personal liability of directors, then the liability of the registrant’s directors shall be eliminated or limited to the fullest extent permitted by the Delaware General Corporation Law, as so amended.
Section 174 of the Delaware General Corporation Law provides, among other things, that a director who willfully or negligently approves of an unlawful payment of dividends or an unlawful stock purchase or redemption may be held liable for such actions. A director who was either absent when the unlawful actions were approved, or dissented at the time, may avoid liability by causing his or her dissent to such actions to be entered in the books containing minutes of the meetings of the board of directors at the time such action occurred or immediately after such absent director receives notice of the unlawful acts.
As permitted by the Delaware General Corporation Law, the registrant has entered into separate indemnification agreements with each of the registrant’s directors and executive officers which would require the registrant, among other things, to indemnify them against certain liabilities which may arise by reason of their status as directors or executive officers.
The registrant expects to obtain and maintain insurance policies under which its directors and officers are insured, within the limits and subject to the limitations of those policies, against certain expenses in connection with the defense of, and certain liabilities which might be imposed as a result of, actions, suits or proceedings to which they are parties by reason of being or having been directors or officers. The coverage provided by these policies may apply whether or not the registrant would have the power to indemnify such person against such liability under the provisions of the Delaware General Corporation Law.
These indemnification provisions and the indemnification agreements entered into between the registrant and the registrant’s officers and directors may be sufficiently broad to permit indemnification of the registrant’s officers and directors for liabilities (including reimbursement of expenses incurred) arising under the Securities Act of 1933, as amended.
The underwriting agreement between the registrant and the underwriters filed as Exhibit 1.1 to this registration statement provides for the indemnification by the underwriters of the registrant’s directors and officers and certain controlling persons against specified liabilities, including liabilities under the Securities Act with respect to information provided by the underwriters specifically for inclusion in the registration statement. The investors’ rights agreement with certain holders of our capital stock also provides for cross-indemnification in connection with the registration of the registrant’s common stock on behalf of such holders.
Item 15. Recent Sales of Unregistered Securities
The following list sets forth information regarding all unregistered securities sold by us since January 1, 2018. No underwriters were involved in the sales and the certificates representing the securities sold and issued contain legends restricting transfer of the securities without registration under the Securities Act or an applicable exemption from registration.
(1)
In August 2018, we issued and sold to an investor an aggregate of 5,282,000 shares of our Series A convertible preferred stock at a purchase price of $1.89 per share for an aggregate purchase price of $10.0 million.
(2)
In August 2019, we issued and sold to certain investors an aggregate of 7,888,392 shares of our Series B-1 convertible preferred stock at a purchase price of $3.178 per share for an aggregate purchase price of $25.1 million.
(3)
In August 2020, we also issued and sold to certain investors an aggregate of 6,527,654 shares of our Series B-2 convertible preferred stock at a purchase price of $3.841 per share for an aggregate purchase price of $25.1 million.
(4)
In December 2020, we issued and sold to certain investors an aggregate of 12,954,423 shares of our Series C convertible preferred stock at a purchase price of $7.333 per share for an aggregate purchase price of approximately $95.0 million.
(5)
From January 2018 through March 23, 2021, we granted to certain of our employees, officers, directors, consultants and other service providers stock options to purchase an aggregate of