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Stock-Based Compensation | 3 Months Ended | 9 Months Ended
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Dec. 31, 2024 | Sep. 30, 2025
Stock-Based Compensation [Abstract] |  |
STOCK-BASED COMPENSATION | NOTE 11 – STOCK-BASED COMPENSATION Old Nukk Equity Incentive Plan For periods prior to the reverse recapitalization (see Note 4), the Old Nukk Equity Incentive Plan (the “Old Nukk Plan”) permitted the granting of various awards including stock options (including both nonqualified options and incentive options), stock appreciate rights (“SARs”), stock awards, phantom stock units, performance awards and other share-based awards to employees, outside directors and consultants, and advisors to the Company. Only stock options have been awarded to consultants and advisors under the Old Nukk Plan. Assumed Options converted into an option to purchase a number of shares of the Company’s common stock equal to the product of the number of shares of Old Nukk common stock and the Exchange Ratio at an exercise price per share equal to the exercise price of the Assumed Options divided by the Exchange Ratio. Each Assumed Option is governed by the same terms and conditions applicable to the Assumed Options prior to the Business Combination. No further grants can be made under the Old Nukk Plan. Stock options generally vest over one to three years, with a maximum term of ten years from the date of grant. These awards become available to the recipient upon the satisfaction a vesting condition based on a period of service. Activity in the Old Nukk Plan for the three months ended December 31, 2024 and the years ended September 30, 2024 and 2023 is summarized as follows:
|  | Number of Options |  |  | Weighted Average Exercise Price |
Outstanding at September 30, 2022 |  |  | 20,896 |  |  | $ | 187.87 |
Expired |  |  | (5,358 | ) |  |  | (186.67 | )
Outstanding at September 30, 2023 and 2024 |  |  | 15,538 |  |  |  | 188.28 |
Forfeited |  |  | (10,715 | ) |  |  | (25.2 | )
Outstanding at December 31, 2024 |  |  | 4,823 |  |  |  | (550.60 | )
Options exercisable at December 31, 2024 |  |  | 4,823 |  |  | $ | 550.60 |
Options expected to vest |  |  | — |  |  | $ | — |
The aggregate intrinsic value of both stock options outstanding and stock options exercisable at December 31, 2024 and September 30, 2024 was $0. The exercise price of all outstanding options was greater than the market price on December 31, 2024 and September 30, 2024, and therefore excluded from the intrinsic value computation. Share-based compensation expense under the Old Nukk Plan for three months ended December 31, 2024 and the years ended September 30, 2024 and 2023 was $5,603, $229,605 and $370,878, respectively, which was recorded as professional fees on the accompanying consolidated statements of operations and comprehensive loss. There was no unrecognized share-based compensation at December 31, 2024. 2023 Equity Incentive Plan On December 22, 2023, the Company’s shareholders approved a new long-term incentive award plan (the “2023 Plan”) in connection with the Business Combination. The 2023 Plan is administered by the Board. The selection of participants, allotment of shares, determination of price and other conditions are approved by the Board at its sole discretion to attract and retain personnel instrumental to the success of the Company. Under the 2023 Plan, the Company may grant an aggregate of 125,000 shares of common stock in the form of stock options (incentive or nonqualified), SARs, stock awards, restricted stock, stock units, and other stock or cash based awards. On December 16, 2024, the Company issued an aggregate of 1,337,500 stock grants with a fair value of $1,859,125 as determined on the issuance date using the reported closing share prices consisting of restricted shares of common stock under its stock incentive plans to various executive officers, directors and consultants of the Company who have provided services to the Company for an extended period of time with limited compensation. | NOTE 10 – STOCK-BASED COMPENSATION Old Nukk Equity Incentive Plan For periods prior to the reverse recapitalization, the Old Nukk Equity Incentive Plan (the “Old Nukk Plan”) permitted the granting of various awards including stock options (including both nonqualified options and incentive options), stock appreciate rights (“SARs”), stock awards, phantom stock units, performance awards and other share-based awards to employees, outside directors and consultants, and advisors to the Company. Only stock options have been awarded to consultants and advisors under the Old Nukk Plan. Assumed Options converted into an option to purchase a number of shares of the Company’s common stock equal to the product of the number of shares of Old Nukk common stock and the Exchange Ratio at an exercise price per share equal to the exercise price of the Assumed Options divided by the Exchange Ratio. Each Assumed Option is governed by the same terms and conditions applicable to the Assumed Options prior to the Business Combination. No further grants can be made under the Old Nukk Plan. 2024 Equity Incentive Plan On October 11, 2024, the Company’s shareholders approved a new long-term incentive award plan (the “2024 Plan”). The 2024 Plan is administered by the Board. The selection of participants, allotment of shares, determination of price and other conditions are approved by the Board at its sole discretion to attract and retain personnel instrumental to the success of the Company. On November 13, 2024, the Company issued 100,000 stock options to a consultant of the Company at an exercise price of $2.39 per share. In May 2025, the consultant exercised these options via a cashless exercise, resulting in an issuance of 84,276 shares of common stock. 2025 Equity Incentive Plan In February 2025, the Company established the Nukkleus Inc 2025 Equity Incentive Plan (the “2025 Plan”) to attract, retain and motivate employees, officers, directors, consultants, agents, advisors and independent contractors of the Company by providing them the opportunity to acquire a proprietary interest in the Company and to align their interest and efforts to the long-term interest of the Company’s stockholders. The 2025 Plan will be administered by the Board of Directors and has 3,950,000 shares of the Company’s common stock reserved for issuance. The 2025 Plan is subject to shareholder approval at a meeting scheduled to occur during the fourth quarter of calendar year 2025. Stock options generally vest over one to three years, with a maximum term of ten years from the date of grant. These awards become available to the recipient upon the satisfaction a vesting condition based on a period of service. Total stock options activity for the nine months ended September 30, 2025 is summarized as follows:
|  | Number of Options |  |  | Weighted Average Exercise Price |
Outstanding at December 31, 2024 |  |  | 104,823 |  |  | $ | 27.61 |
Exercised |  |  | (100,000 | ) |  |  | - |
Outstanding at September 30, 2025 |  |  | 4,823 |  |  |  | 550.60 |
Options exercisable at September 30, 2025 |  |  | 4,823 |  |  | $ | 550.60 |
Options expected to vest |  |  | — |  |  | $ | — |
Share-based compensation expense for three and nine months ended September 30, 2025 was $0 and $177,905, respectively. Share-based compensation expense for the three and nine months ended September 30, 2024 was $5,602 and $154,937, respectively, which was recorded as professional fees on the accompanying consolidated statements of operations and comprehensive loss. There was no unrecognized share-based compensation at September 30, 2025.

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