KRSA ▼ -7.4% - Korsana Biosciences, Inc. $KRSA - Korsana Biosciences Completes Closing of Merger with Cyclerion Therapeutics and Previously Announced Private Placement of $380 Million Korsana Biosciences completed its merger with Cyclerion Therapeutics and closed a $380 million private placement, yet shares fell 7.4% today. The decline may reflect dilution concerns from the capital raise or disappointment in deal terms relative to market expectations. 08-SEP-2026 04:05 PM ET