10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q 

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 For the quarterly period ended March 31, 2021

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from          to

Commission File Number: 1-06620

GRIFFON CORPORATION

(Exact name of registrant as specified in its charter) 

Delaware			11-1893410
(State or other jurisdiction of			(I.R.S. Employer
incorporation or organization)			Identification No.)
712 Fifth Ave, 18th Floor	New York	New York	10019
(Address of principal executive offices)			(Zip Code)

(212) 957-5000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.25 par value	GFF	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ☒ Yes ☐ No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). ☒ Yes ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act:

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes ☒ No

The number of shares of common stock outstanding at March 31, 2021 was 56,683,519.

Griffon Corporation and Subsidiaries

Contents

	Page
PART I - FINANCIAL INFORMATION
Item 1 – Financial Statements
Condensed Consolidated Balance Sheets at March 31, 2021 (unaudited) and September 30, 2020	1
Condensed Consolidated Statement of Shareholders’ Equity for the Three and Six Months Ended March 31, 2021 and 2020 (unaudited)	2
Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) for the Three and Six Months Ended March 31, 2021 and 2020 (unaudited)	4
Condensed Consolidated Statements of Cash Flows for the Six Months Ended March 31, 2021 and 2020 (unaudited)	5
Notes to Condensed Consolidated Financial Statements (unaudited)	7
Item 2 – Management’s Discussion and Analysis of Financial Condition and Results of Operations	35
Item 3 - Quantitative and Qualitative Disclosures about Market Risk	51
Item 4 - Controls & Procedures	51
PART II – OTHER INFORMATION
Item 1 – Legal Proceedings	52
Item 1A – Risk Factors	52
Item 2 – Unregistered Sales of Equity Securities and Use of Proceeds	52
Item 3 – Defaults Upon Senior Securities	52
Item 4 – Mine Safety Disclosures	52
Item 5 – Other Information	52
Item 6 – Exhibits	53
Signatures	54

Part I – Financial Information

Item 1 – Financial Statements

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands)

	(Unaudited)
	March 31, 2021		September 30, 2020
CURRENT ASSETS
Cash and equivalents	$	175,564	$	218,089
Accounts receivable, net of allowances of $9,594 and $8,505	399,193		340,546
Contract assets, net of progress payments of $20,449 and $24,175	75,000		84,426
Inventories	484,753		413,825
Prepaid and other current assets	55,705		46,897
Assets of discontinued operations	1,525		2,091
Total Current Assets	1,191,740		1,105,874
PROPERTY, PLANT AND EQUIPMENT, net	341,005		343,964
OPERATING LEASE RIGHT-OF-USE ASSETS	154,929		161,627
GOODWILL	446,365		442,643
INTANGIBLE ASSETS, net	357,506		355,028
OTHER ASSETS	27,440		32,897
ASSETS OF DISCONTINUED OPERATIONS	5,295		6,406
Total Assets	$	2,524,280	$	2,448,439
CURRENT LIABILITIES
Notes payable and current portion of long-term debt	$	14,913	$	9,922
Accounts payable	257,286		232,107
Accrued liabilities	151,091		163,994
Current portion of operating lease liabilities	30,685		31,848
Liabilities of discontinued operations	4,600		3,797
Total Current Liabilities	458,575		441,668
LONG-TERM DEBT, net	1,043,859		1,037,042
LONG-TERM OPERATING LEASE LIABILITIES	128,714		136,054
OTHER LIABILITIES	122,286		126,510
LIABILITIES OF DISCONTINUED OPERATIONS	6,415		7,014
Total Liabilities	1,759,849		1,748,288
COMMITMENTS AND CONTINGENCIES - See Note 22
SHAREHOLDERS’ EQUITY
Total Shareholders’ Equity	764,431		700,151
Total Liabilities and Shareholders’ Equity	$	2,524,280	$	2,448,439

The accompanying notes to condensed consolidated financial statements are an integral part of these statements.

1

GRIFFON CORPORATION

CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS’ EQUITY

For the Three and Six Months Ended March 31, 2021

(Unaudited) 

	COMMON STOCK			CAPITAL IN EXCESS OF PAR VALUE		RETAINED EARNINGS		TREASURY SHARES			ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)		DEFERRED COMPENSATION
(in thousands)	SHARES	PAR VALUE						SHARES	COST						TOTAL
Balance at September 30, 2020	83,739	$	20,935	$	583,008	$	607,518	27,610	$	(413,493)	$	(72,092)	$	(25,725)	$	700,151
Net income	—	—		—		29,500		—	—		—		—		29,500
Dividend	—	—		—		(4,469)		—	—		—		—		(4,469)
Shares withheld on employee taxes on vested equity awards	—	—		—		—		133	(2,909)		—		—		(2,909)
Amortization of deferred compensation	—	—		—		—		—	—		—		609		609
Equity awards granted, net	494	123		(123)		—		—	—		—		—		—
ESOP allocation of common stock	—	—		596		—		—	—		—		—		596
Stock-based compensation	—	—		3,428		—		—	—		—		—		3,428
Other comprehensive income, net of tax	—	—		—		—		—	—		13,141		—		13,141
Balance at December 31, 2020	84,233	$	21,058	$	586,909	$	632,549	27,743	$	(416,402)	$	(58,951)	$	(25,116)	740,047
Net income	—	—		—		17,112		—	—		—		—		17,112
Dividend	—	—		—		(3,217)		—	—		—		—		(3,217)
Amortization of deferred compensation	—	—		—		—		—	—		—		609		609
Equity awards granted, net	194	48		(48)		—		—	—		—		—		—
ESOP allocation of common stock	—	—		756		—		—	—		—		—		756
Stock-based compensation	—	—		4,349		—		—	—		—		—		4,349
Other comprehensive income, net of tax	—	—		—		—		—	—		4,775		—		4,775
Balance at March 31, 2021	84,427	$	21,106	$	591,966	$	646,444	27,743	$	(416,402)	$	(54,176)	$	(24,507)	$	764,431

The accompanying notes to condensed consolidated financial statements are an integral part of these statements.

2

GRIFFON CORPORATION

CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS’ EQUITY

For the Three and Six Months Ended March 31, 2020

(Unaudited) 

	COMMON STOCK			CAPITAL IN EXCESS OF PAR VALUE		RETAINED EARNINGS		TREASURY SHARES			ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)		DEFERRED COMPENSATION
(in thousands)	SHARES	PAR VALUE						SHARES	COST						TOTAL
Balance at September 30, 2019	82,775	$	20,694	$	519,017	$	568,516	35,969	$	(536,308)	$	(65,916)	$	(28,240)	$	477,763
Net income	—	—		—		10,612		—	—		—		—		10,612
Dividend	—	—		—		(3,392)		—	—		—		—		(3,392)
Shares withheld on employee taxes on vested equity awards	—	—		—		—		80	(1,758)		—		—		(1,758)
Amortization of deferred compensation	—	—		—		—		—	—		—		629		629
Equity awards granted, net	182	45		(45)		—		—	—		—		—		—
ESOP allocation of common stock	—	—		609		—		—	—		—		—		609
Stock-based compensation	—	—		3,150		—		—	—		—		—		3,150
Stock-based consideration	—	—		239		—		—	—		—		—		239
Other comprehensive income, net of tax	—	—		—		—		—	—		6,841		—		6,841
Balance at December 31, 2019	82,957	$	20,739	$	522,970	$	575,736	36,049	$	(538,066)	$	(59,075)	$	(27,611)	$	494,693
Net income	—	—		—		895		—	—		—		—		895
Dividend	—	—		—		(3,422)		—	—		—		—		(3,422)
Shares withheld on employee taxes on vested equity awards	—	—		—		—		261	(5,721)		—		—		(5,721)
Amortization of deferred compensation	—	—		—		—		—	—		—		629		629
Equity awards granted, net	784	196		(196)		—		—	—		—		—		—
ESOP allocation of common stock	—	—		435		—		—	—		—		—		435
Stock-based compensation	—	—		3,662		—		—	—		—		—		3,662
Stock-based consideration	—	—		117		—		—	—		—		—		117
Other comprehensive income, net of tax	—	—		—		—		—	—		(14,834)		—		(14,834)
Balance at March 31, 2020	83,741	$	20,935	$	526,988	$	573,209	36,310	$	(543,787)	$	(73,909)	$	(26,982)	$	476,454

The accompanying notes to condensed consolidated financial statements are an integral part of these statements.

3

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)

(in thousands, except per share data)

(Unaudited) 

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Revenue	$	634,832	$	566,350	$	1,244,123	$	1,114,788
Cost of goods and services	464,516		414,318		903,635		812,835
Gross profit	170,316		152,032		340,488		301,953
Selling, general and administrative expenses	126,827		126,467		248,384		244,265
Income from operations	43,489		25,565		92,104		57,688
Other income (expense)
Interest expense	(15,831)		(16,871)		(31,521)		(33,082)
Interest income	304		310		349		571
Gain (adjustment) on sale of business	(949)		—		5,291		—
Loss from debt extinguishment, net	—		(6,690)		—		(6,690)
Other, net	847		615		806		1,393
Total other expense, net	(15,629)		(22,636)		(25,075)		(37,808)
Income before taxes	27,860		2,929		67,029		19,880
Provision for income taxes	10,748		2,034		20,417		8,373
Net income	$	17,112	$	895	$	46,612	$	11,507
Basic earnings per common share	$	0.34	$	0.02	$	0.92	$	0.28
Basic weighted-average shares outstanding	50,838		41,565		50,717		41,369
Diluted earnings per common share	$	0.32	$	0.02	$	0.88	$	0.26
Diluted weighted-average shares outstanding	53,264		43,734		53,211		43,826
Dividends paid per common share	$	0.08	$	0.075	$	0.16	$	0.15
Net income	$	17,112	$	895	$	46,612	$	11,507
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	1,739		(16,471)		13,862		(10,001)
Pension and other post retirement plans	1,245		669		2,951		1,341
Change in cash flow hedges	1,791		968		1,103		667
Total other comprehensive income (loss), net of taxes	4,775		(14,834)		17,916		(7,993)
Comprehensive income, net	$	21,887	$	(13,939)	$	64,528	$	3,514

The accompanying notes to condensed consolidated financial statements are an integral part of these statements.

4

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(Unaudited)

	Six Months Ended March 31,
	2021		2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	46,612	$	11,507
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	31,149		31,544
Stock-based compensation	9,501		8,302
Asset impairment charges - restructuring	8,291		4,692
Provision for losses on accounts receivable	194		596
Amortization of debt discounts and issuance costs	1,349		2,267
Loss from debt extinguishment, net	—		6,690
Deferred income taxes	2,334		408
Loss (gain) on sale of assets and investments	151		(274)
Gain on sale of business	(5,291)		—
Change in assets and liabilities, net of assets and liabilities acquired:
Increase in accounts receivable and contract assets, net	(47,146)		(61,815)
Increase in inventories	(74,186)		(21,262)
(Increase) decrease in prepaid and other assets	271		(6,005)
Increase (decrease) in accounts payable, accrued liabilities, income taxes payable and operating lease liabilities	(1,470)		(38,053)
Other changes, net	2,400		560
Net cash used in operating activities	(25,841)		(60,843)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(23,986)		(22,519)
Acquired businesses, net of cash acquired	(2,242)		(10,531)
Proceeds from sale of business, net	14,725		—
Investment purchases	(2,138)		—
Proceeds from the sale of property, plant and equipment	82		290
Other, net	27		—
Net cash used in investing activities	(13,532)		(32,760)
CASH FLOWS FROM FINANCING ACTIVITIES:
Dividends paid	(8,678)		(7,349)
Purchase of shares for treasury	(2,909)		(7,479)
Proceeds from long-term debt	14,029		1,061,343
Payments of long-term debt	(7,573)		(939,071)
Financing costs	(571)		(13,176)
Other, net	(214)		83
Net cash provided by (used in) financing activities	(5,916)		94,351

The accompanying notes to condensed consolidated financial statements are an integral part of these statements.

5

GRIFFON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(Unaudited)

	Six Months Ended March 31,
	2021		2020
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in operating activities	(1,512)		(1,994)
Net cash provided by investing activities	2,749		—
Net cash provided by (used in) discontinued operations	1,237		(1,994)
Effect of exchange rate changes on cash and equivalents	1,527		(2,107)
NET DECREASE IN CASH AND EQUIVALENTS	(42,525)		(3,353)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	218,089		72,377
CASH AND EQUIVALENTS AT END OF PERIOD	$	175,564	$	69,024

The accompanying notes to condensed consolidated financial statements are an integral part of these statements.

6

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

NOTE 1 – 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 in connection with divestitures. In order to further diversify, Griffon also seeks out, evaluates and, when appropriate, will acquire additional businesses that offer potentially attractive returns on capital.

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 currently conducts its operations through three reportable segments:

•Consumer and Professional Products ("CPP") conducts its operations through The AMES Companies, Inc. ("AMES"). Founded in 1774, AMES is the leading North American manufacturer and a global provider of branded consumer and professional tools and products for home storage and organization, landscaping, and enhancing outdoor lifestyles. CPP sells products globally through a portfolio of leading brands including True Temper, AMES, and ClosetMaid.

•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 CornellCookson brand.

•Defense Electronics ("DE") conducts its operations through Telephonics Corporation ("Telephonics"), founded in 1933, a globally recognized leading provider of highly sophisticated intelligence, surveillance and communications solutions for defense, aerospace and commercial customers.

In March 2020, the World Health Organization declared the outbreak of COVID-19 a pandemic, which continues to spread throughout the U.S. and the world. The impact from the rapidly changing U.S. and global market and economic conditions due to the COVID-19 outbreak is uncertain, with disruptions to the business of our customers and suppliers, which could impact our business and consolidated results of operations and financial condition in the future. While we have not incurred significant disruptions to our manufacturing or to our supply chain thus far from the COVID-19 outbreak, we are unable to accurately predict the impact COVID-19 will have due to numerous uncertainties, including the severity of the disease, the duration of the outbreak, actions that may be taken by governmental authorities, the impact to our customers’ and suppliers’ businesses and other factors identified in Part II, Item 1A “Risk Factors” in this Form 10-Q. We will continue to evaluate the nature and extent of the impact to our business, consolidated results of operations, and financial condition.

7

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

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 year ended September 30, 2020, 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 CPP operations 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, 2020 was derived from the audited financial statements included in Griffon’s Annual Report on Form 10-K for the year ended September 30, 2020.

The condensed consolidated financial statements include the accounts of Griffon and all subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

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. Significant estimates include allowances for doubtful accounts receivable and returns, net realizable value of inventories, restructuring reserves, valuation of goodwill and intangible assets, sales, profits and loss recognition for performance obligations satisfied over time, 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, assumption 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, assumptions associated with valuation of acquired assets and assumed liabilities of acquired companies 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.

Certain amounts in the prior year have been reclassified to conform to current year presentation.

NOTE 2 – FAIR VALUE MEASUREMENTS

The carrying values of cash and equivalents, accounts receivable, accounts and notes payable, and revolving credit and variable interest rate debt approximate fair value due to either the short-term nature of such instruments or the fact that the interest rate of the revolving credit and variable rate debt is based upon current market rates.

Applicable accounting guidance establishes a fair value hierarchy requiring the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the hierarchy is based on the lowest level of input that is significant to the fair value measurement. The accounting guidance establishes three levels of inputs that may be used to measure fair value, as follows:

•Level 1 inputs are measured and recorded at fair value based upon quoted prices in active markets for identical assets.

•Level 2 inputs include inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities.

8

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

•Level 3 inputs are unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The fair values of Griffon’s 2028 senior notes approximated $1,060,000 on March 31, 2021. Fair values were based upon quoted market prices (level 1 inputs).

Insurance contracts with values of $3,821 at March 31, 2021 are measured and recorded at fair value based upon quoted prices in active markets for similar assets (level 2 inputs) and are included in Prepaid and other current assets on the Consolidated Balance Sheets.

Items Measured at Fair Value on a Recurring Basis

At March 31, 2021, trading securities, measured at fair value based on quoted prices in active markets for similar assets (level 2 inputs), with a fair value of $2,088 ($1,000 cost basis), were included in Prepaid and other current assets on the Consolidated Balance Sheets. Realized and unrealized gains and losses on trading securities are included in Other income in the Consolidated Statements of Operations and Comprehensive Income (Loss).

In the normal course of business, Griffon’s operations are exposed to the effects of changes in foreign currency exchange rates. To manage these risks, Griffon may enter into various derivative contracts such as foreign currency exchange contracts, including forwards and options. As of March 31, 2021, Griffon entered into several such contracts in order to lock into a foreign currency rate for planned settlements of trade and inter-company liabilities payable in US dollars.

At March 31, 2021, Griffon had $61,000 of Australian dollar contracts at a weighted average rate of $1.29 which qualified for hedge accounting (level 2 inputs). These hedges were all deemed effective as cash flow hedges with gains and losses related to changes in fair value deferred and recorded in Accumulated other comprehensive income (loss) ("AOCI") and Prepaid and other current assets, or Accrued liabilities, until settlement. Upon settlement, gains and losses are recognized in the Consolidated Statements of Operations and Comprehensive Income (Loss) in Cost of goods and services ("COGS"). AOCI included deferred losses of $831 ($582, net of tax) at March 31, 2021. Upon settlement, losses of $1,741 and $2,399 were recorded in COGS during the three and six months ended March 31, 2021, respectively. All contracts expire in 30 to 180 days.

At March 31, 2021, Griffon had $7,935 of Canadian dollar contracts at a weighted average rate of $1.30. The contracts, which protect Canadian operations from currency fluctuations for US dollar based purchases, do not qualify for hedge accounting. For the three and six months ended March 31, 2021, fair value gains of $520 and $244, respectively, were recorded to Other liabilities and to Other income for the outstanding contracts, based on similar contract values (level 2 inputs). Realized losses of $102 and $161 were recorded in Other income during the three and six months ended March 31, 2021, respectively, for all settled contracts. All contracts expire in 29 to 450 days.

At March 31, 2021, Griffon had $5,200 of British Pound dollar contracts at a weighted average rate of $0.75. The contracts, which protect United Kingdom operations from currency fluctuations for US dollar based purchases, do not qualify for hedge accounting. For the three and six months ended March 31, 2021, fair value gains of $386 and $141, respectively, were recorded to Other assets and to Other income for the outstanding contracts, based on similar contract values (level 2 inputs). Realized losses of $211 and $281 were recorded in Other income during the three and six months ended March 31, 2021, respectively. All contracts expire in 6 to 104 days.

NOTE 3 – REVENUE

The Company recognizes revenue when performance obligations identified under the terms of contracts with its customers are satisfied. A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer, and is the unit of accounting. A contract with a customer is an agreement which both parties have approved, that creates enforceable rights and obligations, has commercial substance and with respect to which payment terms are identified and collectability is probable. Once the Company has entered into a contract or purchase order, it is evaluated to identify performance obligations. For each performance obligation, revenue is recognized when control of the promised products is transferred to the customer, or services are satisfied under the contract or purchase order, in an amount that reflects

9

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

the consideration the Company expects to be entitled to in exchange for those products or services (the transaction price).

Approximately 86% of the Company’s performance obligations are recognized at a point in time related to the manufacture and sale of a broad range of products and components primarily within the CPP and HBP Segments, and revenue is recognized when title, and risk and rewards of ownership, have transferred to the customer, which is generally upon shipment.

Approximately 14% of the Company’s performance obligations are recognized over time and relate to prime or subcontractors from contract awards with the U.S. Government, as well as foreign governments and other commercial customers within our DE Segment. Revenue recognized over time are generally accounted for using an input measure to determine progress completed at the end of the period. We believe that cumulative costs incurred to date as a percentage of estimated total contract costs at completion (cost-to-cost method) is an appropriate measure of progress towards satisfaction of performance obligations recognized over time, as it most accurately depicts the progress of our work and transfer of control to our customers.

Accounting for the sales and profits on performance obligations for which progress is measured using the cost-to-cost method relies on the substantial use of estimates; these projections may be revised throughout the life of a contract. Adjustments to estimates for a contract's estimated costs at completion and estimated profit or loss are often required as experience is gained, more information is obtained (even though the scope of work required under the contract may or may not change) and contract modifications occur. The impact of such adjustments to estimates is made on a cumulative basis in the period when such information has become known. For the three and six months ended March 31, 2021, income from operations included net unfavorable catch up adjustments approximating $1,423 and $3,220, respectively. For the three and six months ended March 31, 2020, income from operations included net unfavorable catch up adjustments of $2,188 and $422, respectively. Gross profit is impacted by a variety of factors, including the mix of products, systems and services, production efficiencies, price competition and general economic conditions.

For contracts in which anticipated total costs exceed the total expected revenue, an estimated loss is recognized in the period when identifiable. A provision for the entire amount of the estimated loss is recorded on a cumulative basis, and is recorded as a reduction to gross margin on the Consolidated Statements of Operations and Comprehensive Income (Loss). These provisions had an immaterial impact on Griffon's Consolidated Financial Statements. The estimated remaining costs to complete loss contracts as of March 31, 2021 and September 30, 2020 were approximately $8,500 and $10,800, respectively.

For a complete explanation of Griffon’s revenue accounting policies, this note should be read in conjunction with Griffon’s Annual Report on Form 10-K for the year ended September 30, 2020. See Note 13 - Business Segments for revenue from contracts with customers disaggregated by end markets, segments and geographic location.

Transaction Price Allocated to the Remaining Performance Obligations

On March 31, 2021, we had $353,870 of remaining performance obligations, which we also refer to as total backlog. We expect to recognize approximately 65% of our remaining performance obligations as revenue within one year, with the balance to be completed thereafter.

Backlog represents the dollar value of funded orders for which work has not been performed. Backlog generally increases with bookings, and converts into revenue as we incur costs related to contractual commitments or the shipment of product. Given the nature of our business and a larger dependency on international customers, our bookings, and therefore our backlog, is impacted by the longer maturation cycles resulting in delays in the timing and amounts of such awards, which are subject to numerous factors, including fiscal constraints placed on customer budgets; political uncertainty; the timing of customer negotiations; and the timing of governmental approvals.

Contract Balances

Contract assets were $75,000 as of March 31, 2021 compared to $84,426 as of September 30, 2020. The $9,426 net decrease in our contract assets balance was primarily due to the timing of billings and work performed in Surveillance programs and decrease associated with the sale of Systems Engineering Group, Inc. ("SEG"). Contract assets primarily relate to the Company's right to consideration for work completed but not billed at the reporting date and are recorded in Contract costs and recognized income not yet billed, net of progress payments in the Consolidated Balance Sheets. Contract assets are transferred to receivables when the right to consideration becomes unconditional. Contract costs and recognized income not yet billed

10

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

consists of amounts accounted for under the percentage of completion method of accounting, and represent recoverable costs and accrued profit that cannot yet be invoiced under the terms of certain long-term contracts. Amounts will be invoiced when applicable contract terms, such as the achievement of specified milestones or product delivery, are met. At March 31, 2021 and September 30, 2020, approximately $7,700 and $7,500, respectively, of contract costs and recognized income not yet billed were expected to be collected after one year.

Contract liabilities were $22,964 as of March 31, 2021 compared to $24,386 as of September 30, 2020. The $1,422 decrease in the contract liabilities balance was primarily due to recognition of revenue in Naval & Cyber systems, partially offset by billings in Surveillance and Communications programs. Contract liabilities relate to advance consideration received from customers for which revenue has not been recognized. The Company often receives cash payments from customers in advance of the Company’s performance resulting in contract liabilities. These contract liabilities are classified as current on the Consolidated Balance Sheets based on the timing of when the Company expects to recognize revenue. Current contract liabilities are recorded in Accounts payable on the Consolidated Balance Sheets. Contract liabilities are reduced when the associated revenue from the contract is recognized.

NOTE 4 – ACQUISITIONS AND DISPOSITIONS

Acquisitions

Griffon accounts for acquisitions under the acquisition method, in which assets acquired and liabilities assumed are recorded at fair value as of the date of acquisition using a method substantially similar to the goodwill impairment test methodology (level 3 inputs). The operating results of the acquired companies are included in Griffon’s consolidated financial statements from the date of acquisition; in each instance, Griffon is in the process of finalizing the initial purchase price allocation unless otherwise noted.

On December 22, 2020, AMES acquired Quatro Design Pty Ltd (“Quatro”), a leading Australian manufacturer and supplier of glass fiber reinforced concrete landscaping products for residential, commercial, and public sector projects for a purchase price of AUD $3,500 (approximately $2,700) in cash. The purchase price is subject to additional contingent consideration of approximately AUD $1,000 (approximately $760) based on Quatro exceeding certain EBITDA performance targets in the first year. The preliminary acquired intangibles and goodwill allocated to this acquisition was AUD $2,755 (approximately $2,082) and AUD $1,648 (approximately $1,246), respectively, which was assigned to the CPP segment, and is not deductible for income tax purposes.

On November 29, 2019, AMES acquired 100% of the outstanding stock of Vatre Group Limited ("Apta"), a leading United Kingdom supplier of innovative garden pottery and associated products sold to leading UK and Ireland garden centers for approximately $10,500 (GBP 8,750), inclusive of a post-closing working capital adjustment, net of cash acquired. This acquisition broadens AMES' product offerings in the UK market and increases its in-country operational footprint. The excess of the purchase price over the fair value of the net tangible and intangible assets was recorded as goodwill and is deductible for tax purposes. The purchase price allocation was finalized and allocated to goodwill of GBP 3,449, acquired intangible assets of GBP 3,454, inventory of GBP 2,914, accounts receivable and other assets of GBP 2,492 and accounts payable and other accrued liabilities of GBP 3,765, which was assigned to the CPP segment.

During the three and six months ended March 31, 2021, acquisition costs were de minimis. During both the three and six months ended March 31, 2020, the Company incurred acquisition costs of $2,960.

Dispositions

On December 18, 2020, Defense Electronics completed the sale of its SEG business for $15,000. SEG provides sophisticated, highly technical engineering and analytical support to the Missile Defense Agency and various U.S. military commands. SEG had sales of approximately $7,000 for the first fiscal quarter ended December 31, 2020 and $31,000 for the fiscal year ended September 30, 2020. DE recorded a pre-tax gain of $5,291 ($5,251, net of tax, or $0.10 per share) related to the divestiture of SEG. The sale does not represent a strategic shift that will have a major effect on operations and financial results.

11

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

NOTE 5 – INVENTORIES

Inventories are stated at the lower of cost (first-in, first-out or average cost) or market.

The following table details the components of inventory:

	At March 31, 2021		At September 30, 2020
Raw materials and supplies	$	155,720	$	146,351
Work in process	86,299		83,697
Finished goods	242,734		183,777
Total	$	484,753	$	413,825

NOTE 6 – PROPERTY, PLANT AND EQUIPMENT

The following table details the components of property, plant and equipment, net:

	At March 31, 2021		At September 30, 2020
Land, building and building improvements	$	169,081	$	167,005
Machinery and equipment	611,187		595,126
Leasehold improvements	53,952		53,386
	834,220		815,517
Accumulated depreciation and amortization	(493,215)		(471,553)
Total	$	341,005	$	343,964

Depreciation and amortization expense for property, plant and equipment was $13,450 and $13,316 for the quarters ended March 31, 2021 and 2020, respectively, and $26,338 and $26,748 for the six months ended March 31, 2021 and 2020, respectively. Depreciation included in Selling, general and administrative ("SG&A") expenses was $5,014 and $4,910 for the quarters ended March 31, 2021 and 2020, respectively, and $9,720 and $9,861 for the six months ended March 31, 2021 and 2020, respectively. Remaining components of depreciation, attributable to manufacturing operations, are included in Cost of goods and services.

12

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

NOTE 7 – CREDIT LOSSES

Effective October 1, 2020, the Company adopted accounting guidance related to accounting for credit losses on financial instruments, including trade receivables (ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments). The guidance requires companies to consider forward-looking information to estimate expected credit losses, resulting in earlier recognition of losses for receivables that are current or not yet due, which were not considered under the previous accounting guidance.

The Company is exposed to credit losses primarily through sales of products and services. Trade receivables are recorded at their stated amount, less allowances for discounts, doubtful accounts and returns. The Company’s expected loss allowance methodology for trade receivables is primarily based on the aging method of the accounts receivables balances and the financial condition of its customers. The allowances represent estimated uncollectible receivables associated with potential customer defaults on contractual obligations (usually due to customers’ potential insolvency), discounts related to early payment of accounts receivables by customers and estimates for returns. The allowance for doubtful accounts includes amounts for certain customers in which a risk of default has been specifically identified, as well as an amount for customer defaults, based on a formula, when it is determined the risk of some default is probable and estimable, but cannot yet be associated with specific customers. Allowance for discounts and returns are recorded as a reduction of revenue and the provision related to the allowance for doubtful accounts is recorded in SG&A expenses.

The Company also considers current and expected future economic and market conditions, such as the COVID-19 pandemic, when determining any estimate of credit losses. Generally, estimates used to determine the allowance are based on assessment of anticipated payment and all other historical, current and future information that is reasonably available. All accounts receivable amounts are expected to be collected in less than one year.

Based on a review of the Company's policies and procedures across all segments, including the aging of its trade receivables, recent write-off history and other factors related to future macroeconomic conditions, Griffon determined that its method to determine credit losses and the amount of its allowances for bad debts is in accordance with this guidance in all material respects.

The following table provides a roll-forward of the allowance for credit losses that is deducted from the amortized cost basis of accounts receivable to present the net amount expected to be collected:

Beginning Balance, October 1, 2020	$	8,505
Provision for expected credit losses	1,228
Amounts written off charged against the allowance	(161)
Other, primarily foreign currency translation	22
Ending Balance, March 31, 2021	$	9,594

13

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

NOTE 8 – GOODWILL AND OTHER INTANGIBLES

The following table provides changes in the carrying value of goodwill by segment during the six months ended March 31, 2021:

	At September 30, 2020		Business Acquisitions (a)		Business Divestitures (b)		Foreign  currency translations adjustments		At March 31, 2021
Consumer and Professional Products	$	232,845	$	1,246	$	—	$	3,287	$	237,378
Home and Building Products	191,253		—		—		—		191,253
Defense Electronics	18,545		—		(811)		—		17,734
Total	$	442,643	$	1,246	$	(811)	$	3,287	$	446,365

(a) The increase in the CPP segment was due to the acquisition of Quatro.

(b) The decrease in the DE segment was due to the divestiture of SEG.

The following table provides the gross carrying value and accumulated amortization for each major class of intangible assets:

	At March 31, 2021					At September 30, 2020
	Gross Carrying Amount		Accumulated Amortization		Average Life (Years)	Gross Carrying Amount		Accumulated Amortization
Customer relationships & other	$	189,189	$	71,840	23	$	185,940	$	66,656
Technology and patents	19,529		8,030		13	19,464		8,360
Total amortizable intangible assets	208,718		79,870			205,404		75,016
Trademarks	228,658		—			224,640		—
Total intangible assets	$	437,376	$	79,870		$	430,044	$	75,016

The gross carrying amount of intangible assets was impacted by approximately $5,250 related to foreign currency translation.

Amortization expense for intangible assets was $2,433 and $2,403 for the quarters ended March 31, 2021 and 2020, respectively, and $4,811 and $4,796 for the six months ended March 31, 2021 and 2020. Amortization expense for the remainder of 2021 and the next five fiscal years and thereafter, based on current intangible balances and classifications, is estimated as follows: 2021 - $4,574; 2022 - $9,376; 2023 - $9,224; 2024 - $9,198; 2025 - $9,198; 2026 - $9,198; thereafter $78,080.

Griffon performs its annual goodwill impairment testing in the fourth quarter of each year. The 2020 impairment testing resulted in all three reporting units having fair values substantially in excess of their carrying values. In addition to the annual impairment test, the Company is required to regularly assess whether a triggering event has occurred which would require interim impairment testing. In connection with the sale of the SEG business, the Company assessed the remaining DE reporting unit for impairment. The assessment determined that the fair value of the DE reporting unit substantially exceeded its carrying value and no impairment existed. During the six months ended March 31, 2021, the Company determined that there were no other triggering events and, as a result, there was no impairment to either its goodwill or indefinite-lived intangible assets at March 31, 2021.

14

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

NOTE 9 – INCOME TAXES

During the quarter ended March 31, 2021, the Company recognized a tax provision of $10,748 on income before taxes of $27,860, compared to a tax provision of $2,034 on income before taxes of $2,929 in the comparable prior year quarter. The current year quarter results included restructuring charges of $7,562 ($5,651, net of tax), reduction to gain on sale of the SEG business of $949 ($766, net of tax) and discrete and certain other tax provisions, net, that affect comparability of $1,913. The prior year quarter results included restructuring charges of $3,104 ($3,005, net of tax), acquisition costs of $2,960 ($2,321, net of tax), loss from debt extinguishment of $6,690 ($5,245, net of tax) and discrete tax and certain other tax benefits, net, that affect comparability of $1,413. Excluding these items, the effective tax rates for the quarters ended March 31, 2021 and 2020 were 30.0% and 35.9%, respectively.

During the six months ended March 31, 2021, the Company recognized a tax provision of $20,417 on Income before taxes of $67,029, compared to a tax provision of $8,373 on income before taxes of $19,880 in the comparable prior year period. The six month period ended March 31, 2021 included restructuring charges of $18,362 ($13,951, net of tax), gain on sale of the SEG business of $5,291 ($5,251, net of tax) and discrete and certain other tax benefits, net, that affect comparability of $115. The six month period ended March 31, 2020 included restructuring charges of $9,538 ($7,153, net of tax), acquisition costs of $2,960 ($2,321, net of tax), loss from debt extinguishment of $6,690 ($5,245, net of tax) and discrete tax and certain other tax benefits, net, that affect comparability of $580. Excluding these items, the effective tax rates for the six months ended March 31, 2021 and 2020 were 31.1% and 34.4%, respectively.

15

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

NOTE 10 – LONG-TERM DEBT

		At March 31, 2021										At September 30, 2020
		Outstanding Balance		Original Issuer Premium		Capitalized Fees & Expenses		Balance Sheet		Coupon Interest Rate		Outstanding Balance		Original Issuer Premium		Capitalized Fees & Expenses		Balance Sheet		Coupon Interest Rate
Senior notes due 2028	(a)	$	1,000,000	$	339	(14,329)		$	986,010	5.75	%	$	1,000,000	$	363	$	(15,376)	$	984,987	5.75	%
Revolver due 2025	(b)	20,622		—		(1,963)		18,659		Variable		12,858		—		(2,209)		10,649		Variable
Finance lease - real estate	(c)	15,924		—		(17)		15,907		5.60	%	17,218		—		(30)		17,188		5.60	%
Non US lines of credit	(d)	4,405		—		(24)		4,381		Variable		—		—		(30)		(30)		Variable
Non US term loans	(d)	29,870		—		(133)		29,737		Variable		31,086		—		(160)		30,926		Variable
Other long term debt	(e)	4,094		—		(16)		4,078		Variable		3,260		—		(16)		3,244		Variable
Totals		1,074,915		339		(16,482)		1,058,772				1,064,422		363		(17,821)		1,046,964
less: Current portion		(14,913)		—		—		(14,913)				(9,922)		—		—		(9,922)
Long-term debt		$	1,060,002	$	339	$	(16,482)	$	1,043,859			$	1,054,500	$	363	$	(17,821)	$	1,037,042

		Three Months Ended March 31, 2021										Three Months Ended March 31, 2020
		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense
Senior notes due 2028	(a)	6.0	%	$	14,375	$	12	$	505	$	14,892	6.0	%	$	5,566	$	—	$	135	$	5,701
Senior notes due 2022	(a)	—		—		—		—		—		5.7	%	8,040		45		628		8,713
Revolver due 2025	(b)	Variable		287		—		122		409		Variable		1,819		—		165		1,984
Finance lease - real estate	(c)	5.9	%	224		—		7		231		6.1	%	52		—		7		59
Non US lines of credit	(d)	Variable		4		—		4		8		Variable		3		—		8		11
Non US term loans	(d)	Variable		163		—		18		181		Variable		292		—		7		299
Other long term debt	(e)	Variable		115		—		1		116		Variable		132		—		—		132
Capitalized interest				(6)		—		—		(6)				(28)		—		—		(28)
Totals				$	15,162	$	12	$	657	$	15,831			$	15,876	$	45	$	950	$	16,871

16

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

		Six Months Ended March 31, 2021										Six Months Ended March 31, 2020
		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense
Senior notes due 2028	(a)	6.0	%	$	28,750	$	24	$	1,023	$	29,797	6.0	%	$	5,566	$	—	$	135	$	5,701
Senior notes due 2022	(a)	—		—		—		—		—		5.7	%	21,165		112		1,579		22,856
Revolver due 2025	(b)	Variable		416		—		245		661		Variable		3,201		—		397		3,598
Finance lease - real estate	(c)	5.6	%	456		—		13		469		6.0	%	113		—		13		126
Non US lines of credit	(d)	Variable		7		—		8		15		Variable		7		—		12		19
Non US term loans	(d)	Variable		334		—		35		369		Variable		564		—		19		583
Other long term debt	(e)	Variable		222		—		1		223		Variable		292		—		—		292
Capitalized interest				(13)		—		—		(13)				(93)		—		—		(93)
Totals				$	30,172	$	24	$	1,325	$	31,521			$	30,815	$	112	$	2,155	$	33,082

17

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

(a)    On June 22, 2020, in an unregistered offering through a private placement, Griffon completed the add-on offering of $150,000 principal amount of its 5.75% Senior Notes, at 100.25% of par, to Griffon's previously issued $850,000 principal amount of its 5.75% Senior Notes, at par, completed on February 19, 2020 (collectively, the “Senior Notes”). Proceeds from the Senior Notes were used to redeem the $1,000,000 of 5.25% 2022 senior notes. As of March 31, 2021, outstanding Senior Notes due totaled $1,000,000; interest is payable semi-annually on March 1 and September 1.

The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On April 22, 2020 and August 3, 2020, Griffon exchanged substantially all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933, as amended (the "Securities Act"), via an exchange offer. The fair value of the Senior Notes approximated $1,060,000 on March 31, 2021 based upon quoted market prices (level 1 inputs).

In connection with these transactions, Griffon capitalized $16,448 of underwriting fees and other expenses incurred related to the issuance and exchange of the 2028 Senior Notes, which is being amortized over the term of the 2028 Senior Notes. Furthermore, all of the obligations associated with the 2022 Senior Notes were discharged. Additionally, Griffon recognized a $7,925 loss on the early extinguishment of debt of the $1,000,000 principal amount of 2022 Senior Notes, comprised primarily of the write-off of $6,725 of remaining deferred financing fees, $607 of tender offer net premium expense and $593 of redemption interest expense.

(b)     On January 30, 2020, Griffon amended its revolving credit facility (as amended, the "Credit Agreement") to increase the maximum borrowing availability from $350,000 to $400,000, and extend its maturity date from March 22, 2021 to March 22, 2025 and modify certain other provisions of the facility. The facility includes a letter of credit sub-facility with a limit of $100,000; a multi-currency sub-facility of $200,000; and contains a customary accordion feature that permits us to request, subject to each lender's consent, an increase in the maximum aggregate amount that can be borrowed by up to an additional $100,000.

    Borrowings under the Credit Agreement may be repaid and re-borrowed at any time. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, plus an applicable margin, which adjusts based on financial performance. Current margins are 0.50% for base rate loans and 1.50% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio, as well as customary affirmative and negative covenants, and events of default. The negative covenants place limits on Griffon's ability to, among other things, incur indebtedness, incur liens, and make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all domestic assets of the Company and the guarantors, and a pledge of not greater than 65% of the equity interest in Griffon’s material, first-tier foreign subsidiaries. At March 31, 2021, there were $20,622 of outstanding borrowings under the Credit Agreement; outstanding standby letters of credit were $16,310; and $363,068 was available, subject to certain loan covenants, for borrowing at that date.

(c)    Two Griffon subsidiaries have finance leases outstanding for real estate located in Troy, Ohio and Ocala, Florida. The leases mature in 2021 and 2025, respectively, and bear interest at fixed rates of approximately 5.0% and 5.6%, respectively. The Troy, Ohio lease is secured by a mortgage on the real estate and is guaranteed by Griffon. The Ocala, Florida lease contains two five-year renewal options. At March 31, 2021, $15,907 was outstanding, net of issuance costs. Refer to Note 21- Leases for further details.

(d)     In November 2012, Garant G.P. (“Garant”), a Griffon wholly owned subsidiary, entered into a CAD 15,000 ($11,894 as of March 31, 2021) revolving credit facility. The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.41% LIBOR USD and 1.47% Bankers Acceptance Rate CDN as of March 31, 2021). The revolving facility matures in October 2022. Garant is required to maintain a certain minimum equity.  At March 31, 2021, there were no borrowings under the revolving credit facility with CAD 15,000 ($11,894 as of March 31, 2021) available for borrowing.

18

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

In July 2016, Griffon Australia Holdings Pty Ltd and its Australian subsidiaries (collectively, "Griffon Australia") entered into an AUD 29,625 term loan, AUD 20,000 revolver and AUD 10,000 receivable purchase facility agreement. The term loan requires quarterly principal payments of AUD 1,250 plus interest with a balloon payment of AUD 9,625 due upon maturity in March 2022, and accrues interest at Bank Bill Swap Bid Rate “BBSY” plus 1.95% per annum (2.01% at March 31, 2021). During fiscal 2020, the term loan balance was reduced by AUD 5,000, from AUD 23,375 to AUD 18,375 with proceeds from an AUD 5,000 increase in the commitment of the receivables purchase line from AUD 10,000 to AUD 15,000. As of March 31, 2021, the term loan had an outstanding balance of AUD 13,375 ($10,192 as of March 31, 2021). The revolving facility and receivable purchase facility mature in March 2022, but are renewable upon mutual agreement with the lender. The revolving facility and receivable purchase facility accrue interest at BBSY plus 1.9% and 1.35%, respectively, per annum (1.98% and 1.41%, respectively, at March 31, 2021). At March 31, 2021, there were no balances outstanding under the revolver and the receivable purchase facility. The revolver, receivable purchase facility and the term loan are all secured by substantially all of the assets of Griffon Australia and its subsidiaries. Griffon Australia is required to maintain a certain minimum equity level and is subject to a maximum leverage ratio and a minimum fixed charges cover ratio.

In July 2018, The AMES Companies UK Ltd and its subsidiaries (collectively, "AMES UK") entered into a GBP 14,000 term loan, GBP 4,000 mortgage loan and GBP 5,000 revolver. The term loan and mortgage loan require quarterly principal payments of GBP 438 and GBP 105 plus interest, respectively, and have balloon payments due upon maturity, July 2023, of GBP 7,088 and GBP 2,349, respectively. The Term Loan and Mortgage Loans each accrue interest at the GBP LIBOR Rate plus 1.8% ( 1.85% at March 31, 2021). The revolving facility matures in May 2021, but is renewable upon mutual agreement with the lender, and accrues interest at the Bank of England Base Rate plus 1.5% (1.60% as of March 31, 2021). As of March 31, 2021, the revolver had an outstanding balance of GBP $3,204 ($4,405 as of March 31, 2021) while the term and mortgage loan balances amounted to GBP 14,313 ($19,678 as of March 31, 2021). The revolver and the term loan are both secured by substantially all of the assets of AMES UK and its subsidiaries. AMES UK is subject to a maximum leverage ratio and a minimum fixed charges cover ratio. An invoice discounting arrangement was canceled and replaced by the above loan facilities.

(e)     Other long-term debt primarily consists of a loan with the Pennsylvania Industrial Development Authority, with the balance consisting of finance leases.

On March 13, 2019, Griffon's Employee Stock Ownership Plan entered into an agreement that refinanced a term loan with a bank with an internal loan from Griffon. The internal loan interest rate is fixed at 2.91%, matures in June 2033 and requires quarterly payments of principal, currently $635, and interest. The internal loan is secured by shares purchased with the proceeds of the loan. The amount outstanding on the internal loan at March 31, 2021 was $28,608.

At March 31, 2021, Griffon and its subsidiaries were in compliance with the terms and covenants of all credit and loan agreements.

NOTE 11 — SHAREHOLDERS’ EQUITY

During 2021, the Company paid a quarterly cash dividend of $0.08 per share in each quarter, totaling $0.16 per share for the six months ended March 31, 2021. During 2020, the Company paid a quarterly cash dividend of $0.075 per share, totaling $0.30 per share for the year. A dividend payable was established for the holders of restricted shares; such dividends will be released upon vesting of the underlying restricted shares.

On April 29, 2021, the Board of Directors declared a quarterly cash dividend of $0.08 per share, payable on June 17, 2021 to shareholders of record as of the close of business on May 20, 2021.

Compensation expense for restricted stock and restricted stock units is recognized ratably over the required service period based on the fair value of the grant, calculated as the number of shares granted multiplied by the stock price on the date of grant and, for performance shares, the likelihood of achieving the performance criteria. Compensation expense for restricted stock granted to two senior executives is calculated as the maximum number of shares granted, upon achieving certain performance criteria, multiplied by the stock price as valued by a Monte Carlo Simulation Model. Compensation cost related to stock-based awards

19

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

with graded vesting, generally over a period of three to four years, is recognized using the straight-line attribution method and recorded within SG&A expenses.

On January 29, 2016, shareholders approved the Griffon Corporation 2016 Equity Incentive Plan ("Incentive Plan") under which awards of performance shares, performance units, stock options, stock appreciation rights, restricted shares, restricted stock units, deferred shares and other stock-based awards may be granted. On January 31, 2018, shareholders approved Amendment No. 1 to the Incentive Plan pursuant to which, among other things, 1,000,000 shares were added to the Incentive Plan; and on January 30, 2020, shareholders approved Amendment No. 2 to the Incentive Plan, pursuant to which 1,700,000 shares were added to the Incentive Plan. Options granted under the Incentive Plan may be either “incentive stock options” or nonqualified stock options, generally expire ten years after the date of grant and are granted at an exercise price of not less than 100% of the fair market value at the date of grant. The maximum number of shares of common stock available for award under the Incentive Plan is 5,050,000 (600,000 of which may be issued as incentive stock options), plus (i) any shares reserved for issuance under the 2011 Equity Incentive Plan as of the effective date of the Incentive Plan, and (ii) any shares underlying awards outstanding on such effective date under the 2011 Incentive Plan that are canceled or forfeited. As of March 31, 2021, there were 437,276 shares available for grant.

During the first quarter of 2021, Griffon granted 511,624 shares of restricted stock and restricted stock units. This included 226,811 restricted stock and restricted stock units, subject to certain performance conditions, with vesting periods of three years, with a total fair value of $5,500, or a weighted average fair value of $24.25 per share. Furthermore, this included 284,813 restricted stock awards granted to five executives, with vesting periods of three years and a total fair value of $5,913 or a weighted average fair value of $20.76 per share.

During the second quarter of 2021, Griffon granted 731,282 shares of restricted stock to six executives. This included 203,282 shares of restricted stock to four executives, subject to certain performance conditions, with vesting periods ranging from 34 months to 60 months, with a total fair value of $4,923, or a weighted average fair value of $24.22 per share. This also included 528,000 shares of restricted stock granted to two senior executives with a vesting period of four years and a two-year post-vesting holding period, subject to the achievement of certain absolute and relative performance conditions relating to the price of Griffon's common stock. So long as the minimum performance condition is attained, the amount of shares that can vest will range from 384,000 to 528,000. The total fair value of these restricted shares using the Monte Carlo Simulation model is approximately $7,824, or a weighted average fair value of $14.82 per share. Additionally, Griffon granted 44,424 restricted shares to the non-employee directors of Griffon with a vesting period of three years and a fair value of $1,080, or a weighted average fair value of $24.31 per share.

The following table summarizes the Company’s compensation expense relating to all stock-based incentive plans:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Restricted stock	$	4,349	$	3,662	$	7,777	$	6,812
ESOP	944		658		1,724		1,490
Total stock based compensation	$	5,293	$	4,320	$	9,501	$	8,302

On each of August 3, 2016 and August 1, 2018, Griffon’s Board of Directors authorized the repurchase of up to $50,000 of Griffon’s outstanding common stock. Under this share repurchase program, the Company may purchase shares in the open market, including pursuant to a 10b5-1 plan, or in privately negotiated transactions. During the six months ended March 31, 2021, Griffon did not purchase any shares of common stock under these repurchase programs. As of March 31, 2021, an aggregate of $57,955 remains under Griffon's Board authorized repurchase programs.

During the second quarter ended March 31, 2021, no shares were withheld to settle employee taxes due upon the vesting of restricted stock. During the six months ended March 31, 2021, 133,027 shares, with a market value of $2,774, or $20.85 per share, respectively, were withheld to settle employee taxes due upon the vesting of restricted stock, and were added to treasury stock. Furthermore, during the six months ended March 31, 2021, an additional 6,507 shares, with a market value of $135, or

20

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

$20.75 per share, were withheld from common stock issued upon the vesting of restricted stock units to settle employee taxes due upon vesting.

NOTE 12 – EARNINGS PER SHARE (EPS)

Basic EPS was calculated by dividing income available to common shareholders by the weighted average number of shares of common stock outstanding during the period. Diluted EPS was calculated by dividing income available to common shareholders by the weighted average number of shares of common stock outstanding plus additional common shares that could be issued in connection with stock based compensation.

The following table is a reconciliation of the share amounts (in thousands) used in computing earnings per share:

	Three Months Ended March 31,		Six Months Ended March 31,
	2021	2020	2021	2020
Common shares outstanding	56,684	47,431	56,684	47,431
Unallocated ESOP shares	(1,961)	(2,159)	(1,961)	(2,159)
Non-vested restricted stock	(3,822)	(3,562)	(3,822)	(3,562)
Impact of weighted average shares	(63)	(145)	(184)	(341)
Weighted average shares outstanding - basic	50,838	41,565	50,717	41,369
Incremental shares from stock based compensation	2,426	2,169	2,494	2,457
Weighted average shares outstanding - diluted	53,264	43,734	53,211	43,826

NOTE 13 – BUSINESS SEGMENTS

Griffon reports its operations through three reportable segments, as follows:

•CPP conducts its operations through AMES. Founded in 1774, AMES is the leading North American manufacturer and a global provider of branded consumer and professional tools and products for home storage and organization, landscaping, and enhancing outdoor lifestyles. CPP sells products globally through a portfolio of leading brands including True Temper, AMES, and ClosetMaid.

•HBP conducts its operations through 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 CornellCookson brand.

•DE conducts its operations through Telephonics, founded in 1933, a globally recognized leading provider of highly sophisticated intelligence, surveillance and communications solutions for defense, aerospace and commercial customers.

21

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

Information on Griffon’s reportable segments is as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
REVENUE	2021		2020		2021		2020
Consumer and Professional Products	$	331,871	$	274,912	$	622,913	$	515,988
Home and Building Products	242,811		209,829		493,292		451,210
Defense Electronics	60,150		81,609		127,918		147,590
Total consolidated net sales	$	634,832	$	566,350	$	1,244,123	$	1,114,788

Disaggregation of Revenue

Revenue from contracts with customers is disaggregated by end markets, segments and geographic location, as it more accurately depicts the nature and amount of the Company’s revenue. The following table presents revenue disaggregated by end market and segment:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Residential repair and remodel	$	50,560	$	40,505	$	96,160	$	75,595
Retail	153,746		144,904		292,994		264,524
Residential new construction	14,540		14,884		28,055		29,857
Industrial	9,958		10,535		19,489		21,158
International excluding North America	103,067		64,084		186,215		124,854
Total Consumer and Professional Products	331,871		274,912		622,913		515,988
Residential repair and remodel	120,827		100,808		246,942		222,805
Commercial construction	94,751		86,300		190,690		178,187
Residential new construction	27,233		22,721		55,660		50,218
Total Home and Building Products	242,811		209,829		493,292		451,210
U.S. Government	35,045		53,623		82,369		96,324
International	21,497		25,021		38,392		43,554
Commercial	3,608		2,965		7,157		7,712
Total Defense Electronics	60,150		81,609		127,918		147,590
Total Consolidated Revenue	$	634,832	$	566,350	$	1,244,123	$	1,114,788

22

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

The following table presents revenue disaggregated by geography based on the location of the Company's customer:

	For the Three Months Ended March 31,
	2021								2020
	CPP		HBP		DE		Total		CPP		HBP		DE		Total
United States	$	205,368	$	230,955	$	34,166	$	470,489	$	191,412	$	199,060	$	55,071	$	445,543
Europe	38,965		41		5,791		44,797		24,737		5		9,880		34,622
Canada	21,778		9,797		1,925		33,500		17,515		7,867		4,209		29,591
Australia	63,691		—		122		63,813		39,032		—		189		39,221
All other countries	2,069		2,018		18,146		22,233		2,216		2,897		12,260		17,373
Consolidated revenue	$	331,871	$	242,811	$	60,150	$	634,832	$	274,912	$	209,829	$	81,609	$	566,350

	For the Six Months Ended March 31,
	2021								2020
	CPP		HBP		DE		Total		CPP		HBP		DE		Total
United States	$	388,810	$	467,486	$	81,544	$	937,840	$	351,570	$	426,010	$	101,214	$	878,794
Europe	52,121		41		12,696		64,858		31,342		28		15,865		47,235
Canada	43,893		21,285		3,754		68,932		35,296		19,120		6,783		61,199
Australia	133,231		—		441		133,672		93,260		—		795		94,055
All other countries	4,858		4,480		29,483		38,821		4,520		6,052		22,933		33,505
Consolidated revenue	$	622,913	$	493,292	$	127,918	$	1,244,123	$	515,988	$	451,210	$	147,590	$	1,114,788

Griffon evaluates performance and allocates resources based on each segment's operating results before interest income and expense, income taxes, depreciation and amortization, unallocated amounts (mainly corporate overhead), restructuring charges, loss from debt extinguishment and acquisition related expenses, as well as other items that may affect comparability, as applicable (“Segment adjusted EBITDA”). Griffon believes this information is useful to investors for the same reason. The following table provides a reconciliation of Segment adjusted EBITDA to Income before taxes:

23

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Segment adjusted EBITDA:
Consumer and Professional Products	$	37,423	$	25,027	$	70,136	$	46,953
Home and Building Products	40,060		30,635		88,429		71,336
Defense Electronics	2,220		4,248		7,805		8,723
Segment adjusted EBITDA	79,703		59,910		166,370		127,012
Unallocated amounts, excluding depreciation *	(11,922)		(11,947)		(23,949)		(23,889)
Adjusted EBITDA	67,781		47,963		142,421		103,123
Net interest expense	(15,527)		(16,561)		(31,172)		(32,511)
Depreciation and amortization	(15,883)		(15,719)		(31,149)		(31,544)
Loss from debt extinguishment	—		(6,690)		—		(6,690)
Restructuring charges	(7,562)		(3,104)		(18,362)		(9,538)
Acquisition costs	—		(2,960)		—		(2,960)
Gain (adjustment) on sale of SEG business	(949)		—		5,291		—
Income before taxes	$	27,860	$	2,929	$	67,029	$	19,880

* Unallocated amounts typically include general corporate expenses not attributable to a reportable segment.

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
DEPRECIATION and AMORTIZATION	2021		2020		2021		2020
Segment:
Consumer and Professional Products	$	8,620	$	8,222	$	16,819	$	16,453
Home and Building Products	4,379		4,668		8,720		9,468
Defense Electronics	2,734		2,676		5,410		5,320
Total segment depreciation and amortization	15,733		15,566		30,949		31,241
Corporate	150		153		200		303
Total consolidated depreciation and amortization	$	15,883	$	15,719	$	31,149	$	31,544
CAPITAL EXPENDITURES
Segment:
Consumer and Professional Products	$	6,813	$	3,800	$	13,720	$	7,532
Home and Building Products	1,998		3,556		4,113		11,495
Defense Electronics	3,247		1,921		6,151		3,210
Total segment	12,058		9,277		23,984		22,237
Corporate	2		70		2		282
Total consolidated capital expenditures	$	12,060	$	9,347	$	23,986	$	22,519

24

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

ASSETS	At March 31, 2021		At September 30, 2020
Segment assets:
Consumer and Professional Products	$	1,408,545	$	1,255,127
Home and Building Products	604,325		606,785
Defense Electronics	288,019		329,128
Total segment assets	2,300,889		2,191,040
Corporate	216,571		248,902
Total continuing assets	2,517,460		2,439,942
Assets of discontinued operations	6,820		8,497
Consolidated total	$	2,524,280	$	2,448,439

NOTE 14 – EMPLOYEE BENEFIT PLANS

Defined benefit pension expense (income) included in Other Income (Expense), net was as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Interest cost	$	745	$	1,151	$	1,489	$	2,302
Expected return on plan assets	(2,545)		(2,586)		(5,089)		(5,172)
Amortization:
Prior service cost	—		4		—		8
Recognized actuarial loss	1,573		1,042		3,146		2,084
Net periodic expense (income)	$	(227)	$	(389)	$	(454)	$	(778)

NOTE 15 – RECENT ACCOUNTING PRONOUNCEMENTS

Issued but not yet effective accounting pronouncements

In August 2018, the Financial Accounting Standards Board ("FASB") issued guidance to clarify disclosure requirements related to defined benefit pension and other post-retirement plans. The guidance is effective for fiscal years beginning after December 15, 2020, with early adoption permitted, and is effective for the Company in our fiscal year beginning in October 1, 2021. We are currently evaluating the effects that the adoption of this guidance will have on our the related pension disclosures.

In December 2019, the FASB issued guidance on simplifying the accounting for income taxes by clarifying and amending existing guidance related to the recognition of franchise tax, the evaluation of a step up in the tax basis of goodwill, and the effects of enacted changes in tax laws or rates in the effective tax rate computation, among other clarifications. Our effective date for adoption of this Accounting Standards Update ("ASU") is our fiscal year beginning October 1, 2021 with early adoption permitted. We are currently evaluating the effects that the adoption of this guidance will have on our consolidated financial statements and the related disclosures.

New Accounting Standards Implemented

In April 2019, the FASB issued guidance relating to accounting for credit losses on financial instruments, including trade receivables, and derivatives and hedging. This guidance is effective for the Company beginning in fiscal 2021. Adoption of this standard did not have a material impact on our consolidated financial statements and the related disclosures.

In August 2018, the FASB issued guidance which modifies the disclosures on fair value measurements by removing the requirement to disclose the amount and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy and the policy for timing of such transfers. This guidance expands the disclosure requirements for Level 3 fair value measurements,

25

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

primarily focused on changes in unrealized gains and losses included in other comprehensive income (loss). This guidance is effective for the Company beginning in fiscal 2021. Adoption of this standard did not have a material impact on our consolidated financial statements and the related disclosures.

In March 2020, the SEC adopted amendments to the financial disclosure requirements for guarantors and issuers of guaranteed securities registered or being registered in Rule 3-10 of Regulation S-X, and affiliates whose securities collateralize securities registered or being registered in Rule 3-16 of Regulation S-X (SEC Release No. 33-10762). The amendment replaces the requirement to present condensed consolidating financial statements, comprised of balance sheets and statements of operations, comprehensive income and cash flows for all periods presented, with summarized financial information of the guarantor only for the most recently completed fiscal year and any subsequent interim period. We adopted the amendments to the disclosure requirements during the first quarter of fiscal 2021. This amendment did not have an impact on our consolidated financial statements as this amendment simplifies the financial disclosures required in our guarantor and non-guarantor financial information. See Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations—Supplemental Guarantor Financial Information.

The Company has implemented all new accounting pronouncements that are in effect and that may impact its financial statements, and does not believe that there are any other new accounting pronouncements that have been issued that might have a material impact on its financial position or results of operations.

NOTE 16 – DISCONTINUED OPERATIONS

The following amounts summarize the total assets and liabilities related to the Installation Services and other discontinued activities which have been segregated from Griffon’s continuing operations, and are reported as assets and liabilities of discontinued operations in the Condensed Consolidated Balance Sheets:

	At March 31, 2021		At September 30, 2020
Assets of discontinued operations:
Prepaid and other current assets	$	1,525	$	2,091
Other long-term assets	5,295		6,406
Total assets of discontinued operations	$	6,820	$	8,497
Liabilities of discontinued operations:
Accrued liabilities, current	$	4,600	$	3,797
Other long-term liabilities	6,415		7,014
Total liabilities of discontinued operations	$	11,015	$	10,811

At March 31, 2021, Griffon's assets and liabilities consist primarily of insurance claims, income tax, product liability, and warranty and environmental reserves.

NOTE 17 – RESTRUCTURING CHARGES

In November 2019, Griffon announced the development of a next-generation business platform for CPP to enhance the growth, efficiency, and competitiveness of its U.S. operations, and on November 12, 2020, Griffon announced that CPP is broadening this strategic initiative to include additional North American facilities, the AMES UK and Australia businesses, and a manufacturing facility in China.

The expanded focus of this initiative leverages the same three key development areas being executed within our U.S. operations. First, certain AMES global operations will be consolidated to optimize facilities footprint and talent. Second, strategic investments in automation and facilities expansion will be made to increase the efficiency of our manufacturing and fulfillment operations, and support e-commerce growth. Third, multiple independent information systems will be unified into a single data and analytics platform, which will serve the whole AMES global enterprise.

26

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

Expanding the roll-out of the new business platform from our AMES U.S. operations to include AMES’ global operations will extend the duration of the project by one year, with completion now expected by the end of calendar year 2023. When fully implemented, these actions will result in annual cash savings of $30,000 to $35,000 and a reduction in inventory of $30,000 to $35,000, both based on fiscal 2020 operating levels.

The cost to implement this new business platform, over the duration of the project, will include one-time charges of approximately $65,000 and capital investments of approximately $65,000. The one-time charges are comprised of $46,000 of cash charges, which includes $26,000 of personnel-related costs such as training, severance, and duplicate personnel costs as well as $20,000 of facility and lease exit costs. The remaining $19,000 of charges are non-cash and are primarily related to asset write-downs.

In the quarter and six months ended March 31, 2021, CPP incurred pre-tax restructuring and related exit costs approximating $7,502 and $10,581, respectively. During the six months ended March 31, 2021, cash charges totaled $7,891 and non-cash, asset-related charges totaled $2,690; the cash charges included $1,084 for one-time termination benefits and other personnel-related costs and $6,807 for facility and lease exit costs primarily driven by the consolidation of distribution facilities. Non-cash charges of $2,690 predominantly related to inventory that have no recoverable value. During the six months ended March 31, 2021, headcount was reduced by 65.

In the quarter and six months ended March 31, 2020, CPP incurred pre-tax restructuring and related exit costs approximating $3,104 and $9,538, respectively. During the six months ended March 31, 2020, cash charges totaled $4,846 and non-cash, asset-related charges totaled $4,692; the cash charges included $3,792 for one-time termination benefits and other personnel-related costs and $1,054 for facility exit costs. Non-cash charges included a $1,968 impairment charge related to a facility's operating lease as well as $671 of leasehold improvements made to the leased facility and $304 of inventory that have no recoverable value, and a $1,749 impairment charge related to machinery and equipment that have no recoverable value at one of the Company's owned manufacturing locations.

In September 2020, the DE Voluntary Employee Retirement Plan was initiated, which was subsequently followed by a reduction in force in November 2020, to improve efficiencies by combining functions and responsibilities. The combined actions resulted in severance charges of approximately $4,300, with $2,120 recognized in the fourth quarter of fiscal 2020, and the remaining $2,180 was recognized during the six months ended March 31, 2021. These actions reduced headcount by approximately 90 people.

In addition, charges of $5,601 were recorded during the quarter ended December 31, 2020, primarily related to exiting our older weather radar product lines.

A summary of the restructuring and other related charges included in Cost of goods and services and SG&A expenses in the Company's Condensed Consolidated Statements of Operations were as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Cost of goods and services	$	3,337	$	1,353	$	9,762	$	4,076
Selling, general and administrative expenses	4,225		1,751		8,600		5,462
Total restructuring charges	$	7,562	$	3,104	$	18,362	$	9,538

27

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Personnel related costs	$	782	$	1,658	$	3,264	$	3,792
Facilities, exit costs and other	4,283		914		6,807		1,054
Non-cash facility and other	2,497		532		8,291		4,692
Total	$	7,562	$	3,104	$	18,362	$	9,538

The following table summarizes the accrued liabilities of the Company's restructuring actions:

	Cash Charges				Non-Cash
	Personnel related costs		Facilities & Exit Costs		Facility and Other Costs		Total
Accrued liability at September 30, 2020	$	2,701	$	264	$	—	$	2,965
Q1 Restructuring charges	2,482		2,524		5,794		10,800
Q1 Cash payments	(1,598)		(2,534)		—		(4,132)
Q1 Non-cash charges	—		—		(5,794)		(5,794)
Accrued liability at December 31, 2020	$	3,585	$	254	$	—	$	3,839
Q2 Restructuring charges	782		4,283		2,497		7,562
Q2 Cash payments	(3,840)		(4,273)		—		(8,113)
Q2 Non-cash charges	—		—		(2,497)		(2,497)
Accrued liability at March 31, 2021	$	527	$	264	$	—	$	791

NOTE 18 – OTHER INCOME (EXPENSE)

For the quarters ended March 31, 2021 and 2020, Other income (expense) of $847 and $615, respectively, includes $320 and $745, respectively, of net currency exchange gains in connection with the translation of receivables and payables denominated in currencies other than the functional currencies of Griffon and its subsidiaries, net periodic benefit plan income of $227 and $389, respectively, as well as $55 and $(230), respectively, of net investment income (loss).

For the six months ended March 31, 2021 and 2020, Other income (expense) of $806 and 1,393 includes $(379) and $369, respectively, of net currency exchange gains (losses) in connection with the translation of receivables and payables denominated in currencies other than the functional currencies of Griffon and its subsidiaries, net periodic benefit plan income of $454 and $778, respectively, as well as $386 and $(149), respectively, of net investment income (loss). Additionally, Other income (expense) also includes a one-time technology recognition award for $700.

NOTE 19 – WARRANTY LIABILITY

DE offers warranties against product defects for periods generally ranging from one to two years, depending on the specific product and terms of the customer purchase agreement. CPP and HBP also offer warranties against product defects for periods generally ranging from one to ten years, with limited lifetime warranties on certain door models. Typical warranties require CPP, HBP and DE to repair or replace the defective products during the warranty period at no cost to the customer. At the time revenue is recognized, Griffon records a liability for warranty costs, estimated based on historical experience, and periodically assesses its warranty obligations and adjusts the liability as necessary. CPP offers an express limited warranty for a period of ninety days on all products from the date of original purchase unless otherwise stated on the product or packaging from the date of original purchase.

28

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

Changes in Griffon’s warranty liability, included in Accrued liabilities, were as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Balance, beginning of period	$	10,834	$	7,344	$	10,843	$	7,894
Warranties issued and changes in estimated pre-existing warranties	6,477		4,862		11,216		8,227
Actual warranty costs incurred	(4,633)		(4,417)		(9,381)		(8,332)
Balance, end of period	$	12,678	$	7,789	$	12,678	$	7,789

NOTE 20 – OTHER COMPREHENSIVE INCOME (LOSS)

The amounts recognized in other comprehensive income (loss) were as follows:

	For the Three Months Ended March 31,
	2021						2020
	Pre-tax		Tax		Net of tax		Pre-tax		Tax		Net of tax
Foreign currency translation adjustments	$	1,739	$	—	$	1,739	$	(16,471)	$	—	$	(16,471)
Pension and other defined benefit plans	1,585		(340)		1,245		847		(178)		669
Cash flow hedges	2,559		(768)		1,791		1,383		(415)		968
Total other comprehensive income (loss)	$	5,883	$	(1,108)	$	4,775	$	(14,241)	$	(593)	$	(14,834)

	For the Six Months Ended March 31,
	2021						2020
	Pre-tax		Tax		Net of tax		Pre-tax		Tax		Net of tax
Foreign currency translation adjustments	$	13,862	$	—	$	13,862	$	(10,001)	$	—	$	(10,001)
Pension and other defined benefit plans	3,735		(784)		2,951		1,694		(353)		1,341
Cash flow hedges	1,576		(473)		1,103		953		(286)		667
Total other comprehensive income (loss)	$	19,173	$	(1,257)	$	17,916	$	(7,354)	$	(639)	$	(7,993)

The components of Accumulated other comprehensive income (loss) are as follows:

	At March 31, 2021		At September 30, 2020
Foreign currency translation adjustments	$	(11,821)	$	(25,683)
Pension and other defined benefit plans	(43,647)		(46,598)
Change in Cash flow hedges	1,292		189
	$	(54,176)	$	(72,092)

29

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

Amounts reclassified from accumulated other comprehensive income (loss) to income were as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
Gain (Loss)	2021		2020		2021		2020
Pension amortization	$	(1,573)	$	(1,046)	$	(3,146)	$	(2,092)
Cash flow hedges	(1,741)		1,050		(2,399)		994
Total gain (loss)	$	(3,314)	$	4	(5,545)		(1,098)
Tax benefit (expense)	696		(1)		1,165		231
Total	$	(2,618)	$	3	$	(4,380)	$	(867)

NOTE 21 — LEASES

The Company recognizes right-of-use ("ROU") assets and lease liabilities on the balance sheet, with the exception of leases with a term of twelve months or less. The Company determines if an arrangement is a lease at inception. The ROU assets and short and long-term liabilities associated with our Operating leases are shown as separate line items on our Condensed Consolidated Balance Sheets. Finance leases are included in property, plant, and equipment, net, other accrued liabilities, and other non-current liabilities. The Company's finance leases are immaterial. ROU assets, along with any other related long-lived assets, are periodically evaluated for impairment.

ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. We use the implicit rate when readily determinable. Our determination of the lease term may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option.

For operating leases, fixed lease payments are recognized as operating lease cost on a straight-line basis over the lease term. For finance leases and impaired operating leases, the ROU asset is depreciated on a straight-line basis over the remaining lease term, along with recognition of interest expense associated with accretion of the lease liability. For leases with a lease term of 12 months or less (a "Short-term" lease), any fixed lease payments are recognized on a straight-line basis over such term, and are not recognized on the Condensed Consolidated Balance Sheets. Variable lease cost for both operating and finance leases, if any, is recognized as incurred. The Company has lease agreements that contain both lease and non-lease components. For real estate leases, we account for lease components together with non-lease components (e.g., common-area maintenance). Components of operating lease costs are as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Fixed	$	9,970	$	9,187	$	20,010	$	18,739
Variable (a), (b)	2,087		1,823		4,134		3,576
Short-term (b)	1,053		1,393		2,167		2,823
Total	$	13,110	$	12,403	$	26,311	$	25,138

(a) Primarily relates to common-area maintenance and property taxes.

(b) Not recorded on the balance sheet.

30

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

Supplemental cash flow information were as follows:

	For the Six Months Ended March 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	22,099	$	21,582
Financing cash flows from finance leases	1,865		1,940
Total	$	23,964	$	23,522

Supplemental Condensed Consolidated Balance Sheet information related to leases were as follows:

	March 31, 2021		September 30, 2020
Operating Leases:
Right of use assets:
Operating right-of-use assets	$	154,929	$	161,627
Lease Liabilities:
Current portion of operating lease liabilities	$	30,685	$	31,848
Long-term operating lease liabilities	128,714		136,054
Total operating lease liabilities	$	159,399	$	167,902
Finance Leases:
Property, plant and equipment, net(1)	$	18,068	$	18,774
Lease Liabilities:
Notes payable and current portion of long-term debt	$	3,110	$	3,352
Long-term debt, net	14,950		15,339
Total financing lease liabilities	$	18,060	$	18,691

(1) Finance lease assets are recorded net of accumulated depreciation of $4,296 and $2,383 as of March 31, 2021 and September 30, 2020, respectively.

31

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

Two Griffon subsidiaries have finance leases outstanding for real estate located in Troy, Ohio and Ocala, Florida. The leases mature in 2021 and 2025, respectively, and bear interest at fixed rates of approximately 5.0% and 5.6%, respectively. The Troy, Ohio lease is secured by a mortgage on the real estate and is guaranteed by Griffon. The Ocala, Florida lease contains two five-year renewal options. As of March 31, 2021 and September 30, 2020, $15,907 and $17,188, respectively, was outstanding, net of issuance costs. The remaining lease liability balance relates to finance equipment leases.

The aggregate future maturities of lease payments for operating leases and finance leases as of March 31, 2021 are as follows (in thousands):

	Operating Leases		Finance Leases
2020(a)	$	19,128	$	2,381
2021	34,484		3,087
2022	26,884		2,749
2023	20,180		2,195
2024	18,214		2,077
2025	12,376		2,075
Thereafter	63,859		7,777
Total lease payments	195,125		22,341
Less: Imputed Interest	(35,726)		(4,281)
Present value of lease liabilities	$	159,399	$	18,060

(a) Excluding the six months ended March 31, 2021.

Average lease terms and discount rates at March 31, 2021 were as follows:

Weighted-average remaining lease term (years)
Operating leases	8.1
Finance Leases	8.2
Weighted-average discount rate
Operating Leases	4.45	%
Finance Leases	5.50	%

NOTE 22 — COMMITMENTS AND CONTINGENCIES

Legal and environmental

Peekskill Site. Lightron Corporation (“Lightron”), a wholly-owned subsidiary of Griffon, once conducted operations at a location in the Town of Cortlandt, New York, just outside the city of Peekskill, New York (the “Peekskill Site”) owned by ISC Properties, Inc. (“ISCP”), a wholly-owned subsidiary of Griffon. ISCP sold the Peekskill Site in November 1982.

Subsequently, ISCP was advised by the Department of Environmental Conservation of New York State (the "DEC") that sampling at the Peekskill Site and in a creek near the Peekskill Site indicated concentrations of solvents and other chemicals common to prior plating operations by a Lightron subsidiary. In 1996, ISCP entered into a consent order with the DEC (the “Consent Order”), pursuant to which ISCP was required to perform a remedial investigation and prepare a feasibility study (the “Feasibility Study”). After completing the initial remedial investigation, ISCP conducted supplemental remedial investigations over the next several years, including soil vapor investigations, as required by the Consent Order.

32

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

In April 2009, the DEC advised ISCP that both the DEC and the New York State Department of Health had reviewed and accepted an August 2007 Remedial Investigation Report and an Additional Data Collection Summary Report dated January 30, 2009. ISCP submitted to the DEC a draft Feasibility Study which was accepted and approved by the DEC in February 2011. ISCP satisfied its obligations under the Consent Order when DEC approved the Remedial Investigation and Feasibility Study for the Peekskill Site. In June 2011 the DEC issued a Record of Decision that set forth a Remedial Action Plan for the Peekskill Site that identified the specific remedies selected and responded to public comments. The cost of the remedy proposed by DEC in its Remedial Action Plan was approximately $10,000.

Following issuance of the Remedial Action Plan, the DEC implemented a portion of its plan, and also performed additional investigation for the presence of metals in soils and sediments downstream from the Peekskill Site. During this investigation metals were found to be present in sediments further downstream from the Peekskill site than previously detected.

In August 2018, the DEC sent a letter to the United States Environmental Protection Agency (the “EPA”), in which the DEC requested that the Peekskill Site be nominated by the EPA for inclusion on the National Priorities List under CERCLA (the “NPL”). Based on the DEC’s request and an analysis by a consultant retained by the EPA, on May 15, 2019 the EPA added the Peekskill Site to the NPL and has since announced that it is performing a Remedial Investigation/Feasibility Study. On August 25, 2020, the EPA sent a letter to several parties, including Lightron and ISCP, requesting that each such party inform the EPA as to whether it would be willing to enter into discussions regarding implementation of a Remedial Investigation/Feasibility Study (“RI/FS”). The EPA also sent a request for information to each party under Section 104(e) of CERCLA. Lightron and ISCP have informed the EPA that they are willing to participate in discussions regarding implementation of the RI/FS. Lightron and ISCP have also submitted responses to certain items contained in the Section 104(e) information request, with additional responses to follow. The current owner of the property, which acquired the Peekskill Site from ISCP in 1982 and has no relationship with Lightron or ISCP, has also informed the EPA that it is willing to discuss implementation of the RI/FS, and has also received, and submitted certain information in response to, a Section 104(e) information request. The EPA may decide to implement the RI/FS, on its own or through the use of consultants, may reach agreement with one or more parties to perform the RI/FS, or may offer to negotiate with one or more parties to accept a settlement addressing the potential liability of such parties for investigation and/or remediation at the Peekskill Site. Should the EPA implement the RI/FS, or perform further studies and/or subsequently remediate the site, without first reaching agreement with one or more relevant parties, the EPA would likely seek reimbursement for the costs incurred from such parties.

Lightron has not engaged in any operations in over three decades. ISCP functioned solely as a real estate holding company, and has not held any real property in over three decades. Griffon does not acknowledge any responsibility to perform any investigation or remediation at the Peekskill Site.

Union Fork and Hoe, Frankfort, NY site. The former Union Fork and Hoe property in Frankfort, New York was acquired by AMES in 2006 as part of a larger acquisition, and has historic site contamination involving chlorinated solvents, petroleum hydrocarbons and metals. AMES entered into an Order on Consent with the New York State Department of Environmental Conservation (“DEC”). While the Order is without admission or finding of liability or acknowledgment that there has been a release of hazardous substances at the site, the Order required Ames to perform a remedial investigation of certain portions of the property and to recommend a remediation option. In 2011, remediation of chlorinated solvents in the groundwater was completed to the satisfaction of DEC. In 2018, Ames submitted a Feasibility Study recommending that the remaining soil contamination involving metals and petroleum be covered, excavated and removed to a licensed off-site location or placed under a cover on-site. DEC approved the selection of this remedy in 2019 by issuing a Record of Decision (“ROD”). In June 2020, Ames completed the remediation required by the ROD and filed a Construction Completion Report, a Site Management Plan and an environmental easement with DEC. While Ames was implementing the remediation required by the ROD, DEC requested additional investigation of a small area on the site and of an area adjacent to the site perimeter. Ames investigated the on-site area and has completed remediation of that small area under a workplan approved by DEC. At the request of DEC, Ames has also submitted a workplan to investigate the areas adjacent to the site perimeter. AMES has a number of defenses to liability in this matter, including its rights under a previous Consent Judgment entered into between DEC and a predecessor of AMES relating to the site. Ames’ insurer has accepted Ames’ claim for a substantial portion of the costs incurred and to be incurred for both the on-site and off-site activities.

33

GRIFFON CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(US dollars and non US currencies in thousands, except per share data)

(Unaudited)

(Unless otherwise indicated, references to years or year-end refer to Griffon’s fiscal period ending September 30)

U.S. Government investigations and claims

Defense contracts and subcontracts, including Griffon’s contracts and subcontracts, are subject to audit and review by various agencies and instrumentalities of the United States government, including among others, the Defense Contract Audit Agency, the Defense Criminal Investigative Service, and the Department of Justice which has responsibility for asserting claims on behalf of the U.S. Government.

In general, departments and agencies of the U.S. Government have the authority to investigate various transactions and operations of Griffon, and the results of such investigations may lead to administrative, civil or criminal proceedings, the ultimate outcome of which could be fines, penalties, repayments or compensatory or treble damages. U.S. Government regulations provide that certain findings against a contractor may lead to suspension or debarment from future U.S. Government contracts or the loss of export privileges for a company or an operating division or subdivision. Suspension or debarment could have a material adverse effect on Telephonics because of its reliance on government contracts.

General legal

Griffon is subject to various laws and regulations relating to the protection of the environment and is a party to legal proceedings arising in the ordinary course of business. Management believes, based on facts presently known to it, that the resolution of the matters above and such other matters will not have a material adverse effect on Griffon’s consolidated financial position, results of operations or cash flows.

34

(Unless otherwise indicated, US dollars and non US currencies are in thousands, except per share data)

Item 2 - Management’s Discussion and Analysis of Financial Condition and Results of Operations

BUSINESS

Overview

Griffon Corporation (the “Company”, “Griffon”, "we" or "us") is a diversified management and holding company that conducts business through wholly-owned subsidiaries. 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).

Business Strategy

We own and operate, and seek to acquire, businesses in multiple industries and geographic markets. Our objective is to maintain leading positions in the markets we serve by providing innovative, branded products with superior quality and industry-leading service. We place emphasis on our iconic and well-respected brands, which helps to differentiate us and our offerings from our competitors and strengthens our relationship with our customers and those who ultimately use our products.

Through operating a diverse portfolio of businesses, we expect to reduce variability caused by external factors such as market cyclicality, seasonality, and weather. We achieve diversity by providing various product offerings and brands through multiple sales and distribution channels and conducting business across multiple countries which we consider our home markets.

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 in connection with divestitures. As long-term investors, having substantial experience in a variety of industries, our intent is to continue the growth and strengthening of our existing businesses, and to diversify further through investments in our businesses and through acquisitions.

Over the past three years, we have undertaken a series of transformative transactions. We divested our specialty plastics business in 2018 to focus on our core markets and improve our free cash flow conversion. Also in 2018, we expanded the scope of The AMES Companies, Inc. ("AMES") and Clopay Corporation ("Clopay") through the acquisitions of ClosetMaid, LLC ("ClosetMaid") and CornellCookson, Inc. ("CornellCookson"), respectively. CornellCookson has been integrated into Clopay, so that our leading company in residential garage doors and sectional commercial doors now includes a leading manufacturer of rolling steel doors and grille products. ClosetMaid was combined with AMES, and we established an integrated headquarters for AMES in Orlando, Florida. AMES is now positioned to fulfill its mission of Bringing Brands Together™ with the leading brands in home and garage organization, outdoor décor, and lawn, garden and cleaning tools. As a result of the expanded scope of the AMES and Clopay businesses, in 2019 we began reporting each as a separate segment. Griffon now reports its operations through three segments. Clopay remains in the Home and Building Products ("HBP") segment, AMES now constitutes our new Consumer and Professional Products ("CPP") segment and our Defense Electronics segment which continues to consist of Telephonics Corporation.

Update of COVID-19 on Our Business

The health and safety of our employees, our customers and their families is a high priority for Griffon. As of the date of this filing, all of Griffon's facilities are fully operational. We have implemented a variety of new policies and procedures, including additional cleaning, social distancing, staggered shifts and prohibiting or significantly restricting on-site visitors, to minimize the risk to our employees of contracting COVID-19. We manufacture a substantial majority of the products that we sell, with the majority of our manufacturing activities conducted in the United States. As a result, we have been able to mitigate the adverse impact of the COVID-19 pandemic on the global supply chain.

During the six months ended March 31, 2021 and through the date of this filing, all of our businesses have experienced normal or better order patterns compared with the same time period last year. Our supply chains have not experienced significant disruption, and at this time we do not anticipate any such significant disruption in the near term. Most U.S. states lifted initial executive orders issued during the 2020 calendar year requiring all workers to remain at home unless their work is critical, essential, or life-sustaining. Regardless, we believe that, based on the various standards published to date, the work our employees are performing are either critical, essential and/or life-sustaining for the following reasons: 1) Our Defense Electronics segment ("DE") is a defense and national security-related operation supporting the U.S. Government, with a portion of its business being directly with the U.S. Government; 2) HBP residential and commercial garage doors, rolling steel doors and related products that (a) provide protection and support for the efficient and safe movement of people, goods, and

35

equipment in and out of residential and commercial facilities, (b) help prevent fires from spreading from one location to another, and (c) protect warehouses and homes, and their contents, from damage caused by strong weather events such as hurricanes and tornadoes; and 3) CPP tools and storage products provide critical support for the national infrastructure including construction, maintenance, manufacturing and natural disaster recovery, and is part of the essential supply base to many of its largest customers including Home Depot, Lowe's and Menards. Our AMES international facilities are currently fully operational, as they meet the applicable standards in their respective countries.

Griffon believes it has adequate liquidity to invest in its existing businesses and execute its business plan, while managing its capital structure on both a short-term and long-term basis. In January 2020, Griffon increased total borrowing capacity under its revolving credit facility ("Credit Agreement") by $50,000, to $400,000 (of which $363,068 was available at March 31, 2021), and extended maturity of the facility to 2025. In addition, the Credit Agreement has a $100,000 accordion feature (subject to lender consent). In February 2020, Griffon refinanced $850,000 of its $1,000,000 of senior notes due 2022 with new 5.75% senior notes with a maturity of 2028, and in June 2020 refinanced the remaining $150,000 under the same terms and indenture as the $850,000 senior notes due 2028. In August 2020, we completed a public offering of 8,700,000 shares of our common stock for total net proceeds of $178,165 (the "Public Offering"); a portion of these net proceeds were used to repay outstanding borrowing under our Credit Agreement. At March 31, 2021 Griffon had cash and equivalents of $175,564.

We will continue to actively monitor the situation and may take further actions that impact our operations as may be required by federal, state or local authorities or that we determine are in the best interests of our employees, customers, suppliers and shareholders. While we are unable to determine or predict the nature, duration or scope of the overall impact the COVID-19 pandemic will have on our businesses, results of operations, liquidity or capital resources, we believe it is important to discuss where our company stands today, how our response to COVID-19 is progressing and how our operations and financial condition may change as the fight against COVID-19 progresses.

Business Highlights

In August 2020, we completed a public offering of 8,700,000 shares of our common stock for total net proceeds of $178,165; a portion of these proceeds were used to repay outstanding borrowing under our Credit Agreement. The Company intends to use the remainder of the proceeds for general corporate purposes, including to expand its current business through acquisitions of, or investments in, other businesses or products.

On February 19, 2020, Griffon issued, at par, $850,000 of 5.75% Senior Notes due in 2028 (the “2028 Senior Notes”) and on June 8, 2020 Griffon issued an additional $150,000 of 2028 Senior Notes at 100.25% of par under the same indenture. Proceeds from the 2028 Senior Notes were used to redeem the $1,000,000 of 5.25% Senior Notes due 2022.

In November 2019, Griffon announced the development of a next-generation business platform for CPP to enhance the growth, efficiency, and competitiveness of its U.S. operations, and on November 12, 2020, Griffon announced that CPP is broadening this strategic initiative to include additional North American facilities, the AMES UK and Australia businesses, and a manufacturing facility in China.

The expanded focus of this initiative leverages the same three key development areas being executed within our U.S. operations. First, certain AMES global operations will be consolidated to optimize facilities footprint and talent. Second, strategic investments in automation and facilities expansion will be made to increase the efficiency of our manufacturing and fulfillment operations, and support e-commerce growth. Third, multiple independent information systems will be unified into a single data and analytics platform, which will serve the whole AMES global enterprise.

Expanding the roll-out of the new business platform from our AMES U.S. operations to include AMES’ global operations will extend the duration of the project by one year, with completion now expected by the end of calendar year 2023. When fully implemented, these actions will result in annual cash savings of $30,000 to $35,000 and a reduction in inventory of $30,000 to $35,000, both based on fiscal 2020 operating levels.

The cost to implement this new business platform, over the duration of the project, will include one-time charges of approximately $65,000 and capital investments of approximately $65,000. The one-time charges are comprised of $46,000 of cash charges, which includes $26,000 of personnel-related costs such as training, severance, and duplicate personnel costs as well as $20,000 of facility and lease exit costs. The remaining $19,000 of charges are non-cash and are primarily related to asset write-downs.

In June 2018, Clopay acquired CornellCookson, a leading provider of rolling steel service doors, fire doors, and grilles, for an effective purchase price of approximately $170,000. This transaction strengthened Clopay's strategic portfolio with a line of

36

commercial rolling steel door products to complement Clopay's sectional door offerings in the commercial sector, and expands the Clopay network of professional dealers focused on the commercial market. CornellCookson generated over $200,000 in revenue in its first full year of operations.

In March 2018, we announced the combination of the ClosetMaid operations with those of AMES. ClosetMaid generated over $300,000 in revenue in the first twelve months after the acquisition, and we anticipate the integration with AMES will unlock additional value given the complementary products, customers, warehousing and distribution, manufacturing, and sourcing capabilities of the two businesses.

In February 2018, we closed on the sale of our Clopay Plastics Products ("Plastics") business to Berry Global, Inc. ("Berry") for approximately $465,000, net of certain post-closing adjustments, thus exiting the specialty plastics industry that the Company had entered when it acquired Clopay Corporation in 1986. This transaction provided immediate liquidity and positions the Company to improve its cash flow conversion given the historically higher capital needs of the Plastics operations as compared to Griffon’s remaining businesses.

In October 2017, we acquired ClosetMaid from Emerson Electric Co. (NYSE:EMR) for an effective purchase price of approximately $165,000. ClosetMaid, founded in 1965, is a leading North American manufacturer and marketer of wood and wire closet organization, general living storage and wire garage storage products, and sells to some of the largest home center retail chains, mass merchandisers, and direct-to-builder professional installers in North America. We believe that ClosetMaid is the leading brand in its category, with excellent consumer recognition.

We believe these actions have established a solid foundation for continuing organic growth in sales, profit, and cash generation and bolsters Griffon’s platforms for opportunistic strategic acquisitions.

Other Acquisitions and Dispositions

On December 22, 2020, AMES acquired Quatro Design Pty Ltd (“Quatro”), a leading Australian manufacturer and supplier of glass fiber reinforced concrete landscaping products for residential, commercial, and public sector projects for a purchase price of AUD $3,500 (approximately $2,700). The purchase price is subject to additional contingent consideration of approximately AUD $1,000 (approximately $760) based on Quatro exceeding certain EBITDA performance targets in the first year. Quatro is expected to contribute approximately $5,000 in annualized revenue in the first twelve months after the acquisition.

On December 18, 2020, Defense Electronics completed the sale of its Systems Engineering Group, Inc. (“SEG”) business for $15,000. SEG provides sophisticated, highly technical engineering and analytical support to the Missile Defense Agency and various U.S. military commands. SEG had sales of approximately $7,000 for the first fiscal quarter ended December 31, 2020 and $31,000 for the fiscal year ended September 30, 2020.

On November 29, 2019, AMES acquired Vatre Group Limited ("Apta"), a leading United Kingdom supplier of innovative garden pottery and associated products sold to leading UK and Ireland garden centers for approximately $10,500 (GBP 8,750), inclusive of a post-closing working capital adjustment, net of cash acquired. This acquisition broadens AMES' product offerings in the UK market and increases its in-country operational footprint. Apta contributed approximately $20,000 in revenue in the first twelve months after the acquisition.

On February 13, 2018, AMES acquired Kelkay, a leading United Kingdom manufacturer and distributor of decorative outdoor landscaping products sold to garden centers, retailers and grocers in the UK and Ireland. This acquisition broadened AMES' product offerings in the market and increased its in-country operational footprint.

In November 2017, Griffon acquired Harper Brush Works, a leading U.S. manufacturer of cleaning products for professional, home, and industrial use, from Horizon Global (NYSE:HZN). This acquisition expanded the AMES line of long-handle tools in North America to include brooms, brushes, and other cleaning products.

During fiscal 2017, Griffon also completed a number of other acquisitions to expand and enhance AMES' global footprint. In the United Kingdom, Griffon acquired La Hacienda, an outdoor living brand of unique heating and garden décor products, in July 2017. The acquisition of La Hacienda, together with the February 2018 acquisition of Kelkay and November 2020 acquisition of Apta, provides AMES with additional brands and a platform for growth in the UK market and access to leading garden centers, retailers, and grocers in the UK and Ireland. In Australia, Griffon acquired Hills Home Living, the iconic brand of clotheslines and home products, from Hills Limited (ASX:HIL) in December 2016 and in September 2017, Griffon acquired Tuscan Path, an Australian provider of pots, planters, pavers, decorative stone, and garden décor products. The Hills and

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Tuscan Path acquisitions broadened AMES' outdoor living and lawn and garden business, strengthening AMES’ portfolio of brands and its market position in Australia and New Zealand.

Further Information

Griffon posts and makes available, free of charge through its website at www.griffon.com, its annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) of the Securities Exchange Act of 1934, as well as press releases, as soon as reasonably practicable after such materials are published or filed with or furnished to the Securities and Exchange Commission (the “SEC”). The information found on Griffon's website is not part of this or any other report it files with or furnishes to the SEC.

For information regarding revenue, profit and total assets of each segment, see the Reportable Segments footnote in the Notes to Consolidated Financial Statements.

Reportable Segments:

Griffon currently conducts its operations through three reportable segments:

•CPP conducts its operations through AMES. Founded in 1774, AMES is the leading North American manufacturer and a global provider of branded consumer and professional tools and products for home storage and organization, landscaping, and enhancing outdoor lifestyles. CPP sells products globally through a portfolio of leading brands including True Temper, AMES, and ClosetMaid.

•HBP conducts its operations through 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 CornellCookson brand.

•DE conducts its operations through Telephonics Corporation, founded in 1933, a globally recognized leading provider of highly sophisticated intelligence, surveillance and communications solutions for defense, aerospace and commercial customers.

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OVERVIEW

Revenue for the quarter ended March 31, 2021 was $634,832 compared to $566,350 in the prior year comparable quarter, an increase of 12%; primarily driven by increased revenue at CPP and HBP of 21% and 16%, respectively, partially offset by reduced revenue at DE of 26%. Net income was $17,112 or $0.32 per share, compared to $895, or $0.02 per share, in the prior year quarter.

The current year quarter results from operations included the following:

–    Restructuring charges of $7,562 ($5,651, net of tax, or $0.11 per share);

–    Reduction to gain on sale of Systems Engineering Group ("SEG") business $949 ($766, net of tax, or $0.01 per share);

– Discrete and certain other tax provisions, net, of $1,913 or $0.04 per share.

The prior year quarter results from operations included the following:

– Restructuring charges of $3,104 ($3,005, net of tax, or $0.07 per share);

– Loss from debt extinguishment $6,690 ($5,245, net of tax, or $0.12 per share);

– Acquisition costs of $2,960 ($2,321, net of tax, or $0.05 per share); and

– Discrete and certain other tax benefits, net, of $1,413 or $0.03 per share.

Excluding these items from the respective quarterly results, Net income would have been $25,442, or $0.48 per share, in the current year quarter compared to $10,053, or $0.23 per share in the prior year quarter.

Revenue for the six months ended March 31, 2021 was $1,244,123 compared to $1,114,788 in the prior year period, an increase of 12%; primarily driven by increased revenue at CPP and HBP of 21% and 9%, respectively, partially offset by reduced revenue at DE of 13%. Net income was $46,612 or $0.88 per share, compared to $11,507, or $0.26 per share, in the prior year period.

The current year-to-date results from operations included the following:

–    Restructuring charges of $18,362 ($13,951, net of tax, or $0.26 per share);

–    Gain on sale of Systems Engineering Group ("SEG") business $5,291 ($5,251, net of tax, or $0.10 per share);

–    Discrete and certain other tax benefits, net, of $115 or $0.00 per share.

The prior year-to-date results from operations included the following:

– Restructuring charges of $9,538 ($7,153, net of tax, or $0.16 per share);

– Loss from debt extinguishment $6,690 ($5,245, net of tax, or $0.12 per share);

– Acquisition costs of $2,960 ($2,321, net of tax, or $0.05 per share); and

– Discrete and certain other tax benefits, net, of $580 or $0.01 per share.

Excluding these items from the respective periods, Net income would have been $55,197, or $1.04 per share in the current year period ended March 31, 2021 compared to $25,646, or $0.59 per share, in the comparable prior year period.

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Griffon evaluates performance based on Net income and the related Earnings per share excluding restructuring charges, loss from debt extinguishment, acquisition related expenses and discrete and certain other tax items, as well as other items that may affect comparability, as applicable. Griffon believes this information is useful to investors for the same reason. The following table provides a reconciliation of Net income to Adjusted net income and Earnings per share to Adjusted earnings per share:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
	(Unaudited)
Net income	$	17,112	$	895	$	46,612	$	11,507
Adjusting items:
Restructuring charges	7,562		3,104		18,362		9,538
(Gain) adjustment on sale of SEG business	949		—		(5,291)		—
Loss from debt extinguishment	—		6,690		—		6,690
Acquisition costs	—		2,960		—		2,960
Tax impact of above items	(2,094)		(2,183)		(4,371)		(4,469)
Discrete and certain other tax provisions (benefits), net	1,913		(1,413)		(115)		(580)
Adjusted net income	$	25,442	$	10,053	$	55,197	$	25,646
Diluted earnings per common share	$	0.32	$	0.02	$	0.88	$	0.26
Adjusting items, net of tax:
Restructuring charges	0.11		0.07		0.26		0.16
(Gain) adjustment on sale of SEG business	0.01		—		(0.10)		—
Loss from debt extinguishment	—		0.12		—		0.12
Acquisition costs	—		0.05		—		0.05
Discrete and certain other tax provisions (benefits), net	0.04		(0.03)		—		(0.01)
Adjusted earnings per common share	$	0.48	$	0.23	$	1.04	$	0.59
Weighted-average shares outstanding (in thousands)	53,264		43,734		53,211		43,826

Note: Due to rounding, the sum of earnings per common share and adjusting items, net of tax, may not equal adjusted earnings per common share.

The tax impact for the above reconciling adjustments from GAAP to non-GAAP Net income and EPS is determined by comparing the Company's tax provision, including the reconciling adjustments, to the tax provision excluding such adjustments.

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RESULTS OF OPERATIONS

Three and Six months ended March 31, 2021 and 2020

Griffon evaluates performance and allocates resources based on each segment's operating results before interest income and expense, income taxes, depreciation and amortization, unallocated amounts (primarily corporate overhead), restructuring charges, loss on debt extinguishment and acquisition related expenses, as well as other items that may affect comparability, as applicable (“Adjusted EBITDA”, a non-GAAP measure). Griffon believes this information is useful to investors for the same reason.

See table provided in Note 13 - Business Segments for a reconciliation of Segment Adjusted EBITDA to Income before taxes.

Consumer and Professional Products

	For the Three Months Ended March 31,								For the Six Months Ended March 31,
	2021				2020				2021				2020
Revenue	$	331,871			$	274,912			$	622,913			$	515,988
Adjusted EBITDA	37,423		11.3	%	25,027		9.1	%	70,136		11.3	%	46,953		9.1	%
Depreciation and amortization	8,620				8,222				16,819				16,453

For the quarter ended March 31, 2021, revenue increased $56,959, or 21%, compared to the prior year period, primarily due to increased volume of 17%, driven by continued consumer demand across all geographies, primarily for outdoor decor, landscaping and home organization products, and a favorable foreign currency impact of 4%.

For the quarter ended March 31, 2021, Adjusted EBITDA increased 50% to $37,423 compared to $25,027 in the prior year quarter. The favorable variance resulted primarily from the increased revenue noted above and a favorable foreign currency impact of 8%, partially offset by increased distribution and material costs and COVID-19 related inefficiencies.

For the six months ended March 31, 2021, revenue increased $106,925, or 21%, compared to the prior year period, primarily due to increased volume of 17%, driven by increased consumer demand across all geographies and all product categories, and a favorable foreign currency impact of 4%.

For the six months ended March 31, 2021, Adjusted EBITDA increased 49% to $70,136 compared to $46,953 in the prior year period. The favorable variance resulted primarily from the increased revenue noted above and a favorable currency impact of 6%, partially offset by increased distribution and material costs and COVID-19 related inefficiencies.

For the quarter and six months ended March 31, 2021, segment depreciation and amortization increased $398 and $366, respectively, compared to the prior year comparable periods, due to new assets placed in service.

On December 22, 2020, AMES acquired Quatro Design Pty Ltd (“Quatro”), a leading Australian manufacturer and supplier of glass fiber reinforced concrete landscaping products for residential, commercial, and public sector projects. Quatro is expected to contribute approximately $5,000 in annualized revenue in the first twelve months under AMES' ownership.

On November 29, 2019, AMES acquired Vatre Group Limited ("Apta"), a leading United Kingdom supplier of innovative garden pottery and associated products sold to leading UK and Ireland garden centers. This acquisition broadens AMES' product offerings in the UK market and increases its in-country operational footprint. Apta contributed approximately $20,000 in revenue in the first twelve months after the acquisition.

Strategic Initiative and Restructuring Charges

In November 2019, Griffon announced the development of a next-generation business platform for CPP to enhance the growth, efficiency, and competitiveness of its U.S. operations, and on November 12, 2020, Griffon announced that CPP is broadening this strategic initiative to include additional North American facilities, the AMES UK and Australia businesses, and a manufacturing facility in China.

The expanded focus of this initiative leverages the same three key development areas being executed within our U.S. operations. First, certain AMES global operations will be consolidated to optimize facilities footprint and talent. Second,

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strategic investments in automation and facilities expansion will be made to increase the efficiency of our manufacturing and fulfillment operations, and support e-commerce growth. Third, multiple independent information systems will be unified into a single data and analytics platform, which will serve the whole AMES global enterprise.

Expanding the roll-out of the new business platform from our AMES U.S. operations to include AMES’ global operations will extend the duration of the project by one year, with completion now expected by the end of calendar year 2023. When fully implemented, these actions will result in annual cash savings of $30,000 to $35,000 and a reduction in inventory of $30,000 to $35,000 both based on fiscal 2020 operating levels.

The cost to implement this new business platform, over the duration of the project, will include one-time charges of approximately $65,000 and capital investments of approximately $65,000. The one-time charges are comprised of $46,000 of cash charges, which includes $26,000 of personnel-related costs such as training, severance, and duplicate personnel costs as well as $20,000 of facility and lease exit costs. The remaining $19,000 of charges are non-cash and are primarily related to asset write-downs.

In connection with this initiative, during the year ended September 30, 2020 and during the six months ended March 31, 2021, CPP incurred pre-tax restructuring and related exit costs approximating $13,669 and $10,581, respectively. Since inception of this initiative in fiscal 2020, total cumulative charges totaled $24,250, comprised of cash charges of $16,868 and non-cash, asset-related charges of $7,382; the cash charges included $6,704 for one-time termination benefits and other personnel-related costs and $10,164 for facility exit costs. During the year ended September, 30, 2020 and during the six months ended March 31, 2021, capital expenditures of 6,733 and $5,445, respectively, were driven by investment in CPP business intelligence systems and e-commerce facility.

	Cash Charges				Non-Cash Charges
	Personnel related costs		Facilities, exit costs and other		Facility and other		Total		Capital Investments
Phase I	$	12,000	$	4,000	$	19,000	$	35,000	$	40,000
Phase II	14,000		16,000		—		30,000		25,000
Total Anticipated Charges	26,000		20,000		19,000		65,000		65,000
Total 2020 restructuring charges	(5,620)		(3,357)		(4,692)		(13,669)		(6,733)
Q1 FY2021 Activity	(362)		(2,524)		(193)		(3,079)		(2,236)
Q2 FY2021 Activity	(722)		(4,283)		(2,497)		(7,502)		$	(3,209)
Total 2021 restructuring charges	(1,084)		(6,807)		(2,690)		(10,581)		(5,445)
Total cumulative charges	(6,704)		(10,164)		(7,382)		(24,250)		(12,178)
Estimate to Complete	$	19,296	$	9,836	$	11,618	$	40,750	$	52,822

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Home and Building Products

	For the Three Months Ended March 31,								For the Six Months Ended March 31,
	2021				2020				2021				2020
Revenue	$	242,811			$	209,829			$	493,292			$	451,210
Adjusted EBITDA	40,060		16.5	%	30,635		14.6	%	88,429		17.9	%	71,336		15.8	%
Depreciation and amortization	4,379				4,668				8,720				9,468

For the quarter ended March 31, 2021, revenue increased $32,982 or 16%, compared to the prior year period, driven by increased volume.

For the quarter ended March 31, 2021, Adjusted EBITDA increased 31% to $40,060 compared to $30,635 in the prior year period. EBITDA benefited from increased revenue noted above and volume related benefits on absorption, partially offset by increased material costs and COVID-19 related inefficiencies.

For the six months ended March 31, 2021, revenue increased $42,082 or 9%, compared to the prior year period, driven by increased volume.

For the six months ended March 31, 2021, Adjusted EBITDA increased 24% to $88,429 compared to $71,336 in the prior year period. The favorable variance resulted from the increased revenue noted above and volume related benefits on absorption, partially offset by COVID-19 related inefficiencies.

For the quarter and six months ended March 31, 2021, segment depreciation and amortization decreased $289 and $748, respectively, compared to the prior year comparable periods, due to fully depreciated assets.

Defense Electronics  

	For the Three Months Ended March 31,								For the Six Months Ended March 31,
	2021				2020				2021				2020
Revenue	$	60,150			$	81,609			$	127,918			$	147,590
Adjusted EBITDA	2,220		3.7	%	4,248		5.2	%	7,805		6.1	%	8,723		5.9%
Depreciation and amortization	2,734				2,676				5,410				5,320

For the quarter ended March 31, 2021, revenue decreased $21,459, or 26%, compared to the prior year quarter. The prior year results include revenue from the SEG business of $7,460. Excluding the divestiture of SEG from prior year results, revenue decreased $13,999, or 19%. The decrease was driven by reduced volume due to the timing of work performed and deliveries on Communication and Surveillance programs.

For the quarter ended March 31, 2021, Adjusted EBITDA decreased $2,028, or 48%, compared to the prior year comparable period, driven by the reduced revenue noted above and cost growth on Surveillance programs, partially offset by the reduced headcount related to the reduction in force that occurred in the first quarter.

For the six months ended March 31, 2021, revenue decreased $19,672, or 13%, compared to the prior year period. The current and prior year results include revenue from the SEG business of $6,713 and $14,008, respectively. Excluding the divestiture of SEG from current and prior year results, revenue decreased $12,377, or 9%. The decline in revenue was driven by reduced volume related to the timing of work performed and deliveries on Communication and Surveillance programs, partially offset by Naval and Cyber systems.

For the six months ended March 31, 2021, Adjusted EBITDA decreased $918, or 11%, compared to the prior year comparable period driven by the reduced revenue noted above, partially offset by the benefit of reduced headcount related to the reduction in force that occurred in the first quarter.

Segment depreciation and amortization remained consistent with the prior year comparable quarter-to-date and year-to-dates periods.

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On December 18, 2020, DE completed the sale of its SEG business. SEG provides sophisticated, highly technical engineering and analytical support to the Missile Defense Agency and various U.S. military commands. SEG had sales of approximately $7,000 for the first fiscal quarter ended December 31, 2020 and $31,000 for the fiscal year ended September 30, 2020.

During the six months ended March 31, 2021, DE was awarded several new contracts and received incremental funding on existing contracts approximating $105,000 (excludes $5,500 of SEG awards). Contract backlog was $353,870 at March 31, 2021 compared to $320,214 at March 31, 2020 (excludes $11,526 of SEG related backlog) with 65% expected to be fulfilled in the next 12 months. Backlog was approximately $370,000 at September 30, 2020 (excludes approximately $10,000 of SEG related backlog). Backlog is defined as unfilled firm orders for products and services for which funding has been both authorized and appropriated by the customer, or by Congress, in the case of US government agencies.

Restructuring Charges and Divestiture

In September 2020, a Voluntary Employee Retirement Plan was initiated, which was subsequently followed by a reduction in force in November 2020, to improve efficiencies by combining functions and responsibilities. The reduction in force initiative resulted in severance charges of $2,180 during the six months ended March 31, 2021. These actions reduced headcount by approximately 90 people.

In addition, in the first quarter ended December 31, 2020, charges of $5,601 were recorded primarily related to exiting our older weather radar product lines.

DE recorded a pre-tax gain of $5,291 ($5,251, net of tax) during the six months ended March 31, 2021 related to the divestiture of SEG.

Unallocated

For the quarter ended March 31, 2021, unallocated amounts, excluding depreciation, consisted primarily of corporate overhead costs totaling $11,922 compared to $11,947 in the prior year quarter; for the six months ended March 31, 2021, unallocated amounts totaled $23,949 compared to $23,889 in the prior year period. The current quarter remained consistent with the prior year comparable quarter. The increase in the six months compared to the respective prior year period primarily relates to increases in compensation and incentive costs and consulting costs, partially offset by travel and administrative office costs.

Segment Depreciation and Amortization

Segment depreciation and amortization increased $167 for the quarter ended March 31, 2021 compared to the comparable prior year quarter, primarily due to depreciation and amortization on new assets placed in service. Segment depreciation and amortization decreased $292 for the six months ended March 31, 2021 compared to the comparable prior year period, primarily due to fully depreciated assets, partially offset by assets acquired in acquisitions.

Other Income (Expense)

For the quarters ended March 31, 2021 and 2020, Other income (expense) of $847 and $615, respectively, includes $320 and $745, respectively, of net currency exchange gains in connection with the translation of receivables and payables denominated in currencies other than the functional currencies of Griffon and its subsidiaries, net periodic benefit plan income of $227 and $389, respectively, as well as $55 and $(230), respectively, of net investment income (loss).

For the six months ended March 31, 2021 and 2020, Other income (expense) of $806 and 1,393 includes $(379) and $369, respectively, of net currency exchange gains (losses) in connection with the translation of receivables and payables denominated in currencies other than the functional currencies of Griffon and its subsidiaries, net periodic benefit plan income of $454 and $778, respectively, as well as $386 and $(149), respectively, of net investment income (loss). Additionally, Other income (expense) also includes a one-time technology recognition award for $700.

Provision for income taxes

During the quarter ended March 31, 2021, the Company recognized a tax provision of $10,748 on income before taxes of $27,860, compared to a tax provision of $2,034 on income before taxes of $2,929 in the comparable prior year quarter. The current year quarter results included restructuring charges of $7,562 ($5,651, net of tax), reduction to gain on sale of the SEG business of $949 ($766, net of tax) and discrete and certain other tax provisions, net, that affect comparability of $1,913. The prior year quarter results included restructuring charges of $3,104 ($3,005, net of tax), acquisition costs of $2,960 ($2,321, net of tax), loss from debt extinguishment of $6,690 ($5,245, net of tax) and discrete tax and certain other tax benefits, net, that

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affect comparability of $1,413. Excluding these items, the effective tax rates for the quarters ended March 31, 2021 and 2020 were 30.0% and 35.9%, respectively.

During the six months ended March 31, 2021, the Company recognized a tax provision of $20,417 on Income before taxes of $67,029, compared to a tax provision of $8,373 on income before taxes of $19,880 in the comparable prior year period. The six month period ended March 31, 2021 included restructuring charges of $18,362 ($13,951, net of tax), gain on sale of the SEG business of $5,291 ($5,251, net of tax) and discrete and certain other tax benefits, net, that affect comparability of $115. The six month period ended March 31, 2020 included restructuring charges of $9,538 ($7,153, net of tax), acquisition costs of $2,960 ($2,321, net of tax), loss from debt extinguishment of $6,690 ($5,245, net of tax) and discrete tax and certain other tax benefits, net, that affect comparability of $580. Excluding these items, the effective tax rates for the six months ended March 31, 2021 and 2020 were 31.1% and 34.4%, respectively.

Stock based compensation

For the quarters ended March 31, 2021 and 2020, stock based compensation expense, which includes expenses for both restricted stock grants and the ESOP, totaled $5,293 and $4,320, respectively. For the six months ended March 31, 2021 and 2020, stock based compensation expense totaled $9,501 and $8,302, respectively.

Comprehensive income (loss)

For the quarter ended March 31, 2021, total other comprehensive income, net of taxes, of $4,775 included a gain of $1,739 from foreign currency translation adjustments primarily due to the strengthening of the British Pound and Canadian Dollar, partially offset by the weakening of the Euro, all in comparison to the US Dollar; a $1,245 benefit from pension amortization; and a $1,791 gain on cash flow hedges.

For the six months ended March 31, 2021, total other comprehensive income, net of taxes, of $17,916 included a gain of $13,862 from foreign currency translation adjustments primarily due to the strengthening of the British Pound and Canadian and Australian Dollars, all in comparison to the US Dollar; a $2,951 benefit from pension amortization of actuarial losses; and a $1,103 gain on cash flow hedges.

For the quarter ended March 31, 2020, total other comprehensive loss, net of taxes, of $14,834 included a loss of $16,471 from foreign currency translation adjustments primarily due to the weakening of the British Pound, and Canadian and Australian Dollars, all in comparison to the US Dollar; a $669 benefit from pension amortization of actuarial losses; and a $968 gain on cash flow hedges.

For the six months ended March 31, 2020, total other comprehensive loss, net of taxes, of $7,993, included a loss of $10,001 from foreign currency translation adjustments primarily due to the weakening of the Canadian and Australian Dollars, all in comparison to the US Dollar, a $1,341 benefit from pension amortization of actuarial losses and a $667 gain on cash flow hedges.

Discontinued operations

At March 31, 2021, Griffon's assets and liabilities are primarily for the Installations Services and other discontinued operations primarily related to insurance claims, income tax and product liability, warranty reserves and environmental reserves. See Note 16, Discontinued Operations.

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LIQUIDITY AND CAPITAL RESOURCES

Management assesses Griffon’s liquidity in terms of its ability to generate cash to fund its operating, investing and financing activities. Significant factors affecting liquidity are: cash flows from operating activities, capital expenditures, acquisitions, dispositions, bank lines of credit and the ability to attract long-term capital under satisfactory terms. Griffon believes it has sufficient liquidity available to invest in its existing businesses and execute strategic acquisitions, while managing its capital structure on both a short-term and long-term basis.

The following table is derived from the Condensed Consolidated Statements of Cash Flows:

Cash Flows from Operations	For the Six Months Ended March 31,
	2021		2020
Net Cash Flows Provided by (Used In):
Operating activities	$	(25,841)	$	(60,843)
Investing activities	(13,532)		(32,760)
Financing activities	(5,916)		94,351

Cash used by operating activities for the six months ended March 31, 2021 was $25,841 compared to cash used of $60,843 in the comparable prior year period. Cash provided by income from operations, adjusted for non-cash expenditures, was more than offset by a net increase in working capital predominately consisting of a net increase in accounts receivable and an increase in inventory, primarily to meet seasonal demands.

During the six months ended March 31, 2021, Griffon's use of cash from investing activities was $13,532 compared to $32,760 used in the prior year comparable period. On December 18, 2020, DE completed the sale of its SEG business and received net proceeds from the sale of $14,725. Payments for acquired businesses totaled $2,242 compared to $10,531 in the prior year comparable period. On December 22, 2020, AMES acquired Quatro, a leading Australian manufacturer and supplier of glass fiber reinforced concrete landscaping products for residential, commercial, and public sector projects. On November 29, 2019, AMES acquired 100% of the outstanding stock of Apta, a leading United Kingdom supplier of innovative garden pottery and associated products sold to leading UK and Ireland garden centers for approximately $10,500 (GBP 8,750), inclusive of a post-closing working capital adjustment, net of cash acquired. We had an increase in investments of $2,138. Capital expenditures, net of proceeds from the sale of assets, for the six months ended March 31, 2021 totaled $23,904, an increase of $1,675 from the prior year period.

During the six months ended March 31, 2021, cash used by financing activities from operations totaled $5,916 as compared to $94,351 provided by in the comparable prior year period. Cash used in financing activities in the current period consisted primarily of the payment of dividends and purchase of treasury shares to satisfy vesting of restricted stock, partially offset by net borrowings of long-term debt.

During 2020, the Company declared and paid regular cash dividends totaling $0.30 per share, or $0.075 per share each quarter. During the six months ended March 31, 2021, the Board of Directors approved and paid two quarterly cash dividend of $0.08 per share each. The Company currently intends to pay dividends each quarter; however, payment of dividends is determined by the Board of Directors at its discretion based on various factors, and no assurance can be provided as to the payment of future dividends. On April 29, 2021, the Board of Directors declared a quarterly cash dividend of $0.08 per share, payable on June 17, 2021 to shareholders of record as of the close of business on May 20, 2021.

During the six months ended March 31, 2021, 133,027 shares, with a market value of $2,774, or $20.85 per share were withheld to settle employee taxes due upon the vesting of restricted stock, and were added to treasury stock. Furthermore, during the six months ended March 31, 2021, an additional 6,507 shares, with a market value of $135, or $20.75 per share, were withheld from common stock issued upon the vesting of restricted stock units to settle employee taxes due upon vesting.

On each of August 3, 2016 and August 1, 2018, Griffon’s Board of Directors authorized the repurchase of $50,000 of Griffon’s outstanding common stock. Under these share repurchase programs, the Company may, from time to time, purchase shares of its common stock in the open market, including pursuant to a 10b5-1 plan, or in privately negotiated transactions. As of March 31, 2021, an aggregate of $57,955 remains under Griffon's Board authorized repurchase programs. No shares were repurchased during the six months ended March 31, 2021 under these share repurchase programs.

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During the six months ended March 31, 2021, COVID-19 has not had a material impact on our operations, and we anticipate our current cash balances, cash flows from operations and sources of liquidity will be sufficient to meet our cash requirements.

Payments related to DE revenue are received in accordance with the terms of development and production subcontracts; certain of such receipts are progress or performance-based payments. With respect to CPP and HBP, there have been no material adverse impacts on payment for sales.

A small number of customers account for, and are expected to continue to account for, a substantial portion of Griffon’s consolidated revenue. For the six months ended March 31, 2021:

•The United States Government and its agencies, through either prime or subcontractor relationships, represented 7% of Griffon’s consolidated revenue and 64% of DE revenue.

•The Home Depot represented 17% of Griffon’s consolidated revenue, 24% of CPP's revenue and 11% of HBP’s revenue.

No other customer exceeded 10% of consolidated revenue. Future operating results will continue to depend substantially on the success of Griffon’s largest customers and our ongoing relationships with them. Orders from these customers are subject to change and may fluctuate materially. The loss of all or a portion of the volume from any one of these customers could have a material adverse impact on Griffon’s liquidity and results of operations.

Cash and Equivalents and Debt	March 31,		September 30,
	2021		2020
Cash and equivalents	$	175,564	$	218,089
Notes payables and current portion of long-term debt	14,913		9,922
Long-term debt, net of current maturities	1,043,859		1,037,042
Debt discount/premium and issuance costs	16,143		17,458
Total debt	1,074,915		1,064,422
Debt, net of cash and equivalents	$	899,351	$	846,333

On June 22, 2020, in an unregistered offering through a private placement, Griffon completed the add-on offering of $150,000 principal amount of its 5.75% Senior Notes, at 100.25% of par, to Griffon's previously issued $850,000 principal amount of its 5.75% Senior Notes, at par, completed on February 19, 2020 (collectively, the “Senior Notes”). Proceeds from the Senior Notes were used to redeem the $1,000,000 of 5.25% 2022 senior notes. As of March 31, 2021, outstanding Senior Notes due totaled $1,000,000; interest is payable semi-annually on March 1 and September 1.

The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On April 22, 2020 and August 3, 2020, Griffon exchanged substantially all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933, as amended (the "Securities Act"), via an exchange offer. The fair value of the Senior Notes approximated $1,060,000 on March 31, 2021 based upon quoted market prices (level 1 inputs).

In connection with these transactions, Griffon capitalized $16,448 of underwriting fees and other expenses incurred related to the issuance and exchange of the 2028 Senior Notes, which will amortize over the term of the 2028 Senior Notes. Furthermore, all of the obligations associated with the 2022 Senior Notes were discharged. Additionally, Griffon recognized a $7,925 loss on the early extinguishment of debt of the $1,000,000 principal amount of 2022 Senior Notes, comprised primarily of the write-off of $6,725 of remaining deferred financing fees, $607 of tender offer net premium expense and $593 of redemption interest expense.

On January 30, 2020, Griffon amended its revolving credit facility (as amended, the "Credit Agreement") to increase the maximum borrowing availability from $350,000 to $400,000, and extend its maturity date from March 22, 2021 to March 22, 2025 and modify certain other provisions of the facility. The facility includes a letter of credit sub-facility with a limit of $100,000; a multi-currency sub-facility of $200,000; and contains a customary accordion feature that permits us to request, subject to each lender's consent, an increase in the maximum aggregate amount that can be borrowed by up to an additional $100,000.

Borrowings under the Credit Agreement may be repaid and re-borrowed at any time. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, plus an applicable margin, which adjusts based on financial performance. Current

47

margins are 0.50% for base rate loans and 1.50% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio, as well as customary affirmative and negative covenants, and events of default. The negative covenants place limits on Griffon's ability to, among other things, incur indebtedness, incur liens, and make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all domestic assets of the Company and the guarantors, and a pledge of not greater than 65% of the equity interest in Griffon’s material, first-tier foreign subsidiaries. At March 31, 2021, there were $20,622 of outstanding borrowings under the Credit Agreement; outstanding standby letters of credit were $16,310; and $363,068 was available, subject to certain loan covenants, for borrowing at that date.

Two of Griffon's subsidiaries have finance leases outstanding for real estate located in Troy, Ohio and Ocala, Florida. The leases mature in 2021 and 2025, respectively, and bear interest at fixed rates of approximately 5.0% and 5.6%, respectively. The Troy, Ohio lease is secured by a mortgage on the real estate and is guaranteed by Griffon. The Ocala, Florida lease contains two five-year renewal options. At March 31, 2021, $15,907 was outstanding, net of issuance costs.

In November 2012, Garant G.P. (“Garant”), a Griffon wholly owned subsidiary, entered into a CAD 15,000 ($11,894 as of March 31, 2021) revolving credit facility.  The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.41% LIBOR USD and 1.47% Bankers Acceptance Rate CDN as of March 31, 2021). The revolving facility matures in October 2022. Garant is required to maintain a certain minimum equity.  At March 31, 2021, there were no borrowings under the revolving credit facility with CAD 15,000 ($11,894 as of March 31, 2021) available for borrowing.

In July 2016, Griffon Australia Holdings Pty Ltd and its Australian subsidiaries (collectively, "Griffon Australia") entered into an AUD 29,625 term loan, AUD 20,000 revolver and AUD 10,000 receivable purchase facility agreement. The term loan requires quarterly principal payments of AUD 1,250 plus interest with a balloon payment of AUD 9,625 due upon maturity in March 2022, and accrues interest at Bank Bill Swap Bid Rate “BBSY” plus 1.95% per annum (2.01% at March 31, 2021). During fiscal 2020, the term loan balance was reduced by AUD 5,000, from AUD 23,375 to AUD 18,375 with proceeds from an AUD 5,000 increase in the commitment of the receivables purchase line from AUD 10,000 to AUD 15,000. As of March 31, 2021, the term loan had an outstanding balance of AUD 13,375 ($10,192 as of March 31, 2021). The revolving facility and receivable purchase facility mature in March 2022, but are renewable upon mutual agreement with the lender. The revolving facility and receivable purchase facility accrue interest at BBSY plus 1.9% and 1.35%, respectively, per annum (1.98% and 1.41%, respectively, at March 31, 2021). At March 31, 2021, there were no balances outstanding under the revolver and the receivable purchase facility. The revolver, receivable purchase facility and the term loan are all secured by substantially all of the assets of Griffon Australia and its subsidiaries. Griffon Australia is required to maintain a certain minimum equity level and is subject to a maximum leverage ratio and a minimum fixed charges cover ratio.

In July 2018, The AMES Companies UK Ltd and its subsidiaries (collectively, "AMES UK") entered into a GBP 14,000 term loan, GBP 4,000 mortgage loan and GBP 5,000 revolver. The term loan and mortgage loan require quarterly principal payments of GBP 438 and GBP 105 plus interest, respectively, and have balloon payments due upon maturity, July 2023, of GBP 7,088 and GBP 2,349, respectively. The Term Loan and Mortgage Loans each accrue interest at the GBP LIBOR Rate plus 1.8%, (1.85% at March 31, 2021). The revolving facility matures in May 2021, but is renewable upon mutual agreement with the lender, and accrues interest at the Bank of England Base Rate plus 1.5% (1.60% as of March 31, 2021). As of March 31, 2021, the revolver had an outstanding balance of GBP $3,204 ($4,405 as of March 31, 2021) while the term and mortgage loan balances amounted to GBP 14,313 ($19,678 as of March 31, 2021). The revolver and the term loan are both secured by substantially all of the assets of AMES UK and its subsidiaries. AMES UK is subject to a maximum leverage ratio and a minimum fixed charges cover ratio. An invoice discounting arrangement was canceled and replaced by the above loan facilities.

On March 13, 2019, Griffon's Employee Stock Ownership Plan entered into an agreement that refinanced a term loan with a bank with an internal loan from Griffon. The internal loan interest rate is fixed at 2.91%, matures in June 2033 and requires quarterly payments of principal, currently $635, and interest. The internal loan is secured by shares purchased with the proceeds of the loan. The amount outstanding on the internal loan at March 31, 2021 was $28,608.

Other long-term debt primarily consists of a loan with the Pennsylvania Industrial Development Authority, with the balance consisting of capital leases.

At March 31, 2021, Griffon and its subsidiaries were in compliance with the terms and covenants of its credit and loan agreements. Gross Debt to EBITDA (Leverage), as calculated in accordance with the definition in the Credit Agreement, was 3.1x at March 31, 2021.

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During the six months ended March 31, 2021, cash provided by discontinued operations from operating activities of $1,237 primarily related to insurance proceeds received, partially offset by the settling of certain liabilities and environmental costs associated with the Installations Services.

During the six months ended March 31, 2020, Griffon used cash for discontinued operations from operating activities of $1,994 primarily related to the settling of certain liabilities and environmental costs associated with the Plastics business and Installations Services.

SUPPLEMENTAL GUARANTOR FINANCIAL INFORMATION

Griffon’s Senior Notes are fully and unconditionally guaranteed, jointly and severally by Clopay Corporation, Telephonics Corporation, The AMES Companies, Inc., ATT Southern LLC, Clopay Ames Holding Corp., ClosetMaid LLC, CornellCookson, LLC and Cornell Real Estate Holdings, LLC, all of which are indirectly 100% owned by Griffon. In accordance with Rule 3-10 of Regulation S-X promulgated under the Securities Act, presented below are summarized financial information of the Parent (Griffon) subsidiaries and the Guarantor subsidiaries as of March 31, 2021 and September 30, 2020 and for the three and six months ended March 31, 2021 and for the year ended September 30, 2020. All intercompany balances and transactions between subsidiaries under Parent and subsidiaries under the Guarantor have been eliminated. The information presented below excludes eliminations necessary to arrive at the information on a consolidated basis. The summarized information excludes financial information of the Non-Guarantors, including earnings from and investments in these entities. The financial information may not necessarily be indicative of the results of operations or financial position of the guarantor companies or non-guarantor companies had they operated as independent entities. The guarantor companies and the non-guarantor companies include the consolidated financial results of their wholly-owned subsidiaries accounted for under the equity method.

The indentures relating to the Senior Notes (the “Indentures”) contain terms providing that, under certain limited circumstances, a guarantor will be released from its obligations to guarantee the Senior Notes.  These circumstances include (i) a sale of at least a majority of the stock, or all or substantially all the assets, of the subsidiary guarantor as permitted by the Indentures; (ii) a public equity offering of a subsidiary guarantor that qualifies as a “Minority Business” as defined in the Indentures (generally, a business the EBITDA of which constitutes less than 50% of the segment adjusted EBITDA of the Company for the most recently ended four fiscal quarters), and that meets certain other specified conditions as set forth in the Indentures; (iii) the designation of a guarantor as an “unrestricted subsidiary” as defined in the Indentures, in compliance with the terms of the Indentures; (iv) Griffon exercising its right to defease the Senior Notes, or to otherwise discharge its obligations under the Indentures, in each case in accordance with the terms of the Indentures; and (v) upon obtaining the requisite consent of the holders of the Senior Notes.

Summarized Statements of Operations and Comprehensive Income (Loss)

	For the Six Months Ended				For the Year Ended
	March 31, 2021				September 30, 2020
	Parent Company		Guarantor Companies		Parent Company		Guarantor Companies
Net sales	$	—	$	963,060	$	—	$	1,938,972
Gross profit	$	—	$	244,410	$	—	$	488,048
Income (loss) from operations	$	(11,830)	$	65,333	$	(24,876)	$	130,147
Equity in earnings of Guarantor subsidiaries	$	38,021	$	—	$	58,455	$	—
Net income (loss)	$	(17,849)	$	38,021	$	(48,546)	$	58,455

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Summarized Balance Sheet Information

	For the Six Months Ended				For the Year Ended
	March 31, 2021				September 30, 2020
	Parent Company		Guarantor Companies		Parent Company		Guarantor Companies
Current assets	$	86,155	$	861,455	$	140,003	$	776,069
Non-current assets	20,115		1,082,360		23,069		1,046,225
Total assets	$	106,270	$	1,943,815	$	163,072	$	1,822,294
Current liabilities	$	36,210	$	316,221	$	39,130	$	296,293
Long-term debt	1,004,669		15,090		995,636		15,992
Other liabilities	36,599		189,636		38,024		195,792
Total liabilities	$	1,077,478	$	520,947	$	1,072,790	$	508,077

CRITICAL ACCOUNTING POLICIES

The preparation of Griffon’s consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires the use of estimates, assumptions, judgments and subjective interpretations of accounting principles that have an impact on assets, liabilities, revenue and expenses. These estimates can also affect supplemental information contained in public disclosures of Griffon, including information regarding contingencies, risk and its financial condition. These estimates, assumptions and judgments are evaluated on an ongoing basis and based on historical experience, current conditions and various other assumptions, and form the basis for estimating the carrying values of assets and liabilities, as well as identifying and assessing the accounting treatment for commitments and contingencies. Actual results may materially differ from these estimates. There have been no changes in Griffon’s critical accounting policies from September 30, 2020.

Griffon’s significant accounting policies and procedures are explained in the Management Discussion and Analysis section in the Annual Report on Form 10-K for the year ended September 30, 2020. In the selection of the critical accounting policies, the objective is to properly reflect the financial position and results of operations for each reporting period in a consistent manner that can be understood by the reader of the financial statements. Griffon considers an estimate to be critical if it is subjective and if changes in the estimate using different assumptions would result in a material impact on the financial position or results of operations of Griffon.

RECENT ACCOUNTING PRONOUNCEMENTS

The FASB issues, from time to time, new financial accounting standards, staff positions and emerging issues task force consensus. See the Notes to Condensed Consolidated Financial Statements for a discussion of these matters.

FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q, especially “Management’s Discussion and Analysis”, contains certain “forward-looking statements” within the meaning of the Securities Act, the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. Such statements relate to, among other things, income (loss), earnings, cash flows, revenue, changes in operations, operating improvements, industries in which Griffon Corporation (the “Company” or “Griffon”) operates and the United States and global economies. Statements in this Form 10-Q that are not historical are hereby identified as “forward-looking statements” and may be indicated by words or phrases such as “anticipates,” “supports,” “plans,” “projects,” “expects,” “believes,” “should,” “would,” “could,” “hope,” “forecast,” “management is of the opinion,” “may,” “will,” “estimates,” “intends,” “explores,” “opportunities,” the negative of these expressions, use of the future tense and similar words or phrases. Such forward-looking statements are subject to inherent risks and uncertainties that could cause actual results to differ materially from those expressed in any forward-looking statements. These risks and uncertainties include, among others: current economic conditions and uncertainties in the housing, credit and capital markets; Griffon’s ability to achieve expected savings from cost control, restructuring, integration and disposal initiatives; the ability to identify and successfully consummate and integrate value-adding acquisition opportunities; increasing competition and pricing pressures in the markets served by Griffon’s operating companies; the ability of Griffon’s operating companies to expand into new geographic and product markets and to anticipate and meet customer demands for new products and product enhancements and innovations; reduced military spending by the government on projects for which Telephonics supplies products, including as a result of defense budget cuts or other government actions; the ability of the federal government to fund and conduct its operations;

50

increases in the cost or lack of availability of raw materials such as resin, wood and steel, components or purchased finished goods, including any potential impact on costs or availability resulting from tariffs; changes in customer demand or loss of a material customer at one of Griffon’s operating companies; the potential impact of seasonal variations and uncertain weather patterns on certain of Griffon’s businesses; political events that could impact the worldwide economy; a downgrade in Griffon’s credit ratings; changes in international economic conditions including interest rate and currency exchange fluctuations; the reliance by certain of Griffon’s businesses on particular third party suppliers and manufacturers to meet customer demands; the relative mix of products and services offered by Griffon’s businesses, which impacts margins and operating efficiencies; short-term capacity constraints or prolonged excess capacity; unforeseen developments in contingencies, such as litigation, regulatory and environmental matters; unfavorable results of government agency contract audits of Telephonics; Griffon’s ability to adequately protect and maintain the validity of patent and other intellectual property rights; the cyclical nature of the businesses of certain of Griffon’s operating companies; possible terrorist threats and actions and their impact on the global economy; the impact of COVID-19 on the U.S. and the global economy, including business disruptions, reductions in employment and an increase in business and operating facility failures, specifically among our customers; Griffon's ability to service and refinance its debt; and the impact of recent and future legislative and regulatory changes, including, without limitation, changes in tax laws. Additional important factors that could cause the statements made in this Quarterly Report on Form 10-Q or the actual results of operations or financial condition of Griffon to differ are discussed under the caption “Item 1A. Risk Factors” and “Special Notes Regarding Forward-Looking Statements” in Griffon’s Annual Report on Form 10-K for the year ended September 30, 2020. Readers are cautioned not to place undue reliance on these forward-looking statements. These forward-looking statements speak only as of the date made. Griffon undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 3 - Quantitative and Qualitative Disclosure About Market Risk

Griffon’s business’ activities necessitate the management of various financial and market risks, including those related to changes in interest rates, foreign currency rates and commodity prices.

Interest Rates

Griffon’s exposure to market risk for changes in interest rates relates primarily to variable interest rate debt and investments in cash and equivalents.

The Credit Agreement and certain other of Griffon’s credit facilities have a LIBOR-based variable interest rate. Due to the current and expected level of borrowings under these facilities, a 100 basis point change in LIBOR would not have a material impact on Griffon’s results of operations or liquidity.

Foreign Exchange

Griffon conducts business in various non-US countries, primarily in Canada, Australia, the United Kingdom, Mexico and China; therefore, changes in the value of the currencies of these countries affect Griffon's financial position and cash flows when translated into US Dollars. Griffon has generally accepted the exposure to exchange rate movements relative to its non-US operations. Griffon may, from time to time, hedge its currency risk exposures. A change of 10% or less in the value of all applicable foreign currencies would not have a material effect on Griffon’s financial position and cash flows.

Item 4 - Controls and Procedures

Under the supervision and with the participation of Griffon’s Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), Griffon’s disclosure controls and procedures, as defined by Exchange Act Rule 13a-15(e) and 15d-15(e), were evaluated as of the end of the period covered by this report. Based on that evaluation, Griffon’s CEO and CFO concluded that Griffon’s disclosure controls and procedures were effective at the reasonable assurance level.

During the period covered by this report, there were no changes in Griffon’s internal control over financial reporting which materially affected, or are reasonably likely to materially affect, Griffon’s internal control over financial reporting.

Limitations on the Effectiveness of Controls

Griffon believes that a control system, no matter how well designed and operated, cannot provide absolute assurance that the objectives of the control system are met, and no evaluation of controls can provide absolute assurance that all controls issues and instances of fraud, if any, within a company have been detected. Griffon’s disclosure controls and procedures, as defined by Exchange Act Rule 13a-15(e) and 15d-15(e), are designed to provide reasonable assurance of achieving their objectives.

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PART II - OTHER INFORMATION

Item 1    Legal Proceedings

None

Item 1A    Risk Factors

In addition to the other information set forth in this report, carefully consider the factors in Item 1A to Part I in Griffon’s Annual Report on Form 10-K for the year ended September 30, 2020, which could materially affect Griffon’s business, financial condition or future results. The risks described in Griffon’s Annual Report on Form 10-K are not the only risks facing Griffon. Additional risks and uncertainties not currently known to Griffon or that Griffon currently deems to be immaterial also may materially adversely affect Griffon’s business, financial condition and/or operating results.

Item 2    Unregistered Sales of Equity Securities and Use of Proceeds

(c)    ISSUER PURCHASES OF EQUITY SECURITIES

Period	(a) Total Number of Shares (or Units) Purchased	(b) Average Price Paid Per Share (or Unit)		(c) Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs (1)	(d) Maximum Number (or Approximate Dollar Value) of Shares (or Units) That May Yet Be Purchased Under the Plans or Programs (1)
January 1 - 31, 2021	—	$	—	—
February 1 - 28, 2021	—	—		—
March 1 - 31, 2021	—	—		—
Total	—	$	—	—	$	57,955

1.On each of August 3, 2016 and August 1, 2018, the Company’s Board of Directors authorized the repurchase of up to $50,000 of Griffon common stock; as of March 31, 2021, an aggregate of $57,955 remained available for the purchase of Griffon common stock under these repurchase programs. Amount consists of shares purchased by the Company in open market purchases pursuant to such Board authorized stock repurchase program.

Item 3    Defaults Upon Senior Securities

None

Item 4    Mine Safety Disclosures

None

Item 5    Other Information

None

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Item 6	Exhibits
31.1	Certification pursuant to Rule 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification pursuant to Rule 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32	Certifications pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Document
101.DEF	XBRL Taxonomy Extension Definitions Document
101.LAB	XBRL Taxonomy Extension Labels Document
101.PRE	XBRL Taxonomy Extension Presentations Document

53

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

GRIFFON CORPORATION

/s/ Brian G. Harris

Brian G. Harris

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

/s/ W. Christopher Durborow

W. Christopher Durborow

Vice President and Chief Accounting Officer

(Principal Accounting Officer)

Date: April 29, 2021

54

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Ronald J. Kramer, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Griffon Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:April 29, 2021

/s/ Ronald J. Kramer

Ronald J. Kramer

Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Brian G. Harris, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Griffon Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 29, 2021

/s/ Brian G. Harris

Brian G. Harris

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATIONS PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Ronald J. Kramer, Chief Executive Officer of Griffon Corporation, hereby certify that the Form 10-Q of Griffon Corporation for the period ended March 31, 2021 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of Griffon Corporation.

/s/ Ronald J. Kramer

Name: Ronald J. Kramer

Date: April 29, 2021

I, Brian G. Harris, Senior Vice President and Chief Financial Officer of Griffon Corporation, hereby certify that the Form 10-Q of Griffon Corporation for the period ended March 31, 2021 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of Griffon Corporation.

/s/ Brian G. Harris

Name: Brian G. Harris

Date: April 29, 2021

A signed original of this written statement required by Section 906 has been provided to Griffon Corporation and will be retained by Griffon Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Cover Page	6 Months Ended
	Mar. 31, 2021 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	1-06620
Entity Registrant Name	GRIFFON CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	11-1893410
Entity Address, Address Line One	712 Fifth Ave, 18th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10019
City Area Code	212
Local Phone Number	957-5000
Title of 12(b) Security	Common Stock, $0.25 par value
Trading Symbol	GFF
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	56,683,519
Current Fiscal Year End Date	--09-30
Amendment Flag	false
Entity Central Index Key	0000050725
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
CURRENT ASSETS
Cash and equivalents	$ 175,564	$ 218,089
Accounts receivable, net of allowances of $9,594 and $8,505	399,193	340,546
Contract assets, net of progress payments of $20,449 and $24,175	75,000	84,426
Inventories	484,753	413,825
Prepaid and other current assets	55,705	46,897
Assets of discontinued operations	1,525	2,091
Total Current Assets	1,191,740	1,105,874
PROPERTY, PLANT AND EQUIPMENT, net	341,005	343,964
OPERATING LEASE RIGHT-OF-USE ASSETS	154,929	161,627
GOODWILL	446,365	442,643
INTANGIBLE ASSETS, net	357,506	355,028
OTHER ASSETS	27,440	32,897
ASSETS OF DISCONTINUED OPERATIONS	5,295	6,406
Total Assets	2,524,280	2,448,439
CURRENT LIABILITIES
Notes payable and current portion of long-term debt	14,913	9,922
Accounts payable	257,286	232,107
Accrued liabilities	151,091	163,994
Current portion of operating lease liabilities	30,685	31,848
Liabilities of discontinued operations	4,600	3,797
Total Current Liabilities	458,575	441,668
LONG-TERM DEBT, net	1,043,859	1,037,042
LONG-TERM OPERATING LEASE LIABILITIES	128,714	136,054
OTHER LIABILITIES	122,286	126,510
LIABILITIES OF DISCONTINUED OPERATIONS	6,415	7,014
Total Liabilities	1,759,849	1,748,288
COMMITMENTS AND CONTINGENCIES - See Note 22
SHAREHOLDERS’ EQUITY
Total Shareholders’ Equity	764,431	700,151
Total Liabilities and Shareholders’ Equity	$ 2,524,280	$ 2,448,439

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Statement of Financial Position [Abstract]
Accounts receivable, net allowances	$ 9,594	$ 8,505
Contract costs, net of progress payments	$ 20,449	$ 24,175

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CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	COMMON STOCK	CAPITAL IN EXCESS OF PAR VALUE	RETAINED EARNINGS	TREASURY SHARES	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	DEFERRED COMPENSATION
Balance (in shares) at Sep. 30, 2019		82,775			35,969
Balance at Sep. 30, 2019	$ 477,763	$ 20,694	$ 519,017	$ 568,516	$ (536,308)	$ (65,916)	$ (28,240)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,612			10,612
Dividend	(3,392)			(3,392)
Shares withheld on employee taxes on vested equity awards (in shares)					80
Shares withheld on employee taxes on vested equity awards	(1,758)				$ (1,758)
Amortization of deferred compensation	629						629
Equity awards granted, net (in shares)		182
Equity awards granted, net	0	$ 45	(45)
ESOP allocation of common stock	609		609
Stock-based compensation	3,150		3,150
Stock-based consideration	239		239
Other comprehensive income, net of tax	6,841					6,841
Balance (in shares) at Dec. 31, 2019		82,957			36,049
Balance at Dec. 31, 2019	494,693	$ 20,739	522,970	575,736	$ (538,066)	(59,075)	(27,611)
Balance (in shares) at Sep. 30, 2019		82,775			35,969
Balance at Sep. 30, 2019	477,763	$ 20,694	519,017	568,516	$ (536,308)	(65,916)	(28,240)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,507
Other comprehensive income, net of tax	(7,993)
Balance (in shares) at Mar. 31, 2020		83,741			36,310
Balance at Mar. 31, 2020	476,454	$ 20,935	526,988	573,209	$ (543,787)	(73,909)	(26,982)
Balance (in shares) at Dec. 31, 2019		82,957			36,049
Balance at Dec. 31, 2019	494,693	$ 20,739	522,970	575,736	$ (538,066)	(59,075)	(27,611)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	895			895
Dividend	(3,422)			(3,422)
Shares withheld on employee taxes on vested equity awards (in shares)					261
Shares withheld on employee taxes on vested equity awards	(5,721)				$ (5,721)
Amortization of deferred compensation	629						629
Equity awards granted, net (in shares)		784
Equity awards granted, net	0	$ 196	(196)
ESOP allocation of common stock	435		435
Stock-based compensation	3,662		3,662
Stock-based consideration	117		117
Other comprehensive income, net of tax	(14,834)					(14,834)
Balance (in shares) at Mar. 31, 2020		83,741			36,310
Balance at Mar. 31, 2020	476,454	$ 20,935	526,988	573,209	$ (543,787)	(73,909)	(26,982)
Balance (in shares) at Sep. 30, 2020		83,739			27,610
Balance at Sep. 30, 2020	700,151	$ 20,935	583,008	607,518	$ (413,493)	(72,092)	(25,725)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,500			29,500
Dividend	(4,469)			(4,469)
Shares withheld on employee taxes on vested equity awards (in shares)					133
Shares withheld on employee taxes on vested equity awards	(2,909)				$ (2,909)
Amortization of deferred compensation	609						609
Equity awards granted, net (in shares)		494
Equity awards granted, net	0	$ 123	(123)
ESOP allocation of common stock	596		596
Stock-based compensation	3,428		3,428
Other comprehensive income, net of tax	13,141					13,141
Balance (in shares) at Dec. 31, 2020		84,233			27,743
Balance at Dec. 31, 2020	740,047	$ 21,058	586,909	632,549	$ (416,402)	(58,951)	(25,116)
Balance (in shares) at Sep. 30, 2020		83,739			27,610
Balance at Sep. 30, 2020	700,151	$ 20,935	583,008	607,518	$ (413,493)	(72,092)	(25,725)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	46,612
Other comprehensive income, net of tax	17,916
Balance (in shares) at Mar. 31, 2021		84,427			27,743
Balance at Mar. 31, 2021	764,431	$ 21,106	591,966	646,444	$ (416,402)	(54,176)	(24,507)
Balance (in shares) at Dec. 31, 2020		84,233			27,743
Balance at Dec. 31, 2020	740,047	$ 21,058	586,909	632,549	$ (416,402)	(58,951)	(25,116)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,112			17,112
Dividend	(3,217)			(3,217)
Amortization of deferred compensation	609						609
Equity awards granted, net (in shares)		194
Equity awards granted, net	0	$ 48	(48)
ESOP allocation of common stock	756		756
Stock-based compensation	4,349		4,349
Other comprehensive income, net of tax	4,775					4,775
Balance (in shares) at Mar. 31, 2021		84,427			27,743
Balance at Mar. 31, 2021	$ 764,431	$ 21,106	$ 591,966	$ 646,444	$ (416,402)	$ (54,176)	$ (24,507)

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 634,832	$ 566,350	$ 1,244,123	$ 1,114,788
Cost of goods and services	464,516	414,318	903,635	812,835
Gross profit	170,316	152,032	340,488	301,953
Selling, general and administrative expenses	126,827	126,467	248,384	244,265
Income from operations	43,489	25,565	92,104	57,688
Other income (expense)
Interest expense	(15,831)	(16,871)	(31,521)	(33,082)
Interest income	304	310	349	571
Gain (adjustment) on sale of business	(949)	0	5,291	0
Loss from debt extinguishment, net	0	(6,690)	0	(6,690)
Other, net	847	615	806	1,393
Total other expense, net	(15,629)	(22,636)	(25,075)	(37,808)
Income before taxes	27,860	2,929	67,029	19,880
Provision for income taxes	10,748	2,034	20,417	8,373
Net income	$ 17,112	$ 895	$ 46,612	$ 11,507
Basic earnings per common share (in dollars per share)	$ 0.34	$ 0.02	$ 0.92	$ 0.28
Basic weighted-average shares outstanding (in shares)	50,838	41,565	50,717	41,369
Diluted earnings per common share (in dollars per share)	$ 0.32	$ 0.02	$ 0.88	$ 0.26
Diluted weighted-average shares outstanding (in shares)	53,264	43,734	53,211	43,826
Dividends paid per common share (in dollars per share)	$ 0.08	$ 0.075	$ 0.16	$ 0.15
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments	$ 1,739	$ (16,471)	$ 13,862	$ (10,001)
Pension and other post retirement plans	1,245	669	2,951	1,341
Change in cash flow hedges	1,791	968	1,103	667
Total other comprehensive income (loss), net of taxes	4,775	(14,834)	17,916	(7,993)
Comprehensive income, net	$ 21,887	$ (13,939)	$ 64,528	$ 3,514

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 46,612	$ 11,507
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	31,149	31,544
Stock-based compensation	9,501	8,302
Asset impairment charges - restructuring	8,291	4,692
Provision for losses on accounts receivable	194	596
Amortization of debt discounts and issuance costs	1,349	2,267
Loss from debt extinguishment, net	0	6,690
Deferred income taxes	2,334	408
Loss (gain) on sale of assets and investments	151	(274)
Gain on sale of business	(5,291)	0
Change in assets and liabilities, net of assets and liabilities acquired:
Increase in accounts receivable and contract assets, net	(47,146)	(61,815)
Increase in inventories	(74,186)	(21,262)
(Increase) decrease in prepaid and other assets	271	(6,005)
Increase (decrease) in accounts payable, accrued liabilities, income taxes payable and operating lease liabilities	(1,470)	(38,053)
Other changes, net	2,400	560
Net cash used in operating activities	(25,841)	(60,843)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(23,986)	(22,519)
Acquired businesses, net of cash acquired	(2,242)	(10,531)
Proceeds from sale of business, net	14,725	0
Investment purchases	(2,138)	0
Proceeds from the sale of property, plant and equipment	82	290
Other, net	27	0
Net cash used in investing activities	(13,532)	(32,760)
CASH FLOWS FROM FINANCING ACTIVITIES:
Dividends paid	(8,678)	(7,349)
Purchase of shares for treasury	(2,909)	(7,479)
Proceeds from long-term debt	14,029	1,061,343
Payments of long-term debt	(7,573)	(939,071)
Financing costs	(571)	(13,176)
Other, net	(214)	83
Net cash provided by (used in) financing activities	(5,916)	94,351
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in operating activities	(1,512)	(1,994)
Net cash provided by investing activities	2,749	0
Net cash provided by (used in) discontinued operations	1,237	(1,994)
Effect of exchange rate changes on cash and equivalents	1,527	(2,107)
NET DECREASE IN CASH AND EQUIVALENTS	(42,525)	(3,353)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	218,089	72,377
CASH AND EQUIVALENTS AT END OF PERIOD	$ 175,564	$ 69,024

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

6 Months Ended

Mar. 31, 2021

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 in connection with divestitures. In order to further diversify, Griffon also seeks out, evaluates and, when appropriate, will acquire additional businesses that offer potentially attractive returns on capital.

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 currently conducts its operations through three reportable segments:

•Consumer and Professional Products ("CPP") conducts its operations through The AMES Companies, Inc. ("AMES"). Founded in 1774, AMES is the leading North American manufacturer and a global provider of branded consumer and professional tools and products for home storage and organization, landscaping, and enhancing outdoor lifestyles. CPP sells products globally through a portfolio of leading brands including True Temper, AMES, and ClosetMaid.

•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 CornellCookson brand.

•Defense Electronics ("DE") conducts its operations through Telephonics Corporation ("Telephonics"), founded in 1933, a globally recognized leading provider of highly sophisticated intelligence, surveillance and communications solutions for defense, aerospace and commercial customers.

In March 2020, the World Health Organization declared the outbreak of COVID-19 a pandemic, which continues to spread throughout the U.S. and the world. The impact from the rapidly changing U.S. and global market and economic conditions due to the COVID-19 outbreak is uncertain, with disruptions to the business of our customers and suppliers, which could impact our business and consolidated results of operations and financial condition in the future. While we have not incurred significant disruptions to our manufacturing or to our supply chain thus far from the COVID-19 outbreak, we are unable to accurately predict the impact COVID-19 will have due to numerous uncertainties, including the severity of the disease, the duration of the outbreak, actions that may be taken by governmental authorities, the impact to our customers’ and suppliers’ businesses and other factors identified in Part II, Item 1A “Risk Factors” in this Form 10-Q. We will continue to evaluate the nature and extent of the impact to our business, consolidated results of operations, and financial condition.

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 year ended September 30, 2020, 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 CPP operations 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, 2020 was derived from the audited financial statements included in Griffon’s Annual Report on Form 10-K for the year ended September 30, 2020.

The condensed consolidated financial statements include the accounts of Griffon and all subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

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. Significant estimates include allowances for doubtful accounts receivable and returns, net realizable value of inventories, restructuring reserves, valuation of goodwill and intangible assets, sales, profits and loss recognition for performance obligations satisfied over time, 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, assumption 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, assumptions associated with valuation of acquired assets and assumed liabilities of acquired companies 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.

Certain amounts in the prior year have been reclassified to conform to current year presentation.

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FAIR VALUE MEASUREMENTS

6 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

The carrying values of cash and equivalents, accounts receivable, accounts and notes payable, and revolving credit and variable interest rate debt approximate fair value due to either the short-term nature of such instruments or the fact that the interest rate of the revolving credit and variable rate debt is based upon current market rates.

Applicable accounting guidance establishes a fair value hierarchy requiring the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the hierarchy is based on the lowest level of input that is significant to the fair value measurement. The accounting guidance establishes three levels of inputs that may be used to measure fair value, as follows:

•Level 1 inputs are measured and recorded at fair value based upon quoted prices in active markets for identical assets.

•Level 2 inputs include inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities.

•Level 3 inputs are unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The fair values of Griffon’s 2028 senior notes approximated $1,060,000 on March 31, 2021. Fair values were based upon quoted market prices (level 1 inputs).

Insurance contracts with values of $3,821 at March 31, 2021 are measured and recorded at fair value based upon quoted prices in active markets for similar assets (level 2 inputs) and are included in Prepaid and other current assets on the Consolidated Balance Sheets.

Items Measured at Fair Value on a Recurring Basis

At March 31, 2021, trading securities, measured at fair value based on quoted prices in active markets for similar assets (level 2 inputs), with a fair value of $2,088 ($1,000 cost basis), were included in Prepaid and other current assets on the Consolidated Balance Sheets. Realized and unrealized gains and losses on trading securities are included in Other income in the Consolidated Statements of Operations and Comprehensive Income (Loss).

In the normal course of business, Griffon’s operations are exposed to the effects of changes in foreign currency exchange rates. To manage these risks, Griffon may enter into various derivative contracts such as foreign currency exchange contracts, including forwards and options. As of March 31, 2021, Griffon entered into several such contracts in order to lock into a foreign currency rate for planned settlements of trade and inter-company liabilities payable in US dollars.

At March 31, 2021, Griffon had $61,000 of Australian dollar contracts at a weighted average rate of $1.29 which qualified for hedge accounting (level 2 inputs). These hedges were all deemed effective as cash flow hedges with gains and losses related to changes in fair value deferred and recorded in Accumulated other comprehensive income (loss) ("AOCI") and Prepaid and other current assets, or Accrued liabilities, until settlement. Upon settlement, gains and losses are recognized in the Consolidated Statements of Operations and Comprehensive Income (Loss) in Cost of goods and services ("COGS"). AOCI included deferred losses of $831 ($582, net of tax) at March 31, 2021. Upon settlement, losses of $1,741 and $2,399 were recorded in COGS during the three and six months ended March 31, 2021, respectively. All contracts expire in 30 to 180 days.

At March 31, 2021, Griffon had $7,935 of Canadian dollar contracts at a weighted average rate of $1.30. The contracts, which protect Canadian operations from currency fluctuations for US dollar based purchases, do not qualify for hedge accounting. For the three and six months ended March 31, 2021, fair value gains of $520 and $244, respectively, were recorded to Other liabilities and to Other income for the outstanding contracts, based on similar contract values (level 2 inputs). Realized losses of $102 and $161 were recorded in Other income during the three and six months ended March 31, 2021, respectively, for all settled contracts. All contracts expire in 29 to 450 days.

At March 31, 2021, Griffon had $5,200 of British Pound dollar contracts at a weighted average rate of $0.75. The contracts, which protect United Kingdom operations from currency fluctuations for US dollar based purchases, do not qualify for hedge accounting. For the three and six months ended March 31, 2021, fair value gains of $386 and $141, respectively, were recorded to Other assets and to Other income for the outstanding contracts, based on similar contract values (level 2 inputs). Realized losses of $211 and $281 were recorded in Other income during the three and six months ended March 31, 2021, respectively. All contracts expire in 6 to 104 days.

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REVENUE

6 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

REVENUE

REVENUEThe Company recognizes revenue when performance obligations identified under the terms of contracts with its customers are satisfied. A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer, and is the unit of accounting. A contract with a customer is an agreement which both parties have approved, that creates enforceable rights and obligations, has commercial substance and with respect to which payment terms are identified and collectability is probable. Once the Company has entered into a contract or purchase order, it is evaluated to identify performance obligations. For each performance obligation, revenue is recognized when control of the promised products is transferred to the customer, or services are satisfied under the contract or purchase order, in an amount that reflects

the consideration the Company expects to be entitled to in exchange for those products or services (the transaction price).

Approximately 86% of the Company’s performance obligations are recognized at a point in time related to the manufacture and sale of a broad range of products and components primarily within the CPP and HBP Segments, and revenue is recognized when title, and risk and rewards of ownership, have transferred to the customer, which is generally upon shipment.

Approximately 14% of the Company’s performance obligations are recognized over time and relate to prime or subcontractors from contract awards with the U.S. Government, as well as foreign governments and other commercial customers within our DE Segment. Revenue recognized over time are generally accounted for using an input measure to determine progress completed at the end of the period. We believe that cumulative costs incurred to date as a percentage of estimated total contract costs at completion (cost-to-cost method) is an appropriate measure of progress towards satisfaction of performance obligations recognized over time, as it most accurately depicts the progress of our work and transfer of control to our customers.

Accounting for the sales and profits on performance obligations for which progress is measured using the cost-to-cost method relies on the substantial use of estimates; these projections may be revised throughout the life of a contract. Adjustments to estimates for a contract's estimated costs at completion and estimated profit or loss are often required as experience is gained, more information is obtained (even though the scope of work required under the contract may or may not change) and contract modifications occur. The impact of such adjustments to estimates is made on a cumulative basis in the period when such information has become known. For the three and six months ended March 31, 2021, income from operations included net unfavorable catch up adjustments approximating $1,423 and $3,220, respectively. For the three and six months ended March 31, 2020, income from operations included net unfavorable catch up adjustments of $2,188 and $422, respectively. Gross profit is impacted by a variety of factors, including the mix of products, systems and services, production efficiencies, price competition and general economic conditions.

For contracts in which anticipated total costs exceed the total expected revenue, an estimated loss is recognized in the period when identifiable. A provision for the entire amount of the estimated loss is recorded on a cumulative basis, and is recorded as a reduction to gross margin on the Consolidated Statements of Operations and Comprehensive Income (Loss). These provisions had an immaterial impact on Griffon's Consolidated Financial Statements. The estimated remaining costs to complete loss contracts as of March 31, 2021 and September 30, 2020 were approximately $8,500 and $10,800, respectively.

For a complete explanation of Griffon’s revenue accounting policies, this note should be read in conjunction with Griffon’s Annual Report on Form 10-K for the year ended September 30, 2020. See Note 13 - Business Segments for revenue from contracts with customers disaggregated by end markets, segments and geographic location.

Transaction Price Allocated to the Remaining Performance Obligations

On March 31, 2021, we had $353,870 of remaining performance obligations, which we also refer to as total backlog. We expect to recognize approximately 65% of our remaining performance obligations as revenue within one year, with the balance to be completed thereafter.

Backlog represents the dollar value of funded orders for which work has not been performed. Backlog generally increases with bookings, and converts into revenue as we incur costs related to contractual commitments or the shipment of product. Given the nature of our business and a larger dependency on international customers, our bookings, and therefore our backlog, is impacted by the longer maturation cycles resulting in delays in the timing and amounts of such awards, which are subject to numerous factors, including fiscal constraints placed on customer budgets; political uncertainty; the timing of customer negotiations; and the timing of governmental approvals.

Contract Balances

Contract assets were $75,000 as of March 31, 2021 compared to $84,426 as of September 30, 2020. The $9,426 net decrease in our contract assets balance was primarily due to the timing of billings and work performed in Surveillance programs and decrease associated with the sale of Systems Engineering Group, Inc. ("SEG"). Contract assets primarily relate to the Company's right to consideration for work completed but not billed at the reporting date and are recorded in Contract costs and recognized income not yet billed, net of progress payments in the Consolidated Balance Sheets. Contract assets are transferred to receivables when the right to consideration becomes unconditional. Contract costs and recognized income not yet billed

consists of amounts accounted for under the percentage of completion method of accounting, and represent recoverable costs and accrued profit that cannot yet be invoiced under the terms of certain long-term contracts. Amounts will be invoiced when applicable contract terms, such as the achievement of specified milestones or product delivery, are met. At March 31, 2021 and September 30, 2020, approximately $7,700 and $7,500, respectively, of contract costs and recognized income not yet billed were expected to be collected after one year. Contract liabilities were $22,964 as of March 31, 2021 compared to $24,386 as of September 30, 2020. The $1,422 decrease in the contract liabilities balance was primarily due to recognition of revenue in Naval & Cyber systems, partially offset by billings in Surveillance and Communications programs. Contract liabilities relate to advance consideration received from customers for which revenue has not been recognized. The Company often receives cash payments from customers in advance of the Company’s performance resulting in contract liabilities. These contract liabilities are classified as current on the Consolidated Balance Sheets based on the timing of when the Company expects to recognize revenue. Current contract liabilities are recorded in Accounts payable on the Consolidated Balance Sheets. Contract liabilities are reduced when the associated revenue from the contract is recognized.

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ACQUISITIONS AND DISPOSITIONS

6 Months Ended

Mar. 31, 2021

Business Combinations [Abstract]

ACQUISITIONS AND DISPOSITIONS

ACQUISITIONS AND DISPOSITIONS

Acquisitions

Griffon accounts for acquisitions under the acquisition method, in which assets acquired and liabilities assumed are recorded at fair value as of the date of acquisition using a method substantially similar to the goodwill impairment test methodology (level 3 inputs). The operating results of the acquired companies are included in Griffon’s consolidated financial statements from the date of acquisition; in each instance, Griffon is in the process of finalizing the initial purchase price allocation unless otherwise noted.

On December 22, 2020, AMES acquired Quatro Design Pty Ltd (“Quatro”), a leading Australian manufacturer and supplier of glass fiber reinforced concrete landscaping products for residential, commercial, and public sector projects for a purchase price of AUD $3,500 (approximately $2,700) in cash. The purchase price is subject to additional contingent consideration of approximately AUD $1,000 (approximately $760) based on Quatro exceeding certain EBITDA performance targets in the first year. The preliminary acquired intangibles and goodwill allocated to this acquisition was AUD $2,755 (approximately $2,082) and AUD $1,648 (approximately $1,246), respectively, which was assigned to the CPP segment, and is not deductible for income tax purposes.

On November 29, 2019, AMES acquired 100% of the outstanding stock of Vatre Group Limited ("Apta"), a leading United Kingdom supplier of innovative garden pottery and associated products sold to leading UK and Ireland garden centers for approximately $10,500 (GBP 8,750), inclusive of a post-closing working capital adjustment, net of cash acquired. This acquisition broadens AMES' product offerings in the UK market and increases its in-country operational footprint. The excess of the purchase price over the fair value of the net tangible and intangible assets was recorded as goodwill and is deductible for tax purposes. The purchase price allocation was finalized and allocated to goodwill of GBP 3,449, acquired intangible assets of GBP 3,454, inventory of GBP 2,914, accounts receivable and other assets of GBP 2,492 and accounts payable and other accrued liabilities of GBP 3,765, which was assigned to the CPP segment.

During the three and six months ended March 31, 2021, acquisition costs were de minimis. During both the three and six months ended March 31, 2020, the Company incurred acquisition costs of $2,960.

Dispositions

On December 18, 2020, Defense Electronics completed the sale of its SEG business for $15,000. SEG provides sophisticated, highly technical engineering and analytical support to the Missile Defense Agency and various U.S. military commands. SEG had sales of approximately $7,000 for the first fiscal quarter ended December 31, 2020 and $31,000 for the fiscal year ended September 30, 2020. DE recorded a pre-tax gain of $5,291 ($5,251, net of tax, or $0.10 per share) related to the divestiture of SEG. The sale does not represent a strategic shift that will have a major effect on operations and financial results.

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INVENTORIES

6 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

INVENTORIES

INVENTORIES

Inventories are stated at the lower of cost (first-in, first-out or average cost) or market.

The following table details the components of inventory:

	At March 31, 2021		At September 30, 2020
Raw materials and supplies	$	155,720	$	146,351
Work in process	86,299		83,697
Finished goods	242,734		183,777
Total	$	484,753	$	413,825

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PROPERTY, PLANT AND EQUIPMENT

6 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

The following table details the components of property, plant and equipment, net:

	At March 31, 2021		At September 30, 2020
Land, building and building improvements	$	169,081	$	167,005
Machinery and equipment	611,187		595,126
Leasehold improvements	53,952		53,386
	834,220		815,517
Accumulated depreciation and amortization	(493,215)		(471,553)
Total	$	341,005	$	343,964

Depreciation and amortization expense for property, plant and equipment was $13,450 and $13,316 for the quarters ended March 31, 2021 and 2020, respectively, and $26,338 and $26,748 for the six months ended March 31, 2021 and 2020, respectively. Depreciation included in Selling, general and administrative ("SG&A") expenses was $5,014 and $4,910 for the quarters ended March 31, 2021 and 2020, respectively, and $9,720 and $9,861 for the six months ended March 31, 2021 and 2020, respectively. Remaining components of depreciation, attributable to manufacturing operations, are included in Cost of goods and services.

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CREDIT LOSSES

6 Months Ended

Mar. 31, 2021

Credit Loss [Abstract]

CREDIT LOSSES

CREDIT LOSSES

Effective October 1, 2020, the Company adopted accounting guidance related to accounting for credit losses on financial instruments, including trade receivables (ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments). The guidance requires companies to consider forward-looking information to estimate expected credit losses, resulting in earlier recognition of losses for receivables that are current or not yet due, which were not considered under the previous accounting guidance.

The Company is exposed to credit losses primarily through sales of products and services. Trade receivables are recorded at their stated amount, less allowances for discounts, doubtful accounts and returns. The Company’s expected loss allowance methodology for trade receivables is primarily based on the aging method of the accounts receivables balances and the financial condition of its customers. The allowances represent estimated uncollectible receivables associated with potential customer defaults on contractual obligations (usually due to customers’ potential insolvency), discounts related to early payment of accounts receivables by customers and estimates for returns. The allowance for doubtful accounts includes amounts for certain customers in which a risk of default has been specifically identified, as well as an amount for customer defaults, based on a formula, when it is determined the risk of some default is probable and estimable, but cannot yet be associated with specific customers. Allowance for discounts and returns are recorded as a reduction of revenue and the provision related to the allowance for doubtful accounts is recorded in SG&A expenses.

The Company also considers current and expected future economic and market conditions, such as the COVID-19 pandemic, when determining any estimate of credit losses. Generally, estimates used to determine the allowance are based on assessment of anticipated payment and all other historical, current and future information that is reasonably available. All accounts receivable amounts are expected to be collected in less than one year.

Based on a review of the Company's policies and procedures across all segments, including the aging of its trade receivables, recent write-off history and other factors related to future macroeconomic conditions, Griffon determined that its method to determine credit losses and the amount of its allowances for bad debts is in accordance with this guidance in all material respects.

The following table provides a roll-forward of the allowance for credit losses that is deducted from the amortized cost basis of accounts receivable to present the net amount expected to be collected:

Beginning Balance, October 1, 2020	$	8,505
Provision for expected credit losses	1,228
Amounts written off charged against the allowance	(161)
Other, primarily foreign currency translation	22
Ending Balance, March 31, 2021	$	9,594

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GOODWILL AND OTHER INTANGIBLES

6 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLES

GOODWILL AND OTHER INTANGIBLES

The following table provides changes in the carrying value of goodwill by segment during the six months ended March 31, 2021:

	At September 30, 2020		Business Acquisitions (a)		Business Divestitures (b)		Foreign  currency translations adjustments		At March 31, 2021
Consumer and Professional Products	$	232,845	$	1,246	$	—	$	3,287	$	237,378
Home and Building Products	191,253		—		—		—		191,253
Defense Electronics	18,545		—		(811)		—		17,734
Total	$	442,643	$	1,246	$	(811)	$	3,287	$	446,365

(a) The increase in the CPP segment was due to the acquisition of Quatro.

(b) The decrease in the DE segment was due to the divestiture of SEG.

The following table provides the gross carrying value and accumulated amortization for each major class of intangible assets:

	At March 31, 2021					At September 30, 2020
	Gross Carrying Amount		Accumulated Amortization		Average Life (Years)	Gross Carrying Amount		Accumulated Amortization
Customer relationships & other	$	189,189	$	71,840	23	$	185,940	$	66,656
Technology and patents	19,529		8,030		13	19,464		8,360
Total amortizable intangible assets	208,718		79,870			205,404		75,016
Trademarks	228,658		—			224,640		—
Total intangible assets	$	437,376	$	79,870		$	430,044	$	75,016

The gross carrying amount of intangible assets was impacted by approximately $5,250 related to foreign currency translation.

Amortization expense for intangible assets was $2,433 and $2,403 for the quarters ended March 31, 2021 and 2020, respectively, and $4,811 and $4,796 for the six months ended March 31, 2021 and 2020. Amortization expense for the remainder of 2021 and the next five fiscal years and thereafter, based on current intangible balances and classifications, is estimated as follows: 2021 - $4,574; 2022 - $9,376; 2023 - $9,224; 2024 - $9,198; 2025 - $9,198; 2026 - $9,198; thereafter $78,080.

Griffon performs its annual goodwill impairment testing in the fourth quarter of each year. The 2020 impairment testing resulted in all three reporting units having fair values substantially in excess of their carrying values. In addition to the annual impairment test, the Company is required to regularly assess whether a triggering event has occurred which would require interim impairment testing. In connection with the sale of the SEG business, the Company assessed the remaining DE reporting unit for impairment. The assessment determined that the fair value of the DE reporting unit substantially exceeded its carrying value and no impairment existed. During the six months ended March 31, 2021, the Company determined that there were no other triggering events and, as a result, there was no impairment to either its goodwill or indefinite-lived intangible assets at March 31, 2021.

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INCOME TAXES	6 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXESDuring the quarter ended March 31, 2021, the Company recognized a tax provision of $10,748 on income before taxes of $27,860, compared to a tax provision of $2,034 on income before taxes of $2,929 in the comparable prior year quarter. The current year quarter results included restructuring charges of $7,562 ($5,651, net of tax), reduction to gain on sale of the SEG business of $949 ($766, net of tax) and discrete and certain other tax provisions, net, that affect comparability of $1,913. The prior year quarter results included restructuring charges of $3,104 ($3,005, net of tax), acquisition costs of $2,960 ($2,321, net of tax), loss from debt extinguishment of $6,690 ($5,245, net of tax) and discrete tax and certain other tax benefits, net, that affect comparability of $1,413. Excluding these items, the effective tax rates for the quarters ended March 31, 2021 and 2020 were 30.0% and 35.9%, respectively.During the six months ended March 31, 2021, the Company recognized a tax provision of $20,417 on Income before taxes of $67,029, compared to a tax provision of $8,373 on income before taxes of $19,880 in the comparable prior year period. The six month period ended March 31, 2021 included restructuring charges of $18,362 ($13,951, net of tax), gain on sale of the SEG business of $5,291 ($5,251, net of tax) and discrete and certain other tax benefits, net, that affect comparability of $115. The six month period ended March 31, 2020 included restructuring charges of $9,538 ($7,153, net of tax), acquisition costs of $2,960 ($2,321, net of tax), loss from debt extinguishment of $6,690 ($5,245, net of tax) and discrete tax and certain other tax benefits, net, that affect comparability of $580. Excluding these items, the effective tax rates for the six months ended March 31, 2021 and 2020 were 31.1% and 34.4%, respectively.

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LONG-TERM DEBT

6 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

LONG-TERM DEBT

LONG-TERM DEBT

		At March 31, 2021										At September 30, 2020
		Outstanding Balance		Original Issuer Premium		Capitalized Fees & Expenses		Balance Sheet		Coupon Interest Rate		Outstanding Balance		Original Issuer Premium		Capitalized Fees & Expenses		Balance Sheet		Coupon Interest Rate
Senior notes due 2028	(a)	$	1,000,000	$	339	(14,329)		$	986,010	5.75	%	$	1,000,000	$	363	$	(15,376)	$	984,987	5.75	%
Revolver due 2025	(b)	20,622		—		(1,963)		18,659		Variable		12,858		—		(2,209)		10,649		Variable
Finance lease - real estate	(c)	15,924		—		(17)		15,907		5.60	%	17,218		—		(30)		17,188		5.60	%
Non US lines of credit	(d)	4,405		—		(24)		4,381		Variable		—		—		(30)		(30)		Variable
Non US term loans	(d)	29,870		—		(133)		29,737		Variable		31,086		—		(160)		30,926		Variable
Other long term debt	(e)	4,094		—		(16)		4,078		Variable		3,260		—		(16)		3,244		Variable
Totals		1,074,915		339		(16,482)		1,058,772				1,064,422		363		(17,821)		1,046,964
less: Current portion		(14,913)		—		—		(14,913)				(9,922)		—		—		(9,922)
Long-term debt		$	1,060,002	$	339	$	(16,482)	$	1,043,859			$	1,054,500	$	363	$	(17,821)	$	1,037,042

		Three Months Ended March 31, 2021										Three Months Ended March 31, 2020
		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense
Senior notes due 2028	(a)	6.0	%	$	14,375	$	12	$	505	$	14,892	6.0	%	$	5,566	$	—	$	135	$	5,701
Senior notes due 2022	(a)	—		—		—		—		—		5.7	%	8,040		45		628		8,713
Revolver due 2025	(b)	Variable		287		—		122		409		Variable		1,819		—		165		1,984
Finance lease - real estate	(c)	5.9	%	224		—		7		231		6.1	%	52		—		7		59
Non US lines of credit	(d)	Variable		4		—		4		8		Variable		3		—		8		11
Non US term loans	(d)	Variable		163		—		18		181		Variable		292		—		7		299
Other long term debt	(e)	Variable		115		—		1		116		Variable		132		—		—		132
Capitalized interest				(6)		—		—		(6)				(28)		—		—		(28)
Totals				$	15,162	$	12	$	657	$	15,831			$	15,876	$	45	$	950	$	16,871

		Six Months Ended March 31, 2021										Six Months Ended March 31, 2020
		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense
Senior notes due 2028	(a)	6.0	%	$	28,750	$	24	$	1,023	$	29,797	6.0	%	$	5,566	$	—	$	135	$	5,701
Senior notes due 2022	(a)	—		—		—		—		—		5.7	%	21,165		112		1,579		22,856
Revolver due 2025	(b)	Variable		416		—		245		661		Variable		3,201		—		397		3,598
Finance lease - real estate	(c)	5.6	%	456		—		13		469		6.0	%	113		—		13		126
Non US lines of credit	(d)	Variable		7		—		8		15		Variable		7		—		12		19
Non US term loans	(d)	Variable		334		—		35		369		Variable		564		—		19		583
Other long term debt	(e)	Variable		222		—		1		223		Variable		292		—		—		292
Capitalized interest				(13)		—		—		(13)				(93)		—		—		(93)
Totals				$	30,172	$	24	$	1,325	$	31,521			$	30,815	$	112	$	2,155	$	33,082

(a)    On June 22, 2020, in an unregistered offering through a private placement, Griffon completed the add-on offering of $150,000 principal amount of its 5.75% Senior Notes, at 100.25% of par, to Griffon's previously issued $850,000 principal amount of its 5.75% Senior Notes, at par, completed on February 19, 2020 (collectively, the “Senior Notes”). Proceeds from the Senior Notes were used to redeem the $1,000,000 of 5.25% 2022 senior notes. As of March 31, 2021, outstanding Senior Notes due totaled $1,000,000; interest is payable semi-annually on March 1 and September 1.

The Senior Notes are senior unsecured obligations of Griffon guaranteed by certain domestic subsidiaries, and subject to certain covenants, limitations and restrictions. On April 22, 2020 and August 3, 2020, Griffon exchanged substantially all of the Senior Notes for substantially identical Senior Notes registered under the Securities Act of 1933, as amended (the "Securities Act"), via an exchange offer. The fair value of the Senior Notes approximated $1,060,000 on March 31, 2021 based upon quoted market prices (level 1 inputs).

In connection with these transactions, Griffon capitalized $16,448 of underwriting fees and other expenses incurred related to the issuance and exchange of the 2028 Senior Notes, which is being amortized over the term of the 2028 Senior Notes. Furthermore, all of the obligations associated with the 2022 Senior Notes were discharged. Additionally, Griffon recognized a $7,925 loss on the early extinguishment of debt of the $1,000,000 principal amount of 2022 Senior Notes, comprised primarily of the write-off of $6,725 of remaining deferred financing fees, $607 of tender offer net premium expense and $593 of redemption interest expense.

(b)     On January 30, 2020, Griffon amended its revolving credit facility (as amended, the "Credit Agreement") to increase the maximum borrowing availability from $350,000 to $400,000, and extend its maturity date from March 22, 2021 to March 22, 2025 and modify certain other provisions of the facility. The facility includes a letter of credit sub-facility with a limit of $100,000; a multi-currency sub-facility of $200,000; and contains a customary accordion feature that permits us to request, subject to each lender's consent, an increase in the maximum aggregate amount that can be borrowed by up to an additional $100,000.

    Borrowings under the Credit Agreement may be repaid and re-borrowed at any time. Interest is payable on borrowings at either a LIBOR or base rate benchmark rate, plus an applicable margin, which adjusts based on financial performance. Current margins are 0.50% for base rate loans and 1.50% for LIBOR loans. The Credit Agreement has certain financial maintenance tests including a maximum total leverage ratio, a maximum senior secured leverage ratio and a minimum interest coverage ratio, as well as customary affirmative and negative covenants, and events of default. The negative covenants place limits on Griffon's ability to, among other things, incur indebtedness, incur liens, and make restricted payments and investments. Borrowings under the Credit Agreement are guaranteed by Griffon’s material domestic subsidiaries and are secured, on a first priority basis, by substantially all domestic assets of the Company and the guarantors, and a pledge of not greater than 65% of the equity interest in Griffon’s material, first-tier foreign subsidiaries. At March 31, 2021, there were $20,622 of outstanding borrowings under the Credit Agreement; outstanding standby letters of credit were $16,310; and $363,068 was available, subject to certain loan covenants, for borrowing at that date.

(c)    Two Griffon subsidiaries have finance leases outstanding for real estate located in Troy, Ohio and Ocala, Florida. The leases mature in 2021 and 2025, respectively, and bear interest at fixed rates of approximately 5.0% and 5.6%, respectively. The Troy, Ohio lease is secured by a mortgage on the real estate and is guaranteed by Griffon. The Ocala, Florida lease contains two five-year renewal options. At March 31, 2021, $15,907 was outstanding, net of issuance costs. Refer to Note 21- Leases for further details.

(d)     In November 2012, Garant G.P. (“Garant”), a Griffon wholly owned subsidiary, entered into a CAD 15,000 ($11,894 as of March 31, 2021) revolving credit facility. The facility accrues interest at LIBOR (USD) or the Bankers Acceptance Rate (CDN) plus 1.3% per annum (1.41% LIBOR USD and 1.47% Bankers Acceptance Rate CDN as of March 31, 2021). The revolving facility matures in October 2022. Garant is required to maintain a certain minimum equity.  At March 31, 2021, there were no borrowings under the revolving credit facility with CAD 15,000 ($11,894 as of March 31, 2021) available for borrowing.

In July 2016, Griffon Australia Holdings Pty Ltd and its Australian subsidiaries (collectively, "Griffon Australia") entered into an AUD 29,625 term loan, AUD 20,000 revolver and AUD 10,000 receivable purchase facility agreement. The term loan requires quarterly principal payments of AUD 1,250 plus interest with a balloon payment of AUD 9,625 due upon maturity in March 2022, and accrues interest at Bank Bill Swap Bid Rate “BBSY” plus 1.95% per annum (2.01% at March 31, 2021). During fiscal 2020, the term loan balance was reduced by AUD 5,000, from AUD 23,375 to AUD 18,375 with proceeds from an AUD 5,000 increase in the commitment of the receivables purchase line from AUD 10,000 to AUD 15,000. As of March 31, 2021, the term loan had an outstanding balance of AUD 13,375 ($10,192 as of March 31, 2021). The revolving facility and receivable purchase facility mature in March 2022, but are renewable upon mutual agreement with the lender. The revolving facility and receivable purchase facility accrue interest at BBSY plus 1.9% and 1.35%, respectively, per annum (1.98% and 1.41%, respectively, at March 31, 2021). At March 31, 2021, there were no balances outstanding under the revolver and the receivable purchase facility. The revolver, receivable purchase facility and the term loan are all secured by substantially all of the assets of Griffon Australia and its subsidiaries. Griffon Australia is required to maintain a certain minimum equity level and is subject to a maximum leverage ratio and a minimum fixed charges cover ratio.

In July 2018, The AMES Companies UK Ltd and its subsidiaries (collectively, "AMES UK") entered into a GBP 14,000 term loan, GBP 4,000 mortgage loan and GBP 5,000 revolver. The term loan and mortgage loan require quarterly principal payments of GBP 438 and GBP 105 plus interest, respectively, and have balloon payments due upon maturity, July 2023, of GBP 7,088 and GBP 2,349, respectively. The Term Loan and Mortgage Loans each accrue interest at the GBP LIBOR Rate plus 1.8% ( 1.85% at March 31, 2021). The revolving facility matures in May 2021, but is renewable upon mutual agreement with the lender, and accrues interest at the Bank of England Base Rate plus 1.5% (1.60% as of March 31, 2021). As of March 31, 2021, the revolver had an outstanding balance of GBP $3,204 ($4,405 as of March 31, 2021) while the term and mortgage loan balances amounted to GBP 14,313 ($19,678 as of March 31, 2021). The revolver and the term loan are both secured by substantially all of the assets of AMES UK and its subsidiaries. AMES UK is subject to a maximum leverage ratio and a minimum fixed charges cover ratio. An invoice discounting arrangement was canceled and replaced by the above loan facilities.

(e)     Other long-term debt primarily consists of a loan with the Pennsylvania Industrial Development Authority, with the balance consisting of finance leases.

On March 13, 2019, Griffon's Employee Stock Ownership Plan entered into an agreement that refinanced a term loan with a bank with an internal loan from Griffon. The internal loan interest rate is fixed at 2.91%, matures in June 2033 and requires quarterly payments of principal, currently $635, and interest. The internal loan is secured by shares purchased with the proceeds of the loan. The amount outstanding on the internal loan at March 31, 2021 was $28,608.

At March 31, 2021, Griffon and its subsidiaries were in compliance with the terms and covenants of all credit and loan agreements.

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SHAREHOLDERS' EQUITY

6 Months Ended

Mar. 31, 2021

Stockholders' Equity Note [Abstract]

SHAREHOLDERS' EQUITY

SHAREHOLDERS’ EQUITY

During 2021, the Company paid a quarterly cash dividend of $0.08 per share in each quarter, totaling $0.16 per share for the six months ended March 31, 2021. During 2020, the Company paid a quarterly cash dividend of $0.075 per share, totaling $0.30 per share for the year. A dividend payable was established for the holders of restricted shares; such dividends will be released upon vesting of the underlying restricted shares.

On April 29, 2021, the Board of Directors declared a quarterly cash dividend of $0.08 per share, payable on June 17, 2021 to shareholders of record as of the close of business on May 20, 2021.

Compensation expense for restricted stock and restricted stock units is recognized ratably over the required service period based on the fair value of the grant, calculated as the number of shares granted multiplied by the stock price on the date of grant and, for performance shares, the likelihood of achieving the performance criteria. Compensation expense for restricted stock granted to two senior executives is calculated as the maximum number of shares granted, upon achieving certain performance criteria, multiplied by the stock price as valued by a Monte Carlo Simulation Model. Compensation cost related to stock-based awards

with graded vesting, generally over a period of three to four years, is recognized using the straight-line attribution method and recorded within SG&A expenses.

On January 29, 2016, shareholders approved the Griffon Corporation 2016 Equity Incentive Plan ("Incentive Plan") under which awards of performance shares, performance units, stock options, stock appreciation rights, restricted shares, restricted stock units, deferred shares and other stock-based awards may be granted. On January 31, 2018, shareholders approved Amendment No. 1 to the Incentive Plan pursuant to which, among other things, 1,000,000 shares were added to the Incentive Plan; and on January 30, 2020, shareholders approved Amendment No. 2 to the Incentive Plan, pursuant to which 1,700,000 shares were added to the Incentive Plan. Options granted under the Incentive Plan may be either “incentive stock options” or nonqualified stock options, generally expire ten years after the date of grant and are granted at an exercise price of not less than 100% of the fair market value at the date of grant. The maximum number of shares of common stock available for award under the Incentive Plan is 5,050,000 (600,000 of which may be issued as incentive stock options), plus (i) any shares reserved for issuance under the 2011 Equity Incentive Plan as of the effective date of the Incentive Plan, and (ii) any shares underlying awards outstanding on such effective date under the 2011 Incentive Plan that are canceled or forfeited. As of March 31, 2021, there were 437,276 shares available for grant.

During the first quarter of 2021, Griffon granted 511,624 shares of restricted stock and restricted stock units. This included 226,811 restricted stock and restricted stock units, subject to certain performance conditions, with vesting periods of three years, with a total fair value of $5,500, or a weighted average fair value of $24.25 per share. Furthermore, this included 284,813 restricted stock awards granted to five executives, with vesting periods of three years and a total fair value of $5,913 or a weighted average fair value of $20.76 per share.

During the second quarter of 2021, Griffon granted 731,282 shares of restricted stock to six executives. This included 203,282 shares of restricted stock to four executives, subject to certain performance conditions, with vesting periods ranging from 34 months to 60 months, with a total fair value of $4,923, or a weighted average fair value of $24.22 per share. This also included 528,000 shares of restricted stock granted to two senior executives with a vesting period of four years and a two-year post-vesting holding period, subject to the achievement of certain absolute and relative performance conditions relating to the price of Griffon's common stock. So long as the minimum performance condition is attained, the amount of shares that can vest will range from 384,000 to 528,000. The total fair value of these restricted shares using the Monte Carlo Simulation model is approximately $7,824, or a weighted average fair value of $14.82 per share. Additionally, Griffon granted 44,424 restricted shares to the non-employee directors of Griffon with a vesting period of three years and a fair value of $1,080, or a weighted average fair value of $24.31 per share.

The following table summarizes the Company’s compensation expense relating to all stock-based incentive plans:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Restricted stock	$	4,349	$	3,662	$	7,777	$	6,812
ESOP	944		658		1,724		1,490
Total stock based compensation	$	5,293	$	4,320	$	9,501	$	8,302

On each of August 3, 2016 and August 1, 2018, Griffon’s Board of Directors authorized the repurchase of up to $50,000 of Griffon’s outstanding common stock. Under this share repurchase program, the Company may purchase shares in the open market, including pursuant to a 10b5-1 plan, or in privately negotiated transactions. During the six months ended March 31, 2021, Griffon did not purchase any shares of common stock under these repurchase programs. As of March 31, 2021, an aggregate of $57,955 remains under Griffon's Board authorized repurchase programs.

During the second quarter ended March 31, 2021, no shares were withheld to settle employee taxes due upon the vesting of restricted stock. During the six months ended March 31, 2021, 133,027 shares, with a market value of $2,774, or $20.85 per share, respectively, were withheld to settle employee taxes due upon the vesting of restricted stock, and were added to treasury stock. Furthermore, during the six months ended March 31, 2021, an additional 6,507 shares, with a market value of $135, or

$20.75 per share, were withheld from common stock issued upon the vesting of restricted stock units to settle employee taxes due upon vesting.

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EARNINGS PER SHARE (EPS)

6 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

EARNINGS PER SHARE (EPS)

EARNINGS PER SHARE (EPS)

Basic EPS was calculated by dividing income available to common shareholders by the weighted average number of shares of common stock outstanding during the period. Diluted EPS was calculated by dividing income available to common shareholders by the weighted average number of shares of common stock outstanding plus additional common shares that could be issued in connection with stock based compensation.

The following table is a reconciliation of the share amounts (in thousands) used in computing earnings per share:

	Three Months Ended March 31,		Six Months Ended March 31,
	2021	2020	2021	2020
Common shares outstanding	56,684	47,431	56,684	47,431
Unallocated ESOP shares	(1,961)	(2,159)	(1,961)	(2,159)
Non-vested restricted stock	(3,822)	(3,562)	(3,822)	(3,562)
Impact of weighted average shares	(63)	(145)	(184)	(341)
Weighted average shares outstanding - basic	50,838	41,565	50,717	41,369
Incremental shares from stock based compensation	2,426	2,169	2,494	2,457
Weighted average shares outstanding - diluted	53,264	43,734	53,211	43,826

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BUSINESS SEGMENTS

6 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

BUSINESS SEGMENTS

BUSINESS SEGMENTS

Griffon reports its operations through three reportable segments, as follows:

•CPP conducts its operations through AMES. Founded in 1774, AMES is the leading North American manufacturer and a global provider of branded consumer and professional tools and products for home storage and organization, landscaping, and enhancing outdoor lifestyles. CPP sells products globally through a portfolio of leading brands including True Temper, AMES, and ClosetMaid.

•HBP conducts its operations through 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 CornellCookson brand.

•DE conducts its operations through Telephonics, founded in 1933, a globally recognized leading provider of highly sophisticated intelligence, surveillance and communications solutions for defense, aerospace and commercial customers.

Information on Griffon’s reportable segments is as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
REVENUE	2021		2020		2021		2020
Consumer and Professional Products	$	331,871	$	274,912	$	622,913	$	515,988
Home and Building Products	242,811		209,829		493,292		451,210
Defense Electronics	60,150		81,609		127,918		147,590
Total consolidated net sales	$	634,832	$	566,350	$	1,244,123	$	1,114,788

Disaggregation of Revenue

Revenue from contracts with customers is disaggregated by end markets, segments and geographic location, as it more accurately depicts the nature and amount of the Company’s revenue. The following table presents revenue disaggregated by end market and segment:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Residential repair and remodel	$	50,560	$	40,505	$	96,160	$	75,595
Retail	153,746		144,904		292,994		264,524
Residential new construction	14,540		14,884		28,055		29,857
Industrial	9,958		10,535		19,489		21,158
International excluding North America	103,067		64,084		186,215		124,854
Total Consumer and Professional Products	331,871		274,912		622,913		515,988
Residential repair and remodel	120,827		100,808		246,942		222,805
Commercial construction	94,751		86,300		190,690		178,187
Residential new construction	27,233		22,721		55,660		50,218
Total Home and Building Products	242,811		209,829		493,292		451,210
U.S. Government	35,045		53,623		82,369		96,324
International	21,497		25,021		38,392		43,554
Commercial	3,608		2,965		7,157		7,712
Total Defense Electronics	60,150		81,609		127,918		147,590
Total Consolidated Revenue	$	634,832	$	566,350	$	1,244,123	$	1,114,788

The following table presents revenue disaggregated by geography based on the location of the Company's customer:

	For the Three Months Ended March 31,
	2021								2020
	CPP		HBP		DE		Total		CPP		HBP		DE		Total
United States	$	205,368	$	230,955	$	34,166	$	470,489	$	191,412	$	199,060	$	55,071	$	445,543
Europe	38,965		41		5,791		44,797		24,737		5		9,880		34,622
Canada	21,778		9,797		1,925		33,500		17,515		7,867		4,209		29,591
Australia	63,691		—		122		63,813		39,032		—		189		39,221
All other countries	2,069		2,018		18,146		22,233		2,216		2,897		12,260		17,373
Consolidated revenue	$	331,871	$	242,811	$	60,150	$	634,832	$	274,912	$	209,829	$	81,609	$	566,350

	For the Six Months Ended March 31,
	2021								2020
	CPP		HBP		DE		Total		CPP		HBP		DE		Total
United States	$	388,810	$	467,486	$	81,544	$	937,840	$	351,570	$	426,010	$	101,214	$	878,794
Europe	52,121		41		12,696		64,858		31,342		28		15,865		47,235
Canada	43,893		21,285		3,754		68,932		35,296		19,120		6,783		61,199
Australia	133,231		—		441		133,672		93,260		—		795		94,055
All other countries	4,858		4,480		29,483		38,821		4,520		6,052		22,933		33,505
Consolidated revenue	$	622,913	$	493,292	$	127,918	$	1,244,123	$	515,988	$	451,210	$	147,590	$	1,114,788

Griffon evaluates performance and allocates resources based on each segment's operating results before interest income and expense, income taxes, depreciation and amortization, unallocated amounts (mainly corporate overhead), restructuring charges, loss from debt extinguishment and acquisition related expenses, as well as other items that may affect comparability, as applicable (“Segment adjusted EBITDA”). Griffon believes this information is useful to investors for the same reason. The following table provides a reconciliation of Segment adjusted EBITDA to Income before taxes:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Segment adjusted EBITDA:
Consumer and Professional Products	$	37,423	$	25,027	$	70,136	$	46,953
Home and Building Products	40,060		30,635		88,429		71,336
Defense Electronics	2,220		4,248		7,805		8,723
Segment adjusted EBITDA	79,703		59,910		166,370		127,012
Unallocated amounts, excluding depreciation *	(11,922)		(11,947)		(23,949)		(23,889)
Adjusted EBITDA	67,781		47,963		142,421		103,123
Net interest expense	(15,527)		(16,561)		(31,172)		(32,511)
Depreciation and amortization	(15,883)		(15,719)		(31,149)		(31,544)
Loss from debt extinguishment	—		(6,690)		—		(6,690)
Restructuring charges	(7,562)		(3,104)		(18,362)		(9,538)
Acquisition costs	—		(2,960)		—		(2,960)
Gain (adjustment) on sale of SEG business	(949)		—		5,291		—
Income before taxes	$	27,860	$	2,929	$	67,029	$	19,880

* Unallocated amounts typically include general corporate expenses not attributable to a reportable segment.

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
DEPRECIATION and AMORTIZATION	2021		2020		2021		2020
Segment:
Consumer and Professional Products	$	8,620	$	8,222	$	16,819	$	16,453
Home and Building Products	4,379		4,668		8,720		9,468
Defense Electronics	2,734		2,676		5,410		5,320
Total segment depreciation and amortization	15,733		15,566		30,949		31,241
Corporate	150		153		200		303
Total consolidated depreciation and amortization	$	15,883	$	15,719	$	31,149	$	31,544
CAPITAL EXPENDITURES
Segment:
Consumer and Professional Products	$	6,813	$	3,800	$	13,720	$	7,532
Home and Building Products	1,998		3,556		4,113		11,495
Defense Electronics	3,247		1,921		6,151		3,210
Total segment	12,058		9,277		23,984		22,237
Corporate	2		70		2		282
Total consolidated capital expenditures	$	12,060	$	9,347	$	23,986	$	22,519

ASSETS	At March 31, 2021		At September 30, 2020
Segment assets:
Consumer and Professional Products	$	1,408,545	$	1,255,127
Home and Building Products	604,325		606,785
Defense Electronics	288,019		329,128
Total segment assets	2,300,889		2,191,040
Corporate	216,571		248,902
Total continuing assets	2,517,460		2,439,942
Assets of discontinued operations	6,820		8,497
Consolidated total	$	2,524,280	$	2,448,439

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EMPLOYEE BENEFIT PLANS

6 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS

Defined benefit pension expense (income) included in Other Income (Expense), net was as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Interest cost	$	745	$	1,151	$	1,489	$	2,302
Expected return on plan assets	(2,545)		(2,586)		(5,089)		(5,172)
Amortization:
Prior service cost	—		4		—		8
Recognized actuarial loss	1,573		1,042		3,146		2,084
Net periodic expense (income)	$	(227)	$	(389)	$	(454)	$	(778)

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RECENT ACCOUNTING PRONOUNCEMENTS

6 Months Ended

Mar. 31, 2021

Accounting Changes and Error Corrections [Abstract]

RECENT ACCOUNTING PRONOUNCEMENTS

RECENT ACCOUNTING PRONOUNCEMENTS

Issued but not yet effective accounting pronouncements

In August 2018, the Financial Accounting Standards Board ("FASB") issued guidance to clarify disclosure requirements related to defined benefit pension and other post-retirement plans. The guidance is effective for fiscal years beginning after December 15, 2020, with early adoption permitted, and is effective for the Company in our fiscal year beginning in October 1, 2021. We are currently evaluating the effects that the adoption of this guidance will have on our the related pension disclosures.

In December 2019, the FASB issued guidance on simplifying the accounting for income taxes by clarifying and amending existing guidance related to the recognition of franchise tax, the evaluation of a step up in the tax basis of goodwill, and the effects of enacted changes in tax laws or rates in the effective tax rate computation, among other clarifications. Our effective date for adoption of this Accounting Standards Update ("ASU") is our fiscal year beginning October 1, 2021 with early adoption permitted. We are currently evaluating the effects that the adoption of this guidance will have on our consolidated financial statements and the related disclosures.

New Accounting Standards Implemented

In April 2019, the FASB issued guidance relating to accounting for credit losses on financial instruments, including trade receivables, and derivatives and hedging. This guidance is effective for the Company beginning in fiscal 2021. Adoption of this standard did not have a material impact on our consolidated financial statements and the related disclosures.

In August 2018, the FASB issued guidance which modifies the disclosures on fair value measurements by removing the requirement to disclose the amount and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy and the policy for timing of such transfers. This guidance expands the disclosure requirements for Level 3 fair value measurements,

primarily focused on changes in unrealized gains and losses included in other comprehensive income (loss). This guidance is effective for the Company beginning in fiscal 2021. Adoption of this standard did not have a material impact on our consolidated financial statements and the related disclosures.

In March 2020, the SEC adopted amendments to the financial disclosure requirements for guarantors and issuers of guaranteed securities registered or being registered in Rule 3-10 of Regulation S-X, and affiliates whose securities collateralize securities registered or being registered in Rule 3-16 of Regulation S-X (SEC Release No. 33-10762). The amendment replaces the requirement to present condensed consolidating financial statements, comprised of balance sheets and statements of operations, comprehensive income and cash flows for all periods presented, with summarized financial information of the guarantor only for the most recently completed fiscal year and any subsequent interim period. We adopted the amendments to the disclosure requirements during the first quarter of fiscal 2021. This amendment did not have an impact on our consolidated financial statements as this amendment simplifies the financial disclosures required in our guarantor and non-guarantor financial information. See Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations—Supplemental Guarantor Financial Information.

The Company has implemented all new accounting pronouncements that are in effect and that may impact its financial statements, and does not believe that there are any other new accounting pronouncements that have been issued that might have a material impact on its financial position or results of operations.

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DISCONTINUED OPERATIONS

6 Months Ended

Mar. 31, 2021

Discontinued Operations and Disposal Groups [Abstract]

DISCONTINUED OPERATIONS

DISCONTINUED OPERATIONS

The following amounts summarize the total assets and liabilities related to the Installation Services and other discontinued activities which have been segregated from Griffon’s continuing operations, and are reported as assets and liabilities of discontinued operations in the Condensed Consolidated Balance Sheets:

	At March 31, 2021		At September 30, 2020
Assets of discontinued operations:
Prepaid and other current assets	$	1,525	$	2,091
Other long-term assets	5,295		6,406
Total assets of discontinued operations	$	6,820	$	8,497
Liabilities of discontinued operations:
Accrued liabilities, current	$	4,600	$	3,797
Other long-term liabilities	6,415		7,014
Total liabilities of discontinued operations	$	11,015	$	10,811

At March 31, 2021, Griffon's assets and liabilities consist primarily of insurance claims, income tax, product liability, and warranty and environmental reserves.

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RESTRUCTURING CHARGES

6 Months Ended

Mar. 31, 2021

Restructuring and Related Activities [Abstract]

RESTRUCTURING CHARGES

RESTRUCTURING CHARGES

In November 2019, Griffon announced the development of a next-generation business platform for CPP to enhance the growth, efficiency, and competitiveness of its U.S. operations, and on November 12, 2020, Griffon announced that CPP is broadening this strategic initiative to include additional North American facilities, the AMES UK and Australia businesses, and a manufacturing facility in China.

The expanded focus of this initiative leverages the same three key development areas being executed within our U.S. operations. First, certain AMES global operations will be consolidated to optimize facilities footprint and talent. Second, strategic investments in automation and facilities expansion will be made to increase the efficiency of our manufacturing and fulfillment operations, and support e-commerce growth. Third, multiple independent information systems will be unified into a single data and analytics platform, which will serve the whole AMES global enterprise.

Expanding the roll-out of the new business platform from our AMES U.S. operations to include AMES’ global operations will extend the duration of the project by one year, with completion now expected by the end of calendar year 2023. When fully implemented, these actions will result in annual cash savings of $30,000 to $35,000 and a reduction in inventory of $30,000 to $35,000, both based on fiscal 2020 operating levels.

The cost to implement this new business platform, over the duration of the project, will include one-time charges of approximately $65,000 and capital investments of approximately $65,000. The one-time charges are comprised of $46,000 of cash charges, which includes $26,000 of personnel-related costs such as training, severance, and duplicate personnel costs as well as $20,000 of facility and lease exit costs. The remaining $19,000 of charges are non-cash and are primarily related to asset write-downs.

In the quarter and six months ended March 31, 2021, CPP incurred pre-tax restructuring and related exit costs approximating $7,502 and $10,581, respectively. During the six months ended March 31, 2021, cash charges totaled $7,891 and non-cash, asset-related charges totaled $2,690; the cash charges included $1,084 for one-time termination benefits and other personnel-related costs and $6,807 for facility and lease exit costs primarily driven by the consolidation of distribution facilities. Non-cash charges of $2,690 predominantly related to inventory that have no recoverable value. During the six months ended March 31, 2021, headcount was reduced by 65.

In the quarter and six months ended March 31, 2020, CPP incurred pre-tax restructuring and related exit costs approximating $3,104 and $9,538, respectively. During the six months ended March 31, 2020, cash charges totaled $4,846 and non-cash, asset-related charges totaled $4,692; the cash charges included $3,792 for one-time termination benefits and other personnel-related costs and $1,054 for facility exit costs. Non-cash charges included a $1,968 impairment charge related to a facility's operating lease as well as $671 of leasehold improvements made to the leased facility and $304 of inventory that have no recoverable value, and a $1,749 impairment charge related to machinery and equipment that have no recoverable value at one of the Company's owned manufacturing locations.

In September 2020, the DE Voluntary Employee Retirement Plan was initiated, which was subsequently followed by a reduction in force in November 2020, to improve efficiencies by combining functions and responsibilities. The combined actions resulted in severance charges of approximately $4,300, with $2,120 recognized in the fourth quarter of fiscal 2020, and the remaining $2,180 was recognized during the six months ended March 31, 2021. These actions reduced headcount by approximately 90 people.

In addition, charges of $5,601 were recorded during the quarter ended December 31, 2020, primarily related to exiting our older weather radar product lines.

A summary of the restructuring and other related charges included in Cost of goods and services and SG&A expenses in the Company's Condensed Consolidated Statements of Operations were as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Cost of goods and services	$	3,337	$	1,353	$	9,762	$	4,076
Selling, general and administrative expenses	4,225		1,751		8,600		5,462
Total restructuring charges	$	7,562	$	3,104	$	18,362	$	9,538

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Personnel related costs	$	782	$	1,658	$	3,264	$	3,792
Facilities, exit costs and other	4,283		914		6,807		1,054
Non-cash facility and other	2,497		532		8,291		4,692
Total	$	7,562	$	3,104	$	18,362	$	9,538

The following table summarizes the accrued liabilities of the Company's restructuring actions:

	Cash Charges				Non-Cash
	Personnel related costs		Facilities & Exit Costs		Facility and Other Costs		Total
Accrued liability at September 30, 2020	$	2,701	$	264	$	—	$	2,965
Q1 Restructuring charges	2,482		2,524		5,794		10,800
Q1 Cash payments	(1,598)		(2,534)		—		(4,132)
Q1 Non-cash charges	—		—		(5,794)		(5,794)
Accrued liability at December 31, 2020	$	3,585	$	254	$	—	$	3,839
Q2 Restructuring charges	782		4,283		2,497		7,562
Q2 Cash payments	(3,840)		(4,273)		—		(8,113)
Q2 Non-cash charges	—		—		(2,497)		(2,497)
Accrued liability at March 31, 2021	$	527	$	264	$	—	$	791

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OTHER INCOME (EXPENSE)

6 Months Ended

Mar. 31, 2021

Other Income and Expenses [Abstract]

OTHER INCOME (EXPENSE)

OTHER INCOME (EXPENSE)

For the quarters ended March 31, 2021 and 2020, Other income (expense) of $847 and $615, respectively, includes $320 and $745, respectively, of net currency exchange gains in connection with the translation of receivables and payables denominated in currencies other than the functional currencies of Griffon and its subsidiaries, net periodic benefit plan income of $227 and $389, respectively, as well as $55 and $(230), respectively, of net investment income (loss).

For the six months ended March 31, 2021 and 2020, Other income (expense) of $806 and 1,393 includes $(379) and $369, respectively, of net currency exchange gains (losses) in connection with the translation of receivables and payables denominated in currencies other than the functional currencies of Griffon and its subsidiaries, net periodic benefit plan income of $454 and $778, respectively, as well as $386 and $(149), respectively, of net investment income (loss). Additionally, Other income (expense) also includes a one-time technology recognition award for $700.

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WARRANTY LIABILITY

6 Months Ended

Mar. 31, 2021

Product Warranties Disclosures [Abstract]

WARRANTY LIABILITY

WARRANTY LIABILITY

DE offers warranties against product defects for periods generally ranging from one to two years, depending on the specific product and terms of the customer purchase agreement. CPP and HBP also offer warranties against product defects for periods generally ranging from one to ten years, with limited lifetime warranties on certain door models. Typical warranties require CPP, HBP and DE to repair or replace the defective products during the warranty period at no cost to the customer. At the time revenue is recognized, Griffon records a liability for warranty costs, estimated based on historical experience, and periodically assesses its warranty obligations and adjusts the liability as necessary. CPP offers an express limited warranty for a period of ninety days on all products from the date of original purchase unless otherwise stated on the product or packaging from the date of original purchase.

Changes in Griffon’s warranty liability, included in Accrued liabilities, were as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Balance, beginning of period	$	10,834	$	7,344	$	10,843	$	7,894
Warranties issued and changes in estimated pre-existing warranties	6,477		4,862		11,216		8,227
Actual warranty costs incurred	(4,633)		(4,417)		(9,381)		(8,332)
Balance, end of period	$	12,678	$	7,789	$	12,678	$	7,789

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OTHER COMPREHENSIVE INCOME (LOSS)

6 Months Ended

Mar. 31, 2021

OCI, Net of Tax [Abstract]

OTHER COMPREHENSIVE INCOME (LOSS)

OTHER COMPREHENSIVE INCOME (LOSS)

The amounts recognized in other comprehensive income (loss) were as follows:

	For the Three Months Ended March 31,
	2021						2020
	Pre-tax		Tax		Net of tax		Pre-tax		Tax		Net of tax
Foreign currency translation adjustments	$	1,739	$	—	$	1,739	$	(16,471)	$	—	$	(16,471)
Pension and other defined benefit plans	1,585		(340)		1,245		847		(178)		669
Cash flow hedges	2,559		(768)		1,791		1,383		(415)		968
Total other comprehensive income (loss)	$	5,883	$	(1,108)	$	4,775	$	(14,241)	$	(593)	$	(14,834)

	For the Six Months Ended March 31,
	2021						2020
	Pre-tax		Tax		Net of tax		Pre-tax		Tax		Net of tax
Foreign currency translation adjustments	$	13,862	$	—	$	13,862	$	(10,001)	$	—	$	(10,001)
Pension and other defined benefit plans	3,735		(784)		2,951		1,694		(353)		1,341
Cash flow hedges	1,576		(473)		1,103		953		(286)		667
Total other comprehensive income (loss)	$	19,173	$	(1,257)	$	17,916	$	(7,354)	$	(639)	$	(7,993)

The components of Accumulated other comprehensive income (loss) are as follows:

	At March 31, 2021		At September 30, 2020
Foreign currency translation adjustments	$	(11,821)	$	(25,683)
Pension and other defined benefit plans	(43,647)		(46,598)
Change in Cash flow hedges	1,292		189
	$	(54,176)	$	(72,092)

Amounts reclassified from accumulated other comprehensive income (loss) to income were as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
Gain (Loss)	2021		2020		2021		2020
Pension amortization	$	(1,573)	$	(1,046)	$	(3,146)	$	(2,092)
Cash flow hedges	(1,741)		1,050		(2,399)		994
Total gain (loss)	$	(3,314)	$	4	(5,545)		(1,098)
Tax benefit (expense)	696		(1)		1,165		231
Total	$	(2,618)	$	3	$	(4,380)	$	(867)

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LEASES

6 Months Ended

Mar. 31, 2021

Leases [Abstract]

LEASES

LEASES

The Company recognizes right-of-use ("ROU") assets and lease liabilities on the balance sheet, with the exception of leases with a term of twelve months or less. The Company determines if an arrangement is a lease at inception. The ROU assets and short and long-term liabilities associated with our Operating leases are shown as separate line items on our Condensed Consolidated Balance Sheets. Finance leases are included in property, plant, and equipment, net, other accrued liabilities, and other non-current liabilities. The Company's finance leases are immaterial. ROU assets, along with any other related long-lived assets, are periodically evaluated for impairment.

ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. We use the implicit rate when readily determinable. Our determination of the lease term may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option.

For operating leases, fixed lease payments are recognized as operating lease cost on a straight-line basis over the lease term. For finance leases and impaired operating leases, the ROU asset is depreciated on a straight-line basis over the remaining lease term, along with recognition of interest expense associated with accretion of the lease liability. For leases with a lease term of 12 months or less (a "Short-term" lease), any fixed lease payments are recognized on a straight-line basis over such term, and are not recognized on the Condensed Consolidated Balance Sheets. Variable lease cost for both operating and finance leases, if any, is recognized as incurred. The Company has lease agreements that contain both lease and non-lease components. For real estate leases, we account for lease components together with non-lease components (e.g., common-area maintenance). Components of operating lease costs are as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Fixed	$	9,970	$	9,187	$	20,010	$	18,739
Variable (a), (b)	2,087		1,823		4,134		3,576
Short-term (b)	1,053		1,393		2,167		2,823
Total	$	13,110	$	12,403	$	26,311	$	25,138

(a) Primarily relates to common-area maintenance and property taxes.

(b) Not recorded on the balance sheet.

Supplemental cash flow information were as follows:

	For the Six Months Ended March 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	22,099	$	21,582
Financing cash flows from finance leases	1,865		1,940
Total	$	23,964	$	23,522

Supplemental Condensed Consolidated Balance Sheet information related to leases were as follows:

	March 31, 2021		September 30, 2020
Operating Leases:
Right of use assets:
Operating right-of-use assets	$	154,929	$	161,627
Lease Liabilities:
Current portion of operating lease liabilities	$	30,685	$	31,848
Long-term operating lease liabilities	128,714		136,054
Total operating lease liabilities	$	159,399	$	167,902
Finance Leases:
Property, plant and equipment, net(1)	$	18,068	$	18,774
Lease Liabilities:
Notes payable and current portion of long-term debt	$	3,110	$	3,352
Long-term debt, net	14,950		15,339
Total financing lease liabilities	$	18,060	$	18,691

(1) Finance lease assets are recorded net of accumulated depreciation of $4,296 and $2,383 as of March 31, 2021 and September 30, 2020, respectively.

Two Griffon subsidiaries have finance leases outstanding for real estate located in Troy, Ohio and Ocala, Florida. The leases mature in 2021 and 2025, respectively, and bear interest at fixed rates of approximately 5.0% and 5.6%, respectively. The Troy, Ohio lease is secured by a mortgage on the real estate and is guaranteed by Griffon. The Ocala, Florida lease contains two five-year renewal options. As of March 31, 2021 and September 30, 2020, $15,907 and $17,188, respectively, was outstanding, net of issuance costs. The remaining lease liability balance relates to finance equipment leases.

The aggregate future maturities of lease payments for operating leases and finance leases as of March 31, 2021 are as follows (in thousands):

	Operating Leases		Finance Leases
2020(a)	$	19,128	$	2,381
2021	34,484		3,087
2022	26,884		2,749
2023	20,180		2,195
2024	18,214		2,077
2025	12,376		2,075
Thereafter	63,859		7,777
Total lease payments	195,125		22,341
Less: Imputed Interest	(35,726)		(4,281)
Present value of lease liabilities	$	159,399	$	18,060

(a) Excluding the six months ended March 31, 2021.

Average lease terms and discount rates at March 31, 2021 were as follows:

Weighted-average remaining lease term (years)
Operating leases	8.1
Finance Leases	8.2
Weighted-average discount rate
Operating Leases	4.45	%
Finance Leases	5.50	%

LEASES

LEASES

The Company recognizes right-of-use ("ROU") assets and lease liabilities on the balance sheet, with the exception of leases with a term of twelve months or less. The Company determines if an arrangement is a lease at inception. The ROU assets and short and long-term liabilities associated with our Operating leases are shown as separate line items on our Condensed Consolidated Balance Sheets. Finance leases are included in property, plant, and equipment, net, other accrued liabilities, and other non-current liabilities. The Company's finance leases are immaterial. ROU assets, along with any other related long-lived assets, are periodically evaluated for impairment.

ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. We use the implicit rate when readily determinable. Our determination of the lease term may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option.

For operating leases, fixed lease payments are recognized as operating lease cost on a straight-line basis over the lease term. For finance leases and impaired operating leases, the ROU asset is depreciated on a straight-line basis over the remaining lease term, along with recognition of interest expense associated with accretion of the lease liability. For leases with a lease term of 12 months or less (a "Short-term" lease), any fixed lease payments are recognized on a straight-line basis over such term, and are not recognized on the Condensed Consolidated Balance Sheets. Variable lease cost for both operating and finance leases, if any, is recognized as incurred. The Company has lease agreements that contain both lease and non-lease components. For real estate leases, we account for lease components together with non-lease components (e.g., common-area maintenance). Components of operating lease costs are as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Fixed	$	9,970	$	9,187	$	20,010	$	18,739
Variable (a), (b)	2,087		1,823		4,134		3,576
Short-term (b)	1,053		1,393		2,167		2,823
Total	$	13,110	$	12,403	$	26,311	$	25,138

(a) Primarily relates to common-area maintenance and property taxes.

(b) Not recorded on the balance sheet.

Supplemental cash flow information were as follows:

	For the Six Months Ended March 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	22,099	$	21,582
Financing cash flows from finance leases	1,865		1,940
Total	$	23,964	$	23,522

Supplemental Condensed Consolidated Balance Sheet information related to leases were as follows:

	March 31, 2021		September 30, 2020
Operating Leases:
Right of use assets:
Operating right-of-use assets	$	154,929	$	161,627
Lease Liabilities:
Current portion of operating lease liabilities	$	30,685	$	31,848
Long-term operating lease liabilities	128,714		136,054
Total operating lease liabilities	$	159,399	$	167,902
Finance Leases:
Property, plant and equipment, net(1)	$	18,068	$	18,774
Lease Liabilities:
Notes payable and current portion of long-term debt	$	3,110	$	3,352
Long-term debt, net	14,950		15,339
Total financing lease liabilities	$	18,060	$	18,691

(1) Finance lease assets are recorded net of accumulated depreciation of $4,296 and $2,383 as of March 31, 2021 and September 30, 2020, respectively.

Two Griffon subsidiaries have finance leases outstanding for real estate located in Troy, Ohio and Ocala, Florida. The leases mature in 2021 and 2025, respectively, and bear interest at fixed rates of approximately 5.0% and 5.6%, respectively. The Troy, Ohio lease is secured by a mortgage on the real estate and is guaranteed by Griffon. The Ocala, Florida lease contains two five-year renewal options. As of March 31, 2021 and September 30, 2020, $15,907 and $17,188, respectively, was outstanding, net of issuance costs. The remaining lease liability balance relates to finance equipment leases.

The aggregate future maturities of lease payments for operating leases and finance leases as of March 31, 2021 are as follows (in thousands):

	Operating Leases		Finance Leases
2020(a)	$	19,128	$	2,381
2021	34,484		3,087
2022	26,884		2,749
2023	20,180		2,195
2024	18,214		2,077
2025	12,376		2,075
Thereafter	63,859		7,777
Total lease payments	195,125		22,341
Less: Imputed Interest	(35,726)		(4,281)
Present value of lease liabilities	$	159,399	$	18,060

(a) Excluding the six months ended March 31, 2021.

Average lease terms and discount rates at March 31, 2021 were as follows:

Weighted-average remaining lease term (years)
Operating leases	8.1
Finance Leases	8.2
Weighted-average discount rate
Operating Leases	4.45	%
Finance Leases	5.50	%

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COMMITMENTS AND CONTINGENCIES

6 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Legal and environmental

Peekskill Site. Lightron Corporation (“Lightron”), a wholly-owned subsidiary of Griffon, once conducted operations at a location in the Town of Cortlandt, New York, just outside the city of Peekskill, New York (the “Peekskill Site”) owned by ISC Properties, Inc. (“ISCP”), a wholly-owned subsidiary of Griffon. ISCP sold the Peekskill Site in November 1982.

Subsequently, ISCP was advised by the Department of Environmental Conservation of New York State (the "DEC") that sampling at the Peekskill Site and in a creek near the Peekskill Site indicated concentrations of solvents and other chemicals common to prior plating operations by a Lightron subsidiary. In 1996, ISCP entered into a consent order with the DEC (the “Consent Order”), pursuant to which ISCP was required to perform a remedial investigation and prepare a feasibility study (the “Feasibility Study”). After completing the initial remedial investigation, ISCP conducted supplemental remedial investigations over the next several years, including soil vapor investigations, as required by the Consent Order.

In April 2009, the DEC advised ISCP that both the DEC and the New York State Department of Health had reviewed and accepted an August 2007 Remedial Investigation Report and an Additional Data Collection Summary Report dated January 30, 2009. ISCP submitted to the DEC a draft Feasibility Study which was accepted and approved by the DEC in February 2011. ISCP satisfied its obligations under the Consent Order when DEC approved the Remedial Investigation and Feasibility Study for the Peekskill Site. In June 2011 the DEC issued a Record of Decision that set forth a Remedial Action Plan for the Peekskill Site that identified the specific remedies selected and responded to public comments. The cost of the remedy proposed by DEC in its Remedial Action Plan was approximately $10,000.

Following issuance of the Remedial Action Plan, the DEC implemented a portion of its plan, and also performed additional investigation for the presence of metals in soils and sediments downstream from the Peekskill Site. During this investigation metals were found to be present in sediments further downstream from the Peekskill site than previously detected.

In August 2018, the DEC sent a letter to the United States Environmental Protection Agency (the “EPA”), in which the DEC requested that the Peekskill Site be nominated by the EPA for inclusion on the National Priorities List under CERCLA (the “NPL”). Based on the DEC’s request and an analysis by a consultant retained by the EPA, on May 15, 2019 the EPA added the Peekskill Site to the NPL and has since announced that it is performing a Remedial Investigation/Feasibility Study. On August 25, 2020, the EPA sent a letter to several parties, including Lightron and ISCP, requesting that each such party inform the EPA as to whether it would be willing to enter into discussions regarding implementation of a Remedial Investigation/Feasibility Study (“RI/FS”). The EPA also sent a request for information to each party under Section 104(e) of CERCLA. Lightron and ISCP have informed the EPA that they are willing to participate in discussions regarding implementation of the RI/FS. Lightron and ISCP have also submitted responses to certain items contained in the Section 104(e) information request, with additional responses to follow. The current owner of the property, which acquired the Peekskill Site from ISCP in 1982 and has no relationship with Lightron or ISCP, has also informed the EPA that it is willing to discuss implementation of the RI/FS, and has also received, and submitted certain information in response to, a Section 104(e) information request. The EPA may decide to implement the RI/FS, on its own or through the use of consultants, may reach agreement with one or more parties to perform the RI/FS, or may offer to negotiate with one or more parties to accept a settlement addressing the potential liability of such parties for investigation and/or remediation at the Peekskill Site. Should the EPA implement the RI/FS, or perform further studies and/or subsequently remediate the site, without first reaching agreement with one or more relevant parties, the EPA would likely seek reimbursement for the costs incurred from such parties.

Lightron has not engaged in any operations in over three decades. ISCP functioned solely as a real estate holding company, and has not held any real property in over three decades. Griffon does not acknowledge any responsibility to perform any investigation or remediation at the Peekskill Site.

Union Fork and Hoe, Frankfort, NY site. The former Union Fork and Hoe property in Frankfort, New York was acquired by AMES in 2006 as part of a larger acquisition, and has historic site contamination involving chlorinated solvents, petroleum hydrocarbons and metals. AMES entered into an Order on Consent with the New York State Department of Environmental Conservation (“DEC”). While the Order is without admission or finding of liability or acknowledgment that there has been a release of hazardous substances at the site, the Order required Ames to perform a remedial investigation of certain portions of the property and to recommend a remediation option. In 2011, remediation of chlorinated solvents in the groundwater was completed to the satisfaction of DEC. In 2018, Ames submitted a Feasibility Study recommending that the remaining soil contamination involving metals and petroleum be covered, excavated and removed to a licensed off-site location or placed under a cover on-site. DEC approved the selection of this remedy in 2019 by issuing a Record of Decision (“ROD”). In June 2020, Ames completed the remediation required by the ROD and filed a Construction Completion Report, a Site Management Plan and an environmental easement with DEC. While Ames was implementing the remediation required by the ROD, DEC requested additional investigation of a small area on the site and of an area adjacent to the site perimeter. Ames investigated the on-site area and has completed remediation of that small area under a workplan approved by DEC. At the request of DEC, Ames has also submitted a workplan to investigate the areas adjacent to the site perimeter. AMES has a number of defenses to liability in this matter, including its rights under a previous Consent Judgment entered into between DEC and a predecessor of AMES relating to the site. Ames’ insurer has accepted Ames’ claim for a substantial portion of the costs incurred and to be incurred for both the on-site and off-site activities.

U.S. Government investigations and claims

Defense contracts and subcontracts, including Griffon’s contracts and subcontracts, are subject to audit and review by various agencies and instrumentalities of the United States government, including among others, the Defense Contract Audit Agency, the Defense Criminal Investigative Service, and the Department of Justice which has responsibility for asserting claims on behalf of the U.S. Government.

In general, departments and agencies of the U.S. Government have the authority to investigate various transactions and operations of Griffon, and the results of such investigations may lead to administrative, civil or criminal proceedings, the ultimate outcome of which could be fines, penalties, repayments or compensatory or treble damages. U.S. Government regulations provide that certain findings against a contractor may lead to suspension or debarment from future U.S. Government contracts or the loss of export privileges for a company or an operating division or subdivision. Suspension or debarment could have a material adverse effect on Telephonics because of its reliance on government contracts.

General legal

Griffon is subject to various laws and regulations relating to the protection of the environment and is a party to legal proceedings arising in the ordinary course of business. Management believes, based on facts presently known to it, that the resolution of the matters above and such other matters will not have a material adverse effect on Griffon’s consolidated financial position, results of operations or cash flows.

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Policies)

6 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

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 year ended September 30, 2020, 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 CPP operations 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, 2020 was derived from the audited financial statements included in Griffon’s Annual Report on Form 10-K for the year ended September 30, 2020.

The condensed consolidated financial statements include the accounts of Griffon and all subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

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. Significant estimates include allowances for doubtful accounts receivable and returns, net realizable value of inventories, restructuring reserves, valuation of goodwill and intangible assets, sales, profits and loss recognition for performance obligations satisfied over time, 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, assumption 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, assumptions associated with valuation of acquired assets and assumed liabilities of acquired companies 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.

Certain amounts in the prior year have been reclassified to conform to current year presentation.

Fair Value Measurements

The carrying values of cash and equivalents, accounts receivable, accounts and notes payable, and revolving credit and variable interest rate debt approximate fair value due to either the short-term nature of such instruments or the fact that the interest rate of the revolving credit and variable rate debt is based upon current market rates.

Applicable accounting guidance establishes a fair value hierarchy requiring the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the hierarchy is based on the lowest level of input that is significant to the fair value measurement. The accounting guidance establishes three levels of inputs that may be used to measure fair value, as follows:

•Level 1 inputs are measured and recorded at fair value based upon quoted prices in active markets for identical assets.

•Level 2 inputs include inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities.

•Level 3 inputs are unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

Inventories

Inventories are stated at the lower of cost (first-in, first-out or average cost) or market.

Issued but not yet effective accounting pronouncements and New Accounting Standards Implemented

Issued but not yet effective accounting pronouncements

In August 2018, the Financial Accounting Standards Board ("FASB") issued guidance to clarify disclosure requirements related to defined benefit pension and other post-retirement plans. The guidance is effective for fiscal years beginning after December 15, 2020, with early adoption permitted, and is effective for the Company in our fiscal year beginning in October 1, 2021. We are currently evaluating the effects that the adoption of this guidance will have on our the related pension disclosures.

In December 2019, the FASB issued guidance on simplifying the accounting for income taxes by clarifying and amending existing guidance related to the recognition of franchise tax, the evaluation of a step up in the tax basis of goodwill, and the effects of enacted changes in tax laws or rates in the effective tax rate computation, among other clarifications. Our effective date for adoption of this Accounting Standards Update ("ASU") is our fiscal year beginning October 1, 2021 with early adoption permitted. We are currently evaluating the effects that the adoption of this guidance will have on our consolidated financial statements and the related disclosures.

New Accounting Standards Implemented

In April 2019, the FASB issued guidance relating to accounting for credit losses on financial instruments, including trade receivables, and derivatives and hedging. This guidance is effective for the Company beginning in fiscal 2021. Adoption of this standard did not have a material impact on our consolidated financial statements and the related disclosures.

In August 2018, the FASB issued guidance which modifies the disclosures on fair value measurements by removing the requirement to disclose the amount and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy and the policy for timing of such transfers. This guidance expands the disclosure requirements for Level 3 fair value measurements,

primarily focused on changes in unrealized gains and losses included in other comprehensive income (loss). This guidance is effective for the Company beginning in fiscal 2021. Adoption of this standard did not have a material impact on our consolidated financial statements and the related disclosures.

In March 2020, the SEC adopted amendments to the financial disclosure requirements for guarantors and issuers of guaranteed securities registered or being registered in Rule 3-10 of Regulation S-X, and affiliates whose securities collateralize securities registered or being registered in Rule 3-16 of Regulation S-X (SEC Release No. 33-10762). The amendment replaces the requirement to present condensed consolidating financial statements, comprised of balance sheets and statements of operations, comprehensive income and cash flows for all periods presented, with summarized financial information of the guarantor only for the most recently completed fiscal year and any subsequent interim period. We adopted the amendments to the disclosure requirements during the first quarter of fiscal 2021. This amendment did not have an impact on our consolidated financial statements as this amendment simplifies the financial disclosures required in our guarantor and non-guarantor financial information. See Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations—Supplemental Guarantor Financial Information.

The Company has implemented all new accounting pronouncements that are in effect and that may impact its financial statements, and does not believe that there are any other new accounting pronouncements that have been issued that might have a material impact on its financial position or results of operations.

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INVENTORIES (Tables)

6 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Schedule of Inventory

The following table details the components of inventory:

	At March 31, 2021		At September 30, 2020
Raw materials and supplies	$	155,720	$	146,351
Work in process	86,299		83,697
Finished goods	242,734		183,777
Total	$	484,753	$	413,825

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PROPERTY, PLANT AND EQUIPMENT (Tables)

6 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

The following table details the components of property, plant and equipment, net:

	At March 31, 2021		At September 30, 2020
Land, building and building improvements	$	169,081	$	167,005
Machinery and equipment	611,187		595,126
Leasehold improvements	53,952		53,386
	834,220		815,517
Accumulated depreciation and amortization	(493,215)		(471,553)
Total	$	341,005	$	343,964

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CREDIT LOSSES (Tables)

6 Months Ended

Mar. 31, 2021

Credit Loss [Abstract]

Schedule of Accounts Receivable, Allowance for Credit Losses

The following table provides a roll-forward of the allowance for credit losses that is deducted from the amortized cost basis of accounts receivable to present the net amount expected to be collected:

Beginning Balance, October 1, 2020	$	8,505
Provision for expected credit losses	1,228
Amounts written off charged against the allowance	(161)
Other, primarily foreign currency translation	22
Ending Balance, March 31, 2021	$	9,594

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GOODWILL AND OTHER INTANGIBLES (Tables)

6 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes in Carrying Value of Goodwill

The following table provides changes in the carrying value of goodwill by segment during the six months ended March 31, 2021:

	At September 30, 2020		Business Acquisitions (a)		Business Divestitures (b)		Foreign  currency translations adjustments		At March 31, 2021
Consumer and Professional Products	$	232,845	$	1,246	$	—	$	3,287	$	237,378
Home and Building Products	191,253		—		—		—		191,253
Defense Electronics	18,545		—		(811)		—		17,734
Total	$	442,643	$	1,246	$	(811)	$	3,287	$	446,365

(a) The increase in the CPP segment was due to the acquisition of Quatro.

(b) The decrease in the DE segment was due to the divestiture of SEG.

Summary of Gross Carrying Value and Accumulated Amortization of Intangible Assets

The following table provides the gross carrying value and accumulated amortization for each major class of intangible assets:

	At March 31, 2021					At September 30, 2020
	Gross Carrying Amount		Accumulated Amortization		Average Life (Years)	Gross Carrying Amount		Accumulated Amortization
Customer relationships & other	$	189,189	$	71,840	23	$	185,940	$	66,656
Technology and patents	19,529		8,030		13	19,464		8,360
Total amortizable intangible assets	208,718		79,870			205,404		75,016
Trademarks	228,658		—			224,640		—
Total intangible assets	$	437,376	$	79,870		$	430,044	$	75,016

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LONG-TERM DEBT (Tables)

6 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Summary of Long-Term Debt

		At March 31, 2021										At September 30, 2020
		Outstanding Balance		Original Issuer Premium		Capitalized Fees & Expenses		Balance Sheet		Coupon Interest Rate		Outstanding Balance		Original Issuer Premium		Capitalized Fees & Expenses		Balance Sheet		Coupon Interest Rate
Senior notes due 2028	(a)	$	1,000,000	$	339	(14,329)		$	986,010	5.75	%	$	1,000,000	$	363	$	(15,376)	$	984,987	5.75	%
Revolver due 2025	(b)	20,622		—		(1,963)		18,659		Variable		12,858		—		(2,209)		10,649		Variable
Finance lease - real estate	(c)	15,924		—		(17)		15,907		5.60	%	17,218		—		(30)		17,188		5.60	%
Non US lines of credit	(d)	4,405		—		(24)		4,381		Variable		—		—		(30)		(30)		Variable
Non US term loans	(d)	29,870		—		(133)		29,737		Variable		31,086		—		(160)		30,926		Variable
Other long term debt	(e)	4,094		—		(16)		4,078		Variable		3,260		—		(16)		3,244		Variable
Totals		1,074,915		339		(16,482)		1,058,772				1,064,422		363		(17,821)		1,046,964
less: Current portion		(14,913)		—		—		(14,913)				(9,922)		—		—		(9,922)
Long-term debt		$	1,060,002	$	339	$	(16,482)	$	1,043,859			$	1,054,500	$	363	$	(17,821)	$	1,037,042

Summary of Interest Expense Incurred

		Three Months Ended March 31, 2021										Three Months Ended March 31, 2020
		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense
Senior notes due 2028	(a)	6.0	%	$	14,375	$	12	$	505	$	14,892	6.0	%	$	5,566	$	—	$	135	$	5,701
Senior notes due 2022	(a)	—		—		—		—		—		5.7	%	8,040		45		628		8,713
Revolver due 2025	(b)	Variable		287		—		122		409		Variable		1,819		—		165		1,984
Finance lease - real estate	(c)	5.9	%	224		—		7		231		6.1	%	52		—		7		59
Non US lines of credit	(d)	Variable		4		—		4		8		Variable		3		—		8		11
Non US term loans	(d)	Variable		163		—		18		181		Variable		292		—		7		299
Other long term debt	(e)	Variable		115		—		1		116		Variable		132		—		—		132
Capitalized interest				(6)		—		—		(6)				(28)		—		—		(28)
Totals				$	15,162	$	12	$	657	$	15,831			$	15,876	$	45	$	950	$	16,871

		Six Months Ended March 31, 2021										Six Months Ended March 31, 2020
		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense		Effective Interest Rate		Cash Interest		Amort. Debt Premium		Amort. Debt Issuance Costs & Other Fees		Total Interest Expense
Senior notes due 2028	(a)	6.0	%	$	28,750	$	24	$	1,023	$	29,797	6.0	%	$	5,566	$	—	$	135	$	5,701
Senior notes due 2022	(a)	—		—		—		—		—		5.7	%	21,165		112		1,579		22,856
Revolver due 2025	(b)	Variable		416		—		245		661		Variable		3,201		—		397		3,598
Finance lease - real estate	(c)	5.6	%	456		—		13		469		6.0	%	113		—		13		126
Non US lines of credit	(d)	Variable		7		—		8		15		Variable		7		—		12		19
Non US term loans	(d)	Variable		334		—		35		369		Variable		564		—		19		583
Other long term debt	(e)	Variable		222		—		1		223		Variable		292		—		—		292
Capitalized interest				(13)		—		—		(13)				(93)		—		—		(93)
Totals				$	30,172	$	24	$	1,325	$	31,521			$	30,815	$	112	$	2,155	$	33,082

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SHAREHOLDERS' EQUITY SHAREHOLDERS' EQUITY (Tables)

6 Months Ended

Mar. 31, 2021

Stockholders' Equity Note [Abstract]

Compensation Expense Relating to Stock-based Incentive Plans

The following table summarizes the Company’s compensation expense relating to all stock-based incentive plans:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Restricted stock	$	4,349	$	3,662	$	7,777	$	6,812
ESOP	944		658		1,724		1,490
Total stock based compensation	$	5,293	$	4,320	$	9,501	$	8,302

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EARNINGS PER SHARE (EPS) (Tables)

6 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Summary of Reconciliation of Share Amounts Used in Earnings Per Share

The following table is a reconciliation of the share amounts (in thousands) used in computing earnings per share:

	Three Months Ended March 31,		Six Months Ended March 31,
	2021	2020	2021	2020
Common shares outstanding	56,684	47,431	56,684	47,431
Unallocated ESOP shares	(1,961)	(2,159)	(1,961)	(2,159)
Non-vested restricted stock	(3,822)	(3,562)	(3,822)	(3,562)
Impact of weighted average shares	(63)	(145)	(184)	(341)
Weighted average shares outstanding - basic	50,838	41,565	50,717	41,369
Incremental shares from stock based compensation	2,426	2,169	2,494	2,457
Weighted average shares outstanding - diluted	53,264	43,734	53,211	43,826

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BUSINESS SEGMENTS (Tables)

6 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Summary of Reportable Segments from Continuing Operations

Information on Griffon’s reportable segments is as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
REVENUE	2021		2020		2021		2020
Consumer and Professional Products	$	331,871	$	274,912	$	622,913	$	515,988
Home and Building Products	242,811		209,829		493,292		451,210
Defense Electronics	60,150		81,609		127,918		147,590
Total consolidated net sales	$	634,832	$	566,350	$	1,244,123	$	1,114,788

The following table provides a reconciliation of Segment adjusted EBITDA to Income before taxes:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Segment adjusted EBITDA:
Consumer and Professional Products	$	37,423	$	25,027	$	70,136	$	46,953
Home and Building Products	40,060		30,635		88,429		71,336
Defense Electronics	2,220		4,248		7,805		8,723
Segment adjusted EBITDA	79,703		59,910		166,370		127,012
Unallocated amounts, excluding depreciation *	(11,922)		(11,947)		(23,949)		(23,889)
Adjusted EBITDA	67,781		47,963		142,421		103,123
Net interest expense	(15,527)		(16,561)		(31,172)		(32,511)
Depreciation and amortization	(15,883)		(15,719)		(31,149)		(31,544)
Loss from debt extinguishment	—		(6,690)		—		(6,690)
Restructuring charges	(7,562)		(3,104)		(18,362)		(9,538)
Acquisition costs	—		(2,960)		—		(2,960)
Gain (adjustment) on sale of SEG business	(949)		—		5,291		—
Income before taxes	$	27,860	$	2,929	$	67,029	$	19,880

* Unallocated amounts typically include general corporate expenses not attributable to a reportable segment.

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
DEPRECIATION and AMORTIZATION	2021		2020		2021		2020
Segment:
Consumer and Professional Products	$	8,620	$	8,222	$	16,819	$	16,453
Home and Building Products	4,379		4,668		8,720		9,468
Defense Electronics	2,734		2,676		5,410		5,320
Total segment depreciation and amortization	15,733		15,566		30,949		31,241
Corporate	150		153		200		303
Total consolidated depreciation and amortization	$	15,883	$	15,719	$	31,149	$	31,544
CAPITAL EXPENDITURES
Segment:
Consumer and Professional Products	$	6,813	$	3,800	$	13,720	$	7,532
Home and Building Products	1,998		3,556		4,113		11,495
Defense Electronics	3,247		1,921		6,151		3,210
Total segment	12,058		9,277		23,984		22,237
Corporate	2		70		2		282
Total consolidated capital expenditures	$	12,060	$	9,347	$	23,986	$	22,519

ASSETS	At March 31, 2021		At September 30, 2020
Segment assets:
Consumer and Professional Products	$	1,408,545	$	1,255,127
Home and Building Products	604,325		606,785
Defense Electronics	288,019		329,128
Total segment assets	2,300,889		2,191,040
Corporate	216,571		248,902
Total continuing assets	2,517,460		2,439,942
Assets of discontinued operations	6,820		8,497
Consolidated total	$	2,524,280	$	2,448,439

Summary of Disaggregation of Revenue by End Market and Segment

The following table presents revenue disaggregated by end market and segment:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Residential repair and remodel	$	50,560	$	40,505	$	96,160	$	75,595
Retail	153,746		144,904		292,994		264,524
Residential new construction	14,540		14,884		28,055		29,857
Industrial	9,958		10,535		19,489		21,158
International excluding North America	103,067		64,084		186,215		124,854
Total Consumer and Professional Products	331,871		274,912		622,913		515,988
Residential repair and remodel	120,827		100,808		246,942		222,805
Commercial construction	94,751		86,300		190,690		178,187
Residential new construction	27,233		22,721		55,660		50,218
Total Home and Building Products	242,811		209,829		493,292		451,210
U.S. Government	35,045		53,623		82,369		96,324
International	21,497		25,021		38,392		43,554
Commercial	3,608		2,965		7,157		7,712
Total Defense Electronics	60,150		81,609		127,918		147,590
Total Consolidated Revenue	$	634,832	$	566,350	$	1,244,123	$	1,114,788

The following table presents revenue disaggregated by geography based on the location of the Company's customer:

	For the Three Months Ended March 31,
	2021								2020
	CPP		HBP		DE		Total		CPP		HBP		DE		Total
United States	$	205,368	$	230,955	$	34,166	$	470,489	$	191,412	$	199,060	$	55,071	$	445,543
Europe	38,965		41		5,791		44,797		24,737		5		9,880		34,622
Canada	21,778		9,797		1,925		33,500		17,515		7,867		4,209		29,591
Australia	63,691		—		122		63,813		39,032		—		189		39,221
All other countries	2,069		2,018		18,146		22,233		2,216		2,897		12,260		17,373
Consolidated revenue	$	331,871	$	242,811	$	60,150	$	634,832	$	274,912	$	209,829	$	81,609	$	566,350

	For the Six Months Ended March 31,
	2021								2020
	CPP		HBP		DE		Total		CPP		HBP		DE		Total
United States	$	388,810	$	467,486	$	81,544	$	937,840	$	351,570	$	426,010	$	101,214	$	878,794
Europe	52,121		41		12,696		64,858		31,342		28		15,865		47,235
Canada	43,893		21,285		3,754		68,932		35,296		19,120		6,783		61,199
Australia	133,231		—		441		133,672		93,260		—		795		94,055
All other countries	4,858		4,480		29,483		38,821		4,520		6,052		22,933		33,505
Consolidated revenue	$	622,913	$	493,292	$	127,918	$	1,244,123	$	515,988	$	451,210	$	147,590	$	1,114,788

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EMPLOYEE BENEFIT PLANS (Tables)

6 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

Summary of Defined Benefit Plans Included in Other Income

Defined benefit pension expense (income) included in Other Income (Expense), net was as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Interest cost	$	745	$	1,151	$	1,489	$	2,302
Expected return on plan assets	(2,545)		(2,586)		(5,089)		(5,172)
Amortization:
Prior service cost	—		4		—		8
Recognized actuarial loss	1,573		1,042		3,146		2,084
Net periodic expense (income)	$	(227)	$	(389)	$	(454)	$	(778)

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DISCONTINUED OPERATIONS (Tables)

6 Months Ended

Mar. 31, 2021

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures

The following amounts summarize the total assets and liabilities related to the Installation Services and other discontinued activities which have been segregated from Griffon’s continuing operations, and are reported as assets and liabilities of discontinued operations in the Condensed Consolidated Balance Sheets:

	At March 31, 2021		At September 30, 2020
Assets of discontinued operations:
Prepaid and other current assets	$	1,525	$	2,091
Other long-term assets	5,295		6,406
Total assets of discontinued operations	$	6,820	$	8,497
Liabilities of discontinued operations:
Accrued liabilities, current	$	4,600	$	3,797
Other long-term liabilities	6,415		7,014
Total liabilities of discontinued operations	$	11,015	$	10,811

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RESTRUCTURING CHARGES RESTRUCTURING CHARGES (Tables)

6 Months Ended

Mar. 31, 2021

Restructuring and Related Activities [Abstract]

Summary of the Restructuring and Other Related Charges

A summary of the restructuring and other related charges included in Cost of goods and services and SG&A expenses in the Company's Condensed Consolidated Statements of Operations were as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Cost of goods and services	$	3,337	$	1,353	$	9,762	$	4,076
Selling, general and administrative expenses	4,225		1,751		8,600		5,462
Total restructuring charges	$	7,562	$	3,104	$	18,362	$	9,538

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Personnel related costs	$	782	$	1,658	$	3,264	$	3,792
Facilities, exit costs and other	4,283		914		6,807		1,054
Non-cash facility and other	2,497		532		8,291		4,692
Total	$	7,562	$	3,104	$	18,362	$	9,538

Summary of Accrued Liability for the Restructuring and Related Charges

The following table summarizes the accrued liabilities of the Company's restructuring actions:

	Cash Charges				Non-Cash
	Personnel related costs		Facilities & Exit Costs		Facility and Other Costs		Total
Accrued liability at September 30, 2020	$	2,701	$	264	$	—	$	2,965
Q1 Restructuring charges	2,482		2,524		5,794		10,800
Q1 Cash payments	(1,598)		(2,534)		—		(4,132)
Q1 Non-cash charges	—		—		(5,794)		(5,794)
Accrued liability at December 31, 2020	$	3,585	$	254	$	—	$	3,839
Q2 Restructuring charges	782		4,283		2,497		7,562
Q2 Cash payments	(3,840)		(4,273)		—		(8,113)
Q2 Non-cash charges	—		—		(2,497)		(2,497)
Accrued liability at March 31, 2021	$	527	$	264	$	—	$	791

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WARRANTY LIABILITY (Tables)

6 Months Ended

Mar. 31, 2021

Product Warranties Disclosures [Abstract]

Summary of Changes in Warranty Liability, Included in Accrued Liabilities

Changes in Griffon’s warranty liability, included in Accrued liabilities, were as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Balance, beginning of period	$	10,834	$	7,344	$	10,843	$	7,894
Warranties issued and changes in estimated pre-existing warranties	6,477		4,862		11,216		8,227
Actual warranty costs incurred	(4,633)		(4,417)		(9,381)		(8,332)
Balance, end of period	$	12,678	$	7,789	$	12,678	$	7,789

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OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

6 Months Ended

Mar. 31, 2021

OCI, Net of Tax [Abstract]

Summary of Comprehensive Income (Loss)

The amounts recognized in other comprehensive income (loss) were as follows:

	For the Three Months Ended March 31,
	2021						2020
	Pre-tax		Tax		Net of tax		Pre-tax		Tax		Net of tax
Foreign currency translation adjustments	$	1,739	$	—	$	1,739	$	(16,471)	$	—	$	(16,471)
Pension and other defined benefit plans	1,585		(340)		1,245		847		(178)		669
Cash flow hedges	2,559		(768)		1,791		1,383		(415)		968
Total other comprehensive income (loss)	$	5,883	$	(1,108)	$	4,775	$	(14,241)	$	(593)	$	(14,834)

	For the Six Months Ended March 31,
	2021						2020
	Pre-tax		Tax		Net of tax		Pre-tax		Tax		Net of tax
Foreign currency translation adjustments	$	13,862	$	—	$	13,862	$	(10,001)	$	—	$	(10,001)
Pension and other defined benefit plans	3,735		(784)		2,951		1,694		(353)		1,341
Cash flow hedges	1,576		(473)		1,103		953		(286)		667
Total other comprehensive income (loss)	$	19,173	$	(1,257)	$	17,916	$	(7,354)	$	(639)	$	(7,993)

The components of Accumulated other comprehensive income (loss) are as follows:

	At March 31, 2021		At September 30, 2020
Foreign currency translation adjustments	$	(11,821)	$	(25,683)
Pension and other defined benefit plans	(43,647)		(46,598)
Change in Cash flow hedges	1,292		189
	$	(54,176)	$	(72,092)

Reclassification from Accumulated Other Comprehensive Income (Loss)

Amounts reclassified from accumulated other comprehensive income (loss) to income were as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
Gain (Loss)	2021		2020		2021		2020
Pension amortization	$	(1,573)	$	(1,046)	$	(3,146)	$	(2,092)
Cash flow hedges	(1,741)		1,050		(2,399)		994
Total gain (loss)	$	(3,314)	$	4	(5,545)		(1,098)
Tax benefit (expense)	696		(1)		1,165		231
Total	$	(2,618)	$	3	$	(4,380)	$	(867)

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LEASES (Tables)

6 Months Ended

Mar. 31, 2021

Leases [Abstract]

Components of Operating Lease Cost, Cash Flow Information, and Average Lease Terms and Discount Rates

Components of operating lease costs are as follows:

	For the Three Months Ended March 31,				For the Six Months Ended March 31,
	2021		2020		2021		2020
Fixed	$	9,970	$	9,187	$	20,010	$	18,739
Variable (a), (b)	2,087		1,823		4,134		3,576
Short-term (b)	1,053		1,393		2,167		2,823
Total	$	13,110	$	12,403	$	26,311	$	25,138

(a) Primarily relates to common-area maintenance and property taxes.

(b) Not recorded on the balance sheet.

Supplemental cash flow information were as follows:

	For the Six Months Ended March 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	22,099	$	21,582
Financing cash flows from finance leases	1,865		1,940
Total	$	23,964	$	23,522

Average lease terms and discount rates at March 31, 2021 were as follows:

Weighted-average remaining lease term (years)
Operating leases	8.1
Finance Leases	8.2
Weighted-average discount rate
Operating Leases	4.45	%
Finance Leases	5.50	%

Supplemental Condensed Consolidated Balance Sheet Information

Supplemental Condensed Consolidated Balance Sheet information related to leases were as follows:

	March 31, 2021		September 30, 2020
Operating Leases:
Right of use assets:
Operating right-of-use assets	$	154,929	$	161,627
Lease Liabilities:
Current portion of operating lease liabilities	$	30,685	$	31,848
Long-term operating lease liabilities	128,714		136,054
Total operating lease liabilities	$	159,399	$	167,902
Finance Leases:
Property, plant and equipment, net(1)	$	18,068	$	18,774
Lease Liabilities:
Notes payable and current portion of long-term debt	$	3,110	$	3,352
Long-term debt, net	14,950		15,339
Total financing lease liabilities	$	18,060	$	18,691

(1) Finance lease assets are recorded net of accumulated depreciation of $4,296 and $2,383 as of March 31, 2021 and September 30, 2020, respectively.

Aggregate Future Maturities of Lease Payments for Operating Leases

The aggregate future maturities of lease payments for operating leases and finance leases as of March 31, 2021 are as follows (in thousands):

	Operating Leases		Finance Leases
2020(a)	$	19,128	$	2,381
2021	34,484		3,087
2022	26,884		2,749
2023	20,180		2,195
2024	18,214		2,077
2025	12,376		2,075
Thereafter	63,859		7,777
Total lease payments	195,125		22,341
Less: Imputed Interest	(35,726)		(4,281)
Present value of lease liabilities	$	159,399	$	18,060

(a) Excluding the six months ended March 31, 2021.

Aggregate Future Maturities of Lease Payments for Finance Leases

The aggregate future maturities of lease payments for operating leases and finance leases as of March 31, 2021 are as follows (in thousands):

	Operating Leases		Finance Leases
2020(a)	$	19,128	$	2,381
2021	34,484		3,087
2022	26,884		2,749
2023	20,180		2,195
2024	18,214		2,077
2025	12,376		2,075
Thereafter	63,859		7,777
Total lease payments	195,125		22,341
Less: Imputed Interest	(35,726)		(4,281)
Present value of lease liabilities	$	159,399	$	18,060

(a) Excluding the six months ended March 31, 2021.

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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details)	6 Months Ended
	Mar. 31, 2021 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	3

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FAIR VALUE MEASUREMENTS (Details) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2021 USD ($) $ / shares
Designated as Hedging Instrument | Australian Dollar Forward Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount	$ 61,000	$ 61,000
Contracts weighted average rate price (in dollars per share) | $ / shares		$ 1.29
Deferred gain (loss) from currency translation included in AOCI	(831)	$ (831)
Deferred gain (loss) from currency translation included in AOCI, net of tax	(582)	(582)
Designated as Hedging Instrument | Australian Dollar Forward Contracts | Cost of goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) reclassified for settled contracts	(1,741)	$ (2,399)
Designated as Hedging Instrument | Australian Dollar Forward Contracts | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		30 days
Designated as Hedging Instrument | Australian Dollar Forward Contracts | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		180 days
Not Designated as Hedging Instrument | Canadian Dollar Forward Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount	$ 7,935	$ 7,935
Derivative, average forward exchange rate	1.30	1.30
Not Designated as Hedging Instrument | Canadian Dollar Forward Contracts | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		29 days
Not Designated as Hedging Instrument | Canadian Dollar Forward Contracts | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		450 days
Not Designated as Hedging Instrument | British Pound Forward Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount	$ 5,200	$ 5,200
Derivative, average forward exchange rate	0.75	0.75
Not Designated as Hedging Instrument | British Pound Forward Contracts | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		6 days
Not Designated as Hedging Instrument | British Pound Forward Contracts | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		104 days
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Insurance contracts fair value	$ 3,821	$ 3,821
Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument | Canadian Dollar Forward Contracts | Other income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	(520)	244
Realized gains (losses)	(102)	(161)
Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument | British Pound Forward Contracts | Other income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	386	141
Realized gains (losses)	(211)	(281)
Fair Value, Inputs, Level 2 | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,088	2,088
Fair Value, Inputs, Level 2 | Portion at Other than Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,000	1,000
Senior notes due 2028 | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior note, fair value disclosure	$ 1,060,000	$ 1,060,000

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REVENUE - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020
Concentration Risk [Line Items]
Net favorable (unfavorable) catch-up adjustments to income from operations	$ 1,423	$ 2,188	$ 3,220	$ 422
Accumulated estimated costs to complete loss contracts	$ 8,500		$ 8,500		$ 10,800
Customer Concentration Risk | CPP and HBP
Concentration Risk [Line Items]
Percentage of performance obligations recognized at a point in time			86.00%
Revenue from Contract with Customer Benchmark | Government Contracts Concentration Risk | Transferred over Time
Concentration Risk [Line Items]
Concentration risk (in percentage)			14.00%

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REVENUE - Transaction Price Allocated to the Remaining Performance Obligations (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligations (backlog)	$ 353,870
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations (backlog), percentage to be satisfied within one year	65.00%
Remaining performance obligations (backlog), expected timing of satisfaction, period	12 months

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REVENUE - Contract Balances (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Contract costs and recognized income not yet billed, net of progress payments	$ 75,000	$ 84,426
Increase (decrease) in contract assets balance	(9,426)
Contract costs and recognized income not yet billed, noncurrent	7,700	7,500
Contract liabilities	22,964	$ 24,386
Increase (decrease) in contract liabilities	$ (1,422)

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ACQUISITIONS AND DISPOSITIONS - Acquisitions (Details) £ in Thousands, $ in Thousands, $ in Thousands					3 Months Ended	6 Months Ended
	Dec. 22, 2020 USD ($)	Dec. 22, 2020 AUD ($)	Nov. 29, 2019 USD ($)	Nov. 29, 2019 GBP (£)	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	Dec. 22, 2020 AUD ($)	Sep. 30, 2020 USD ($)
Business Acquisition [Line Items]
Goodwill | $							$ 446,365		$ 442,643
Acquisition costs | $					$ 2,960	$ 2,960
Quatro Design Pty Ltd
Business Acquisition [Line Items]
Cash payment to acquire business	$ 2,700	$ 3,500
Additional contingent consideration	760							$ 1,000
Intangible assets	2,082							2,755
Goodwill	$ 1,246							$ 1,648
Vatre Group Limited
Business Acquisition [Line Items]
Intangible assets				£ 3,454
Goodwill				£ 3,449
Percentage of outstanding stock acquired				100.00%
Business combination, consideration transferred			$ 10,500	£ 8,750
Inventory				2,914
Accounts receivable and other assets				2,492
Accounts payable and accrued liabilities				£ 3,765

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ACQUISITIONS AND DISPOSITIONS - Dispositions (Details) - Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations - Systems Engineering Group, Inc. - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2021	Sep. 30, 2020	Dec. 18, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received from business dispositions				$ 15,000
Revenue from disposed business	$ 7,000		$ 31,000
Gain (adjustment) on sale of SEG business		$ 5,291
Gain, net of tax, from business dispositions		$ 5,251
Gain per share from business dispositions		$ 0.10

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INVENTORIES - Summary of Inventories Stated at Lower Cost (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 155,720	$ 146,351
Work in process	86,299	83,697
Finished goods	242,734	183,777
Total	$ 484,753	$ 413,825

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PROPERTY, PLANT AND EQUIPMENT - Summary of Property Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 834,220	$ 815,517
Accumulated depreciation and amortization	(493,215)	(471,553)
Total	341,005	343,964
Land, building and building improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	169,081	167,005
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	611,187	595,126
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 53,952	$ 53,386

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PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 13,450	$ 13,316	$ 26,338	$ 26,748
Selling, general and administrative expenses
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 5,014	$ 4,910	$ 9,720	$ 9,861

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CREDIT LOSSES (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2021 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance, October 1, 2020	$ 8,505
Provision for expected credit losses	1,228
Amounts written off charged against the allowance	(161)
Other, primarily foreign currency translation	22
Ending Balance, March 31, 2021	$ 9,594

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GOODWILL AND OTHER INTANGIBLES - Summary of Changes in Carrying Value of Goodwill (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2021 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 442,643
Business Acquisitions	1,246
Business Divestitures	(811)
Foreign currency translations adjustments	3,287
Goodwill, ending balance	446,365
Consumer and Professional Products
Goodwill [Roll Forward]
Goodwill, beginning balance	232,845
Business Acquisitions	1,246
Business Divestitures	0
Foreign currency translations adjustments	3,287
Goodwill, ending balance	237,378
Home and Building Products
Goodwill [Roll Forward]
Goodwill, beginning balance	191,253
Business Acquisitions	0
Business Divestitures	0
Foreign currency translations adjustments	0
Goodwill, ending balance	191,253
Defense Electronics
Goodwill [Roll Forward]
Goodwill, beginning balance	18,545
Business Acquisitions	0
Business Divestitures	(811)
Foreign currency translations adjustments	0
Goodwill, ending balance	$ 17,734

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GOODWILL AND OTHER INTANGIBLES - Summary of Gross Carrying Value and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 208,718	$ 205,404
Accumulated Amortization	79,870	75,016
Trademarks	228,658	224,640
Total intangible assets	437,376	430,044
Customer relationships & other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	189,189	185,940
Accumulated Amortization	$ 71,840	66,656
Average Life (Years)	23 years
Technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 19,529	19,464
Accumulated Amortization	$ 8,030	$ 8,360
Average Life (Years)	13 years

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GOODWILL AND OTHER INTANGIBLES - Narrative (Details)	3 Months Ended		6 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($) unit
Goodwill and Intangible Assets Disclosure [Abstract]
Carry amount of intangible assets related to foreign currency translation	$ 5,250,000
Amortization expense	2,433,000	$ 2,403,000	$ 4,811,000	$ 4,796,000
Estimated amortization expense, remainder of fiscal year	4,574,000		4,574,000
Estimated amortization expense, year one	9,376,000		9,376,000
Estimated amortization expense, year two	9,224,000		9,224,000
Estimated amortization expense, year three	9,198,000		9,198,000
Estimated amortization expense, year four	9,198,000		9,198,000
Estimated amortization expense, year five	9,198,000		9,198,000
Estimated amortization expense, thereafter	$ 78,080,000		78,080,000
Number of reporting units for goodwill impairment testing | unit				3
Goodwill impairment			0
Indefinite-lived intangible asset (excluding goodwill) impairment			$ 0

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INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 10,748	$ 2,034	$ 20,417	$ 8,373
Income before taxes	27,860	2,929	67,029	19,880
Restructuring charges	7,562	3,104	18,362	9,538
Restructuring charges, net of tax	5,651	3,005	13,951	7,153
Effective income tax rate reconciliation, disposition of business	949		(5,291)
Effective income tax rate reconciliation, disposition of business, net of tax	766		(5,251)
Other tax expense (benefit) that affect comparability	$ 1,913	(1,413)	$ (115)	(580)
Effective income tax rate reconciliation, acquisition cost		2,960		2,960
Effective income tax rate reconciliation, acquisition cost, net of tax		2,321		2,321
Effective income tax rate reconciliation, debt extinguishment loss		6,690		6,690
Effective income tax rate reconciliation, debt extinguishment loss, net of tax		$ 5,245		$ 5,245
Effective tax rate	30.00%	35.90%	31.10%	34.40%

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LONG-TERM DEBT - Summary of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020	Jun. 22, 2020	Feb. 19, 2020
Debt Instrument [Line Items]
Long-term debt, Outstanding Balance	$ 1,074,915	$ 1,064,422
less: Current portion, Outstanding Balance	(14,913)	(9,922)
Long-term debt, Outstanding Balance, Non-current	1,060,002	1,054,500
Original Issuer Premium	339	363
less: Current portion, Original Issuer Premium	0	0
Long-term debt, Original Issuer Premium, Non-current	339	363
Capitalized Fees & Expenses	(16,482)	(17,821)
Long-term debt, Balance Sheet	1,058,772	1,046,964
less: Current portion, Balance Sheet	(14,913)	(9,922)
Long-term debt, Balance Sheet, Non-current	1,043,859	1,037,042
Senior notes due 2028
Debt Instrument [Line Items]
Long-term debt, Outstanding Balance	1,000,000	1,000,000
Original Issuer Premium	339	363
Capitalized Fees & Expenses	(14,329)	(15,376)
Long-term debt, Balance Sheet	$ 986,010	$ 984,987
Coupon Interest Rate	5.75%	5.75%	5.75%	5.75%
Revolver due 2025
Debt Instrument [Line Items]
Long-term debt, Outstanding Balance	$ 20,622	$ 12,858
Original Issuer Premium	0	0
Capitalized Fees & Expenses	(1,963)	(2,209)
Long-term debt, Balance Sheet	18,659	10,649
Finance lease - real estate
Debt Instrument [Line Items]
Long-term debt, Outstanding Balance	15,924	17,218
Original Issuer Premium	0	0
Capitalized Fees & Expenses	(17)	(30)
Long-term debt, Balance Sheet	$ 15,907	$ 17,188
Coupon Interest Rate	5.60%	5.60%
Non US lines of credit
Debt Instrument [Line Items]
Long-term debt, Outstanding Balance	$ 4,405	$ 0
Original Issuer Premium	0	0
Capitalized Fees & Expenses	(24)	(30)
Long-term debt, Balance Sheet	4,381	(30)
Non US term loans
Debt Instrument [Line Items]
Long-term debt, Outstanding Balance	29,870	31,086
Original Issuer Premium	0	0
Capitalized Fees & Expenses	(133)	(160)
Long-term debt, Balance Sheet	29,737	30,926
Other long term debt
Debt Instrument [Line Items]
Long-term debt, Outstanding Balance	4,094	3,260
Original Issuer Premium	0	0
Capitalized Fees & Expenses	(16)	(16)
Long-term debt, Balance Sheet	$ 4,078	$ 3,244

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LONG-TERM DEBT - Summary of Interest Expense Incurred (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Debt Instrument [Line Items]
Cash Interest, Capitalized Interest	$ (6)	$ (28)	$ (13)	$ (93)
Cash Interest	15,162	15,876	30,172	30,815
Amort. Debt Premium	12	45	24	112
Amort. Debt Issuance Costs & Other Fees	657	950	1,325	2,155
Total Interest Expense	$ 15,831	$ 16,871	$ 31,521	$ 33,082
Senior notes due 2028
Debt Instrument [Line Items]
Effective Interest Rate	6.00%	6.00%	6.00%	6.00%
Cash Interest, Including Amounts Capitalized	$ 14,375	$ 5,566	$ 28,750	$ 5,566
Amort. Debt Premium	12	0	24	0
Amort. Debt Issuance Costs & Other Fees	505	135	1,023	135
Total Interest Expense	14,892	$ 5,701	29,797	$ 5,701
Senior notes due 2022
Debt Instrument [Line Items]
Effective Interest Rate		5.70%		5.70%
Cash Interest, Including Amounts Capitalized	0	$ 8,040	0	$ 21,165
Amort. Debt Premium	0	45	0	112
Amort. Debt Issuance Costs & Other Fees	0	628	0	1,579
Total Interest Expense	0	8,713	0	22,856
Revolver due 2025
Debt Instrument [Line Items]
Cash Interest, Including Amounts Capitalized	287	1,819	416	3,201
Amort. Debt Premium	0	0	0	0
Amort. Debt Issuance Costs & Other Fees	122	165	245	397
Total Interest Expense	$ 409	$ 1,984	$ 661	$ 3,598
Finance lease - real estate
Debt Instrument [Line Items]
Effective Interest Rate	5.90%	6.10%	5.60%	6.00%
Cash Interest, Including Amounts Capitalized	$ 224	$ 52	$ 456	$ 113
Amort. Debt Premium	0	0	0	0
Amort. Debt Issuance Costs & Other Fees	7	7	13	13
Total Interest Expense	231	59	469	126
Non US lines of credit
Debt Instrument [Line Items]
Cash Interest, Including Amounts Capitalized	4	3	7	7
Amort. Debt Premium	0	0	0	0
Amort. Debt Issuance Costs & Other Fees	4	8	8	12
Total Interest Expense	8	11	15	19
Non US term loans
Debt Instrument [Line Items]
Cash Interest, Including Amounts Capitalized	163	292	334	564
Amort. Debt Premium	0	0	0	0
Amort. Debt Issuance Costs & Other Fees	18	7	35	19
Total Interest Expense	181	299	369	583
Other long term debt
Debt Instrument [Line Items]
Cash Interest, Including Amounts Capitalized	115	132	222	292
Amort. Debt Premium	0	0	0	0
Amort. Debt Issuance Costs & Other Fees	1	0	1	0
Total Interest Expense	$ 116	$ 132	$ 223	$ 292

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LONG-TERM DEBT - Narrative (Details) $ in Thousands		1 Months Ended			3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 22, 2020 USD ($)	Jul. 31, 2018 GBP (£)	Jul. 31, 2016 AUD ($)	Nov. 30, 2012 CAD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($) renewalOption	Mar. 31, 2020 USD ($)	Sep. 30, 2020 AUD ($)	Mar. 31, 2021 CAD ($)	Mar. 31, 2021 AUD ($)	Mar. 31, 2021 GBP (£)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 AUD ($)	Feb. 19, 2020 USD ($)	Jan. 30, 2020 USD ($)	Jan. 29, 2020 USD ($)	Sep. 30, 2019 AUD ($)	Jul. 31, 2016 USD ($)	Jul. 31, 2016 AUD ($)
Debt Instrument [Line Items]
Debt outstanding					$ 1,074,915,000		$ 1,074,915,000						$ 1,064,422,000
Loss from debt extinguishment					0	$ 6,690,000	0	$ 6,690,000
Basis spread on variable rate				1.30%
Mortgage loan balance					$ 1,058,772,000		$ 1,058,772,000						$ 1,046,964,000
Troy, Ohio
Debt Instrument [Line Items]
Percentage bearing fixed interest, percentage rate					5.00%		5.00%			5.00%	5.00%	5.00%
Ocala, Florida
Debt Instrument [Line Items]
Percentage bearing fixed interest, percentage rate					5.60%		5.60%			5.60%	5.60%	5.60%
Number of option to extend | renewalOption							2
Lease renewal term					5 years		5 years			5 years	5 years	5 years
Revolver due 2025
Debt Instrument [Line Items]
Maximum borrowing capacity																$ 400,000	$ 350,000,000
Maximum borrowing capacity, accordion feature																100,000,000
Maximum percentage of equity interest of subsidiaries borrowings guaranteed							65.00%
Long-term line of credit					$ 20,622,000		$ 20,622,000
Outstanding standby letters of credit					16,310,000		16,310,000
Remaining borrowing capacity					363,068,000		$ 363,068,000
Revolver due 2025 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate							0.50%
Revolver due 2025 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate							1.50%
Term Loan | Northcote Holdings Pty. Ltd
Debt Instrument [Line Items]
Face amount																				$ 29,625,000
Basis spread on variable rate			1.95%
Long-term line of credit					$ 10,192,000		$ 10,192,000				$ 13,375,000			$ 18,375,000				$ 23,375,000
Debt instrument, periodic payment, principal			$ 1,250,000
Periodic payment terms, balloon payment to be paid																				9,625,000
Debt instrument, interest rate, effective percentage					2.01%		2.01%			2.01%	2.01%	2.01%
Term loan balance change									$ 5,000,000
Term Loan | Ames UK
Debt Instrument [Line Items]
Face amount | £		£ 14,000,000
Debt instrument, periodic payment, principal | £		438,000
Periodic payment terms, balloon payment to be paid | £		£ 7,088,000
Mortgages | London Interbank Offered Rate (LIBOR) | Ames UK
Debt Instrument [Line Items]
Basis spread on variable rate		1.80%
Revolving Credit Facility | Northcote Holdings Pty. Ltd
Debt Instrument [Line Items]
Face amount																				$ 20,000,000
Basis spread on variable rate			1.90%
Mortgage loan balance					$ 0		$ 0
Debt instrument, interest rate, effective percentage					1.98%		1.98%			1.98%	1.98%	1.98%
Revolving Credit Facility | Ames UK
Debt Instrument [Line Items]
Face amount | £		£ 5,000,000
Basis spread on variable rate		1.50%
Mortgage loan balance					$ 4,405,000		$ 4,405,000					£ 3,204,000
Interest rate at period end					1.60%		1.60%			1.60%	1.60%	1.60%
Long-term line of credit, revolver outstanding balance					$ 0		$ 0
Term and Mortgage Loans | Ames UK
Debt Instrument [Line Items]
Mortgage loan balance					19,678,000		19,678,000					£ 14,313,000
Letter of Credit Subfacility | Revolver due 2025
Debt Instrument [Line Items]
Maximum borrowing capacity																100,000,000
Multicurrency Subfacility | Revolver due 2025
Debt Instrument [Line Items]
Maximum borrowing capacity																$ 200,000,000
Receivables Purchase Facility
Debt Instrument [Line Items]
Mortgage loan balance					$ 0		$ 0
Receivables Purchase Facility | Northcote Holdings Pty. Ltd
Debt Instrument [Line Items]
Face amount																			$ 10,000,000
Basis spread on variable rate			1.35%
Mortgage loan balance														$ 15,000,000				$ 10,000,000
Debt instrument, interest rate, effective percentage					1.41%		1.41%			1.41%	1.41%	1.41%
Increase in receivables purchase line									$ (5,000,000)
Senior notes due 2028
Debt Instrument [Line Items]
Face amount	$ 150,000,000														$ 850,000,000
Debt instrument, interest rate, stated percentage	5.75%				5.75%		5.75%			5.75%	5.75%	5.75%	5.75%	5.75%	5.75%
Debt instrument, issuance price (in percentage)	100.25%
Debt outstanding					$ 1,000,000,000		$ 1,000,000,000						$ 1,000,000,000
Capitalized fees and expenses					16,448,000		16,448,000
Mortgage loan balance					986,010,000		986,010,000						984,987,000
Senior notes due 2028 | Fair Value, Inputs, Level 1
Debt Instrument [Line Items]
Senior note, fair value disclosure					1,060,000,000		1,060,000,000
Senior notes due 2022
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.25%
Debt redeemed	$ 1,000,000,000
Loss from debt extinguishment					7,925,000
Write off of debt issuance costs					6,725,000
Tender offer net premium expense					607,000
Redemption interest expense					593,000
Senior Notes
Debt Instrument [Line Items]
Debt outstanding					1,000,000,000		1,000,000,000
ESOP Loans
Debt Instrument [Line Items]
Mortgage loan balance					28,608,000		28,608,000
Debt instrument, periodic payment, principal							$ 635,000
ESOP Loans | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate							2.91%
Non US lines of credit
Debt Instrument [Line Items]
Debt outstanding					4,405,000		$ 4,405,000						0
Remaining borrowing capacity					11,894,000		11,894,000			$ 15,000
Mortgage loan balance					$ 4,381,000		4,381,000						$ (30,000)
Proceeds from long-term lines of credit				$ 15,000			$ 11,894,000
Non US lines of credit | LIBOR Rate
Debt Instrument [Line Items]
Interest rate at period end					1.41%		1.41%			1.41%	1.41%	1.41%
Non US lines of credit | Bankers Acceptance Rate
Debt Instrument [Line Items]
Interest rate at period end					1.47%		1.47%			1.47%	1.47%	1.47%
Mortgages | Ames UK
Debt Instrument [Line Items]
Face amount | £		£ 4,000,000
Interest rate at period end					1.85%		1.85%			1.85%	1.85%	1.85%
Debt instrument, periodic payment, principal | £		105,000
Periodic payment terms, balloon payment to be paid | £		£ 2,349,000

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SHAREHOLDERS' EQUITY - Narrative (Details)			3 Months Ended						6 Months Ended		12 Months Ended
	Apr. 29, 2021 $ / shares	Jan. 30, 2020 shares	Mar. 31, 2021 USD ($) executive $ / shares shares	Dec. 31, 2020 USD ($) executive $ / shares shares	Sep. 30, 2020 $ / shares	Jun. 30, 2020 $ / shares	Mar. 31, 2020 $ / shares	Dec. 31, 2019 $ / shares	Mar. 31, 2021 USD ($) $ / shares shares	Mar. 31, 2020 $ / shares	Sep. 30, 2020 $ / shares	Aug. 01, 2018 USD ($)	Jan. 31, 2018 shares	Aug. 03, 2016 USD ($)
Class of Stock [Line Items]
Common stock, dividends, per share, cash paid (in dollars per share) | $ / shares			$ 0.08				$ 0.075		$ 0.16	$ 0.15
Stock repurchase program, authorized amount | $												$ 50,000,000		$ 50,000,000
Stock repurchase program, remaining authorized repurchase amount | $			$ 57,955,000						$ 57,955,000
Shares paid for tax withholding for share based compensation, value | $			$ 0
Restricted Stock and Restricted Stock Units
Class of Stock [Line Items]
Equity instruments other than options, grants in period (in shares)				511,624
Restricted Stock and Restricted Stock Units, Subject to Performance Conditions
Class of Stock [Line Items]
Award vesting period				3 years
Equity instruments other than options, grants in period (in shares)				226,811
Equity instruments other than options, granted in period, fair value | $				$ 5,500,000
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares				$ 24.25
Restricted Stock and Restricted Stock Units, Subject to Performance Conditions | Executive Officer
Class of Stock [Line Items]
Equity instruments other than options, grants in period (in shares)			203,282
Equity instruments other than options, granted in period, fair value | $			$ 4,923,000
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares			$ 24.22
Number of executive officers granted shares | executive			4
Restricted Stock and Restricted Stock Units, Subject to Performance Conditions | Senior Executives
Class of Stock [Line Items]
Award vesting period			4 years
Equity instruments other than options, grants in period (in shares)			528,000
Number of executive officers granted shares | executive			2
Award post-vesting holding period			2 years
Restricted Stock and Restricted Stock Units, Subject to Performance Conditions | Minimum | Executive Officer
Class of Stock [Line Items]
Award vesting period			34 months
Restricted Stock and Restricted Stock Units, Subject to Performance Conditions | Maximum | Executive Officer
Class of Stock [Line Items]
Award vesting period			60 months
Restricted Stock and Restricted Stock Units, Not Subject to Performance Conditions | Executive Officer
Class of Stock [Line Items]
Award vesting period				3 years
Equity instruments other than options, grants in period (in shares)				284,813
Equity instruments other than options, granted in period, fair value | $				$ 5,913,000
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares				$ 20.76
Number of executive officers granted shares | executive				5
Restricted Stock
Class of Stock [Line Items]
Equity instruments other than options, grants in period (in shares)			731,282
Equity instruments other than options, granted in period, fair value | $			$ 7,824,000
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares			$ 14.82
Shares paid for tax withholding for share based compensation (in shares)									133,027
Shares paid for tax withholding for share based compensation, value | $									$ 2,774,000
Shares paid for tax withholding for share based compensation, value per share (in dollars per share) | $ / shares									$ 20.85
Restricted Stock | Non-employees, directors
Class of Stock [Line Items]
Award vesting period			3 years
Equity instruments other than options, grants in period (in shares)			44,424
Equity instruments other than options, granted in period, fair value | $			$ 1,080,000
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares			$ 24.31
Restricted Stock | Executive Officer
Class of Stock [Line Items]
Number of executive officers granted shares | executive			6
Restricted Stock | Minimum
Class of Stock [Line Items]
Award vesting period									3 years
Number of shares vested in period			384,000
Restricted Stock | Maximum
Class of Stock [Line Items]
Award vesting period									4 years
Number of shares vested in period			528,000
Restricted Stock Units
Class of Stock [Line Items]
Shares paid for tax withholding for share based compensation (in shares)									6,507
Shares paid for tax withholding for share based compensation, value | $									$ 135,000
Shares paid for tax withholding for share based compensation, value per share (in dollars per share) | $ / shares									$ 20.75
Incentive Plan
Class of Stock [Line Items]
Number of shares authorized for award (in shares)			5,050,000						5,050,000				1,000,000
Number of additional shares authorized for award (in shares)		1,700,000
Share-based compensation arrangement by share-based payment award, expiration period									10 years
Maximum percentage of exercise price at grant date fair value									100.00%
Number of shares available for grant (in shares)			437,276						437,276
Incentive Plan | Incentive Stock Options
Class of Stock [Line Items]
Number of shares authorized for award (in shares)			600,000						600,000
Quarterly Dividend
Class of Stock [Line Items]
Common stock, dividends, per share, cash paid (in dollars per share) | $ / shares			$ 0.08	$ 0.08	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.16		$ 0.30
Quarterly Dividend | Subsequent Event
Class of Stock [Line Items]
Dividends declared, amount per share (in dollars per share) | $ / shares	$ 0.08

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SHAREHOLDERS' EQUITY SHAREHOLDERS EQUITY - Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Stockholders' Equity Note [Abstract]
Restricted stock	$ 4,349	$ 3,662	$ 7,777	$ 6,812
ESOP	944	658	1,724	1,490
Total stock based compensation	$ 5,293	$ 4,320	$ 9,501	$ 8,302

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EARNINGS PER SHARE (EPS) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Common shares outstanding (in shares)	56,684	47,431	56,684	47,431
Unallocated ESOP shares (in shares)	(1,961)	(2,159)	(1,961)	(2,159)
Non-vested restricted stock (in shares)	(3,822)	(3,562)	(3,822)	(3,562)
Impact of weighted average shares (in shares)	(63)	(145)	(184)	(341)
Weighted average shares outstanding - basic (in shares)	50,838	41,565	50,717	41,369
Incremental shares from stock based compensation (in shares)	2,426	2,169	2,494	2,457
Weighted average shares outstanding - diluted (in shares)	53,264	43,734	53,211	43,826

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BUSINESS SEGMENTS - Revenues (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3
Revenue	$ 634,832	$ 566,350	$ 1,244,123	$ 1,114,788
Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	331,871	274,912	622,913	515,988
Home and Building Products
Segment Reporting Information [Line Items]
Revenue	242,811	209,829	493,292	451,210
Defense Electronics
Segment Reporting Information [Line Items]
Revenue	$ 60,150	$ 81,609	$ 127,918	$ 147,590

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BUSINESS SEGMENTS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 634,832	$ 566,350	$ 1,244,123	$ 1,114,788
United States
Disaggregation of Revenue [Line Items]
Revenue	470,489	445,543	937,840	878,794
Europe
Disaggregation of Revenue [Line Items]
Revenue	44,797	34,622	64,858	47,235
Canada
Disaggregation of Revenue [Line Items]
Revenue	33,500	29,591	68,932	61,199
Australia
Disaggregation of Revenue [Line Items]
Revenue	63,813	39,221	133,672	94,055
All other countries
Disaggregation of Revenue [Line Items]
Revenue	22,233	17,373	38,821	33,505
Consumer and Professional Products
Disaggregation of Revenue [Line Items]
Revenue	331,871	274,912	622,913	515,988
Consumer and Professional Products | United States
Disaggregation of Revenue [Line Items]
Revenue	205,368	191,412	388,810	351,570
Consumer and Professional Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	38,965	24,737	52,121	31,342
Consumer and Professional Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	21,778	17,515	43,893	35,296
Consumer and Professional Products | Australia
Disaggregation of Revenue [Line Items]
Revenue	63,691	39,032	133,231	93,260
Consumer and Professional Products | All other countries
Disaggregation of Revenue [Line Items]
Revenue	2,069	2,216	4,858	4,520
Consumer and Professional Products | Residential repair and remodel
Disaggregation of Revenue [Line Items]
Revenue	50,560	40,505	96,160	75,595
Consumer and Professional Products | Retail
Disaggregation of Revenue [Line Items]
Revenue	153,746	144,904	292,994	264,524
Consumer and Professional Products | Residential new construction
Disaggregation of Revenue [Line Items]
Revenue	14,540	14,884	28,055	29,857
Consumer and Professional Products | Industrial
Disaggregation of Revenue [Line Items]
Revenue	9,958	10,535	19,489	21,158
Consumer and Professional Products | International excluding North America
Disaggregation of Revenue [Line Items]
Revenue	103,067	64,084	186,215	124,854
Home and Building Products
Disaggregation of Revenue [Line Items]
Revenue	242,811	209,829	493,292	451,210
Home and Building Products | United States
Disaggregation of Revenue [Line Items]
Revenue	230,955	199,060	467,486	426,010
Home and Building Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	41	5	41	28
Home and Building Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	9,797	7,867	21,285	19,120
Home and Building Products | Australia
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Home and Building Products | All other countries
Disaggregation of Revenue [Line Items]
Revenue	2,018	2,897	4,480	6,052
Home and Building Products | Residential repair and remodel
Disaggregation of Revenue [Line Items]
Revenue	120,827	100,808	246,942	222,805
Home and Building Products | Residential new construction
Disaggregation of Revenue [Line Items]
Revenue	27,233	22,721	55,660	50,218
Home and Building Products | Commercial construction
Disaggregation of Revenue [Line Items]
Revenue	94,751	86,300	190,690	178,187
Defense Electronics
Disaggregation of Revenue [Line Items]
Revenue	60,150	81,609	127,918	147,590
Defense Electronics | United States
Disaggregation of Revenue [Line Items]
Revenue	34,166	55,071	81,544	101,214
Defense Electronics | Europe
Disaggregation of Revenue [Line Items]
Revenue	5,791	9,880	12,696	15,865
Defense Electronics | Canada
Disaggregation of Revenue [Line Items]
Revenue	1,925	4,209	3,754	6,783
Defense Electronics | Australia
Disaggregation of Revenue [Line Items]
Revenue	122	189	441	795
Defense Electronics | All other countries
Disaggregation of Revenue [Line Items]
Revenue	18,146	12,260	29,483	22,933
Defense Electronics | U.S. Government
Disaggregation of Revenue [Line Items]
Revenue	35,045	53,623	82,369	96,324
Defense Electronics | International
Disaggregation of Revenue [Line Items]
Revenue	21,497	25,021	38,392	43,554
Defense Electronics | Commercial
Disaggregation of Revenue [Line Items]
Revenue	$ 3,608	$ 2,965	$ 7,157	$ 7,712

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BUSINESS SEGMENTS - Segment EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 67,781	$ 47,963	$ 142,421	$ 103,123
Depreciation and amortization	(15,883)	(15,719)	(31,149)	(31,544)
Loss from debt extinguishment, net	0	(6,690)	0	(6,690)
Income before taxes	27,860	2,929	67,029	19,880
Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	79,703	59,910	166,370	127,012
Depreciation and amortization	(15,733)	(15,566)	(30,949)	(31,241)
Operating Segments | Consumer and Professional Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	37,423	25,027	70,136	46,953
Depreciation and amortization	(8,620)	(8,222)	(16,819)	(16,453)
Operating Segments | Home and Building Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	40,060	30,635	88,429	71,336
Depreciation and amortization	(4,379)	(4,668)	(8,720)	(9,468)
Operating Segments | Defense Electronics
Segment Reporting Information [Line Items]
Adjusted EBITDA	2,220	4,248	7,805	8,723
Depreciation and amortization	(2,734)	(2,676)	(5,410)	(5,320)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated Expenses	(11,922)	(11,947)	(23,949)	(23,889)
Net interest expense	(15,527)	(16,561)	(31,172)	(32,511)
Depreciation and amortization	(15,883)	(15,719)	(31,149)	(31,544)
Loss from debt extinguishment, net	0	(6,690)	0	(6,690)
Restructuring charges	(7,562)	(3,104)	(18,362)	(9,538)
Acquisition costs	0	2,960	0	2,960
Gain (adjustment) on sale of SEG business	$ (949)	$ 0	$ 5,291	$ 0

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BUSINESS SEGMENTS - Depreciation, Amortization and Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	$ 15,883	$ 15,719	$ 31,149	$ 31,544
CAPITAL EXPENDITURES	12,060	9,347	23,986	22,519
Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	15,733	15,566	30,949	31,241
CAPITAL EXPENDITURES	12,058	9,277	23,984	22,237
Corporate
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	150	153	200	303
CAPITAL EXPENDITURES	2	70	2	282
Consumer and Professional Products | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	8,620	8,222	16,819	16,453
CAPITAL EXPENDITURES	6,813	3,800	13,720	7,532
Home and Building Products | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	4,379	4,668	8,720	9,468
CAPITAL EXPENDITURES	1,998	3,556	4,113	11,495
Defense Electronics | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	2,734	2,676	5,410	5,320
CAPITAL EXPENDITURES	$ 3,247	$ 1,921	$ 6,151	$ 3,210

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BUSINESS SEGMENTS - Summary of Segment Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Continuing assets	$ 2,517,460	$ 2,439,942
Assets of discontinued operations	6,820	8,497
Total Assets	2,524,280	2,448,439
Operating Segments
Segment Reporting Information [Line Items]
Continuing assets	2,300,889	2,191,040
Operating Segments | Consumer and Professional Products
Segment Reporting Information [Line Items]
Continuing assets	1,408,545	1,255,127
Operating Segments | Home and Building Products
Segment Reporting Information [Line Items]
Continuing assets	604,325	606,785
Operating Segments | Defense Electronics
Segment Reporting Information [Line Items]
Continuing assets	288,019	329,128
Corporate
Segment Reporting Information [Line Items]
Continuing assets	$ 216,571	$ 248,902

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EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Retirement Benefits [Abstract]
Interest cost	$ 745	$ 1,151	$ 1,489	$ 2,302
Expected return on plan assets	(2,545)	(2,586)	(5,089)	(5,172)
Amortization:
Prior service cost	0	4	0	8
Recognized actuarial loss	1,573	1,042	3,146	2,084
Net periodic expense (income)	$ (227)	$ (389)	$ (454)	$ (778)

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DISCONTINUED OPERATIONS - Balance Sheets Information (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Assets of discontinued operations:
Prepaid and other current assets	$ 1,525	$ 2,091
Other long-term assets	5,295	6,406
Total assets of discontinued operations	6,820	8,497
Liabilities of discontinued operations:
Accrued liabilities, current	4,600	3,797
Other long-term liabilities	6,415	7,014
Total liabilities of discontinued operations	$ 11,015	$ 10,811

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RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands			3 Months Ended				6 Months Ended
	Nov. 12, 2020 USD ($)	Sep. 30, 2020 USD ($) position	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($) position	Mar. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 7,562			$ 3,104	$ 18,362	$ 9,538
Non-cash charges			2,497	$ 5,794
Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring charges			7,502			3,104	10,581	9,538
Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring costs							7,891	4,846
Non-cash charges							$ 2,690	4,692
Impairment charge, operating lease								1,968
Impairment charge, leasehold improvements								671
Inventory write down								304
Impairment charge, manufacturing assets								1,749
Reduction of headcount | position							65
Voluntary Employee Retirement Plan | Defense Electronics
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		$ 4,300			$ 4,300
Restructuring charges					$ 2,120		$ 2,180
Reduction of headcount | position		90
Exit of Older Weather Radar Product Lines
Restructuring Cost and Reserve [Line Items]
Business exit costs				5,601
Minimum | Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Annual cash savings	$ 30,000
Reduction in inventory	30,000
Maximum | Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Annual cash savings	35,000
Reduction in inventory	35,000
One-time charges | Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	65,000
Capital investments | Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	65,000
Cash charges | Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	46,000
Personnel related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			782			1,658	3,264	3,792
Non-cash charges			0	0
Personnel related costs | Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	26,000
Restructuring costs							1,084	3,792
Facilities, exit costs and other
Restructuring Cost and Reserve [Line Items]
Restructuring charges			4,283			$ 914	6,807	1,054
Non-cash charges			$ 0	$ 0
Facilities, exit costs and other | Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	20,000
Restructuring costs							$ 6,807	$ 1,054
Asset write-downs | Next-generation Business Platform | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 19,000

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RESTRUCTURING CHARGES - Summary of the Restructuring and Other Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7,562	$ 3,104	$ 18,362	$ 9,538
Personnel related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	782	1,658	3,264	3,792
Facilities, exit costs and other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4,283	914	6,807	1,054
Non-cash facility and other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,497	532	8,291	4,692
Cost of goods and services
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,337	1,353	9,762	4,076
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 4,225	$ 1,751	$ 8,600	$ 5,462

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RESTRUCTURING CHARGES - Summary of Accrued Liability for the Restructuring and Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	$ 3,839	$ 2,965	$ 2,965
Restructuring charges	7,562	10,800
Cash payment	(8,113)	(4,132)
Non-cash charges	(2,497)	(5,794)
Accrued liability ending balance	791	3,839	791
Personnel related costs
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	3,585	2,701	2,701
Restructuring charges	782	2,482
Cash payment	(3,840)	(1,598)
Non-cash charges	0	0
Accrued liability ending balance	527	3,585	527
Facilities, exit costs and other
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	254	264	264
Restructuring charges	4,283	2,524
Cash payment	(4,273)	(2,534)
Non-cash charges	0	0
Accrued liability ending balance	264	254	264
Facility and Other Costs
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	0	0	0
Restructuring charges	2,497	5,794
Cash payment	0	0
Non-cash charges	(2,497)	(5,794)
Accrued liability ending balance	$ 0	$ 0	$ 0

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OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Other Income and Expenses [Abstract]
Other income (expense)	$ 847	$ 615	$ 806	$ 1,393
Foreign currency transaction gain (loss), before tax	320	745	(379)	369
Net periodic benefit income	227	389	454	778
Investment income, net	$ 55	$ (230)	386	$ (149)
Technology recognition award			$ 700

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WARRANTY LIABILITY - Narrative (Details)	6 Months Ended
	Mar. 31, 2021
DE | Minimum
Product Warranty Liability [Line Items]
Product warranty period	1 year
DE | Maximum
Product Warranty Liability [Line Items]
Product warranty period	2 years
HBP | Minimum
Product Warranty Liability [Line Items]
Product warranty period	1 year
HBP | Maximum
Product Warranty Liability [Line Items]
Product warranty period	10 years
CPP
Product Warranty Liability [Line Items]
Product warranty period	90 days

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WARRANTY LIABILITY - Changes in Warrant Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance, beginning of period	$ 10,834	$ 7,344	$ 10,843	$ 7,894
Warranties issued and changes in estimated pre-existing warranties	6,477	4,862	11,216	8,227
Actual warranty costs incurred	(4,633)	(4,417)	(9,381)	(8,332)
Balance, end of period	$ 12,678	$ 7,789	$ 12,678	$ 7,789

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OTHER COMPREHENSIVE INCOME (LOSS) - Summary of OCI (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	$ 5,883		$ (14,241)		$ 19,173	$ (7,354)
Total other comprehensive income (loss), tax	(1,108)		(593)		(1,257)	(639)
Total other comprehensive income (loss), net of taxes	4,775	$ 13,141	(14,834)	$ 6,841	17,916	(7,993)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	1,739		(16,471)		13,862	(10,001)
Total other comprehensive income (loss), tax	0		0		0	0
Total other comprehensive income (loss), net of taxes	1,739		(16,471)		13,862	(10,001)
Pension and other defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	1,585		847		3,735	1,694
Total other comprehensive income (loss), tax	(340)		(178)		(784)	(353)
Total other comprehensive income (loss), net of taxes	1,245		669		2,951	1,341
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	2,559		1,383		1,576	953
Total other comprehensive income (loss), tax	(768)		(415)		(473)	(286)
Total other comprehensive income (loss), net of taxes	$ 1,791		$ 968		$ 1,103	$ 667

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OTHER COMPREHENSIVE INCOME (LOSS) - AOCI (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ 764,431	$ 740,047	$ 700,151	$ 476,454	$ 494,693	$ 477,763
Foreign currency translation adjustments
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(11,821)		(25,683)
Pension and other defined benefit plans
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(43,647)		(46,598)
Cash flow hedges
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	1,292		189
Accumulated other comprehensive income (loss), attributable to parent
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (54,176)	$ (58,951)	$ (72,092)	$ (73,909)	$ (59,075)	$ (65,916)

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OTHER COMPREHENSIVE INCOME (LOSS) - Amounts Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total gain (loss)	$ 27,860		$ 2,929		$ 67,029	$ 19,880
Tax benefit (expense)	(10,748)		(2,034)		(20,417)	(8,373)
Net income	17,112	$ 29,500	895	$ 10,612	46,612	11,507
Pension and other defined benefit plans | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total gain (loss)	(1,573)		(1,046)		(3,146)	(2,092)
Cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total gain (loss)	(1,741)		1,050		(2,399)	994
Accumulated other comprehensive income (loss), attributable to parent | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total gain (loss)	(3,314)		4		(5,545)	(1,098)
Tax benefit (expense)	696		(1)		1,165	231
Net income	$ (2,618)		$ 3		$ (4,380)	$ (867)

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LEASES - Narrative (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2021 USD ($) renewalOption	Sep. 30, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Long-term debt | $	$ 1,058,772	$ 1,046,964
Finance Lease Obligation
Lessee, Lease, Description [Line Items]
Long-term debt | $	$ 15,907	$ 17,188
Troy, Ohio
Lessee, Lease, Description [Line Items]
Percentage bearing fixed interest, percentage rate	5.00%
Troy, Ohio | Finance Lease Obligation
Lessee, Lease, Description [Line Items]
Percentage bearing fixed interest, percentage rate	5.00%
Ocala, Florida
Lessee, Lease, Description [Line Items]
Percentage bearing fixed interest, percentage rate	5.60%
Number of option to extend | renewalOption	2
Lease renewal term	5 years
Ocala, Florida | Finance Lease Obligation
Lessee, Lease, Description [Line Items]
Percentage bearing fixed interest, percentage rate	5.60%
Number of option to extend | renewalOption	2

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LEASES - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Lease Cost
Fixed	$ 9,970	$ 9,187	$ 20,010	$ 18,739
Variable	2,087	1,823	4,134	3,576
Short-term	1,053	1,393	2,167	2,823
Total	$ 13,110	$ 12,403	$ 26,311	$ 25,138

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LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 22,099	$ 21,582
Financing cash flows from finance leases	1,865	1,940
Total	$ 23,964	$ 23,522

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LEASES - Summary of Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Operating Leases:
Operating right-of-use assets	$ 154,929	$ 161,627
Lease Liabilities:
Current portion of operating lease liabilities	30,685	31,848
Long-term operating lease liabilities	128,714	136,054
Total operating lease liabilities	159,399	167,902
Finance Leases:
Property, plant and equipment, net	$ 18,068	$ 18,774
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	PROPERTY, PLANT AND EQUIPMENT, net	PROPERTY, PLANT AND EQUIPMENT, net
Lease Liabilities:
Lease liabilities, notes payable and current portion of long-term debt	$ 3,110	$ 3,352
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Notes payable and current portion of long-term debt	Notes payable and current portion of long-term debt
Lease liabilities, long-term debt, net	$ 14,950	$ 15,339
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtNoncurrent	us-gaap:LongTermDebtNoncurrent
Total financing lease liabilities	$ 18,060	$ 18,691
Accumulated depreciation	$ 4,296	$ 2,383

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LEASES - Summary of Future Maturities of Lease Payments for Operating Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Operating Leases
2020	$ 19,128
2021	34,484
2022	26,884
2023	20,180
2024	18,214
2025	12,376
Thereafter	63,859
Total lease payments	195,125
Less: Imputed Interest	(35,726)
Present value of lease liabilities	159,399	$ 167,902
Finance Leases
2021	2,381
2021	3,087
2022	2,749
2023	2,195
2024	2,077
2025	2,075
Thereafter	7,777
Total lease payments	22,341
Less: Imputed Interest	(4,281)
Present value of lease liabilities	$ 18,060	$ 18,691

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LEASES - Weighted Average Lease Terms and Discount Rates (Details)	Mar. 31, 2021
Weighted-average remaining lease term (years)
Operating leases	8 years 1 month 6 days
Finance Leases	8 years 2 months 12 days
Weighted-average discount rate
Operating Leases	4.45%
Finance Leases	5.50%

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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	Apr. 30, 2009 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Net capital cost value in proposed remedial action plan	$ 10,000