401(k) · DOL Form 5500 · 2023

Marathon Petroleum Company LP 401(k) Plan

Data updated 2026-08-25

$7.5B
Total assets Very large vs avg
17,818
Participants Very large workforce
100th
Percentile by assets National rank
$421,740
Avg per participant High balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Marathon Petroleum Thrift Plan · Sponsored by Marathon Petroleum Company LP · Ohio · Manufacturing

$7.5B in assets, 17,818 participants

Marathon Petroleum Company LP's Marathon Petroleum Thrift Plan reported $7.5B in total assets and 17,818 participants in its 2023 DOL Form 5500 filing, ranking in the 100th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #18,645 in Manufacturing (18,722 peers)

Coverage in Ohio

Marathon Petroleum Thrift Plan covers 17,818 participants in Ohio, 23x the typical Ohio plan (state average ~765 per filing). Assets: $7.5B.

#18,645
in Manufacturing (18,722 peers)
+17.9%
assets growth YoY
75×
vs typical plan assets (national mean)

Marathon Petroleum Thrift Plan's outsized position by total assets

Marathon Petroleum Thrift Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$7,514,568,027 Highest reported value at or above every one of 127,068 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

Marathon Petroleum Thrift Plan's mega-plan peer group by participant headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Marathon Petroleum Thrift Plan is a mega filing (17,818 participants), the rightmost band on the breakdown.

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Marathon Petroleum Thrift Plan reported net income rose from -$791M in the plan year 2022 filing to $1.1B in the plan year 2023 filing.
  • Marathon Petroleum Thrift Plan end-of-year assets rose from $6.4B in the plan year 2022 filing to $7.5B in the plan year 2023 filing.
  • Marathon Petroleum Thrift Plan reported participants rose from 17,666 in the plan year 2022 filing to 17,818 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 311537655 · Marathon Petroleum Company LP PY 2023 · 401(k)

Marathon Petroleum Thrift Plan · $7.5B · 17,818 · 100th

  • 5500 $7.5B
  • ASSETS 17,818
  • PCT 100th
  • EIN 401(k)
  • RANK near Thermo Fisher Scientific Inc. 401(k) Retirement Plan
  • PHOTO ind #18645

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Manufacturing retirement plans → · Plans in Ohio →

Marathon Petroleum Thrift Plan in the asset neighbourhood

Warner Bros. Discovery 401(k) Savings PlanWarner Bros. Discovery 401(k…$7.6BSap America, Inc. 401(k) Plan$7.5BMarathon Petroleum Thrift PlanMarathon Petroleum Thrift Pl…$7.5BThermo Fisher Scientific Inc. 401(k) Retirement PlanThermo Fisher Scientific Inc…$7.5BDeferred Salary Plan of the Electrical IndustryDeferred Salary Plan of the …$7.5B
End-of-year total assets ($B) among Marathon Petroleum Thrift Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Ohio filing particulars

Total Assets (Beginning of Year)$6.4B
Net Assets (End of Year)$7.5B
Net Income$1.1B
Employer EIN311537655
Plan Effective Date2011-07-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Marathon Petroleum Company LP)

Sponsor-wide plan assets over time

All Marathon Petroleum Company LP plans reported in each filing year

Latest sponsor-wide plan assets
$10.7B 25.710409990260658% vs 2022
2024 filing year
$8B$9B$10B$11B 202220232024 $8.48B $10.7B ▲ +25.7%
Year Plans Participants Total Assets
2022 3 35,136 $8.5B
2023 3 35,428 $9.7B
2024 3 36,178 $10.7B

Nearby 401(k) Plans in Ohio

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Marathon Petroleum Thrift Plan vs. nearby 401(k) plans in Ohio, assets vs. participants Scatter plot of 6 data points. 050000100000150000 510152025 Total assets ($B) Participants Marathon Petroleum Thrift Plan, Total assets ($B): 7.514568027 · Participants: 17818Marathon Petroleum Thrift PlanGE Retirement Savings Plan, Total assets ($B): 19.485469047 · Participants: 59766GE Retirement Savings PlanThe Sherwin-Williams Company 401(k) Plan, Total assets ($B): 10.12932701 · Participants: 47362The Sherwin-Williams Company 401(k) PlanThe Progressive 401(k) Plan, Total assets ($B): 9.225573063 · Participants: 56176The Progressive 401(k) PlanThe Kroger Co. 401(k) Retirement Savings Account Plan, Total assets ($B): 8.445085 · Participants: 129769The Kroger Co. 401(k) Retirement Savings Account PlanNationwide Savings Plan, Total assets ($B): 7.618883027 · Participants: 24715Nationwide Savings Plan
Marathon Petroleum Thrift Plan vs. nearby 401(k) plans in Ohio, assets vs. participants
Compare Marathon Petroleum Thrift Plan side-by-side with 3 peers →

Scale composition for Marathon Petroleum Thrift Plan

Marathon Petroleum Thrift Plan reports $7.5B in end-of-year assets across 17,818 participants (0.061% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.019% of 93,925,755 covered participants) - about $421,740 per participant (3.1x the national average assets-per-participant) . Net income for plan year 2023 was $1.1B.

This plan identity (EIN 311537655, plan #010) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $6.4B to $8.3B (+30.7%) while covered participants moved from 17,666 to 18,199 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 17,666 $6.4B Open filing
2023 17,818 $7.5B This page
2024 · index core 18,199 $8.3B Open filing

The same sponsor also keeps 3 other index-core plans on PlainRetire:

Marathon Petroleum Thrift Plan's out-of-state 401(k) peers by assets and headcount

Outside Ohio, the nearest 401(k) by assets is Thermo Fisher Scientific Inc. 401(k) Retirement Plan in PA ($7.5B); by covered participants it is McKinsey & Company, Inc. (Psrp) Profit Sharing Retirement Plan in NY (17,796 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($7.5B here).

Similar participant headcount

Nearest other-state filings by covered participants (17,818 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Marathon Petroleum Thrift Plan assets move in 2023? ▼
Marathon Petroleum Thrift Plan grew sharply - up 17.9% during 2023, from $6.4B to $7.5B. Reported net income was $1.1B.
How have Marathon Petroleum Company LP plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Marathon Petroleum Company LP's sponsor-wide assets grew 25.7%, from $8.5B to $10.7B.
Where does Marathon Petroleum Thrift Plan rank by assets among Form 5500 filers? ▼
Marathon Petroleum Thrift Plan ranks in the 100th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (among the largest 1% of all filed plans).
Which 401(k) plans are similar in size to Marathon Petroleum Thrift Plan? ▼
Among 401(k) plans in other states, the closest by assets is Thermo Fisher Scientific Inc. 401(k) Retirement Plan in PA ($7.5B, 41,102 participants).
Which 401(k) plans cover a similar participant headcount to Marathon Petroleum Thrift Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is McKinsey & Company, Inc. (Psrp) Profit Sharing Retirement Plan in NY (17,796 participants, $9.1B in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 311537655.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.