RedHat

In 1993 Bob Young incorporated the ACC Corporation, a catalog business that sold Linux and UNIX software accessories. Then in 1994 Marc Ewing created his own version of Linux, which he named Red Hat Linux. Ewing released it in October, and it became known as the Halloween release. Young bought Ewing's business in 1995, and the two merged to become Red Hat Software with Young serving as CEO.
Red Hat went public on August 11, 1999, the eighth-biggest first-day gain in Wall Street history. Matthew Szulik succeeded Bob Young as CEO in November of that year.
Website http://www.redhat.com