Executive Change

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 26, 2026 APOGEE ENTERPRISES, INC. (Exact name of registrant as specified in its charter) Minnesota 0-6365 41-0919654 (State or other jurisdiction of incorporation) (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 Exchange 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 Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (Section 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (Section 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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangement of Certain Officers (b) On May 26, 2026, Brent C. Jewell tendered his resignation as President of the Architectural Glass Segment of Apogee Enterprises, Inc. (the “Company”). His last day with the Company will be June 10, 2026. Mr. Jewell’s resignation is unrelated to the transaction announced by the Company on May 28, 2026 and was not the result of any disagreement with the Company on any matter relating to its operations, policies or practices. The timing of this disclosure reflects the Company’s reporting obligations only and should not be interpreted as indicating any relationship between the leadership transition and the transaction. Mr. Jewell is expected to continue to support the Company, including with respect to transition, pre-closing and integration activities related to the transaction, through his final date of employment. Item 9.01 Financial Statements and Exhibits. 104 Cover Page interactive Data file (embedded within the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized. APOGEE ENTERPRISES, INC. By: /s/Bryan A. Welp Bryan A. Welp Vice President, General Counsel and Secretary Date: May, 29, 2026