15. Common Stock

As of March 31, 2022 and December 31, 2021, the Company had reserved 74,863,862 and 76,008,377 shares, respectively, of common stock for the conversion of the outstanding Preferred Stock, exercise of outstanding stock options, granting of awards under the Company’s 2021 Equity Incentive Plan and 2013 Equity Incentive Plan (see Note 16) and the exercise of outstanding warrants (see Note 13).