Viridian Therapeutics (VRDN) shares were 40% lower pre-bell Monday following a 2.9% loss in the previous session.
Artelo Biosciences (ARTL) stock was down 20%, paring Friday's rally.
Sysco (SYY) shares were 6% lower after the company agreed to acquire Jetro Restaurant Depot in a cash-and-stock deal worth $29.10 billion.