Orasure Technologies shares rise 1.91% premarket after healthcare entrepreneur Ron Zwanziger threatens adversarial path.

Orasure Technologies, Inc. rose 1.91% in premarket trading, with the company facing pressure from prominent healthcare entrepreneur Ron Zwanziger, who threatened to pursue a more 'adversarial path' if the board continues to resist his offer to buy the medical devices company. Zwanziger's letter, seen by Reuters, indicates growing concern among investors and increased pressure for a deal, which may have contributed to the stock's upward movement.