BlackRock, Inc. Reports 5.4% Ownership in SELLAS LIFE SCIENCES GROUP INC

BlackRock, Inc. has filed a Schedule 13G with the SEC, disclosing a 5.4% ownership stake in SELLAS LIFE SCIENCES GROUP INC. The filing indicates that BlackRock beneficially owns 5,686,886 shares of common stock, with sole voting power over 5,604,491 shares and sole dispositive power over all 5,686,886 shares. The filing also notes that various persons have the right to receive dividends or direct the sale of these shares, but no single person's interest exceeds 5% of the total outstanding shares. The filing was made on October 17, 2025, and includes certifications that the shares were acquired and are held in the ordinary course of business, not for the purpose of influencing control of the issuer.