The issuance of Series A redeemable convertible preferred shares was recorded at the amount of proceeds received less issuance costs and the amounts allocated to the Series A Milestone Closing liability.
The Series A Milestone Closing occurred on December 9, 2019, and we issued 9,600,000 shares of Series A redeemable convertible preferred shares at the Series A Purchase Price for gross proceeds of $16.0 million.
Series A+ Redeemable Convertible Preferred Shares
In March 2020, we entered into a Series A+ redeemable convertible preferred shares purchase agreement with certain investors to issue and sell 12,799,681 shares of Series A+ redeemable convertible preferred shares at $2.0313 per share, for total gross proceeds of $26.0 million.
Series B Redeemable Convertible Preferred Shares
In July 2021, we entered into a Series B redeemable convertible preferred shares purchase agreement with certain investors to issue and sell 24,701,732 shares of Series B redeemable convertible preferred shares at $4.0483 per share, for total gross proceeds of $100.0 million.
In April 2022, we issued an additional 8,155,272 shares of our Series B redeemable convertible preferred shares for total gross proceeds of $33.0 million, also at $4.0483 per share.
Series B-1 Redeemable Convertible Preferred Shares
In March 2021, Basecamp Bio, Inc. (“Basecamp Bio”), our wholly owned subsidiary incorporated in February 2021, entered into a purchase agreement with certain investors to issue and sell 9,000,000 shares of its Series Seed redeemable convertible preferred shares at a price of $1.00 per share for total gross proceeds of $9.0 million. Of the 9,000,000 shares of Series Seed redeemable convertible preferred shares issued, 2,000,000 shares were issued to us and the remaining 7,000,000 shares were issued to other existing investors in Structure Therapeutics.
In December 2021, we acquired the 7,000,000 Series Seed redeemable convertible preferred shares of Basecamp Bio held by the other investors in exchange for 2,161,402 shares of our Series B-1 redeemable convertible preferred stock, with Basecamp Bio becoming a wholly owned subsidiary again.
Upon the closing of our IPO, all outstanding shares of redeemable convertible preferred stock automatically converted into 67,018,087 ordinary shares.
Funding Requirements
Prior to our IPO, we financed our operations primarily through the private placement of equity securities and have received aggregate gross proceeds of approximately $198.0 million. Since our inception, we have incurred net operating losses and negative cash flows from operations. We had net losses of $41.3 million and $27.0 million in the six months ended June 30, 2023 and 2022, respectively. As of June 30, 2023, we had an accumulated deficit of $158.2 million. In February 2023, we completed our IPO for net proceeds of $166.7 million. Our primary activities to date have included organizing and staffing our company, business and scientific planning, raising capital, conducting research and development activities, entering into strategic and corporate structuring transactions, enabling manufacturing activities in support of our product candidate development efforts, establishing our intellectual property portfolio, and providing general and administrative support for these activities.
As of June 30, 2023, we had cash, cash equivalents and short-term investments of $224.6 million. Based on our current business plan, we believe that our existing cash, cash equivalents and short-term investments will be sufficient to fund our projected operations for the next 12 months from the date of the issuance of our