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ONEOK INC /NEW/

LISTEDNYSE

SYMBOLOKE

SIC4923

STATE OF INC.OK

FISCAL YEAR ENDSDecember 31

CIK1039684

NATURAL GAS TRANSMISISON & DISTRIBUTION · LARGE ACCELERATED FILER · 10 FISCAL YEARS OF SEC XBRL DATA, 2016–2025

Fiscal years labelled by the calendar year in which they end. Bars in $ billions; per-share figures as reported.

CAPITALIZATION 12/31/25

($ millions)	Amount	%
Total debt	32,816	59.3
Stockholders' equity	22,485	40.7
Total capitalization	55,301	100.0

630,369,667 shares outstanding at 27 July 2026 (cover page of the 10-Q filed 4 August 2026).

LONG-TERM DEBT 12/31/25

($ millions)	Amount
Long-term debt, noncurrent	30,755
Current maturities	1,241
Short-term borrowings / commercial paper	820

CAPITAL STOCK 12/31/25

Common shares authorized	1,200,000,000
Common shares issued	655,909,018
Treasury shares	26,201,327
Par or stated value per share ($)	0.01
Preferred stock ($ millions)	0
Outstanding at 7/27/26	630,369,667

DIVIDENDS DECLARED/PAID

Fiscal year	Per share $	Payout %
2025	4.12	76.0
2024	3.96	76.6
2023	3.82	69.7
2022	3.74	97.4
2021	3.74	111.6

HISTORY AND BUSINESS

HISTORY: Incorporated in Oklahoma. Formerly known as WAI INC (to 28 November 1997).

BUSINESS: Classified by the SEC under Standard Industrial Classification 4923, Natural Gas Transmisison & Distribution. Large accelerated filer. Principal executive office: 100 West 5Th St, Tulsa, OK 74103. Fiscal year ends December 31. For a description of the business, see Item 1 of the latest 10-K.

CONSOLIDATED INCOME ACCOUNT, YEARS ENDED

($ millions)	12/31/25	12/31/24	12/31/23
Operating revenues	33,629	21,698	17,677
Operation and maintenance	2,585	2,162	1,319
Depreciation and amortization	1,514	1,134	769
Operating income	5,741	4,989	4,072
Interest charges	1,783	1,371	866
Income before income taxes	4,490	4,110	3,497
Income taxes	1,028	998	838
Net income	3,393	3,035	2,659
Earned per share, diluted ($)	5.42	5.17	5.48
Dividends per share ($)	4.12	3.96	3.82

CONSOLIDATED BALANCE SHEET

($ millions)	12/31/25	12/31/24
Utility plant, net	47,861	45,935
Cash and equivalents	78	733
Total current assets	4,488	4,238
Total assets	66,641	64,069
Total current liabilities	6,365	4,719
Long-term debt	30,755	31,018
Common stockholders' equity	22,485	17,036
Total capitalization and liabilities	66,641	64,069

TEN-YEAR STATISTICS: FISCAL YEARS ($ millions except per share)

Fiscal year ended	Revenues	Oper. income	Net income	Net margin %	EPS diluted $	Div. per share $	Oper. cash flow	Capital expend.	Free cash flow	Total assets	Total liabilities	Total debt	Stockholders' equity	ROE %	Debt / equity
12/31/25	33,629	5,741	3,393	10.1	5.42	4.12	5,599	3,152	2,447	66,641	44,072d	32,816	22,485	15.1	1.46
12/31/24	21,698	4,989	3,035	14.0	5.17	3.96	4,888	2,021	2,867	64,069	41,936d	32,100	17,036	17.8	1.88
12/31/23	17,677	4,072	2,659	15.0	5.48	3.82	4,421	1,595	2,826	44,266	27,782d	21,700	16,484	16.1	1.32
12/31/22	22,387	2,807	1,722	7.7	3.84	3.74	2,906	1,202	1,704	24,379	17,885d	13,600	6,494	26.5	2.09
12/31/21	16,540	2,596	1,499	9.1	3.35	3.74	2,546	697	1,849	23,622	17,606d	13,600	6,016	24.9	2.26
12/31/20	8,542	1,361	613	7.2	1.42	3.74	1,899	2,195	(296)	23,079	17,036d	14,200	6,043	10.1	2.35
12/31/19	10,164	1,914	1,279	12.6	3.07	3.53	1,947	3,848	(1,902)	21,812	15,586d	12,720	6,226	20.5	2.04
12/31/18	12,593	1,835	1,152	9.1	2.78	3.25	2,187	2,141	45	18,232	11,652d	9,400	6,580	17.5	1.43
12/31/17	12,174	1,392	388	3.2	1.29	2.72	1,315	512	803	16,846	11,161d	9,115	5,528	7.0	1.65
12/31/16	8,921	1,296	352	3.9	1.66	2.46	1,353	625	729	16,139	12,710d	9,410	189	186.5	49.86

Net margin = net income ÷ revenues; ROE = net income ÷ year-end stockholders’ equity; total debt = long-term debt including current maturities plus short-term borrowings/commercial paper, as tagged in XBRL; free cash flow = operating cash flow − purchases of property, plant and equipment; d = derived as total assets − total equity where the filing does not tag total liabilities; – = not reported in XBRL for that year.

REGISTRANT:

ONEOK INC /NEW/
CIK 1039684 · EIN 73-1520922

PRINCIPAL OFFICE:

100 West 5Th St, Tulsa, OK 74103
Tel.: 9185887000

INCORPORATED:

Oklahoma

INDUSTRY (SEC SIC CODE):

4923 · Natural Gas Transmisison & Distribution

FILER STATUS:

Large accelerated filer

LATEST ANNUAL REPORT:

10-K for period ended 12/31/25, filed 24 February 2026

FORMER NAMES:

ONEOK INC /NEW/; WAI INC

RECENT FILINGS (ANNUAL REPORT REFERENCES BELOW):

9/15/26	8-K	period 9/15/26
8/31/26	8-K	period 8/28/26
8/4/26	10-Q	period 6/30/26
8/3/26	8-K	period 8/3/26
5/21/26	8-K	period 5/20/26
4/29/26	10-Q	period 3/31/26
4/28/26	8-K	period 4/28/26
4/1/26	DEF 14A	period 5/20/26

Sources: SEC XBRL company facts (all financial figures) · SEC submissions (registrant, address, SIC, filings) · annual reports: 10-K FY2025 (filed 2/24/26) · 10-K FY2024 (filed 2/25/25) · 10-K FY2023 (filed 2/27/24) · 10-K FY2020 (filed 2/23/21) · 10-K FY2019 (filed 2/25/20) · 10-K FY2018 (filed 2/26/19). Values are the latest figures filed for each fiscal year (restated where a later 10-K restated them). Ratios and free cash flow are Pathos calculations from those figures. Retrieved 31 October 2026.