X0305 4 2012-05-11 0 0000849547 BLACK BOX CORP BBOX 0001400603 Blakemore Ralph T. 1000 PARK DRIVE LAWRENCE PA 15055 1 1 0 0 President and CEO Common Stock, $.001 par value 2012-05-11 4 F 0 1410 21.92 D 59777 D This number includes three grants of restricted stock units awarded under the Black Box Corporation 2008 Long-Term Incentive Plan. The first grant includes 5,334 restricted stock units which remain unvested. These restricted stock units will vest on 5/26/2012. The second grant includes 5,334 restricted stock units which remain unvested. These restricted stock units will vest on 5/11/2013. The third grant includes 14,350 restricted stock units which remain unvested. 1/3 of these restricted stock units will vest on 5/17/2012, 1/3 will vest on 5/17/2013 and the remaining 1/3 will vest on 5/17/2014. /s/ Ralph T. Blakemore 2012-05-11