SAN FRANCISCO--(BUSINESS WIRE)--National shareholder rights law firm Hagens Berman has opened an investigation into ALT5 Sigma Corporation (NASDAQ: ALTS) following a cascade of regulatory and management failures that led to the company's stock cratering nearly 80%. Finally, on November 28, 2025, ALT5 disclosed that its outside auditor resigned the same day the company fired CFO Hugh. By August 29, 2025, just weeks after closing a $1.5 billion offering, ALT5 revealed that "on May 7, 2025, the Intermediate Co ...