X0306 4 2021-02-20 0 0000932696 INSIGHT ENTERPRISES INC NSIT 0001771398 Mullen Joyce A 6820 SOUTH HARL AVENUE TEMPE AZ 85283 0 1 0 0 President, North America Restricted Stock Units 2021-02-20 4 A 0 4787 0.00 A Common Stock 4787 4787 D Restricted Stock Units 2021-02-20 4 A 0 7180 0.00 A Common Stock 7180 2513 D Each restricted stock unit represents a contingent right to receive one share of Common Stock of Insight Enterprises, Inc. The restricted stock units were granted on February 20, 2021 with vesting to occur in four equal annual installments beginning February 20, 2022. The number of restricted stock units increases or decreases with the Company's performance against specific objectives defined in advance of the grant date, and the restricted stock units will vest in three equal annual installments beginning February 20, 2022. Lisanne Steinheiser, by Power of Attorney, for Joyce A. Mullen 2021-02-23