Stock Based Compensation

3 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement [Abstract]

Stock Based Compensation

12. Stock Based Compensation

The Company currently issues awards under the Soluna Holdings, Inc. Third Amended and Restated 2021 Stock Incentive Plan, as amended (the “2021 Plan”), and the Soluna Holdings, Inc. Amended and Restated 2023 Stock Incentive Plan, as amended (the “2023 Plan”). There were no amendments to the 2021 Plan or the 2023 Plan during the three months ended March 31, 2026. For further details regarding our stock-based compensation plans and the methods and assumptions used in the determination of the fair value of stock-based awards, refer to our Annual Report on Form 10-K filed with the SEC on March 30, 2026.

During the three months ended March 31, 2026, the Company did not grant any awards under the 2021 Plan.

During the three months ended March 31, 2026, the Company awarded the following under the 2023 Plan:

Award Type	Number of Awards	Fair Value/Closing Market Price at Grant
Restricted Stock Awards – Common Stock	1,373,000	$	1.17
Restricted Stock Units – Common Stock	50,000	$	1.17
Restricted Stock Units – Common Stock	485,000	$	0.87
Restricted Stock Units – Common Stock	1,281,250	$	0.75
Restricted Stock Units – Common Stock	140,000	$	0.71
	3,329,250

1,373,000 of the restricted stock awards vest 33% on December 1, 2026, 33% on December 1, 2027, and 34% on December 1, 2028. 50,000 of the restricted stock units vest 25% on April 1, 2026 and the remaining 75% in equal quarterly installments over the next 24 months with the first quarterly vesting on June 20, 2026. 485,000 of the restricted stock units vest 33% on January 1, 2027, 33% on January 1, 2028, and 34% on January 1, 2029. 1,281,250 of the restricted stock units vest 33% on March 9, 2027, 33% on March 9, 2028, and 34% on March 9, 2029. 140,000 of the restricted stock units vest 33% on March 24, 2027, 33% on March 24, 2028, and 34% on March 24, 2029.

During the three months ended March 31, 2025, there were no awards granted under the 2021 Plan and 2023 Plan.