Form 4 Filing for Firefly Aerospace Inc.

This filing reports a transaction by Wu Remington, Chief Accounting Officer of Firefly Aerospace Inc. On September 16, 2026, 1827 shares of common stock were disposed of with a price per share of $20.28. This transaction was made to cover tax withholding obligations upon the vesting of restricted stock units. Following this transaction, Wu Remington holds 38596 shares. The filing also includes a Power of Attorney document, designating Emily Coskey, Darren Ma, and Nathan O’Konek as attorneys-in-fact for Section 13 and 16 reporting obligations.