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Once a year, publicly traded companies issue a comprehensive report of their business, called a 10-K. A component mandated in the 10-K is the ‘Risk Factors’ section, where companies disclose any major potential risks that they may face. This dashboard highlights all major changes and additions in new 10K reports, allowing investors to quickly identify new potential risks and opportunities.

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Risk Factors - GFF

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Item 1A. Risk Factors

Griffon’s business, financial condition, operating results and cash flows can be impacted by a number of factors which could cause Griffon’s actual results to vary materially from recent or anticipated future results. The risk factors discussed in this section should be carefully considered with all of the information in this Annual Report on Form 10-K. These risk factors should not be considered the only risk factors facing Griffon. Additional risks and uncertainties not presently known or that are currently deemed immaterial may also materially impact Griffon’s business, financial condition, operating results and cash flows in the future.

In general, Griffon is subject to the same general risks and uncertainties that impact other diverse manufacturing companies including, but not limited to, general economic, industry and/or market conditions and growth rates; impact of natural disasters and pandemics, and their effect on global markets; possible future terrorist threats and their effect on the worldwide economy; and changes in laws or accounting rules. Griffon has identified the following specific risks and uncertainties that it believes have the potential to materially affect its business and financial condition.

Risks Related to Our Business

Current worldwide economic uncertainty and market volatility could adversely affect Griffon’s businesses.

The current worldwide economic uncertainty and market volatility could continue to have an adverse effect on Griffon during 2026, within both the HBP and CPP segments, which are linked to the U.S. housing and the commercial property markets, and the U.S. economy in general. Purchases of many HBP and CPP products are discretionary for consumers who are generally more willing to purchase products during periods in which favorable macroeconomic conditions prevail. These conditions could make it more difficult to obtain additional credit on favorable terms for investments in current businesses or for acquisitions, or could render financing unavailable; in addition, while we do not have any material debt maturities prior to 2028, if these conditions persist, we may have difficulty refinancing our debt before it comes due. Griffon is also exposed to certain fundamental economic risks including a decrease in the demand for the products and services it offers or a higher likelihood of default on its receivables.

Adverse trends and general economic conditions, especially those that relate to construction and renovation, will impact Griffon’s business.

The HBP and CPP businesses serve residential and commercial construction and renovation, and are influenced by market conditions that affect these industries. For the year ended September 30, 2025, approximately 63% and 37% of Griffon’s consolidated revenue was derived from the HBP and CPP segments, respectively, which were dependent on renovation of existing homes, new home construction, and commercial non-residential construction, repair and replacement. The strength of the U.S. economy, the age of existing home stock, job growth, interest rates, consumer confidence and the availability of consumer credit, as well as demographic factors such as migration into the U.S. and migration of the population within the U.S., have an effect on HBP and CPP. To the extent market conditions for residential or commercial construction and renovation are weaker than expected, this will likely have an adverse impact on the performance and financial results of the HBP and CPP businesses.

Griffon is exposed to fluctuations in inflation, which could negatively affect its business, financial condition and results of operations.

U.S. annual inflation rose to approximately 9.1% in 2022, its highest level in about 40 years, and has since moderated to the low‑to‑mid 2% range, according to the U.S. Department of Labor data and projections from the Social Security Administration. Increases in interest rates, especially if coupled with reduced government spending and volatility in financial markets, may have the effect of further increasing economic uncertainty and heightening these risks, which may result in economic recession. As a result of fluctuations in inflation, we may seek to increase the sales prices of our products and services in order to maintain satisfactory margins. Any attempts to offset Griffon’s cost increases with price increases may result in reduced sales, increased customer dissatisfaction or reputational harm. Additionally, Griffon’s operating companies may be unable to raise the prices of their products and services at or above the rate at which their costs increase, which may reduce operating margins and have a material adverse effect on financial results and future growth.

Griffon operates in highly competitive industries and may be unable to compete effectively.

Griffon’s operating companies face intense competition in the markets they serve. Griffon competes primarily on the basis of technical expertise, product differentiation, quality of products and services, and price. There are a number of competitors to Griffon, some of which are larger and have greater resources than Griffon’s operating companies. Griffon's operating companies may face additional competition from companies that operate in countries with significantly lower operating costs.

Many HBP and CPP customers are large mass merchandisers, such as home centers, warehouse clubs, discount stores, commercial distributors and e-commerce companies. The growing share of the market represented by these large mass merchandisers, together with changes in consumer shopping patterns, have contributed to the increase of multi-category retailers and e-commerce companies that have strong negotiating power with suppliers. Many of these retailers import products directly from suppliers based in low-cost countries to source and sell products under their own private label brands to compete with HBP and CPP products and brands, which increases pricing pressure on our products. The loss of, or a failure by, one of HBP’s or CPP’s significant customers could adversely impact our sales and operating cash flows.

To address all of these challenges, HBP and CPP must be able to respond to these competitive pressures, and the failure to respond effectively could result in a loss of sales, reduced profitability and a limited ability to recover cost increases through price increases. In addition, there can be no assurance that Griffon will not encounter increased competition in the future, which could have a material adverse effect on Griffon’s financial results.

The loss of large customers can harm financial results.

A small number of customers account for, and are expected to continue to account for, a substantial portion of Griffon’s consolidated revenue. Home Depot and Menards are significant customers of HBP and Home Depot, Lowe’s and Bunnings are significant customers of CPP. Orders from these customers are subject to fluctuation and may be reduced materially due to changes in customer needs or other factors. Any reduction or delay in sales of products to one or more of these customers could significantly reduce Griffon’s revenue. Griffon cannot ensure that its largest customers will be retained or that additional key customers will be recruited. Also, both HBP and CPP extend credit to its customers, which exposes Griffon to credit risk. If this customer were to become insolvent or otherwise unable to pay its debts, the financial condition, results of operations and cash flows of HBP, CPP and Griffon could be adversely affected.

Reliance on third party suppliers and manufacturers may impair the ability of HBP and CPP to meet their customer demands.

HBP and CPP rely on a limited number of companies globally to supply components and manufacture certain of their products. The percentage of HBP and CPP worldwide sourced finished goods as a percent of revenue approximated 6% and 38%, respectively, in 2025. The percentage of HBP and CPP's worldwide sourced components as a percent of cost of goods sold approximated 18% and 3%, respectively, in 2025. Reliance on third party suppliers and manufacturers may reduce control over the timing of deliveries and quality of both HBP and CPP products. Reduced product quality or failure to deliver products timely may jeopardize relationships with certain of HBP's and CPP's key customers. In addition, reliance on third party suppliers or manufacturers may result in the failure to meet HBP and CPP customer demands. Continued turbulence in the worldwide economy may affect the liquidity and financial condition of HBP and CPP suppliers. Should any of these parties fail to manufacture sufficient supply, go out of business or discontinue a particular component, alternative suppliers may not be found in a timely manner, if at all. Such events may impact the ability of HBP and CPP to fill orders, which could have a material adverse effect on customer relationships. Finally, the recent expansion by CPP of its global sourcing strategy to include various product lines for the U.S. market has increased CPP’s reliance on third-party suppliers and, accordingly, CPP’s exposure to the risks relating to the use of third-party suppliers.

If Griffon is unable to obtain raw materials for products at favorable prices it could adversely impact operating performance.

HBP and CPP suppliers primarily provide resin, wood, steel and wire rod. Both of these businesses could experience shortages of raw materials or components for products or be forced to seek alternative sources of supply. If temporary shortages due to disruptions in supply caused by weather, transportation, production delays or other factors require raw materials to be secured from sources other than current suppliers, the terms may not be as favorable as current terms or certain materials may not be available at all. In recent years, both HBP and CPP have experienced price increases for most of their raw materials.

While most key raw materials used in Griffon’s businesses are generally available from numerous sources, raw materials are subject to price fluctuations. Because raw materials in the aggregate constitute a significant component of the cost of goods sold, price fluctuations could have a material adverse effect on Griffon’s results of operations. Griffon’s ability to pass raw material price increases to customers is limited due to supply arrangements and competitive pricing pressure, and there is generally a time lag between increased raw material costs and implementation of corresponding price increases for Griffon’s products. In particular, sharp increases in raw material prices are more difficult to pass through to customers and may negatively affect short-term financial performance.

CPP is subject to risks from sourcing from international locations, especially China

CPP's business is global, with products and raw materials sourced from, and manufactured and sold, in multiple countries around the world. There are risks associated with conducting a business that may be impacted by political and other developments associated with international trade. In this regard, certain products sold by CPP in the United States and elsewhere are currently sourced from suppliers in China, with some of these products sourced exclusively from suppliers in

China. Through the expanded sourcing strategy and the closure of U.S. facilities, CPP has increased its reliance on suppliers in China, which could exacerbate the impact of tariffs. While CPP has established certain suppliers outside of China and is in the process of developing additional suppliers outside of China, and has increased sourcing from several other countries in an effort to minimize the risks associated with sourcing from China, various tariff actions taken since January 2025 by the U.S. government relating to imports from other countries may increase the costs of shifting CPP’s supply chain away from China. Uncertainties regarding the future of these tariffs may cause CPP to delay, postpone, or modify some of its supply chain sourcing changes, and may thereby impact CPP’s ability to realize the full benefits of its expanded sourcing strategy.

China does not have a well-developed, consolidated body of laws governing agreements with international customers. Enforcement of existing laws or contracts based on existing law may be uncertain and sporadic, and it may be difficult to obtain swift and equitable enforcement or to obtain enforcement of a judgment by a court of another jurisdiction, including other jurisdictions within China itself. The relatively limited Chinese judicial precedent on matters of international trade in many cases creates additional uncertainty as to the outcome of any litigation. In addition, interpretation of statutes and regulations in China may be subject to government policies or political changes.

Because of the volume of sourcing by CPP from international locations, trade actions by the U.S. government since January 2025, as well as future trade actions, represent a continuing risk to CPP’s revenue and operating performance. U.S. imports from China are projected to reach $439 billion in 2025. The majority of these imports were already subject to the tariffs imposed on Chinese imports since March 2018 under Section 301 of the Trade Act of 1974, as amended. In January 2025, the U.S. issued the “America First Trade Policy,” pursuant to which the administration commenced a broad range of trade investigations that have resulted in the imposition of a series of significant tariffs on products from many countries around the world. These actions aim to address national security, migration and trade imbalances, but have triggered significant global trade tensions and numerous legal challenges. Since their implementation, many of these tariffs have been paused, expanded, increased, reduced, or rolled back, in some cases multiple times, and several additional tariffs have been added, increasing the overall scope of products covered. The volatile nature of these tariff actions creates significant uncertainty about the financial and operational impact on CPP’s operating and financial performance and may hinder the ability of CPP to develop and implement sustainable tariff mitigation strategies. Additionally, the U.S. government has announced an enhanced focus on aggressive customs enforcement, including through the creation of a Trade Fraud Task Force, a cross-agency initiative of the U.S. Departments of Justice and Homeland Security aimed at combatting trade fraud, tariff evasion, and customs violations. Compliance with evolving trade regulations in light of this heightened enforcement paradigm has increased administrative complexity and costs, and the failure to adapt quickly and effectively to these changes could materially and adversely affect CPP’s business.

In addition to tariffs, an increased global focus on forced labor in supply chains continues to have the potential to impact our business operations. In June 2022, the Uyghur Forced Labor Prevention Act (UFLPA) went into effect and establishes a rebuttable presumption that goods made in whole or in part in the Xinjiang Uyghur Autonomous Region of the People’s Republic of China are produced with forced labor, and directs U.S. Customs and Border Protection (CBP) to prevent entry of products made with forced labor into the U.S. market. Importers whose shipments are detained by CBP under the UFLPA can rebut the presumption with “clear and convincing evidence” that the products were not produced with forced labor. This requires that the importer submit detailed information regarding every supplier and sub-supplier, and all components and raw materials, relating to the manufacturing and transportation of goods being detained. Detention costs accrue during the pendency of CBP's evaluation.

From October 1, 2024 through September 30, 2025, more than 6,900 shipments to U.S importers were targeted by CBP for further inspection, compared to approximately 4,200 shipments in the prior year. Neither CPP nor its suppliers currently manufacture or source products, components or raw materials from the Uyghur region of China; however, CBP takes a broad approach when targeting shipments it believes may have originated from the Uyghur region based on product definitions, tariff codes and supplier names that lead them to suspect the goods come from the Uyghur region.

As a result, CPP shipments may be targeted for detention in which case they become subject to the rebuttable presumption that they were sourced from the Uyghur region or another high-risk country, even though they are not imported directly from China or are otherwise demonstrably outside the scope of the UFLPA. In view of the increased enforcement of forced labor initiatives, we are continuing to update our compliance measures and work with our supply base to validate their supply chains, from raw

materials through components to finished goods, to ensure our goods are not made using forced labor. We cannot be certain that our products will not be targeted or that our shipments will not be detained, which may impact our operating performance.

HBP and CPP operations are also subject to the effects of international trade agreements and regulations such as the United States-Mexico-Canada Agreement (USMCA), which will undergo a mandatory six-year review in 2026, and the activities and regulations of the World Trade Organization. Although these trade agreements generally have positive effects on trade liberalization, sourcing flexibility and the cost of goods by reducing or eliminating the duties and/or quotas assessed on products manufactured in a particular country, trade agreements can also adversely affect HBP and CPP. For example, trade agreements can result in setting quotas on products that may be imported from a particular country into key markets including the U.S., Canada, Australia and the U.K., or may make it easier for other companies to compete by eliminating restrictions on products from countries in which HBP and CPP competitors source products. With the expansion of its global sourcing strategy and the closure of numerous U.S. manufacturing locations, CPP is likely to experience a diminished ability to take advantage of the trade benefits of the USMCA.

The ability of HBP and CPP to import products in a timely and cost-effective manner may continue to be affected by conditions at ports or issues that otherwise affect transportation and warehousing providers, such as port and shipping capacity, fuel prices, labor disputes, severe weather or increased homeland security requirements in the U.S. and other countries, as well as the potential for increased costs due to currency exchange fluctuations. Changes in U.S. trade policy, including new tariffs and vessel fees for Chinese-built ships, as well as tariff-driven inventory surges, can disrupt international shipping, complicate import planning, and may result in delivery delays and increased costs, which could have an adverse impact on the business and financial results of HBP and CPP.

A future pandemic could adversely impact our results of operations.

In such event, the extent and duration of any impact on our businesses would be difficult to predict. To the extent a new outbreak adversely affects our businesses, operations, financial condition and operating results, it may also have the effect of heightening many of the other risks factors such as those relating to our high level of indebtedness, our need to generate sufficient cash flows to service our indebtedness, and our ability to comply with the covenants contained in the agreements that govern our indebtedness, as described in more detail below.

Griffon’s businesses are subject to seasonal variations and the impact of uncertain weather patterns.

HBP’s business is driven by renovation and construction during warm weather, which is historically at reduced levels during the winter months, generally in our second quarter. In 2025, 49% of CPP's sales occurred during the second and third quarters compared to 52% in 2024 and 54% in 2023.

Demand for lawn and garden products is influenced by weather, particularly weekend weather during the peak gardening season. AMES' sales volumes could be adversely affected by certain weather patterns such as unseasonably cool or warm temperatures, hurricanes, water shortages or floods. In addition, lack of snow or lower than average snowfall during the winter season may result in reduced sales of certain AMES' products such as snow shovels and other snow tools. As global temperatures have warmed as a result of climate change, average snowfall levels in the United States and Canada have decreased and are expected to continue to decrease; this has resulted, and will likely continue to result, in reduced sales of snow shovels and other snow tools.

We rely on IT systems, networks and services to conduct our business, including communicating with employees and our key commercial customers, ordering and managing materials and products from suppliers, shipping products to customers and analyzing and reporting results of operations. While we have taken steps to ensure the security of our information technology systems, our systems may nevertheless be vulnerable to computer viruses, security breaches and other disruptions from unauthorized users. Cyber criminals are becoming more sophisticated and knowledgeable every day, and as their tactics evolve, it is a constant challenge to ensure that our IT security practices are sufficient to protect our IT systems and data. If our IT systems are damaged or cease to function properly for an extended period of time, whether as a result of a significant cyber

incident or otherwise, our ability to communicate internally as well as with our customers and suppliers could be significantly impaired, which may adversely impact our business, operations and reputation.

In the normal course of our business, we collect, store, and transmit proprietary and confidential information regarding our brands, customers, employees, suppliers and others. We also engage third parties that store, process and transmit these types of information, as well as personal information, on our behalf. An operational failure or breach of security from increasingly sophisticated cyber threats could lead to loss, misuse or unauthorized disclosure of this information about our employees or customers, which may result in regulatory or other legal proceedings, and could have a material adverse effect on our business and reputation. We also may not have the resources or technical sophistication to anticipate or prevent rapidly evolving types of cyber-attacks. Any such attacks or precautionary measures taken to prevent anticipated attacks may result in increasing costs, including costs for additional technologies, training, and third-party consultants. The losses incurred from a breach of data security and operational failures as well as the precautionary measures required to address this evolving risk may adversely impact our financial condition, results of operations and cash flows.

We depend on our information systems to process orders, manage inventory and accounts receivable collections, purchase, sell, and ship products efficiently and on a timely basis, maintain cost-effective operations, and provide superior service to our customers.

There can be no assurance that the precautions which we have taken against certain events that could disrupt the operations of our IT systems will prevent the occurrence of such a disruption. Any such disruption could have a material adverse effect on our business and results of operations.

Griffon may be unable to implement its acquisition growth strategy, which may result in added expenses without a commensurate increase in revenue and income, and divert management’s attention.

Making strategic acquisitions is a part of Griffon’s growth plans. The ability to successfully complete acquisitions depends on identifying and acquiring, on acceptable terms, companies that either complement or enhance currently held businesses or expand Griffon into new profitable businesses, and, for certain acquisitions, obtaining financing on acceptable terms. Additionally, Griffon must properly integrate acquired businesses in order to maximize profitability. The competition for acquisition candidates is intense and Griffon cannot assure that it will successfully identify acquisition candidates and complete acquisitions at reasonable purchase prices, in a timely manner, or at all. Further, there is a risk that acquisitions will not be properly integrated into Griffon’s existing structure. In the past, Griffon has consummated a group of acquisitions within a short time period, which could occur again; the risks relating to integration of an acquisition may be exacerbated when numerous acquisitions are consummated in a short time period.

In implementing an acquisition growth strategy, the following may be encountered:

•Costs associated with incomplete or poorly implemented acquisitions;

•Expenses, delays and difficulties of integrating acquired companies into Griffon’s existing organization;

•Dilution of the interest of existing stockholders;

•Diversion of management’s attention; or

•Difficulty in obtaining financing on acceptable terms, or at all.

An unsuccessful implementation of Griffon’s acquisition growth strategy, including the failure to properly integrate acquisitions, could have an adverse impact on Griffon’s results of operations, cash flows and financial condition. We may also incur debt or assume contingent liabilities in connection with acquisitions, which could impose restrictions on our business operations and harm our operating results.

Risks Related to Our Indebtedness

Griffon’s senior notes, which have limited covenants, are not due until 2028; our $800 million Term Loan B (current balance of $449 million), which also has limited covenants, is not due until 2029; and our $500 million revolving line of credit, which has greater covenant requirements, does not mature until 2028. However, in the event the 2028 Senior Notes are not repaid, refinanced, or replaced prior to December 1, 2027, the Revolver will mature on December 1, 2027. There are potential impacts from Griffon’s use of debt to finance certain of its activities, especially acquisitions and expansions, as set forth below.

Compliance with restrictions and covenants in Griffon’s debt agreements may limit its ability to take corporate actions.

Under the credit agreement, Griffon is also required to comply with specific financial ratios and tests. Griffon may not be able to comply in the future with these covenants or restrictions as a result of events beyond its control, such as prevailing economic, financial and industry conditions or a change in control of Griffon. If Griffon defaults in maintaining compliance with the covenants and restrictions in its credit agreement or the senior notes, its lenders could declare all of the principal and interest amounts outstanding due and payable and, in the case of the credit agreement, terminate the commitments to extend credit to Griffon in the future. If Griffon or its subsidiaries are unable to secure credit in the future, its business could be harmed.

Griffon may be unable to raise additional financing if needed.

Griffon may need to raise additional financing in the future in order to implement its business plan, refinance debt, or acquire new or complimentary businesses or assets. Any required additional financing may be unavailable, or only available at unfavorable terms, due to uncertainties in the credit markets. If Griffon raises additional funds by issuing equity securities, current holders of its common stock may experience significant ownership interest dilution and the holders of the new securities may have rights senior to the rights associated with current outstanding common stock.

Griffon’s indebtedness and interest expense could limit cash flow and adversely affect operations and Griffon’s ability to make full payment on outstanding debt.

Griffon’s indebtedness poses potential risks such as:

•A substantial portion of cash flows from operations could be used to pay principal and interest on debt, thereby reducing the funds available for working capital, capital expenditures, acquisitions, product development and other general corporate purposes;

•Insufficient cash flows from operations may force Griffon to sell assets, or seek additional capital, which Griffon may not be able to secure on favorable terms, if at all; and

•Its level of indebtedness may make Griffon more vulnerable to economic or industry downturns.

Risk Related to Our Common Stock

Griffon has the ability to issue additional equity securities, which would lead to dilution of issued and outstanding common stock.

The issuance of additional equity securities or securities convertible into equity securities would result in dilution to existing stockholders’ equity interests. Griffon is authorized to issue, without stockholder vote or approval, 3,000,000 shares of preferred stock in one or more series, and has the ability to fix the rights, preferences, privileges and restrictions of any such series. Any such series of preferred stock could contain dividend rights, conversion rights, voting rights, terms of redemption, redemption prices, liquidation preferences or other rights superior to the rights of holders of Griffon’s common stock. While there is no present intention of issuing any such preferred stock, Griffon reserves the right to do so at any time. In addition, Griffon is authorized to issue, without stockholder approval, up to 85,000,000 shares of common stock, of which 46,346,048 shares, net of treasury shares, were outstanding as of September 30, 2025. Additionally, Griffon is authorized to issue, without stockholder approval, securities convertible into either shares of common stock or preferred stock.

General Risk Factors

Each of Griffon's businesses faces risks related to the disruption of its primary manufacturing facilities.

The manufacturing facilities for each of Griffon's businesses are concentrated in just a few locations, and in the case of CPP, include third-party manufacturing facilities, some of which are abroad in low-cost locations. Any of Griffon's manufacturing facilities, including those of Griffon's third-party suppliers, are subject to disruption for a variety of reasons, such as natural or man-made disasters, pandemics, terrorist activities, disruptions of information technology resources, and utility interruptions. Such disruptions may cause delays in shipping products, which could result in the loss of business or customer trust, adversely affecting Griffon’s businesses and operating results.

Manufacturing capacity constraints or increased manufacturing costs may have a material adverse effect on Griffon's business, results of operations, financial condition and cash flows.

Griffon’s current manufacturing resources may be inadequate to meet significantly increased demand for some of its products. Griffon’s ability to increase its manufacturing capacity depends on many factors, including the availability of capital, steadily increasing consumer demand, equipment delivery, construction lead-times, installation, qualification, and permitting and other regulatory requirements. Increasing capacity through the use of third-party manufacturers may depend on Griffon’s ability to develop and maintain such relationships and the ability of such third parties to devote additional capacity to meet Griffon’s needs.

A lack of sufficient manufacturing capacity to meet demand could cause customer service levels to decrease, which may negatively affect customer demand for Griffon's products and customer relations generally, which in turn could have a material adverse effect on Griffon's business, results of operations, financial condition and cash flows. In addition, operating facilities at or near capacity may also increase production and distribution costs and negatively impact relations with employees or contractors, which could result in disruptions to operations.

In addition, manufacturing costs may increase significantly and Griffon may not be able to pass along all or any of such increase to its customers; and when such increases are passed off to customers, there will be a time lag, which may be significant.

If HBP and CPP do not continue to develop and maintain leading brands or realize the anticipated benefits of advertising and promotion spend, its operating results may suffer.

The ability of HBP and CPP to compete successfully depends in part on the company’s ability to develop and maintain leading brands so that retail and other customers will need its products to meet consumer demand. The development and maintenance of such brands require significant investment in brand-building and marketing initiatives.

Griffon may be required to record impairment charges for goodwill and indefinite-lived intangible assets.

Griffon is required to assess goodwill and indefinite-lived intangible assets annually for impairment or on an interim basis if changes in circumstances or the occurrence of events suggest impairment exists. If impairment testing indicates that the carrying amount of reporting units or indefinite-lived intangible assets exceeds the respective fair value, an impairment charge would be recognized. If goodwill or indefinite-lived intangible assets were to become impaired, the results of operations could be materially and adversely affected.

During the third quarter of fiscal 2025, indicators of goodwill and indefinite-lived intangible asset impairments were present for the Hunter Fan reporting unit within the CPP reportable segment. As a result of this assessment, during the third quarter of fiscal 2025, we recorded pre-tax, non-cash impairment charges of $136,612 and $107,000 related to Hunter Fan's goodwill and indefinite-lived intangible assets, respectively, which resulted in an aggregate decrease of $4.65 in our earnings per share for the year ended September 30, 2025. Indicators of impairment were not present for the HBP reportable segment or the AMES reporting unit within the CPP reportable segment during the fiscal year ended September 30, 2025.

For the fiscal year ended September 30, 2024, the annual impairment testing did not result in any impairments to goodwill or indefinite-lived intangible assets. For the fiscal year ended September 30, 2023, we recorded a non-cash, pre-tax indefinite-lived intangible assets impairment of $109,200, which resulted in an aggregate decrease of $1.49 in our earnings per share for the year ended September 30, 2023. Should we have to record any impairment charges in the future, it could have a significant negative impact on our earnings per share for the year in which any such impairment charge is recorded.

If Griffon's subcontractors or suppliers fail to perform their obligations, Griffon's performance and ability to win future business could be harmed.

Griffon relies on other companies to provide materials, major components and products to fulfill contractual obligations. Such arrangements may involve subcontracts, teaming arrangements, or supply agreements with other companies. There is a risk that Griffon may have disputes regarding the quality and timeliness of work performed. In addition, changes in the economic environment, including constraints on available financing, may adversely affect the financial stability of Griffon's supply chain and their ability to meet their performance requirements or provide needed supplies on a timely basis. A disruption or failure of any supplier could have an adverse effect on Griffon's business resulting in an impact to profitability, possible termination of a contract, imposition of fines or penalties, and harm to Griffon's reputation impacting its ability to secure future business.

Griffon’s companies must continually improve existing products, design and sell new products and invest in research and development in order to compete effectively.

The markets for Griffon’s products are characterized by rapid technological change, evolving industry standards and continuous improvements in products. Due to constant changes in Griffon's markets, future success depends on Griffon's ability to develop new technologies, products, processes and product applications. Griffon's long-term success in the competitive retail environment and the industrial and commercial markets depends on its ability to develop and commercialize a continuing stream of innovative new products that are appealing to ultimate end users and create demand. New product development and commercialization efforts, including efforts to enter markets or product categories in which Griffon has limited or no prior experience, have inherent risks. These risks include the costs involved, such as development and commercialization, product development or launch delays, and the failure of new products and line extensions to achieve anticipated levels of market acceptance or growth in sales or operating income.

Griffon also faces the risk that its competitors will introduce innovative new products that compete with Griffon’s products. In addition, sales generated by new products could cause a decline in sales of Griffon’s other existing products. If new product development and commercialization efforts are not successful, Griffon’s financial results could be adversely affected.

Product and technological developments are accomplished both through internally-funded R&D projects, as well as through strategic partnerships with customers. Because it is not generally possible to predict the amount of time required and costs involved in achieving certain R&D objectives, actual development costs may exceed budgeted amounts and estimated product development schedules may be extended. Griffon’s financial condition and results of operations may be materially and adversely affected if:

•Product improvements are not completed on a timely basis;

•New products are not introduced on a timely basis or do not achieve sufficient market penetration;

•There are budget overruns or delays in R&D efforts; or

•New products experience reliability or quality problems, or otherwise do not meet customer preferences or requirements.

The loss of certain key officers or employees could adversely affect Griffon’s business.

The success of Griffon is materially dependent upon the continued services of certain key officers and employees. The loss of such key personnel could have a material adverse effect on Griffon’s operating results or financial condition.

Griffon is exposed to a variety of risks relating to non-U.S. sales and operations, including non-U.S. economic and political conditions and fluctuations in exchange rates.

Griffon and its companies conduct operations in Canada, Australasia, the U.K., and China, and sell their products in many countries around the world. Sales of products by non-U.S. subsidiaries accounted for approximately 17% of consolidated revenue for the year ended September 30, 2025. These sales could be adversely affected by changes in political and economic conditions, trade protection measures, such as tariffs, the ability of the Company to enter into industrial cooperation agreements (offset agreements), differing intellectual property rights and laws and changes in regulatory requirements that restrict the sales

of products or increase costs in such locations. Enforcement of existing laws in such jurisdictions can be uncertain, and the lack of a sophisticated body of laws can create various uncertainties, including with respect to customer and supplier contracts. Currency fluctuations between the U.S. dollar and the currencies in the non-U.S. regions in which Griffon does business may also have an impact on future reported financial results.

Griffon's international sales and operations are subject to applicable laws relating to trade, export controls and foreign corrupt practices, the violation of which could adversely affect operations. Griffon is subject to various anti-corruption laws that prohibit improper payments or offers of payments to foreign governments and their officials for the purpose of obtaining or retaining business. In addition, Griffon is subject to certain export controls, laws and regulations, as well as to economic sanctions, laws and embargoes imposed by various governments or organizations, including the U.S. and the European Union or member countries. Violations of anti-corruption, export controls or sanctions laws may result in severe criminal or civil sanctions and penalties, including loss of export privileges and loss of authorizations needed to conduct Griffon's international business. Such violations could also result in Griffon being subject to other liabilities, which could have a material adverse effect on Griffon's business, results of operations and financial condition.

Griffon may not be able to protect its proprietary rights.

Griffon relies on a combination of patent, copyright and trademark laws, common law, trade secrets, confidentiality and non-disclosure agreements and other contractual provisions to protect proprietary rights. Such measures do not provide absolute protection and Griffon cannot give assurance that measures for protecting these proprietary rights are and will be adequate, or that competitors will not independently develop similar technologies.

Griffon or its suppliers may inadvertently infringe on, or may be accused of infringing on, proprietary rights of others.

Griffon is regularly improving its technology and employing existing technologies in new ways. Though Griffon takes reasonable precautions to ensure it does not infringe on the rights of others, it is possible that Griffon may inadvertently infringe on, or be accused of infringing on, proprietary rights held by others. If Griffon is found to have infringed on the propriety rights held by others, any related litigation or settlement relating to such infringement may have a material effect on Griffon’s business, results of operations and financial condition.

It is also possible that Griffon’s suppliers may inadvertently infringe on, or be accused of infringing on, proprietary rights held by others. Any such infringement (or alleged infringement) may have a material adverse effect on Griffon’s business, results of operations and financial condition.

Griffon may use artificial intelligence in its business, and challenges with properly managing its use could result in reputational harm, competitive harm and legal liability.

Griffon may use artificial intelligence (“AI”) tools in its operations and systems and, as AI tools become more advanced and reliable, such use may increase. Griffon’s success may become increasingly dependent on its ability to effectively leverage AI to support its operational efficiencies, such as with respect to supply chain, logistical systems, product development and marketing capabilities. Griffon’s competitors may more successfully and more quickly integrate AI solutions, which could adversely impact Griffon's ability to compete effectively. Use of AI exposes Griffon to risks that the AI solutions used may be deficient, produce inaccurate or misleading output, become inoperable or subject Griffon to cybersecurity and data privacy breaches, all of which could lead to operational disruptions, flawed decision-making, increased costs, and difficulties improving product development and marketing through the use of AI, and could impact Griffon’s operational effectiveness and financial condition. Additionally, the use of certain AI solutions could put Griffon’s own information and intellectual property rights at risk or expose Griffon to the risk of infringing third parties’ intellectual property or other rights. The global legal, regulatory, and ethical landscape surrounding AI is evolving rapidly and remains uncertain, which creates continued compliance risk and may increase the operational costs associated with Griffon’s use of AI, may limit Griffon’s ability to fully develop or use AI solutions as intended, and may cause legal repercussions and brand or reputational harm to Griffon.

Griffon is exposed to product liability and warranty claims.

Griffon is subject to product liability and warranty claims in the ordinary course of business, including with respect to former businesses now included within discontinued operations. These claims relate to the conformity of its products with required specifications, and to alleged or actual defects in Griffon’s products (or in end-products in which Griffon’s products were a component part) that cause damage to property or persons. There can be no assurance that the frequency and severity of product liability claims brought against Griffon will not increase, which claims can be brought either by an injured customer of an end product manufacturer who used one of Griffon's products as a component, or by a direct purchaser. There is also no assurance that the number and value of warranty claims will not increase as compared to historical claim rates, or that Griffon's warranty reserve at any particular time is sufficient. No assurance can be given that indemnification from customers or coverage under insurance policies will be adequate to cover future product liability claims against Griffon; for example, product liability insurance typically does not cover claims for punitive damages. Warranty claims are typically not covered by insurance at all. Product liability insurance can be expensive, difficult to maintain and may be unobtainable in the future on acceptable terms. The amount and scope of any insurance coverage may be inadequate if a product liability claim is successfully asserted.

Griffon has been, and may in the future be, subject to claims and liabilities under environmental laws and regulations.

Griffon’s operations and assets are subject to environmental laws and regulations pertaining to the discharge of materials into the environment, the handling and disposal of wastes, including solid and hazardous wastes, and otherwise relating to health, safety and protection of the environment, in the various jurisdictions in which it operates. Griffon does not expect to make any expenditure with respect to ongoing compliance with or remediation under these environmental laws and regulations that would have a material adverse effect on its business, operating results or financial condition. However, the applicable requirements under environmental laws and regulations may change at any time.

Griffon can incur environmental costs related to sites that are no longer owned or operated, as well as third-party sites to which hazardous materials are sent. Material expenditures or liabilities may be incurred in connection with such claims. See the Commitment and Contingencies footnote in the Notes to Consolidated Financial Statements for further information on environmental contingencies. Based on facts presently known, the outcome of current environmental matters are not expected to have a material adverse effect on Griffon’s results of operations and financial condition. However, presently unknown environmental conditions, changes in environmental laws and regulations or other unanticipated events may give rise to claims that may involve material expenditures or liabilities.

Changes in income tax laws and regulations or exposure to additional income tax liabilities could adversely affect profitability.

Griffon is subject to Federal, state and local income taxes in the U.S. and in various taxing jurisdictions outside the U.S. Tax provisions and liabilities are subject to the allocation of income among various U.S. and international tax jurisdictions. Griffon’s effective tax rate could be adversely affected by changes in the mix of earnings in countries with differing statutory tax rates, changes in any valuation allowance for deferred tax assets or the amendment or enactment of tax laws. Further changes in the tax laws could arise as a result of the base erosion and profit shifting project ("Pillar Two") undertaken by the Organization for Economic Co-operation and Development. Certain provisions of Pillar Two have been adopted by taxing authorities in countries in which we do business and could be adopted in additional countries in which we do business. These changes could increase the amount of taxes we pay and therefore decrease our results of operations and cash flows. The amount of income taxes paid is subject to audits by U.S. Federal, state and local tax authorities, as well as tax authorities in the taxing jurisdictions outside the U.S. If such audits result in assessments different from recorded income tax liabilities, Griffon’s future financial results may include unfavorable adjustments to its income tax provision.

Actions taken by activist shareholders could be disruptive and costly and may conflict with or disrupt the strategic direction of our business.

Similar to the activist shareholder campaign initiated in 2021, activist shareholders may from time to time attempt to effect changes in our strategic direction and seek changes regarding Griffon’s corporate governance or structure. Our Board of Directors and management team strive to maintain constructive, ongoing communications with all shareholders who wish to speak with us, including activist shareholders, and welcomes their views and opinions with the goal of working together constructively to enhance value for all shareholders. However, activist campaigns that contest, or conflict with, our strategic direction could have an adverse effect on us because:

a.responding to actions by activist shareholders can disrupt our operations, be costly and time consuming, and divert the attention of our Board and senior management from the pursuit of our business strategies, and

b.perceived uncertainties as to our future direction may cause (i) instability or lack of continuity, which may be exploited by our competitors, (ii) concern on the part of current or potential customers, (iii) loss of business opportunities, or (iv) difficulties in attracting and retaining qualified personnel and business partners.

Activist campaigns may also cause significant fluctuations in our stock price based on temporary or speculative market perceptions, or other factors that do not necessarily reflect the fundamental underlying value of our businesses.

Item 1B. Unresolved Staff Comments

None.

Item 1C. Cybersecurity

Risk Management and Strategy

Griffon relies on electronic information systems, networks and technologies to conduct and support its operations and other functions and activities within the Company and with third parties. We rely on commercially available systems, software, tools, third-party service providers and monitoring to provide security for processing, transmission and storage of confidential information and data. We have an enterprise-grade cybersecurity management program designed to assess, identify, protect, detect and respond to, and manage material risks from cybersecurity threats. To protect our information systems from cybersecurity threats, we use various information technology and cybersecurity tools to safeguard our systems and data, which help prevent, identify, escalate, investigate, remediate, respond and recover from identified vulnerabilities and cybersecurity incidents.

Griffon's cybersecurity risk management program is closely tied to and integrated with the Company's overall enterprise risk management processes.

Griffon has a third-party risk management program regarding the cybersecurity practices of its vendors and partners that is designed to oversee, identify, and minimize material risks from cybersecurity threats associated with the use of such third parties. This program involves vetting of third parties before engagement. Regular monitoring and reviews are conducted to ensure third party vendors and partners comply with Griffon's security standards.

From time to time, Griffon engages external experts, including cybersecurity assessors, consultants, and/or auditors to evaluate cybersecurity measures and risk management processes.

If a cybersecurity incident occurs, our incident response team ("IRT") is immediately notified, and Griffon management is informed about and monitors the prevention, detection, mitigation, and remediation of cybersecurity incidents impacting the Company. The IRT also coordinates further notifications, as applicable, to senior executives and organizational leadership, our Audit Committee and Board of Directors, business partners or service providers, and authorities.

Like most organizations, we and our third-party service providers have experienced and expect to continue to experience actual or attempted cyber-attacks of our information systems and networks. During the reporting period, Griffon has not identified any risks from cybersecurity threats, including as a result of previous cybersecurity incidents, that we believe have materially

affected, or are reasonably likely to materially affect, us, including our business strategy, operating results, and financial condition. However, if any such event, whether actual or perceived, were to occur, it could have a material adverse effect on our business strategy, operating results and financial condition. We continuously use threat models and cyber threat intelligence to identify relevant risks to our businesses and take active measures to mitigate these risks. For more information regarding the risks we face from cybersecurity threats, see Item 1A., "Risk Factors" in this Annual Report on Form 10-K.

Cybersecurity Governance

Cybersecurity is an important part of our enterprise risk management processes and an area of focus for our Board of Directors and management.

The Audit Committee assists the Board of Directors in its oversight of risks related to cybersecurity and directly oversees risk management relating to cybersecurity. The Audit Committee is also responsible for assessing the steps management has taken to monitor and control these risks and exposures, and evaluating guidelines and policies with respect to our cybersecurity risk assessment and risk management. The Audit Committee reviews our cybersecurity program with management and reports to the Board of Directors with respect to, and regarding its review of, the program. Cybersecurity reviews by the Audit Committee generally occur at least annually, or more frequently as determined to be necessary or advisable. From time to time, third-party subject matter experts present to the Audit Committee on contemporary cybersecurity topics of interest.

Griffon also has a Cybersecurity Management Committee, consisting of executives from Griffon and technology leaders from Griffon's business segments, that monitors and assesses progress and performance by Griffon's business segments in the area of cybersecurity; the results of such assessments are reported to the Audit Committee from time to time. The Chief Information Officers of each of HBP and CPP regularly provide updates on material cybersecurity risks to our senior management and to our Audit Committee, and along with their technology teams, are responsible for assessing and managing cybersecurity risks. Each of our business segment Chief Information Officers has over 20 years of experience in cybersecurity, information security, policy, architecture, engineering and incident response.

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