Mynd.ai (MYND) shares were down 37% in Monday premarket activity, following Friday's 114.5% gain after the company regained compliance with NYSE American's continued listing requirements.

Zhongchao (ZCMD) stock was down 36%, extending the previous session's 69% decline.

Oculis (OCS) shares were down 32%, adding to the previous session's 23% loss after the company said its OCS-01 eye drops failed to meet the primary endpoint in phase 3 trials in patients with diabetic macular edema.

Aditxt (ADTX) shares were down 30%, extending the previous session's 28.5% decline.

Clearmind Medicine (CMND) stock was down 28%, following the prior session's 46% gain.