COF: Financial results

Item 2.02 Results of Operations and Financial Condition. On October 20, 2026, Capital One Financial Corporation (the “Company”) issued a press release announcing its financial results for the third quarter ended September 30, 2026. Copies of the Company’s press release and financial supplement are attached and furnished herewith as Exhibits 99.1 and 99.2 to this Form 8-K and are incorporated herein by reference. Note: Information in this report (including Exhibits 99.1 and 99.2) furnished pursuant to Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section. 1 Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description 99.1 Press Release, dated October 20 , 2026 - Third Quarter 2026 99.2 Financial Supplement - Third Quarter 2026 104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL Earnings Conference Call Webcast Information. The Company will hold an earnings conference call on October 20, 2026 at 5:00 PM Eastern Time. The conference call will be accessible through live webcast. Interested investors and other individuals can access the webcast via the Company’s home page (www.capitalone.com). Under “About,” choose “Investors” to access the Investor Center and view and/or download the earnings press release, the financial supplement, including a reconciliation of non-GAAP financial measures, and the earnings release presentation. A replay of the webcast will be archived on the Company’s website through November 03, 2026 at 5:00 PM Eastern Time. 2 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