KEY: Other company developments

Item 8.01 Other Events. On November 2, 2026, KeyCorp (the “Company”) issued $1,000,000,000 aggregate principal amount of its 5.889% Fixed-to-Floating Rate Senior Medium Term Notes, Series U, due November 2, 2032 (the “Notes”). The Notes were registered under the Securities Act of 1933, as amended, pursuant to a Registration Statement on Form S-3 (File No. 333-296536) filed by the Company with the Securities and Exchange Commission (the “Registration Statement”). In connection with the issuance and sale of the Notes, the legal opinion of Squire Patton Boggs (US) LLP, as counsel, is being filed as Exhibit 5.1 to this Current Report on Form 8-K. Item 9.01. Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description of Exhibit 5.1 Opinion of Squire Patton Boggs (US) LLP as to the validity of the Notes. 104 Cover Page Interactive Data File (embedded within Inline XBRL document). SIGNATURE 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 thereunto duly authorized. KEYCORP Date: November 2, 2026 /s/ Andrea R. McCarthy By: Andrea R. McCarthy Assistant Secretary