Company Update

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, 2026     NATIONAL FUEL GAS COMPANY (Exact name of registrant as specified in its charter)       New Jersey   1-3880   13-1086010 (State or other jurisdiction of incorporation)   (Commission File Number)   (IRS Employer Identification No.)   6363 Main Street   Williamsville , New York   14221 (Address of Principal Executive Offices)   (Zip Code) Registrant’s telephone number, including area code: (716) 857-7000 Former name or former address, if changed since last report: Not Applicable     Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions ( see General Instruction A.2. below):   ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)   ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)   ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))   ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:   Title of each class   Trading Symbol   Name of Each Exchange on Which Registered Common Stock, par value $1.00 per share   NFG   New York Stock Exchange Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company  ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐       Item 8.01 Other Events. On May 27, 2026, National Fuel Gas Company (the “Company”) elected to exercise its optional redemption rights to redeem, subject to certain conditions, the entire outstanding $300,000,000 aggregate principal amount of the Company’s 5.50% Notes due October 2026 (the “Notes”), and The Bank of New York Mellon, as trustee under the indenture governing the Notes, issued a conditional redemption notice to registered holders of the Notes. The date fixed for the redemption of the Notes is June 11, 2026. The Notes will be redeemed at the redemption price calculated in accordance with the terms and conditions set forth in the indenture governing and the officer’s certificate establishing the terms of the Notes. The foregoing does not constitute a notice of redemption with respect to any of the Notes. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.   NATIONAL FUEL GAS COMPANY By:   /s/ Lee E. Hartz   Lee E. Hartz   General Counsel and Secretary Dated: May 27, 2026