Defined Benefit (Pension) · DOL Form 5500 · 2024

One Gas, Inc. Pension Plan

Data updated 2026-08-25

$726M
Total assets Above avg plan size
670
Participants Below avg headcount
98th
Percentile by assets National rank
$1.1M
Avg per participant High balance/head
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Official DOL plan name: One Gas, Inc. Retirement Plan · Sponsored by One Gas, Inc. · Oklahoma · Utilities

$726M in assets, 670 participants

One Gas, Inc.'s One Gas, Inc. Retirement Plan reported $726M in total assets and 670 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.

  • #616 in Utilities (732 peers)

Where One Gas, Inc. Retirement Plan sits by assets

One Gas, Inc. Retirement Plan sits in the top 5% of all filed plans by assets, $726M for 670 participants (~$1.1M/participant), down 8.7% in 2024.

#616
in Utilities (732 peers)
-8.7%
assets change YoY
7.3×
vs typical plan assets (national mean)

The plan reported a net loss of $69M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

One Gas, Inc. Retirement Plan's outsized position by total assets

One Gas, Inc. Retirement Plan vs every filed plan by assets

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

$726,126,000 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. Retirement Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. One Gas, Inc. Retirement Plan sits mid-pack in the medium band (670 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • One Gas, Inc. Retirement Plan reported net income fell from $26M in the plan year 2023 filing to -$69M in the plan year 2024 filing.
  • One Gas, Inc. Retirement Plan reported participants fell from 740 in the plan year 2023 filing to 670 in the plan year 2024 filing.
  • One Gas, Inc. Retirement Plan end-of-year assets fell from $796M in the plan year 2023 filing to $726M in the plan year 2024 filing.

See the national 2023→2024 release diff →

EBSA filing schedule strip

Filing strip 463561936 · One Gas, Inc. PY 2024 · Defined Benefit (Pension)

One Gas, Inc. Retirement Plan · $726M · 670 · 98th

  • SCH $726M
  • EBSA 670
  • PART 98th
  • TYPE Defined Benefit (Pension)
  • NET near The Trane Merged Hourly Pension Plan
  • BOOK ind #616

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. Retirement Plan in the asset neighbourhood

Ohio Farmers Insurance Company Pension PlanOhio Farmers Insurance Compa…$728MThe Trane Merged Hourly Pension PlanThe Trane Merged Hourly Pens…$726MOne Gas, Inc. Retirement Plan$726MTexas Children's Hospital Cash Balance Pension PlanTexas Children's Hospital Ca…$726MNational Basketball Association Players' Pension PlanNational Basketball Associat…$725M
End-of-year total assets ($M) among One Gas, Inc. Retirement Plan and nearest nationwide Defined Benefit (Pension) peers. Source: DOL Form 5500 plan year 2024.

Scale-class filing particulars (2024)

Total Assets (Beginning of Year)$796M
Net Assets (End of Year)$726M
Net Income-$69M
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 Defined Benefit (Pension) Plans in Oklahoma

Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.

One Gas, Inc. Retirement Plan vs. nearby Defined Benefit (Pension) plans in Oklahoma, assets vs. participants Scatter plot of 6 data points. -100001000200030004000 00.511.52 Total assets ($B) Participants One Gas, Inc. Retirement Plan, Total assets ($B): 0.726126 · Participants: 670One Gas, Inc. Retirement PlanPipeline Industry Pension Fund, Total assets ($B): 1.68715114 · Participants: 2308Pipeline Industry Pension FundWilliams Pension Plan, Total assets ($B): 1.357458939 · Participants: 3357Williams Pension PlanRetirement Plan for Employees of Devon Energy Corporation, Total assets ($B): 0.43487459 · Participants: 155Retirement Plan for Employees of Devon Energy CorporationIntegris Health, Inc. Retirement Plan a, Total assets ($B): 0.424374198 · Participants: 1061Integris Health, Inc. Retirement Plan aOneok, Inc. Retirement Plan, Total assets ($B): 0.335979 · Participants: 192Oneok, Inc. Retirement Plan
One Gas, Inc. Retirement Plan vs. nearby Defined Benefit (Pension) plans in Oklahoma, assets vs. participants
Compare One Gas, Inc. Retirement Plan side-by-side with 3 peers →

One Gas, Inc. Retirement Plan's out-of-state Defined Benefit (Pension) peers by assets and headcount

Outside Oklahoma, the nearest Defined Benefit (Pension) by assets is The Trane Merged Hourly Pension Plan in NC ($726M); by covered participants it is Tegna Retirement Plan in VA (670 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (670 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. Retirement Plan assets move in 2024? ▼
One Gas, Inc. Retirement Plan pulled back noticeably - down 8.7% during 2024, from $796M to $726M. Reported net income was -$69M.
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. Retirement Plan rank by assets among Form 5500 filers? ▼
One Gas, Inc. Retirement 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 Defined Benefit (Pension) plans are similar in size to One Gas, Inc. Retirement Plan? ▼
Among Defined Benefit (Pension) plans in other states, the closest by assets is The Trane Merged Hourly Pension Plan in NC ($726M, 1,100 participants).
Which Defined Benefit (Pension) plans cover a similar participant headcount to One Gas, Inc. Retirement Plan? ▼
Among Defined Benefit (Pension) plans in other states, the closest by covered participants is Tegna Retirement Plan in VA (670 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.