401(k) · DOL Form 5500 · 2023

Marathon Oil Company 401(k) Plan

Data updated 2026-08-25

$883M
Total assets Above avg plan size
1,177
Participants Near avg headcount
98th
Percentile by assets National rank
$749,988
Avg per participant High balance/head
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Official DOL plan name: Marathon Oil Company Thrift Plan · Sponsored by Marathon Oil Company · Texas · Mining & Oil Extraction

$883M in assets, 1,177 participants

Marathon Oil Company's Marathon Oil Company Thrift Plan reported $883M in total assets and 1,177 participants in its 2023 DOL Form 5500 filing, ranking in the 98th 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.

  • #791 in Mining & Oil Extraction (811 peers)

Where Marathon Oil Company Thrift Plan sits by assets

Marathon Oil Company Thrift Plan sits in the top 5% of all filed plans by assets, $883M for 1,177 participants (~$749,988/participant), up 5.7% in 2023.

#791
in Mining & Oil Extraction (811 peers)
+5.7%
assets growth YoY
8.9×
vs typical plan assets (national mean)

Marathon Oil Company Thrift Plan's outsized position by total assets

Marathon Oil Company Thrift Plan vs every filed plan by assets

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

$882,736,154 Top 2% higher than 98% 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 Oil Company Thrift Plan's large-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 Oil Company Thrift Plan lands in the large band (1,177 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Marathon Oil Company Thrift Plan reported net income rose from -$223M in the plan year 2022 filing to $47M in the plan year 2023 filing.
  • Marathon Oil Company Thrift Plan reported participants rose from 1,106 in the plan year 2022 filing to 1,177 in the plan year 2023 filing.
  • Marathon Oil Company Thrift Plan end-of-year assets rose from $835M in the plan year 2022 filing to $883M in the plan year 2023 filing.

See the national 2022→2023 release diff →

EBSA filing schedule strip

Filing strip 251410539 · Marathon Oil Company PY 2023 · 401(k)

Marathon Oil Company Thrift Plan · $883M · 1,177 · 98th

  • EIN $883M
  • RANK 1,177
  • PHOTO 98th
  • IND 401(k)
  • EOY near Flightsafety Employees' 401(k) Retirement Plan
  • 5500 ind #791

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 Mining & Oil Extraction retirement plans → · Plans in Texas →

Marathon Oil Company Thrift Plan in the asset neighbourhood

Aarp Employees 401(k) Plan$886MMarathon Oil Company Thrift PlanMarathon Oil Company Thrift …$883MFlightsafety Employees' 401(k) Retirement PlanFlightsafety Employees' 401(…$882MNvr, Inc. Profit Sharing Plan$881MWsgr 401(k) and Profit Sharing PlanWsgr 401(k) and Profit Shari…$879M
End-of-year total assets ($M) among Marathon Oil Company Thrift Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)$835M
Net Assets (End of Year)$883M
Net Income$47M
Employer EIN251410539
Plan Effective Date1953-11-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Marathon Oil Company)

Sponsor-wide plan assets over time

All Marathon Oil Company plans reported in each filing year

Latest sponsor-wide plan assets
$1.2B 15.45082939902673% vs 2022
2024 filing year
$0.95B$1B$1.05B$1.1B$1.15B$1.2B 202220232024 $1.01B $1.16B ▲ +14.9%
Year Plans Participants Total Assets
2022 2 2,209 $1.0B
2023 2 2,347 $1.1B
2024 2 2,552 $1.2B

Nearby 401(k) Plans in Texas

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

Marathon Oil Company Thrift Plan vs. nearby 401(k) plans in Texas, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000 -1001020304050 Total assets ($B) Participants Marathon Oil Company Thrift Plan, Total assets ($B): 0.882736154 · Participants: 1177Marathon Oil Company Thrift PlanAT&T Retirement Savings Plan, Total assets ($B): 40.012012 · Participants: 119854AT&T Retirement Savings PlanExxonmobil Savings Plan, Total assets ($B): 21.917 · Participants: 23477Exxonmobil Savings PlanCaterpillar 401(k) Savings Plan, Total assets ($B): 16.496476432 · Participants: 41679Caterpillar 401(k) Savings PlanAmerican Airlines, Inc. 401(k) Plan, Total assets ($B): 14.680189879 · Participants: 88792American Airlines, Inc. 401(k) PlanDell Inc. 401(k) Plan, Total assets ($B): 13.529835 · Participants: 45686Dell Inc. 401(k) Plan
Marathon Oil Company Thrift Plan vs. nearby 401(k) plans in Texas, assets vs. participants
Compare Marathon Oil Company Thrift Plan side-by-side with 3 peers →

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

Outside Texas, the nearest 401(k) by assets is Flightsafety Employees' 401(k) Retirement Plan in OH ($882M); by covered participants it is Quest Management 401(k) Plan in IL (1,177 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($883M here).

Similar participant headcount

Nearest other-state filings by covered participants (1,177 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 Oil Company Thrift Plan assets move in 2023? ▼
Marathon Oil Company Thrift Plan grew at a solid clip - up 5.7% during 2023, from $835M to $883M. Reported net income was $47M.
How have Marathon Oil Company plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Marathon Oil Company's sponsor-wide assets grew 15.5%, from $1.0B to $1.2B.
Where does Marathon Oil Company Thrift Plan rank by assets among Form 5500 filers? ▼
Marathon Oil Company Thrift Plan ranks in the 98th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to Marathon Oil Company Thrift Plan? ▼
Among 401(k) plans in other states, the closest by assets is Flightsafety Employees' 401(k) Retirement Plan in OH ($882M, 4,517 participants).
Which 401(k) plans cover a similar participant headcount to Marathon Oil Company Thrift Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Quest Management 401(k) Plan in IL (1,177 participants, $5M 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 251410539.

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.