COF: Company disclosure

Item 7.01 Regulation FD Disclosure. Capital One Financial Corporation (the “Company”) will present at the Barclays 24th Annual Global Financial Services Conference in New York, New York on Wednesday, September 16, 2026, at 12:00 p.m. ET. A live audio webcast will be available via the Company’s website (http://www.capitalone.com). Choose “Investors” to access the Investor Center and listen to the presentation. The replay of the presentation will be archived on the Company’s website through at least September 30, 2026. Note : Information in this report furnished pursuant to Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly stated by specific reference in such filing. This report will not be deemed an admission as to the materiality of any information in the report that is required to be disclosed solely by Regulation FD. Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL 1 SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Company has duly caused this Current Report on Form 8-K to be signed on its behalf by the undersigned hereunto duly authorized. CAPITAL ONE FINANCIAL CORPORATION Date: September 15, 2026 By: /s/ Matthew W. Cooper Matthew W. Cooper General Counsel and Corporate Secretary 2