Firefly Aerospace Inc. Chief Executive Officer Jesung Kim filed a Form 4 on September 23, 2026, reporting the exercise of employee stock options and acquisition of common stock on September 22, 2026.

Key Highlights

  • Reporting person: Jesung Kim, Director and Chief Executive Officer of Firefly Aerospace Inc.
  • Transaction date: September 22, 2026, involving 43,278 shares of Common Stock acquired via option exercise (transaction code M).
  • Exercise price: $2.3106 per share, with the derivative security price listed as $0.
  • Post-transaction ownership: Kim directly holds 898,738 shares of Common Stock following the transaction.
  • Remaining options: 588,462 employee stock options (right to buy) remain beneficially owned directly, with an expiration date of May 5, 2035.
  • Vesting status: According to the filing, "All of the shares subject to the option are fully vested and exercisable as of the date hereof."

Firefly Aerospace CEO Kim Reports Option Exercise and Resulting Share Position

According to the Form 4 filed with the U.S. Securities and Exchange Commission on September 23, 2026, Jesung Kim, who serves as both Director and Chief Executive Officer of Firefly Aerospace Inc. (NASDAQ:FLY), reported a transaction in the company's Common Stock on September 22, 2026. The filing was signed by Nathan O'Konek as attorney-in-fact on behalf of the reporting person.

The filing discloses that Kim acquired 43,278 shares of Common Stock through the exercise of an employee stock option, identified by transaction code M. The conversion or exercise price of the derivative security was listed as $2.3106. The filing notes that the price of the derivative security itself was $0. Following this transaction, Kim's direct beneficial ownership of Common Stock stood at 898,738 shares, according to the filing.

In Table II, the filing reports that the same employee stock option, covering 43,278 underlying shares of Common Stock with an expiration date of May 5, 2035, was disposed of through the exercise. After the transaction, Kim retains direct beneficial ownership of 588,462 employee stock options. The filing's explanation of responses states that "All of the shares subject to the option are fully vested and exercisable as of the date hereof." The filing indicates this was made by one reporting person and is not an amendment to a prior filing.

What Was Disclosed

The Form 4 discloses that Firefly Aerospace CEO Jesung Kim exercised 43,278 fully vested employee stock options on September 22, 2026, at $2.3106 per share, resulting in direct ownership of 898,738 shares of Common Stock and 588,462 remaining options expiring May 5, 2035.