On December 23, 2022, we entered into a sales agreement with Cantor Fitzgerald & Co. and B. Riley Securities, Inc. (the “Sales Agents”), providing for the offering, issuance and sale by us of up to $40.0 million of our common stock from time to time in “at-the-market” offerings (the “ATM”). We sold 1,105,178 shares of common stock under the ATM during the six months ended June 30, 2023 for gross proceeds of approximately $2.5 million. As of June 30, 2023, there was approximately $37.5 million of common stock remaining available for sale under the ATM.
On March 10, 2023, we entered into a purchase agreement with Lincoln Park Capital Fund, LLC (“Lincoln Park”) for an equity line financing (the “Lincoln Park Purchase Agreement”). The Lincoln Park Purchase Agreement provides that, subject to the terms and conditions set forth therein, we have the right, but not the obligation, to direct Lincoln Park to purchase up to $35 million of shares of common stock at our sole discretion, over a 36-month period commencing on March 10, 2023. We filed a prospectus supplement to our registration statement on Form S-3 (File No. 333-268992) covering the resale of shares of common stock that are issued under the Lincoln Park Purchase Agreement. As of June 30, 2023, we had not sold any shares of our common stock to Lincoln Park.
We expect to continue to incur significant and increasing expenses and net losses for the foreseeable future, as we advance our current and future product candidates through preclinical and clinical development, manufacture drug product and drug supply, seek regulatory approval for our current and future product candidates, maintain and expand our intellectual property portfolio, hire additional research and development and business personnel and operate as a public company. We will not generate revenue from product sales unless and until we successfully complete clinical development and obtain regulatory approval for our product candidates. In addition, if we obtain regulatory approval for our product candidates and do not enter into a third-party commercialization partnership, we expect to incur significant expenses related to developing our commercialization capability to support product sales, marketing, manufacturing and distribution activities.
As a result, we will need substantial additional funding to support our continuing operations and pursue our growth strategy. Until we can generate significant revenue from product sales, if ever, we expect to finance our operations through a combination of public or private equity offerings, debt financings or other sources, such as potential collaboration agreements and strategic alliances, licensing or similar arrangements with third parties. To the extent available, we expect to continue our pursuit of non-dilutive research contributions, or grants, including additional NIA grant funding. However, we may fail to receive additional NIA grants, or we may be unable to raise additional funds or enter into such other agreements or arrangements when needed on acceptable terms, or at all. Our failure to obtain additional NIA grants or raise capital or enter into such agreements as and when needed could have a material adverse effect on our business, results of operations and financial condition.
Because of the numerous risks and uncertainties associated with product development, we are unable to accurately predict the timing or amount of increased expenses or when, or if, we will be able to achieve profitability. Even if we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. If we fail to become profitable or are unable to sustain profitability on a continuing basis, then we may be unable to raise capital, maintain our research and development efforts, expand our business or continue our operations at planned levels, and as a result we may be forced to substantially reduce or terminate our operations.
We do not own or operate manufacturing facilities. We rely, and expect to continue to rely, on third parties for the manufacture of CT1812 for preclinical studies and clinical trials, as well as for commercial manufacture if CT1812 obtains marketing approval. We also rely, and expect to continue to rely, on third parties to manufacture, package, label, store, and distribute CT1812, if marketing approval is obtained. We believe that this strategy allows us to maintain a more efficient infrastructure by eliminating the need for us to invest in our own manufacturing facilities, equipment, and personnel while also enabling us to focus our expertise and resources on the development of CT1812.
Impact of COVID-19 on Our Business
Our business has been and could be adversely affected by the effects of the COVID-19 pandemic or other national health issues. For example, our ongoing and/or planned clinical trials may be impacted by interruptions or delays in the operations of the FDA and comparable foreign regulatory authorities. Additionally, we have made certain adjustments to the operation of our trials in an effort to ensure the monitoring and safety of patients and minimize risks to trial integrity