LEXINGTON, Mass. & LONDON--(BUSINESS WIRE)--Nightstar Therapeutics plc, a clinical-stage gene therapy company developing treatments for rare inherited retinal diseases, today announced the pricing of its initial public offering in the United States of 5,360,000 American Depositary Shares (“ADSs”) representing 5,360,000 ordinary shares at an initial public offering price of $14.00 per ADS for total gross proceeds of approximately $75.0 million. All ADSs sold in the offering were offered by Nightstar. The shares are expected to begin trading on The NASDAQ Global Select Market on September 28, 2017 under the ticker symbol “NITE.” In addition, Nightstar has granted the underwriters a 30-day option to purchase up to an additional 804,000 ADSs at the initial public offering price, less underwriting discounts and commissions. The offering is expected to close on October 2, 2017, subject to customary closing conditions.

Jefferies LLC, Leerink Partners LLC and BMO Capital Markets Corp. are acting as joint book-running managers for the offering. Wedbush Securities Inc. and Chardan are acting as co-managers.

About Nightstar

Nightstar is a leading clinical-stage gene therapy company focused on developing and commercializing novel one-time treatments for patients suffering from rare inherited retinal diseases including choroideremia, X-linked retinitis pigmentosa and Best vitelliform macular dystrophy.