7. Stockholders’ Equity
At-The-Market Sales Facility
In March 2022, the Company filed a shelf registration statement with the SEC, which was declared effective on April 22, 2022. On April 28, 2022, the Company terminated an at-the-market sales agreement previously entered into with Cowen and Company, LLC (Cowen) in 2020 and entered into a new at-the-market sales agreement (the 2022 Sales Agreement) with Cowen. Under the 2022 Sales Agreement, the Company may sell up to $100.0 million worth of shares of common stock. During the year ended December 31, 2022, the Company issued and sold 1,953,854 shares of common stock under the 2022 Sales Agreement at a weighted average price per share of $2.22, for aggregate net proceeds of $4.2 million, after deducting commissions and offering expenses.
During the quarter ended March 31, 2023, the Company issued and sold 9,822,930 shares of common stock under the 2022 Sales Agreement at a weighted average price per share of $3.01, for aggregate net proceeds of $28.7 million, after deducting commissions and offering expenses. There were no sales during the quarter ended June 30, 2023. As of June 30, 2023, approximately $66.0 million remained available to be sold under the terms of the 2022 Sales Agreement.
2013 Equity Incentive Plan
The Company’s board of directors adopted, and its stockholders approved, its 2013 Equity Incentive Plan (the 2013 Plan) effective on January 9, 2014. In April 2022, the Company’s board of directors approved an amendment and restatement of the 2013 Plan, which was approved by the Company’s stockholders at the Company’s annual meeting of stockholders held in May 2022 (as so amended, the Amended 2013 Plan).
The Amended 2013 Plan provides for the grant of incentive stock options within the meaning of Section 422 of the Internal Revenue Code to the Company’s employees and its parent and subsidiary corporations’ employees, and for the grant of nonstatutory stock options, restricted stock awards, RSU awards, stock appreciation rights, performance stock awards and other forms of stock compensation to its employees, including officers, consultants and directors. The Amended 2013 Plan also provides for the grant of performance cash awards to the Company’s employees, consultants and directors. Unless otherwise stated in a stock option agreement, 25% of the shares subject to an option grant will typically vest upon the first anniversary of the vesting start date, with the balance of the shares vesting in a series of thirty-six successive equal monthly installments as of the first day of each month measured from the first anniversary of the vesting start date. Upon termination of employment by reasons other than death, cause, or disability, any vested options will terminate 90 days after the termination date, unless otherwise set forth in a stock option agreement. Stock options generally terminate 10 years from the date of grant.
Authorized Shares
The maximum number of shares of common stock that initially could be issued under the 2013 Plan was 1,000,000 shares, plus any shares subject to stock options or similar awards granted under the Company’s prior 2003 Equity Incentive Plan that expired or terminated without having been exercised in full or were forfeited or repurchased by the Company. The number of shares of common stock reserved for issuance under the 2013 Plan automatically increased on January 1 of each year, through January 1, 2022, by 3% of the total number of shares of common stock outstanding on December 31 of the preceding calendar year.
Following the approval of the Amended 2013 Plan by the Company’s stockholders, the share reserve under the Amended 2013 Plan was increased by 2,619,622 shares, and beginning on January 1, 2023 and ending on (and including) January 1, 2029, the maximum number of shares of common stock that may be issued under the Amended 2013 Plan will cumulatively be increased by 4% of the number of shares of common stock issued and outstanding on the immediately preceding December 31, or such lesser number of shares as determined by the board of directors or the compensation committee thereof. The maximum number of shares that may be issued pursuant to exercise of incentive stock options under the Amended 2013 Plan is 20,000,000 shares. As of June 30, 2023, the total number of shares