ONEOK, Inc.
- Stuart KasiskeSigns company filings · Form 5500 (2022)
How we got $33.63B
Based on SEC filings (FY2025).
Employees over time
▲ 120% since 2020Show as table
| Year | Source | Employees | Est. revenue |
|---|---|---|---|
| 2020 | Form 5500 | 2,877 | $4.49B |
| 2021 | Form 5500 | 2,835 | $4.43B |
| 2022 | Form 5500 | 2,965 | $4.63B |
| 2023 | Form 5500 | 4,756 | $7.42B |
| 2024 | Form 5500 | 5,150 | $8.04B |
| 2025 | Form 5500 | 6,326 | $9.88B |
Participants are employees in the company's retirement plan at year end, from its Form 5500 filing with the Department of Labor. They usually run a little under total headcount (part-timers and new hires may not be eligible). Revenue and EBITDA apply this industry's revenue per employee and margin to each year's count.
What we know
What they do
ONEOK, Inc. is a Tulsa-based midstream energy company that gathers, processes, fractionates, transports, stores and exports natural gas, natural gas liquids, refined products and crude oil. It describes its services as serving producers and end-use energy markets.
From the company's website. Industry: Pipeline Transportation of Natural Gas.
Compared with similar businesses nearby
| Business | Est. revenue | Distance |
|---|---|---|
| ONEOK, Inc. this business | $33.63B | — |
| Williams Tulsa | $966K | 0.3 mi |
| NSI TECHNOLOGIES, LLC Tulsa · 11 employees | $16.5M | 7.4 mi |
| Enerfin Inc Broken Arrow | $2.0M | 14.1 mi |
The full calculation
Figures are shown toward the upper part of their range rather than at its middle.
Brought up to date assuming revenue has grown 8% a year since 2020, when the PPP figures were reported; included above.
These are the business's own reported figures, from its SEC annual report (10-K), not an estimate.
| Revenue range | $31.95B – $35.31B |
| EBITDA range | $6.89B – $7.62B |
| Industry (NAICS) | Pipeline Transportation of Natural Gas (486210) |
EBITDA margin: from IRS tax returns of S corporations in this industry (2019–2022), adjusted for company size: smaller companies typically run higher margins. EBITDA here is after owners' salaries.
Benchmarks: US Economic Census 2022, OK. PPP loans were sized on 2019–2020 payroll, so figures reflect that period. These are statistical estimates, not reported financials. Listing details come from Overture Maps open data. Full methodology
History & advisors
Advisors
- AccountingForvis Mazars, LLPAudits its 401(k) plan (2025 filing)
From the company's own website and public filings (DOL Form 5500, IRS Form 990, SBA). Roles are as stated there and may be out of date.
Public records
Matched to this business by name and address from public government data; a match can occasionally be wrong.
About ONEOK, Inc.
ONEOK, Inc. is a pipeline transportation of natural gas company in Tulsa, Oklahoma, in business since 1995. It is owned by Pierce H. Norton II (President and CEO). Its reported annual revenue is about $33.63B, with roughly $7.25B of EBITDA. It has about 6,326 employees.
Common questions
- Who owns ONEOK, Inc.?
- ONEOK, Inc. is owned by Pierce H. Norton II (President and CEO), according to public sources such as the company's website or filings.
- How much revenue does ONEOK, Inc. make?
- ONEOK, Inc. reported revenue of about $33.63B.
- How many employees does ONEOK, Inc. have?
- About 6,326, from its 2025 retirement-plan filing.
- When was ONEOK, Inc. founded?
- ONEOK, Inc. has been in business since 1995.