Ryan Dezember

Thasos is at the vanguard of companies trying to help traders get ahead of stock moves like that using so-called alternative data. Such suppliers might examine mine slag heaps from outer space, analyze credit-card spending data or sort through construction permits. Thasos’s specialty is spewing out of your smartphone. “It’s creating this data all the time, even if it’s not ringing,” said Greg Skibiski, Thasos’s 45-year-old founder and chief executive. “It’s a beacon.