UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) May 20, 2011

WESTAR ENERGY, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code (785) 575-6300

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

WESTAR ENERGY, INC.

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

We held our 2011 Annual Meeting of Shareholders on May 19, 2011 (the “Annual Meeting’) in Topeka, Kansas. At the Annual Meeting, our shareholders, upon the recommendation of our Board of Directors, approved an amendment to the Westar Energy, Inc. Long Term Incentive and Share Award Plan (the “Plan”). The amendment amended the Plan in the following respects:

This summary of the amendments to the Plan is qualified in its entirety by reference to (1) the full text of the Westar Energy, Inc. Long Term Incentive and Share Award Plan, As Amended and Restated January 1, 2011, which was attached to our definitive Proxy Statement filed with the Securities and Exchange Commission on April 8, 2011 (the “Proxy Statement”), and (2) the modification to the Plan amendment described in the Supplement to the Proxy Statement filed with the Securities and Exchange Commission on May 6, 2011 (the “Proxy Statement Supplement”). A more detailed summary of the Plan, as amended, can be found in the Proxy Statement and Proxy Statement Supplement.

Item 5.07. Submission of Matters to a Vote of Security Holders

The matters that were submitted to our shareholders for approval at the Annual Meeting and the voting results with respect to each matter are set forth below. The proposals related to each matter are described in detail in the Proxy Statement.

Item 1 on the Proxy Card. Our shareholders elected four directors for a three-year term, with the following vote:

Item 2 on the Proxy Card. In an advisory “say on pay” vote, our shareholders approved the compensation of our named executive officers, with the following vote:

Item 3 on the Proxy Card. In an advisory vote, our shareholders approved the option of every one year as the preferred frequency for advisory “say on pay” votes, with the following vote:

In accordance with the results of this advisory vote, we intend to hold future advisory “say on pay” votes annually, until we next hold an advisory vote on the frequency of advisory “say on pay” votes.

Item 4 on the Proxy Card. Our shareholders approved an amendment to the Westar Energy, Inc. Long Term Incentive and Share Award Plan and approved the material terms of the performance goals under the Plan, with the following vote:

Item 5 on the Proxy Card. Our shareholders approved an amendment to our Restated Articles of Incorporation to increase our authorized shares of common stock, with the following vote:

Item 6 on the Proxy Card. Our shareholders voted for the ratification and confirmation of the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for 2011, with the following vote:

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.