OKE / ONEOK, Inc. - Pemfailan SEC, Laporan Tahunan, Penyata Proksi

ONEOK, Inc.
US ˙ NYSE ˙ US6826801036

Statistik Asas
LEI 2T3D6M0JSY48PSZI1Q41
CIK 1039684
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to ONEOK, Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan senarai kronologi lengkap bagi Pemfailan SEC, tidak termasuk pemfailan pemilikan yang kami sediakan di tempat lain.
August 13, 2025 EX-4.7

[FORM OF FACE OF NOTE]

EX-4.7 Exhibit 4.7 [FORM OF FACE OF NOTE] [If a Global Security, insert - UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS R

August 13, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 12, 2025 ONEOK, Inc. (Exac

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 12, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Number

August 13, 2025 EX-4.5

[FORM OF FACE OF NOTE]

EX-4.5 Exhibit 4.5 [FORM OF FACE OF NOTE] [If a Global Security, insert - UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS R

August 13, 2025 EX-4.3

ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, ELK MERGER SUB II, L.L.C. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION

EX-4.3 Exhibit 4.3 Execution Version ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, and ELK MERGER SUB II, L.L.C. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee THIRTY-FOURTH SUPPLEMENTAL INDENTURE Dated as of August 12, 2025 to INDENTURE relating to Securiti

August 13, 2025 EX-4.2

ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, ELK MERGER SUB II, L.L.C. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION

EX-4.2 Exhibit 4.2 Execution Version ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, and ELK MERGER SUB II, L.L.C. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee THIRTY-THIRD SUPPLEMENTAL INDENTURE Dated as of August 12, 2025 to INDENTURE relating to Securitie

August 13, 2025 EX-4.4

ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, ELK MERGER SUB II, L.L.C. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION

EX-4.4 Exhibit 4.4 Execution Version ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, and ELK MERGER SUB II, L.L.C. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee THIRTY-FIFTH SUPPLEMENTAL INDENTURE Dated as of August 12, 2025 to INDENTURE relating to Securitie

August 13, 2025 EX-4.6

[FORM OF FACE OF NOTE]

EX-4.6 Exhibit 4.6 [FORM OF FACE OF NOTE] [If a Global Security, insert - UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS R

August 8, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 6, 2025 ONEOK, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 6, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Number)

August 8, 2025 EX-99.1

ONEOK Announces $3.0 Billion Notes Offering

EX-99.1 Exhibit 99.1 Aug. 6, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Alicia Buffer 918-861-3749 ONEOK Announces $3.0 Billion Notes Offering TULSA, Okla. – Aug. 6, 2025 – ONEOK, Inc. (NYSE: OKE) today announced that it has priced an offering to sell $3.0 billion of senior notes, consisting of: • $750 million of 7-year senior notes at a coupon of 4.95%. • $1.0 billion of 10

August 8, 2025 EX-1.1

ONEOK, Inc. Underwriting Agreement

EX-1.1 Exhibit 1.1 Execution Version ONEOK, Inc. Underwriting Agreement August 6, 2025 Mizuho Securities USA LLC 1271 Avenue of the Americas New York, NY 10020 Deutsche Bank Securities Inc. 1 Columbus Circle New York, NY 10019 PNC Capital Markets LLC The Tower at PNC Plaza 300 Fifth Avenue, 10th Floor Pittsburgh, PA 15222 TD Securities (USA) LLC 1 Vanderbilt Ave, 11th Floor New York, New York 1001

August 8, 2025 424B5

$3,000,000,000 ONEOK, Inc. $750,000,000 4.950% Notes due 2032 $1,000,000,000 5.400% Notes due 2035 $1,250,000,000 6.250% Notes due 2055

424B5 Filed Pursuant to Rule 424(b)(5) Registration Statement No. 333-272782 PROSPECTUS SUPPLEMENT (To Prospectus Dated June 20, 2023) $3,000,000,000 ONEOK, Inc. $750,000,000 4.950% Notes due 2032 $1,000,000,000 5.400% Notes due 2035 $1,250,000,000 6.250% Notes due 2055 We are offering $750,000,000 aggregate principal amount of our 4.950% notes due 2032 (the “2032 notes”), $1,000,000,000 aggregate

August 8, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 ONEOK INC /NEW/ Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt 4.

August 7, 2025 FWP

ONEOK, INC. PRICING TERM SHEET   $750,000,000 4.950% Notes due 2032 $1,000,000,000 5.400% Notes due 2035 $1,250,000,000 6.250% Notes due 2055

FWP Filed Pursuant to Rule 433 Registration No. 333-272782 August 6, 2025 ONEOK, INC. PRICING TERM SHEET $3,000,000,000   $750,000,000 4.950% Notes due 2032 $1,000,000,000 5.400% Notes due 2035 $1,250,000,000 6.250% Notes due 2055 Unless otherwise indicated, terms used but not defined herein have the meanings assigned to such terms in the preliminary prospectus supplement dated August 6, 2025 (the

August 6, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 ONEOK INC /NEW/ Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Debt Securities 457(r) 0.

August 6, 2025 424B5

SUBJECT TO COMPLETION, DATED AUGUST 6, 2025

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration Statement No.

August 6, 2025 POSASR

As filed with the Securities and Exchange Commission on August 6, 2025

POSASR As filed with the Securities and Exchange Commission on August 6, 2025 Registration No.

August 5, 2025 EX-10.3

Form of 2025 Performance Unit Award Agreement pursuant to the ONEOK, Inc. 2025 Equity Incentive Plan.

oneok2025eip-formofpsuaw DB1/ 156421375.4 Form of PSU Award Agreement under the 2025 EIP 1 #12701235v2 ONEOK, INC. 2025 EQUITY INCENTIVE PLAN PERFORMANCE UNIT AWARD AGREEMENT This Performance Unit Award Agreement (the “Agreement”) is entered into as of the [] day of [], by and between ONEOK, Inc. (“Company”) and [NAME] (“Grantee”), an employee of Company or a Subsidiary thereof and participant in

August 5, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2025. ☐ Transition Report Pursuant to

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2025. OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to . Commission file number 001-13643 ONEOK, Inc. (Exact

August 5, 2025 EX-22.1

List of subsidiary guarantors and issuers of guaranteed securities.

Exhibit 22.1 List of Subsidiary Guarantors and Issuers of Guaranteed Securities As of June 30, 2025, the following entities guarantee the notes issued by ONEOK, Inc. (the "ONEOK Notes") and ONEOK Partners, L.P. (the "ONEOK Partners Notes"). Entity Jurisdiction of Incorporation or Organization ONEOK Notes ONEOK Partners Notes ONEOK, Inc. Oklahoma Issuer Guarantor ONEOK Partners, L.P. Delaware Guara

August 5, 2025 EX-10.4

Award Agreement pursuant to the ONEOK, Inc. 2025 Equity Incentive Plan.

oneok2025eip-formofrsuaw Form of RSU Agreement under 2025 EIP 1 #12701236v2 DB1/ 156421776.

August 4, 2025 EX-99.1

-more- Aug. 4, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Alicia Buffer 918-861-3749 ONEOK Announces Higher Second Quarter 2025 Earnings and Affirms 2025 Financial Guidance Ranges Record Rocky Mountain Region NGL Raw Feed Throu

okeq22025earningsrelease -more- Aug. 4, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Alicia Buffer 918-861-3749 ONEOK Announces Higher Second Quarter 2025 Earnings and Affirms 2025 Financial Guidance Ranges Record Rocky Mountain Region NGL Raw Feed Throughput Volumes TULSA, Okla. - Aug. 4, 2025 - ONEOK, Inc. (NYSE: OKE) today announced higher second quarter 2025 results and af

August 4, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) August 4, 2025 ONEOK, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) August 4, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

July 17, 2025 EX-99.1

News ONEOK Declares Quarterly Dividend TULSA, Okla. – July 16, 2025 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of $1.03 per share, unchanged from the previous quarter, resulting in an annualized dividend o

oke2qquarterlydividend-n News ONEOK Declares Quarterly Dividend TULSA, Okla. – July 16, 2025 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of $1.03 per share, unchanged from the previous quarter, resulting in an annualized dividend of $4.12 per share. The dividend is payable Aug. 14, 2025, to shareholders of record at the close of business Aug. 1, 2025. -

July 17, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) July 16, 2025 ONEOK, Inc. (Exact n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) July 16, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

July 1, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) June 30, 2025 ONEOK, Inc. (Exact n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) June 30, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

July 1, 2025 EX-99.1

News ONEOK Second Quarter 2025 Conference Call and Webcast Scheduled TULSA, Okla. – June 30, 2025 – ONEOK, Inc. (NYSE: OKE) will release second quarter 2025 earnings after the market closes on Aug. 4, 2025. Members of ONEOK’s management team will par

News ONEOK Second Quarter 2025 Conference Call and Webcast Scheduled TULSA, Okla. – June 30, 2025 – ONEOK, Inc. (NYSE: OKE) will release second quarter 2025 earnings after the market closes on Aug. 4, 2025. Members of ONEOK’s management team will participate in a conference call the following day. What: ONEOK second quarter 2025 earnings conference call and webcast When: 11 a.m. Eastern, Aug. 5, 2

June 25, 2025 11-K

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, 2024 _ TRANSITION REPORT PURSUANT TO SECTION 15(d)

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, 2024 OR TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period fromto Commission file number 001-13643 A.

June 4, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 3, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

June 4, 2025 EX-99.1

News ONEOK Acquires Remaining Interest in Delaware Basin JV Acquisition Advances Permian Basin Growth Strategy TULSA, Okla. – June 3, 2025 – ONEOK, Inc. (NYSE: OKE) today announced the acquisition of the remaining 49.9% interest in Delaware G&P LLC (

a6-3x25delawarebasinjvac News ONEOK Acquires Remaining Interest in Delaware Basin JV Acquisition Advances Permian Basin Growth Strategy TULSA, Okla.

June 3, 2025 S-3ASR

As filed with the Securities and Exchange Commission on June 3, 2025

Table of Contents As filed with the Securities and Exchange Commission on June 3, 2025 Registration No.

June 3, 2025 EX-4.5

Registration Rights Agreement, dated as of May 28, 2025, by and between ONEOK, Inc. and NGP XI Midstream Holdings, L.L.C.

Exhibit 4.5 Execution Version REGISTRATION RIGHTS AGREEMENT by and between ONEOK, INC. and NGP XI MIDSTREAM HOLDINGS, L.L.C. Table of Contents ARTICLE I DEFINITIONS 1 Section 1.1 Definitions 1 Section 1.2 Registrable Securities 3 ARTICLE II REGISTRATION RIGHTS 3 Section 2.1 Shelf Registration 3 Section 2.2 Piggyback Registration 4 Section 2.3 Underwritten Offering 6 Section 2.4 Sale Procedures 7 S

June 3, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) ONEOK, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forwa

May 29, 2025 EX-99.1

News ONEOK to Participate in Investor Conference TULSA, Okla. – May 27, 2025 – ONEOK, Inc. (NYSE: OKE) will participate in an investor conference this week and in a fireside chat session at 2:30 p.m. Eastern Time (1:30 p.m. Central Time) on Wednesday

News ONEOK to Participate in Investor Conference TULSA, Okla. – May 27, 2025 – ONEOK, Inc. (NYSE: OKE) will participate in an investor conference this week and in a fireside chat session at 2:30 p.m. Eastern Time (1:30 p.m. Central Time) on Wednesday, May 28. The session will be webcast live on ONEOK’s website at www.oneok.com. The webcast will also be available for replay. ONEOK’s latest investor

May 29, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 27, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

May 22, 2025 S-8

As filed with the Securities and Exchange Commission on May 22, 2025

As filed with the Securities and Exchange Commission on May 22, 2025 Registration No.

May 22, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 21, 2025 ONEOK, Inc. (Exact na

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 21, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Number) (I

May 22, 2025 EX-10.2

ONEOK, Inc. 2025 Employee Stock Award Program, as amended.

Exhibit 10.2 2025 Employee Stock Award Program Effective May 21, 2025 (As approved by the Shareholders, and as subsequently amended as of May 21, 2025) ONEOK, Inc. (“ONEOK”) hereby establishes the ONEOK, Inc. 2025 Employee Stock Award Program, as may be amended from time to time (the “2025 ESAP”), effective as of the date on which ONEOK’s stockholders approve the 2025 ESAP (the “Effective Date”).

May 22, 2025 EX-10.1

ONEOK, Inc. 2025 Equity Incentive Plan.

Exhibit 10.1 ONEOK, INC. 2025 EQUITY INCENTIVE PLAN Article 1. Establishment, Purpose 1.1. Establishment of the Plan. ONEOK, Inc. hereby establishes the ONEOK, Inc. 2025 Equity Incentive Plan (the “Plan”), effective as of the date of approval by the Company’s shareholders (“Effective Date”). Except as otherwise indicated, capitalized terms are defined in Article 16 below. 1.2. Purposes of the Plan

May 22, 2025 EX-FILING FEES

Filing Fee Table.

Ex-Filing Fees CALCULATION OF FILING FEE TABLES S-8 ONEOK, Inc. Table 1: Newly Registered and Carry Forward Securities Line Item Type Security Type Security Class Title Notes Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Newly Registered Securities Fees to be Paid Equity Common Stock, $0.01 par v

May 8, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

April 30, 2025 EX-3.1

Amended and Restated Certificate of Incorporation of ONEOK, Inc., dated

ex31-okexconformedcoiaso 4918-0271-0330, v. 2 TO: OKLAHOMA SECRETARY OF STATE 2300 N. Lincoln Blvd., Room 101, State Capitol Building Oklahoma City, Oklahoma 73105-4897 (405) 521-2520 AMENDED CERTIFICATE OF INCORPORATION OF ONEOK, INC. The undersigned Oklahoma corporation, for the purpose of amending its amended and restated certificate of incorporation as provided by Section 1077 of the Oklahoma

April 30, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2025. ☐ Transition Report Pursuant to

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2025. OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to . Commission file number 001-13643 ONEOK, Inc. (Exact

April 30, 2025 EX-22.1

List of subsidiary guarantors and issuers of guaranteed securities.

Exhibit 22.1 List of Subsidiary Guarantors and Issuers of Guaranteed Securities As of March 31, 2025, the following entities guarantee the notes issued by ONEOK, Inc. (the "ONEOK Notes"), ONEOK Partners, L.P. (the "ONEOK Partners Notes"), EnLink Midstream, LLC (n/k/a Elk Merger Sub II, L.L.C.) (the "Legacy EnLink Notes") and EnLink Midstream Partners, L.P. (the "Legacy EnLink Partners Notes"). Ent

April 29, 2025 EX-99.1

-more- April 29, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher First Quarter 2025 Earnings; Affirms 2025 Financial Guidance Higher Year-Over-Year Rocky Mountain Region Volumes TULSA,

-more- April 29, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher First Quarter 2025 Earnings; Affirms 2025 Financial Guidance Higher Year-Over-Year Rocky Mountain Region Volumes TULSA, Okla.

April 29, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) April 29, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

April 25, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) April 24, 2025 ONEOK, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) April 24, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

April 25, 2025 EX-99.1

News ONEOK Declares Quarterly Dividend TULSA, Okla. – April 24, 2025 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of $1.03 per share, unchanged from the previous quarter, resulting in an annualized dividend

a04-24x25okedividendxnr News ONEOK Declares Quarterly Dividend TULSA, Okla. – April 24, 2025 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of $1.03 per share, unchanged from the previous quarter, resulting in an annualized dividend of $4.12 per share. The dividend is payable May 15, 2025, to shareholders of record at the close of business May 5, 2025. - At

April 2, 2025 DEF 14A

DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

April 2, 2025 EX-99.1

News ONEOK First Quarter 2025 Conference Call and Webcast Scheduled TULSA, Okla. – April 1, 2025 – ONEOK, Inc. (NYSE: OKE) will release first quarter 2025 earnings after the market closes on April 29, 2025. Members of ONEOK’s management team will par

News ONEOK First Quarter 2025 Conference Call and Webcast Scheduled TULSA, Okla. – April 1, 2025 – ONEOK, Inc. (NYSE: OKE) will release first quarter 2025 earnings after the market closes on April 29, 2025. Members of ONEOK’s management team will participate in a conference call the following day. What: ONEOK first quarter 2025 earnings conference call and webcast When: 11 a.m. Eastern, April 30,

April 2, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) April 1, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

March 3, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Feb. 27, 2025 ONEOK, Inc. (Exact n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Feb. 27, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

March 3, 2025 EX-99.1

News ONEOK Schedules 2025 Annual Meeting of Shareholders; Sets Record Date TULSA, Okla. – Feb. 27, 2025 – ONEOK, Inc. (NYSE: OKE) will hold its 2025 annual meeting of shareholders at 9 a.m. Central Time on May 21, 2025, as a virtual meeting only. The

News ONEOK Schedules 2025 Annual Meeting of Shareholders; Sets Record Date TULSA, Okla.

February 25, 2025 EX-97

Compensation Recoupment Policy of ONEOK, Inc.

DB1/ 138641647.11 COMPENSATION RECOUPMENT POLICY OF ONEOK, INC. Effective as of October 2, 2023 Exhibit 97 1 DB1/ 138641647.11 ARTICLE A. PURPOSE AND GENERAL TERMS Section A-1. Purpose. ONEOK, Inc. (the “Company”) has adopted this Compensation Recoupment Policy (this “Policy”) to: (a) implement a mandatory clawback policy in the event of a Restatement in compliance with the applicable rules of the

February 25, 2025 EX-21

Required information concerning the registrant’s subsidiaries.

Exhibit 21 ONEOK, Inc. SUBSIDIARIES OF THE COMPANY AS OF DECEMBER 31, 2024 Subsidiaries State of Incorporation or Organization Bighorn Gas Gathering, L.L.C. (49.0%) Delaware Bison Prairie Assurance, L.L.C. Oklahoma Black Mesa Holdings, Inc. Delaware Black Mesa Pipeline, Inc. Delaware Black Mesa Pipeline Operations, L.L.C. Delaware Black Mesa Technologies, Inc. Oklahoma Border Midwestern Company De

February 25, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Feb. 24, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

February 25, 2025 EX-10.23

Form of 2025 Restricted Unit Award Agreement, dated as of Feb.

Form of 2025 RSU Agreement under 2018 EIP 1 DB1/ 154849688.4 ONEOK, INC. EQUITY INCENTIVE PLAN RESTRICTED UNIT AWARD AGREEMENT This Restricted Unit Award Agreement (the “Agreement”) is entered into as of the 19th day of February 2025 by and between ONEOK, Inc. (“Company”) and [NAME] (“Grantee”), an employee of Company or a Subsidiary thereof and participant in the ONEOK, Inc. 2018 Equity Incentive

February 25, 2025 EX-99.1

-more- Feb. 24, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces 2025 Financial Guidance and Provides 2026 Growth Outlook Higher 2025 Expectations Driven by Volume Growth, Completed Projects a

-more- Feb. 24, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces 2025 Financial Guidance and Provides 2026 Growth Outlook Higher 2025 Expectations Driven by Volume Growth, Completed Projects and Expanded Operations TULSA, Okla. - Feb. 24, 2025 - ONEOK, Inc. (NYSE: OKE) today announced 2025 financial guidance and provided a 2026 growth outlo

February 25, 2025 EX-10.24

Form of 2025 Performance Unit Award Agreement, dated as of Feb.

DB1/ 154857473.4 Form of 2025 PSU Award Agreement under the 2018 EIP 1 ONEOK, INC. EQUITY INCENTIVE PLAN PERFORMANCE UNIT AWARD AGREEMENT This Performance Unit Award Agreement (the “Agreement”) is entered into as of the 19th day of February 2025, by and between ONEOK, Inc. (“Company”) and [NAME] (“Grantee”), an employee of Company or a Subsidiary thereof and participant in the ONEOK, Inc. 2018 Equ

February 25, 2025 EX-19

Insider Trading Policy

#12695880v2 ONEOK Securities/Insider Trading Policy #12695880v2 ONEOK Securities/Insider Trading Policy Purpose Our employees have a reputation for integrity and high standards for ethical conduct.

February 25, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended Dec. 31, 2024. ☐ TRANSITION REPORT PURSUANT TO SECTION

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended Dec. 31, 2024. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission file number 001-13643 ONEOK, Inc. (Exact name of

February 25, 2025 EX-22.1

List of subsidiary guarantors and issuers of guaranteed securities.

Exhibit 22.1 List of Subsidiary Guarantors and Issuers of Guaranteed Securities As of Dec. 31, 2024, the following entities guarantee the notes issued by ONEOK, Inc. (the "ONEOK Notes") and ONEOK Partners, L.P. (the "ONEOK Partners Notes"). Entity Jurisdiction of Incorporation or Organization ONEOK Notes ONEOK Partners Notes ONEOK, Inc. Oklahoma Issuer Guarantor ONEOK Partners, L.P. Delaware Guara

February 24, 2025 EX-99.1

-more- Feb. 24, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher Fourth Quarter and Full-year 2024 Earnings Completed Projects and Expanded Asset Base Provide a Platform For Growth TULS

-more- Feb. 24, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher Fourth Quarter and Full-year 2024 Earnings Completed Projects and Expanded Asset Base Provide a Platform For Growth TULSA, Okla. - Feb. 24, 2025 - ONEOK, Inc. (NYSE: OKE) today announced higher fourth quarter and full-year 2024 results. Higher Fourth-quarter 2024 Result

February 24, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Feb. 24, 2025 ONEOK, Inc. (Exact n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Feb. 24, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

February 20, 2025 EX-10.2

14, 2025, by and among ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., EnLink Midstream Partners, LP, and Elk Merger Sub II, L.L.C., in favor of Citibank, N.A. (incorporated by reference from Exhibit 10.2 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 10.2 SECOND AMENDED AND RESTATED GUARANTY AGREEMENT THIS SECOND AMENDED AND RESTATED GUARANTY AGREEMENT (this “Agreement”), dated as of February 14, 2025 is made by ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, ONEOK PARTNERS, L.P., MAGELLAN MIDSTREAM PARTNERS, L.P., and ENLINK MIDSTREAM PARTNERS, LP, each a Delaware limited partnership, and ELK MERGER SUB II, L.L.C., a Delaware limited

February 20, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 14, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numb

February 20, 2025 EX-10.1

Second Amended and Restated Credit Agreement, dated as of Feb. 14, 2025, by and amount ONEOK, Inc., as borrower, Citibank, N.A., as administrative ag

Exhibit 10.1 EXECUTION VERSION $3,500,000,000 SECOND AMENDED AND RESTATED CREDIT AGREEMENT Dated as of February 14, 2025 among ONEOK, INC., as the Borrower, CITIBANK, N.A., as Administrative Agent, a Swing Line Lender and an L/C Issuer, and The Other Lenders, Swing Line Lenders and L/C Issuers Party Hereto BANK OF AMERICA, N.A., as Syndication Agent THE BANK OF NOVA SCOTIA, HOUSTON BRANCH, BARCLAY

February 6, 2025 EX-99.1

-more- News ONEOK Announces Joint Ventures with MPLX to Build LPG Export Terminal at Premier Location on U.S. Gulf Coast Expands and Extends Integrated NGL Value Chain TULSA, Okla. – Feb. 4, 2025 – ONEOK, Inc. (NYSE: OKE) and MPLX LP (NYSE: MPLX) hav

-more- News ONEOK Announces Joint Ventures with MPLX to Build LPG Export Terminal at Premier Location on U.

February 6, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Feb. 4, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

February 5, 2025 EX-4.14

31, 2025, by and among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., EnLink Midstream Partners, LP, Elk Merger Sub II, L.L.C. and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.14 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.14 ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P., ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, and ELK MERGER SUB II, L.L.C. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee THIRTY-SECOND SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to INDENTURE Dated as of January 26, 2012 Relating to D

February 5, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): January 31, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numbe

February 5, 2025 EX-4.11

31, 2025, by and among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., EnLink Midstream Partners, LP, Elk Merger Sub II, L.L.C., and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.11 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.11 FOURTEENTH SUPPLEMENTAL INDENTURE FOURTEENTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of January 31, 2025, among ONEOK, Inc., an Oklahoma corporation (“ONEOK”), ONEOK Partners, L.P., a Delaware limited partnership (“ONEOK Partners”), ONEOK Partners Intermediate Limited Partnership, a Delaware limited partnership (“Intermediate Partners”), Magellan Midstream Par

February 5, 2025 EX-4.8

31, 2025, by and among ONEOK, Inc., Elk Merger Sub II, L.L.C., EnLink Midstream Partners, LP, ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and Computershare Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.8 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.8 ONEOK, INC., as Issuer, ELK MERGER SUB II, L.L.C., ENLINK MIDSTREAM PARTNERS, LP, ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, and Magellan Midstream Partners, L.P., as Guarantors, and COMPUTERSHARE TRUST COMPANY, N.A., as Trustee THIRD SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to Indenture dated as of August 15, 2024 5.650% Senior Notes due 2034 Tab

February 5, 2025 EX-4.12

31, 2025, by and among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., EnLink Midstream Partners, LP, Elk Merger Sub II, L.L.C., and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.12 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.12 FOURTH SUPPLEMENTAL INDENTURE FOURTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of January 31, 2025, among ONEOK, Inc., an Oklahoma corporation (“ONEOK”), ONEOK Partners, L.P., a Delaware limited partnership (“ONEOK Partners”), ONEOK Partners Intermediate Limited Partnership, a Delaware limited partnership (“Intermediate Partners”), Magellan Midstream Partners, L

February 5, 2025 EX-4.15

31, 2025, by and among ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, ONEOK, Inc., Magellan Midstream Partners, L.P., EnLink Midstream Partners, LP, Elk Merger Sub II, L.L.C., and Computershare Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.15 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.15 ONEOK PARTNERS, L.P. as Issuer; ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, ONEOK, Inc., MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP and ELK MERGER SUB II, L.L.C. as Guarantors; and COMPUTERSHARE TRUST COMPANY, N.A. as successor to Wells Fargo Bank, N.A., as Trustee SEVENTEENTH SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to INDENTURE Relating to Senio

February 5, 2025 EX-4.10

31, 2025, by and among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., EnLink Midstream Partners, LP, Elk Merger Sub II, L.L.C. and The Bank of New York Mellon Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.10 to ONEOK, Inc.’s Current Report on Form 8-K filed Feb

Exhibit 4.10 ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P., ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, and ELK MERGER SUB II, L.L.C. as Guarantors; and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. as Trustee SEVENTH SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to INDENTURE Relating to Debt Securities Dated as of Septem

February 5, 2025 EX-4.13

31, 2025, by and among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., EnLink Midstream Partners, LP, Elk Merger Sub II, L.L.C. and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.13 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.13 ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P., ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, MAGELLAN MIDSTREAM PARTNERS, L.P., ENLINK MIDSTREAM PARTNERS, LP, and ELK MERGER SUB II, L.L.C. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee SIXTH SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to INDENTURE Dated as of December 28, 2001 Relating to Debt Sec

February 5, 2025 EX-4.7

31, 2025, by and among ONEOK, Inc., Elk Merger Sub II, L.L.C., EnLink Midstream Partners, LP, ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and Computershare Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.7 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.7 ONEOK, INC., as Issuer, ELK MERGER SUB II, L.L.C., ENLINK MIDSTREAM PARTNERS, LP, ONEOK PARTNERS, L.P., ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, and MAGELLAN MIDSTREAM PARTNERS, L.P., as Guarantors, and COMPUTERSHARE TRUST COMPANY, N.A., as Trustee SECOND SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to Indenture dated as of August 31, 2022 6.500% Senior Notes due 2030 Ta

February 5, 2025 EX-10.1

Guaranty Agreement, dated as of January 31, 2025, by and between Elk Merger Sub II, L.L.C. and EnLink Midstream Partners, LP, in favor of Citibank, N.A., as administrative agent, under the Credit Agreement, dated as of June 10, 2022, by and among ONEOK, Inc., Citibank, N.A. and the other lenders parties thereto.

Exhibit 10.1 GUARANTY AGREEMENT JOINDER This Guaranty Agreement Joinder is dated as of January 31, 2025 and is executed by Elk Merger Sub II, L.L.C., a Delaware limited liability company (“Merger Sub II”) and EnLink Midstream Partners, LP, a Delaware limited partnership (“EnLink” and, together with Merger Sub II, the “Additional Guarantors”, and each an “Additional Guarantor”), in favor of Citiban

February 5, 2025 EX-4.9

31, 2025, by and among ONEOK, Inc., EnLink Midstream Partners, LP, Elk Merger Sub II, L.L.C., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and Computershare Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.9 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.9 ONEOK, INC., as Issuer, ENLINK MIDSTREAM PARTNERS, LP, ELK MERGER SUB II, L.L.C., ONEOK PARTNERS, L.P., ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, and MAGELLAN MIDSTREAM PARTNERS, L.P., as Guarantors, and COMPUTERSHARE TRUST COMPANY, N.A., as Trustee SIXTH SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to Indenture dated as of March 19, 2014 4.150% Senior Notes due 2025 4.85

February 5, 2025 EX-4.6

31, 2025, by and among ONEOK, Inc., Elk Merger Sub II, L.L.C., EnLink Midstream Partners, LP, ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and Computershare Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.6 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.6 ONEOK, INC., as Issuer, ELK MERGER SUB II, L.L.C., ENLINK MIDSTREAM PARTNERS, LP, ONEOK PARTNERS, L.P., ONEOK PARTNERS INTERMEDIATE LIMITED PARNTERSHIP, and MAGELLAN MIDSTREAM PARTNERS, L.P., as Guarantors, and COMPUTERSHARE TRUST COMPANY, N.A., as Trustee SECOND SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to Indenture dated as of December 17, 2020 5.625% Senior Notes due 2028

February 5, 2025 EX-4.5

31, 2025, by and among ONEOK, Inc., Elk Merger Sub II, L.L.C., EnLink Midstream Partners, LP, ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and Computershare Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.5 to ONEOK, Inc.’s Current Report on Form 8-K, filed Feb

Exhibit 4.5 ONEOK, INC., as Issuer, ELK MERGER SUB II, L.L.C., ENLINK MIDSTREAM PARTNERS, LP, ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, and Magellan Midstream Partners, L.P., as Guarantors, and COMPUTERSHARE TRUST COMPANY, N.A., as Trustee THIRD SUPPLEMENTAL INDENTURE Dated as of January 31, 2025 to Indenture dated as of April 9, 2019 5.375% Senior Notes due 2029 Table

January 31, 2025 EX-FILING FEES

Filing Fee Table.

Ex-Filing Fees CALCULATION OF FILING FEE TABLES S-8 ONEOK, Inc. Table 1: Newly Registered and Carry Forward Securities Line Item Type Security Type Security Class Title Notes Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Newly Registered Securities Fees to be Paid Equity Common Stock, $0.01 par v

January 31, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): January 31, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numbe

January 31, 2025 S-8

As filed with the SEC on January 31, 2025

As filed with the SEC on January 31, 2025 No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ONEOK, INC. (Exact name of registrant as specified in its charter) Oklahoma 73-1520922 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 100 West Fifth Street Tul

January 31, 2025 EX-99.1

ONEOK Announces Completion of Strategic EnLink Midstream Acquisition Transaction Strengthens ONEOK’s Integrated Value Chain and Further Diversifies Platform

Exhibit 99.1 News Jan. 31, 2025 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Alicia Buffer 918-861-3749 ONEOK Announces Completion of Strategic EnLink Midstream Acquisition Transaction Strengthens ONEOK’s Integrated Value Chain and Further Diversifies Platform TULSA, Okla. – Jan. 31, 2025 – ONEOK, Inc. (NYSE: OKE) (ONEOK) today announced that it has completed its acquisition of EnL

January 30, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

pressUNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Jan. 30, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numb

January 30, 2025 EX-99.1

EnLink Unitholders Approve ONEOK Acquisition of Remaining Public Units Transaction Expected to Close on Jan. 31, 2025

Exhibit 99.1 Jan. 30, 2025 EnLink Unitholders Approve ONEOK Acquisition of Remaining Public Units Transaction Expected to Close on Jan. 31, 2025 TULSA, Okla. – Jan. 30, 2025 – ONEOK, Inc. (NYSE: OKE) (“ONEOK”) and EnLink Midstream, LLC (NYSE: ENLC) (“EnLink”) today announced that EnLink unitholders approved ONEOK’s previously announced acquisition of the remaining publicly held common units of EnL

January 30, 2025 EX-99.1

EnLink Unitholders Approve ONEOK Acquisition of Remaining Public Units Transaction Expected to Close on Jan. 31, 2025

Exhibit 99.1 Jan. 30, 2025 EnLink Unitholders Approve ONEOK Acquisition of Remaining Public Units Transaction Expected to Close on Jan. 31, 2025 TULSA, Okla. – Jan. 30, 2025 – ONEOK, Inc. (NYSE: OKE) (“ONEOK”) and EnLink Midstream, LLC (NYSE: ENLC) (“EnLink”) today announced that EnLink unitholders approved ONEOK’s previously announced acquisition of the remaining publicly held common units of EnL

January 30, 2025 425

pressUNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Jan. 30, 2025 ONEOK, Inc. (Ex

pressUNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Jan. 30, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numb

January 22, 2025 425

Leading Independent Proxy Advisory Firms ISS and Glass Lewis Recommend EnLink Unitholders Vote “FOR” Pending ONEOK Acquisition

Filed by ONEOK, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: EnLink Midstream, LLC Commission File No. 001-36336 Date: January 22, 2025 The following joint press release was issued by ONEOK, Inc. and EnLink Midstream, LLC on January 22, 2025. Jan. 22, 2025 Leading Independent Proxy Adv

January 22, 2025 EX-99.1

News ONEOK Fourth Quarter and Year-end 2024 Conference Call and Webcast Scheduled TULSA, Okla. – Jan. 21, 2025 – ONEOK, Inc. (NYSE: OKE) will release fourth quarter and year-end 2024 earnings after the market closes on Feb. 24, 2025. Members of ONEOK

News ONEOK Fourth Quarter and Year-end 2024 Conference Call and Webcast Scheduled TULSA, Okla.

January 22, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Jan. 21, 2025 ONEOK, Inc. (Exact n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Jan. 21, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

January 7, 2025 EX-99.1

ONEOK Announces Two New Executive Leadership Appointments

Exhibit 99.1 News Jan. 6, 2025 Analyst Contact: Andrew Ziola 918-588-7683 Media Contact: Alicia Buffer 918-861-3749 ONEOK Announces Two New Executive Leadership Appointments TULSA, Okla. – Jan. 6, 2025 – ONEOK, Inc. (NYSE: OKE) today announced two executive leadership appointments, both of which are effective immediately. Randy N. Lentz, chief executive officer and founder of Medallion Midstream,

January 7, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) January 6, 2025 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Number)

January 3, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Dec. 31, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

January 3, 2025 EX-99.1

-more- News ONEOK Closes Sale of Wholly Owned Interstate Natural Gas Pipelines Guardian, Midwestern and Viking Gas Transmission Pipelines Sold to DT Midstream for $1.2 Billion TULSA, Okla. – Dec. 31, 2024 – ONEOK, Inc. (NYSE: OKE) today announced tha

a12-31x24interstatepipel -more- News ONEOK Closes Sale of Wholly Owned Interstate Natural Gas Pipelines Guardian, Midwestern and Viking Gas Transmission Pipelines Sold to DT Midstream for $1.

December 31, 2024 425

Filed by ONEOK, Inc. pursuant to

Filed by ONEOK, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: EnLink Midstream, LLC Commission File No. 001-36336 Date: December 31, 2024 The following communication was distributed to ONEOK, Inc. and EnLink Midstream, LLC employees on December 31, 2024.

December 31, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Dec. 31, 2024 ONEOK, Inc. (Exact n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Dec. 31, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Number) (

December 31, 2024 EX-99.1

Definitive Proxy Statement Filed in Connection with ONEOK’s Pending Acquisition of the Remaining Publicly Held Common Units of EnLink Midstream Special Meeting of EnLink Unitholders Set for Jan. 30, 2025 EnLink’s Board of Directors Recommends Unithol

Exhibit 99.1 Dec. 31, 2024 Definitive Proxy Statement Filed in Connection with ONEOK’s Pending Acquisition of the Remaining Publicly Held Common Units of EnLink Midstream Special Meeting of EnLink Unitholders Set for Jan. 30, 2025 EnLink’s Board of Directors Recommends Unitholders Vote “FOR” All Proposals at the Special Meeting ONEOK Will Vote its EnLink Units “FOR” All Proposals TULSA, Okla. – De

December 31, 2024 424B3

MERGER PROPOSED — YOUR VOTE IS VERY IMPORTANT

Filed Pursuant to Rule 424(b)(3) Registration No. 333-283681 MERGER PROPOSED — YOUR VOTE IS VERY IMPORTANT Dear Unitholder of EnLink Midstream, LLC: On November 24, 2024, EnLink Midstream, LLC (“EnLink”) and ONEOK, Inc. (“ONEOK”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Elk Merger Sub I, L.L.C., a direct, wholly-owned subsidiary of ONEOK (“Merger Sub I”), Elk Merg

December 31, 2024 425

Filed by ONEOK, Inc. pursuant to

Filed by ONEOK, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: EnLink Midstream, LLC Commission File No. 001-36336 Date: December 31, 2024 The following communication was distributed to ONEOK, Inc. and EnLink Midstream, LLC employees on December 31, 2024. EnLink Definitive Proxy Filed, M

December 31, 2024 EX-99.1

Definitive Proxy Statement Filed in Connection with ONEOK’s Pending Acquisition of the Remaining Publicly Held Common Units of EnLink Midstream Special Meeting of EnLink Unitholders Set for Jan. 30, 2025 EnLink’s Board of Directors Recommends Unithol

Exhibit 99.1 Dec. 31, 2024 Definitive Proxy Statement Filed in Connection with ONEOK’s Pending Acquisition of the Remaining Publicly Held Common Units of EnLink Midstream Special Meeting of EnLink Unitholders Set for Jan. 30, 2025 EnLink’s Board of Directors Recommends Unitholders Vote “FOR” All Proposals at the Special Meeting ONEOK Will Vote its EnLink Units “FOR” All Proposals TULSA, Okla. – De

December 31, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Dec. 31, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Number) (

December 27, 2024 CORRESP

ONEOK, Inc. 100 West Fifth Street Tulsa, OK 74103 December 27, 2024

ONEOK, Inc. 100 West Fifth Street Tulsa, OK 74103 December 27, 2024 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Energy & Transportation 100 F Street, N.E. Washington, D.C. 20549 Re: ONEOK, Inc. Registration Statement on Form S-4 Filed December 9, 2024, as amended File No. 333-283681 Ladies and Gentlemen: Pursuant to Rule 461 under the Securi

December 26, 2024 S-4/A

As filed with the Securities and Exchange Commission on December 26, 2024

As filed with the Securities and Exchange Commission on December 26, 2024 No. 333-283681 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 1 to FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ONEOK, INC. (Exact name of registrant as specified in its charter) Oklahoma 4923 73-1520922 (State or other jurisdiction of incorporation or organization) (Primary Stand

December 26, 2024 EX-99.1

Consent of Evercore Group L.L.C.

Exhibit 99.1 CONSENT OF EVERCORE GROUP L.L.C. December 26, 2024 The Conflicts Committee of the Board of Directors of EnLink Midstream Manager, LLC, the managing member of EnLink Midstream, LLC 1722 Routh Street, Suite 1300 Dallas, Texas 75201 Members of the Conflicts Committee of the Board of Directors: We hereby consent to (i) the inclusion of our opinion letter, dated November 24, 2024, to the C

December 26, 2024 EX-99.2

Form of Proxy Card for Special Meeting of EnLink Midstream, LLC.

Exhibit 99.2 Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLY THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. V60435 - S04966 For Against Abstain O O O O O O ENLINK MIDSTREAM, LLC Each of the Conflicts Committee and the Board of Directors reco

December 11, 2024 425

Filed by ONEOK, Inc. pursuant to Rule 425

Filed by ONEOK, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: EnLink Midstream, LLC Commission File No. 001-36336 Date: December 11, 2024 The following communication was distributed to ONEOK, Inc. and EnLink Midstream, LLC employees on December 11, 2024.

December 11, 2024 EX-99.1

News ONEOK to Participate in Investor Conference TULSA, Okla. – Dec. 9, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in an investor conference this week and in a fireside chat session at 11 a.m. Eastern Time (10 a.m. Central Time) on Tuesday, Dec.

News ONEOK to Participate in Investor Conference TULSA, Okla. – Dec. 9, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in an investor conference this week and in a fireside chat session at 11 a.m. Eastern Time (10 a.m. Central Time) on Tuesday, Dec. 10. The session will be webcast live on ONEOK’s website at www.oneok.com. The webcast will also be available for replay. ONEOK’s latest investor mate

December 11, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Dec. 9, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

December 11, 2024 425

2

Filed by ONEOK, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: EnLink Midstream, LLC Commission File No. 001-36336 Date: December 11, 2024 The following communication was distributed to ONEOK, Inc. and EnLink Midstream, LLC employees on December 11, 2024. Form S-4 Filing, including Preli

December 11, 2024 425

ONEOK, Inc. December 10, 2024 11:00 AM EST

Filed by ONEOK, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: EnLink Midstream, LLC Commission File No. 001-36336 Date: December 10, 2024 The following is a transcript of a Fireside Chat held at the Wells Fargo Midstream, Energy and Utilities Symposium on December 10, 2024. ONEOK, Inc.

December 9, 2024 EX-21

List of Subsidiaries of ONEOK, Inc.

Exhibit 21 ONEOK, Inc. SUBSIDIARIES OF THE COMPANY AS OF DECEMBER 9, 2024 Subsidiaries State of Incorporation or Organization Bighorn Gas Gathering, L.L.C. (49.0%) Delaware Bison Prairie Assurance, L.L.C. Oklahoma Black Mesa Holdings, Inc. Delaware Black Mesa Pipeline, Inc. Delaware Black Mesa Pipeline Operations, L.L.C. Delaware Black Mesa Technologies, Inc. Oklahoma Border Midwestern Company Del

December 9, 2024 EX-FILING FEES

Calculation of Filing Fee Table.

Ex-Filing Fees CALCULATION OF FILING FEE TABLES S-4 ONEOK INC /NEW/ Table 1: Newly Registered and Carry Forward Securities Line Item Type Security Type Security Class Title Notes Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Newly Registered Securities Fees to be Paid Equity Common Stock, par value $0.

December 9, 2024 S-4

As filed with the Securities and Exchange Commission on December 9, 2024

As filed with the Securities and Exchange Commission on December 9, 2024 No. 333- SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ONEOK, INC. (Exact name of registrant as specified in its charter) Oklahoma 4923 73-1520922 (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classificat

December 9, 2024 425

Investor Presentation December 2024 Cautionary Statement 3 NO OFFER OR SOLICITATION This presentation is not intended to and shall not constitute an offer to buy or sell or the solicitation of an offer to buy or sell any securities, or a solicitation

Filed by ONEOK, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: EnLink Midstream, LLC Commission File No. 001-36336 Date: December 9, 2024 The following presentation was published on ONEOK, Inc.'s website on December 9, 2024. Investor Presentation December 2024 Cautionary Statement 2 Forw

December 9, 2024 EX-99.1

Consent of Evercore Group L.L.C.

Exhibit 99.1 CONSENT OF EVERCORE GROUP L.L.C. December 9, 2024 The Conflicts Committee of the Board of Directors of EnLink Midstream Manager, LLC, the managing member of EnLink Midstream, LLC 1722 Routh Street, Suite 1300 Dallas, Texas 75201 Members of the Conflicts Committee of the Board of Directors: We hereby consent to (i) the inclusion of our opinion letter, dated November 24, 2024, to the Co

December 5, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Dec. 4, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

December 5, 2024 EX-99.1

-more- News ONEOK Announces Completion of NGL Fractionation and Pipeline Expansion Projects Includes MB-6 NGL Fractionator and Full Looping of the West Texas NGL Pipeline TULSA, Okla. – Dec. 4, 2024 – ONEOK, Inc. (NYSE: OKE) today announced the compl

-more- News ONEOK Announces Completion of NGL Fractionation and Pipeline Expansion Projects Includes MB-6 NGL Fractionator and Full Looping of the West Texas NGL Pipeline TULSA, Okla.

November 26, 2024 SC 13D/A

ENLC / EnLink Midstream, LLC / ONEOK INC /NEW/ - AMENDMENT NO. 1 TO SCHEDULE 13D Activist Investment

SC 13D/A 1 ea0222718-13da1oneokenlink.htm AMENDMENT NO. 1 TO SCHEDULE 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 1) EnLink Midstream, LLC (Name of Issuer) Common Units (Title of Class of Securities) 29336T100 (CUSIP Number) ONEOK, Inc. Attention: Walter S. Hulse, III 100 W. Fifth Street Tulsa,

November 25, 2024 EX-2.1

Agreement and Plan of Merger, dated as of November 24, 2024, by and among ONEOK, Inc., Elk Merger Sub I, L.L.C., Elk Merger Sub II, L.L.C., EnLink Midstream, LLC and EnLink Midstream Manager, LLC.

Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER DATED AS OF NOVEMBER 24, 2024 BY AND AMONG ONEOK, INC. Elk Merger Sub I, L.L.C., Elk Merger Sub II, L.L.C., ENLINK MIDSTREAM, LLC, AND ENLINK MIDSTREAM MANAGER, LLC Table of Contents Article I DEFINED TERMS; CONSTRUCTION 2 Section 1.1 Definitions 2 Section 1.2 Interpretation 12 Article II THE MERGERS 14 Section 2.1 The Mergers 14 Section 2

November 25, 2024 EX-10.1

Support Agreement, dated as of November 24, 2024, by and among ONEOK, Inc. and EnLink Midstream, LLC.

Exhibit 10.1 Execution Version SUPPORT AGREEMENT THIS SUPPORT AGREEMENT, dated as of November 24, 2024 (this “Agreement”), is entered into by and between ONEOK, Inc., an Oklahoma corporation (“Parent”), and EnLink Midstream, LLC, a Delaware limited liability company (the “Company”). Capitalized terms used but not defined in this Agreement shall have the meanings ascribed to them in Section 1. RECI

November 25, 2024 EX-99.1

ONEOK Announces Agreement to Acquire Remaining Publicly Held Common Units in EnLink Midstream in a Tax-Free Transaction Consideration of 0.1412 shares of ONEOK common stock for each outstanding publicly held EnLink common unit

Exhibit 99.1 Nov. 24, 2024 ONEOK Announces Agreement to Acquire Remaining Publicly Held Common Units in EnLink Midstream in a Tax-Free Transaction Consideration of 0.1412 shares of ONEOK common stock for each outstanding publicly held EnLink common unit TULSA, Okla. – Nov. 24, 2024 – ONEOK, Inc. (NYSE: OKE) (“ONEOK”) and EnLink Midstream, LLC (NYSE: ENLC) (“EnLink”) today announced that they have

November 25, 2024 EX-99.2

Intranet Article Title / Email Subject Line:

Exhibit 99.2 Intranet Article Title / Email Subject Line: A Message From Pierce Norton and Jesse Arenivas on Merger Agreement Intranet Article Subtitle: ONEOK Announces Agreement to Acquire Remaining Publicly Held Common Units in EnLink Midstream in a Tax-Free Transaction To All ONEOK and EnLink Employees: We are pleased to share that we’ve taken the next step in our combined journey toward becomi

November 25, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 24, 2024 ONEOK, Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 24, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numb

November 25, 2024 EX-99.2

Intranet Article Title / Email Subject Line:

Exhibit 99.2 Intranet Article Title / Email Subject Line: A Message From Pierce Norton and Jesse Arenivas on Merger Agreement Intranet Article Subtitle: ONEOK Announces Agreement to Acquire Remaining Publicly Held Common Units in EnLink Midstream in a Tax-Free Transaction To All ONEOK and EnLink Employees: We are pleased to share that we’ve taken the next step in our combined journey toward becomi

November 25, 2024 EX-99.1

ONEOK Announces Agreement to Acquire Remaining Publicly Held Common Units in EnLink Midstream in a Tax-Free Transaction Consideration of 0.1412 shares of ONEOK common stock for each outstanding publicly held EnLink common unit

Exhibit 99.1 Nov. 24, 2024 ONEOK Announces Agreement to Acquire Remaining Publicly Held Common Units in EnLink Midstream in a Tax-Free Transaction Consideration of 0.1412 shares of ONEOK common stock for each outstanding publicly held EnLink common unit TULSA, Okla. – Nov. 24, 2024 – ONEOK, Inc. (NYSE: OKE) (“ONEOK”) and EnLink Midstream, LLC (NYSE: ENLC) (“EnLink”) today announced that they have

November 25, 2024 EX-2.1

Agreement and Plan of Merger, dated as of November 24, 2024, by and among ONEOK, Inc., Elk Merger Sub I, L.L.C., Elk Merger Sub II, L.L.C., EnLink Midstream, LLC and EnLink Midstream Manager, LLC.

Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER DATED AS OF NOVEMBER 24, 2024 BY AND AMONG ONEOK, INC. Elk Merger Sub I, L.L.C., Elk Merger Sub II, L.L.C., ENLINK MIDSTREAM, LLC, AND ENLINK MIDSTREAM MANAGER, LLC Table of Contents Article I DEFINED TERMS; CONSTRUCTION 2 Section 1.1 Definitions 2 Section 1.2 Interpretation 12 Article II THE MERGERS 14 Section 2.1 The Mergers 14 Section 2

November 25, 2024 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 24, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numb

November 25, 2024 EX-10.1

24, 2024, by and among ONEOK, Inc. and EnLink Midstream, LLC (incorporated by reference to Exhibit 10.1 to ONEOK, Inc.’s Current Report on Form 8-K, filed Nov

Exhibit 10.1 Execution Version SUPPORT AGREEMENT THIS SUPPORT AGREEMENT, dated as of November 24, 2024 (this “Agreement”), is entered into by and between ONEOK, Inc., an Oklahoma corporation (“Parent”), and EnLink Midstream, LLC, a Delaware limited liability company (the “Company”). Capitalized terms used but not defined in this Agreement shall have the meanings ascribed to them in Section 1. RECI

November 22, 2024 EX-99.1

-more- 283905.02-HOUSR01A - MSW News ONEOK Announces Agreement to Sell Wholly Owned Interstate Natural Gas Pipelines to DT Midstream Assets to be Sold Include Guardian, Midwestern and Viking Gas Transmission TULSA, Okla. – Nov. 19, 2024 – ONEOK, Inc.

-more- 283905.02-HOUSR01A - MSW News ONEOK Announces Agreement to Sell Wholly Owned Interstate Natural Gas Pipelines to DT Midstream Assets to be Sold Include Guardian, Midwestern and Viking Gas Transmission TULSA, Okla. – Nov. 19, 2024 – ONEOK, Inc. (NYSE: OKE) (“ONEOK”) today announced that it has executed a definitive agreement with DT Midstream, Inc. (NYSE: DTM) (“DT Midstream”) under which ON

November 22, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Nov. 19, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

November 13, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Nov. 12, 2024 ONEOK, Inc. (Exact n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Nov. 12, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

November 13, 2024 EX-99.1

News ONEOK to Participate in BofA Securities Global Energy Conference TULSA, Okla. – Nov. 12, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in the BofA Securities Global Energy Conference on Nov. 13, 2024, in Houston. Members of ONEOK’s management

a11-12x24bofaxnr News ONEOK to Participate in BofA Securities Global Energy Conference TULSA, Okla.

October 31, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 31, 2024 ONEOK, Inc. (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 31, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numbe

October 31, 2024 EX-99.1

ONEOK Announces Closing of Medallion Midstream Acquisition Completes Acquisition of the Largest Privately Held Crude Oil Gathering and Transportation System in the Permian’s Midland Basin

Exhibit 99.1 News Oct. 31, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Alicia Buffer 918-861-3749 ONEOK Announces Closing of Medallion Midstream Acquisition Completes Acquisition of the Largest Privately Held Crude Oil Gathering and Transportation System in the Permian’s Midland Basin TULSA, Okla. – Oct. 31, 2024 – ONEOK, Inc. (NYSE: OKE) today announced the successful comple

October 30, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended Sept. 30, 2024. ☐ Transition Report Pursuant to

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended Sept. 30, 2024. OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to . Commission file number 001-13643 ONEOK, Inc. (Exact

October 30, 2024 EX-22.1

List of subsidiary guarantors and issuers of guaranteed securities.

Exhibit 22.1 List of Subsidiary Guarantors and Issuers of Guaranteed Securities As of September 30, 2024, the following entities guarantee the notes issued by ONEOK, Inc. (the "ONEOK Notes") and ONEOK Partners, L.P. (the "ONEOK Partners Notes"). Entity Jurisdiction of Incorporation or Organization ONEOK Notes ONEOK Partners Notes ONEOK, Inc. Oklahoma Issuer Guarantor ONEOK Partners, L.P. Delaware

October 29, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Oct. 29, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

October 29, 2024 EX-99.1

-more- Oct. 29, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher Third Quarter 2024 Earnings; Increases 2024 Financial Guidance Increases Financial Guidance for the Second Time in 2024

-more- Oct. 29, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher Third Quarter 2024 Earnings; Increases 2024 Financial Guidance Increases Financial Guidance for the Second Time in 2024 TULSA, Okla. - Oct. 29, 2024 - ONEOK, Inc. (NYSE: OKE) today announced higher third quarter 2024 results and provided 2024 financial guidance on a con

October 17, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Oct. 16, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

October 17, 2024 EX-99.1

-more- News ONEOK Declares Quarterly Dividend TULSA, Okla. – Oct. 16, 2024 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of 99 cents per share, unchanged from the previous quarter, resulting in an annualized

-more- News ONEOK Declares Quarterly Dividend TULSA, Okla. – Oct. 16, 2024 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of 99 cents per share, unchanged from the previous quarter, resulting in an annualized dividend of $3.96 per share. The dividend is payable Nov. 14, 2024, to shareholders of record at the close of business Nov. 1, 2024. - At ONEOK (NYSE:

October 15, 2024 SC 13D

ENLC / EnLink Midstream, LLC / ONEOK INC /NEW/ - SCHEDULE 13D Activist Investment

SC 13D 1 ea0217588-13doneokenlink.htm SCHEDULE 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 EnLink Midstream, LLC (Name of Issuer) Common Units (Title of Class of Securities) 29336T100 (CUSIP Number) ONEOK, Inc. Attention: Walter S. Hulse, III 100 W. Fifth Street Tulsa, Oklahoma 74103 (918) 588-7000 (Name, Addres

October 15, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 15, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numbe

October 15, 2024 EX-99.1

ONEOK Announces Closing of Controlling Interest in EnLink from Global Infrastructure Partners Announces Expiration of HSR Act Waiting Period Acquisition Expands and Extends Asset Positions in the Permian Basin, Mid-Continent, North Texas and Louisian

Exhibit 99.1 News Oct. 15, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Closing of Controlling Interest in EnLink from Global Infrastructure Partners Announces Expiration of HSR Act Waiting Period Acquisition Expands and Extends Asset Positions in the Permian Basin, Mid-Continent, North Texas and Louisiana TULSA, Okla. – Oct. 15, 2024 –

September 27, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Sept. 26, 2024 ONEOK, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Sept. 26, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

September 27, 2024 EX-99.1

News ONEOK Third Quarter 2024 Conference Call and Webcast Scheduled TULSA, Okla. – Sept. 26, 2024 – ONEOK, Inc. (NYSE: OKE) will release third quarter 2024 earnings after the market closes on Oct. 29, 2024. Members of ONEOK’s management team will par

a9-26x24okeq32024earning News ONEOK Third Quarter 2024 Conference Call and Webcast Scheduled TULSA, Okla.

September 25, 2024 EX-2.01.INS

XBRL INSTANCE DOCUMENT

iso4217:USD 0001039684 oke:UnitedStatesFederalGovernmentMember country:US 2023-01-01 2023-12-31 0001039684 country:US 2023-01-01 2023-12-31 0001039684 2023-01-01 2023-12-31 0001039684 1 2023-01-01 2023-12-31 26314000 26314000 26314000 26314000 26314000 26314000 2.

September 25, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report ONEOK, INC. (Exact Name of the Registrant as Specified in it’s Charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report ONEOK, INC. (Exact Name of the Registrant as Specified in it’s Charter) Oklahoma 1039684 73-1520922 (State or other jurisdiction of (Commission File Number) (IRS Employer Identification No.) incorporation or organization) 100 W. Fifth Street, Tulsa, Oklahoma 74103 (Address of principal exe

September 25, 2024 EX-99.1

Resource Extraction Payment as required by Item 2.01 of this Form.

Exhibit 99.1 Segment Project/Subnational Political Jurisdiction Resource/Extraction Method Governmental Recipient/Country Payment Type Payment Amount (in USD) Fiscal Year (1) (1) Natural gas/Well Federal Government/United States Taxes $26,314,000 2023 (1) The United States federal government levies income taxes at the ONEOK, Inc., level rather than on a per project basis. Total Payments Federal In

September 25, 2024 EX-2.01.SCH

XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT

UNITED STATES United States Federal Government [Member] Natural Gas [Member]

September 24, 2024 EX-4.6

24, 2024, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee, with respect to 5.700% Notes due 2054 (incorporated by reference from Exhibit 4.6 to ONEOK Inc.’s Current Report on Form 8-K, filed

Exhibit 4.6 Execution Version ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP and Magellan Midstream Partners, L.P. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee THIRTIETH SUPPLEMENTAL INDENTURE Dated as of September 24, 2024 to INDENTURE relating to Securities Dated as of January 26, 2012 5.700% Notes due 2054 TABLE OF CONT

September 24, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): September 24, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Num

September 24, 2024 EX-4.4

24, 2024, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee, with respect to 4.750% Notes due 2031 (incorporated by reference from Exhibit 4.4 to ONEOK Inc.’s Current Report on Form 8-K, filed Sept.

Exhibit 4.4 Execution Version ONEOK,INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP and Magellan Midstream Partners, L.P. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee TWENTY-EIGHTH SUPPLEMENTAL INDENTURE Dated as of September 24, 2024 to INDENTURE relating to Securities Dated as of January 26, 2012 4.750% Notes due 2031 TABLE OF C

September 24, 2024 EX-4.2

Twenty-Sixth Supplemental Indenture, dated as of Sept. 24, 2024, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee, with respect to 4.250% Notes due 2027 (incorporated by reference from Exhibit 4.2 to ONEOK Inc.’s Current Report on Form 8-K, filed Sept. 24, 2024 (File No. 1-13643)).

Exhibit 4.2 Execution Version ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP and Magellan Midstream Partners, L.P. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee TWENTY-SIXTH SUPPLEMENTAL INDENTURE Dated as of September 24, 2024 to INDENTURE relating to Securities Dated as of January 26, 2012 4.250% Notes due 2027 TABLE OF C

September 24, 2024 EX-4.5

24, 2024, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee, with respect to 5.050% Notes due 2034 (incorporated by reference from Exhibit 4.5 to ONEOK Inc.’s Current Report on Form 8-K, filed Sept.

Exhibit 4.5 Execution Version ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP and Magellan Midstream Partners, L.P. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee TWENTY-NINTH SUPPLEMENTAL INDENTURE Dated as of September 24, 2024 to INDENTURE relating to Securities Dated as of January 26, 2012 5.050% Notes due 2034 TABLE OF C

September 24, 2024 EX-4.7

24, 2024, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee, with respect to 5.850% Notes due 2064 (incorporated by reference from Exhibit 4.7 to ONEOK Inc.’s Current Report on Form 8-K, filed Sept. 24, 2024 (File No. 1-13643)).

Exhibit 4.7 Execution Version ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP and Magellan Midstream Partners, L.P. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee THIRTY-FIRST SUPPLEMENTAL INDENTURE Dated as of September 24, 2024 to INDENTURE relating to Securities Dated as of January 26, 2012 5.850% Notes due 2064 TABLE OF C

September 24, 2024 EX-4.3

24, 2024, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee, with respect to 4.400% Notes due 2029 (incorporated by reference from Exhibit 4.3 to ONEOK Inc.’s Current Report on Form 8-K, filed Sept. 24, 2024 (File No. 1-13643)).

Exhibit 4.3 Execution Version ONEOK, INC. as Issuer; ONEOK PARTNERS, L.P. ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP and Magellan Midstream Partners, L.P. as Guarantors; and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee TWENTY-SEVENTH SUPPLEMENTAL INDENTURE Dated as of September 24, 2024 to INDENTURE relating to Securities Dated as of January 26, 2012 4.400% Notes due 2029 TABLE OF

September 16, 2024 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): September 10, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Num

September 16, 2024 EX-1.1

10, 2024, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and J.P. Morgan Securities LLC, Goldman Sachs & Co. LLC, Barclays Capital Inc., BofA Securities, Inc., and Wells Fargo Securities, LLC, as representatives of the underwriters named therein (incorporated by reference from Exhibit 1.1 to ONEOK Inc.’s Current Report on Form 8-K, filed Sept. 16, 2024 (File No. 1-13643)).

Exhibit 1.1 Execution Version ONEOK, Inc. Underwriting Agreement September 10, 2024 J.P. Morgan Securities LLC 383 Madison Avenue New York, New York 10179 Goldman Sachs & Co. LLC 200 West Street New York, NY 10282-2198 Barclays Capital Inc. 745 Seventh Avenue New York, NY 10019 BofA Securities, Inc. One Bryant Park New York, NY 10036 Wells Fargo Securities, LLC 550 South Tryon Street, 5th Floor Ch

September 16, 2024 EX-99.1

ONEOK Announces $7.0 Billion Notes Offering

Exhibit 99.1 Sept. 10, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces $7.0 Billion Notes Offering TULSA, Okla. – Sept. 10, 2024 – ONEOK, Inc. (NYSE: OKE) today announced that it has priced an offering to sell $7.0 billion of senior notes, consisting of: ● $1.25 billion of 3-year senior notes at a coupon of 4.25%. ● $600 million of 5-year

September 13, 2024 EX-FILING FEES

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables S-3 ONEOK INC /NEW/ Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt 4.

September 13, 2024 424B5

$7,000,000,000 ONEOK, Inc. $1,250,000,000 4.250% Notes due 2027 $600,000,000 4.400% Notes due 2029 $1,250,000,000 4.750% Notes due 2031 $1,600,000,000 5.050% Notes due 2034 $1,500,000,000 5.700% Notes due 2054 $800,000,000 5.850% Notes due 2064

Filed Pursuant to Rule 424(b)(5) Registration Statement No. 333-272782 PROSPECTUS SUPPLEMENT (To Prospectus Dated June 20, 2023) CONFIDENTIAL $7,000,000,000 ONEOK, Inc. $1,250,000,000 4.250% Notes due 2027 $600,000,000 4.400% Notes due 2029 $1,250,000,000 4.750% Notes due 2031 $1,600,000,000 5.050% Notes due 2034 $1,500,000,000 5.700% Notes due 2054 $800,000,000 5.850% Notes due 2064 We are offeri

September 11, 2024 FWP

ONEOK, INC. PRICING TERM SHEET $7,000,000,000 $1,250,000,000 4.250% Notes due 2027 $600,000,000 4.400% Notes due 2029 $1,250,000,000 4.750% Notes due 2031 $1,600,000,000 5.050% Notes due 2034 $1,500,000,000 5.700% Notes due 2054 $800,000,000 5.850% N

Filed Pursuant to Rule 433 Registration No. 333-272782 September 10, 2024 ONEOK, INC. PRICING TERM SHEET $7,000,000,000 $1,250,000,000 4.250% Notes due 2027 $600,000,000 4.400% Notes due 2029 $1,250,000,000 4.750% Notes due 2031 $1,600,000,000 5.050% Notes due 2034 $1,500,000,000 5.700% Notes due 2054 $800,000,000 5.850% Notes due 2064 Unless otherwise indicated, terms used but not defined herein

September 10, 2024 POSASR

As filed with the Securities and Exchange Commission on September 10, 2024

As filed with the Securities and Exchange Commission on September 10, 2024 Registration No.

September 10, 2024 EX-FILING FEES

Filing Fee Table

Calculation of Filing Fee Tables S-3 ONEOK INC /NEW/ Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Debt Securities 457(r) 0.

September 10, 2024 EX-5.3

Opinion of Kirkland & Ellis LLP as to the legality of the guarantees covered by this Post-Effective Amendment No. 1 to Form S-3.

Exhibit 5.3 609 Main Street Houston, TX 77002 United States +1 713 836 3600 www.kirkland.com Facsimile: +1 713 836 3601 September 10, 2024 ONEOK, Inc. 100 West Fifth Street Tulsa, Oklahoma 74103 Re: ONEOK, Inc. Post-Effective Amendment No. 1 to Registration Statement on Form S-3ASR We are issuing this opinion in our capacity as special legal counsel to ONEOK, Inc., an Oklahoma corporation (the “Co

September 10, 2024 424B5

SUBJECT TO COMPLETION, DATED SEPTEMBER 10, 2024

Filed Pursuant to Rule 424(b)(5) Registration Statement No. 333-272782 The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying base prospectus are not an offer to sell the securities described herein and they are not soliciting any offers to buy such securities in any jurisdiction where such offer or

September 4, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) Sept. 3, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

September 4, 2024 EX-99.1

News ONEOK to Participate in Barclays CEO Energy-Power Conference TULSA, Okla. – Sept. 3, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in the Barclays CEO Energy-Power Conference Sept. 4-5, 2024, in New York. Members of ONEOK’s management team wil

News ONEOK to Participate in Barclays CEO Energy-Power Conference TULSA, Okla. – Sept. 3, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in the Barclays CEO Energy-Power Conference Sept. 4-5, 2024, in New York. Members of ONEOK’s management team will participate in a fireside chat session at 2:25 p.m. Eastern Time (1:25 p.m. Central Time) on Wednesday, Sept. 4. The session will be webcast live on

August 30, 2024 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 28, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Number

August 30, 2024 EX-2.1

Purchase Agreement, dated as of August 28, 2024, by and among ONEOK, Inc., GIP III Stetson I, L.P., GIP III Stetson II, L.P. and EnLink Midstream Manager, LLC (incorporated by reference to Exhibit 2.1 to ONEOK, Inc.’s Current Report on Form 8-K filed on August 30, 2024 (File No. 1-13643)).

Exhibit 2.1 Execution Version PURCHASE AGREEMENT BY AND AMONG GIP III STETSON I, L.P. AND GIP III STETSON II, L.P. AS SELLERS, ENLINK MIDSTREAM MANAGER, LLC, AND ONEOK, INC. AS ACQUIROR TABLE OF CONTENTS Page Article I DEFINITIONS AND INTERPRETATION 1 Section 1.1 Definitions 1 Section 1.2 Rules of Interpretation 1 Article II SALE AND PURCHASE 3 Section 2.1 Sale and Purchase 3 Section 2.2 Pre-Closi

August 30, 2024 EX-2.2

28, 2024, by and among ONEOK, Inc., GIP III Trophy GP 2, LLC, GIP III Trophy Acquisition Partners, L.P. and Medallion Management, L.P. (incorporated by reference from Exhibit 2.2 to ONEOK Inc.’s Current Report on Form 8-K, filed Aug. 30, 2024 (File No. 1-13643)).

Exhibit 2.2 CONFIDENTIAL Execution Version PURCHASE AND SALE AGREEMENT BY AND AMONG GIP III TROPHY GP 2, LLC, GIP III TROPHY ACQUISITION PARTNERS, L.P., MEDALLION MANAGEMENT, L.P. AND ONEOK, INC. August 28, 2024 TABLE OF CONTENTS Article I DEFINITIONS AND CONSTRUCTION 1 Section 1.01 Definitions 1 Section 1.02 Rules of Construction 19 Article II PURCHASE AND SALE; CLOSING 20 Section 2.01 Purchase a

August 30, 2024 EX-99.1

ONEOK to Acquire Medallion and Controlling Interest in EnLink from Global Infrastructure Partners in Transactions Valued at $5.9 Billion Establishes fully integrated Permian Basin platform at scale Expands and extends footprint in Mid-Continent, Nort

Exhibit 99.1 News Aug. 28, 2024 ONEOK to Acquire Medallion and Controlling Interest in EnLink from Global Infrastructure Partners in Transactions Valued at $5.9 Billion Establishes fully integrated Permian Basin platform at scale Expands and extends footprint in Mid-Continent, North Texas and Louisiana Delivers immediate accretion to EPS and FCF supporting capital allocation strategy Provides sign

August 13, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) August 12, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation

August 13, 2024 EX-99.1

News ONEOK to Participate in Citi Midstream and New Energy Infrastructure Conference TULSA, Okla. – Aug. 12, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in investor meetings at the Citi Midstream and New Energy Infrastructure Conference, Aug. 13-

News ONEOK to Participate in Citi Midstream and New Energy Infrastructure Conference TULSA, Okla.

August 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2024. ☐ Transition Report Pursuant to

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2024. OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to . Commission file number 001-13643 ONEOK, Inc. (Exact

August 6, 2024 EX-22

List of subsidiary guarantors and issuers of guaranteed securities.

Exhibit 22.1 List of Subsidiary Guarantors and Issuers of Guaranteed Securities As of June 30, 2024, the following entities guarantee the notes issued by ONEOK, Inc. (the "ONEOK Notes") and ONEOK Partners, L.P. (the "ONEOK Partners Notes"). Entity Jurisdiction of Incorporation or Organization ONEOK Notes ONEOK Partners Notes ONEOK, Inc. Oklahoma Issuer Guarantor ONEOK Partners, L.P. Delaware Guara

August 5, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) August 5, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

August 5, 2024 EX-99.1

-more- August 5, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher Second Quarter 2024 Earnings; Affirms 2024 Financial Guidance Record Rocky Mountain Region Volumes TULSA, Okla. - Aug.

-more- August 5, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher Second Quarter 2024 Earnings; Affirms 2024 Financial Guidance Record Rocky Mountain Region Volumes TULSA, Okla.

August 2, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) August 1, 2024 ONEOK, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) August 1, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

August 2, 2024 EX-99.1

News ONEOK Issues Annual Corporate Sustainability Report TULSA, Okla. – Aug. 1, 2024 – ONEOK, Inc. (NYSE: OKE) today announced the release of its annual Corporate Sustainability Report highlighting the company's progress and commitment toward environ

a8-1x24okecsrreleasexnr News ONEOK Issues Annual Corporate Sustainability Report TULSA, Okla.

July 19, 2024 EX-99.1

-more- News ONEOK Announces Refined Products Pipeline Expansion to the Greater Denver Area Includes Expanded Connectivity with Denver International Airport TULSA, Okla. – July 18, 2024 – ONEOK, Inc. (NYSE: OKE) today announced plans to expand its pip

-more- News ONEOK Announces Refined Products Pipeline Expansion to the Greater Denver Area Includes Expanded Connectivity with Denver International Airport TULSA, Okla.

July 19, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) July 18, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

July 18, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) July 17, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

July 18, 2024 EX-99.1

News ONEOK Declares Quarterly Dividend TULSA, Okla. – July 17, 2024 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of 99 cents per share, unchanged from the previous quarter, resulting in an annualized dividen

News ONEOK Declares Quarterly Dividend TULSA, Okla. – July 17, 2024 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of 99 cents per share, unchanged from the previous quarter, resulting in an annualized dividend of $3.96 per share. The dividend is payable Aug. 14, 2024, to shareholders of record at the close of business Aug. 1, 2024. - At ONEOK (NYSE: OKE),

July 9, 2024 EX-99.1

News ONEOK Second Quarter 2024 Conference Call and Webcast Scheduled TULSA, Okla. – July 8, 2024 – ONEOK, Inc. (NYSE: OKE) will release second quarter 2024 earnings after the market closes on Aug. 5, 2024. ONEOK’s executive management will participat

News ONEOK Second Quarter 2024 Conference Call and Webcast Scheduled TULSA, Okla. – July 8, 2024 – ONEOK, Inc. (NYSE: OKE) will release second quarter 2024 earnings after the market closes on Aug. 5, 2024. ONEOK’s executive management will participate in a conference call the following day. What: ONEOK second quarter 2024 earnings conference call and webcast When: 11 a.m. Eastern, Aug. 6, 2024 10

July 9, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) July 8, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

June 21, 2024 11-K

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 _ TRANSITION REPORT PURSUANT TO SECTION 15(d)

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 fromto Commission file number 001-13643 A.

June 20, 2024 EX-99.1

News Magellan Midstream’s 2023 Schedule K-3 Now Available TULSA, Okla. – June 18, 2024 – ONEOK, Inc. (NYSE: OKE) today announced that the 2023 Schedule K-3s for Magellan Midstream Partners, L.P. (Magellan), reflecting items of international tax relev

News Magellan Midstream’s 2023 Schedule K-3 Now Available TULSA, Okla. – June 18, 2024 – ONEOK, Inc. (NYSE: OKE) today announced that the 2023 Schedule K-3s for Magellan Midstream Partners, L.P. (Magellan), reflecting items of international tax relevance, are now available online. Former Magellan unitholders requiring this information may access their Schedule K-3 at www.taxpackagesupport.com/mmp.

June 20, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) June 18, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

June 18, 2024 EX-99.1

News ONEOK to Participate in J.P. Morgan Energy, Power and Renewables Conference TULSA, Okla. – June 17, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in investor meetings at the J.P. Morgan Energy, Power and Renewables Conference on June 18, 2024,

News ONEOK to Participate in J.P. Morgan Energy, Power and Renewables Conference TULSA, Okla. – June 17, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in investor meetings at the J.P. Morgan Energy, Power and Renewables Conference on June 18, 2024, in New York. ONEOK’s latest investor materials are available at www.oneok.com. - At ONEOK (NYSE: OKE), we deliver energy products and services vital

June 18, 2024 EX-99.1

-more- News ONEOK Completes Acquisition of Gulf Coast NGL System Latest Acquisition Accelerates Commercial Synergies for ONEOK TULSA, Okla. – June 17, 2024 – ONEOK, Inc. (NYSE: OKE) today announced that it has completed its acquisition of a system of

a06-17x2024oneoknglacqui -more- News ONEOK Completes Acquisition of Gulf Coast NGL System Latest Acquisition Accelerates Commercial Synergies for ONEOK TULSA, Okla.

June 18, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) June 17, 2024 ONEOK, Inc. (Exact n

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) June 17, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

June 18, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) June 17, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

May 29, 2024 EX-99.1

News ONEOK to Participate in Bernstein Strategic Decisions Conference TULSA, Okla. – May 28, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in investor meetings at the Bernstein Strategic Decisions Conference May 29-30, 2024, in New York. ONEOK’s la

News ONEOK to Participate in Bernstein Strategic Decisions Conference TULSA, Okla.

May 29, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 28, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

May 24, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 22, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

May 14, 2024 EX-99.1

-more- News ONEOK to Acquire Strategic Gulf Coast NGL Pipelines for $280 million Accelerates Commercial Synergies From Magellan Acquisition TULSA, Okla. – May 13, 2024 – ONEOK, Inc. (NYSE: OKE) today announced that it has agreed to acquire a system o

-more- News ONEOK to Acquire Strategic Gulf Coast NGL Pipelines for $280 million Accelerates Commercial Synergies From Magellan Acquisition TULSA, Okla.

May 14, 2024 EX-99.1

News ONEOK to Participate in Citi Energy and Climate Technology Conference TULSA, Okla. – May 13, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in investor meetings at the Citi Energy and Climate Technology Conference on May 14, 2024, in Boston. ON

News ONEOK to Participate in Citi Energy and Climate Technology Conference TULSA, Okla.

May 14, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 13, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

May 14, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 13, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation) F

May 10, 2024 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) May 8, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Number) (IR

May 10, 2024 EX-10.1

Extension Agreement, dated as of May 8, 2024, among ONEOK, Inc., as borrower, ONEOK Partners Intermediate Limited Partnership, ONEOK Partners, L.P. and Magellan Midstream Partners, L.P., as guarantors, the lenders party thereto, and Citibank, N.A., as administrative agent, swingline lender and letter of credit issuer.

Exhibit 10.1 EXECUTION VERSION EXTENSION AGREEMENT (Extension of Maturity Date Pursuant to Section 2.15 of the Credit Agreement) This EXTENSION AGREEMENT (this “Agreement”) dated as of May 8, 2024 (the “Extension Effective Date”) is entered into by and among ONEOK, INC., an Oklahoma corporation (“Borrower”), ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP, a Delaware limited partnership (“Intermed

May 8, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

May 1, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2024. ☐ Transition Report Pursuant to

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2024. OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to . Commission file number 001-13643 ONEOK, Inc. (Exact

May 1, 2024 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Amendment No. 1) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Amendment No. 1) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defi

May 1, 2024 EX-22.1

List of subsidiary guarantors and issuers of guaranteed securities.

Exhibit 22.1 List of Subsidiary Guarantors and Issuers of Guaranteed Securities As of March 31, 2024, the following entities guarantee the notes issued by ONEOK, Inc. (the "ONEOK Notes") and ONEOK Partners, L.P. (the "ONEOK Partners Notes"). Entity Jurisdiction of Incorporation or Organization ONEOK Notes ONEOK Partners Notes ONEOK, Inc. Oklahoma Issuer Guarantor ONEOK Partners, L.P. Delaware Guar

April 30, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) April 30, 2024 ONEOK, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) April 30, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

April 30, 2024 EX-99.1

-more- April 30, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces First Quarter 2024 Earnings; Increases 2024 Financial Guidance Higher Year-Over-Year Rocky Mountain Region Volumes Volume Mome

-more- April 30, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces First Quarter 2024 Earnings; Increases 2024 Financial Guidance Higher Year-Over-Year Rocky Mountain Region Volumes Volume Momentum Contributes to Higher 2024 Financial Expectations TULSA, Okla.

April 19, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) April 18, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

April 19, 2024 EX-99.1

News ONEOK Declares Quarterly Dividend TULSA, Okla. – April 18, 2024 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of 99 cents per share, unchanged from the previous quarter, resulting in an annualized divide

News ONEOK Declares Quarterly Dividend TULSA, Okla. – April 18, 2024 – The board of directors of ONEOK, Inc. (NYSE: OKE) today declared a quarterly dividend of 99 cents per share, unchanged from the previous quarter, resulting in an annualized dividend of $3.96 per share. The dividend is payable May 15, 2024, to shareholders of record at the close of business May 1, 2024. - At ONEOK (NYSE: OKE), w

April 4, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

April 3, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

March 29, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) March 28, 2024 ONEOK, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) March 28, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

March 29, 2024 EX-99.1

News ONEOK First Quarter 2024 Conference Call and Webcast Scheduled TULSA, Okla. – March 28, 2024 – ONEOK, Inc. (NYSE: OKE) will release first quarter 2024 earnings after the market closes on April 30, 2024. ONEOK’s executive management will particip

News ONEOK First Quarter 2024 Conference Call and Webcast Scheduled TULSA, Okla. – March 28, 2024 – ONEOK, Inc. (NYSE: OKE) will release first quarter 2024 earnings after the market closes on April 30, 2024. ONEOK’s executive management will participate in a conference call the following day. What: ONEOK first quarter 2024 earnings conference call and webcast When: 11 a.m. Eastern, May 1, 2024 10

March 28, 2024 EX-99.1

News ONEOK to Participate in J.P. Morgan Utilities & Midstream Forum TULSA, Okla. – March 27, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in investor meetings at the J.P. Morgan Utilities & Midstream Forum on March 28, 2024, in Chicago. ONEOK’s l

News ONEOK to Participate in J.P. Morgan Utilities & Midstream Forum TULSA, Okla. – March 27, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in investor meetings at the J.P. Morgan Utilities & Midstream Forum on March 28, 2024, in Chicago. ONEOK’s latest investor materials are available at www.oneok.com. - At ONEOK (NYSE: OKE), we deliver energy products and services vital to an advancing world.

March 28, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) March 27, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

March 5, 2024 EX-99.1

News ONEOK to Participate in Upcoming Investor Conferences TULSA, Okla. – March 4, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in the following investor conferences in March 2024: • March 5: Morgan Stanley Energy and Power Conference. • March 6:

News ONEOK to Participate in Upcoming Investor Conferences TULSA, Okla. – March 4, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in the following investor conferences in March 2024: • March 5: Morgan Stanley Energy and Power Conference. • March 6: Barclays Investment Grade Energy and Pipeline Corporate Days. ONEOK’s latest investor materials are available at www.oneok.com. - At ONEOK (NYSE: OKE)

March 5, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) March 4, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation)

March 1, 2024 EX-99.1

News ONEOK Schedules 2024 Annual Meeting of Shareholders; Sets Record Date TULSA, Okla. – Feb. 29, 2024 – ONEOK, Inc. (NYSE: OKE) will hold its 2024 annual meeting of shareholders at 9 a.m. Central Daylight Time (CDT) on May 22, 2024, as a virtual me

News ONEOK Schedules 2024 Annual Meeting of Shareholders; Sets Record Date TULSA, Okla.

March 1, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) February 29, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporati

February 27, 2024 EX-10.24

Form of 2024 Restricted Unit Award Agreement, dated February

1 ONEOK, INC. EQUITY INCENTIVE PLAN RESTRICTED UNIT AWARD AGREEMENT This Restricted Unit Award Agreement (the “Agreement”) is entered into as of the day of , 2024 by and between ONEOK, Inc. (the “Company”) and (the “Grantee”), an employee of the Company or a Subsidiary thereof and participant in the ONEOK, Inc. Equity Incentive Plan (the “Plan”), pursuant to the terms of the Plan. 1. Restricted Un

February 27, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023. ☐ TRANSITION REPORT PURSUANT TO SECT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission file number 001-13643 ONEOK, Inc. (Exact name

February 27, 2024 EX-22.1

List of subsidiary guarantors and issuers of guaranteed securities.

List of Subsidiary Guarantors and Issuers of Guaranteed Securities As of December 31, 2023, the following entities guarantee the notes issued by ONEOK, Inc.

February 27, 2024 EX-10.25

Form of 2024 Performance Unit Award Agreement, dated February

DB1/ 144030261.4 1 ONEOK, INC. EQUITY INCENTIVE PLAN PERFORMANCE UNIT AWARD AGREEMENT This Performance Unit Award Agreement (the “Agreement”) is entered into as of the day of , 2024, by and between ONEOK, Inc. (the “Company”) and (the “Grantee”), an employee of the Company or a Subsidiary thereof and participant in the ONEOK, Inc. Equity Incentive Plan (the “Plan”), pursuant to the terms of the Pl

February 27, 2024 EX-97

Compensation Recoupment Policy of ONEOK, Inc

DB1/ 138641647.11 COMPENSATION RECOUPMENT POLICY OF ONEOK, INC. Effective as of October 2, 2023 Exhibit 97 1 DB1/ 138641647.11 ARTICLE A. PURPOSE AND GENERAL TERMS Section A-1. Purpose. ONEOK, Inc. (the “Company”) has adopted this Compensation Recoupment Policy (this “Policy”) to: (a) implement a mandatory clawback policy in the event of a Restatement in compliance with the applicable rules of the

February 27, 2024 EX-21

Required information concerning the registrant’s subsidiaries.

Exhibit 21 ONEOK, Inc. SUBSIDIARIES OF THE COMPANY AS OF DECEMBER 31, 2023 Subsidiaries State of Incorporation or Organization Bighorn Gas Gathering, L.L.C. (49.0%) Delaware Bison Prairie Assurance, L.L.C. Oklahoma Black Mesa Holdings, Inc. Delaware Black Mesa Pipeline, Inc. Delaware Black Mesa Pipeline Operations, L.L.C. Delaware Black Mesa Technologies, Inc. Oklahoma Border Midwestern Company De

February 26, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) February 26, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporati

February 26, 2024 EX-99.1

-more- February 26, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher Fourth Quarter and Full-year 2023 Earnings Record Rocky Mountain Region Volumes Announces 2024 Financial Guidance TU

-more- February 26, 2024 Analyst Contact: Megan Patterson 918-561-5325 Media Contact: Brad Borror 918-588-7582 ONEOK Announces Higher Fourth Quarter and Full-year 2023 Earnings Record Rocky Mountain Region Volumes Announces 2024 Financial Guidance TULSA, Okla.

February 22, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) February 21, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporati

February 13, 2024 SC 13G/A

OKE / ONEOK, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01613-oneokinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 14)* Name of issuer: ONEOK Inc Title of Class of Securities: Common Stock CUSIP Number: 682680103 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursu

January 23, 2024 EX-99.1

News ONEOK to Participate in U.S. Capital Advisors Midstream Corporate Access Day TULSA, Okla. – Jan. 22, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in the U.S. Capital Advisors Midstream Corporate Access Day on Jan. 23, 2024, in Houston. ONEOK’

News ONEOK to Participate in U.S. Capital Advisors Midstream Corporate Access Day TULSA, Okla. – Jan. 22, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in the U.S. Capital Advisors Midstream Corporate Access Day on Jan. 23, 2024, in Houston. ONEOK’s latest investor materials are available at www.oneok.com. - At ONEOK (NYSE: OKE), we deliver energy products and services vital to an advancing worl

January 23, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) January 22, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporatio

January 19, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) January 18, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporatio

January 19, 2024 EX-99.1

News ONEOK Fourth Quarter and Year-end 2023 Conference Call and Webcast Scheduled TULSA, Okla. – Jan. 18, 2024 – ONEOK, Inc. (NYSE: OKE) will release fourth quarter and year-end 2023 earnings after the market closes on Feb. 26, 2024. ONEOK's executiv

News ONEOK Fourth Quarter and Year-end 2023 Conference Call and Webcast Scheduled TULSA, Okla.

January 18, 2024 EX-99.1

-more- News ONEOK Increases Quarterly Dividend and Announces Share Repurchase Program Raises Quarterly Dividend 3.7% Authorizes $2 Billion Share Repurchase Program Combination of Dividends and Share Repurchases to Target 75% to 85% of Cash Flow From

-more- News ONEOK Increases Quarterly Dividend and Announces Share Repurchase Program Raises Quarterly Dividend 3.

January 18, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) January 17, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporatio

January 9, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) January 8, 2024 ONEOK, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) January 8, 2024 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporation

January 9, 2024 EX-99.1

News ONEOK to Participate in UBS Global Energy and Utilities Winter Conference TULSA, Okla. – Jan. 8, 2024 – ONEOK, Inc. (NYSE: OKE) will participate in the UBS Global Energy and Utilities Winter Conference Jan. 9-10, 2024, in Park City, Utah. ONEOK’

News ONEOK to Participate in UBS Global Energy and Utilities Winter Conference TULSA, Okla.

December 14, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 13, 2023 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction of incorporation) (Commission File Numb

December 14, 2023 EX-4.1

Third Supplemental Indenture, dated as of December 13, 2023, by and among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference from Exhibit 4.1 to ONEOK Inc.’s Current Report on Form 8-K filed December 14, 2023 (File No. 1-13643)).

Exhibit 4.1 Execution Version THIRD SUPPLEMENTAL INDENTURE THIRD SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of December 13, 2023, among Magellan Midstream Partners, L.P., a Delaware limited partnership (the “Partnership” and the “New Guarantor”), ONEOK, Inc., an Oklahoma corporation (“ONEOK”), ONEOK Partners, L.P., a Delaware limited partnership (“ONEOK Partners”), and ONEOK

December 14, 2023 EX-4.2

Thirteenth Supplemental Indenture, dated as of Dec. 13, 2023, by and among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P. and U.S. Bank Trust Company, National Association, as trustee, (incorporated by reference from Exhibit 4.2 to ONEOK Inc.’s Current Report on Form 8-K filed Dec. 14, 2023 (File No. 1-13643)).

Exhibit 4.2 Execution Version THIRTEENTH SUPPLEMENTAL INDENTURE THIRTEENTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of December 13, 2023, among Magellan Midstream Partners, L.P., a Delaware limited partnership (the “Partnership” and the “New Guarantor”), ONEOK, Inc., an Oklahoma corporation (“ONEOK”), ONEOK Partners, L.P., a Delaware limited partnership (“ONEOK Partners”),

December 7, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) December 5, 2023 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporatio

December 7, 2023 EX-99.1

News ONEOK to Participate in Wells Fargo Midstream and Utilities Symposium TULSA, Okla. – Dec. 5, 2023 – ONEOK, Inc. (NYSE: OKE) will participate in the Wells Fargo Midstream and Utilities Symposium Dec. 6-7, 2023, in New York. ONEOK management will

a12-5x23wellsfargoxnr News ONEOK to Participate in Wells Fargo Midstream and Utilities Symposium TULSA, Okla.

November 15, 2023 EX-99.1

News ONEOK to Participate in BofA Securities Global Energy Conference TULSA, Okla. – Nov. 14, 2023 – ONEOK, Inc. (NYSE: OKE) will participate in the BofA Securities Global Energy Conference on Nov. 15, 2023, in Houston, Texas. ONEOK management will p

News ONEOK to Participate in BofA Securities Global Energy Conference TULSA, Okla.

November 15, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) November 14, 2023 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 001-13643 73-1520922 (State or other jurisdiction (Commission (IRS Employer of incorporati

November 9, 2023 EX-99.1

ONEOK, Inc. Employee Stock Purchase Plan as amended and restated effective May 2

Exhibit 99.1 ONEOK, INC. EMPLOYEE STOCK PURCHASE PLAN Amended and Restated February 22, 2023 (effective May 24, 2023) 1. Purpose The purpose of this Plan is to provide eligible employees the opportunity to purchase Common Stock at a discount on a basis that qualifies for the tax treatment prescribed by Section 423 of the Code. 2. Definitions The following terms, when used in the Plan, shall have t

November 9, 2023 S-8

As filed with the SEC on November 9, 2023

As filed with the SEC on November 9, 2023 Registration No. 333 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ONEOK, Inc. (Exact name of registrant as specified in its charter) Oklahoma 73-1520922 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 100 West Fifth

November 9, 2023 EX-FILING FEES

Filing Fee Table.

Exhibit 107.1 Calculation of Filing Fee Table Form S-8 (Form Type) ONEOK, Inc. (Exact name of registrant as specified in its charter) Table 1 - Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price (3) Fee Rate Amount of Registration Fee Equity Common Stock, par value $0.01

Other Listings
IT:1OKE €63.10
DE:ONK €63.80
MX:OKE
GB:0KCI USD71.86
AT:OKE
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