Material Agreement

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): September 12, 2019 APOGEE ENTERPRISES, INC. (Exact name of registrant as specified in its charter) Minnesota (State or other jurisdiction of incorporation) 0-6365 41-0919654 (Commission File Number) (I.R.S. Employer Identification No.) 4400 West 78th Street – Suite 520, Minneapolis, Minnesota 55435 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code: (952) 835-1874 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: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $0.33 1/3 Par Value APOG The Nasdaq Stock Market LLC Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). ☐ Emerging growth company If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Item 1.01. Entry into a Material Definitive Agreement. On September 12, 2019, Apogee Enterprises, Inc., a Minnesota corporation (the “Company”), and Engaged Capital, LLC and certain of its affiliates (collectively, “Engaged”) entered into an amendment (the “Amendment”) to the previously disclosed confidentiality agreement, dated February 8, 2019, by and among the Company and Engaged, as amended on August 5, 2019 (the “Confidentiality Agreement”). Pursuant to the Amendment, the term of the Confidentiality Agreement has been extended until 11:59 PM New York City time on September 29, 2019. The foregoing description of the Amendment does not purport to be complete and is qualified in its entirety by reference to the Amendment, which is filed herewith as Exhibit 10.1 and is incorporated by reference herein. Item 9.01. Financial Statements and Exhibits. (d) Exhibit. The following exhibit is filed herewith: Exhibit Number Description 10.1 Amendment, dated September 12, 2019, to the Confidentiality Agreement, by and among Apogee Enterprises, Inc., and Engaged Capital LLC, Engaged Capital Flagship Master Fund, LP, Engaged Capital Co-Invest VIII, LP, Engaged Capital Flagship Fund, LP, Engaged Capital Flagship Fund, Ltd., Engaged Capital Holdings, LLC and Glenn W. Welling. 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. Date: September 13, 2019 APOGEE ENTERPRISES, INC. By: /s/ Patricia A. Beithon Patricia A. Beithon General Counsel and Secretary