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: March 21, 2012

(Date of earliest event reported)

APOGEE ENTERPRISES, INC.

(Exact name of registrant as specified in its charter)

Commission File Number: 0-6365

4400 West 78th Street – Suite 520

Minneapolis, Minnesota 55435

(Address of principal executive offices, including zip code)

(952) 835-1874

(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 5.04. Temporary Suspension of Trading Under Registrant’s Employee Benefit Plans.

Apogee Enterprises, Inc. (the “Company”) has elected to change the record keeper for the Apogee Enterprises, Inc. 401(k) Retirement Plan (the “Plan”). As a result of this change, there will be a blackout period in which Plan participants and beneficiaries temporarily will be unable to (i) direct or diversify investments in their individual accounts or (ii) obtain a distribution from the Plan. The blackout period will begin at 3:00 p.m. Central Daylight Time on April 26, 2012, and is expected to end the week of May 6, 2012 (the “Blackout Period”).

The Company received notice of the Blackout Period required by Section 101(i)(2)(E) of the Employee Retirement Income Security Act of 1974 on March 21, 2012.

On March 27, 2012, the Company sent a notice of the Blackout Period (the “Blackout Period Notice”) to the members of its Board of Directors and executive officers pursuant to Section 306 of the Sarbanes-Oxley Act of 2002 and Section 104 of Regulation BTR of the Securities Exchange Act of 1934, informing them that they would be prohibited during the Blackout Period from purchasing and selling shares of the Company’s common stock (including derivative securities pertaining to such shares) that they acquire or have previously acquired in connection with their service or employment as a director or executive officer of the Company.

A copy of the Blackout Period Notice is attached hereto as Exhibit 99.1 and is incorporated herein by reference. During the Blackout Period and for a period of two years after the ending of the Blackout Period, security holders or other interested persons may obtain, without charge, information about the actual beginning and ending dates of the Blackout Period and other information regarding the Blackout Period by contacting Patricia A. Beithon, General Counsel and Secretary, by telephone at (952) 487-7514, or in writing, at Apogee Enterprises, Inc., 4400 West 78th Street, Suite 520, Minneapolis, Minnesota 55435.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

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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.

Date: March 27, 2012

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EXHIBIT INDEX

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