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Note 10 - Warrants to Purchase Common Stock | 6 Months Ended
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Jun. 30, 2025
Notes to Financial Statements |
Outstanding Warrants [Text Block] | 10. Warrants to Purchase Common Stock On June 30, 2025, the maturity dates on two accredited investor's Subordinated Notes were extended to December 31, 2025. In connection with the extension, we issued the noteholders warrants exercisable for the purchase of 113 thousand shares of Aemetis, Inc. common stock with a term of two years and an exercise price of $0.01 per share. The warrants were subsequently fully exercised in the third quarter. The following table summarizes warrant activity during the six months ending June 30, 2025:
|  | Warrants Outstanding & Exercisable |  |  | Weighted - Average Exercise Price |  |  | Average Remaining Term in Years |
Outstanding December 31, 2024 |  |  | 530 |  |  | $ | 11.70 |  |  |  | 4.78 |
Granted |  |  | 226 |  |  |  | 0.01 |  |  |  |  |
Exercised |  |  | (113 | ) |  |  | 0.01 |  |  |  |  |
Outstanding June 30, 2025 |  |  | 643 |  |  | $ | 9.64 |  |  |  | 3.88 |
All of the above outstanding warrants are fully vested and exercisable as of June 30, 2025. The fair value calculations for issued warrants are based on the following weighted average factors:
|  | For the six months ended June 30, |
Description |  | 2025 |  |  | 2024 |
Dividend-yield |  |  | - | % |  |  | - | %
Risk-free interest rate |  |  | 3.99 | % |  |  | 4.23 | %
Expected volatility |  |  | 90.48 | % |  |  | 101.36 | %
Expected life (years) |  |  | 2.00 |  |  |  | 2.00 |
Exercise price per share |  | $ | 0.01 |  |  | $ | 0.01 |
Market value per share on grant date |  | $ | 2.59 |  |  | $ | 5.24 |
Fair value per share on grant date |  | $ | 2.58 |  |  | $ | 5.23 |

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