Firefly Aerospace Inc.

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-22 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Firefly Aerospace Inc. (FLY) CIK: 0001860160 --- Reporting Owner --- Name: Kim Jesung CIK: 0002078068 Role: Director, Officer (Chief Executive Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-22 | Code: M (Exercise of derivative) Shares: +43,278 | Price: $2.31 Total Value: $99,998.15 Shares Owned After: 898,738 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Employee Stock Option (right to buy) Date: 2026-09-22 | Code: M (Exercise of derivative) Shares: -43,278 | Price: $0.00 Exercise Price: $2.31 Exercisable: N/A | Expires: 2035-05-05 Shares Owned After: 588,462 | Ownership: D (Direct) Footnotes: [F1] All of the shares subject to the option are fully vested and exercisable as of the date hereof. --- Footnotes (Complete Index) --- F1: All of the shares subject to the option are fully vested and exercisable as of the date hereof. --- Signature --- /s/ /s/ Nathan O'Konek, Attorney-in-fact (2026-09-23)