X0306 4/A 2015-05-14 2015-05-18 0 0000929452 KNIGHT TRANSPORTATION INC KNX 0001187342 KNIGHT KEVIN P 20002 NORTH 19TH AVENUE PHOENIX AZ 85027 1 1 0 0 Executive Chairman Restricted Stock Units 2015-05-14 4 A 0 50201 0 A Common Stock 50201 50201 D Each restricted stock unit represents a contingent right to receive one share of Knight Transportation, Inc. common stock, subject to adjustment based on certain performance targets over a performance period ending on December 31, 2017. The number of derivative securities is subject to adjustment based on the level of achievement for specified performance targets measured over the performance period ending on December 31, 2017. The shares earned under this award will vest on January 31, 2019. /s/ Kevin P. Knight 2015-05-19