Several small- and mid-cap biotech and medical stocks saw notable after-hours price action on Friday, September 26, following a mix of clinical updates, investor presentations, and strategic announcements.Enanta Pharmaceuticals Inc. (ENTA) surged sharply in after-hours trading on Friday, September 26, following a modest gain during the regular session. The stock closed the day at $7.90, up 1.94%, before vaulting another 20% after hours to reach $9.48. This dramatic post-close rally was driven by investor r ...