Form 4 Filing for Mathew Jeffrey

This SEC filing details transactions made by Mathew Jeffrey, SVP, Chief Information Officer at Frontier Group Holdings, Inc. (ULCC). On September 22, 2026, Jeffrey was granted 65,445 Restricted Stock Units (RSUs) which converted to 65,445 shares of Common Stock upon vesting. No shares were sold in this transaction, as indicated by footnote F1. The RSUs have no expiration date and the remaining RSUs vest annually starting September 22, 2027. Additionally, 18,818 shares of Common Stock were withheld by the issuer to cover tax obligations related to the net issuance of shares from the vesting of RSUs. These withheld shares do not represent a sale by Jeffrey. Following these transactions, Jeffrey holds 46,627 shares of Common Stock directly.