours · who can join · who holds your account · what the plan reports to the DOL · how it compares · what to do next
What Marathon Petroleum puts in, and what the plan costs
What Marathon Petroleum put into the plan, per active participant
$9,840
Marathon Petroleum Corporation put $9,840 into this plan for each of its 18,320 active participants in plan year 2024. This is the whole employer side of the plan: matching money, profit sharing, non-elective and safe-harbor contributions, and reallocated forfeitures. The Form 5500 does not separate them, so this is what the employer put in and not the match.
Marathon Petroleum put in more per active participant than 73% of plans with 5,000+ participants in oil, gas and mining. The middle plan in that group of 31 reported $7,448. Oil, gas and mining comes from business code 324110, which Marathon Petroleum entered on its own Form 5500. Sponsors pick that code themselves, so a code that does not describe what the employer does ranks the plan against the wrong companies.
What this figure cannot separate: how much Marathon Petroleum pays, and how much it puts in
This is dollars, not a rate. A Form 5500 carries no payroll, so the figure reflects both how much the employer puts in and how much the employer pays: two plans running the same formula report different amounts when one pays better. Crossing the peer group with industry holds most of that difference still, and none of it disappears.
This is one plan year, not an average. A true-up, a plan merger or a one-off contribution moves a single year on its own.
Source: DOL Form 5500 for the plan year ended December 31, 2024, EIN 311537655, plan 010 · DOL EFAST2 ↗
The $9,840 above is the Form 5500 figure for plan year 2024, and it counts every employer dollar on one line. Marathon Petroleum Corporation also files a Form 11-K, which states the match formula for plan year 2025: the card below reads $3,475 a year at a $49,500 salary. That second figure is what the formula pays one worker on that salary, and not an amount either filing reports. The two figures cover different plan years and measure different things, so neither one is the other one corrected.
What Marathon Petroleum puts in
$3,475
a year, at a $49,500 salary.
The match paragraph, word for word
“The Company makes matching contributions on eligible participant contributions up to a maximum of 6% of eligible pay at the rate of $1.17 per dollar contributed.”
What you contribute to collect all of it
Contribute at least 6% of your pay to collect the full match.
That is $2,970 a year at a $49,500 salary, and it scales with your own.
Vesting score
100 out of 100
How fast the employer’s money becomes yours. Higher than 48% of the 369 schedules we have scored.
It measures vesting speed and nothing else. It says nothing about the size of the match, what the plan charges, or the funds inside it.
Share of the employer's money that is the worker's at hire and at each of the first 6 anniversaries: 100%, 100%, 100%, 100%, 100%, 100%, 100%. The score is the average of those 7 readings.
Vesting, word for word
“Participants are fully and immediately vested in their contributions and Company matching contributions made on or after January 1, 2016, plus actual earnings thereon.”
The wait before the match starts and the year-end true-up appear above when the filing states them. Neither is part of the score, and a filing that is silent on one of them is not a plan without it.
What the plan costs, against plans of its size
56th percentile
$61.30 per participant in plan-paid administrative cost, more expensive than 56% of plans with 5,000+ participants.
What is Marathon Petroleum's 401(k) match formula?
Marathon Petroleum's 401(k) employer match tops out at 7.02% of pay. One rate up to one limit is the commonest of the four shapes a match formula takes.
| Match formula | 117% of the first 6% of pay |
|---|---|
| Maximum employer match | 7.02% of compensation |
| Conditions | Match is credited at the rate of $1.17 per dollar contributed on eligible participant contributions up to a maximum of 6% of eligible pay. Effective January 1, 2024, qualified student loan payments during a Plan Year are treated as elective deferrals eligible for matching contributions |
At a $90,000 salary, contributing 6% ($5,400) earns the full employer match of $6,318 for the year.
What the filing says, word for word
“The Company makes matching contributions on eligible participant contributions up to a maximum of 6% of eligible pay at the rate of $1.17 per dollar contributed.”
Source: Form 11-K filed June 25, 2026, SEC EDGAR, corroborated by the filing's inline-XBRL facts · SEC ↗
What is Marathon Petroleum's 401(k) vesting schedule?
Marathon Petroleum vests the employer match immediately: 100% is yours as soon as it is paid in. Nothing is forfeited when you leave, which is not true of the two schedules that vest over time.
| Employer match vesting | Immediate: employer match is 100% vested when contributed |
|---|---|
| Your own contributions | Immediate: always 100% yours |
| Accelerated vesting | Applies to matching contributions made on or after January 1, 2016. Pre-2016 matching contributions became fully vested effective August 1, 2024 for participants actively employed on that date; other participants vest at the earliest of retirement under the Marathon Petroleum Retirement Plan, death or disability while actively employed, three years of service, attainment of age 65 while actively employed, or Plan termination |
| Other employer contributions | Legacy employer contributions from the merged Andeavor 401(k), Andeavor Retail 401(k), and Speedway nonelective accounts remain subject to the separate vesting schedules incorporated from those plans |
Vesting, word for word
“Participants are fully and immediately vested in their contributions and Company matching contributions made on or after January 1, 2016, plus actual earnings thereon.”
Source: Form 11-K filed June 25, 2026, SEC EDGAR · SEC ↗
Who can join Marathon Petroleum's 401(k), and is enrollment automatic?
Marathon Petroleum enrolls new hires automatically; the filing does not state the default deferral rate.
| Plan entry | Employees of Marathon Petroleum Company LP and other related employers authorized to participate; eligible employees may participate by electing to make contributions |
|---|---|
| Automatic enrollment | Yes: |
Eligibility, word for word
“The Plan generally covers employees of the Company and other related employers that the Company has authorized to participate in the Plan. Eligible employees may participate in the Plan by electing to make contributions in accordance with procedures established by the Plan Administrator.”
Automatic enrollment, word for word
“Effective April 8, 2024, newly hired and rehired eligible employees are automatically enrolled in the Plan, unless they affirmatively opt-out of making contributions.”
Source: Form 11-K filed June 25, 2026, SEC EDGAR · SEC ↗
Who holds your account
Schedule C of the Form 5500 filed for plan year 2024 reports Fidelity Investments, filed as “FIDELITY INVESTMENTS INSTITUTIONAL”. That is the company paid to keep the account records: what is in an account, what went into it, and usually the site a participant signs in to. The trustee that holds the plan’s assets can be a different company, and this filing does not name it.
10,593 plans on file name Fidelity Investments as their recordkeeper. Of those, the 10,022 with a computable fee have a median plan-paid cost of $97.71 per participant.
Participants log in at Fidelity NetBenefits ↗. 401(k) Monitor is not affiliated with Fidelity Investments or with any other recordkeeper, and takes nothing for this link. It is here because that is where the account is.
| Recordkeeper | Fidelity Investments |
|---|---|
| Recordkeeper EIN | 042647786 |
What does the Marathon Petroleum plan report on Form 5500?
The Marathon Petroleum plan reported $8.3B in assets and 28,940 participants for plan year 2024.
| Total plan assets | $8,325,133,144 |
|---|---|
| Participants | 28,940 |
| Plan-paid admin cost per participant | $61.30 |
How that cost compares
This plan pays $61.30 per participant. The median across plans in oil, gas and mining is $124.28, from the 618 of 653 whose Form 5500 yields a per-participant cost.
Marathon Petroleum Thrift Plan on its Form 5500 filing: fees, providers and financials
How does Marathon Petroleum's 401(k) match compare?
Marathon Petroleum Corporation's maximum 401(k) match of 7.02% of pay compares with a median of 4% across the 269 companies in our data with a computable formula.
Employers worth reading next
Of the six employers below, three file in oil, gas and mining, two report the same recordkeeper and one vests on the same schedule.
Maximum match 7% of pay. Also in oil, gas and mining.
Maximum match 7.98% of pay. Also in oil, gas and mining.
Maximum match 7% of pay. Also in oil, gas and mining.
Maximum match 7% of pay. Same recordkeeper, Fidelity Investments.
Maximum match 7% of pay. Same recordkeeper, Fidelity Investments.
Maximum match 4% of pay. Vests immediately too, like Marathon Petroleum.
Compare Marathon Petroleum Corporation with any company, side by side
What can you do next?
- Read the Form 11-K on SEC EDGAR ↗
Form 11-K filed June 25, 2026, SEC EDGAR. Every match fact on this page comes from it.
- Changed jobs? Find an old 401(k) ↗
The Department of Labor's Retirement Savings Lost & Found, a free government database.
- This year's IRS contribution limits ↗
The official deferral and catch-up limits every formula operates under.
Questions this filing answers
What is Marathon Petroleum Corporation's 401(k) match?
Marathon Petroleum Corporation matches 117% of employee contributions up to 6% of eligible pay (plan year ended December 31, 2025).
When does the Marathon Petroleum Corporation 401(k) match vest?
Immediate: employer match is 100% vested when contributed.
Does Marathon Petroleum Corporation's 401(k) plan have automatic enrollment?
Yes: .
Who is the recordkeeper for Marathon Petroleum Corporation's 401(k)?
Fidelity Investments is named as the recordkeeper on the Form 5500 filed for Marathon Petroleum Thrift Plan for plan year 2024. That is the company paid to keep the account records: what is in an account, what went into it, and usually the site a participant signs in to.
Source
The match formula, the vesting schedule and the enrollment rules on this page were read from one document: the Form 11-K annual report that Marathon Petroleum Corporation filed with the US Securities and Exchange Commission for the plan year ended December 31, 2025. Each of those fields carries the filing sentence it was read from, expandable where the field appears. Nothing on this page was supplied by the employer to this site.
The plan assets, the participant counts, the plan-paid fees and the recordkeeper come from a different document, the plan’s DOL Form 5500 annual return, and the section that reports them links it. Comparisons with other employers are computed across the filings named in the section they appear in.
Read the filing on SEC EDGAR ↗
| Document | Form 11-K annual report |
|---|---|
| Filed with | US Securities and Exchange Commission (EDGAR) |
| Filed by | Marathon Petroleum Corporation |
| SEC CIK | 1510295 |
| Accession number | 0001510295-26-000052 |
| Plan | Marathon Petroleum Thrift Plan |
| Period of report | December 31, 2025 |
| Filed | June 25, 2026 |
401(k) Monitor is not affiliated with Marathon Petroleum Corporation, with the Securities and Exchange Commission or with this plan’s recordkeeper, and publishes this page without their involvement. It republishes a public filing and says where it came from.
Cite this page
401(k) Monitor, “Marathon Petroleum Corporation 401(k) plan facts”, from SEC Form 11-K accession 0001510295-26-000052, plan year ended December 31, 2025.
