One big investor walked away just as Gildan prepares its biggest transformation in years.On November 14, Connecticut-based Coliseum Capital Management fully exited its position in Gildan Activewear (GIL 2.65%), reducing exposure by $49.5 million, according to a new SEC filing.What HappenedAccording to a U.S. Securities and Exchange Commission (SEC) filing dated November 14, Coliseum Capital Management reported a complete sale of its stake in Gildan Activewear, amounting to a reduction of about 1 million sha ...