08:06 AM EDT, 09/09/2025 (MT Newswires) -- Mixed Martial Arts Group ( MMA ) shares jumped 160% in Tuesday's premarket session after the company named Donald Trump Jr. as its strategic advisor.

The company said Trump Jr. will provide strategic counsel to its board and management team.

Trading volume was approximately 1 million shares pre-bell, compared with the average daily volume of about 700,000.