The Company has retained its transfer agent, Computershare Trust Company, N.A. ("Computershare"), to act as its exchange agent for the reverse split. Computershare will provide stockholders and warrant holders of record as of the effective date of the reverse stock split instructions for the exchange of their certificates and/or warrants. Stockholders owning shares and/or warrants via a broker or other nominee will have their positions automatically adjusted to reflect the reverse stock split, subject to brokers' particular processes, and will not be required to take any action in connection with the reverse stock split. More information regarding the reverse stock split can be found in the proxy statement filed by the Company with the Securities and Exchange Commission on Schedule 14A on August 5, 2019. About SELLAS Life Sciences Group, Inc. SELLAS is a clinical-stage biopharmaceutical company focused on novel cancer immunotherapeutics for a broad range of cancer indications.