On May 12, 2022, we entered into an Open Market Sale AgreementSM (the “Sale Agreement”) with Jefferies LLC, as sales agent (the “Agent”), pursuant to which we may offer and sell shares of our common stock from time to time through the Agent (the “Offering”). We also filed a prospectus supplement, dated May 12, 2022, with the SEC in connection with the Offering (the “Prospectus Supplement”) under our existing shelf Registration Statement on Form S-3, as amended (File No. 333-251356), which became effective on December 23, 2020 (the “Registration Statement”). Pursuant to the Prospectus Supplement, we may offer and sell shares having an aggregate offering price of up to $50.0 million. Under the terms of the Sale Agreement, the Agent is entitled to a commission at a fixed rate of 3.0% of the gross proceeds from each sale of shares under the Sale Agreement. We also reimburse the Agent for certain expenses incurred in connection with the Sale Agreement, and agreed to provide indemnification and contribution to the Agent with respect to certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”), and the Exchange Act. During the year ended December 31, 2022, we sold an aggregate of 350,000 shares under the Sale Agreement, receiving net proceeds of $0.5 million. We currently intend to use any net proceeds from the Offering for general corporate purposes and to advance the development of our product candidates.
As of December 31, 2022, we had approximately $94.6 million available under the Registration Statement (inclusive of the $49.5 million that remained allocated to sales of shares of our common stock pursuant to the Sale Agreement as of such date).
On November 23, 2021, we entered into a Securities Purchase Agreement (the “Securities Purchase Agreement”) with Lind Global Asset Management V, LLC (“Lind V”) pursuant to which, among other things, on November 23, 2021, we issued and sold to Lind V, in a private placement transaction, in exchange for the payment by Lind V of $20.0 million, (1) a convertible promissory note (the “2021 Note”) in an aggregate principal amount of $22.0 million, which will bear no interest until the first anniversary of the issuance of the First Note and will thereafter bear interest at a rate of 5% per annum, and mature on November 23, 2024, and (2) 534,759 shares (the “2021 Closing Shares”) of our common stock.
See Note 9 to our consolidated financial statements for further discussion.
On December 2, 2021, we entered into two separate securities purchase agreements with certain accredited investors on substantially the same terms as the Securities Purchase Agreement, pursuant to which we sold, in private placement transactions, in exchange for the payment by the accredited investors of an aggregate of $201,534, (i) convertible promissory notes (the “December 2021 Notes”) in an aggregate principal amount of $221,688, which will bear no interest and mature on December 2, 2024, and (ii) an aggregate of 5,388 shares of our common stock. The December 2021 Notes have substantially the same terms as the 2021 Note. On February 22, 2023, the December 2021 Notes were repaid in full.
On May 24, 2021, we completed an underwritten public offering pursuant to which we sold 22,258,066 shares of our common stock at a price to the public of $3.10 per share, which included the exercise in full by the underwriter of its option to purchase up to 2,903,226 additional shares of common stock. The net proceeds to us from the offering were $64.5 million, after deducting underwriting discounts and commissions and other estimated offering expenses payable by us (see Note 6 to our consolidated financial statements).
On January 28, 2021, we completed an underwritten public offering pursuant to which we sold 17,530,488 shares of our common stock at a price to the public of $2.05 per share, which included the exercise in full by the underwriter of its option to purchase up to 2,286,585 additional shares of common stock. The net proceeds to us from the offering were $33.5 million, after deducting underwriting discounts and commissions and other offering expenses payable by us (see Note 6 to our consolidated financial statements).
We expect to use the net proceeds from the above transactions primarily for general corporate purposes, which may include financing our normal business operations, developing new or existing product candidates, and funding capital expenditures, acquisitions and investments.
We evaluated whether there are any conditions and events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year beyond the filing of this Annual Report on Form 10-K. Based on such evaluation and our current plans (including the ongoing clinical programs for SLS-002, SLS-005, and other product candidates), which are subject to change, management believes that our existing cash and cash equivalents as of December 31, 2022 are not sufficient to satisfy our operating cash needs for the year after the filing of this Annual Report on Form 10-K, and there is substantial doubt of our ability to continue as a going concern within one year beyond the date of filing of this Annual Report on Form 10-K.