Firefly Aerospace Inc.

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-16 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Firefly Aerospace Inc. (FLY) CIK: 0001860160 --- Reporting Owner --- Name: Ferring Russell Shea CIK: 0002079163 Role: Officer (Chief Technology Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-16 | Code: F (Payment of exercise/tax) Shares: -16,700 | Price: $20.28 Total Value: $338,676.00 Shares Owned After: 525,424 | Ownership: D (Direct) Footnotes: [F1] Represents shares of common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the vesting of restricted stock units. --- Footnotes (Complete Index) --- F1: Represents shares of common stock withheld by the Issuer to cover the reporting person's tax withholding obligation upon the vesting of restricted stock units. --- Signature --- /s/ /s/ Nathan O'Konek, Attorney-in-fact (2026-09-18)