Firefly Aerospace CEO granted 52,836 RSUs

Kim Jesung reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Kim Jesung reported acquisition or exercise transactions in this Form 4 filing.

Firefly Aerospace Inc. director and Chief Executive Officer Kim Jesung received an equity grant of 52,836 shares of Common Stock in the form of restricted stock units (RSUs) at no cash purchase price. Following this award, Jesung directly holds 941,725 shares.

The RSUs were granted under the Firefly Aerospace Inc. 2025 Omnibus Incentive Plan as compensation. One-third of the RSUs vest on the first anniversary of the grant date, and 1/12 of the RSUs vest quarterly thereafter so that all units are fully vested on the third anniversary, provided Jesung remains employed through each vesting date.

Insider Trade Summary

Grant/Award: 52,836 shares

Grant/Award 1 txn

Insider Kim Jesung

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	52,836	$0.00	$0.00

Holdings After Transaction: Common Stock — 941,725 shares (Direct)

Footnotes (1)

1. F1. Represents restricted stock units ("RSUs") granted under the Firefly Aerospace Inc. 2025 Omnibus Incentive Plan. One-third of the RSUs vest at the one-year anniversary of the grant date, and 1/12 of the RSUs vest quarterly thereafter (such that the RSUs will be fully vested at the third anniversary of the grant date), subject in each case to the reporting person's continued employment with the Issuer through the respective vesting date.

FAQ

What did Firefly Aerospace (FLY) CEO Kim Jesung report on this Form 4?

Kim Jesung reported receiving 52,836 restricted stock units of Firefly Aerospace Common Stock as a compensation grant. The award was made at no cash purchase price and increases his direct ownership stake in the company to 941,725 shares after the transaction.

How many Firefly Aerospace shares does Kim Jesung hold after this RSU grant?

After the grant, Kim Jesung directly holds 941,725 shares of Firefly Aerospace Common Stock. This figure includes the newly awarded 52,836 restricted stock units, which will convert into shares as they vest over time under the company’s 2025 Omnibus Incentive Plan.

What is the vesting schedule for Kim Jesung’s 52,836 Firefly Aerospace RSUs?

One-third of the 52,836 RSUs vest on the one-year anniversary of the grant date. The remaining two-thirds vest in equal 1/12 installments each quarter, with all units fully vested on the third anniversary, subject to continued employment through each vesting date.

Was Kim Jesung’s Firefly Aerospace RSU award an open-market purchase or a compensation grant?

The RSU award was a compensation grant, not an open-market purchase. The 52,836 restricted stock units were granted at a price of $0.00 per share under the Firefly Aerospace Inc. 2025 Omnibus Incentive Plan as part of Kim Jesung’s executive equity compensation.

Does Kim Jesung’s RSU grant under the Firefly Aerospace 2025 Omnibus Incentive Plan require continued employment?

Yes. Each portion of the RSU award vests only if Kim Jesung remains employed with Firefly Aerospace through the applicable vesting date. If employment ends before specific vesting dates, unvested RSUs scheduled for those dates would not become earned according to the disclosed terms.

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Accepted by SEC EDGAR 03/20/2026 - 05:44 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Kim Jesung

(Last) (First) (Middle)

C/O FIREFLY AEROSPACE INC.

1320 ARROW POINT DRIVE #109

(Street)

CEDAR PARK TEXAS 78613

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Firefly Aerospace Inc. [ FLY ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	03/19/2026		A		52,836(1)	A	$0	941,725	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Represents restricted stock units ("RSUs") granted under the Firefly Aerospace Inc. 2025 Omnibus Incentive Plan. One-third of the RSUs vest at the one-year anniversary of the grant date, and 1/12 of the RSUs vest quarterly thereafter (such that the RSUs will be fully vested at the third anniversary of the grant date), subject in each case to the reporting person's continued employment with the Issuer through the respective vesting date.

	/s/ David Wheeler, Attorney-in-fact	03/20/2026
	** Signature of Reporting Person	Date
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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)