Jesung Kim - 16 Sep 2026 Form 4 Insider Report for Firefly Aerospace Inc. (FLY)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: FLY
Reported as of: 16 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Sep 2026, 20:58:33 UTC
Prior SEC filing: 20 Mar 2026
Next SEC filing: 23 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ Nathan O'Konek, Attorney-in-fact

Key filing fact

Jesung Kim filed Form 4 for Firefly Aerospace Inc. (FLY) on 18 Sep 2026.

Key facts

This page summarizes Jesung Kim's Form 4 filing for Firefly Aerospace Inc. (FLY).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 18 Sep 2026, 20:58.

Change

Previous filing in this sequence was filed on 20 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002078068 Primary reporting owner

Kim Jesung

Relationship: Chief Executive Officer, Director
Address: C/O FIREFLY AEROSPACE INC., 2203 SCOTTSDALE DRIVE, LEANDER
Signature: /s/ Nathan O'Konek, Attorney-in-fact
Signature date: 18 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

FLY transaction

Common Stock

Tax liability

Transaction value
Shares: -86,265
Change %: -9.2%
Price: $20.28^*
Shares after: 855,460
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote 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.

SEC remarks

Exhibit 24.1 - Power of Attorney