Serhii Kupriienko, a director and 10% owner of Swarmer, Inc (NASDAQ:SWMR), filed a Form 4 on September 23, 2026, disclosing two transactions in the company's common stock dated August 19, 2026 and September 21, 2026.

Key Highlights

  • RSU Forfeiture: 1,202,065 shares of common stock were disposed of at $0 on August 19, 2026, following the forfeiture of unvested restricted stock units upon termination of employment with a subsidiary of the issuer.
  • Option Exercise: 235,163 shares were acquired on September 21, 2026 via a stock option exercise (transaction code M) at a price of $0.00001 per share.
  • Resulting Ownership: Following both transactions, Kupriienko directly holds 4,372,700 shares of common stock.
  • Derivative Securities: 1,410,975 stock options (right to buy) remain beneficially owned directly, with an expiration date of September 14, 2033.
  • Vesting Schedule: The underlying option vests over four years, with one-fourth vesting on the one-year anniversary of the grant date and one-forty-eighth vesting monthly thereafter, subject to continued service.
  • Late Filing Note: The August 19, 2026 forfeiture transaction was reported late, which the filing attributes to "an inadvertent administrative error and not any error of the Reporting Person."

Kupriienko's Ownership Changes Following Employment Termination at Swarmer Subsidiary

According to the filing, Serhii Kupriienko, identified as both a director and a 10% owner of Swarmer, Inc, reported two separate transactions in Table I covering non-derivative securities. On August 19, 2026, 1,202,065 shares were disposed of at a price of $0. The filing explains that these shares represented restricted stock units that were unvested at the time Kupriienko's employment with a subsidiary of the issuer was terminated, and were therefore forfeited. This transaction was reported after its occurrence, with the filing noting the delay was due to "an inadvertent administrative error and not any error of the Reporting Person."

The second transaction, dated September 21, 2026, involved the acquisition of 235,163 shares of common stock through the exercise of a stock option, coded as an "M" transaction in the filing. The conversion or exercise price of the derivative security is listed as $0.00001. Following this exercise, Kupriienko's direct beneficial ownership of common stock stood at 4,372,700 shares, according to the filing.

In Table II, covering derivative securities, the filing reports that 235,163 stock options were exercised on September 21, 2026, with an expiration date of September 14, 2033. After that exercise, 1,410,975 stock options (right to buy common stock) remain directly beneficially owned by Kupriienko. The filing states that shares underlying the option vest over a four-year period, with one-fourth vesting on the one-year anniversary of the grant date and one-forty-eighth vesting monthly thereafter, subject to the reporting person's continued service through the applicable vesting date. The form was signed by Kostantinos Skordalos as attorney-in-fact for Serhii Kupriienko on September 23, 2026.

What Was Disclosed

The Form 4 discloses a forfeiture of 1,202,065 unvested RSUs following employment termination at a Swarmer subsidiary, and a subsequent exercise of 235,163 stock options at $0.00001 per share, resulting in direct beneficial ownership of 4,372,700 common shares and 1,410,975 remaining stock options.