U.S. after-hours trading on Wednesday saw a wave of gains across several small-cap and micro-cap biotech names, with a mix of catalyst-driven moves and sentiment-based rebounds. While a few companies advanced on upcoming clinical milestones or recent data presentations, others climbed despite having no new corporate developments, reflecting renewed interest in high-volatility biotech names during extended trading.Below are the notable after-hours gainers:Agape ATP Corp. (ATPC) — Up 29.41% After HoursAfter ...