SB 11285, which
F-star
acquired pursuant to a business combination with Spring Bank Pharmaceuticals, Inc. (“Spring Bank”), is a next generation cyclic dinucleotide STimulator of INterferon Gene (“STING”) agonist designed to improve checkpoint inhibition outcomes as an immunotherapeutic compound for the treatment of selected cancers. SB 11285 appeared to be well tolerated both alone and in combination with atezolizumab across all dose levels tested
to-date,
including five dose levels as monotherapy and three dose levels as a combination. Initial analysis showed that pharmacokinetics (PK) were
in-line
with the predicted profile for rapid cellular uptake, a characteristic of second generation STING agonists.
F-star
is continuing with further dose-escalation and in parallel pursuing strategic business development opportunities for SB 11285. In June 2021, a U.S. patent was granted to
F-star
with claims protecting the composition of matter of SB 11285.
On November 20, 2020,
F-star
Therapeutics, Inc., formerly known as Spring Bank Pharmaceuticals, Inc., completed a business combination (the “Transaction”) with
F-star
Therapeutics Limited
(“F-star
Ltd”) in accordance with the terms of the Share Exchange Agreement, dated July 29, 2020 (the “Exchange Agreement”), by and among the Company,
F-star
Ltd and certain holders of the capital stock and convertible notes of
F-star
Ltd (each a “Seller”, and collectively with holders of
F-star
Ltd securities who subsequently became parties to the Exchange Agreement, the “Sellers”). Pursuant to the Exchange Agreement, each ordinary share of
F-star
Ltd outstanding immediately prior to the closing of the Transaction (the “Closing”) was exchanged by the Sellers that owned such
F-star
Ltd shares for a number of duly authorized, validly issued, fully paid and
non-assessable
shares of Company common stock pursuant to an exchange ratio formula as set forth in the Exchange Agreement (the “Exchange Ratio”), rounded to the nearest whole share of Company common stock (after aggregating all fractional shares of Company common stock issuable to such Seller). Also, on November 20, 2020, in connection with, and prior to completion of, the Transaction, Spring Bank effected a
reverse stock split of its common stock (the “Reverse Stock Split”) and, following the completion of the Transaction, changed its name to F-star Therapeutics, Inc. Following the completion of the Transaction, the business of the Company became the business conducted by
F-star,
which is a clinical-stage immuno-oncology company focused on cancer treatment through its proprietary tetravalent bispecific antibody programs. Unless otherwise noted, all references to share amounts in this report reflect the Reverse Stock Split.
Under the terms of the Exchange Agreement, at the Closing, Spring Bank issued an aggregate of 4,620,618 shares of its common stock to
F-star
Ltd stockholders, based on an Exchange Ratio of 0.1125 shares of Spring Bank common stock for each
F-star
Ltd ordinary share, stock option and restricted stock unit (“RSU”) outstanding immediately prior to the Closing. The Exchange Ratio was determined through arms-length negotiations between Spring Bank and
F-star
Ltd pursuant to a formula set forth in the Exchange Agreement.
Pursuant to the Exchange Agreement, immediately prior to the Closing, certain investors in
F-star
Ltd purchased $15.0 million of
F-star
Ltd ordinary shares (the
“Pre-Closing
Financing”). These ordinary shares of
F-star
Ltd were then exchanged at the Closing for shares of the Company’s common stock in the Transaction at the Exchange Ratio.
Pursuant to the Exchange Agreement, all outstanding options to purchase Spring Bank common stock were accelerated immediately prior to the Closing and each outstanding option with an exercise price greater than the closing price of the stock on the Closing Date was exercised in full and all other outstanding options to purchase Company common stock were cancelled effective as of the Closing Date.
Immediately following the Reverse Stock Split and the Closing, there were approximately 4,449,559 shares of Spring Bank common stock outstanding. Following the Closing, the
F-star
Ltd stockholders beneficially owned approximately 53.7% of the combined company’s common stock, and the existing stockholders of Spring Bank beneficially owned approximately 46.3% of the combined company’s common stock. Concurrently with the execution of the Exchange Agreement, certain officers and directors of Spring Bank and
F-star
Ltd and certain stockholders of
F-star
Ltd entered into
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
Ltd subscribed for in the
Pre-Closing
Financing and pursuant to certain other limited exceptions.
In addition, at the Closing, Spring Bank,
F-star
Ltd, a representative of Spring Bank stockholders prior to the Closing, and Computershare Trust Company N.A., as the Rights Agent, entered into a STING Agonist Contingent Value Rights Agreement (the “STING Agonist CVR Agreement”). Pursuant to the Exchange Agreement and the STING Agonist CVR Agreement, each
pre-Reverse
Stock Split share of Spring Bank common stock held by stockholders as of the record date on November 19, 2020, immediately prior to the Closing, received a dividend of one contingent value right (“CVR”) (“STING Agonist CVR”), payable on a
pre-Reverse
Stock Split basis, entitling such holders to receive, in connection with certain transactions involving proprietary STING agonist compound designated as SB 11285 occurring on or prior to the STING Agonist CVR Expiration Date (as defined below) that resulted in aggregate Net Proceeds (as defined in the STING Agonist CVR Agreement) at least equal to the Target Payment Amount (as defined below), an aggregate amount equal to the greater of (i) 25% of the Net Proceeds received from all CVR Transactions (as defined in the STING Agonist CVR Agreement) and (ii) an aggregate amount equal to the product of $1.00 and the total number of shares of Company common stock outstanding as of such record date (not to exceed an aggregate amount of $18.0 million) (the “Target Payment Amount”).