Billionaire Elon Musk-led SpaceX's rival AST SpaceMobile's stock price has skyrocketed 1,300% from $2 to $28 in just six months. AST, which went public in April 2021, entered into partnerships with AT&T and Verizon, sending the satellite designer and manufacturer's stock price flying. AST is set to launch its first five commercial satellites into low-earth orbit aboard a SpaceX rocket.