ObsEva Announces Launch of Proposed Follow-on Public Offering

ObsEva SA / ObsEva Announces Launch of Proposed Follow-on Public Offering . Processed and transmitted by Nasdaq Corporate Solutions. The issuer is solely responsible for the content of this announcement.

Geneva, Switzerland and Boston, MA - June 18, 2018 - ObsEva SA (NASDAQ: OBSV), a clinical-stage biopharmaceutical company focused on the development and commercialization of novel therapeutics for serious conditions that compromise a woman's reproductive health and pregnancy, announced today the launch of a proposed underwritten public offering of 4,750,000 common shares. In addition, ObsEva expects to grant the underwriters a 30-day option to purchase up to an additional 712,500 common shares. ObsEva intends to use the net proceeds from the proposed offering primarily to continue the development of its three new chemical entities in its pipeline and invest in pre-commercial activates in support of its pipeline assets, and for working capital and other general corporate purposes.

J.P. Morgan Securities LLC, Credit Suisse Securities (USA) LLC and Jefferies LLC are acting as joint bookrunning managers. The offering is subject to market conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

The securities described above are being offered pursuant to a shelf registration statement on Form F-3 that was declared effective by the U.S. Securities and Exchange Commission (the "SEC") on March 2, 2018. The offering will be made only by means of a written prospectus and prospectus supplement that form a part of the registration statement. A preliminary prospectus supplement and accompanying prospectus relating to the offering will be filed with the SEC and once filed will be available on the SEC's website at www.sec.gov. Copies of the preliminary prospectus supplement and the accompanying prospectus may also be obtained by request from J.P. Morgan Securities LLC, Attention: Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by telephone at [phone]; from Credit Suisse Securities (USA) LLC, Attention: Prospectus Department, One Madison Avenue, New York, NY, 10010, by telephone at [phone], or by e-mail at [e-mail]; or from Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, 2nd Floor, New York, NY 10022, by e-mail at [e-mail] or by telephone at [phone].