Note 9 – Stock-Based Compensation

There have been no changes to the Solid Power, Inc. 2014 Equity Incentive Plan (the “2014 Plan”), the Solid Power, Inc. 2021 Equity Incentive Plan (the “2021 Plan”), the Solid Power, Inc. 2021 Employee Stock Purchase Plan (“ESPP”), the Company’s accounting for stock-based compensation under those plans, or the restricted stock grants to two Dahae executives, as disclosed in the 2024 Form 10-K.

The fair value of stock options and RSUs under the 2021 Plan is recognized as compensation expense over the vesting period of the award. The Company accounts for forfeitures as they occur.

For the three and six months ended June 30, 2025 and 2024, the Company recognized compensation costs totaling:

​

​

Unrecognized future compensation costs as of June 30, 2025 were $22,215. The Company expects to recognize the future compensation cost over a weighted-average period of 2.9 years, amortized over a straight-line basis.

The following table summarizes the Company’s award activity for RSUs and stock options for the three and six months ended June 30, 2025:

​

​

Stock Options

For the six months ended June 30, 2025, no stock options were granted. The fair value of each stock option grant during the six months ended June 30, 2024 was estimated on the grant date using the Black-Scholes option pricing model with the following weighted-average assumptions used:

​

​

Restricted Stock Grants to Dahae Executives

​

On October 21, 2024, the Company issued 238,806 shares of restricted stock to two executive employees of Dahae pursuant to the provisions of Regulation S under the Securities Act of 1933, as amended. This issuance was not under any existing plan. The restricted stock vests over a four-year period, subject to forfeiture upon the applicable stockholder ceasing to provide services to Dahae or upon Dahae’s default on the financing instruments entered into between the Company and Dahae on October 21, 2024. During the six months ended June 30, 2025, 63,966 shares vested. Stock-based compensation expense is recognized within Share of net loss of equity method investee in the Condensed Consolidated Statements of Operations and Comprehensive Loss. No additional shares of restricted stock are authorized for issuance to Dahae executives.