Cyclerion Therapeutics stock jumps in premarket after Medsteer deal — what CYCN investors watch next
Cyclerion Therapeutics shares surged 46% to $2.01 premarket Tuesday after announcing an expanded exclusive collaboration with Medsteer for its CYC-126 depression program. The company aims to start a Phase 2 proof-of-concept study in late 2026, with initial data expected in 2027. Cyclerion flagged “substantial doubt” about its ability to continue as a going concern and said it needs more funding.