Material Event (Form 8-K)

On May 12, 2025, Ally Financial Inc. ("Ally") entered into an Underwriting Agreement incorporating Ally's Underwriting Agreement Standard Provisions (Debt Securities) (together, the "Underwriting Agreement") with Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC and RBC Capital Markets, LLC, as representatives of the several Underwriters named therein (the "Underwriters"), pursuant to which Ally agreed to sell to the Underwriters $750,000,000 aggregate principal amount of 5.737% Fixed-to-FloatingRate Senior Notes due 2029 (the "Notes", and such offer and sale of the Notes, the "Offering"). The Notes were registered pursuant to Ally's shelf registration statement on Form S-3(File No. 333-268013)(the "Registration Statement"), which became automatically effective on October 26, 2022.

The Underwriting Agreement contains customary representations, warranties and covenants of Ally, conditions to closing, indemnification obligations of Ally and the Underwriters, and termination and other customary provisions.

The foregoing description of the Underwriting Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the document which is attached as Exhibit No. 1.1 to this Current Report on Form 8-Kand incorporated by reference herein.

The Notes were issued on May 15, 2025 pursuant to an Indenture dated as of July 1, 1982, as supplemented and amended by the first supplemental indenture dated as of April 1, 1986, the second supplemental indenture dated as of June 15, 1987, the third supplemental indenture dated as of September 30, 1996, the fourth supplemental indenture dated as of January 1, 1998, the fifth supplemental indenture dated as of September 30, 1998 and the sixth supplemental indenture dated as of June 9, 2022 (the "Indenture") between Ally and The Bank of New York Mellon (successor to Morgan Guaranty Trust Company of New York), as trustee, and an action of the executive committee of Ally dated as of May 12, 2025 (the "Executive Committee Action"). In connection with the Offering, Ally is filing the Underwriting Agreement, the Executive Committee Action, the form of Note, a legal opinion and a consent as, respectively, Exhibit No. 1.1, Exhibit No. 4.1, Exhibit No. 4.2, Exhibit No. 5.1 and Exhibit No. 23.1 to this Form 8-K,each of which is incorporated by reference in its entirety into the Registration Statement. The Indenture is filed as an exhibit to the Registration Statement.