EchoStar (SATS) shares were 63% higher pre-bell Tuesday after AT&T (T) agreed to buy certain wireless spectrum licenses from the company for about $23 billion.
Serina Therapeutics (SER) stock was up 30%, a day after the company said it got a written feedback from the US Food and Drug Administration supporting its clinical trial program for Parkinson's disease.
Offerpad Solutions (OPAD) shares were 25% higher, extending Monday's rally.