Marcato Capital has 21 activist campaigns under its belt, including two director election battles and seven public letters to boards and management teams since McGuire formed his fund in 2010 after leaving activist Bill Ackman 's Pershing Square Capital Management. McGuire is in the midst of a heated director-election contest at wing and beer restaurant chain Buffalo Wild Wings ( BWLD ), which is set to come up for a vote on June 2.