12. Stockholders’ equity

Issuance of Securities through an Underwritten Registered Direct Offering

In December 2023, the Company issued 4.9 million shares of common stock and, in lieu of its common stock to certain investors who so chose, the 2023 Pre-Funded Warrants, pursuant to the 2023 Registration Statement, in an underwritten registered direct offering for gross proceeds of $45.0 million, before deducting underwriting fees and other transaction costs of $3.4 million.

The Company determined that the 2023 Pre-Funded Warrants are freestanding financial instruments because they are both legally detachable and separately exercisable from the common stock sold in the offering. As such, the Company evaluated the 2023 Pre-Funded Warrants to determine whether they represent instruments that require liability classification pursuant to the guidance in ASC 480. However, the Company concluded that the 2023 Pre-Funded Warrants are not a liability within the scope of ASC 480 due to their characteristics. Further, the Company determined that the 2023 Pre-Funded Warrants do not meet the definition of a derivative under ASC 815 because they do not meet the criteria regarding no or little initial net investment. Accordingly, the Company assessed the 2023 Pre-Funded Warrants relative to the guidance in ASC No. 815-40, Contracts in Entity’s Own Equity, to determine the appropriate treatment. The Company concluded that the 2023 Pre-Funded Warrants are both indexed to its own stock and meet all other conditions for equity classification. Accordingly, the Company has classified the 2023 Pre-Funded Warrants as permanent equity.

Increase of Authorized Shares and Reverse Stock Split

Effective on September 15, 2022, the number of authorized shares of the Company’s common stock was increased from 200,000,000 shares (on a pre-split basis) to 700,000,000 shares (on a pre-split basis).

On September 16, 2022, the number of authorized shares of the Company’s common stock was proportionately adjusted from 700,000,000 to 70,000,000 as a result of the Reverse Stock Split. Immediately following the Reverse Stock Split, and without giving effect to the shares of the Company’s common stock issued in connection with the Merger and the 2022 Private Placement, there were approximately 6.3 million shares of the Company’s common stock outstanding. The Company’s common stock began trading on The Nasdaq Global Select Market on a split-adjusted basis on September 19, 2022.

No fractional shares were issued in connection with the Reverse Stock Split. Any fractional shares resulting from the Reverse Stock Split were rounded down to the nearest whole number, and each stockholder who would have otherwise been entitled to a fraction of a share of common stock upon the Reverse Stock Split (after aggregating all fractions of a share to which such stockholder would have otherwise been entitled) was, in lieu thereof, entitled to receive a cash payment.

Issuance of Securities through a Private Placement

On September 16, 2022, the Company issued in a private placement 6,387,173 shares of common stock, and, in lieu of shares of common stock, the 2022 Pre-Funded Warrants to purchase an aggregate of 7,426,739 shares of common stock, and, in each case, the accompanying 2022 Warrants to purchase an aggregate of up to 13,813,912 additional shares of common stock (or 2022 Pre-Funded Warrants to purchase common stock in lieu thereof) at a price of $10.34 per share and accompanying 2022 Warrant (or $10.33 per 2022 Pre-Funded Warrant and accompanying 2022 Warrant). The 2022 Private Placement resulted in aggregate gross proceeds of $129.9 million, before $10.1 million of transaction costs.

On December 8, 2020, through a private placement, the Company issued 1,031,250 shares of common stock, and, in lieu of shares of common stock, pre-funded warrants to purchase an aggregate of 100,000 shares of common stock (the “2020 Pre-Funded Warrants”), and, in each case, accompanying warrants (the “2020 Warrants”) to purchase an aggregate of up to 282,809 additional shares of common stock (or 2020 Pre-Funded Warrants to purchase common stock in lieu thereof) at a price of $80.00 per share and accompanying 2020 Warrant (or $79.90 per 2020 Pre-Funded

Warrant and accompanying 2020 Warrant). The 2020 Private Placement resulted in aggregate gross proceeds of $90.5 million, before $0.4 million of transaction costs.

In the event of certain fundamental transactions involving the Company, holders of the 2022 Warrants and 2020 Warrants may require the Company to make a payment based on a Black-Scholes valuation, using specified inputs. The holders of 2022 Pre-Funded Warrants and 2020 Pre-Funded Warrants do not have similar rights. Therefore, the Company accounted for the 2022 Warrants and 2020 Warrants as liabilities, while the 2022 Pre-Funded Warrants and 2020 Pre-Funded Warrants met the permanent equity criteria classification. The 2022 Pre-Funded Warrants and 2020 Pre-Funded Warrants are classified as a component of permanent equity because they are freestanding financial instruments that are legally detachable and separately exercisable from the shares of common stock with which they were issued, are immediately exercisable, do not embody an obligation for the Company to repurchase its shares, and permit the holders to receive a fixed number of shares of common stock upon exercise. In addition, the 2022 Pre-Funded Warrants and 2020 Pre-Funded Warrants do not provide any guarantee of value or return. The initial fair value of the 2022 Warrants and 2020 Warrants was $64.7 million and $19.3 million, respectively, determined using the Black-Scholes valuation model. The Company remeasured the aggregate fair value of the 2022 Warrants and 2020 Warrants at December 31, 2023 and 2022 as $61.7 million and $24.5 million, respectively. The change in fair value of $37.3 million (loss) and $43.2 million (gain) was recorded in the Company’s consolidated statement of operations for the years ended December 31, 2023 and 2022, respectively.