Concentration of ownership of our common stock among our existing executive officers, directors and principal stockholders may prevent new investors from influencing significant corporate decisions.
As of the closing of our IPO on October 13, 2021, our executive officers, directors and beneficial owners of 5% or more of our common stock and their respective affiliates beneficially owned approximately 51% of our outstanding common stock. As a result, these persons, acting together, would be able to significantly influence all matters requiring stockholder approval, including the election and removal of directors, any merger, consolidation, sale of all or substantially all of our assets, or other significant corporate transactions.
Some of these persons or entities may have interests different than yours. For example, because many of these stockholders purchased their shares at prices substantially below the current market price of our common stock and have held their shares for a longer period, they may be more interested in selling our company to an acquirer than other investors, or they may want us to pursue strategies that deviate from the interests of other stockholders.
Sales of a substantial number of shares of our common stock in the public market could cause our stock price to fall.
If our stockholders sell, or indicate an intention to sell, substantial amounts of our common stock in the public market after the lock-up and other legal restrictions on resale in connection with our IPO terminate, the trading price of our common stock could decline.
The lock-up agreements pertaining to our IPO will expire 180 days from the October 7, 2021. Based upon the number of shares outstanding as of September 30, 2021, after the lock-up agreements expire, up to approximately 10,931,039 additional shares of common stock will be eligible for sale in the public market, all of which shares are held by directors, executive officers, affiliates, and certain significant stockholders and will be subject to Rule 144 under the Securities Act. The underwriters may, however, in their sole discretion, permit our officers, directors and other stockholders who are subject to these lock-up agreements to sell shares prior to the expiration of the lock-up agreements.
In addition, following the closing of our IPO, we filed a registration statements on Form S-8 (File No. 333-260686) under the Securities Act, registering the issuance of 7,334,485 shares of our common stock subject to options or other equity awards issued or reserved for future issuance under our equity incentive plans. Shares registered under the registration statement on Form S-8 will be available for sale in the public market subject to vesting arrangements and exercise of options, the lock-up agreements described above and the restrictions of Rule 144 in the case of our affiliates.
Subsequent to the IPO, holders of approximately 3,377,925 shares of our common stock, or approximately 15.8% of our total outstanding shares of common stock, were entitled to rights with respect to the registration of their shares under the Securities Act, subject to the lock-up agreements described above (as applicable). Registration of these shares under the Securities Act would result in the shares becoming freely tradable without restriction under the Securities Act, except for shares purchased by affiliates. Any sales of securities by these stockholders could have a material adverse effect on the trading price of our common stock.
Our ability to use net operating loss carryforwards and other tax attributes may be limited.
As of December 31, 2020, we had federal net operating loss, or NOL, carryforwards of approximately $37.9 million and state NOL carryforwards of approximately $37.9 million available to offset future taxable income. If not utilized, the federal and state NOL carryforwards will begin to expire in various years beginning in 2027. As of December 31, 2020, we also had $3.7 million of federal research and development tax credit carryforwards available to reduce future income taxes. The federal research and development tax credits will begin to expire in 2027, if not utilized. The state research and development tax credits have no expiration date. Utilization of NOL carryforwards and credits may be subject to an annual limitation due to the “ownership change” provisions under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, or the Code. An “ownership change” is generally defined as a cumulative change in the ownership interest of significant stockholders over a rolling three-year period in excess of 50 percentage points. Similar provisions under state tax