401(k) · DOL Form 5500 · 2024

One Gas, Inc. 401(k) Plan

Data updated 2026-08-25

$968M
Total assets Above avg plan size
3,860
Participants Above avg headcount
98th
Percentile by assets National rank
$250,758
Avg per participant Above avg balance/head
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Official DOL plan name: One Gas, Inc. 401(k) Plan · Sponsored by One Gas, Inc. · Oklahoma · Utilities

$968M in assets, 3,860 participants

One Gas, Inc.'s One Gas, Inc. 401(k) Plan reported $968M in total assets and 3,860 participants in its 2024 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.

  • #639 in Utilities (732 peers)

Coverage in Oklahoma

One Gas, Inc. 401(k) Plan covers 3,860 participants in Oklahoma, 5.1x the typical Oklahoma plan (state average ~760 per filing). Assets: $968M.

#639
in Utilities (732 peers)
+12.1%
assets growth YoY
9.7×
vs typical plan assets (national mean)

One Gas, Inc. 401(k) Plan's outsized position by total assets

One Gas, Inc. 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$967,927,000 Top 2% higher than 98% of 123,620 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 2024

One Gas, Inc. 401(k) Plan's large-plan peer group by participant headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. One Gas, Inc. 401(k) Plan lands in the large band (3,860 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • One Gas, Inc. 401(k) Plan reported net income rose from $90M in the plan year 2023 filing to $104M in the plan year 2024 filing.
  • One Gas, Inc. 401(k) Plan end-of-year assets rose from $864M in the plan year 2023 filing to $968M in the plan year 2024 filing.
  • One Gas, Inc. 401(k) Plan reported participants rose from 3,716 in the plan year 2023 filing to 3,860 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 463561936 · One Gas, Inc. PY 2024 · 401(k)

One Gas, Inc. 401(k) Plan · $968M · 3,860 · 98th

  • EIN $968M
  • RANK 3,860
  • PHOTO 98th
  • IND 401(k)
  • EOY near Mccormick 401(k) Retirement Plan
  • 5500 ind #639

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 Utilities retirement plans → · Plans in Oklahoma →

One Gas, Inc. 401(k) Plan in the asset neighbourhood

Cleveland Clinic 401(k) Plan$969MUline, Inc. Profit Sharing Plan and TrustUline, Inc. Profit Sharing P…$968MMccormick 401(k) Retirement PlanMccormick 401(k) Retirement …$968MOne Gas, Inc. 401(k) Plan$968MHarley-Davidson Retirement Savings Plan for Salaried EmployeesHarley-Davidson Retirement S…$967M
End-of-year total assets ($M) among One Gas, Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Oklahoma filing particulars

Total Assets (Beginning of Year)$864M
Net Assets (End of Year)$968M
Net Income$104M
Employer EIN463561936
Plan Effective Date2014-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (One Gas, Inc.)

Sponsor-wide plan assets over time

All One Gas, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$1.7B 9.763316484910609% vs 2022
2024 filing year
$1.5B$1.55B$1.6B$1.65B$1.7B$1.75B 202220232024 $1.54B $1.69B ▲ +9.7%
Year Plans Participants Total Assets
2022 2 4,426 $1.5B
2023 2 4,456 $1.7B
2024 2 4,530 $1.7B

Nearby 401(k) Plans in Oklahoma

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

One Gas, Inc. 401(k) Plan vs. nearby 401(k) plans in Oklahoma, assets vs. participants Scatter plot of 6 data points. 050001000015000 0123456 Total assets ($B) Participants One Gas, Inc. 401(k) Plan, Total assets ($B): 0.967927 · Participants: 3860One Gas, Inc. 401(k) PlanQuiktrip Corporation Retirement Plan, Total assets ($B): 4.827423826 · Participants: 13369Quiktrip Corporation Retirement PlanThe Williams Investment Plus Plan, Total assets ($B): 1.978642425 · Participants: 5204The Williams Investment Plus PlanOneok, Inc. 401(k) Plan, Total assets ($B): 1.415489 · Participants: 4756Oneok, Inc. 401(k) PlanBok Financial 401(k) Plan, Total assets ($B): 1.190240873 · Participants: 4907Bok Financial 401(k) PlanDevon Energy Corporation Incentive Savings Plan, Total assets ($B): 1.073833495 · Participants: 1958Devon Energy Corporation Incentive Savings Plan
One Gas, Inc. 401(k) Plan vs. nearby 401(k) plans in Oklahoma, assets vs. participants
Compare One Gas, Inc. 401(k) Plan side-by-side with 3 peers →

One Gas, Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Oklahoma, the nearest 401(k) by assets is Mccormick 401(k) Retirement Plan in MD ($968M); by covered participants it is Private National Mortgage Acceptance Company LLC Retirement Plan in CA (3,860 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($968M here).

Similar participant headcount

Nearest other-state filings by covered participants (3,860 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did One Gas, Inc. 401(k) Plan assets move in 2024? ▼
One Gas, Inc. 401(k) Plan grew at a solid clip - up 12.1% during 2024, from $864M to $968M. Reported net income was $104M.
How have One Gas, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), One Gas, Inc.'s sponsor-wide assets grew 9.8%, from $1.5B to $1.7B.
Where does One Gas, Inc. 401(k) Plan rank by assets among Form 5500 filers? ▼
One Gas, Inc. 401(k) Plan ranks in the 98th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to One Gas, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Mccormick 401(k) Retirement Plan in MD ($968M, 4,639 participants).
Which 401(k) plans cover a similar participant headcount to One Gas, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Private National Mortgage Acceptance Company LLC Retirement Plan in CA (3,860 participants, $338M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 463561936.

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.