0001437749-13-005817 DEFA14A 1 20130510 20130510 20130510 DREW INDUSTRIES INC 0000763744 3714 133250533 DE 1231 DEFA14A 34 001-13646 13834636 200 MAMARONECK AVE WHITE PLAINS NY 10601 9144289098 200 MAMARONECK AVE WHITE PLAINS NY 10601 DEFA14A 1 drew_defa14a-051013.htm DEFINITIVE ADDITIONAL MATERIALS