X0306 4 2013-01-18 0000054507 WESTAR ENERGY INC /KS WR 0001184813 SOMMA ANTHONY D 818 S KANSAS AVE TOPEKA KS 66612 0 1 0 0 SVP, CFO and Treasurer Common Stock Par Value $5.00 2013-01-18 4 A 0 2450 0 A 31245 D Common Stock Par Value $5.00 2013-01-18 4 F 0 759 28.3055 D 30486 D Vesting of 2,450 performance-based restricted share units that were granted on February 24, 2010, with a vesting date of January 1, 2013. Under the terms of the grant, the number of shares to be received by the Reporting Person at vesting is increased or decreased based on the Issuer's Total Shareholder Return as compared to the Total Shareholder Return for a defined Peer Group of companies for the defined Performance Period. The determination that the performance criteria relating to the grant had been met and the calculation of the number of shares to be distributed were completed on January 18, 2013. Includes 15,330 restricted share units that are subject to forfeiture. Forfeiture of 759 shares for the payment of taxes upon the vesting of 2,450 performance-based restricted share units granted on 2/24/10 and described in this report. Anthony D. Somma 2013-01-18