DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

3 Months Ended

Dec. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

About Griffon Corporation

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 in connection 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).

Griffon 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.

On February 5, 2026, Griffon announced it entered into a definitive agreement to form a joint venture with ONCAP, the mid-market private equity platform of Onex Corporation (TSX:ONEX), to create a leading global provider of hand tools, home organization solutions, and lawn and garden products for professionals and consumers. The joint venture will combine the United States and Canada businesses of Griffon’s AMES Companies (“AMES”) with the Bellota Tools, Corona, and Burgon & Ball businesses of Venanpri, an ONCAP majority-owned portfolio company. The joint venture will be managed as a subsidiary of Venanpri which, together with other affiliates of ONCAP, will hold a 57% equity interest. Upon closing of the transaction, Griffon will receive consideration of $100,000 in cash, subject to working capital adjustments, will enter into a credit agreement with the joint venture to evidence a $161,100 second-lien loan provided to the joint venture, and will participate in the governance and oversight of the joint venture as a 43% equity holder. Griffon will accrue interest receivable on the second-lien loan through the date of maturity. The joint venture will be financed through committed debt financing, in addition to the second-lien loan provided by Griffon. This transaction is subject to customary closing conditions and, after closing, which is expected to occur by June 2026, Griffon’s interest in the joint venture will be accounted for as an equity method investment. Any gain or loss as the result of this transaction will be determined at closing. Additionally, Griffon announced the initiation of a comprehensive review of strategic alternatives for its AMES Australia operations and AMES United Kingdom operations. As a result of these actions, beginning with Griffon’s second quarter 2026 reporting, AMES’ U.S., Canada, Australia, and U.K. operations, which are currently part of Griffon’s CPP segment, will be reported as discontinued operations. Furthermore, in connection with these actions, we announced that the remaining reporting unit within the CPP segment, the Hunter Fan Company, will be combined with Griffon’s HBP segment.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”) for interim financial information, and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all the information and footnotes required by US GAAP for complete financial statements. As such, they should be read together with Griffon’s Annual Report on Form 10-K for the fiscal year ended September 30, 2025, which provides a more complete explanation of Griffon’s accounting policies, financial position, operating results, business, properties and other matters. In the opinion of management, these financial statements reflect all adjustments considered necessary for a fair statement of interim results. Griffon’s businesses are seasonal; for this and other reasons, the financial results of the Company for any interim period are not necessarily indicative of the results for the full year.

The Condensed Consolidated Balance Sheet information at September 30, 2025 was derived from the audited financial statements included in Griffon’s Annual Report on Form 10-K for the year ended September 30, 2025.

The condensed consolidated financial statements include the accounts of Griffon and all subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation. Certain amounts in prior years may have been reclassified to conform to the current year presentation.

The preparation of financial statements in conformity with US GAAP 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. Significant estimates include expected loss allowances for credit losses and returns, net realizable value of inventories, restructuring reserves, valuation of goodwill and intangible assets, assumptions associated with pension benefit obligations and income or expenses, useful lives associated with depreciation and amortization of intangible and fixed assets, warranty reserves, sales incentive accruals, assumptions associated with stock based compensation valuation, income taxes and tax valuation reserves, environmental reserves, legal reserves, insurance reserves, the valuation of assets and liabilities of discontinued operations and the accompanying disclosures. These estimates are based on management’s best knowledge of current events and actions Griffon may undertake in the future. Actual results may ultimately differ from these estimates.