Five Prime Announces Closing of Upsized Public Offering of Common Stock

SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Five Prime Therapeutics, Inc. (Nasdaq: FPRX) announced today the closing of its upsized underwritten public offering of 8,280,000 shares of its common stock, which includes 1,080,000 shares sold upon the underwriters’ full exercise of their option to purchase additional shares, resulting in aggregate gross proceeds of approximately $173.9 million, before deducting underwriting discounts and commissions and estimated offering expenses payable by Five Prime.