Ra Pharmaceuticals Announces Closing of Public Offering and Full Exercise of Underwriters’ Option to Purchase Additional Shares

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Ra Pharmaceuticals, Inc. (Nasdaq: RARX) (“Ra Pharma”) today announced the closing of an underwritten public offering of 4,600,000 shares of its common stock, at a public offering price of $32.50 per share, including 600,000 shares sold pursuant to the underwriters’ exercise in full of their option to purchase additional shares. The gross proceeds from the offering, before deducting underwriting discounts and commissions and estimated offering expenses, were $149.5 million.