Sec Form 4 Filing - AEROEQUITY GP, LLC @ Firefly Aerospace Inc. - 2025-08-06

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person AEROEQUITY GP, LLC 2. Issuer Name and Ticker or Trading Symbol Firefly Aerospace Inc. [ FLY] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O AE INDUSTRIAL PARTNERS, LP, 6700 BROKEN SOUND PKWY NW 3. Date of Earliest Transaction (MM/DD/YY) 08/06/2025 (Street) BOCA RATON, FL33487 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 08/06/2025 P 11,111 A $ 45 11,111 I See Footnotes ( 1 ) ( 2 ) ( 3 ) Common Stock 4,695,184 I See Footnotes ( 1 ) ( 2 ) ( 4 ) Common Stock 7,924,721 I See Footnotes ( 1 ) ( 2 ) ( 5 ) Common Stock 7,217,573 I See Footnotes ( 1 ) ( 2 ) ( 6 ) Common Stock 38,215,447 I See Footnotes ( 1 ) ( 2 ) ( 7 ) Common Stock 652,502 I See Footnotes ( 1 ) ( 2 ) ( 8 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other AEROEQUITY GP, LLC C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X Glow B Holdings, LLC C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X Glow C Holdings, LLC C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X Glow D Holdings, LLC C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X Glow NS Holdings, LLC C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X AE CO-INVESTMENT PARTNERS FUND III-F, LP C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X AE INDUSTRIAL PARTNERS STRUCTURED SOLUTIONS I, LP C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X GREENE MICHAEL ROBERT C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X ROWE DAVID H. C/O AE INDUSTRIAL PARTNERS, LP 6700 BROKEN SOUND PKWY NW BOCA RATON, FL33487 X Signatures AeroEquity GP, LLC /s/ Michael Greene, Authorized Signatory 08/08/2025 Signature of Reporting Person Date Glow B Holdings, LLC /s/ Kirk Konert, Authorized Signatory 08/08/2025 Signature of Reporting Person Date Glow C Holdings, LLC /s/ Kirk Konert, Authorized Signatory 08/08/2025 Signature of Reporting Person Date Glow D Holdings, LLC /s/ Kirk Konert, Authorized Signatory 08/08/2025 Signature of Reporting Person Date Glow NS Holdings, LLC /s/ Kirk Konert, Authorized Signatory 08/08/2025 Signature of Reporting Person Date AE Co-Investment Partners Fund III-F, LP /s/ Michael Greene, Authorized Signatory 08/08/2025 Signature of Reporting Person Date AE Industrial Partners Structured Solutions I, LP /s/ Michael Greene, Authorized Signatory 08/08/2025 Signature of Reporting Person Date /s/ Michael Greene 08/08/2025 Signature of Reporting Person Date /s/ David H. Rowe 08/08/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Glow NS Holdings, LLC is controlled by Glow NS Intermediate Holdings, LLC, its sole member. Glow B Holdings, LLC and Glow NS Intermediate Holdings LLC are controlled by Glow Aggregator, LLC as each entity's sole member. Glow Aggregator, LLC is controlled by AE Industrial Partners Fund II, L.P. as managing member. AE Industrial Partners Fund II, L.P. is controlled by AE Industrial Partners Fund II GP, LP ("AE Fund II GP"), its general partner. Glow C Holdings, LLC, and Glow D Holdings, LLC are controlled by AE Industrial Partners Fund III, LP as managing member. AE Co-Investment Partners Fund III-F, LP and AE Industrial Partners Fund III, LP are controlled by AE Industrial Partners Fund III GP, LP ("AE Fund III GP"), as each entity's general partner. AE Industrial Partners Structured Solutions I, LP is controlled by AE Industrial Partners Structured Solutions I GP, LP ("AE Solutions GP"), its general partner. ( 2 )(Continued from footnote 1) AE Fund II GP, AE Fund III GP, and AE Solutions GP are each managed by each entity's respective general partner, AeroEquity GP, LLC. AeroEquity GP, LLC is controlled by its managing members, Michael Greene and David Rowe. Messrs. Greene and Rowe make all voting and investment decisions with respect to the securities held by AE Industrial Partners. Each of the entities and individuals named above disclaims beneficial ownership of the securities held by AE Industrial Partners, except to the extent of its pecuniary interest therein. ( 3 )Held by David Rowe. ( 4 )Held by Glow B Holdings, LLC. ( 5 )Held by Glow C Holdings, LLC. ( 6 )Held by Glow D Holdings, LLC. ( 7 )Held by Glow NS Holdings, LLC. ( 8 )Held by AE Co-Investment Partners Fund III-F, LP.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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