Underwriting Agreement

On March 29, 2022 Calithera Biosciences, Inc. reported that entered into an underwriting agreement, or the Underwriting Agreement, with SVB Securities LLC and H.C. Wainwright & Co., LLC, as representatives of the several underwriters named therein, collectively, the Underwriters, relating to the issuance and sale, or the Offering, of 18,518,519 shares of its common stock, par value $0.0001 per share, at a combined price to the public of $0.54 per share of common stock and accompanying common warrants (Filing, 8-K, Calithera Biosciences, MAR 29, 2022, View Source [SID1234611329]). Each share of common stock is accompanied by (1) warrants to purchase up to an equal number of shares of common stock at an exercise price of $0.54 per share, which are immediately exercisable and will expire 18 months from the date of issuance, or the Short-Term Warrants, and (2) warrants to purchase up to an equal number of shares of common stock at an exercise price of $0.54 per share, which are immediately exercisable and will expire 5 years from the date of issuance, or the Long-Term Warrants. Pursuant to the Underwriting Agreement, the Underwriters have agreed to purchase the shares of common stock and each accompanying Short-Term Warrant and Long-Term Warrant from Calithera at a combined price of $0.5022 per share and accompanying warrants. The net proceeds to Calithera from this Offering are expected to be approximately $8.8 million, after deducting underwriting discounts and commissions and other estimated offering expenses payable by Calithera. All of the shares and warrants in the Offering are being sold by Calithera. The closing of the Offering is expected to occur on or about April 1, 2022, subject to the satisfaction of customary closing conditions.

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The Offering is being made pursuant to our effective registration statement on Form S-3 (Registration Statement No. 333-243731), as previously filed with the Securities and Exchange Commission and a related prospectus and prospectus supplement.

The Underwriting Agreement contains customary representations, warranties and agreements by Calithera, customary conditions to closing, indemnification obligations of Calithera and the Underwriters, including for liabilities under the Securities Act of 1933, as amended, other obligations of the parties and termination provisions. The representations, warranties and covenants contained in the Underwriting Agreement were made only for purposes of such agreement and as of specific dates, were solely for the benefit of the parties to such agreement.

In connection with the Offering, Calithera will also enter into a warrant agency agreement, or the Warrant Agency Agreement, with Calithera’s transfer agent, American Stock Transfer & Trust Company LLC, who will act as warrant agent for Calithera, with respect to the Short-Term Warrants and Long-Term Warrants.

The Underwriting Agreement is filed as Exhibit 1.1 hereto, the form of Short-Term Warrant is filed as Exhibit 4.1 hereto, the form of Long-Term Warrant is filed as Exhibit 4.2 hereto and the form of Warrant Agency Agreement is filed as Exhibit 4.3 hereto. The foregoing descriptions of the terms of the Underwriting Agreement, the Short-Term Warrants, the Long-Term Warrants and the Warrant Agency Agreement are qualified in their entirety by reference to such exhibits hereto. A copy of the opinion of Cooley LLP relating to the legality of the issuance and sale of the securities in the Offering is attached as Exhibit 5.1 hereto.