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 earliest event reported: June 14, 2013

PetSmart, Inc.

(Exact Name of Registrant as Specified in Charter)

19601 North 27^th Avenue, Phoenix, Arizona 85027

(Address of Principal Executive Offices) (Zip Code)

(623) 580-6100

(Registrant’s telephone number, including area code)

N/A

(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 (see General Instruction A.2. below):

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensation Arrangement for Certain Officers.

Amended and Restated Executive Short-Term Incentive Plan

On June 14, 2013, PetSmart, Inc. (“PetSmart” or the “Company”) held its 2013 Annual Meeting of Stockholders (the “2013 Annual Meeting”), at which the Company’s stockholders approved the PetSmart Amended and Restated Executive Short-Term Incentive Plan (the “ESTIP”).

The purpose of the ESTIP is to enhance PetSmart’s ability to promote its success by providing incentives and rewards for the contributions of participants towards the successful achievement of our financial and business goals. The ESTIP is structured to pay cash bonuses as well as bonuses in the form of PetSmart common stock, or a combination of the foregoing.

The ESTIP is administered by the Compensation Committee of the Board of Directors. The ESTIP will remain effective until it is suspended or terminated by the Compensation Committee or the Board of Directors. The Compensation Committee or the Board of Directors may amend, suspend, discontinue or terminate the ESTIP at any time and for any reason.

Our executive officers and other key employees are eligible to participate in the ESTIP. At the beginning of each performance period, the Compensation Committee designates which eligible employees will participate in the ESTIP for such performance period. The participants in the ESTIP will not participate in our regular short-term incentive plan.

Under the ESTIP, the Compensation Committee establishes and approves target award amounts for each participant for each performance period. Typically a performance period will be a fiscal year. Individual participants may earn an award payout ranging from zero percent to a maximum of five hundred percent of their target award not to exceed $10 million for any twelve month period. The Compensation Committee will also establish performance objectives for the performance period based on the business criteria discussed below. Actual performance relative to those objectives determines to what extent the target award amount is paid for such performance period.

The ESTIP sets forth a number of business criteria, any one or more of which may be selected by the Compensation Committee as the basis for determining incentive compensation under the ESTIP that may become payable to a participant for a particular fiscal year. The criteria are:

Following the close of each performance period, the Compensation Committee will determine whether the established performance metrics were achieved and determine what amount will be paid to each participant.

The description of the ESTIP contained in this report is qualified in its entirety by reference to the full text of the ESTIP, which was filed as Appendix A to PetSmart’s Definitive Proxy Statement filed with the SEC on May 3, 2013, and is incorporated herein by reference.

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

The 2013 Annual Meeting of Stockholders of PetSmart, Inc. was held on June 14, 2013. The matters that were voted on at the meeting, and the final voting results as to each such matter, are set forth below.

To be elected as a director in an uncontested election, a nominee must receive the affirmative vote of a majority of the votes cast with respect to such nominee. All eight of the nominees for election as directors at the 2013 Annual Meeting were elected by the stockholders, as follows:

The stockholders ratified the appointment of Deloitte & Touche LLP as our independent registered accounting firm for the 2013 fiscal year, as follows:

The stockholders approved the ESTIP, as follows:

The stockholders approved, by non-binding advisory vote, our executive compensation, as follows:

Item 9.01 Financial Statements and Exhibits

SIGNATURES

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.

Index to Exhibits