Psyence Biomedical (PBM) shares were 87% higher pre-bell Monday, rebounding from Friday's slide.
Steelcase (SCS) was up 40% after the company agreed to a $2.2 billion takeover by HNI (HNI).
CommScope (COMM) shares were 73% higher after it reported higher Q2 adjusted earnings and revenue and after Amphenol (APH) said it agreed to buy CommScope's CCS business for $10.5 billion in cash
Gyrodyne (GYRO) stock was up 41%, adding to Friday's gains.