Quince Therapeutics, Inc.

In addition to the other information set forth below and elsewhere in this report, you should carefully consider the factors discussed in "Part I, Item 1A. Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2024, which could materially affect our business, financial condition or future results. We may be unable for many reasons, including those that are beyond our control, to implement our business strategy successfully. The occurrence of any single risk or any combination of risks could materially and adversely affect our business, financial condition, results of operations, cash flows and the trading price of our common stock. As of the date of this report there has been no material change in any of the risk factors described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, except as set forth below.

Sales of a substantial number of shares of our common stock in the public market, or the perception that these sales might occur, could depress the market price of our common stock and could impair our ability to raise capital through the sale of additional equity securities. Certain holders of our common stock have rights, subject to conditions, to require us to file registration statements covering their shares or to include their shares in Securities Act registration statements that we may file for ourselves or other stockholders. Once we register these shares, they can be freely sold in the public market.

Moreover, we have also registered under the Securities Act shares of common stock that we may issue under our equity compensation plans. The issuance of shares under awards granted under existing or future employee equity benefit plans may cause immediate and substantial dilution to our existing stockholders. In the future, we may issue additional shares of common stock or other equity or debt securities convertible into common stock in connection with a financing, acquisition, litigation settlement, employee arrangements or otherwise. Any such issuance could result in substantial dilution to our existing stockholders and could cause our stock price to decline.

In addition, we have filed a shelf registration statement on Form S-3, or the Shelf Registration Statement, which permits us to sell from time-to-time up to $200.0 million of additional shares of our common stock or other securities in one or more offerings. In particular, we may offer and sell up to $75.0 million of shares of our common stock from time to time pursuant to the Controlled Equity Offering SM Sales Agreement dated December 18, 2024, or the Sales Agreement, that we have entered into with Cantor Fitzgerald & Co. and H.C. Wainwright & Co., LLC. During the nine months ended September 30, 2025, we utilized our ATM program to raise net proceeds of $4.3 million by issuing 3,637,334 shares of common stock. In October 2025, we utilized our ATM program to raise net proceeds of $2.0 million by issuing 1,186,525 shares of common stock. Depending on market liquidity at the time, sales of our common stock pursuant to the Sales Agreement, or other sales of our common stock or other securities under the Shelf Registration Statement, may cause the trading price of our common stock to decline.

Furthermore, we have warrants currently outstanding which may be immediately exercised to purchase shares of common stock. To the extent that these warrants are exercised, or to the extent we issue additional shares of common stock in the future, as the case may be, there will be further dilution to holders of shares of the common stock.

Our outstanding warrants include put rights upon the occurrence of a fundamental transaction, which could make it difficult for us to complete a fundamental transaction that would otherwise be beneficial to our stockholders.

Our outstanding warrants include provisions that, in the event of certain fundamental transactions defined in the relevant agreements, provide the holders of such warrants with the right to require us, or the successor company in such transaction, to repurchase any unexercised portion of such warrants from the holder at their Black-Scholes value. In some circumstance this repurchase must be made in cash. Such Black-Scholes value may be significant and the requirement to pay such amount could prevent us from completing a transaction which would otherwise be accretive to shareholders or make such transaction more costly and reduce the value of such transaction to holders of our common stock.