World Renowned Law Firm Grant & Eisenhofer Files Class Action Lawsuit Against Canadian Banks CIBC and RBC Alleging Illegal Stock Market Manipulation of Quantum BioPharma Shares

TORONTO, Dec. 19, 2025 (GLOBE NEWSWIRE) -- Quantum BioPharma Ltd. (NASDAQ: QNTM) (CSE: QNTM) (FRA: 0K91) (“Quantum BioPharma”), understands that Quantum BioPharma shareholder Paul Durkacz has filed a class action lawsuit alleging that investors in Quantum BioPharma were the victims of stock manipulation. The suit alleges that between January 6, 2021, and October 15, 2025, shareholders who sold securities of Quantum Biopharma Ltd., formerly known as FSD Pharma Inc., were significantly and materially harmed.