Firefly Aerospace Inc.

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-04 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Firefly Aerospace Inc. (FLY) CIK: 0001860160 --- Reporting Owner --- Name: Emerson Christopher Plummer IV CIK: 0002079081 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-06-04 | Code: A (Grant or award) Shares: +3,630 | Price: $0.00 Shares Owned After: 6,964 | Ownership: D (Direct) Footnotes: [F1] Represents restricted stock units ("RSUs") granted under the Firefly Aerospace Inc. 2025 Omnibus Incentive Plan. The RSUs vest on June 4, 2027, subject to the reporting person's continued service to the Issuer through the vesting date. [F2] A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's common stock. --- Footnotes (Complete Index) --- F1: Represents restricted stock units ("RSUs") granted under the Firefly Aerospace Inc. 2025 Omnibus Incentive Plan. The RSUs vest on June 4, 2027, subject to the reporting person's continued service to the Issuer through the vesting date. F2: A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's common stock. --- Signature --- /s/ /s/ David Wheeler, Attorney-in-fact (2026-06-08)