SpaceX is taking a commanding role in the rocket business — but Gwynne Shotwell, the company’s president and chief operating officer, expects the satellite business to be more lucrative.

Shotwell sized up SpaceX’s road ahead in a CNBC interview that aired today in connection with the cable network’s latest Disruptor 50 list. For the second year in a row, the space venture founded by billionaire Elon Musk leads the list.