Item 5(a) of the Schedule 13D is hereby amended and restated in its entirety as follows: As of September 28, 2026, Mr. Kanders may be deemed to beneficially own 8,124,220 shares of Common Stock, constituting approximately 20.2% of the outstanding shares of Common Stock, consisting of (i) 4,444,326 shares held directly; (ii) 1,528,465 shares held by Kanders GMP Holdings, LLC ("Holdings"), of which he is a majority member and a trustee of the manager; (iii) options to purchase 1,905,997 shares exercisable or exercisable within 60 days of September 28, 2026; (iv) 1,935 shares held as UTMA custodian; (v) 125,221 shares held by his spouse in a UTA Trust Account of which he is sole trustee; (vi) 17,832 shares held as joint tenants with rights of survivorship; and (vii) 100,444 shares beneficially owned by his spouse. The amount reported above as being beneficially owned by Mr. Kanders excludes (i) a restricted stock award of 500,000 shares of Common Stock granted to him on March 4, 2022 under the Company's 2015 Stock Incentive Plan, all of which will vest if, on or before March 4, 2032, the Fair Market Value (as defined in that plan) of the Common Stock equals or exceeds $50.00 per share for 20 consecutive trading days; and (ii) a restricted stock award of 500,000 shares of Common Stock granted to him on March 14, 2023 under that plan, of which (A) 250,000 shares will vest if, on or before March 14, 2033, the Fair Market Value of the Common Stock equals or exceeds $15.00 per share for 20 consecutive trading days and (B) 250,000 shares will vest if, on or before March 14, 2033, the Fair Market Value of the Common Stock equals or exceeds $18.00 per share for 20 consecutive trading days. Holdings may be deemed to beneficially own 1,528,465 shares of Common Stock, constituting approximately 4.0% of the outstanding shares of Common Stock. These shares are included in, and are not additional to, Mr. Kanders' aggregate shares of Common Stock reported as beneficially owned by him. The percentage of shares of common stock reported as being beneficially owned by Mr. Kanders is based on 38,288,155 shares of Common Stock outstanding as of July 30, 2026, as reported in the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 filed with the Securities and Exchange Commission on August 6, 2026, plus 1,905,997 shares underlying the options included above. Holdings' percentage is based on the 38,288,155 outstanding shares, without adding Mr. Kanders' options. Of the 8,124,220 shares beneficially owned by the Reporting Persons, an aggregate of 1,679,147 shares of Common Stock, comprised of 500,000 shares of Common Stock beneficially owned by Holdings and 1,179,147 shares of Common Stock beneficially owned by Mr. Kanders, serve as collateral in favor of Bank of America, N.A. pursuant to the Pledge Agreements, as amended by the Pledge Amendments, as described in Item 6 of this Amendment No. 18.

Item 5(b) of the Schedule 13D is hereby amended and restated as follows: Mr. Kanders has sole power to vote and dispose of 8,023,776 shares of Common Stock and shares with his spouse the power to vote and dispose of 100,444 shares of Common Stock. Mr. Kanders disclaims beneficial ownership of the shares held by his spouse. Holdings has no sole voting or dispositive power and shares voting and dispositive power with respect to 1,528,465 shares of Common Stock, which are included in the shares reported for Mr. Kanders.

N/A

Item 6 of the Schedule 13D is hereby supplemented as follows: On September 28, 2026, Holdings and Mr. Kanders entered into Amendments to Pledge Agreement with Bank of America, N.A., each dated as of September 25, 2026 (the "Pledge Amendments"), amending their respective Pledge Agreements dated as of December 16, 2021 and March 10, 2010, each as amended (the "Pledge Agreements"). As a result of the Pledge Amendments, Mr. Kanders received previously unavailable margin borrowing capacity on an aggregate of 1,679,147 shares of Common Stock, comprised of 500,000 shares beneficially owned by Holdings and 1,179,147 shares beneficially owned by Mr. Kanders, which serve as collateral for a Loan Agreement previously entered into between Warren B. Kanders and Bank of America, N.A. The pledge arrangements are described in the Pledge Agreements, as amended by the Pledge Amendments. The foregoing description does not purport to be complete and is qualified in its entirety by reference to the full text of the Pledge Agreements and the Pledge Amendments, copies of which are filed as Exhibits 99.1 through 99.4 to this Amendment No. 18 and incorporated herein by reference.

Item 7 of the Schedule 13D is hereby supplemented as follows: Exhibit 99.1 - Pledge Agreement, dated as of December 16, 2021, from Kanders GMP Holdings, LLC in favor of Bank of America, N.A. Exhibit 99.2 - Amendment to Pledge Agreement, dated as of September 25, 2026, from Kanders GMP Holdings, LLC in favor of Bank of America, N.A. Exhibit 99.3 - Pledge Agreement, dated as of March 10, 2010, from Warren B. Kanders in favor of Bank of America, N.A. Exhibit 99.4 - Amendment to Pledge Agreement, dated as of September 25, 2026, from Warren B. Kanders in favor of Bank of America, N.A.