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):

November 29, 2012

LINDSAY CORPORATION

(Exact name of registrant as specified in its charter)

(402) 829-6800

(Registrant’s telephone number, including area code)

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:

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

On November 29, 2012, Lindsay Corporation (the “Company”) entered into an Eighth Amendment (the “Amendment”) to the Employment Agreement (the “Agreement”) between the Company and Richard W. Parod, President and Chief Executive Officer of the Company. This Amendment extended the term of the Agreement for two additional years so that the term shall continue in effect until April 5, 2015. A copy of the Amendment is filed as Exhibit 10.1 hereto.

Also, on November 29, 2012, the Compensation Committee of the Board of Directors (the “Committee”) of the Company adopted the Management Incentive Plan for the Company’s fiscal year ending August 31, 2013 (“2013 MIP”) under which the Company’s senior officers can earn annual cash incentive awards. Each current employee who will be a named executive officer in the Company’s proxy statement for its 2013 annual meeting is a participant in the 2013 MIP. The 2013 MIP was adopted pursuant to and is subject to the terms of the Management Incentive Umbrella Plan approved by stockholders on January 26, 2009.

The 2013 MIP establishes target bonus amounts for each participating officer ranging from 30% to 75% of such officer’s base salary. Participants are eligible for awards of between 0% and 200% of their target bonus depending on the achievement of certain Company financial performance criteria and individual performance criteria. The Company financial performance component and individual performance component are weighted as 80% and 20% of the overall performance criteria for each participant, respectively. The Company financial performance component is based on achieving stated goals for fiscal 2013 revenue, operating margin and average working capital to sales, with target bonuses for these subcomponents keyed to the Company’s fiscal 2013 operating budget. For certain officers, the Company financial performance component also includes additional subcomponents relating to a specific market segment or operational area over which those officers have direct responsibility or control. The amount of bonus awarded under the individual performance component is dependent upon an officer’s personal performance as evaluated using individual performance objectives established by the Committee for each participating officer.

Item 9.01. Financial Statements and Exhibits

SIGNATURES

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