Protagonist Therapeutics: Small Biotech Skyrockets on Buyout Buzz & Breakthrough Trials
Protagonist Therapeutics shares surged over 30% to nearly $89 on October 10, 2025, after reports that Johnson & Johnson is in talks to acquire the company. Trading was briefly halted due to volatility. The company, valued at about $5.4 billion, recently announced positive trial results for its lead drugs and secured major partnerships with J&J and Takeda.
