78 We have based these estimates on assumptions that may prove to be wrong, and we could deplete our capital resources sooner than we expect. The timing and amount of our operating expenditures and capital requirements will depend on many factors, including: • the scope, timing, rate of progress and costs of our drug discovery, preclinical development activities, laboratory testing and clinical trials for our product candidates; • the number and scope of clinical programs we decide to pursue; • the scope and costs of manufacturing development and commercial manufacturing activities; • the extent to which we acquire or in-license other product candidates and technologies; • the cost, timing and outcome of regulatory review of our product candidates; • the costs of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending intellectual property-related claims; • our ability to establish and maintain collaborations on favorable terms, if at all; • our efforts to enhance operational systems and our ability to attract, hire and retain qualified personnel, including personnel to support the development of our product candidates; • the costs associated with being a public company; and • the cost and timing associated with commercializing our product candidates, if they receive marketing approval. A change in the outcome of any of these or other variables with respect to the development of any of our product candidates could significantly change the costs and timing associated with the development of that product candidate. Furthermore, our operating plans may change in the future, and we will continue to require additional capital to meet operational needs and capital requirements associated with such operating plans. If we raise additional funds by issuing equity securities, our stockholders may experience dilution. Any future debt financing into which we enter may impose upon us additional covenants that restrict our operations, including limitations on our ability to incur liens or additional debt, pay dividends, repurchase our common stock, make certain investments and engage in certain merger, consolidation or asset sale transactions. Any debt financing or additional equity that we raise may contain terms that are not favorable to us or our stockholders. If we are unable to raise additional funds when needed, we may be required to delay, reduce, or terminate some or all of our development programs and clinical trials. We may also be required to sell or license rights to our product candidates in certain territories or indications to others that we would prefer to develop and commercialize ourselves. The significant uncertainties caused by health epidemics, the ongoing conflict in Ukraine, inflation, rising interest rates, bank failures, lower consumer confidence, ongoing supply chain disruptions and volatile equity capital markets may also negatively impact our operations and capital resources. We and our key clinical and manufacturing partners have been able to continue to advance our operations, and we continue to monitor the impact of the aforementioned events on our ability to continue the development of, and seek regulatory approvals for, our product candidates, and begin to commercialize any approved products. One or more of these events may ultimately have a material adverse effect on our liquidity and operating plans. Adequate additional funding may not be available to us on acceptable terms or at all. Our failure to raise capital as and when needed could have a negative impact on our financial condition and our ability to pursue our business strategies. See the section titled “Risk Factors” for additional risks associated with our substantial capital requirements. Summary Statement of Cash Flows The following table sets forth the primary sources and uses of cash for each of the periods presented below: Year Ended December 31, 2022 2021 Net cash provided by (used in): Operating activities........................................................................................................ $ (206,459) $ (182,270) Investing activities ......................................................................................................... (336,513) (38,798) Financing activities........................................................................................................ 1,895 8,182 Net increase (decrease) in cash, cash equivalents and restricted cash........................... $ (541,077) $ (212,886)