Apogee Enterprises, Inc.

Item 2.01 Completion of Acquisition or Disposition of Assets. On September 18, 2026, Apogee Enterprises, Inc. (the “Company”) completed the transaction contemplated by the Share Purchase Agreement, dated September 2, 2026 (the “Purchase Agreement”), pursuant to which Tiger MergeCo SIA, a wholly owned subsidiary of the Company, acquired all of the outstanding equity interests of SIA “Alzette” a Latvian limited liability company, and its subsidiaries, including GroGlass. Pursuant to the terms and conditions of the Purchase Agreement, the Transaction values GroGlass at approximately €62.5 million on a cash-free, debt-free basis; the final purchase price remains subject to the adjustments set forth in the Purchase Agreement and includes contingent consideration that may become payable following closing based upon the achievement of specified financial performance targets during the three-year period following closing. The maximum contingent consideration payable pursuant to the earnout provisions is €10 million. The Company funded the acquisition using available cash and borrowings under its existing revolving credit facility. This report supplements the Company’s announcement of the transaction, which was described in the Company’s Current Report on Form 8-K filed on September 3, 2026 with the U.S. Securities and Exchange Commission (the “SEC”). The foregoing description of the Purchase Agreement and the transactions contemplated thereby does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Purchase Agreement, a copy of which was filed with the SEC as Exhibit 2.1 to the Company’s Current Report on Form 8-K filed on September 3, 2026 and is incorporated into this Item 2.01 by reference.

Item 7.01 Regulation FD Disclosure. On September 18, 2026, the Company issued a press release announcing the completion of the acquisition described in Item 2.01, a copy of which is filed as Exhibit 99.1 and incorporated into this Item 7.01 by reference. The information furnished pursuant to this Item 7.01, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities under that section, and shall not be deemed to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated therein by reference.