ADC Therapeutics Announces Pricing of Public Offering

ADC Therapeutics SA (NYSE:ADCT), a late clinical-stage oncology-focused biotechnology company pioneering the development and commercialization of highly potent and targeted antibody drug conjugates for patients with hematological malignancies and solid tumors, announced today the pricing of an upsized public offering of 6,000,000 shares of its common shares at a price of $34.00 per share. The gross proceeds from the offering, before deducting underwriting discounts and commissions and estimated offering expenses payable by ADC Therapeutics, are expected to be approximately $204 million. The offering is expected to close on September 28, 2020, subject to customary closing conditions. In addition, certain existing shareholders have granted the underwriters a 30-day option to purchase up to 900,000 additional common shares. ADC Therapeutics will not receive any proceeds from the sale of such shares by the selling shareholders.

Morgan Stanley, BofA Securities and Cowen are acting as joint book-running managers for the offering. RBC Capital Markets is acting as co-manager for the offering.

The offering is being made only by means of a prospectus. Copies of the prospectus relating to the offering may be obtained, when available, from Morgan Stanley & Co. LLC, Attn: Prospectus Department, 180 Varick Street, 2nd Floor, New York, NY 10014 or by email at [e-mail]; BofA Securities, Inc., NC1-004-03-43, 200 North College Street, 3rd floor, Charlotte, NC 28255-0001, Attn: Prospectus Department, or by email at [e-mail]; or Cowen and Company, LLC, c/o Broadridge Financial Solutions, Attn: Prospectus Department, 1155 Long Island Avenue, Edgewood, NY 11717, by telephone at [phone] or by email at [e-mail].

A registration statement relating to these securities has been filed with, and declared effective by, the U.S. Securities and Exchange Commission. This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, 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. There is no intention or permission to publicly offer, solicit, sell or advertise, directly or indirectly, any securities of ADC Therapeutics SA, such as the common shares, in or into Switzerland within the meaning of the Swiss Financial Services Act ("FinSA") and these securities will not be listed or admitted to trading on the SIX Swiss Exchange or on any other regulated trading venue (exchange or multilateral trading facility) in Switzerland. Neither this document nor any other offering or marketing material relating to these securities, such as the common shares, constitutes or will constitute a prospectus pursuant to the FinSA, and neither this document nor any other offering or marketing material relating to the common shares constitutes a prospectus pursuant to the FinSA, and neither this document nor any other offering or marketing material relating to the common shares may be publicly distributed or otherwise made publicly available in Switzerland.