ONEOK (OKE) 11-K Annual report of employee stock purchases

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 11-K

X ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2023

OR

_ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from_______________to_______________

Commission file number 001-13643

A. Full title of the plan and the address of the plan, if different from that of the issuer named below:

ONEOK, INC. 401(k) PLAN

B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:

ONEOK, Inc.

100 West Fifth Street

Tulsa, Oklahoma 74103

ONEOK, INC. 401(k) PLAN

TABLE OF CONTENTS

The following financial statements and schedule prepared in accordance with the financial reporting requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA), and exhibits are filed for the ONEOK, Inc. 401(k) Plan:

Financial Statements and Schedule	Page
Report of Independent Registered Public Accounting Firm	3
Financial Statements:
Statements of Net Assets Available for Benefits - December 31, 2023 and 2022	4
Statement of Changes in Net Assets Available for Benefits - Year Ended December 31, 2023	5
Notes to Financial Statements	6
Schedule:
Schedule H, Line 4i - Schedule of Assets (Held at End of Year)	12
Signature	13
Exhibit Index	14
23 - Consent of Independent Registered Public Accounting Firm

All other schedules required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under ERISA are omitted as they are inapplicable or not required.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

ONEOK, Inc. Audit Committee

ONEOK, Inc. Benefit Plan Administration Committee and Plan Participants

ONEOK, Inc. 401(k) Plan

Tulsa, Oklahoma

Opinion on the Financial Statements

We have audited the accompanying statements of net assets available for benefits of ONEOK, Inc. 401(k) Plan (the Plan) as of December 31, 2023 and 2022, the related statement of changes in net assets available for benefits for the year ended December 31, 2023, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2023 and 2022, and the changes in net assets available for benefits for the year ended December 31, 2023, in conformity with accounting principles generally accepted in the United States of America.

Basis of Opinion

These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Plan in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Report on Supplemental Information

The supplemental information in the accompanying Schedule H, Line 4i – Schedule of Assets (Held at End of Year) as of December 31, 2023, has been subjected to audit procedures performed in conjunction with the audit of the Plan’s financial statements. The supplemental schedule is the responsibility of the Plan’s management. Our audit procedures included determining whether the supplemental schedule reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental schedule. In forming our opinion on the supplemental schedule, we evaluated whether the supplemental schedule, including its form and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the Schedule H, Line 4i – Schedule of Assets (Held at End of Year) as of December 31, 2023, is fairly stated, in all material respects, in relation to the basic financial statements taken as a whole.

Forvis Mazars, LLP

We have served as the Plan’s auditor since 2005.

Tulsa, Oklahoma

June 21, 2024

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ONEOK, INC. 401(k) PLAN

Statements of Net Assets Available for Benefits

December 31, 2023 and 2022

(In thousands)

	2023		2022
Investments, at fair value (Note 4)	$	1,115,325	$	744,198
Receivables:
Employer contributions	21,249		13,085
Notes receivable from participants	20,017		13,143
Total receivables	41,266		26,228
Net assets available for benefits	$	1,156,591	$	770,426

See accompanying Notes to Financial Statements.

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ONEOK, INC. 401(k) PLAN

Statement of Changes in Net Assets Available for Benefits

Year Ended December 31, 2023

(In thousands)

Investment income:
Net appreciation in fair value of investments	$	109,221
Dividends and interest	24,952
Total investment income	134,173
Interest income on notes receivable from participants	735
Contributions:
Participants	36,915
Employer	47,209
Rollovers (Note 1)	250,632
Total contributions	334,756
Benefits paid to participants	(83,499)
Net increase in net assets available for benefits	386,165
Net assets available for benefits, beginning of period	770,426
Net assets available for benefits, end of period	$	1,156,591

See accompanying Notes to Financial Statements.

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ONEOK, INC. 401(k) PLAN

Notes to Financial Statements

December 31, 2023

(1)Acquisition of Magellan Midstream Partners, L.P.

On September 25, 2023, ONEOK, Inc. (ONEOK or the Company) and its subsidiaries completed the acquisition of Magellan Midstream Partners, L.P. (Magellan). The legacy Magellan 401(k) Plan was terminated on September 24, 2023. Beginning on September 25, 2023, legacy Magellan employees were given the option to roll their 401(k) balances into the existing ONEOK 401(k) Plan (the Plan). Substantially all of the rollovers for the year ended December 31, 2023, relate to the acquisition of Magellan.

(2)Description of Plan

A brief description of the Plan follows and is provided for general information only. Participants should refer to the entire plan document for complete information.

(a)General

The Plan is administered by the ONEOK Benefit Plan Administration Committee (the Plan Administrator) and is provided for the benefit of the employees of ONEOK and its subsidiaries. The Plan is a defined contribution plan that covers all eligible employees of the Company and is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (ERISA). Temporary employees and interns are generally not eligible to participate in the Plan. Leased employees and employees who are not U.S. residents and receive no earned income from the Company which constitutes U.S. source income, are not eligible to participate in the Plan.

(b)Participation and Contributions

An eligible employee can begin participation in the Plan as of their date of hire and is enrolled automatically at a 6% pretax contribution rate, unless the employee opts out of the Plan or elects a different contribution rate. There is no minimum service or age requirement for participation (except for temporary employees and interns who are subject to certain service requirements). Participants may make pretax and/or Roth 401(k) contributions of any whole percentage of their eligible compensation up to a combined maximum of 50% if certain contribution limitations are not exceeded. In addition to pretax and/or Roth 401(k) contributions, participants may make after-tax contributions of any whole percentage of their eligible compensation up to a maximum of 6%. Earnings on pretax and after-tax contributions are taxable at the time of distribution.

Participants’ pretax contributions and/or Roth 401(k) contributions automatically increase annually by 1% until the participants’ contribution percentage reaches 10%. Participants may opt out of the automatic increases or elect a different contribution rate.

Participants age 50 and older before the end of the calendar year may make an additional pretax or Roth 401(k) catch-up contribution in excess of the 2023 Internal Revenue Service (IRS) elective deferral limit of $22,500 and other applicable Plan limits. The maximum catch-up contribution allowed in 2023 was $7,500.

Employees are eligible for Company matching contributions immediately upon enrollment in the Plan. The Company matches pretax, Roth 401(k), catch-up and/or after-tax contributions up to a combined maximum of 6% of eligible compensation each pay period.

The Company may, and generally expects to, make a profit sharing contribution to the Plan each calendar quarter that will result in an allocation to each eligible participant’s account equal to 1% of the participant’s eligible compensation for that quarter. A participant must be actively employed on the last day of the calendar quarter or have terminated during the quarter due to death, total disability or retirement (provided the participant is at least age 50 with five consecutive years of service) to qualify for the contribution. The Company may also make an additional discretionary profit sharing contribution to the Plan for each plan year. Participants must be actively employed on the last day of the year or have terminated during the year due to death, total disability or retirement (provided the participant is at least age 50 with five consecutive years of service) to qualify for an annual discretionary contribution. Participants actively accruing a benefit in a defined benefit pension plan maintained by

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the Company or any other affiliate or related organization, including the ONEOK Retirement Plan, Magellan Pension Plan and Magellan Pension Plan for United Steel Workers (USW) Employees, are not eligible for a profit sharing contribution. For the 2023 Plan year, profit sharing contributions totaled $24 million.

For the profit sharing contribution feature of the Plan, an eligible employee begins participation on his or her date of hire. There is no minimum service or age requirement for participation.

The Plan is a defined contribution plan subject to limits on the total combined employee and employer annual contributions. For 2023, the maximum for employee and employer combined annual contributions was the lesser of 100% of the participant’s compensation or $66,000, pursuant to the Internal Revenue Code (the Code) section 415 (c)(1)(A). These limits may be adjusted periodically by the IRS.

(c)Participant Accounts

Participants have the right to direct the investment of their account balances, including their contributions, deferrals and the Company’s matching and profit sharing contributions. If no investment option is elected by a participant, the funds in the participant’s account are invested in the Vanguard Target Retirement Trust II maturing closest to the year in which the participant will attain age 65. Participants may direct the investment of their account balances to more than one option. However, the minimum investment that can be directed to any one option is 1%, and whole increments of 1% must be used.

Participants may direct the sale or other disposition of securities in their account and may change their investment elections with Fidelity Management Trust Company (Plan Trustee) on a daily basis except during scheduled suspension periods. Neither the Company nor the Plan Trustee guarantees the value of the investments nor do they indemnify any participant against any loss that may result from such investments.

All interest, dividends and other income received by the Plan Trustee and all gains and losses from the sale of securities are credited or charged to the respective participant’s account. Brokerage commissions, transfer taxes, and other charges and expenses in connection with the purchase or sale of securities for the Plan are either added to the cost of the securities purchased or deducted from the proceeds of the sale. The cost charged to a participant’s account for each share of ONEOK common stock purchased is 2.9 cents.

ONEOK dividends are subject to ONEOK Board of Directors (Board) approval and are generally paid quarterly. A record date for determining the shareholders entitled to receive a quarterly dividend is set by the Board.

All dividends paid on ONEOK, common stock are reinvested in ONEOK common stock. Dividends reinvested are considered contributions but are not subject to Plan limits or limits under applicable rules of the IRS. Any dividends paid that are considered a return on capital are generally treated as a reduction in the basis of the participants’ shares held in the Plan.

Certain mutual fund companies have implemented market-timing restrictions designed to protect the long-term investors in the mutual fund. These restrictions limit the number of exchanges an investor may initiate within a given period of time, and certain funds may charge a redemption fee. Regularly scheduled sales to fund distributions to Plan participants and purchases from contributions are not subject to the restrictions.

If a participant is an officer or an employee in certain designated work groups (regardless of the level of position), the participant must obtain approval of all trading activity, except for certain regular payroll contributions, in the participant’s Plan account that involves ONEOK common stock prior to the execution of the transaction. For these employees, there are specific periods during which the participant may buy or sell ONEOK common stock during the year. Generally, these periods begin three business days after the public release of quarterly or annual financial results for ONEOK and continue until the first day of the following calendar quarter.

(d)Vesting

Company contributions to a participant account and dividends and interest, if any, attributable to the participant account are immediately and fully vested for the benefit of that participant upon receipt by the Plan Trustee (subject to subsequent loss, if any, through a decline in the market value of investments).

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(e)Distributions and Withdrawals

Participants may borrow from the Plan a minimum of $1,000 with a maximum amount not to exceed $50,000 or 50% of the participant’s nonforfeitable eligible account balance, whichever is less. Participant loans are reflected as notes receivable from participants in the Statements of Net Assets Available for Benefits. The Plan allows a participant up to two loans at any time. Profit sharing contributions are not eligible for loans.

The participant loans have a repayment schedule not to exceed 60 months, with the exception of proceeds used to purchase a principal residence, in which case the term of the loan repayment may be for a period not to exceed 120 months. The participant has the option to repay the loan in full at any time without penalty.

The interest rate on a participant loan is determined at origination and remains the same throughout the term of the repayment schedule. Interest rates on the participant loans at December 31, 2023, ranged from 3.25% to 10.50%.

In-service withdrawals from a participant’s account are permitted under specific circumstances, as follows:

•After-tax employee contributions may be withdrawn. There is a six-month suspension of Company matching on new contributions by the participant into the Plan for all after-tax withdrawals, unless the participant is at least age 59½ at the time of distribution.

•Unlimited in-service withdrawals are permitted when participants reach age 59½ and have completed five years of Plan participation, at any time and for any reason, without qualifying for a hardship withdrawal or suspending Plan contributions or Company matching contributions. Profit sharing contributions are not eligible for age 59½ in-service withdrawals.

•Former Western Resources, Inc. employees have grandfathered withdrawal options based on their account balances as of January 11, 1999. A withdrawal using these grandfathered withdrawal options results in a six-month suspension of Company matching on new contributions by the participant into the Plan.

Hardship withdrawals from elective deferrals, including earnings, are also permitted. No hardship withdrawal shall be permitted unless the participant has obtained all currently available distributions from the participant’s account, other than hardship distributions or loans.

Profit sharing and Company matching contributions are not eligible for hardship withdrawals.

The full value of the participant’s Plan account balance becomes payable if any of the following occur:

1.the participant retires or otherwise terminates employment with the Company, for any reason;

2.the participant dies;

3.the Plan is terminated; or

4.the Plan is modified in such a way that it adversely affects the participant’s right to the use of or withdrawal from the account (if the participant’s request is made within 90 days of the effective date of the modification) subject to any applicable legal requirements.

If a participant retires or otherwise terminates employment with the Company and the total account balance is more than $5,000, the participant may leave the balance in the Plan, make a direct rollover from the Plan to another employer’s qualified retirement plan or an Individual Retirement Account (IRA) or receive a single lump-sum payment from the Plan as soon as administratively possible after leaving the Company. If the participant’s account balance does not exceed $5,000, the full value of the account will be distributed to the participant as soon as administratively possible, unless the participant directs a rollover to another employer’s qualified plan or an IRA. If the participant does not request a distribution and the account balance is $1,000 or less, a lump-sum cash payment will be made. If a distribution is not requested and the balance exceeds $1,000 but not $5,000, the account balance will be transferred to an IRA established on behalf of the participant.

Eligible participants may elect, in lieu of a single lump-sum payment, to receive distributions under a systematic withdrawal plan providing for cash installment payments payable annually, semi-annually, quarterly, monthly or other periodic time period as permitted by the Plan and as designated by the participant.

If a participant receives a lump-sum taxable distribution from the Plan, the IRS generally requires the Plan to automatically withhold 20% for federal income taxes, which is submitted to the IRS by the Plan Trustee on behalf

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of the participant. In addition to federal income taxes, some states require mandatory withholding of state income taxes on taxable distributions. The 20% federal income taxes and applicable state income taxes are not withheld if a participant elects to make a direct rollover of the distribution to an IRA or another employer’s qualified retirement plan. An additional 10% excise tax generally will be imposed on the taxable portion of distributions or withdrawals unless the participant has reached age 59½, or separates from the Company after attainment of age 55.

(f)Plan Termination

Although it has not expressed any intent to do so, the Company has the right to terminate the Plan at any time subject to the provisions of ERISA and the Code. Upon termination of the Plan, each participant would receive distribution of the entire balance of their Plan account.

(3)Summary of Significant Accounting Policies

(a)Basis of Presentation

The accompanying financial statements of the Plan have been prepared on an accrual basis of accounting.

(b)Investment and Notes Receivable Valuation and Income Recognition

Quoted market prices, if available, are used to value the investments included in the ONEOK 401(k) Plan Trust (the Trust) for the years ended December 31, 2023 and 2022. The Plan also utilizes net asset value (NAV) per share (or its equivalent) to classify fair value amounts recognized or disclosed in our financial statements based on the observability of inputs used to estimate such fair value. The units of the collective investment trusts that are not exchange-traded or quoted in an active market are valued at fair value using the NAV practical expedient. The NAV is based on the fair value of the underlying assets. Notes receivable from participants are stated at their unpaid principal balance plus any accrued but unpaid interest. Delinquent notes receivable from participants are recorded as a distribution based upon the terms of the Plan document.

Purchases and sales of investments are recorded on a trade-date basis. Dividend income is recorded as of the ex-dividend date and is allocated to participants’ accounts on the date of payment. Net appreciation (depreciation) in the fair value of investments includes the Plan’s gains and losses on investments bought and sold as well as held during the year. This activity is reflected in investment income on the accompanying Statement of Changes in Net Assets Available for Benefits.

The Plan provides for investments in various investment securities that, in general, are exposed to risks, such as interest rate, credit and overall price and market volatility. Due to the level of risk associated with certain investment securities, it is reasonably possible that changes in the value of investment securities held in participants’ accounts will occur in the near term and that such changes could materially affect the amounts reported in the Statements of Net Assets Available for Benefits.

(c)Administrative Costs

All costs and expenses for administering the Plan, including expenses of the Plan Administrator and fees and expenses of the Plan Trustee, excluding costs paid by the participant, which include loan origination and maintenance fees, qualified domestic relations order fees, brokerage commissions, investment fund expense ratios, redemption fees and transfer taxes applicable to investment of securities or investments acquired or sold for a participant’s account, are paid by the Company or the Plan as provided by the plan document. For the year ended December 31, 2023, the Company paid all costs and expenses for administering the Plan, excluding costs and expenses paid (directly or indirectly) by Plan participants, and the Company has not sought reimbursement from the Plan.

(d)Payment of Benefits

Benefits or withdrawals are recorded when paid.

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(e)Income Taxes

The Plan is intended in all respects to be a qualified plan under the Code. The Plan received a favorable determination letter from the IRS dated October 22, 2013, stating that the Plan document was in compliance with applicable requirements of the Code.

The Plan is amended from time to time to conform to changes in applicable law and to reflect discretionary changes in plan design approved by the ONEOK Benefit Plan Sponsor Committee. The Plan Administrator believes that the Plan and the Trust remain in documentary compliance with the tax qualification requirements of the Code.

(f)Use of Estimates

The preparation of these financial statements in conformity with accounting principles generally accepted in the United States of America requires a number of estimates and assumptions by the Plan Administrator relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of additions and deductions during the reporting period. Actual results could differ from those estimates.

(g)Fair Value of Plan Assets

Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Plan utilizes a fair value hierarchy that prioritizes inputs to valuation techniques based on observable and unobservable data and categorizes the inputs into three levels. The levels of the hierarchy are described below.

•Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities;

•Level 2 - Significant observable pricing inputs other than quoted prices included within Level 1 that are, either directly or indirectly, observable as of the reporting date. Essentially, this represents inputs that are derived principally from or corroborated by observable market data; and

•Level 3 - May include one or more unobservable inputs that are significant in establishing a fair value estimate. These unobservable inputs are developed based on the best information available and may include our own internal data.

All assets are held in the Trust for the years ended December 31, 2023 and 2022. See Note 3 for discussion of recurring fair value measurements of the Trust. There were no changes in valuation methods for the year ended December 31, 2023.

(h)Recently Issued Accounting Standards Update

Changes to generally accepted accounting principles are established by the Financial Accounting Standards Board (FASB) in the form of Accounting Standards Updates (ASU) to the FASB Accounting Standards Codification. The Plan considers the applicability and impact of all ASUs. There were no recently issued ASUs adopted by the Plan for the year ended December 31, 2023.

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(4)Investments

The following tables set forth the Trust recurring fair value measurements for each level within the fair value hierarchy at the periods indicated:

	December 31, 2023
	Level 1		Level 2		Level 3		Subtotal		Measured at NAV (c)		Total
	(In thousands)
Assets
Money market fund	$	31,583	$	—	$	—	$	31,583	$	—	$	31,583
Mutual funds (a)	377,485		—		—		377,485		—		377,485
Collective investment trusts (b)	—		—		—		—		479,712		479,712
Common stock of ONEOK, Inc.	218,627		—		—		218,627		—		218,627
Common stock of ONE Gas, Inc. (d)	7,918		—		—		7,918		—		7,918
Total investments, at fair value	$	635,613	$	—	$	—	$	635,613	$	479,712	$	1,115,325

(a) - Party-in-interest transactions include investment in the Fidelity Balance K fund and the Fidelity Emerging Markets Index Fund of $35 million and $3 million respectively, at December 31, 2023.

(b) - This category represents pooled funds that are primarily invested in collective trusts exclusively designed for qualified retirement plans such as the 401(k).

(c) - Plan asset investments measured at fair value using the net asset value per share.

(d) - The common stock of ONE Gas, Inc. is frozen, and no exchanges or new participant or Company contributions may be invested in this investment option.

	December 31, 2022
	Level 1		Level 2		Level 3		Subtotal		Measured at NAV (c)		Total
	(In thousands)
Assets
Money market fund	$	27,128	$	—	$	—	$	27,128	$	—	$	27,128
Mutual funds (a)	256,414		—		—		256,414		—		256,414
Collective investment trusts (b)	—		—		—		—		246,284		246,284
Common stock of ONEOK, Inc.	203,066		—		—		203,066		—		203,066
Common stock of ONE Gas, Inc. (d)	11,306		—		—		11,306		—		11,306
Total investments, at fair value	$	497,914	$	—	$	—	$	497,914	$	246,284	$	744,198

(a) - Party-in-interest transactions include investment in the Fidelity Balance K fund of $27.9 million at December 31, 2022.

(b) - This category represents pooled funds that are primarily invested in collective trusts exclusively designed for qualified retirement plans such as the 401(k).

(c) - Plan asset investments measured at fair value using the net asset value per share.

(d) - The common stock of ONE Gas, Inc. is frozen, and no exchanges or new participant or Company contributions may be invested in this investment option.

(5)Party-in-Interest Transactions

Party-in-interest transactions include those with fiduciaries or employees of the Plan, any person who provides services to the Plan, an employer whose employees participate in the Plan, an employer organization whose members participate in the Plan, a person who owns 50% or more of such an employer or employee association, or relatives of such persons. Transactions in the Trust are managed by the Plan Trustee and Fidelity Investments Institutional Operations Company (Fidelity Investments), the Plan’s record keeper, and therefore transactions with the Plan Trustee and Fidelity Investments qualify as party-in-interest transactions. Additionally, certain investments held within the Trust are in ONEOK, Inc. common stock, the Fidelity Balance K fund and the Fidelity Emerging Markets Index Fund, and therefore these transactions qualify as party-in-interest transactions. Participant loan transactions qualify as party-in-interest transactions. Each party-in-interest transaction with the Plan is intended to satisfy a statutory or regulatory exemption so as to avoid constituting a nonexempt prohibited transaction under ERISA.

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ONEOK, INC. 401(k) PLAN

EIN 73-1520922 PLN 002

Schedule H, Line 4i - Schedule of Assets (Held at End of Year)

December 31, 2023

(In thousands)

Column (a)	Column (b)	Column (c)	Column (d)	Column (e)
Party-in- Interest Identification	Identity of Issuer Borrower, Lessor or Similar Party	Description of Investment, Including Maturity Date, Rate of Interest, Par or Maturity Value	Cost**	Current Value
	Dodge & Cox International Stock Fund Class X	Mutual Fund		20,886
	Dodge & Cox Stock Fund Class X	Mutual Fund		29,799
*	Fidelity Balanced K	Mutual Fund		34,808
*	Fidelity Emerging Markets Index	Mutual Fund		2,509
	JPMorgan Large Cap Growth Fund Class R6	Mutual Fund		57,264
	JPMorgan Small Cap Equity Fund Class R6	Mutual Fund		31,627
	PIMCO Total Return Fund	Mutual Fund		11,712
	TCW Total Return Bond I	Mutual Fund		2,416
	Vanguard Extended Market Index Fund Institutional Shares	Mutual Fund		8,790
	Vanguard FTSE All-World ex-US Index Fund	Mutual Fund		3,237
	Vanguard Institutional Index Fund	Mutual Fund		95,534
	Vanguard Primecap	Mutual Fund		72,897
	Vanguard Total Bond Market Index Fund	Mutual Fund		6,006
	Invesco Stable Value Trust Class B1	Collective Investment Trust		7,178
	Vanguard Target Retirement Income Trust II	Collective Investment Trust		2,937
	Vanguard Target Retirement 2020 Trust II	Collective Investment Trust		10,951
	Vanguard Target Retirement 2025 Trust II	Collective Investment Trust		36,783
	Vanguard Target Retirement 2030 Trust II	Collective Investment Trust		52,253
	Vanguard Target Retirement 2035 Trust II	Collective Investment Trust		66,796
	Vanguard Target Retirement 2040 Trust II	Collective Investment Trust		65,828
	Vanguard Target Retirement 2045 Trust II	Collective Investment Trust		71,762
	Vanguard Target Retirement 2050 Trust II	Collective Investment Trust		72,829
	Vanguard Target Retirement 2055 Trust II	Collective Investment Trust		66,110
	Vanguard Target Retirement 2060 Trust II	Collective Investment Trust		18,330
	Vanguard Target Retirement 2065 Trust II	Collective Investment Trust		6,735
	Vanguard Target Retirement 2070 Trust II	Collective Investment Trust		885
	William Blair International Leaders Collective Investment Fund Class A	Collective Investment Trust		335
	Vanguard Cash Reserves Federal Money Market Fund Admiral Shares	Money Market Mutual Fund		31,583
*	ONEOK, Inc.	Common Stock		218,627
	ONE Gas Inc Stock	Common Stock		7,918
*	Notes receivable from participants	Notes receivable from participants at interest rates ranging from 3.25% to 10.50% and various maturities through 2033.		20,017
	Total			$	1,135,342
* Party-in-interest.
** This column is not applicable to participant-directed investments.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the ONEOK, Inc. 401(k) Plan has duly caused this annual report to be signed on its behalf by the undersigned, hereunto duly authorized.

	ONEOK, Inc. 401(k) Plan
	ONEOK, Inc.
Date: June 21, 2024	By:	/s/ Walter S. Hulse III
		Walter S. Hulse III Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development (Principal Financial Officer)

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EXHIBIT INDEX

Exhibit Number	Description
23		Consent of Independent Registered Public Accounting Firm

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