argenx announces closing of U.S. public offering for gross proceeds of approximately $300.6 million


argenx (Euronext & Nasdaq: ARGX) a clinical-stage biotechnology company developing a deep pipeline of differentiated antibody-based therapies for the treatment of severe autoimmune diseases and cancer, announced today the closing of its public offering in the United States and an offering in Europe only to qualified investors (within the meaning of Directive 2003/71/EC, as amended) (the Offering) of 3,475,000 American Depositary Shares (ADSs) at a price to the public of $86.50 per ADS, for gross proceeds of approximately $300.6 million, before deducting underwriting discounts and commissions and offering expenses payable by argenx.

Each of the ADSs offered represents the right to receive one ordinary share, nominal value of €0.10 per share. All of the ADSs in the Offering were offered by argenx.


argenx has granted the underwriters an option to purchase up to an additional 521,250 ADSs, representing 15% of the ADSs sold in the Offering. This option can be exercised during the 30-day period commencing September 18, 2018.


argenx's ADSs are currently listed on the Nasdaq Global Select Market under the symbol "ARGX" and argenx's ordinary shares are currently listed on Euronext Brussels under the symbol "ARGX."


Morgan Stanley, Cowen and Evercore ISI acted as joint bookrunning managers for the Offering, and Kempen and Nomura acted as co-managers. Piper Jaffray acted as a financial advisor in connection with the Offering.


The securities were offered pursuant to an automatically effective shelf registration statement that was previously filed with the Securities and Exchange Commission (SEC). A preliminary prospectus supplement relating to and describing the terms of the Offering has been filed with the SEC and will be available on the SEC's website at Copies of the final prospectus supplement and the accompanying prospectus relating to the Offering may be obtained for free from Morgan Stanley & Co. LLC, 180 Varick Street, 2nd Floor, New York, New York 10014, United States, Attention: Prospectus Department; from Cowen and Company, LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, Attn: Prospectus Department, by telephone at (631) 274-2806 or by fax at (631) 254-7140; or Evercore Group L.L.C., Attention: Equity Capital Markets, 55 East 52nd Street, 36th Floor, New York, NY 10055, or by telephone at (888) 474-0200.


In addition, argenx announced today the listing of and the commencement of dealings in its 3,475,000 new ordinary shares underlying the ADSs (the New Ordinary Shares) on the regulated market of Euronext Brussels, effective today, September 21, 2018, following Euronext Brussels' approval of argenx's request for the admission to listing and trading of the New Ordinary Shares on the regulated market of Euronext Brussels. A listing prospectus for the purpose of Article 3, §3 of the Directive 2003/71/EC of the European Parliament and of the Council of November 4, 2003, as amended, including by Directive 2010/73/EU, has been prepared in accordance with Chapter 5.1 of the Dutch Financial Supervision Act (Wet op het financieel toezicht) for the admission to listing and trading of the New Ordinary Shares. This listing prospectus was approved by the Dutch Authority for the Financial Markets (Stichting Autoriteit Financiële Markten) (the AFM), on September 20, 2018 and notified by the AFM to the Belgian Financial Services and Markets Authority (Autoriteit voor Financiële Diensten en Markten), for passporting in accordance with article 18 of the Prospectus Directive. The listing prospectus is available on argenx's website (


This press release is for information purposes only and does not constitute, and should not be construed as, an offer to sell or the solicitation of an offer to buy or subscribe to any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale is not permitted or to any person or entity to whom it is unlawful to make such offer, solicitation or sale. Reference is also made to the restrictions set out in "Important information" below. This press release is not for publication or distribution, directly or indirectly, in or into any state or jurisdiction into which doing so would be unlawful or where a prior registration or approval is required for such purpose.


argenx is a clinical-stage biotechnology company developing a deep pipeline of differentiated antibody-based therapies for the treatment of severe auto-immune diseases and cancer. The company is focused on developing product candidates with the potential to be either first-in-class against novel targets or best-in-class against known, but complex, targets in order to treat diseases with a significant unmet medical need. argenx's ability to execute on this focus is enabled by its suite of differentiated technologies. The SIMPLE AntibodyTM Platform, based on the powerful llama immune system, allows argenx to exploit novel and complex targets, and its three complementary Fc engineering technologies are designed to expand the therapeutic index of its product candidates.  



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