X0202 SCHEDULE 13G/A 0002079524 XXXXXXXX LIVE 2 Common Stock, par value $0.0001 06/30/2026 0001860160 Firefly Aerospace Inc. 31816X106 2203 SCOTTSDALE DRIVE LEANDER TX 786416332 Rule 13d-1(d) Markusic Thomas E X1 8581146.00 235374.00 8581146.00 235374.00 8816520.00 5.2 IN In respect of shares with sole beneficially ownership, represents 4,807,819 shares of Common Stock and 4,008,701 shares of Common Stock issuable upon exercise of options to purchase Common Stock. In respect shares with shared beneficial ownership, represents 235,374 shares of Common Stock owned by the spouse of the Reporting Person. Percentage ownership is calculated based on 167,404,645 shares of Common Shares outstanding as of August 6, 2026, as reported on the Issuer's Form 10-Q filed with the SEC on August 11, 2026, as increased by 4,008,701 shares of Common Stock issuable upon exercise of options to purchase Common Stock. Firefly Aerospace Inc. 2203 SCOTTSDALE DRIVE, LEANDER, TEXAS, 786416332. Thomas Markusic 1320 Arrow Point Drive, Suite 109, Cedar Park, TX 78613 United States Y 8,816,520 5.2%, which is calculated based on 167,404,645 shares of Common Shares outstanding as of August 6, 2026, as reported on the Issuer's Form 10-Q filed with the SEC on August 11, 2026, as increased by 4,008,701 shares of Common Stock issuable upon exercise of options to purchase Common Stock. 8,581,146, which represents 4,807,819 shares of Common Stock and 4,008,701 shares of Common Stock issuable upon exercise of options to purchase Common Stock 235,374, which represents shares of Common Stock owned by the spouse of the Reporting Person 8,581,146, which represents 4,807,819 shares of Common Stock and 4,008,701 shares of Common Stock issuable upon exercise of options to purchase Common Stock 235,374, which represents shares of Common Stock owned by the spouse of the Reporting Person Y Y Y Y Y Y Markusic Thomas E /s/ Thomas Markusic 08/14/2026