Apogee Enterprises, Inc.

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangement of Certain Officers (b) On September 10, 2026, Patricia K. Wagner informed the Board of Directors (the “Board”) of Apogee Enterprises, Inc. (the “Company”) that she intends to retire from the Board effective October 2, 2026. Ms. Wagner’s retirement is not as a result of a disagreement with the Company relating to the Company’s current or past operations, policies or practices. (d) On August 5, 2026, the Board elected Messrs. Joseph B. Hayek and Suresh Krishna as directors of the Company. Effective September 11, 2026, Mr. Hayek was appointed to the Nominating and Corporate Governance Committee and Mr. Krishna was appointed to the Compensation Committee. On September 11, 2026, the Board elected Julie K. Streich, age 55, to serve as a Class I director with a term expiring at the Company’s 2029 Annual Meeting of Shareholders and until her successor is duly elected and qualified. The Board also determined that Ms. Streich is independent under the applicable listing standards of The Nasdaq Stock Market LLC and the Company’s director independence standards. The Board also appointed Ms. Streich to the Audit Committee of the Board effective as of September 11, 2026. With the election of Ms. Streich, the Board increased its size from eight to nine directors. Ms. Streich served as Chief Financial Officer of Barnes Group Inc. from 2021 until her retirement in March 2026 and served as Interim Chief Executive Officer from March 2022 to July 2022. Prior to joining Barnes Group, she served as Senior Vice President, Finance Operations for Centrica Plc from March 2019 to July 2020 and as Vice President, Global Planning and Analytics from 2017 to 2019. Earlier in her career, Ms. Streich held several leadership positions with Direct Energy, a U.S.-based subsidiary of Centrica, including Chief Financial Officer of Direct Energy Home from 2016 to 2017, Vice President, Corporate Finance from 2013 to 2016, and Chief Financial Officer, DE Residential from 2012 to 2013. Ms. Streich served on the Board of Directors of Phoenix Energy Technologies from April 2014 to November 2015. Since 2023, she has served on the Board of Directors of Schneider National, Inc., where she currently serves as Chair of the Audit Committee. Ms. Streich earned a Bachelor of Arts degree in Economics and Spanish from Ripon College and an MBA in International Business from the University of Texas at San Antonio. There are no arrangements or understandings between Ms. Streich and any other person pursuant to which Ms. Streich was elected as a director of the Company. There are no transactions involving Ms. Streich that would require disclosure under Item 404(a) of Regulation S-K. Ms. Streich does not have any family relationship with any director or executive officer of the Company or any person nominated or chosen by the Company to become a director or executive officer. As a non-employee director, Ms. Streich will participate in the Company’s non-employee director compensation arrangements in effect during her service. Ms. Streich will receive, on a pro-rated basis for fiscal year 2027, the current annual cash retainer of $75,000 for services as a director. In connection with her election to the Board, Ms. Streich received a time-based restricted stock award of 2,530 shares of the Company’s common stock. The restricted stock award will vest in three equal annual installments on the first three anniversaries of the grant date, subject to the director’s continued service through each vesting date. The closing price of the Company’s common stock on The Nasdaq Stock Market on September 11, 2026 was $37.88. Ms. Streich will also be eligible to participate in the Company’s Deferred Compensation Plan for Non-Employee Directors and Charitable Matching Contributions Program for Non-Employee Directors, each as described under the heading “Non-Employee Director Compensation” in the Company’s proxy statement delivered in connection with the 2026 Annual Meeting of Shareholders as filed with the Securities and Exchange Commission on May 12, 2026.

Item 7.01 Regulation FD Disclosure A copy of the press release announcing the election of Ms. Streich to the Board is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.