Andretti Acquisition Corp. II — Form 8-K

Andretti Acquisition Corp. II (ACII) entered into Non-Redemption Agreements with investors dated August 28, 2026. Under the agreement, ACII seeks shareholder approval to extend its business combination deadline from September 9, 2026 to September 9, 2027. Investors who hold up to 9.9% of public shares outstanding and do not redeem will receive 'Promised Securities' (shares in the post-combination public company, 'Pubco') on a schedule based on whether the business combination closes before or after June 9, 2027. No specific dollar amounts or share counts are disclosed in the filing template; Exhibit A contains blanks for investor identity, share counts, and promised securities amounts. The agreement imposes transfer restrictions and requires investors to join a Registration Rights Agreement.