Several biotechnology and pharmaceutical companies posted notable gains in Thursday's after-hours trading session, driven by corporate updates, clinical milestones, and acquisition speculation.China SXT Pharmaceuticals, Inc. (SXTC) climbed 13.6% to $1.42, adding$0.17 after announcing the launch of its Strategic Artificial Intelligence (AI) Insights Initiative. The program is designed to integrate AI-driven analytics into product portfolio planning and market intelligence, reinforcing the company's long-te ...