Ingevity (NGVT) shares soared 12% in the last trading session to close at $37.04. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 9.6% loss over the past four weeks. NGVT's gain appears to reflect a recovery in its shares from the recent slump following its announcement of the CEO transition. NGVT, last Thursday, announced the departure of John Fortson as president and CEO and from the board of directors of the company, effective ...