The Wilson Group LLC was honored Thursday night as the fastest-growing private company in southwestern Pennsylvania, topping the 2015 Pittsburgh 100 with a 644 percent growth rate between 2012 and 2014. The Wilson Group, which is based at 801 Vinial St. in Pittsburgh, is a provider of office equipment. Derrick Wilson, a former vice president at AMCOM/Xerox, started the company in July 2012 with three employees. It has grown by leaps and bounds ever since. Wilson accepted the award during a ceremony...