Business Description

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of business Griffon Corporation (the “Company,” “Griffon,” "we" or "us") is a diversified management and holding company that conducts business through wholly-owned subsidiaries. Griffon oversees the operations of its subsidiaries, allocates resources among them and manages their capital structures. Griffon provides direction and assistance to its subsidiaries with acquisition and growth opportunities as well as divestitures. As long-term investors, we intend to continue to grow and strengthen our existing businesses, and to diversify further through investments in our businesses and acquisitions. The Company was founded in 1959, is a Delaware corporation headquartered in New York, N.Y. and is listed on the New York Stock Exchange (NYSE:GFF). On July 1, 2024, Griffon announced that its subsidiary, The AMES Companies, Inc., ("AMES") expanded the scope of its Australian operations by acquiring substantially all the assets of Pope, a leading Australian provider of residential watering products, from The Toro Company (NYSE:TTC) for a purchase price of approximately AUD 21,800 (approximately $14,500) in cash. This is CPP's seventh acquisition in Australia since 2013, and further expands AMES's product portfolio in the Australian market. Griffon announced in May 2023 that CPP was expanding its global sourcing strategy to include long handled tools, material handling, and wood storage and organization product lines for the U.S. market. This initiative was successfully completed as of September 30, 2024. Refer to Note 10 - Restructuring Charges for additional information. Griffon currently conducts its operations through two reportable segments: • Home and Building Products ("HBP") conducts its operations through Clopay Corporation ("Clopay"). Founded in 1964, Clopay is the largest manufacturer and marketer of garage doors and rolling steel doors in North America. Residential and commercial sectional garage doors are sold through professional dealers and leading home center retail chains throughout North America under the brands Clopay, Ideal, and Holmes. Rolling steel door and grille products designed for commercial, industrial, institutional, and retail use are sold under the Clopay, Cornell and Cookson brands. • Consumer and Professional Products (“CPP”) is a global provider of branded consumer and professional tools; residential, industrial and commercial fans; home storage and organization products; and products that enhance indoor and outdoor lifestyles. CPP sells products globally through a portfolio of leading brands including AMES, since 1774, Hunter, since 1886, True Temper, and ClosetMaid. Consolidation The consolidated financial statements include the accounts of Griffon and all subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation. The results of operations of acquired businesses are included from the dates of acquisitions. Discontinued operations As of September 30, 2025 and 2024, assets and liabilities of discontinued operations primarily consisted of insurance claims, product liability, warranty and environmental reserves. There was no reported revenue for the years ended September 30, 2025, 2024 and 2023 related to discontinued operations. See Note 8 - Discontinued Operations for additional information. Reclassifications Certain amounts in prior years have been reclassified to conform to the current year presentation. Use of estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. These estimates may be adjusted due to changes in economic, industry or customer financial conditions, as well as changes in technology or demand.…