FSTX

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From June 30, 2022 to September 30, 2022 Issuance of common stock for services rendered RSU vesting, net of shares repurchased to cover tax withholding

From March 31, 2022 to June 30, 2022 Issuance of common stock in connection with at-the-market offering, net of issuance costs RSU vesting, net of shares repurchased to cover tax withholding

From December 31, 2021 to March 31, 2022 Issuance of common stock in connection with at-the- market offering, net of issuance costs RSU vesting, net of shares repurchased to cover tax withholding

From December 31, 2020 to December 31, 2021 Issuance of common stock in connection with at-the-market offering, net of issuance costs Issuance of common stock in connection with public offering, net of issuance costs RSU vesting and stock option exercises

From March 31, 2021 to June 30, 2021 Issuance of common stock in connection with at-the-market offering, net of issuance costs Issuance of common stock in connection with public offering, net of issuance costs Stock option exercises

1.Common stock offered by the company 9,285,715 shares. 2.The number of shares of common stock that will be outstanding immediately after this offering as shown above is based on 9,100,117 shares of common stock issued and outstanding as of December 31, 2020.

From December 31, 2020 To March 31, 2021 Stock option exercises

From December 31, 2019 to December 31, 2020 Exchange of common stock in connection of the transaction, net of issuance costs Issuance of common stock for services rendered Issuance of common stock in connection with at-the-market offering, net of issuance costs Issuance of common stock pursuant to vesting of restricted stock units Purchase of fractional shares Issuance of ordinary shares for professional services

Immediately following the Reverse Stock Split and the Closing, there were approximately 4,449,800 shares of the Company’s common stock outstanding. Following the Closing, the former F-star shareholders beneficially owned approximately 53.7% of the Company’s common stock and the existing stockholders of the Company beneficially owned approximately 46.3% of the Company’s common stock outstanding. Concurrently with the execution of the Exchange Agreement, certain officers and directors of the Company and F-star and certain shareholders of F-star entered into lock-up agreements (the “Lock-up Agreements”), pursuant to which they agreed to certain restrictions on transfers of any shares of the Company’s common stock for the 180-day period following the Closing, other than the shares of the Company’s common stock received in exchange for ordinary shares of F-star subscribed for in the Pre-Closing Financing and pursuant to certain other limited exceptions.

From June 30, 2020 to September 30, 2020 Issuance of common stock for services rendered

From March 31, 2020 to June 30, 2020 Issuance of common stock for services rendered Issuance of common stock in connection with at-the-market offering, net of issuance costs

From December 31, 2019 to March 31, 2020 Issuance of common stock for services rendered Issuance of common stock in connection with at-the-market offering, net of issuance costs

from December 31, 2018 to December 31, 2019 Issuance of common stock for services rendered Issuance of common stock in connection with at-the-market offering

from June 30, 2019 to September 30, 2019 Issuance of common stock for services rendered

from March 31, 2019 to June 30,2019 Issuance of common stock for services rendered Issuance of common stock in connection with at-the-market offering

from December 31, 2018 to March 31, 2019 Issuance of common stock for services rendered

from December 31, 2017 to December 31, 2018 Issuance of common stock for services rendered Issuance of common stock in connection with offering, net of issuance costs of $2,618 Issuance of common stock in connection with at-the-market offering, net of issuance costs of $140

from December 31, 2016 to December 31, 2017 Issuance of common stock for services rendered Exercise of warrants Exercise of stock options Issuance of common stock in connection with offering, net of issuance costs $2,826 Issuance of common stock in connection with at-the-market offering, net of issuance costs of $273

from December 31, 2015 to December 31, 2016 Conversion of preferred stock into common stock Exercise of warrants Issuance of common stock for services rendered Exercise of stock options Issuance of common stock and warrants in connection with license agreement Issuance of common stock in connection with initial public offering, net of issuance costs of $3,113 Issuance of common stock and warrants in connection with private investment in a public entity, net of issuance costs of $1,257 A 1-for-4 reverse stock split of the Company’s common stock was effected on March 8, 2016.

A 1-for-4 reverse stock split of the Company’s common stock was effected on March 8, 2016.

from December 31, 2015 to March 09, 2016 Exercise of warrants Issuance of common stock and warrants in connection with 2014 Financing, net A 1-for-4 reverse stock split of the Company’s common stock was effected on March 8, 2016.

from December 31, 2014 to September 30, 2015 Exercise of warrants (unaudited) Issuance of common stock in connection with 2014 Financing, net (unaudited) Pro forma conversion of preferred stock into common stock (unaudited)