Quantum Cyber N.V. (NASDAQ:QUCY) ("Quantum Cyber" or the "Company"), a Nasdaq-listed autonomous defense technology company assembling an AI-powered System-of-Systems platform for drone warfare, counter-UAS, and border security applications, disclosed today that it has received what the Company views as a blackmail-style threat, delivered by an unsolicited email dated August 14, 2026, from Adam Gefvert, a named defendant in the lawsuit the Company filed on August 10, 2026 in the Supreme Court of the State of New York against White Diamond Research LLC, Mr. Gefvert, and Stocktwits, Inc.