ONEOK INC NEW

During the three months ended March 31, 2025, no director or officer of the Company adopted orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangements,” as each term is defined in item 408(a) Regulation S-K.

Disclosure Pursuant to Item 5.03 of Form 8-K – Amendments to Articles of Incorporation or Bylaws - In connection with our repurchase on April 25, 2025 of all our outstanding Series E Preferred Stock from ONEOK Foundation, Inc., a not-for-profit corporation formed for the purpose of making charitable contributions, on April 28, 2025, we filed a certificate of retirement which (i) retired and canceled all such outstanding shares of Series E Preferred Stock and (ii) amended our certificate of incorporation to eliminate all references to the Series E Preferred Stock. The retired shares have now resumed the status of authorized but unissued shares of our preferred stock, such that the total number of authorized shares of our preferred stock is 100,000,000 of undesignated preferred stock. No shareholder vote was required to approve the certificate of retirement. Our amended and restated certificate of incorporation is filed as Exhibit 3.1 to this Quarterly Report.