Oneok 401(k) and pension plans

Oneok, Inc., Tulsa, OK. EIN 73-1520922. Annual reports 2009–2025.

Oneok, Inc. has 2 active retirement plans on file. The largest is the Oneok, Inc. 401(k) Plan, with 7,120 participants and $1.7 billion in assets in 2025. Fidelity has been its recordkeeper since 2011.

Active plans: 2
Participants: 8,573
Plan assets: $2.1 billion
401(k) recordkeeper: Fidelity
Plans on file: 3
Industry: Transportation and warehousing

All 3 plans

Active plans first

Oneok, Inc. 401(k) Plan

401(k) with ESOPActive

Active. The plan filed its annual report for the 2025 plan year.

Plan number: 002Employer EIN 73-1520922
Participants (2025): 7,120
Net assets (2025): $1.7 billion
Recordkeeper: FidelityEarlier: BOK Financial (2010), Bank of Oklahoma (2009)
Plan administrator: Oneok, Inc. Benefit Plan Administration Committee
100 West Fifth Street
Tulsa, OK 74103
(918) 588-7000As filed for 2025
In effect since: April 1, 1956

Plans merged into this one: Oneok, Inc. Profit Sharing Plan (2018).

Earlier plan names: Thrift Plan for Employees of Oneok Inc. and Subsidiaries; Thrift Plan for Employees of Oneok, Inc. and Subsidiaries.

Year by year, 2009 to 2025

Plan year	Participants	Net assets	Recordkeeper
2025	7,120	$1.7 billion	Fidelity
2024	5,837	$1.4 billion	Fidelity
2023	5,429	$1.2 billion	Fidelity
2022	3,588	$770 million	Fidelity
2021	3,428	$850 million	Fidelity
2020	3,421	$692 million	Fidelity
2019	3,403	$693 million	Fidelity
2018	3,163	$538 million	not listed
2017	2,866	$470 million	not listed
2016	2,763	$430 million	not listed
2015	2,735	$306 million	not listed
2014	2,555	$352 million	not listed
2013	5,462	$1.1 billion	not listed
2012	5,345	$868 million	not listed
2011	5,364	$852 million	Fidelity
2010	5,260	$719 million	BOK Financial
2009	5,243	$626 million	Bank of Oklahoma

Oneok, Inc. Retirement Plan

Pension (defined benefit)Active

Active. The plan filed its annual report for the 2024 plan year.

Plan number: 001Employer EIN 73-1520922
Participants (2024): 1,453
Net assets (2024): $336 million
Administered by: WTWEarlier: Fidelity (2015–2020), Bank of Oklahoma (2009–2010)
Plan administrator: Oneok, Inc. Benefit Plan Administration Committee
Oneok, Inc., 100 West 5TH Street
Tulsa, OK 74103
(918) 588-7000As filed for 2024
In effect since: March 1, 1941

Earlier plan names: Retirement Plan for Employees of Oneok, Inc. and Subsidiaries.

Year by year, 2009 to 2024

Plan year	Participants	Net assets	Recordkeeper
2024	1,453	$336 million	WTW
2023	1,465	$335 million	WTW
2022	1,485	$322 million	not listed
2021	1,507	$413 million	not listed
2020	1,525	$379 million	Fidelity
2019	1,530	$348 million	Fidelity
2017	1,582	$318 million	Fidelity
2016	1,575	$261 million	Fidelity
2015	1,598	$258 million	Fidelity
2014	1,607	$276 million	not listed
2013	6,845	$1.1 billion	not listed
2012	6,914	$953 million	not listed
2011	7,592	$866 million	not listed
2010	7,636	$863 million	Bank of Oklahoma
2009	7,734	$711 million	Bank of Oklahoma

Oneok, Inc. Profit Sharing Plan

Employee stock ownership plan (ESOP)Merged

Merged. In 2018 its assets moved to the Oneok, Inc. 401(k) Plan, sponsored by Oneok, Inc. (EIN 73-1520922, plan 002). Accounts moved with them, so that plan is the one to contact.

Plan number: 010Employer EIN 73-1520922
Participants (2017): 2,246
Net assets (2017): $65.0 million
Plan administrator: Oneok, Inc. Benefit Plan Administration Committee
100 West Fifth Street
Tulsa, OK 74103
(918) 588-7000As filed for 2018
In effect since: January 1, 2005

Earlier plan names: Profit Sharing Plan.

Year by year, 2009 to 2018

Plan year	Participants	Net assets	Recordkeeper
2018	0	$0	not listed
2017	2,246	$65.0 million	not listed
2016	2,103	$53.5 million	not listed
2015	2,041	$36.1 million	not listed
2014	1,850	$37.5 million	not listed
2013	2,867	$49.8 million	not listed
2012	2,442	$36.1 million	not listed
2011	2,141	$28.5 million	not listed
2010	1,718	$19.3 million	not listed
2009	1,531	$12.8 million	not listed

Plans that moved to another employer

Plan	Now sponsored by	Since
One Gas, Inc Texas Gas Service Retirement Plan	One Gas, Inc.	2013

These plans once filed under Oneok's tax ID and are now filed by another employer, usually after a sale or spin-off. Accounts moved with them.

If you had money in one of these plans

Call Fidelity (fidelity.com), which runs the Oneok, Inc. 401(k) Plan. With your Social Security number and the plan name, it can tell you whether you still have a balance and, if not, where it went.
Or call the plan administrator listed on the plan below ((918) 588-7000). That number was filed for 2025; ask for the benefits or retirement plan office.
If your plan was merged, your account moved with it. Follow the link on the plan to the plan it went into, and contact that one.
Still stuck? The Department of Labor's benefits advisers help for free: askebsa.dol.gov or 1-866-444-3272. Never pay anyone to find your own money.

What these numbers are

They come from the Form 5500 annual reports each plan files with the Department of Labor, as the plan filed them. A plan year is usually a calendar year.
Participants counts everyone in the plan at year end: current employees, former employees who still have a balance or a pension coming, and retirees or beneficiaries being paid.
The recordkeeper is the service provider whose Schedule C entry says it keeps the plan's records. Small plans do not file Schedule C, so some plans show none.
We cannot see anyone's account. Only the plan or its recordkeeper can tell you your balance.

Sources: U.S. Department of Labor, Form 5500 datasets and PBGC trusteed plans. How we read them.