Five Prime Announces the Exercise of the Underwriters' Over-Allotment Option

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SOUTH SAN FRANCISCO, Calif., Sept. 26, 2013 (GLOBE NEWSWIRE) -- Five Prime Therapeutics, Inc. (Nasdaq:FPRX) (Five Prime) announced today that the underwriters of its initial public offering have exercised their over-allotment option in full to purchase an additional 720,000 shares of common stock from Five Prime at the initial public offering price of $13.00 per share. With the exercise of the underwriters' over-allotment option, the total number of shares sold in the offering was 5,520,000 shares, resulting in aggregate gross proceeds of $71.8 million, before underwriting discounts, commissions and expenses. All of such shares were sold by Five Prime.

Jefferies LLC, BMO Capital Markets and Wells Fargo Securities, LLC acted as joint book-running managers and Guggenheim Securities, LLC acted as a co-manager for the offering.

A registration statement relating to the common stock offered and sold by Five Prime was declared effective by the Securities and Exchange Commission on September 17, 2013. The offering was made only by means of a prospectus, copies of which may be obtained by contacting Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, 12th Floor, New York, NY 10022, telephone: 877-547-6340, e-mail: Prospectus_Department@Jefferies.com; BMO Capital Markets, Attention: Equity Syndicate Department, 3 Times Square, New York, NY 10036, telephone: 800-414-3627, e-mail: bmoprospectus@bmo.com; or Wells Fargo Securities, LLC, Attention: Capital Markets Client Support, 1525 West W.T. Harris Boulevard, NC0675, Charlotte, NC28262, telephone: 800-326-5897, e-mail: cmclientsupport@wellsfargo.com.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Five Prime

Five Prime is a clinical-stage biotechnology company focused on discovering and developing novel protein therapeutics for cancer and inflammatory diseases. Five Prime has developed a library of more than 5,600 human extracellular proteins. Five Prime screens this comprehensive library with its proprietary high-throughput protein screening technologies to identify new targets for protein therapeutics.

CONTACT: COMPANY CONTACT: Amy Kendall Corporate Communications 415-365-5776 amy.kendall@fiveprime.com

Source:Five Prime Therapeutics, Inc.