We anticipate incurring additional losses until such time, if ever, that we can generate significant sales of ONS-5010 or any other product candidate we may develop. We will need additional financing to fund our operations and to commercially develop ONS-5010 or any other product candidate we may develop and to continue as a going concern. Management is currently evaluating various strategic opportunities to obtain the required funding for future operations. These strategies may include but are not limited to potential licensing and/or marketing arrangements or collaborations with pharmaceutical or other companies, the issuance of equity securities, including through an at-the-market offering program, the issuance of additional debt, and revenues from potential future product sales, if any. Alternatively, we may be required to, among other things, modify our clinical trial plans for ONS-5010 in additional indications, make reductions in our workforce, scale back our plans and place certain activities on hold, discontinue our development programs, liquidate all or a portion of our assets, and/or seek protection under the provisions of the U.S. Bankruptcy Code.
On November 5, 2020, we received $10.0 million in net proceeds from the issuance of an unsecured promissory note, or 2020 Note, with a face amount of $10.2 million. The 2020 Note bore interest at a rate of 7.5% per annum, and was due to mature on January 1, 2022, and included an original issue discount of $0.2 million. On November 16, 2021, we entered into a note amendment, which, among other things, (i) extended the maturity date to January 1, 2023, (ii) increased the interest rate from 7.5% per annum to 10% per annum beginning on January 1, 2022, and (iii) provided for the lender’s right to redeem some or all of the outstanding balance of the 2020 Note for shares of our common stock beginning July 1, 2022, subject to certain limitations. On June 30, 2022, we prepaid the 2020 Note in full by paying 105% of the outstanding balance. The total payment was $12.9 million, which included interest of $1.5 million and other fees totaling $1.2 million.
On November 16, 2021, we received $10.0 million in net proceeds from the issuance of the November 2021 Note, with a face amount of $10.2 million. The November 2021 Note bore interest at a rate of 9.5% per annum, was due to mature January 1, 2023 and included an original issue discount of $0.2 million. We may prepay all or a portion of the note at any time by paying 105% of the outstanding balance elected for pre-payment. On December 28, 2022, we prepaid the November 2021 Note in full by paying 105% of the outstanding balance. The total payment was $11.9 million, which included interest of $1.2 million and a prepayment fee of $0.6 million.
In November 2021, we issued in an underwritten public offering an aggregate of 46,000,000 shares of common stock at a purchase price per share of $1.25 for $54.0 million in net proceeds after payment of underwriter discounts and commissions and other underwriter offering costs. GMS Ventures purchased an aggregate of 16,000,000 shares of common stock in the public offering. In connection with the underwritten public offering, we issued the underwriter warrants to purchase up to an aggregate of 2,100,000 shares of common stock at an exercise price of $1.5625 per share, which warrants have a five-year term.
During the six months ended March 31, 2023, we sold 895,391 shares of common stock pursuant to the ATM Offering, generating $1.1 million in gross proceeds. The sales agent fees paid were immaterial. During the six months ended March 31, 2022, the Company sold 3,290,439 shares of common stock under the ATM Offering and generated $6.6 million in gross proceeds and paid fees to the Agent and other issuance costs of $0.2 million.
In December 2022, in a registered direct equity offering to certain institutional and accredited investors, including GMS Ventures, our largest stockholder, we issued 28,460,831 shares of common stock at a purchase price per share of $0.8784 for $24.0 million in net proceeds after payment of placement agent fees and other offering costs. GMS Ventures purchased an aggregate of 14,230,418 shares of common stock in the registered direct equity offering. In connection with the registered direct equity offering, we issued to M.S. Howells & Co., as placement agent for certain accredited investors in the offering, warrants to purchase up to an aggregate of 515,755 shares of common stock, which will be exercisable commencing on the one-year anniversary of the closing of the offering at an exercise price of $1.05 per share, which warrants have a three-year term.
On December 22, 2022, we entered into a Securities Purchase Agreement and issued an unsecured convertible promissory note with a face amount of $31.8 million, or the December 2022 Note, to Streeterville Capital, LLC, or the Lender, the current holder of our outstanding unsecured promissory note that was due to mature on January 1, 2023, or the November 2021 Note. The Note has an original issue discount of $1.8 million. We received gross proceeds of $30.0 million upon the closing on December 28, 2022, after deducting the Lender’s transaction costs in connection with the issuance. A portion of the proceeds from the December 2022 Note were used to repay in full the remaining outstanding principal and accrued interest on the November 2021 Note, which was cancelled upon repayment. The December 2022 Note bears interest at