HCWB ▲ +3.5% - HCW Biologics Inc. $HCWB - HCW Biologics Strengthens U.S. Patent Estate for Its Lead Clinical-Stage Immunotherapeutic HCW9302 as Alopecia Areata Treatment HCW Biologics rose 3.5% today after the company announced it had strengthened its U.S. patent protections for HCW9302, its lead clinical-stage immunotherapy candidate being developed to treat alopecia areata. The expanded patent estate could extend the company's exclusivity period for the treatment, providing longer-term competitive protection if the drug advances through clinical trials and reaches commercialization. 02-SEP-2026 09:00 AM ET