BrightView (BV) 10-K 13 Nov 24 2024 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Oct. 31, 2024	Mar. 31, 2024
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Entity Registrant Name	BrightView Holdings, Inc.
Trading Symbol	BV
Entity Central Index Key	0001734713
Current Fiscal Year End Date	--09-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 500.3
Entity Common Stock, Shares Outstanding		95,000,000
Entity File Number	001-38579
Entity Tax Identification Number	46-4190788
Entity Address, Address Line One	980 Jolly Road
Entity Address, City or Town	Blue Bell
Entity Address, State or Province	PA
Entity Incorporation, State or Country Code	DE
Entity Address, Country	US
Entity Address, Postal Zip Code	19422
City Area Code	484
Local Phone Number	567-7204
Title of 12(b) Security	Common Stock, Par Value $0.01 Per Share
Security Exchange Name	NYSE
ICFR Auditor Attestation Flag	true
Document Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Document Financial Statement Error Correction [Flag]	false
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s Definitive Proxy Statement relating to the Annual Meeting of Stockholders, scheduled to be held on March 4, 2025, are i ncorporated by reference into Part III of this Report.
Auditor Name	Deloitte & Touche LLP
Auditor Location	Philadelphia, PA
Auditor Firm ID	34

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Current assets:
Cash and cash equivalents	$ 140.4	$ 67
Accounts receivable, net	415.2	442.3
Unbilled revenue	137.8	143.5
Other current assets	86.7	89.3
Total current assets	780.1	742.1
Property and equipment, net	391.9	315.2
Intangible assets, net	95.8	132.3
Goodwill	2,015.7	2,021.4
Operating lease assets	81.3	86.1
Other assets	27	55.1
Total assets	3,391.8	3,352.2
Current liabilities:
Accounts payable	144.1	136.2
Deferred revenue	83.8	68.2
Current portion of self-insurance reserves	52.8	54.8
Accrued expenses and other current liabilities	237.7	180.2
Current portion of operating lease liabilities	24.9	27.3
Total current liabilities	543.3	466.7
Long-term debt, net	802.5	888.1
Deferred tax liabilities	43.9	51.1
Self-insurance reserves	112.8	105.1
Long-term operating lease liabilities	62.6	65.1
Other liabilities	44.3	34.6
Total liabilities	1,609.4	1,610.7
Stockholders’ equity:
Preferred stock, $0.01 par value; 50,000,000 shares authorized; no shares issued or outstanding as of September 30, 2024 and September 30, 2023	0	0
Common stock, $0.01 par value; 500,000,000 shares authorized; 108,200,000 and 106,600,000 shares issued and 94,800,000 and 93,600,000 shares outstanding as of September 30, 2024 and September 30, 2023, respectively	1.1	1.1
Treasury stock, at cost; 13,400,000 and 13,000,000 shares as of September 30, 2024 and September 30, 2023, respectively	(173.5)	(170.4)
Additional paid-in capital	1,518.1	1,530.8
Accumulated deficit	(68.9)	(135.3)
Accumulated other comprehensive (loss) income	(1.5)	17.1
Total stockholders’ equity	1,275.3	1,243.3
Total liabilities, mezzanine equity and stockholders' equity	3,391.8	3,352.2
Series A Convertible Preferred Stock
Mezzanine equity:
convertible preferred stock	$ 507.1	$ 498.2

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	50,000,000	50,000,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	500,000,000	500,000,000
Common stock, issued	108,200,000	106,600,000
Common stock, outstanding	94,800,000	93,600,000
Treasury stock, shares	13,400,000	13,000,000
Series A Convertible Preferred Stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, issued	500,000	500,000
Preferred stock, outstanding	500,000	500,000
Percentage of cumulative dividend	7%	7%
Preferred stock, liquidation preference	$ 512	$ 503.2

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net service revenues	$ 2,767.1	$ 2,816	$ 2,774.6
Cost of services provided	2,121.5	2,137.1	2,099.8
Gross profit	645.6	678.9	674.8
Selling, general and administrative expense	496.5	533.4	534.9
Gain on divestiture	(43.6)	0	0
Amortization expense	35.8	44.5	51.5
Income from operations	156.9	101	88.4
Other (income) expense	(2)	6.7	15.5
Interest expense, net	62.4	97.4	53.3
Income (loss) before income taxes	96.5	(3.1)	19.6
Income tax expense	30.1	4.6	5.6
Net income (loss)	66.4	(7.7)	14
Less: dividends on Series A convertible preferred shares	35.7	3.2	0
Net income (loss) attributable to common stockholders	$ 30.7	$ (10.9)	$ 14
Earnings (loss) per share:
Basic earnings (loss) per share	$ 0.21	$ (0.12)	$ 0.14
Diluted earnings (loss) per share	$ 0.2	$ (0.12)	$ 0.14

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)		$ 66.4	$ (7.7)	$ 14
Net derivative (losses) gains and other costs arising during the period, net of tax expense of $(3.7), $9.5; and $1.7, respectively	[1]	(10.4)	26.5	4.2
Reclassification of (gains) into net income (loss), net of tax (expense) of $(2.9); $(3.8); and $(0.3), respectively		(8.2)	(11.4)	(0.7)
Other comprehensive (loss) income		(18.6)	15.1	3.5
Comprehensive income		$ 47.8	$ 7.4	$ 17.5
[1] Other costs include the effects of foreign currency translation adjustments which were immaterial during the periods presented.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net derivative (losses) gains and other costs arising during the period, net of tax expense	$ (3.7)	$ 9.5	$ 1.7
Reclassification of (gains) into net income (loss), net of tax (expense)	$ (2.9)	$ (3.8)	$ (0.3)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity and Mezzanine Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Preferred Stock
Balance at Sep. 30, 2021	$ 1,342.7	$ 1.1	$ 1,489.1	$ (141.6)	$ (1.5)	$ (4.4)	$ 0
Balance, Shares at Sep. 30, 2021		105.2					0
Net Income (Loss)	14			14
Other comprehensive income (loss), net of tax	3.5				3.5
Capital contributions and issuance of common stock	1.5		1.5
Capital contributions and issuance of common stock, Shares		0.5
Equity-based compensation	18.9		18.9
Repurchase of common stock and distributions	(163.8)					(163.8)
Balance at Sep. 30, 2022	1,216.8	$ 1.1	1,509.5	(127.6)	2	(168.2)	$ 0
Balance, Shares at Sep. 30, 2022		105.7					0
Net Income (Loss)	(7.7)			(7.7)
Other comprehensive income (loss), net of tax	15.1				15.1
Capital contributions and issuance of common stock	2.4		2.4
Capital contributions and issuance of common stock, Shares		0.9
Equity-based compensation	22.1		22.1
Repurchase of common stock and distributions	(2.2)					(2.2)
Issuance of Series A preferred stock, net of issuance costs							$ 495
Issuance of Series A preferred stock, net of issuance costs, Shares							0.5
Dividends on Series A convertible preferred shares	(3.2)		(3.2)				$ 3.2
Balance at Sep. 30, 2023	1,243.3	$ 1.1	1,530.8	(135.3)	17.1	(170.4)	$ 498.2
Balance, Shares at Sep. 30, 2023		106.6					0.5
Net Income (Loss)	66.4			66.4
Other comprehensive income (loss), net of tax	(18.6)				(18.6)
Capital contributions and issuance of common stock	2.8		2.8
Capital contributions and issuance of common stock, Shares		1.6
Equity-based compensation	20.2		20.2
Repurchase of common stock and distributions	(3.1)					(3.1)
Dividends on Series A convertible preferred shares	(35.7)		(35.7)				$ 8.9
Balance at Sep. 30, 2024	$ 1,275.3	$ 1.1	$ 1,518.1	$ (68.9)	$ (1.5)	$ (173.5)	$ 507.1
Balance, Shares at Sep. 30, 2024		108.2					0.5

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income (loss)		$ 66.4	$ (7.7)	$ 14
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation		108.4	105.2	98.9
Amortization of intangible assets		35.8	44.5	51.5
Amortization of financing costs and original issue discount		2.8	3.5	3.7
Loss on debt extinguishment	[1]	0.6	8.3	12.6
Deferred taxes		1.7	(21.5)	(6.6)
Equity-based compensation		20.2	22.1	18.9
Realized gain on hedges		(11.1)	(15.2)	(1)
Gain on divestiture		(43.6)	0	0
Other non-cash activities		(8.6)	(5.3)	(1.7)
Change in operating assets and liabilities:
Accounts receivable		19.9	(52.6)	(6.3)
Unbilled and deferred revenue		22.1	(5.4)	(6.9)
Other operating assets		11.4	17.1	(10.5)
Accounts payable and other operating liabilities		(20.4)	36.9	(59.7)
Net cash provided by operating activities		205.6	129.9	106.9
Cash flows from investing activities:
Purchase of property and equipment		(78.4)	(71.3)	(107.3)
Proceeds from sale of property and equipment		18.1	21.6	7.1
Business acquisitions, net of cash acquired		0	(13.8)	(93.1)
Proceeds from divestiture		51	0	0
Other investing activities		3.7	2.1	(0.4)
Net cash (used) by investing activities		(5.6)	(61.4)	(193.7)
Cash flows from financing activities:
Repayments of finance lease obligations		(36.3)	(27.6)	(27)
Repayments of term loan		0	(459)	(1,006.3)
Repayments of receivables financing agreement		(87.3)	(554.5)	(374.4)
Repayments of revolving credit facility		0	(33.5)	(165)
Proceeds from term loan, net of issuance costs		0	0	1,180.1
Proceeds from receivables financing agreement, net of issuance costs		0.5	549.5	391.7
Proceeds from revolving credit facility		0	33.5	165
Debt issuance and prepayment costs		(2.5)	(1.8)	(4.6)
Series A preferred stock dividend		(17.8)	0	0
Proceeds from issuance of Series A preferred stock, net of issuance costs		0	495	0
Proceeds from issuance of common stock, net of share issuance costs		3	1.2	1.6
Repurchase of common stock and distributions		(3.1)	(2.2)	(163.8)
Contingent business acquisition payments		(5.1)	(22.1)	0
Increase in book overdrafts		20.1	0	0
Other financing activities		1.9	(0.1)	(14.1)
Net cash (used) by financing activities		(126.6)	(21.6)	(16.8)
Net change in cash and cash equivalents		73.4	46.9	(103.6)
Cash and cash equivalents, beginning of period		67	20.1	123.7
Cash and cash equivalents, end of period		140.4	67	20.1
Supplemental Cash Flow Information:
Cash (received) paid for income taxes, net		34.4	(9.8)	17.3
Cash paid for interest		67.7	82.1	48.7
Accrual for property and equipment		50.7	0	0
Series A Convertible Preferred Stock
Supplemental Cash Flow Information:
Non-cash Series A Preferred Stock dividends		$ 8.9	$ 3.2	$ 0
[1] Represents losses on the extinguishment of debt related to Amendments No. 6, No. 7, and No. 8 to the Credit Agreement, in the fiscal years ended September 30, 2022, 2023, and 2024 respectively, and includes accelerated amortization of deferred financing fees and original issue discount as well as fees paid to lenders and third parties.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 66.4	$ (7.7)	$ 14

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Business

Business	12 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	1. Business BrightView Holdings, Inc. (the “Company” and, collectively with its consolidated subsidiaries, “BrightView”) provides landscape maintenance and enhancements, landscape development, snow removal and other landscape related services for commercial customers throughout the United States. BrightView is aligned into two reportable segments: Maintenance Services and Development Services. Basis of Presentation These consolidated financial statements have been prepared by the Company in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and include the accounts of the Company and its wholly-owned subsidiaries which are directly or indirectly owned by the Company. Results of acquired companies are included in the consolidated financial statements from the effective date of the acquisition. All intercompany transactions and account balances have been eliminated. Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the period. On an ongoing basis, management reviews its estimates, including those related to allowances for doubtful accounts, revenue recognition, self-insurance reserves, estimates related to the Company’s assessment of goodwill for impairment, useful lives for depreciation and amortization, realizability of deferred tax assets, and litigation based on currently available information. Changes in facts and circumstances may result in revised estimates and actual results may differ from estimates.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Cash and Cash Equivalents Cash and cash equivalents include deposits in banks and money market funds with maturities of less than three months at the time of deposit or investment. Under our cash management system, checks issued but not yet presented to banks that would result in negative bank balances when presented are classified as a current liability in the Consolidated Balance Sheets. Changes in book overdrafts from period to period are reported in the Consolidated Statements of Cash Flows as a financing activity. Accounts Receivable Accounts receivable are recorded at the invoiced amount and do not bear interest. The Company reserves for all accounts that are deemed to be uncollectible and reviews its allowance for doubtful accounts regularly. The allowance is based on the age of receivables and a specific identification of receivables considered at risk, representing its best estimate of probable credit losses in existing trade accounts receivable (see Note 5 "Accounts Receivable, net"). Account balances are written off against the allowance when the potential for recovery is considered remote. Accounts receivable also includes customer balances that have been billed or are billable to the Company’s customers but will not be collected until completion of the project or as otherwise specified in the contract. These amounts generally represent 5 - 10 % of the total contract value. Property and Equipment Property and equipment is carried at cost, including the cost of labor for internal use software, less accumulated depreciation, except for those assets acquired through a business combination, in which case they have been stated at estimated fair value as of the date of the business combination, less accumulated depreciation. Costs of replacements or maintenance and repairs that do not improve or extend the life of the related assets are expensed as incurred. Depreciation is computed using the straight-line method over the estimated useful lives of the assets and included in Cost of services provided or Selling, general and administrative expense as appropriate. Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the fair values of the underlying net assets acquired in an acquisition. Goodwill is not amortized, but rather is tested annually for impairment, or more frequently if events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. The Company tests goodwill for impairment annually in the fourth quarter of each year using data as of July 1 of that year. Goodwill is allocated to, and evaluated for impairment at, the Company’s two identified reporting units. Goodwill is tested for impairment by either performing a qualitative evaluation or a quantitative test. The qualitative evaluation is an assessment of factors to determine whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount. The Company may elect not to perform the qualitative assessment for some or all reporting units and perform the quantitative impairment test. The quantitative goodwill impairment test requires the Company to compare the carrying value of the reporting unit’s net assets to the estimated fair value of the reporting unit. The Company determines the estimated fair values of each of the reporting units using a combination of the income and market multiple approaches. The estimates used in each approach include significant management assumptions, including valuation multiples of selected guideline public companies, long-term future growth rates, operating margins, and discount rates. If the estimated fair value exceeds the carrying value, no further evaluation is required, and no impairment loss is recognized. If the carrying amount of a reporting unit, including goodwill, exceeds the estimated fair value, the excess of the carrying value over the estimated fair value is recorded as an impairment loss, the amount of which is not to exceed the total amount of goodwill allocated to the reporting unit. Definite-lived intangible assets consist of acquired customer contracts and relationships, non-compete agreements and trademarks. Acquired customer relationships are amortized in an accelerated pattern consistent with expected future cash flows. Non-compete agreements and trademarks are amortized straight-line over their estimated useful lives. Impairment of Long-lived Assets Property and equipment and definite-lived intangible assets are reviewed for impairment annually, or whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized for the amount by which the carrying amount of the asset exceeds the fair value. Financing Costs Financing costs, consisting of fees and other expenses associated with borrowings, are amortized over the terms of the related borrowings using the effective interest rate method (see Note 9 "Long-term Debt "). Financing costs are presented in the Consolidated Balance Sheets as a direct reduction from the carrying amount of the related borrowings. Self-Insurance Reserves The Company carries general liability, auto liability, workers’ compensation, and employee health care insurance policies. In addition, the Company carries other reasonable and customary insurance policies for a Company of our size and scope, as well as umbrella liability insurance policies to cover claims over the liability limits contained in the primary policies. The Company’s insurance programs for general liability, vehicle liability, workers’ compensation and employee health care for certain employees contain self-insured retention amounts. Claims that are not self-insured as well as claims in excess of the self-insured retention amounts are insured. The Company uses estimates in the determination of the required reserves. These estimates are based upon calculations performed by third-party actuaries, as well as examination of historical trends, demographic factors and industry claims experience. A receivable for an insurance recovery is generally recognized when the loss has occurred and collection is considered probable (see Note 14 "Commitments and Contingencies "). Fair value of Financial Instruments In evaluating the fair value of financial assets and liabilities, GAAP outlines a valuation framework and creates a fair value hierarchy that distinguishes between market assumptions based on market data (“observable inputs”) and a reporting entity’s own assumptions about market data (“unobservable inputs”). Fair value is defined as the price at which an orderly transaction to sell an asset or transfer a liability would take place between market participants at the measurement date under current market conditions (that is, an exit price at the measurement date from the perspective of a market participant that holds the asset or owes the liability). Fair Value Hierarchy The following hierarchy for inputs used in measuring fair value should maximize the use of observable inputs and minimize the use of unobservable inputs by requiring that the most observable inputs be used when available: Level 1 Quoted prices in active markets for identical assets or liabilities that are accessible at the measurement dates. Level 2 Significant observable inputs that are used by market participants in pricing the asset or liability based on market data obtained from independent sources. Level 3 Significant unobservable inputs the Company believes market participants would use in pricing the asset or liability based on the best information available. The carrying amounts shown for the Company’s cash and cash equivalents, accounts receivable and accounts payable approximate fair value due to the short-term maturity of those instruments. The valuation is based on settlements of similar financial instruments, all of which are short-term in nature and are generally settled at or near cost. See Note 9 "Long-term Debt", Note 10 "Fair Value Measurements and Derivative Instruments" and Note 16 "Mezzanine Equity " for other financial instruments subject to fair value estimates. Derivative Instruments and Hedging Activities The Company’s objective in entering into derivative transactions is to manage its exposure to interest rate movements associated with its variable rate debt and changes in fuel prices. The Company recognizes derivatives as either assets or liabilities on the Consolidated Balance Sheets and measures those instruments at fair value. Since all of the Company’s derivatives are designated as cash flow hedges, the entire change in the fair value of the derivative included in the assessment of hedge effectiveness is initially reported in Other comprehensive (loss) income and subsequently reclassified to Interest expense, net (interest rate contracts) or Cost of services provided (fuel hedge contracts) in the accompanying Consolidated Statements of Operations at the time the hedge transaction affects earnings. If it is determined that a derivative is not highly effective as a hedge, or if the hedged forecasted transaction is no longer probable of occurring, the amount recognized in Accumulated other comprehensive (loss) income is released to earnings. See Note 10 "Fair Value Measurements and Derivative Instruments " for more information. Revenue Recognition The Company’s revenue is generated from Maintenance Services and Development Services. The Company generally recognizes revenue from the sale of services as the services are performed, which is typically ratably over the terms of the contracts , which the Company believes to be the best measure of progress. The Company recognizes revenues as it transfers control of products and services to its customers in an amount reflecting the total consideration it expects to receive from the customer. Revenue is recognized according to the following five step model: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenues when a performance obligation is satisfied. The Company determined that for contracts containing multiple performance obligations, stand-alone selling price is readily determinable for each performance obligation and therefore allocation of the transaction price to multiple performance obligations is not necessary. The transaction price will include estimates of variable consideration, such as returns and provisions for doubtful accounts and sales incentives, to the extent it is probable that a significant reversal of revenue recognized will not occur. In all cases, when a sale is recorded by the Company, no significant uncertainty exists surrounding the purchaser’s obligation to pay. The Company’s Maintenance Services revenues are generated primarily through landscape maintenance services and snow removal services. Landscape maintenance services that are primarily viewed as non-discretionary, such as lawn care, mowing, gardening, mulching, leaf removal, irrigation and tree care, are provided under recurring annual contracts, which typically range from one to three years in duration and are generally cancellable by the customer with 30-90 days’ notice. Snow removal services are provided on either fixed fee based contracts or per occurrence contracts. Both landscape maintenance services and snow removal services can also include enhancement services that represent supplemental maintenance or improvement services generally provided under contracts of short duration related to specific services. Revenue for landscape maintenance and snow removal services under fixed fee models is recognized over time using an output based method. Additionally, a portion of the Company’s recurring fixed fee landscape maintenance and snow removal services are recorded under the series guidance. The right to invoice practical expedient is generally applied to revenue related to per occurrence contracts as well as enhancement services. When the practical expedient is not applied, revenue is recognized using a cost-to-cost input method. Fees for contracted landscape maintenance services are typically billed on an equal monthly basis. Fees for fixed fee snow removal services are typically billed on an equal monthly basis during snow season, while fees for time and material or other activity-based snow removal services are typically billed as the services are performed. Fees for enhancement services are typically billed as the services are performed. Development Services revenues are generated primarily through landscape architecture and development services. For Development Services, revenue is primarily recognized over time using the cost-to-cost input method, measured by the percentage of cost incurred to date to the estimated total cost for each contract. The full amount of anticipated losses on contracts is recorded as soon as such losses can be estimated. Changes in job performance, job conditions, and estimated profitability, including final contract settlements, may result in revisions to costs and revenue and are recognized in the period in which the revisions are determined. When contract revenue is recognized in excess of the amount the Company has invoiced or has the right to invoice, a contract asset is recognized. Contract assets are transferred to Accounts receivable, net when the rights to the consideration become unconditional. Contract assets are presented as Unbilled revenue on the Consolidated Balance Sheets. Contract liabilities consist of consideration that is contractually due from customers, or payments thereof, in advance of providing the product or performing services such that control has not passed to the customer. Contract liabilities are presented as Deferred revenue on the Consolidated Balance Sheets. Cost of Services Provided Cost of services provided represents the cost of labor, subcontractors, materials, vehicle and equipment costs (including depreciation, fuel and maintenance) and other costs directly associated with revenue generating activities. These costs are expensed as incurred. Leases The Company leases office space, branch locations, vehicles, and operating equipment. Lease agreements are evaluated to determine whether they are finance or operating leases. If substantially all of the risks and benefits of property ownership are expected to transfer to the Company, the lease qualifies as a finance lease. Finance leases are capitalized at the lower of net present value of the total amount of rent payable under the leasing agreement (utilizing the implicit borrowing rate of the Company, as applicable) or the fair market value of the leased asset. Finance lease assets are depreciated on a straight-line basis, over a period consistent with the Company’s normal depreciation policy for property and equipment, but not exceeding the lease term. Interest charges are expensed over the period of the lease in relation to the carrying value of the finance lease obligation. Equity-based Compensation The Company’s equity-based compensation consists of stock options, restricted stock awards, restricted stock units and performance stock units. The Company expenses equity-based compensation using the estimated fair value as of the grant date over the requisite service or performance period applicable to the grant. Estimates of future forfeitures are made at the date of grant and revised, if necessary, in later periods if subsequent information indicates actual forfeitures will differ from those estimates. See Note 13 "Equity-Based Compensation " for more information. Income Taxes Deferred tax assets and liabilities are determined based on differences between financial reporting and tax basis of assets and liabilities, and are measured by applying enacted tax rates and laws for the taxable years in which those differences are expected to reverse. Deferred tax assets are evaluated for the estimated future tax effects of deductible temporary differences and tax operating loss carryovers. A valuation allowance is recorded when it is more likely than not that a deferred tax asset will not be realized. The Company records a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in a tax return. We assess income tax positions for all years subject to examination based upon our evaluation of the facts, circumstances and information available at the reporting date. For those income tax positions where it is not more likely than not that a tax benefit would be sustained upon ultimate settlement with a taxing authority assumed to have full knowledge of all relevant information, the Company would record a liability for unrecognized tax benefits. The Company recognizes interest and penalties, if any, related to unrecognized tax benefits in income tax expense and benefit.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Sep. 30, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements	3. Recent Accounting Pronouncements Simplifying the Accounting for Income Taxes In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes which removes specified exceptions and adds requirements to simplify the accounting for income taxes. The Company adopted the guidance in the first quarter of fiscal 2022. The adoption of ASU 2019-12 did not have a material impact on its consolidated financial statements and disclosures. Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting which provides optional expedients and exceptions for the accounting for contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The guidance in ASU 2020-04 is optional and may be elected over time as reference rate reform activities occur. In January 2021, the FASB issued ASU 2021-01 to clarify the scope of certain optional expedients for derivatives that are affected by the discounting transition. In December 2022, the FASB issued ASU 2022-06 to defer the sunset date of Topic 848 from December 31, 2022, to December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848. As of September 30, 2024, the Company was not party to any contracts, hedging relationships, or other transactions affected by reference rate reform. Business Combinations In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers which requires that an entity (acquirer) recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606 as if it had originated the contracts. The Company adopted the guidance in the first quarter of fiscal 2023. The adoption of ASU No. 2021-08 did not have a material impact on the Company’s consolidated financial statements and disclosures. Segment Reporting In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The ASU expands public entities' segment disclosures by requiring disclosure of significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss, an amount and description of its composition for other segment items, and interim disclosures of a reportable segment's profit or loss and assets. The purpose of the guidance is to enable investors to better understand an entity's overall performance and assess potential future cash flows. The amendment is effective for fiscal years beginning after December 15, 2023 and interim periods in fiscal years beginning after December 15, 2024. The Company is in the process of evaluating the impact of ASU No. 2023-07 on its financial statements. Income Taxes In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The ASU expands public entities tax disclosures including improving disclosures surrounding the company's rate reconciliation, cash taxes paid, and disaggregation of income tax expense (or benefit) from continuing operations. The amendment is effective for annual periods beginning after December 15, 2024. The Company is in the process of evaluating the impact of ASU No. 2023-09 on its consolidated financial statements. Income Statement In November 2024, the FASB issued ASU No. 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. The ASU requires new tabular disclosures disaggregating prescribed expense categories within relevant income statement captions. The amendment is effective for annual periods beginning after December 15, 2026 and interim periods in fiscal years beginning after December 15, 2027. The Company is in the process of evaluating the impact of ASU No. 2024-03 on its consolidated financial statements.

Revenue

Revenue	12 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue	4. Revenue Disaggregation of revenue The following table presents the Company’s reportable segment revenues, disaggregated by revenue type. The Company disaggregates revenue from contracts with customers into major services lines. The Company has determined that disaggregating revenue into these categories depicts how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. As noted in the business segment reporting information in Note 15 "Segments", the Company’s reportable segments are Maintenance Services and Development Services. Fiscal Year Ended September 30, 2024 2023 2022 Landscape Maintenance $ 1,743.2 $ 1,857.5 $ 1,825.7 Snow Removal 220.8 209.0 256.3 Maintenance Services 1,964.0 2,066.5 2,082.0 Development Services 808.8 758.0 698.8 Eliminations ( 5.7 ) ( 8.5 ) ( 6.2 ) Net service revenues $ 2,767.1 $ 2,816.0 $ 2,774.6 Remaining Performance Obligations Remaining performance obligations represent the estimated revenue expected to be recognized in the future related to performance obligations which are fully or partially unsatisfied at the end of the period. As of September 30, 2024, the estimated future revenues for remaining performance obligations that are part of a contract that has an original expected duration of greater than one year was approximately $ 546.4 . The Company expects to recognize revenue on 54 % of the remaining performance obligations over the next 12 months and an additional 46 % over the 12 months thereafter. Contract Assets and Liabilities When a contract results in revenue being recognized in excess of the amount the Company has invoiced or has the right to invoice to the customer, a contract asset is recognized. Contract assets are transferred to Accounts receivable, net when the rights to the consideration become unconditional. Contract assets are presented as Unbilled revenue on the Consolidated Balance Sheets. There were $ 185.0 of amounts billed during the period and $ 179.3 of additions to our unbilled revenue balance during the twelve month period ended September 30, 2024. Contract liabilities consist of payments received from customers, or such consideration that is contractually due, in advance of providing the product or performing services such that control has not passed to the customer. Contract liabilities are presented as Deferred revenue on the Consolidated Balance Sheets. Changes in Deferred revenue for the fiscal year ended September 30, 2024 were as follows: Deferred Balance, September 30, 2023 $ 68.2 Recognition of revenue ( 1,180.8 ) Deferral of revenue 1,197.2 Divestiture (Note 7) ( 0.9 ) Balance, September 30, 2024 $ 83.8 Practical Expedients and Exemptions The Company offers certain interest-free contracts to customers where payments are received over a period not exceeding one year. Additionally, certain Maintenance Services and Development Services customers may pay in advance for services. The Company does not adjust the promised amount of consideration for the effects of these financing components . At contract inception, the period of time between the performance of services and the customer payment is one year or less. As permitted under the practical expedient available under ASU No. 2014-09, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less, (ii) contracts with variable consideration that is allocated entirely to unsatisfied performance obligations or to a wholly unsatisfied promise accounted for under the series guidance and (iii) contracts for which the Company recognizes revenue at the amount which we have the right to invoice for services performed.

Accounts Receivable, net

Accounts Receivable, net	12 Months Ended
	Sep. 30, 2024
Receivables [Abstract]
Accounts Receivable, net	5. Accounts Receivable, net Accounts receivable of $ 415.2 and $ 442.3 , is net of an allowance for doubtful accounts of $ 10.0 and $ 5.1 and includes amounts of retention on incomplete projects to be completed within one year of $ 65.7 and $ 58.7 at September 30, 2024 and September 30, 2023 , respectively.

Property and Equipment, net

Property and Equipment, net	12 Months Ended
	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Property and Equipment, net	6. Property and Equipment, net Property and equipment, net consists of the following: Useful Life September 30, September 30, Land — $ 42.9 $ 44.7 Buildings and leasehold improvements 2 - 40 yrs. 46.7 45.6 Operating equipment 2 - 7 yrs. 388.3 338.8 Transportation vehicles 3 - 7 yrs. 403.1 351.9 Office equipment and software 3 - 10 yrs. 48.6 68.7 Construction in progress — 4.9 7.7 Property and equipment 934.5 857.4 Less: Accumulated depreciation 542.6 542.2 Property and equipment, net $ 391.9 $ 315.2 Construction in progress includes costs incurred for software and other assets that have not yet been placed in service. Depreciation expense related to property and equipment was $ 108.4 , $ 105.2 and $ 98.9 for the years ended September 30, 2024 , September 30, 2023 and September 30, 2022 , respectively.

Intangible Assets, Goodwill, Ac

Intangible Assets, Goodwill, Acquisitions and Divestitures	12 Months Ended
	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, Goodwill and Acquisitions	7. Intangible Assets, Goodwill, Acquisitions, and Divestitures Intangible Assets Identifiable intangible assets consist of acquired customer contracts and relationships, trademarks and non-compete agreements. Amortization expense related to intangible assets was $ 35.8 , $ 44.5 and $ 51.5 for the years ended September 30, 2024, September 30, 2023 and September 30, 2022 , respectively. These assets are amortized over their estimated useful lives, the reasonableness of which are continually evaluated by the Company. There were no intangible assets acquired during the year ended September 30, 2024. The weighted average amortization period of intangible assets acquired during the year ended September 30, 2023 was seven years . Intangible assets as of September 30, 2024 and September 30, 2023 consisted of the following: September 30, 2024 September 30, 2023 Estimated Gross Accumulated Gross Accumulated Customer relationships 6 - 21 yrs. $ 715.9 $ ( 620.1 ) $ 725.5 $ ( 594.1 ) Trademarks 12 yrs. — — 3.8 ( 2.9 ) Non-compete agreements 5 yrs. — — 2.7 ( 2.7 ) Total intangible assets $ 715.9 $ ( 620.1 ) $ 732.0 $ ( 599.7 ) Amortization expense is anticipated to be as follows in future years: Fiscal Year Ended September 30, 2025 $ 29.3 2026 21.8 2027 15.2 2028 11.1 2029 7.2 2030 and thereafter 11.2 $ 95.8 Goodwill The following is a summary of the goodwill activity for the periods ended September 30, 2023 and September 30, 2024: Maintenance Development Total Balance, September 30, 2022 $ 1,792.7 $ 216.1 $ 2,008.8 Acquisitions (1) 10.7 1.9 12.6 Balance, September 30, 2023 $ 1,803.4 $ 218.0 $ 2,021.4 Acquisitions (1) 0.1 — 0.1 Divestiture ( 5.8 ) — ( 5.8 ) Balance, September 30, 2024 $ 1,797.7 $ 218.0 $ 2,015.7 (1) The acquisitions adjustments include the immaterial impact of foreign currency and other prior year measurement period adjustments during the respective periods. The Company performed its annual goodwill impairment assessment as of July 1, 2024 utilizing a quantitative test approach as described in Note 2 "Summary of Significant Accounting Policies". Acquisitions During the year ended September 30, 2023 , the Company acquired, through a series of separate transactions, 100 % of the operations of three unrelated companies, all of which was allocated to Maintenance Services. The Company paid approximately $ 13.8 in aggregate consideration for the acquisitions, net of cash acquired. The Company accounted for the business combinations under the acquisition method and, accordingly, recorded the assets acquired and liabilities assumed at their estimated fair market values based on management’s preliminary estimates, with the excess allocated to goodwill. The purchase accounting related to these acquisitions was finalized within one year from each acquisition date. As a result of final purchase accounting, certain of the fair value amounts previously estimated were adjusted during the measurement period. The fair values were primarily estimated using Level 3 assumptions within the fair value hierarchy, including estimated future cash flows, discount rates and other factors. The measurement period adjustments were not material to the Consolidated Balance Sheets as of September 30, 2024 and September 30, 2023. The identifiable assets acquired as part of the fiscal 2023 acquisitions were primarily customer relationship intangible assets of $ 4.0 . The amount allocated to goodwill is reflective of the benefits the Company expects to realize from anticipated synergies and the acquired assembled workforce in place. A portion of the goodwill resulting from the acquisitions is deductible for tax purposes. From each acquisition date through September 30, 2023, the amount of revenue of the companies acquired during fiscal 2023 included in our Consolidated Statement of Operations for the year ended September 30, 2023, was $ 16.0 . Divestiture On January 12, 2024, the Company completed the sale of one of its fully owned subsidiaries, U.S. Lawns, for total cash consideration of $ 51.0 . The gain on the transaction of $ 43.6 is included in Gain on divestiture in the Consolidated Statements of Operations for the year ended September 30, 2024. The Maintenance Services operating segment includes the operations of the divested entity, and its results of operations are included in the Consolidated Statements of Operations through January 12, 2024. The company disposed of the U.S. Lawns customer relationships and trademarks as part of the divestiture.

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Sep. 30, 2024
Payables and Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	8. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consist of the following as of: September 30, 2024 September 30, 2023 Payroll related accruals $ 62.6 $ 52.2 Accrued operating expenses 115.5 77.7 Current portion of finance lease liabilities 37.0 21.5 Other accruals 22.6 28.8 Accrued expenses and other current liabilities $ 237.7 $ 180.2

Long-Term Debt

Long-Term Debt	12 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Long-Term Debt	9. Long-term Debt Long-term debt consists of the following: September 30, September 30, Series B term loan $ 732.8 $ 731.7 Receivables financing agreement 76.2 163.0 Financing costs, net ( 6.5 ) ( 6.6 ) Total debt, net $ 802.5 $ 888.1 Less: Current portion of long-term debt - - Long-term debt, net $ 802.5 $ 888.1 First Lien credit facility term loans and Series B Term Loan due 2029 In connection with the KKR Acquisition, the Company and a group of financial institutions entered into a credit agreement (the “Credit Agreement”) dated December 18, 2013 . The Credit Agreement consisted of seven-year $ 1,460.0 term loans (“First Lien Term Loans”) and a five-year $ 210.0 revolving credit facility. All amounts outstanding under the Credit Agreement were collateralized by substantially all of the assets of the Company. On April 22, 2022, the Company entered into Amendment No. 6 to the Credit Agreement (the “Amendment Agreement”), which amended the existing Credit Agreement to provide for: (i) a $ 1,200.0 seven-year term loan (the “Series B Term Loan”) and (ii) a $ 300.0 five-year revolving credit facility (the “Revolving Credit Facility”). The Series B Term Loan matures on April 22, 2029 and bears interest at a rate per annum of a secured overnight financing rate (“Term SOFR”), plus a margin of 3.25 % or a base rate (“ABR”) plus a margin of 2.25 %, subject to SOFR and ABR floors of 0.50 % and 1.50 %, respectively. The Company used the net proceeds from the Series B Term Loan to repay all amounts then outstanding under the Company’s Credit Agreement. As a result of the repayment of the amounts outstanding under the Company's Credit Agreement, the Company recorded a loss on debt extinguishment of $ 12.6 due to accelerated amortization of deferred financing fees and original issue discount included in the Other expense (income) line of the Consolidated Statements of Operations for the year ended September 30, 2022. An original issue discount of $ 12.0 was incurred when the Series B Term Loan was issued and is being amortized using the effective interest method over the life of the debt, resulting in an effective yield of 3.42 %. On August 28, 2023, the Company voluntarily repaid $ 450.0 of the amount outstanding under the Company’s Amendment Agreement. As a result of this voluntary repayment, the Company recorded a loss on debt extinguishment of $ 8.3 due to accelerated amortization of deferred financing fees and original issue discount as well as fees paid to lenders and third parties. The loss on debt extinguishment is included in the Other (income) expense line of the Consolidated Statements of Operations for the year ended September 30, 2023. On August 31, 2023, the Company entered into Amendment No. 7 to the Credit Agreement (the “Seventh Credit Agreement Amendment”). The Seventh Credit Agreement Amendment (i) amends the definition of “Permitted Holders” to include Birch Equity Holdings, LP, a Delaware limited partnership, Birch-OR Equity Holdings, LLC, a Delaware limited liability company and One Rock Capital Partners, LLC and (ii) provides for a 1.00 % prepayment premium for voluntary prepayments made in connection with repricing transactions or amendments made where the primary purpose of which is to decrease the effective yield, and which shall be applicable until six months after entering into the Seventh Credit Agreement Amendment. On May 28, 2024, the Company entered into Amendment No. 8 to the Credit Agreement (the "Eighth Credit Agreement Amendment"). Under the Eighth Credit Agreement Amendment, the existing Series B Term Loans were amended to bear interest at a rate per annum based on Term SOFR, plus a margin of 2.50 % or ABR plus a margin of 1.50 %, subject to SOFR and ABR floors of 0.50 % and 1.50 %, respectively. There were no debt repayments on the Series B Term Loan for the fiscal year ended September 30, 2024. Debt repayments for the Series B Term Loan totaled $ 459.0 for the fiscal year ended September 30, 2023. In addition to scheduled payments, the Company is obligated to pay a percentage of excess cash flow, as defined in the Credit Agreement, as payments to principal. The percentage varies with the ratio of the Company’s debt to its cash flow. The excess cash flow calculation did not result in any accelerated payment due for the periods ended September 30, 2024, September 30, 2023, and September 30, 2022. The Credit Agreement restricts the Company’s ability to, among other things, incur additional indebtedness, create liens, enter into mergers and acquisitions, dispose of assets and make distributions without the approval of the lenders. In certain circumstances, under the Credit Agreement, the Company is prohibited from making certain restricted payments, including dividends or distributions to its stockholders, subject to certain exceptions set forth in that agreement (including an exception for the making of such restricted payments up to an agreed limit, which limit is determined by a formula that takes into account consolidated net income, net cash proceeds and other amounts, in each case as described in greater detail in that agreement). The Credit Agreement imposes financial covenants upon the Company with respect to leverage and interest coverage under certain circumstances. The Credit Agreement contains provisions permitting the bank to accelerate the repayment of the outstanding debt under this agreement upon the occurrence of an Event of Default, as defined in the Credit Agreement, including a material adverse change in the financial condition of the Company since the date of the Credit Agreement. The weighted average interest rate on the Series B Term Loan was 8.2 % and 7.8 % for the years ended September 30, 2024 and September 30, 2023, respectively. The Series B Term Loan has required amortization debt repayments that are due in quarterly installments of 0.25 % of the original principal balance of the Series B Term Loans. As a result of the August 28, 2023 voluntary repayment of the amount outstanding under the Amendment Agreement, the quarterly installment payments of the remaining amount outstanding under the Series B Term Loan are no longer required. Revolving credit facility The Company has a five-year $ 300 revolving credit facility (the “Revolving Credit Facility”) that matures on April 22, 2027 and bears interest at a rate per annum of Term SOFR plus a margin ranging from 2.00 % to 2.50 %, or ABR plus a margin ranging from 1.00 to 1.50 %, subject to SOFR and ABR floors of 0.00 % and 1.00 %, respectively, with the margin on the Revolving Credit Facility determined based on the Company’s first lien net leverage ratio. The Revolving Credit Facility replaced the previous $ 260.0 revolving credit facility under the Credit Agreement. The Company had no outstanding balance under the Revolving Credit Facility as of September 30, 2024 and September 30, 2023 . There were no borrowings or repayments under the facility during the year ended September 30, 2024. There were $ 33.5 borrowings under the facility during the year ended September 30, 2023, of which, $ 33.5 were repaid during the same period. Th e Company had no letters of credits issued and outstanding as of September 30, 2024 and had $ 42.6 of letters of credits issued and outstanding as of September 30, 2023 . The weighted average interest rate on the Revolving Credit Facility was 6.9 % for the year ended September 30, 2023. Receivables financing agreement On April 28, 2017, the Company, through a wholly-owned subsidiary, entered into a receivables financing agreement (the “Receivables Financing Agreement”). On August 31, 2023, the Company, entered into the Fourth Amendment to the Receivables Financing Agreement (the “Fourth Amendment”), which amends the definition of “Permitted Holders” to align with the definition of “Permitted Holders” under the Credit Agreement Amendment as defined above, as of the date of the closing of the Receivables Financing Amendment. On June 27, 2024, the Company, through a wholly-owned subsidiary, entered into the Fifth Amendment to the Receivables Financing Agreement (the "Fifth Amendment"), which increased the borrowing capacity to $ 325.0 and extended the term through June 27, 2027. All amounts outstanding under the Receivables Financing Agreement are collateralized by substantially all of the accounts receivable and unbilled revenue of the Company. During the year ended September 30, 2024, the Company borrowed $ 0.5 against the capacity and voluntarily repaid $ 87.3 . During the year ended September 30, 2023, the Company borrowed $ 549.5 against the capacity and voluntarily repaid $ 554.5 . The interest rate on the amounts borrowed under the Receivables Financing Agreement is established for periods of up to six months at 140 - 170 bps over SOFR depending on the Company’s leverage ratio, and a commitment fee equal to 0.4 % of the unused balance of the facility. The weighted average interest rate on the amounts borrowed under the Receivables Financing Agreement was 6.7 % and 6.3 % for the years ended September 30, 2024 and September 30, 2023, respectively. The following are the scheduled maturities of long-term debt for the next five fiscal years and thereafter, which do not include any estimated excess cash flow payments: 2025 $ — 2026 — 2027 76.2 2028 — 2029 and thereafter 738.0 Total long-term debt 814.2 Less: Current maturities — Less: Original issue discount 5.2 Less: Financing costs 6.5 Total long-term debt, net $ 802.5 The Company has estimated the fair value of its long-term debt to be approximately $ 812.4 and $ 900.1 as of September 30, 2024 and September 30, 2023 , respectively. Fair value is based on market bid prices around period-end (Level 2 inputs).

Fair Value Measurements and Der

Fair Value Measurements and Derivative Instruments	12 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements and Derivative Instruments	10. Fair Value Measurements and Derivative Instruments Fair value is defined as the price at which an orderly transaction to sell an asset or to transfer a liability would take place between market participants at the measurement date under current market conditions (that is, an exit price at the measurement date from the perspective of a market participant that holds the asset or owes the liability). Fair Value Hierarchy The following hierarchy for inputs used in measuring fair value should maximize the use of observable inputs and minimize the use of unobservable inputs by requiring that the most observable inputs be used when available: Level 1 Quoted prices in active markets for identical assets or liabilities that are accessible at the measurement dates. Level 2 Significant observable inputs that are used by market participants in pricing the asset or liability based on market data obtained from independent sources. Level 3 Significant unobservable inputs the Company believes market participants would use in pricing the asset or liability based on the best information available. The carrying amounts shown for the Company’s cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximate fair value due to the short-term maturity of those instruments. The valuation is based on settlements of similar financial instruments all of which are short-term in nature and are generally settled at or near cost. Investments held in Rabbi Trust A non-qualified deferred compensation plan is available to certain executives. Under this plan, participants may elect to defer up to 70 % of their compensation. The Company invests the deferrals in participant-selected diversified investments that are held in a Rabbi Trust and which are classified within Other assets on the Consolidated Balance Sheets. The fair value of the investments held in the Rabbi Trust is based on the quoted market prices of the underlying mutual fund investments. These investments are based on the participants’ selected investments, which represent the underlying liabilities to the participants in the non-qualified deferred compensation plan. Gains and losses on these investments are included in Other (income) expense on the Consolidated Statements of Operations. Derivatives The Company’s objective in entering into derivative transactions is to manage its exposure to interest rate movements associated with its variable rate debt and changes in fuel prices. The Company recognizes derivatives as either assets or liabilities on the Consolidated Balance Sheets and measures those instruments at fair value. The fair values of the derivative financial instruments are determined using widely accepted valuation techniques including discounted cash flow analysis based on the expected cash flows of each derivative. Although the Company has determined that the significant inputs, such as interest yield curve and discount rate, used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with the Company’s counterparties and its own credit risk utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of September 30, 2024 and September 30, 2023, the Company assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and determined that the credit valuation adjustments were not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. The following tables summarize the financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2024 and September 30, 2023: September 30, 2024 Carrying Value Level 1 Level 2 Level 3 Other assets: Investments held by Rabbi Trust $ 9.7 $ 9.7 $ — $ — Total assets $ 9.7 $ 9.7 $ — $ — Accrued expenses and other current liabilities: Fuel derivative contracts $ ( 0.5 ) $ — $ ( 0.5 ) $ — Other liabilities: Interest rate derivative contracts ( 2.5 ) — ( 2.5 ) — Obligation to Rabbi Trust ( 9.7 ) ( 9.7 ) — — Total liabilities $ ( 12.7 ) $ ( 9.7 ) $ ( 3.0 ) $ — September 30, 2023 Carrying Value Level 1 Level 2 Level 3 Other assets: Investments held by Rabbi Trust $ 10.9 $ 10.9 $ — $ — Interest rate derivative contracts 21.3 — 21.3 — Total Assets $ 32.2 $ 10.9 $ 21.3 $ — Other liabilities: Obligation to Rabbi Trust $ 10.9 $ 10.9 $ — $ — Total Liabilities $ 10.9 $ 10.9 $ — $ — Hedging Activities As of September 30, 2024 and September 30, 2023, the Company’s outstanding derivatives qualified as cash flow hedges. The Company assesses whether derivatives used in hedging transactions are highly effective in offsetting changes in the cash flow of the hedged forecasted transactions. Regression analysis is used for the hedge relationships and high effectiveness is achieved when a statistically valid relationship reflects a high degree of offset and correlation between the fair values of the derivative and the hedged forecasted transaction. The entire change in the fair value for highly effective derivatives is reported in Other comprehensive (loss) income and subsequently reclassified into Interest expense, net (in the case of interest rate contracts) or Cost of services provided (in the case of fuel hedge contracts) in the Consolidated Statements of Operations when the hedged item affects earnings. If the hedged forecasted transaction is no longer probable of occurring, then the amount recognized in Accumulated other comprehensive (loss) income is released to earnings. Cash flows from the derivatives are classified in the same category as the cash flows from the underlying hedged transaction. Interest Rate Contracts The Company has exposures to variability in interest rates associated with its variable interest rate debt, which includes the Series B Term Loan. As such, the Company has entered into interest rate contracts to help manage interest rate exposure by economically converting a portion of its variable-rate debt to fixed-rate debt. Effective for the periods March 18, 2016 through December 31, 2022, the Company held interest rate swaps with a notional amount of $ 500.0 . In January 2023, the Company entered into an interest rate swap agreement with a notional amount of $ 500.0 and an interest rate collar agreement with a notional amount of $ 500.0 , each effective for the period January 31, 2023 through January 31, 2028. On August 28, 2023 the Company terminated $ 400.0 of the notional amount of its outstanding interest rate collar agreement. The Company accelerated the reclassification of a gain of $ 5.2 in other comprehensive income to earnings as a result of the hedged forecasted transactions becoming probable not to occur. The notional amount of interest rate contracts were $ 600.0 at September 30, 2024 and September 30, 2023, respectively. The net deferred gain on the interest rate swaps as of September 30, 2024 of $ 1.8 , net of taxes, is expected to be recognized in Interest expense over the next 12 months. The effects on the consolidated financial statements of the interest rate contracts which were designated as cash flow hedges were as follows: Fiscal Year Ended 2024 2023 2022 (Loss) income recognized in Other comprehensive (loss) income $ ( 13.3 ) $ 36.1 $ 6.1 Net gain (loss) reclassified from Accumulated other 11.1 15.2 ( 0.5 ) Fuel Swap Contracts The Company has exposures to variability in fuel pricing associated with its purchase and usage of fuel during the ordinary course of business operating a large fleet of vehicles and equipment. As such, the Company has entered into gasoline hedge contracts to help reduce its exposure to volatility in the fuel markets. In March 2024, the Company entered into a fuel swap agreement with a notional volume of 4.0 million gallons covering the period March 4, 2024 through February 24, 2025. The net deferred loss on the fuel swap as of September 30, 2024 was immaterial and is expected to be recognized in Cost of services provided over the next 6 months. The effects on the consolidated financial statements of the fuel swap contracts which were designated as cash flow hedges were as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 (Loss) income recognized in Other comprehensive (loss) income $ ( 0.5 ) $ — $ 0.2 Net gain reclassified from Accumulated other comprehensive (loss) income into Cost of services provided — — 1.5

Income Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The components of income tax expense (benefit) are as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Current: Federal $ 23.1 $ 22.7 $ 7.5 State 5.3 3.4 4.7 Deferred: Federal ( 0.8 ) ( 22.4 ) ( 3.7 ) State 1.3 ( 4.2 ) ( 2.9 ) Valuation allowance 1.2 5.1 — Total income tax (benefit) expense $ 30.1 $ 4.6 $ 5.6 Income tax expense (benefit) differs from the amount computed at the federal statutory corporate tax rate as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Federal tax at statutory rate $ 20.3 $ ( 0.7 ) $ 4.1 State tax, net of federal tax (benefit) expense 4.8 ( 0.8 ) 1.2 Tax effect of: Equity-based compensation 0.9 0.9 0.6 Non-deductible officers’ compensation 1.3 1.1 0.7 Provision to return and deferred tax adjustments 0.3 ( 0.8 ) ( 0.3 ) Non-deductible promotional and entertainment expense 0.9 0.6 0.4 Fuel tax credit and other credits ( 0.6 ) ( 0.7 ) ( 0.8 ) Carryback claim, net of adjustments — ( 0.8 ) ( 0.3 ) Divestiture - Non-deductible goodwill 1.2 — — Rate changes 0.2 0.5 — Valuation allowance 1.2 5.1 — Other, net ( 0.4 ) 0.2 — Income tax expense $ 30.1 $ 4.6 $ 5.6 The components of the Company’s net deferred tax asset and liability accounts resulting from temporary differences between the tax and financial reporting basis of assets and liabilities are as follows: September 30, 2024 September 30, 2023 Deferred tax assets: Self-insurance reserves $ 37.3 $ 31.8 Deferred compensation 2.2 2.8 Payroll related accruals 25.3 22.8 Allowance for doubtful accounts 2.5 1.3 Lease liabilities 22.3 23.6 Net operating loss carryforward 4.9 7.1 Business interest expense 17.2 10.4 Other non-current deferred tax assets 1.2 4.5 Total non-current deferred tax assets 112.9 104.3 Valuation allowance ( 6.3 ) ( 5.1 ) Total deferred tax assets $ 106.6 $ 99.2 Deferred tax liabilities: Intangible assets $ 47.1 $ 46.2 Property and equipment 63.2 57.3 Deferred revenue 16.6 15.0 Prepaid assets 0.1 0.2 Lease assets 20.7 22.0 Other non-current deferred tax liabilities 1.5 6.0 Total non-current deferred tax liabilities 149.2 146.7 Total net deferred tax liabilities $ 42.6 $ 47.5 Classification on balance sheets: Other assets $ 1.3 $ 3.6 Deferred tax liabilities 43.9 51.1 The CARES Act In March 2020, the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) was signed into law and included various provisions to provide additional economic relief to address the impact of the COVID-19 pandemic. Notable provisions included net operating loss carrybacks, adjustments to the interest expense limitations under the U.S Tax Code Section 163(j), increase in the charitable contributions limitation, payroll tax deferrals of the employer portion of social security tax, a portion of which was repaid during the year ended September 30, 2022 and the remainder of which was repaid in fiscal year 2023, and an employee retention credit for wages paid to an idle employee under certain circumstances resulting from the COVID-19 pandemic. The Company recorded a tax receivable of $ 39.0 and a benefit of $ 10.1 to the tax provision for the tax net operating losses incurred in 2021 from the enactment of the CARES Act, net of adjustments. The tax net operating losses have been carried back to prior years. The Company has received all but $ 8.4 of the benefit from the carryback claims as of September 30, 2024. Further, the Company previously elected to defer the employer portion of social security taxes through 2020 and has filed for the employee retention credit allowed for under the CARES Act. The Company recorded a tax credit of $ 3.3 related to the employee retention credit during the year ended September 30, 2022 and has received all but $ 1.0 as of September 30, 2024. Net Operating Losses and Interest Expense Carryforwards The Company has state income tax net operating losses ("NOLs") of $ 90.9 M having varying expirations from fiscal year 2025 through an indefinite useful life. The Company has a federal interest expense carryforward of $ 58.4 M and state interest expense carryforwards of $ 94.6 M that can be carried forward indefinitely. The Company believes it is more likely than not it will be unable to utilize some of its separate state NOLs and separate state interest expense carryforwards to offset future income. The increase to the valuation allowance was $ 1.2 million in FY2024. At September 30, 2024, $ 6.3 million of the valuation allowances presented above relate to separate state NOLs and interest expense carryforwards that are not expected to be realized. We evaluate the realization of deferred tax assets by considering such factors as the reversal of existing taxable temporary differences, expected profitability by tax jurisdiction and available carryforward periods. The extent and timing of any such reversals will influence the extent of tax benefits recognized in a particular year. Should applicable losses, credits, and deductions ultimately be realized, the resulting reduction in the valuation allowance would generally be recognized as an income tax benefit. Uncertain Income Tax Positions As of September 30, 2024 and 2023, the Company had no unrecognized tax benefits that, if recognized, would impact the Company's effective tax rate. The total amount of unrecognized tax benefits could change within the next twelve months for a number of reasons including audit settlements, tax examination activities and the recognition and measurement considerations under this guidance. The Company files income tax returns in the U.S. federal jurisdiction and various state and local jurisdictions, as well as Canada. The Company’s returns are no longer subject to U.S. federal and state tax examination for fiscal years before 2020 and 2019 , respectively.

Leases

Leases	12 Months Ended
	Sep. 30, 2024
Leases [Abstract]
Leases	12. Leases The Company determines if an arrangement is a lease at the inception of the agreement. The Company determines an arrangement is a lease if it conveys the right to control the use of the asset for a period of time in exchange for consideration. The Company has operating and finance leases for branch and administrative offices, vehicles, certain machinery and equipment, and furniture. The Company’s leases have remaining lease terms from one month up to 9.4 years with one or more exercisable renewal periods and specified increases in lease payments upon exercise of the renewal options. For purposes of calculating lease liabilities, lease terms include options to extend the lease only when it is reasonably certain that the Company will exercise those options. Some leasing arrangements require variable payments that are dependent on usage, output, or may vary for other reasons, such as insurance, common area maintenance, and tax payments. The variable lease payments are not presented as part of the initial right-of-use asset or lease liability. The Company's lease agreements do not contain any material restrictive covenants or residual value guarantees. The following table summarizes the lease-related assets and liabilities recorded in the Consolidated Balance Sheets at September 30, 2024 and 2023: Fiscal Year Ended September 30, 2024 September 30, 2023 Operating leases: Right-of-use asset $ 81.3 $ 86.1 Current portion of lease liabilities 24.9 27.3 Lease liabilities 62.6 65.1 Total operating lease liabilities $ 87.5 $ 92.4 Finance leases: Right-of-use asset (1) $ 67.7 $ 41.3 Current portion of lease liabilities (2) 37.0 21.5 Lease liabilities (3) 31.2 21.3 Total finance lease liabilities $ 68.2 $ 42.8 (1) Included in “Property and equipment, net” in the Consolidated Balance Sheets. (2) Included in “Accrued expenses and other liabilities” in the Consolidated Balance Sheets. (3) Included in “Other liabilities” in the Consolidated Balance Sheets. As most of the Company’s leases do not specifically state an implicit rate, the Company uses an incremental borrowing rate consistent with the lease term as of the lease commencement date when calculating the present value of remaining lease payments. The incremental borrowing rate reflects the cost to borrow on a securitized basis. The remaining lease term does not reflect all renewal options available to the Company, only those renewal options that the Company has assessed as reasonably certain. The weighted-average remaining lease terms and incremental borrowing rates as of September 30, 2024 and 2023 were as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 Operating leases: Weighted-average remaining lease term (years) 4.4 4.7 Weighted-average incremental borrowing rate 4.9 % 4.0 % Finance leases: Weighted-average remaining lease term (years) 2.4 2.4 Weighted-average incremental borrowing rate 5.9 % 3.8 % The components of lease cost for operating and finance leases for the fiscal year ended September 30, 2024 and 2023 were as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 Operating lease cost $ 31.5 $ 32.1 Finance lease cost: Amortization of right-of-use asset 34.7 27.0 Interest on lease liabilities 3.2 1.6 Total finance lease cost 37.9 28.6 Short-term lease cost 22.1 23.7 Variable lease costs not included in lease liability 3.8 3.3 Sublease income ( 0.7 ) ( 0.7 ) Total lease cost $ 94.6 $ 87.0 Supplemental cash flow information for the fiscal year ended September 30, 2024 and 2023 were as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 27.7 $ 28.9 Operating cash flows from finance leases 3.2 1.6 Financing cash flows from finance leases 36.3 27.6 Non-cash items: Right-of-use Assets Obtained In Exchange For New Operating Liabilities 27.1 33.4 Right-of-use Assets Obtained In Exchange For New Finance Liabilities 65.4 26.3 As of September 30, 2024, the Company does not have material operating or financing leases that have not yet commenced. Maturities of operating and finance lease liabilities as of September 30, 2024 were as follows: Fiscal Year Operating Lease Finance Lease 2025 $ 28.5 $ 40.0 2026 23.4 21.3 2027 16.7 7.1 2028 11.5 3.2 2029 7.2 1.3 Thereafter 10.7 0.2 Total net lease payments 98.0 73.1 Less: Amounts representing interest ( 10.5 ) ( 4.9 ) Total lease liabilities 87.5 68.2 Less: Current portion of lease liabilities ( 24.9 ) ( 37.0 ) Non-current lease liabilities $ 62.6 $ 31.2

Equity-Based Compensation

Equity-Based Compensation	12 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Equity-Based Compensation	13. Equity-Based Compensation Amended and Restated 2018 Omnibus Incentive Plan On June 28, 2018 (and as amended and restated on March 10, 2020 and amended on March 5, 2024), in connection with the IPO, the Company’s Board of Directors adopted, and its stockholders approved, the BrightView Holdings, Inc. 2018 Omnibus Incentive Plan (the “2018 Omnibus Incentive Plan”). The total number of shares of common stock that may be issued under the 2018 Omnibus Incentive Plan is 24,650,000 . Under 2018 Omnibus Incentive Plan, the Company may grant stock options, stock appreciation rights, restricted stock, other equity-based awards and other cash-based awards to employees, directors, officers, consultants and advisors. 2023 Employment Inducement Incentive Award Plan On September 11, 2023, the Company adopted the BrightView Holdings, Inc. 2023 Employment Inducement Incentive Award Plan (the “Inducement Plan”). Pursuant to the Inducement Plan, the Company may grant equity incentive compensation as a material inducement for certain individuals to commence employment with the Company. A total of 1,750,000 shares of common stock are reserved for grant under the Inducement Plan. Awards granted under the Inducement Plan may be in the form of non-qualified stock options, stock appreciation rights, restricted stock awards, restricted stock units, unrestricted stock awards, dividend equivalent rights and other equity-based awards, or any combination of those awards. Restricted Stock Awards A summary of the Company’s restricted stock award activity for the year ended September 30, 2024 is presented in the following table: Shares Weighted-Avg Distribution Price per Share Outstanding at September 30, 2023 213,000 $ 14.66 Less: Forfeited 106,000 $ 14.66 Outstanding at September 30, 2024 107,000 $ 14.66 Restricted Stock Units A summary of the Company’s restricted stock unit activity for the year ended September 30, 2024 is presented in the following table: Shares Weighted-Avg Distribution Price per Share Outstanding at September 30, 2023 3,021,000 $ 9.32 Granted 2,667,000 $ 8.24 Less: Vested 1,285,000 $ 9.67 Less: Forfeited 689,000 $ 8.92 Outstanding at September 30, 2024 3,714,000 $ 8.50 During the year ended September 30, 2024 , the Company issued 2,667,000 restricted stock units (“RSUs”) at a weighted average grant date fair value of $ 8.24 per share, all of which are subject to vesting. The majority of these units vest ratably over a four-year period commencing on the grant date. Non-cash equity-based compensation expense associated with the new grants will total approximately $ 19.2 over the requisite service period. During the year ended September 30, 2024, 1,285,000 RSUs vested and 689,000 RSUs were forfeited. Stock Option Awards A summary of the Company’s stock option activity for the year ended September 30, 2024 is presented in the following table: Shares Weighted-Avg Exercise Price per Share Outstanding at September 30, 2023 4,449,000 $ 19.06 Less: Exercised 166,000 $ 13.84 Less: Forfeited 1,247,000 $ 19.00 Outstanding at September 30, 2024 3,036,000 $ 19.37 Vested and exercisable at September 30, 2024 2,527,000 $ 19.33 Expected to vest after September 30, 2024 509,000 $ 19.54 Performance Stock Unit Awards A summary of the Company’s performance stock unit activity for the year ended September 30, 2024 is presented in the following table: Shares Weighted-Avg Distribution Price per Share Outstanding at September 30, 2023 512,000 $ 7.48 Granted 918,000 $ 7.35 Less: Forfeited 316,000 $ 7.40 Outstanding at September 30, 2024 1,114,000 $ 7.40 During the year ended September 30, 2024, the Company issued 918,000 performance stock units (“PSUs”) at a weighted average distribution price of $ 7.35 per share and a weighted average grant date fair value of $ 7.35 per share, which cliff vest at the end of the three-year service period. The number of the PSUs that vest upon completion of the performance period can range from 0 % to 200 % of the original grant, subject to certain limitations, contingent upon performance conditions. The performance condition metrics are the Company’s three-year average Adjusted EBITDA margin and compound annual growth rate of the Company’s land organic revenue. The fair value of these awards is determined based on the trading price of the company’s common shares on the date of grant. Non-cash equity-bas ed compensation expense associated with the grant is expected to be approximately $ 6.3 over the requisite service period, dependent on the achievement of the identified performance conditions.. During the year ended September 30, 2024 , no PSUs vested and 316,000 PSUs were forfeited. Valuation Assumptions The fair value of each restricted stock award, RSU, or PSU granted under the 2018 Omnibus Incentive Plan was estimated on the date of grant in accordance with the fair value provisions in ASC 718. The fair values of the RSU awards granted during the periods presented were determined based on the trading price of the company’s common shares on the date of grant. The fair value of the stock option awards granted were estimated on the date of grant using the Black-Scholes-Merton option-pricing model. The Company chose the Black-Scholes-Merton model based on its experience with the model and the determination that the model could be used to provide a reasonable estimate of the fair value of awards with terms such as those discussed above. For PSU awards subject to a market condition, the metric is the Company’s total shareholder return during the performance period relative to a pre-defined set of industry peer companies. The fair value of these awards is estimated using a Monte Carlo simulation. For PSU awards subject to a performance condition, the fair value is determined based on the trading price of the company’s common shares on the date of grant. There were no new PSU awards subject to a market condition or stock option awards granted for the years ended September 30, 2024 and September 30, 2023 . The weighted-average assumptions used in the valuation of PSU awards subject to a market condition and stock option awards granted for the year ended September 30, 2022 are presented in the table below: Fiscal Year Ended September 30, 2022 Assumptions: Risk-free interest rate 1.88 % Dividend yield — Volatility factor 47.10 % Expected term (in years) 5.3 • Risk-free interest rate – The risk-free rate for PSU awards subject to a market condition and stock option awards granted during the periods presented above was determined by using the U.S. Treasury constant maturity rate as of the valuation date commensurate with the expected term. • Expected dividend yield – No routine common stock dividends are currently being paid by 2018 Omnibus Incentive Plan, or are expected to be paid in future periods. • Expected volatility – The expected volatility is based upon an analysis of the historical and implied volatility of the guideline companies and adjusting the volatility to take into account the differences in leverage between the Company and the guideline companies. • Expected term – The expected term represents the expected time to a liquidity event or re-capitalization. The Company estimated the expected life by considering historical exercise and termination behavior of employees and the vesting conditions of the RSUs, PSUs and stock option awards granted under 2018 Omnibus Incentive Plan. Equity-Based Compensation Expense The Company recognizes equity-based compensation expense using the estimated fair value as of the grant date over the requisite service or performance period applicable to the grant. Estimates of future forfeitures are made at the date of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Company recognized $ 20.2 , $ 22.1 and $ 18.9 in equity-based compensation expense for the years ended September 30, 2024, September 30, 2023 and September 30, 2022, respectively, included in Selling, general and administrative expense in the accompanying Consolidated Statements of Operations. The resulting charges increased Additional paid in capital by the same amount. Total unrecognized compensation cost was $ 30.6 , $ 23.7 and $ 36.2 as of September 30, 2024, September 30, 2023 and September 30, 2022 , respectively, which is expected to be recognized over a weighted average period of 1.2 years. 2018 Employee Stock Purchase Plan The Company’s Stockholders have approved the Company’s 2018 Employee Stock Purchase Plan, (the “ESPP”). A total of 2,100,000 shares of the Company’s common stock were made available for sale under the Company’s 2018 Employee Stock Purchase Plan on October 22, 2018, of which 188,000 , 177,000 , and 112,000 were issued on November 17, 2023, November 14, 2022, and November 15, 2021, respectively. An additional portion thereof is expected to be issued in November 2024.

Commitment and Contingencies

Commitment and Contingencies	12 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	14. Commitments and Contingencies Risk Management The Company carries general liability, auto liability, workers’ compensation, and employee health care insurance policies. In addition, the Company carries other reasonable and customary insurance policies for a Company of our size and scope, as well as umbrella liability insurance policies to cover claims over the liability limits contained in the primary policies. The Company’s insurance programs for workers’ compensation, general liability, auto liability and employee healthcare for certain employees contain self-insured retention amounts, deductibles and other coverage limits (“self-insured liability”). Claims that are not self-insured as well as claims in excess of the self-insured liability amounts are insured. The Company uses estimates in the determination of the required reserves. These estimates are based upon calculations performed by third-party actuaries, as well as examination of historical trends, and industry claims experience. The Company’s reserve for unpaid and incurred but not reported claims under these programs at September 30, 2024 was $ 165.6 , of which $ 52.8 was classified in current liabilities and $ 112.8 was classified in non-current liabilities in the accompanying Consolidated Balance Sheets. The Company’s reserve for unpaid and incurred but not reported claims under these programs at September 30, 2023 was $ 159.9 , of which $ 54.8 was classified in current liabilities and $ 105.1 was classified in non-current liabilities in the accompanying Consolidated Balance Sheets. While the ultimate amount of these claims is dependent on future developments, in management’s opinion, recorded reserves are adequate to cover these claims. The Company’s reserve for unpaid and incurred but not reported claims at September 30, 2024 includes $ 13.4 related to claims recoverable from third-party insurance carriers. Corresponding assets of $ 4.0 and $ 9.4 are recorded at September 30, 2024, as Other current assets and Other assets, respectively. The Company’s reserve for unpaid and incurred but not reported claims at September 30, 2023 includes $ 18.1 related to claims recoverable from third party insurance carriers. Corresponding assets of $ 5.3 and $ 12.8 were recorded at September 30, 2023, as Other current assets and Other assets, respectively. Litigation Contingency From time to time, the Company is subject to legal proceedings and claims in the ordinary course of its business, principally claims made alleging injuries (including vehicle and general liability matters as well as workers’ compensation and property casualty claims). Such claims, even if lacking merit, can result in expenditures of significant financial and managerial resources. In the ordinary course of its business, the Company is also subject to claims involving current and/or former employees and disputes involving commercial and regulatory matters. Regulatory matters include, among other things, audits and reviews of local and federal tax compliance, safety and employment practices. Although the process of resolving regulatory matters and claims through litigation and other means is inherently uncertain, the Company is not aware of any such matter, legal proceeding or claim that it believes will have, individually or in the aggregate, a material effect on the Company, its financial condition, and results of operations or cash flows. For all legal matters, an estimated liability is established in accordance with the loss contingencies accounting guidance. This estimated liability is included in Accrued expenses and other current liabilities in the accompanying Consolidated Balance Sheets.

Segments

Segments	12 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Segments	15. Segments The operations of the Company are conducted through two operating segments, Maintenance Services and Development Services, which are also its reportable segments. Maintenance Services primarily consists of recurring landscape maintenance services and snow removal services as well as supplemental landscape enhancement services. Development Services primarily consists of landscape architecture and development services for new construction and large scale redesign projects. The operating segments identified above are determined based on the services provided, and they reflect the manner in which operating results are regularly reviewed by the Chief Operating Decision Maker (“CODM”) to allocate resources and assess performance. The CODM is the Company’s Chief Executive Officer. The CODM evaluates the performance of the Company’s operating segments based upon Net Service Revenues, Adjusted EBITDA and Capital Expenditures. Management uses Adjusted EBITDA to evaluate performance and profitability of each operating segment. The accounting policies of the segments are the same as those described in Note 2 “Summary of Significant Accounting Policies" Corporate includes corporate executive compensation, finance, legal and information technology which are not allocated to the segments. Eliminations represent eliminations of intersegment revenues. The Company does not currently provide asset information by segment, as this information is not used by management when allocating resources or evaluating performance. The following is a summary of certain financial data for each of the segments: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Maintenance Services $ 1,964.0 $ 2,066.5 $ 2,082.0 Development Services 808.8 758.0 698.8 Eliminations ( 5.7 ) ( 8.5 ) ( 6.2 ) Net Service Revenues $ 2,767.1 $ 2,816.0 $ 2,774.6 Maintenance Services $ 279.7 $ 277.9 $ 278.8 Development Services 106.3 82.8 73.7 Corporate ( 61.3 ) ( 62.0 ) ( 64.6 ) Adjusted EBITDA (1) $ 324.7 $ 298.7 $ 287.9 Maintenance Services $ 61.3 $ 56.1 $ 82.9 Development Services 12.8 8.2 12.5 Corporate 4.3 7.0 11.9 Capital Expenditures $ 78.4 $ 71.3 $ 107.3 (1) Presented below is a reconciliation of Net (loss) income to Adjusted EBITDA: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Net income (loss) $ 66.4 $ ( 7.7 ) $ 14.0 Interest expense, net 62.4 97.4 53.3 Income tax expense 30.1 4.6 5.6 Depreciation expense 108.4 105.2 98.9 Amortization expense 35.8 44.5 51.5 Business transformation and integration costs (a) 44.1 23.7 21.5 Gain on divestiture (b) ( 43.6 ) — 0.1 Equity-based compensation (c) 20.5 22.3 19.0 COVID-19 related expenses (d) — 0.4 11.4 Debt extinguishment (e) 0.6 8.3 12.6 Adjusted EBITDA $ 324.7 $ 298.7 $ 287.9 (a) Business transformation and integration costs consist of (i) severance and related costs; (ii) business integration costs and (iii) information technology infrastructure, transformation and other costs. Fiscal Year Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2022 Severance and related costs (f) $ 16.6 $ 8.9 $ 1.6 Business integration (g) ( 0.4 ) 6.2 8.2 IT infrastructure, transformation, and other (h) 27.9 8.6 11.7 Business transformation and integration costs $ 44.1 $ 23.7 $ 21.5 (b) Represents the realized gain on sale and transaction related expenses from the divestiture of U.S. Lawns on January 12, 2024. (c) Represents equity-based compensation expense and related taxes recognized for equity incentive plans outstanding . (d) Represents expenses related to the Company’s response to the COVID-19 pandemic, principally temporary and incremental salary and related expenses, personal protective equipment, cleaning and supply purchases, and other. Additionally, fiscal year 2022 includes refunds related to employee retention credits allowed under the CARES Act. (e) Represents losses on the extinguishment of debt related to Amendments No. 6, No. 7, and No. 8 to the Credit Agreement, in the fiscal years ended September 30, 2022, 2023, and 2024 respectively, and includes accelerated amortization of deferred financing fees and original issue discount as well as fees paid to lenders and third parties. (f) Represents severance and related costs incurred in connection with the Company's One BrightView initiative and CEO transition. (g) Represents isolated expenses specifically related to the integration of acquired companies such as one-time employee retention costs, employee onboarding and training costs, fleet and uniform rebranding costs, and adjustments to performance based contingent consideration. The Company excludes Business integration costs from the non-GAAP measures disclosed above since such expenses vary in amount due to the number of acquisitions and size of acquired companies as well as factors specific to each acquisition, and as a result lack predictability as to occurrence and/or timing, and create a lack of comparability between periods. (h) Represents expenses related to distinct initiatives, typically significant enterprise-wide changes. Such expenses are excluded from the measures disclosed above since such expenses vary in amount based on occurrence as well as factors specific to each of the activities, are outside of the normal operations of the business, and create a lack of comparability between periods.

Mezzanine Equity

Mezzanine Equity	12 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Mezzanine Equity	16. Mezzanine Equity Series A Convertible Preferred Stock On August 28, 2023 (the “Original Issuance Date”), BrightView Holdings, Inc. entered into an Investment Agreement with each of Birch Equity Holdings, LP, a Delaware limited partnership, and Birch-OR Equity Holdings, LLC, a Delaware limited liability company (collectively, the “Investors”), pursuant to which the Company issued and sold, in a private placement, an aggregate of 500,000 shares of the Company’s Series A Convertible Preferred Stock, par value $ 0.01 per share (the “Series A Preferred Stock”), for an aggregate purchase price of $ 500.0 (the “Issuance”), excluding issuance costs. The Series A Preferred Stock was recorded at that amount, net of issuance costs of $ 5.0 , in the Company’s Consolidated Balance Sheets and statement of changes in stockholders’ equity and mezzanine equity. Mezzanine Classification The Series A Preferred Stock is redeemable in the event of certain change of control events involving the Company. S99-3A(2) of the SEC’s Accounting Series Release No. 268 (“ASR 268”) requires preferred securities that are redeemable for cash or other assets to be classified outside of permanent equity if they are redeemable (i) at a fixed or determinable price on a fixed or determinable date, (ii) at the option of the holder, or (iii) upon the occurrence of an event that is not solely within the control of the issuer. Preferred securities that are mandatorily redeemable are required to be classified by the issuer as liabilities whereas under ASR 268 guidance an issuer should classify a preferred security whose redemption is contingent on an event not entirely in control of the issuer as mezzanine equity. The Series A Preferred Stock is not mandatorily redeemable, however, a change in control is not solely in control of the Company, accordingly, the Company determined that mezzanine treatment is appropriate for the Series A and has presented it as such in our Consolidated Balance Sheets and statement of changes in stockholders’ equity and mezzanine equity, as of and for the year ended September 30, 2024. Liquidation Preference The Series A Preferred Stock will rank senior to the Company’s common stock, par value $ 0.01 per share (the “Common Stock”), with respect to dividend rights and rights on the distribution of assets on any voluntary or involuntary liquidation, dissolution or winding up of the affairs of the Company. The aggregate liquidation preference of the Series A Preferred Stock was $ 512.0 and $ 503.2 as of September 30, 2024 and September 30, 2023, respectively. Dividends Holders of the Series A Preferred Stock are entitled to a dividend at the rate of 7.0 % per annum, compounding quarterly, paid in kind or paid in cash, at the Company’s election. Dividends paid in kind are measured at fair value. For any quarter in which the Company elects not to pay the dividend in cash, such dividend will become part of the liquidation preference of each such share of Series A Preferred Stock as of the applicable dividend payment date. Shares of the Series A Preferred Stock also entitle the holder to participate in any dividends paid on the Common Stock on an as-converted basis. During the year ended September 30, 2024, the Company paid in-kind dividends of $ 8.9 in the aggregate on the Series A Preferred Stock which increased the aggregate liquidation preference of the Series A Preferred Stock by the same amount. In addition, the Company declared cash dividends of $ 26.8 during the year ended September 30, 2024, of which $ 17.8 was paid. Accrued dividends of $ 9.0 are presented within Accrued expense and other current liabilities on the Consolidated Balance Sheets as of September 30, 2024 . There were no dividends issued to common stockholders during the years ended September 30, 2024 and 2023. Voting The Series A Preferred Stock will be entitled to vote with the holders of the Common Stock on an as-converted basis (subject to the conversion limitations set forth in the Certificate of Designations of the Series A Preferred Stock (the “Certificate of Designations”)). Holders of the Series A Preferred Stock will be entitled to a separate class vote with respect to, among other things, amendments to the Company’s organizational documents that have an adverse effect on the Series A Preferred Stock, authorizations or issuances by the Company of securities that are senior to, or equal in priority with, the Series A Preferred Stock, increases or decreases in the number of authorized shares of Series A Preferred Stock after the Issuance, certain mergers or consolidations of the Company and certain restricted acquisitions. Notwithstanding the foregoing, pursuant to the terms of the Certificate of Designations, in no event shall the Series A Preferred Stock have voting rights in excess of 49 % (together with any shares of Common Stock otherwise held by the Investors, permitted transferees and their affiliates) of the then issued and outstanding Common Stock. Redemption At any time on or after the fourth anniversary of the Original Issuance Date, the Company may redeem (the “Company Redemption Right”), ratably, in whole (or, so long as the Company reasonably determines in good faith (taking into account solely the holders’ ownership of the Series A Preferred Stock and ownership of any Common Stock received in connection with the conversion of such Series A Preferred Stock) that such partial redemption of Series A Preferred Stock will be treated as a sale or exchange for United States federal income tax purposes pursuant to Section 302(b) of the Internal Revenue Code of 1986, in part), the shares of Series A Preferred Stock of any holder outstanding at such time at a redemption price per share of Series A Preferred Stock equal to the following: (A) if the applicable redemption date is on or after the fourth anniversary of the Original Issuance Date and before the fifth anniversary of the Original Issuance Date, the greater of (1) the product of (x) the sum of (I) the liquidation preference of such shares of Series A Preferred Stock to be redeemed, plus (II) the accrued dividends in respect of such share of Series A Preferred Stock to be redeemed as of such redemption date, multiplied by (y) 105% and (2) the volume weighted average price (“VWAP”) of the average of the Common Stock for each of the 10 consecutive full trading days ending on, and including, the trading day immediately preceding such day of measurement, adjusted pursuant to the Certificate of Designations (the “Current Market Price”) as of such redemption date of the Common Stock into which such shares of Series A Preferred Stock could be converted on an as converted basis; (B) if the applicable redemption date is on or after the fifth anniversary of the Original Issuance Date and before the sixth anniversary of the Original Issuance Date, the greater of (1) the product of (x) the sum of (I) the liquidation preference of such share of Series A Preferred Stock to be redeemed, plus (II) the accrued dividends in respect of such share of Series A Preferred Stock to be redeemed, multiplied by (y) 103% and (2) the Current Market Price as of such redemption date of the Common Stock into which such shares of Series A Preferred Stock could be converted on an as converted basis; and (C) if the applicable redemption date is on or after the sixth anniversary of the Original Issuance Date, the greater of (1) the product of (x) the sum of (I) the liquidation preference of such share of Series A Preferred Stock to be redeemed, plus (II) the accrued dividends in respect of such share of Series A Preferred Stock to be redeemed , multiplied by (y) 100% and (2) the Current Market Price as of such redemption date of the Common Stock into which such shares of Series A Preferred Stock could be converted on an as converted basis. Notwithstanding the foregoing, the Company will not exercise the Company Redemption Right, or otherwise send a notice of company redemption, in respect of the redemption of any Series A Preferred Stock unless the Company has sufficient funds legally available to fully pay the redemption price in respect of all shares of Series A Preferred Stock called for redemption. Change in Control Redemption Upon certain change of control events involving the Company, the holders of Series A Preferred Stock may, at such holder’s election, convert all or a portion of its shares of Series A Preferred Stock, provided that if the holder does not make such an election with respect to all of its shares of Series A Preferred Stock, the Company shall redeem all of such holder’s shares of Series A Preferred Stock that have not been so converted at a purchase price per share of Series A Preferred Stock, payable in cash equal to the greater of (A) the sum of the liquidation preference thereof, plus any accrued dividends as of the applicable change of control purchase date and (B) the amount of cash and the fair market value of any other property that the holder would have received if such holder had converted their Series A Preferred Stock into Common Stock immediately prior to the change of control (without regard to any limitations on conversions set forth in the Certificate of Designations. Conversion The Series A Preferred Stock is convertible, in whole or in part, at the option of the holders (subject to the conversion limitation set forth in the Certificate of Designations) into shares of Common Stock at an initial conversion rate of 105.9322 shares of Common Stock per share of Series A Preferred Stock. At any time after the third anniversary of the Original Issuance Date, if (i) the VWAP of the Common Stock exceeds $ 18.88 (the “Mandatory Conversion Price”), for at least 20 trading days in any period of 30 consecutive trading days and (ii) either (x) the Common Stock VWAP is greater than the Mandatory Conversion Price on the trading day immediately prior to the date the Company sends the applicable notice of mandatory conversion or (y) the Company has not filed a press release or report under the Securities Exchange Act of 1934, as amended, between the last trading day in such 30 day trading period and the date the Company sends the applicable notice of mandatory conversion, then the Company may elect to convert all or any portion of the Series A Preferred Stock into the relevant number of shares of Common Stock. Notwithstanding the foregoing, pursuant to the terms of the Certificate of Designations, in no event shall the Series A Preferred Stock be convertible into Common Stock in a manner that would result in the Investors, their permitted transferees and affiliates holding more than 49 % (together with any shares of Common Stock otherwise held by the Investors, permitted transferees and their affiliates) of the then issued and outstanding Common Stock. The calculations of earnings per share for all periods presented herein during which the Series A Preferred Stock was outstanding do not treat conversion of the Series A Preferred Stock as if it had occurred, as the effect of conversion would be anti-dilutive. As of September 30, 2024 , the Series A Preferred Stock is not probable of becoming redeemable as the most likely method of settlement is through conversion which is likely to occur before the holder right to request redemption becomes exercisable.

Earnings (Loss) Per Share of Co

Earnings (Loss) Per Share of Common Stock	12 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Earnings (Loss) Per Share of Common Stock	17. Earnings (Loss) Per Share of Common Stock The Company calculates basic and diluted (loss) earnings per common share using the two-class method. The two-class method is an allocation formula that determines net income (loss) per common share for each share of common stock and Series A Convertible Preferred Stock, a participating security, according to dividends declared and participation rights in undistributed earnings. Under this method, all earnings (distributed and undistributed) are allocated to common shares and Series A Convertible Preferred Stock based on their respective rights to receive dividends. The holders of Series A Convertible Preferred Stock participate in cash dividends that the Company pays on its common stock in an as-converted basis. Diluted net income (loss) per common share is computed based on the weighted average number of shares of common stock outstanding during each period, plus potential common shares considered outstanding during the period, as long as the inclusion of such awards is not antidilutive. Potential common shares consist of unvested and unexercised stock compensation awards and the Series A Convertible Preferred Stock, using the more dilutive of either the two-class method or if-converted stock method. Set forth below is a reconciliation of the numerator and denominator for basic and diluted (loss) earnings per share calculation for the periods indicated: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Basic Earnings (Loss) per common share Numerator: Net income (loss) $ 66.4 $ ( 7.7 ) $ 14.0 Less: dividends on Series A convertible preferred shares ( 35.7 ) ( 3.2 ) — Less: Earnings allocated to Convertible Preferred Shares ( 11.2 ) — — Net income (loss) available to common shareholders $ 19.5 $ ( 10.9 ) $ 14.0 Denominator: Weighted average number of common shares outstanding – basic 94,673,000 93,412,000 97,898,000 Basic earnings (loss) per share $ 0.21 $ ( 0.12 ) $ 0.14 Diluted earnings (loss) per common share Numerator: Net income (loss) available to common shareholders – diluted $ 19.5 $ ( 10.9 ) $ 14.0 Denominator: Weighted average number of common shares outstanding – basic 94,673,000 93,412,000 97,898,000 Dilutive effect of: Stock compensation awards 1,403,000 — 263,000 Series A convertible preferred stock — — — Weighted average number of common shares outstanding – diluted 96,076,000 93,412,000 98,161,000 Diluted earnings (loss) per share $ 0.20 $ ( 0.12 ) $ 0.14 Other Information: Weighted average number of anti-dilutive Series A convertible preferred shares, options and restricted stock (a) 56,587,000 9,656,000 5,010,000 (a) Weighted average number of anti-dilutive options is based upon the average closing price of the Company’s common stock on the NYSE for the period.

Subsequent Events

Subsequent Events	12 Months Ended
	Sep. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	18. Subsequent events Commencing with the first quarter of fiscal 2025, which began on October 1, 2024, the Company adopted a revised segment presentation whereby certain expenses currently classified as "Corporate", including corporate executive compensation, finance, legal and information technology, will be instead allocated to its two reportable segments, Maintenance Services and Development Services, on a pro rata basis, based on segment revenue. The changes to the Company's segment reporting will be reflected beginning with its Quarterly Report on Form 10-Q for the quarter ending December 31, 2024.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These consolidated financial statements have been prepared by the Company in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and include the accounts of the Company and its wholly-owned subsidiaries which are directly or indirectly owned by the Company. Results of acquired companies are included in the consolidated financial statements from the effective date of the acquisition. All intercompany transactions and account balances have been eliminated.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the period. On an ongoing basis, management reviews its estimates, including those related to allowances for doubtful accounts, revenue recognition, self-insurance reserves, estimates related to the Company’s assessment of goodwill for impairment, useful lives for depreciation and amortization, realizability of deferred tax assets, and litigation based on currently available information. Changes in facts and circumstances may result in revised estimates and actual results may differ from estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include deposits in banks and money market funds with maturities of less than three months at the time of deposit or investment. Under our cash management system, checks issued but not yet presented to banks that would result in negative bank balances when presented are classified as a current liability in the Consolidated Balance Sheets. Changes in book overdrafts from period to period are reported in the Consolidated Statements of Cash Flows as a financing activity.
Accounts Receivable	Accounts Receivable Accounts receivable are recorded at the invoiced amount and do not bear interest. The Company reserves for all accounts that are deemed to be uncollectible and reviews its allowance for doubtful accounts regularly. The allowance is based on the age of receivables and a specific identification of receivables considered at risk, representing its best estimate of probable credit losses in existing trade accounts receivable (see Note 5 "Accounts Receivable, net"). Account balances are written off against the allowance when the potential for recovery is considered remote. Accounts receivable also includes customer balances that have been billed or are billable to the Company’s customers but will not be collected until completion of the project or as otherwise specified in the contract. These amounts generally represent 5 - 10 % of the total contract value.
Property and Equipment	Property and Equipment Property and equipment is carried at cost, including the cost of labor for internal use software, less accumulated depreciation, except for those assets acquired through a business combination, in which case they have been stated at estimated fair value as of the date of the business combination, less accumulated depreciation. Costs of replacements or maintenance and repairs that do not improve or extend the life of the related assets are expensed as incurred. Depreciation is computed using the straight-line method over the estimated useful lives of the assets and included in Cost of services provided or Selling, general and administrative expense as appropriate.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the fair values of the underlying net assets acquired in an acquisition. Goodwill is not amortized, but rather is tested annually for impairment, or more frequently if events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. The Company tests goodwill for impairment annually in the fourth quarter of each year using data as of July 1 of that year. Goodwill is allocated to, and evaluated for impairment at, the Company’s two identified reporting units. Goodwill is tested for impairment by either performing a qualitative evaluation or a quantitative test. The qualitative evaluation is an assessment of factors to determine whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount. The Company may elect not to perform the qualitative assessment for some or all reporting units and perform the quantitative impairment test. The quantitative goodwill impairment test requires the Company to compare the carrying value of the reporting unit’s net assets to the estimated fair value of the reporting unit. The Company determines the estimated fair values of each of the reporting units using a combination of the income and market multiple approaches. The estimates used in each approach include significant management assumptions, including valuation multiples of selected guideline public companies, long-term future growth rates, operating margins, and discount rates. If the estimated fair value exceeds the carrying value, no further evaluation is required, and no impairment loss is recognized. If the carrying amount of a reporting unit, including goodwill, exceeds the estimated fair value, the excess of the carrying value over the estimated fair value is recorded as an impairment loss, the amount of which is not to exceed the total amount of goodwill allocated to the reporting unit. Definite-lived intangible assets consist of acquired customer contracts and relationships, non-compete agreements and trademarks. Acquired customer relationships are amortized in an accelerated pattern consistent with expected future cash flows. Non-compete agreements and trademarks are amortized straight-line over their estimated useful lives.
Impairment of Long-lived Assets	Impairment of Long-lived Assets Property and equipment and definite-lived intangible assets are reviewed for impairment annually, or whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized for the amount by which the carrying amount of the asset exceeds the fair value.
Financing Costs	Financing Costs Financing costs, consisting of fees and other expenses associated with borrowings, are amortized over the terms of the related borrowings using the effective interest rate method (see Note 9 "Long-term Debt "). Financing costs are presented in the Consolidated Balance Sheets as a direct reduction from the carrying amount of the related borrowings.
Self-Insurance Reserves	Self-Insurance Reserves The Company carries general liability, auto liability, workers’ compensation, and employee health care insurance policies. In addition, the Company carries other reasonable and customary insurance policies for a Company of our size and scope, as well as umbrella liability insurance policies to cover claims over the liability limits contained in the primary policies. The Company’s insurance programs for general liability, vehicle liability, workers’ compensation and employee health care for certain employees contain self-insured retention amounts. Claims that are not self-insured as well as claims in excess of the self-insured retention amounts are insured. The Company uses estimates in the determination of the required reserves. These estimates are based upon calculations performed by third-party actuaries, as well as examination of historical trends, demographic factors and industry claims experience. A receivable for an insurance recovery is generally recognized when the loss has occurred and collection is considered probable (see Note 14 "Commitments and Contingencies ").
Fair value of Financial Instruments	Fair value of Financial Instruments In evaluating the fair value of financial assets and liabilities, GAAP outlines a valuation framework and creates a fair value hierarchy that distinguishes between market assumptions based on market data (“observable inputs”) and a reporting entity’s own assumptions about market data (“unobservable inputs”). Fair value is defined as the price at which an orderly transaction to sell an asset or transfer a liability would take place between market participants at the measurement date under current market conditions (that is, an exit price at the measurement date from the perspective of a market participant that holds the asset or owes the liability). Fair Value Hierarchy The following hierarchy for inputs used in measuring fair value should maximize the use of observable inputs and minimize the use of unobservable inputs by requiring that the most observable inputs be used when available: Level 1 Quoted prices in active markets for identical assets or liabilities that are accessible at the measurement dates. Level 2 Significant observable inputs that are used by market participants in pricing the asset or liability based on market data obtained from independent sources. Level 3 Significant unobservable inputs the Company believes market participants would use in pricing the asset or liability based on the best information available. The carrying amounts shown for the Company’s cash and cash equivalents, accounts receivable and accounts payable approximate fair value due to the short-term maturity of those instruments. The valuation is based on settlements of similar financial instruments, all of which are short-term in nature and are generally settled at or near cost. See Note 9 "Long-term Debt", Note 10 "Fair Value Measurements and Derivative Instruments" and Note 16 "Mezzanine Equity " for other financial instruments subject to fair value estimates.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities The Company’s objective in entering into derivative transactions is to manage its exposure to interest rate movements associated with its variable rate debt and changes in fuel prices. The Company recognizes derivatives as either assets or liabilities on the Consolidated Balance Sheets and measures those instruments at fair value. Since all of the Company’s derivatives are designated as cash flow hedges, the entire change in the fair value of the derivative included in the assessment of hedge effectiveness is initially reported in Other comprehensive (loss) income and subsequently reclassified to Interest expense, net (interest rate contracts) or Cost of services provided (fuel hedge contracts) in the accompanying Consolidated Statements of Operations at the time the hedge transaction affects earnings. If it is determined that a derivative is not highly effective as a hedge, or if the hedged forecasted transaction is no longer probable of occurring, the amount recognized in Accumulated other comprehensive (loss) income is released to earnings. See Note 10 "Fair Value Measurements and Derivative Instruments " for more information.
Revenue Recognition	Revenue Recognition The Company’s revenue is generated from Maintenance Services and Development Services. The Company generally recognizes revenue from the sale of services as the services are performed, which is typically ratably over the terms of the contracts , which the Company believes to be the best measure of progress. The Company recognizes revenues as it transfers control of products and services to its customers in an amount reflecting the total consideration it expects to receive from the customer. Revenue is recognized according to the following five step model: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenues when a performance obligation is satisfied. The Company determined that for contracts containing multiple performance obligations, stand-alone selling price is readily determinable for each performance obligation and therefore allocation of the transaction price to multiple performance obligations is not necessary. The transaction price will include estimates of variable consideration, such as returns and provisions for doubtful accounts and sales incentives, to the extent it is probable that a significant reversal of revenue recognized will not occur. In all cases, when a sale is recorded by the Company, no significant uncertainty exists surrounding the purchaser’s obligation to pay. The Company’s Maintenance Services revenues are generated primarily through landscape maintenance services and snow removal services. Landscape maintenance services that are primarily viewed as non-discretionary, such as lawn care, mowing, gardening, mulching, leaf removal, irrigation and tree care, are provided under recurring annual contracts, which typically range from one to three years in duration and are generally cancellable by the customer with 30-90 days’ notice. Snow removal services are provided on either fixed fee based contracts or per occurrence contracts. Both landscape maintenance services and snow removal services can also include enhancement services that represent supplemental maintenance or improvement services generally provided under contracts of short duration related to specific services. Revenue for landscape maintenance and snow removal services under fixed fee models is recognized over time using an output based method. Additionally, a portion of the Company’s recurring fixed fee landscape maintenance and snow removal services are recorded under the series guidance. The right to invoice practical expedient is generally applied to revenue related to per occurrence contracts as well as enhancement services. When the practical expedient is not applied, revenue is recognized using a cost-to-cost input method. Fees for contracted landscape maintenance services are typically billed on an equal monthly basis. Fees for fixed fee snow removal services are typically billed on an equal monthly basis during snow season, while fees for time and material or other activity-based snow removal services are typically billed as the services are performed. Fees for enhancement services are typically billed as the services are performed. Development Services revenues are generated primarily through landscape architecture and development services. For Development Services, revenue is primarily recognized over time using the cost-to-cost input method, measured by the percentage of cost incurred to date to the estimated total cost for each contract. The full amount of anticipated losses on contracts is recorded as soon as such losses can be estimated. Changes in job performance, job conditions, and estimated profitability, including final contract settlements, may result in revisions to costs and revenue and are recognized in the period in which the revisions are determined. When contract revenue is recognized in excess of the amount the Company has invoiced or has the right to invoice, a contract asset is recognized. Contract assets are transferred to Accounts receivable, net when the rights to the consideration become unconditional. Contract assets are presented as Unbilled revenue on the Consolidated Balance Sheets. Contract liabilities consist of consideration that is contractually due from customers, or payments thereof, in advance of providing the product or performing services such that control has not passed to the customer. Contract liabilities are presented as Deferred revenue on the Consolidated Balance Sheets.
Cost of Services Provided	Cost of Services Provided Cost of services provided represents the cost of labor, subcontractors, materials, vehicle and equipment costs (including depreciation, fuel and maintenance) and other costs directly associated with revenue generating activities. These costs are expensed as incurred.
Leases	Leases The Company leases office space, branch locations, vehicles, and operating equipment. Lease agreements are evaluated to determine whether they are finance or operating leases. If substantially all of the risks and benefits of property ownership are expected to transfer to the Company, the lease qualifies as a finance lease. Finance leases are capitalized at the lower of net present value of the total amount of rent payable under the leasing agreement (utilizing the implicit borrowing rate of the Company, as applicable) or the fair market value of the leased asset. Finance lease assets are depreciated on a straight-line basis, over a period consistent with the Company’s normal depreciation policy for property and equipment, but not exceeding the lease term. Interest charges are expensed over the period of the lease in relation to the carrying value of the finance lease obligation.
Equity-based Compensation	Equity-based Compensation The Company’s equity-based compensation consists of stock options, restricted stock awards, restricted stock units and performance stock units. The Company expenses equity-based compensation using the estimated fair value as of the grant date over the requisite service or performance period applicable to the grant. Estimates of future forfeitures are made at the date of grant and revised, if necessary, in later periods if subsequent information indicates actual forfeitures will differ from those estimates. See Note 13 "Equity-Based Compensation " for more information.
Income Taxes	Income Taxes Deferred tax assets and liabilities are determined based on differences between financial reporting and tax basis of assets and liabilities, and are measured by applying enacted tax rates and laws for the taxable years in which those differences are expected to reverse. Deferred tax assets are evaluated for the estimated future tax effects of deductible temporary differences and tax operating loss carryovers. A valuation allowance is recorded when it is more likely than not that a deferred tax asset will not be realized. The Company records a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in a tax return. We assess income tax positions for all years subject to examination based upon our evaluation of the facts, circumstances and information available at the reporting date. For those income tax positions where it is not more likely than not that a tax benefit would be sustained upon ultimate settlement with a taxing authority assumed to have full knowledge of all relevant information, the Company would record a liability for unrecognized tax benefits. The Company recognizes interest and penalties, if any, related to unrecognized tax benefits in income tax expense and benefit.

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Reportable Segment Revenues, Disaggregated by Revenue	The following table presents the Company’s reportable segment revenues, disaggregated by revenue type. The Company disaggregates revenue from contracts with customers into major services lines. The Company has determined that disaggregating revenue into these categories depicts how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. As noted in the business segment reporting information in Note 15 "Segments", the Company’s reportable segments are Maintenance Services and Development Services. Fiscal Year Ended September 30, 2024 2023 2022 Landscape Maintenance $ 1,743.2 $ 1,857.5 $ 1,825.7 Snow Removal 220.8 209.0 256.3 Maintenance Services 1,964.0 2,066.5 2,082.0 Development Services 808.8 758.0 698.8 Eliminations ( 5.7 ) ( 8.5 ) ( 6.2 ) Net service revenues $ 2,767.1 $ 2,816.0 $ 2,774.6
Schedule of Contract Balances	Changes in Deferred revenue for the fiscal year ended September 30, 2024 were as follows: Deferred Balance, September 30, 2023 $ 68.2 Recognition of revenue ( 1,180.8 ) Deferral of revenue 1,197.2 Divestiture (Note 7) ( 0.9 ) Balance, September 30, 2024 $ 83.8

Property and Equipment, net (Ta

Property and Equipment, net (Tables)	12 Months Ended
	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment, Net	Property and equipment, net consists of the following: Useful Life September 30, September 30, Land — $ 42.9 $ 44.7 Buildings and leasehold improvements 2 - 40 yrs. 46.7 45.6 Operating equipment 2 - 7 yrs. 388.3 338.8 Transportation vehicles 3 - 7 yrs. 403.1 351.9 Office equipment and software 3 - 10 yrs. 48.6 68.7 Construction in progress — 4.9 7.7 Property and equipment 934.5 857.4 Less: Accumulated depreciation 542.6 542.2 Property and equipment, net $ 391.9 $ 315.2

Intangible Assets, Goodwill, _2

Intangible Assets, Goodwill, Acquisitions and Divestitures (Tables)	12 Months Ended
	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets	Intangible assets as of September 30, 2024 and September 30, 2023 consisted of the following: September 30, 2024 September 30, 2023 Estimated Gross Accumulated Gross Accumulated Customer relationships 6 - 21 yrs. $ 715.9 $ ( 620.1 ) $ 725.5 $ ( 594.1 ) Trademarks 12 yrs. — — 3.8 ( 2.9 ) Non-compete agreements 5 yrs. — — 2.7 ( 2.7 ) Total intangible assets $ 715.9 $ ( 620.1 ) $ 732.0 $ ( 599.7 )
Schedule of Future Amortization Expense	Amortization expense is anticipated to be as follows in future years: Fiscal Year Ended September 30, 2025 $ 29.3 2026 21.8 2027 15.2 2028 11.1 2029 7.2 2030 and thereafter 11.2 $ 95.8
Summary of Goodwill	The following is a summary of the goodwill activity for the periods ended September 30, 2023 and September 30, 2024: Maintenance Development Total Balance, September 30, 2022 $ 1,792.7 $ 216.1 $ 2,008.8 Acquisitions (1) 10.7 1.9 12.6 Balance, September 30, 2023 $ 1,803.4 $ 218.0 $ 2,021.4 Acquisitions (1) 0.1 — 0.1 Divestiture ( 5.8 ) — ( 5.8 ) Balance, September 30, 2024 $ 1,797.7 $ 218.0 $ 2,015.7 (1) The acquisitions adjustments include the immaterial impact of foreign currency and other prior year measurement period adjustments during the respective periods.

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	12 Months Ended
	Sep. 30, 2024
Payables and Accruals [Abstract]
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consist of the following as of: September 30, 2024 September 30, 2023 Payroll related accruals $ 62.6 $ 52.2 Accrued operating expenses 115.5 77.7 Current portion of finance lease liabilities 37.0 21.5 Other accruals 22.6 28.8 Accrued expenses and other current liabilities $ 237.7 $ 180.2

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Long-term debt consists of the following: September 30, September 30, Series B term loan $ 732.8 $ 731.7 Receivables financing agreement 76.2 163.0 Financing costs, net ( 6.5 ) ( 6.6 ) Total debt, net $ 802.5 $ 888.1 Less: Current portion of long-term debt - - Long-term debt, net $ 802.5 $ 888.1
Scheduled Maturities of Long-Term Debt	The following are the scheduled maturities of long-term debt for the next five fiscal years and thereafter, which do not include any estimated excess cash flow payments: 2025 $ — 2026 — 2027 76.2 2028 — 2029 and thereafter 738.0 Total long-term debt 814.2 Less: Current maturities — Less: Original issue discount 5.2 Less: Financing costs 6.5 Total long-term debt, net $ 802.5

Fair Value Measurements and D_2

Fair Value Measurements and Derivative Instruments (Tables)	12 Months Ended
	Sep. 30, 2024
Derivative Instruments Gain Loss [Line Items]
Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following tables summarize the financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2024 and September 30, 2023: September 30, 2024 Carrying Value Level 1 Level 2 Level 3 Other assets: Investments held by Rabbi Trust $ 9.7 $ 9.7 $ — $ — Total assets $ 9.7 $ 9.7 $ — $ — Accrued expenses and other current liabilities: Fuel derivative contracts $ ( 0.5 ) $ — $ ( 0.5 ) $ — Other liabilities: Interest rate derivative contracts ( 2.5 ) — ( 2.5 ) — Obligation to Rabbi Trust ( 9.7 ) ( 9.7 ) — — Total liabilities $ ( 12.7 ) $ ( 9.7 ) $ ( 3.0 ) $ — September 30, 2023 Carrying Value Level 1 Level 2 Level 3 Other assets: Investments held by Rabbi Trust $ 10.9 $ 10.9 $ — $ — Interest rate derivative contracts 21.3 — 21.3 — Total Assets $ 32.2 $ 10.9 $ 21.3 $ — Other liabilities: Obligation to Rabbi Trust $ 10.9 $ 10.9 $ — $ — Total Liabilities $ 10.9 $ 10.9 $ — $ —
Interest Rate Contracts
Derivative Instruments Gain Loss [Line Items]
Summary of Effects on Consolidated Financial Statements of Designated As Cash Flow Hedges	The effects on the consolidated financial statements of the interest rate contracts which were designated as cash flow hedges were as follows: Fiscal Year Ended 2024 2023 2022 (Loss) income recognized in Other comprehensive (loss) income $ ( 13.3 ) $ 36.1 $ 6.1 Net gain (loss) reclassified from Accumulated other 11.1 15.2 ( 0.5 )
Fuel Swap Contracts
Derivative Instruments Gain Loss [Line Items]
Summary of Effects on Consolidated Financial Statements of Designated As Cash Flow Hedges	The effects on the consolidated financial statements of the fuel swap contracts which were designated as cash flow hedges were as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 (Loss) income recognized in Other comprehensive (loss) income $ ( 0.5 ) $ — $ 0.2 Net gain reclassified from Accumulated other comprehensive (loss) income into Cost of services provided — — 1.5

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense (benefit) are as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Current: Federal $ 23.1 $ 22.7 $ 7.5 State 5.3 3.4 4.7 Deferred: Federal ( 0.8 ) ( 22.4 ) ( 3.7 ) State 1.3 ( 4.2 ) ( 2.9 ) Valuation allowance 1.2 5.1 — Total income tax (benefit) expense $ 30.1 $ 4.6 $ 5.6
Schedule of Income Tax Expense (Benefit) Differs from Amount Computed at Federal Statutory Corporate Tax Rate	Income tax expense (benefit) differs from the amount computed at the federal statutory corporate tax rate as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Federal tax at statutory rate $ 20.3 $ ( 0.7 ) $ 4.1 State tax, net of federal tax (benefit) expense 4.8 ( 0.8 ) 1.2 Tax effect of: Equity-based compensation 0.9 0.9 0.6 Non-deductible officers’ compensation 1.3 1.1 0.7 Provision to return and deferred tax adjustments 0.3 ( 0.8 ) ( 0.3 ) Non-deductible promotional and entertainment expense 0.9 0.6 0.4 Fuel tax credit and other credits ( 0.6 ) ( 0.7 ) ( 0.8 ) Carryback claim, net of adjustments — ( 0.8 ) ( 0.3 ) Divestiture - Non-deductible goodwill 1.2 — — Rate changes 0.2 0.5 — Valuation allowance 1.2 5.1 — Other, net ( 0.4 ) 0.2 — Income tax expense $ 30.1 $ 4.6 $ 5.6
Components of Net Deferred Tax Asset and Liability Accounts	The components of the Company’s net deferred tax asset and liability accounts resulting from temporary differences between the tax and financial reporting basis of assets and liabilities are as follows: September 30, 2024 September 30, 2023 Deferred tax assets: Self-insurance reserves $ 37.3 $ 31.8 Deferred compensation 2.2 2.8 Payroll related accruals 25.3 22.8 Allowance for doubtful accounts 2.5 1.3 Lease liabilities 22.3 23.6 Net operating loss carryforward 4.9 7.1 Business interest expense 17.2 10.4 Other non-current deferred tax assets 1.2 4.5 Total non-current deferred tax assets 112.9 104.3 Valuation allowance ( 6.3 ) ( 5.1 ) Total deferred tax assets $ 106.6 $ 99.2 Deferred tax liabilities: Intangible assets $ 47.1 $ 46.2 Property and equipment 63.2 57.3 Deferred revenue 16.6 15.0 Prepaid assets 0.1 0.2 Lease assets 20.7 22.0 Other non-current deferred tax liabilities 1.5 6.0 Total non-current deferred tax liabilities 149.2 146.7 Total net deferred tax liabilities $ 42.6 $ 47.5 Classification on balance sheets: Other assets $ 1.3 $ 3.6 Deferred tax liabilities 43.9 51.1

Leases (Tables)

Leases (Tables)	12 Months Ended
	Sep. 30, 2024
Leases [Abstract]
Summary of Lease-Related Assets and Liabilities	The following table summarizes the lease-related assets and liabilities recorded in the Consolidated Balance Sheets at September 30, 2024 and 2023: Fiscal Year Ended September 30, 2024 September 30, 2023 Operating leases: Right-of-use asset $ 81.3 $ 86.1 Current portion of lease liabilities 24.9 27.3 Lease liabilities 62.6 65.1 Total operating lease liabilities $ 87.5 $ 92.4 Finance leases: Right-of-use asset (1) $ 67.7 $ 41.3 Current portion of lease liabilities (2) 37.0 21.5 Lease liabilities (3) 31.2 21.3 Total finance lease liabilities $ 68.2 $ 42.8 (1) Included in “Property and equipment, net” in the Consolidated Balance Sheets. (2) Included in “Accrued expenses and other liabilities” in the Consolidated Balance Sheets. (3) Included in “Other liabilities” in the Consolidated Balance Sheets.
Summary of Weighted-average Remaining Lease Terms and Incremental Borrowing Rates	The weighted-average remaining lease terms and incremental borrowing rates as of September 30, 2024 and 2023 were as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 Operating leases: Weighted-average remaining lease term (years) 4.4 4.7 Weighted-average incremental borrowing rate 4.9 % 4.0 % Finance leases: Weighted-average remaining lease term (years) 2.4 2.4 Weighted-average incremental borrowing rate 5.9 % 3.8 %
Summary of Components of Lease Cost for Operating and Finance Leases	The components of lease cost for operating and finance leases for the fiscal year ended September 30, 2024 and 2023 were as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 Operating lease cost $ 31.5 $ 32.1 Finance lease cost: Amortization of right-of-use asset 34.7 27.0 Interest on lease liabilities 3.2 1.6 Total finance lease cost 37.9 28.6 Short-term lease cost 22.1 23.7 Variable lease costs not included in lease liability 3.8 3.3 Sublease income ( 0.7 ) ( 0.7 ) Total lease cost $ 94.6 $ 87.0
Summary of Supplemental Cash Flow Information	Supplemental cash flow information for the fiscal year ended September 30, 2024 and 2023 were as follows: Fiscal Year Ended September 30, 2024 September 30, 2023 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 27.7 $ 28.9 Operating cash flows from finance leases 3.2 1.6 Financing cash flows from finance leases 36.3 27.6 Non-cash items: Right-of-use Assets Obtained In Exchange For New Operating Liabilities 27.1 33.4 Right-of-use Assets Obtained In Exchange For New Finance Liabilities 65.4 26.3
Summary of Maturities of Operating and Finance Lease Liabilities	Maturities of operating and finance lease liabilities as of September 30, 2024 were as follows: Fiscal Year Operating Lease Finance Lease 2025 $ 28.5 $ 40.0 2026 23.4 21.3 2027 16.7 7.1 2028 11.5 3.2 2029 7.2 1.3 Thereafter 10.7 0.2 Total net lease payments 98.0 73.1 Less: Amounts representing interest ( 10.5 ) ( 4.9 ) Total lease liabilities 87.5 68.2 Less: Current portion of lease liabilities ( 24.9 ) ( 37.0 ) Non-current lease liabilities $ 62.6 $ 31.2

Equity-Based Compensation (Tabl

Equity-Based Compensation (Tables)	12 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Restricted Stock Award Activity	A summary of the Company’s restricted stock award activity for the year ended September 30, 2024 is presented in the following table: Shares Weighted-Avg Distribution Price per Share Outstanding at September 30, 2023 213,000 $ 14.66 Less: Forfeited 106,000 $ 14.66 Outstanding at September 30, 2024 107,000 $ 14.66
Schedule of Restricted Stock Unit Activity	A summary of the Company’s restricted stock unit activity for the year ended September 30, 2024 is presented in the following table: Shares Weighted-Avg Distribution Price per Share Outstanding at September 30, 2023 3,021,000 $ 9.32 Granted 2,667,000 $ 8.24 Less: Vested 1,285,000 $ 9.67 Less: Forfeited 689,000 $ 8.92 Outstanding at September 30, 2024 3,714,000 $ 8.50
Summary of Stock Options Activity	A summary of the Company’s stock option activity for the year ended September 30, 2024 is presented in the following table: Shares Weighted-Avg Exercise Price per Share Outstanding at September 30, 2023 4,449,000 $ 19.06 Less: Exercised 166,000 $ 13.84 Less: Forfeited 1,247,000 $ 19.00 Outstanding at September 30, 2024 3,036,000 $ 19.37 Vested and exercisable at September 30, 2024 2,527,000 $ 19.33 Expected to vest after September 30, 2024 509,000 $ 19.54
Summary of Company's Performance Stock Unit Activity	A summary of the Company’s performance stock unit activity for the year ended September 30, 2024 is presented in the following table: Shares Weighted-Avg Distribution Price per Share Outstanding at September 30, 2023 512,000 $ 7.48 Granted 918,000 $ 7.35 Less: Forfeited 316,000 $ 7.40 Outstanding at September 30, 2024 1,114,000 $ 7.40
Schedule of Weighted-Average Assumptions Used in Valuation of PSU Awards Subject to Market Condition and Stock Option Awards Granted	The weighted-average assumptions used in the valuation of PSU awards subject to a market condition and stock option awards granted for the year ended September 30, 2022 are presented in the table below: Fiscal Year Ended September 30, 2022 Assumptions: Risk-free interest rate 1.88 % Dividend yield — Volatility factor 47.10 % Expected term (in years) 5.3

Segments (Tables)

Segments (Tables)	12 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Summary of Certain Financial Data For Each of Segments	The following is a summary of certain financial data for each of the segments: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Maintenance Services $ 1,964.0 $ 2,066.5 $ 2,082.0 Development Services 808.8 758.0 698.8 Eliminations ( 5.7 ) ( 8.5 ) ( 6.2 ) Net Service Revenues $ 2,767.1 $ 2,816.0 $ 2,774.6 Maintenance Services $ 279.7 $ 277.9 $ 278.8 Development Services 106.3 82.8 73.7 Corporate ( 61.3 ) ( 62.0 ) ( 64.6 ) Adjusted EBITDA (1) $ 324.7 $ 298.7 $ 287.9 Maintenance Services $ 61.3 $ 56.1 $ 82.9 Development Services 12.8 8.2 12.5 Corporate 4.3 7.0 11.9 Capital Expenditures $ 78.4 $ 71.3 $ 107.3 (1) Presented below is a reconciliation of Net (loss) income to Adjusted EBITDA: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Net income (loss) $ 66.4 $ ( 7.7 ) $ 14.0 Interest expense, net 62.4 97.4 53.3 Income tax expense 30.1 4.6 5.6 Depreciation expense 108.4 105.2 98.9 Amortization expense 35.8 44.5 51.5 Business transformation and integration costs (a) 44.1 23.7 21.5 Gain on divestiture (b) ( 43.6 ) — 0.1 Equity-based compensation (c) 20.5 22.3 19.0 COVID-19 related expenses (d) — 0.4 11.4 Debt extinguishment (e) 0.6 8.3 12.6 Adjusted EBITDA $ 324.7 $ 298.7 $ 287.9 (a) Business transformation and integration costs consist of (i) severance and related costs; (ii) business integration costs and (iii) information technology infrastructure, transformation and other costs. Fiscal Year Ended (in millions) September 30, 2024 September 30, 2023 September 30, 2022 Severance and related costs (f) $ 16.6 $ 8.9 $ 1.6 Business integration (g) ( 0.4 ) 6.2 8.2 IT infrastructure, transformation, and other (h) 27.9 8.6 11.7 Business transformation and integration costs $ 44.1 $ 23.7 $ 21.5 (b) Represents the realized gain on sale and transaction related expenses from the divestiture of U.S. Lawns on January 12, 2024. (c) Represents equity-based compensation expense and related taxes recognized for equity incentive plans outstanding . (d) Represents expenses related to the Company’s response to the COVID-19 pandemic, principally temporary and incremental salary and related expenses, personal protective equipment, cleaning and supply purchases, and other. Additionally, fiscal year 2022 includes refunds related to employee retention credits allowed under the CARES Act. (e) Represents losses on the extinguishment of debt related to Amendments No. 6, No. 7, and No. 8 to the Credit Agreement, in the fiscal years ended September 30, 2022, 2023, and 2024 respectively, and includes accelerated amortization of deferred financing fees and original issue discount as well as fees paid to lenders and third parties. (f) Represents severance and related costs incurred in connection with the Company's One BrightView initiative and CEO transition. (g) Represents isolated expenses specifically related to the integration of acquired companies such as one-time employee retention costs, employee onboarding and training costs, fleet and uniform rebranding costs, and adjustments to performance based contingent consideration. The Company excludes Business integration costs from the non-GAAP measures disclosed above since such expenses vary in amount due to the number of acquisitions and size of acquired companies as well as factors specific to each acquisition, and as a result lack predictability as to occurrence and/or timing, and create a lack of comparability between periods. (h) Represents expenses related to distinct initiatives, typically significant enterprise-wide changes. Such expenses are excluded from the measures disclosed above since such expenses vary in amount based on occurrence as well as factors specific to each of the activities, are outside of the normal operations of the business, and create a lack of comparability between periods.

Earnings (Loss) Per Share of _2

Earnings (Loss) Per Share of Common Stock (Tables)	12 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Reconciliation of Numerator and Denominator for Basic and Diluted (Loss) Earnings Per Share Calculation	Set forth below is a reconciliation of the numerator and denominator for basic and diluted (loss) earnings per share calculation for the periods indicated: Fiscal Year Ended September 30, 2024 September 30, 2023 September 30, 2022 Basic Earnings (Loss) per common share Numerator: Net income (loss) $ 66.4 $ ( 7.7 ) $ 14.0 Less: dividends on Series A convertible preferred shares ( 35.7 ) ( 3.2 ) — Less: Earnings allocated to Convertible Preferred Shares ( 11.2 ) — — Net income (loss) available to common shareholders $ 19.5 $ ( 10.9 ) $ 14.0 Denominator: Weighted average number of common shares outstanding – basic 94,673,000 93,412,000 97,898,000 Basic earnings (loss) per share $ 0.21 $ ( 0.12 ) $ 0.14 Diluted earnings (loss) per common share Numerator: Net income (loss) available to common shareholders – diluted $ 19.5 $ ( 10.9 ) $ 14.0 Denominator: Weighted average number of common shares outstanding – basic 94,673,000 93,412,000 97,898,000 Dilutive effect of: Stock compensation awards 1,403,000 — 263,000 Series A convertible preferred stock — — — Weighted average number of common shares outstanding – diluted 96,076,000 93,412,000 98,161,000 Diluted earnings (loss) per share $ 0.20 $ ( 0.12 ) $ 0.14 Other Information: Weighted average number of anti-dilutive Series A convertible preferred shares, options and restricted stock (a) 56,587,000 9,656,000 5,010,000 (a) Weighted average number of anti-dilutive options is based upon the average closing price of the Company’s common stock on the NYSE for the period.

Business - Additional Informati

Business - Additional Information (Details)	12 Months Ended
	Sep. 30, 2024 Segment shares	Dec. 31, 2023 shares	Sep. 30, 2023 shares	Aug. 28, 2023 shares
Business [Line Items]
Number of reportable segments | Segment	2
Preferred stock, issued	0		0
Series A Convertible Preferred Stock
Business [Line Items]
Preferred stock, issued	500,000		500,000	500,000
Convertible Preferred Stock, Shares Issued upon Conversion		105.9322

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Sep. 30, 2024 ReportingUnit
Product Information [Line Items]
Number of identified reporting units	2
Minimum
Product Information [Line Items]
Percentage of not collected receivable until completion to total contract value	5%
Maximum
Product Information [Line Items]
Percentage of not collected receivable until completion to total contract value	10%

Revenue - Additional Informatio

Revenue - Additional Information (Details) $ in Millions	12 Months Ended
	Sep. 30, 2024 USD ($)
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligations, amount	$ 546.4
Contract with customer billed revenue	185
Contract with customer unbilled revenue additions	$ 179.3
Revenue, practical expedient, financing component	true

Revenue - Schedule of Reportabl

Revenue - Schedule of Reportable Segment Revenues, Disaggregated by Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Disaggregation Of Revenue [Line Items]
Net service revenues	$ 2,767.1	$ 2,816	$ 2,774.6
Operating Segments | Landscape Maintenance
Disaggregation Of Revenue [Line Items]
Net service revenues	1,743.2	1,857.5	1,825.7
Operating Segments | Snow Removal
Disaggregation Of Revenue [Line Items]
Net service revenues	220.8	209	256.3
Operating Segments | Maintenance Services
Disaggregation Of Revenue [Line Items]
Net service revenues	1,964	2,066.5	2,082
Operating Segments | Development Services
Disaggregation Of Revenue [Line Items]
Net service revenues	808.8	758	698.8
Eliminations
Disaggregation Of Revenue [Line Items]
Net service revenues	$ (5.7)	$ (8.5)	$ (6.2)

Revenue - Additional Informat_2

Revenue - Additional Information (Details 1)	Sep. 30, 2024
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-10-01
Disaggregation Of Revenue [Line Items]
Remaining performance obligations, percentage	54%
Remaining performance obligations, expected satisfaction period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-10-01
Disaggregation Of Revenue [Line Items]
Remaining performance obligations, percentage	46%
Remaining performance obligations, expected satisfaction period	12 months

Revenue - Schedule of Changes i

Revenue - Schedule of Changes in Deferred Revenue (Details) $ in Millions	12 Months Ended
	Sep. 30, 2024 USD ($)
Revenue from Contract with Customer [Abstract]
Balance, September 30, 2023	$ 68.2
Recognition of revenue	(1,180.8)
Deferral of revenue	1,197.2
Divestiture (Note 7)	(0.9)
Balance, September 30, 2024	$ 83.8

Accounts Receivable, Net - Addi

Accounts Receivable, Net - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Receivables [Abstract]
Accounts receivable	$ 415.2	$ 442.3
Allowance for doubtful accounts	10	5.1
Amounts of retention on incomplete project	$ 65.7	$ 58.7

Property and Equipment, Net - S

Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Property Plant And Equipment [Line Items]
Property and equipment	$ 934.5	$ 857.4
Less: Accumulated depreciation	542.6	542.2
Property and equipment, net	391.9	315.2
Land
Property Plant And Equipment [Line Items]
Property and equipment	42.9	44.7
Building and Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment	46.7	45.6
Operating Equipment
Property Plant And Equipment [Line Items]
Property and equipment	388.3	338.8
Transportation Vehicles
Property Plant And Equipment [Line Items]
Property and equipment	403.1	351.9
Office Equipment and Software
Property Plant And Equipment [Line Items]
Property and equipment	48.6	68.7
Construction in Progress
Property Plant And Equipment [Line Items]
Property and equipment	$ 4.9	$ 7.7
Minimum | Building and Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	2 years
Minimum | Operating Equipment
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	2 years
Minimum | Transportation Vehicles
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	3 years
Minimum | Office Equipment and Software
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	3 years
Maximum | Building and Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	40 years
Maximum | Operating Equipment
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	7 years
Maximum | Transportation Vehicles
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	7 years
Maximum | Office Equipment and Software
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	10 years

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation	$ 108.4	$ 105.2	$ 98.9

Intangible Assets, Goodwill, _3

Intangible Assets, Goodwill, Acquisitions and Divestitures - Additional Information (Details) $ in Millions			12 Months Ended
		Jan. 12, 2024 USD ($) Subsidiary	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) Company	Sep. 30, 2022 USD ($)
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets			$ 35.8	$ 44.5	$ 51.5
Intangible assets acquired			0
Weighted average amortization period for intangible assets				7 years
Number of unrelated maintenance services companies acquired | Company				3
Consideration paid, net of cash acquired			0	$ 13.8	93.1
Net service revenues			2,767.1	2,816	2,774.6
Number of sale of fully owned subsidiaries | Subsidiary		1
Cash consideration		$ 51	$ 51	$ 0	$ 0
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]			Gain (Loss) on Disposition of Business	Gain (Loss) on Disposition of Business	Gain (Loss) on Disposition of Business
Pre-tax gain (loss) on sale of business	[1]		$ (43.6)	$ 0	$ 0.1
Unrelated Maintenance Services Companies
Finite Lived Intangible Assets [Line Items]
Acquisition of operations, Percentage				100%
Consideration paid, net of cash acquired				$ 13.8
Business Acquisitions
Finite Lived Intangible Assets [Line Items]
Net service revenues				16
Selling, General and Administrative Expense
Finite Lived Intangible Assets [Line Items]
Gain on Sale of Fully Owned Subsidiaries			$ 43.6
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Identifiable assets acquired related to intangible assets				$ 4
[1] Represents the realized gain on sale and transaction related expenses from the divestiture of U.S. Lawns on January 12, 2024.

Intangible Assets, Goodwill, _4

Intangible Assets, Goodwill, Acquisitions and Divestitures - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 715.9	$ 732
Accumulated Amortization	(620.1)	(599.7)
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	715.9	725.5
Accumulated Amortization	$ (620.1)	(594.1)
Customer Relationships | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	6 years
Customer Relationships | Maximum
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	21 years
Trademarks
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	12 years
Gross Carrying Amount	$ 0	3.8
Accumulated Amortization	$ 0	(2.9)
Noncompete Agreements
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	$ 0	2.7
Accumulated Amortization	$ 0	$ (2.7)

Intangible Assets, Goodwill, _5

Intangible Assets, Goodwill, Acquisitions and Divestitures - Schedule of Future Amortization Expense (Details) $ in Millions	Sep. 30, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2025	$ 29.3
2026	21.8
2027	15.2
2028	11.1
2029	7.2
2030 and thereafter	11.2
Total	$ 95.8

Intangible Assets, Goodwill, _6

Intangible Assets, Goodwill, Acquisitions and Divestitures - Summary of Goodwill (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Goodwill [Line Items]
Beginning balance		$ 2,021.4	$ 2,008.8
Acquisitions	[1]	0.1	12.6
Disvesture		(5.8)
Ending balance		2,015.7	2,021.4
Maintenance Services
Goodwill [Line Items]
Beginning balance		1,803.4	1,792.7
Acquisitions	[1]	0.1	10.7
Disvesture		(5.8)
Ending balance		1,797.7	1,803.4
Development Services
Goodwill [Line Items]
Beginning balance		218	216.1
Acquisitions	[1]	0	1.9
Disvesture		0
Ending balance		$ 218	$ 218
[1] The acquisitions adjustments include the immaterial impact of foreign currency and other prior year measurement period adjustments during the respective periods.

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Payables and Accruals [Abstract]
Payroll related accruals	$ 62.6	$ 52.2
Accrued operating expenses	115.5	77.7
Current portion of finance lease liabilities	37	21.5
Other accruals	22.6	28.8
Accrued expenses and other current liabilities	$ 237.7	$ 180.2

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Financing costs, net	$ (6.5)	$ (6.6)
Total debt, net	802.5	888.1
Less: Current portion of long-term debt	0	0
Long-term debt, net	802.5	888.1
Series B Term Loan
Debt Instrument [Line Items]
Debt instruments net of original issue discount	732.8	731.7
Receivables Financing Agreement
Debt Instrument [Line Items]
Debt instruments net of original issue discount	$ 76.2	$ 163

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Details) - USD ($) $ in Millions							12 Months Ended
		May 28, 2024	Aug. 31, 2023	Aug. 28, 2023	Apr. 22, 2022	Dec. 18, 2013	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Jun. 27, 2024
Debt Instrument [Line Items]
Debt repayments							$ 0	$ 459	$ 1,006.3
Loss on debt extinguishment	[1]						(0.6)	(8.3)	(12.6)
Debt voluntary repayment							87.3	554.5	374.4
Debt borrowings during the period							0.5	549.5	$ 391.7
Long-term debt, fair value							$ 812.4	$ 900.1
Receivables Financing Agreement | Wholly-owned Subsidiary
Debt Instrument [Line Items]
Credit agreement, maximum borrowing capacity										$ 325
Interest period term							6 months
Weighted average interest rate							6.70%	6.30%
Commitment fee for unused balance of facility							0.40%
Debt voluntary repayment							$ 0.5	$ 549.5
Debt borrowings during the period							$ 87.3	554.5
SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.50%
SOFR | Maximum | Receivables Financing Agreement | Wholly-owned Subsidiary
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate							170%
SOFR | Minimum | Receivables Financing Agreement | Wholly-owned Subsidiary
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate							140%
ABR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.50%
Series B Term Loan | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.50%
Series B Term Loan | ABR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.50%
Credit Agreement | First Lien Credit Facility Term Loans
Debt Instrument [Line Items]
Credit agreement date						Dec. 18, 2013
Debt instrument, term						7 years
Credit agreement, maximum borrowing capacity						$ 1,460
Credit Agreement | First Lien Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, term						5 years
Credit agreement, maximum borrowing capacity						$ 210
Amended Credit Agreement
Debt Instrument [Line Items]
Loss on debt extinguishment				$ (8.3)	$ (12.6)
Percentage of prepayment premium			1%
Percentage of principle balance used to calculate debt repayments amount of quarterly installments due							0.25%
Debt borrowings during the period				$ 450
Amended Credit Agreement | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.50%
Amended Credit Agreement | ABR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.50%
Amended Credit Agreement | First Lien Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, term					5 years
Credit agreement, maximum borrowing capacity					$ 300
Amended Credit Agreement | Series B Term Loan
Debt Instrument [Line Items]
Debt instrument, term					7 years
Credit agreement, maximum borrowing capacity					$ 1,200
Debt instrument, original discount					$ 12
Debt repayments							$ 0	$ 459
Debt instrument, maturity date					Apr. 22, 2029
Debt instrument, effective interest rate					3.42%
Weighted average interest rate							8.20%	7.80%
Previous Revolving Credit Facility | First Lien Revolving Credit Facility
Debt Instrument [Line Items]
Credit agreement, maximum borrowing capacity					$ 260
Line of credit facility, amount outstanding balance							$ 0	$ 0
Letters of credits, outstanding amount							0	42.6
Revolving Credit Facility | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0%
Revolving Credit Facility | ABR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1%
Revolving Credit Facility | ABR | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.50%
Revolving Credit Facility | ABR | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1%
Revolving Credit Facility | First Lien Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, term					5 years
Credit agreement, maximum borrowing capacity					$ 300
Debt repayments							$ 0	$ 33.5
Debt instrument, maturity date					Apr. 22, 2027
Weighted average interest rate								6.90%
Debt borrowings during the period								$ 33.5
Revolving Credit Facility | First Lien Revolving Credit Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					2.50%
Revolving Credit Facility | First Lien Revolving Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					2%
Revolving Credit Facility | Series B Term Loan | SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					3.25%
Revolving Credit Facility | Series B Term Loan | ABR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					2.25%
[1] Represents losses on the extinguishment of debt related to Amendments No. 6, No. 7, and No. 8 to the Credit Agreement, in the fiscal years ended September 30, 2022, 2023, and 2024 respectively, and includes accelerated amortization of deferred financing fees and original issue discount as well as fees paid to lenders and third parties.

Long-Term Debt - Scheduled Matu

Long-Term Debt - Scheduled Maturities of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Debt Disclosure [Abstract]
2025	$ 0
2026	0
2027	76.2
2028	0
2029 and thereafter	738
Total long term debt	814.2
Less: Current portion of long-term debt	0	$ 0
Less: Original issue discount	5.2
Less: Financing costs	6.5
Total long-term debt, net	$ 802.5	$ 888.1

Fair Value Measurements and D_3

Fair Value Measurements and Derivative Instruments - Additional Information (Details) gal in Millions, $ in Millions		12 Months Ended
	Aug. 28, 2023 USD ($)	Sep. 30, 2024 USD ($) gal	Sep. 30, 2023 USD ($)	Jan. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Interest Rate Contracts
Derivative [Line Items]
Notional amount		$ 600	$ 600
Interest Rate Swaps
Derivative [Line Items]
Notional amount				$ 500	$ 500
Net deferred gain on interest rate swap net of taxes expected to be recognized over the next 12 months		$ 1.8
Interest Rate Collar Agreement
Derivative [Line Items]
Notional amount				$ 500
Terminated notional amount	$ 400
Gain on reclassification of other comprehensive income to earnings	$ 5.2
Fuel Swap Contracts
Derivative [Line Items]
Notional volume | gal		4
Maximum
Derivative [Line Items]
Percentage of participants compensation deferred		70%

Fair Value Measurements and D_4

Fair Value Measurements and Derivative Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Carrying Value | Other Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	$ 9.7	$ 32.2
Carrying Value | Other Assets | Interest Rate Derivative Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets		21.3
Total liabilities	(2.5)
Carrying Value | Other Assets | Fuel Derivative Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	(0.5)
Carrying Value | Other Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	(12.7)	10.9
Investment Held by Rabbi Trust | Carrying Value | Other Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	9.7	10.9
Investment Held by Rabbi Trust | Carrying Value | Other Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	(9.7)	10.9
Level 1 | Other Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	9.7	10.9
Level 1 | Other Assets | Interest Rate Derivative Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets		0
Total liabilities	0
Level 1 | Other Assets | Fuel Derivative Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	0
Level 1 | Other Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	(9.7)	10.9
Level 1 | Investment Held by Rabbi Trust | Other Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	9.7	10.9
Level 1 | Investment Held by Rabbi Trust | Other Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	(9.7)	10.9
Level 2 | Other Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	0	21.3
Level 2 | Other Assets | Interest Rate Derivative Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets		21.3
Total liabilities	(2.5)
Level 2 | Other Assets | Fuel Derivative Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	(0.5)
Level 2 | Other Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	(3)	0
Level 2 | Investment Held by Rabbi Trust | Other Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	0	0
Level 2 | Investment Held by Rabbi Trust | Other Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	0	0
Level 3 | Other Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	0	0
Level 3 | Other Assets | Interest Rate Derivative Contracts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets		0
Total liabilities	0
Level 3 | Other Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	0	0
Level 3 | Investment Held by Rabbi Trust | Other Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	0	0
Level 3 | Investment Held by Rabbi Trust | Other Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total liabilities	$ 0	$ 0

Fair Value Measurements and D_5

Fair Value Measurements and Derivative Instruments - Summary of Effects on Consolidated Financial Statements of Designated As Cash Flow Hedges (Details) - Cash Flow Hedges - Designated - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Interest Rate Contracts
Derivative Instruments Gain Loss [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Income (Expense), Operating	Interest Income (Expense), Operating	Interest Income (Expense), Operating
(Loss) income recognized in Other comprehensive (loss) income	$ (13.3)	$ 36.1	$ 6.1
Net gain (loss) reclassified from Accumulated other comprehensive (loss) income into Interest expense, net	$ 11.1	$ 15.2	$ (0.5)
Fuel Swap Contracts
Derivative Instruments Gain Loss [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Goods and Services Sold	Cost of Goods and Services Sold	Cost of Goods and Services Sold
(Loss) income recognized in Other comprehensive (loss) income	$ (0.5)	$ 0	$ 0.2
Net gain (loss) reclassified from Accumulated other comprehensive (loss) income into Interest expense, net	$ 0	$ 0	$ 1.5

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Current:
Federal	$ 23.1	$ 22.7	$ 7.5
State	5.3	3.4	4.7
Deferred:
Federal	(0.8)	(22.4)	(3.7)
State	1.3	(4.2)	(2.9)
Valuation allowance	1.2	5.1	0
Total income tax (benefit) expense	$ 30.1	$ 4.6	$ 5.6

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Expense (Benefit) Differs from Amount Computed at Federal Statutory Corporate Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Federal tax at statutory rate	$ 20.3	$ (0.7)	$ 4.1
State tax, net of federal tax (benefit) expense	4.8	(0.8)	1.2
Tax effect of:
Equity-based compensation	0.9	0.9	0.6
Non-deductible officers compensation	1.3	1.1	0.7
Provision to return and deferred tax adjustments	0.3	(0.8)	(0.3)
Non-deductible promotional and entertainment expense	0.9	0.6	0.4
Fuel tax credit and other credits	(0.6)	(0.7)	(0.8)
Carryback claim, net of adjustments	0	(0.8)	(0.3)
Divestiture - Non-deductible goodwill	1.2	0	0
Rate changes	0.2	0.5	0
Valuation allowance	1.2	5.1	0
Other, net	(0.4)	0.2	0
Total income tax (benefit) expense	$ 30.1	$ 4.6	$ 5.6

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Asset and Liability Accounts (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Deferred tax assets:
Self-insurance reserves	$ 37.3	$ 31.8
Deferred compensation	2.2	2.8
Payroll related accruals	25.3	22.8
Allowance for doubtful accounts	2.5	1.3
Lease liabilities	22.3	23.6
Net operating loss carryforward	4.9	7.1
Business interest expense	17.2	10.4
Other non-current deferred tax assets	1.2	4.5
Total non-current deferred tax assets	112.9	104.3
Valuation allowance	(6.3)	(5.1)
Total deferred tax assets	106.6	99.2
Deferred tax liabilities:
Intangible assets	47.1	46.2
Property and equipment	63.2	57.3
Deferred revenue	16.6	15
Prepaid assets	0.1	0.2
Lease assets	20.7	22
Other non-current deferred tax liabilities	1.5	6
Total non-current deferred tax liabilities	149.2	146.7
Total net deferred tax liabilities	42.6	47.5
Classification on balance sheets:
Other assets	1.3	3.6
Deferred tax liabilities	$ 43.9	$ 51.1

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Taxes [Line Items]
Income tax benefit	$ (30.1)	$ (4.6)	$ (5.6)
Unrecognized tax benefits	0	0
Carryback claim refunded	0	(0.8)	(0.3)
Increase to the valuation allowance	1.2
Valuation allowance	$ 6.3	$ 5.1
State
Income Taxes [Line Items]
Tax examination	2019
Net operating losses	$ 90.9
Net operating losses, expiration start year	2025
Interest expense carryforward	$ 94.6
Valuation allowance	$ 6.3
U.S. federal
Income Taxes [Line Items]
Tax examination	2020
Interest expense carryforward	$ 58.4
Cares Act
Income Taxes [Line Items]
Income taxes receivable	39
Income tax benefit	10.1
Income tax credit related to employee retention	1		$ 3.3
Carryback claim refunded	$ 8.4

Leases - Additional Information

Leases - Additional Information (Details)	12 Months Ended
	Sep. 30, 2024
Leased Assets Line Items
Lease renewal option term	one or more exercisable renewal periods and specified increases in lease payments upon exercise of the renewal options.
Maximum
Leased Assets Line Items
Remaining lease terms	9 years 4 months 24 days
Minimum
Leased Assets Line Items
Remaining lease terms	1 month

Leases - Summary of Lease-Relat

Leases - Summary of Lease-Related Assets and Liabilities (Details) - USD ($) $ in Millions		Sep. 30, 2024	Sep. 30, 2023
Operating leases:
Right-of-use asset		$ 81.3	$ 86.1
Current portion of lease liabilities		24.9	27.3
Lease liabilities		62.6	65.1
Total operating lease liabilities		87.5	92.4
Finance leases:
Right-of-use asset	[1]	$ 67.7	$ 41.3
FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList		Property and equipment, net	Property and equipment, net
Current portion of lease liabilities	[2]	$ 37	$ 21.5
FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList		Accrued expenses and other current liabilities	Accrued expenses and other current liabilities
Lease liabilities	[3]	$ 31.2	$ 21.3
FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList		Other liabilities	Other liabilities
Total finance lease liabilities		$ 68.2	$ 42.8
[1] Included in “Property and equipment, net” in the Consolidated Balance Sheets. Included in “Accrued expenses and other liabilities” in the Consolidated Balance Sheets. Included in “Other liabilities” in the Consolidated Balance Sheets.

Leases - Summary of Weighted-av

Leases - Summary of Weighted-average Remaining Lease Terms and Incremental Borrowing Rates (Details)	Sep. 30, 2024	Sep. 30, 2023
Operating leases:
Weighted-average remaining lease term (years)	4 years 4 months 24 days	4 years 8 months 12 days
Weighted-average incremental borrowing rate	4.90%	4%
Finance leases:
Weighted-average remaining lease term (years)	2 years 4 months 24 days	2 years 4 months 24 days
Weighted-average incremental borrowing rate	5.90%	3.80%

Leases - Summary of Components

Leases - Summary of Components of Lease Cost for Operating and Finance Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating lease cost	$ 31.5	$ 32.1
Finance lease cost:
Amortization of right-of-use asset	34.7	27
Interest on lease liabilities	3.2	1.6
Total finance lease cost	37.9	28.6
Short-term lease cost	22.1	23.7
Variable lease costs not included in lease liability	3.8	3.3
Sublease income	(0.7)	(0.7)
Total lease cost	$ 94.6	$ 87

Leases - Summary of Supplementa

Leases - Summary of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 27.7	$ 28.9
Operating cash flows from finance leases	3.2	1.6
Financing cash flows from finance leases	36.3	27.6	$ 27
Non-cash items:
Right-of-use Assets Obtained In Exchange For New Operating Liabilities	27.1	33.4
Right-of-use Assets Obtained In Exchange For New Finance Liabilities	$ 65.4	$ 26.3

Leases - Summary of Maturities

Leases - Summary of Maturities of Operating and Finance Lease Liabilities (Details) - USD ($) $ in Millions		Sep. 30, 2024	Sep. 30, 2023
Operating Lease Liability, Payment Due [Abstract]
2025		$ 28.5
2026		23.4
2027		16.7
2028		11.5
2029		7.2
Thereafter		10.7
Total net lease payments		98
Less: Amounts representing interest		(10.5)
Total operating lease liabilities		87.5	$ 92.4
Less: Current portion of lease liabilities		(24.9)	(27.3)
Non-current lease liabilities		62.6	65.1
Finance Lease Liability, Payment Due [Abstract]
2025		40
2026		21.3
2027		7.1
2028		3.2
2029		1.3
Thereafter		0.2
Total net lease payments		73.1
Less: Amounts representing interest		(4.9)
Total finance lease liabilities		68.2	42.8
Less: Current portion of lease liabilities	[1]	(37)	(21.5)
Non-current lease liabilities	[2]	$ 31.2	$ 21.3
[1] Included in “Accrued expenses and other liabilities” in the Consolidated Balance Sheets. Included in “Other liabilities” in the Consolidated Balance Sheets.

Equity-Based Compensation - Add

Equity-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions					12 Months Ended
	Nov. 17, 2023	Nov. 14, 2022	May 17, 2022	Nov. 15, 2021	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 11, 2023	Mar. 10, 2020	Oct. 22, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares exercised					166,000
Equity-based compensation					$ 20.2	$ 22.1	$ 18.9
Unrecognized compensation cost					$ 30.6	$ 23.7	$ 36.2
Unamortized value of outstanding stock-based compensation, weighted average remaining life					1 year 2 months 12 days	1 year 2 months 12 days	1 year 2 months 12 days
Amended and Restated 2018 Omnibus Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock that may be issued									24,650,000
2023 Employment Inducement Incentive Award Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock that may be issued								1,750,000
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares available for sale										2,100,000
Common stock shares issued	188,000	177,000		112,000
Restricted Stock Units (RSU) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					4 years
Non-cash equity-based compensation expense over the requisite service period					$ 19.2
Stock options weighted average grant date fair value					$ 8.24
Number of shares exercised					1,285,000
Performance stock unit awards vested					1,285,000
RSUs Forfeited					689,000
Common stock shares issued					2,667,000
Performance stock units issued					2,667,000
Weighted average distribution price per share of PSU					$ 8.24
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-cash equity-based compensation expense over the requisite service period					$ 6.3
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average exercise price					$ 7.35
Performance stock unit awards vested					0
RSUs Forfeited					316,000
Performance stock units issued					918,000
Weighted average distribution price per share of PSU					$ 7.35
Performance Shares | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance Stock unit awards vesting rights percentage			0%
Performance Shares | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance Stock unit awards vesting rights percentage			200%

Equity-Based Compensation - Sum

Equity-Based Compensation - Summary of Company's Restricted Stock Award Activity (Details)	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 19.06
Exercised, Weighted Average Exercise Price	13.84
Forfeited, weighted average exercise price	19
Weighted Average Exercise Price, Outstanding at September 30, 2024	$ 19.37
Restricted Stock Awards
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Beginning balance, Outstanding | shares | shares	213,000
Forfeited | shares | shares	106,000
Ending balance, Outstanding | shares | shares	107,000
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 14.66
Forfeited, weighted average exercise price	14.66
Weighted Average Exercise Price, Outstanding at September 30, 2024	$ 14.66

Equity-Based Compensation - S_2

Equity-Based Compensation - Summary of Company's Restricted Stock Unit Activity (Details)	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 19.06
Forfeited, weighted average exercise price	19
Weighted Average Exercise Price, Outstanding at September 30, 2024	$ 19.37
Restricted Stock Units (RSU) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning balance, Outstanding | shares | shares	3,021,000
Granted | Shares | shares	2,667,000
Vested | Shares | shares	1,285,000
Forfeited | shares | shares	689,000
Ending balance, Outstanding | shares | shares	3,714,000
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 9.32
Granted, weighted average exercise price	8.24
Vested, weighted average exercise price	9.67
Forfeited, weighted average exercise price	8.92
Weighted Average Exercise Price, Outstanding at September 30, 2024	$ 8.5

Equity-Based Compensation - S_3

Equity-Based Compensation - Summary of Company's Stock Options Activity (Details)	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding at September 30, 2023 | shares	4,449,000
Exercised | shares | shares	166,000
Forfeited | Shares | shares	1,247,000
Outstanding at September 30, 2024 | shares	3,036,000
Vested and exercisable at September 30, 2024 | shares	2,527,000
Expected to vest after September 30, 2024 | shares	509,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Weighted Average Exercise Price, Outstanding at September 30, 2023 | $ / shares	$ 19.06
Exercised, Weighted Average Exercise Price | $ / shares	13.84
Forfeited, weighted average exercise price | $ / shares	19
Weighted Average Exercise Price, Outstanding at September 30, 2024 | $ / shares	19.37
Weighted Average Exercise Price, Vested and Exercisable at September 30, 2024 | $ / shares	19.33
Weighted Average Exercise Price, Expected to vest after September 30, 2024 | $ / shares	$ 19.54

Equity-Based Compensation - S_4

Equity-Based Compensation - Summary of Company's Performance Stock Unit Activity (Details)	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 19.06
Forfeited, weighted average exercise price	19
Weighted Average Exercise Price, Outstanding at September 30, 2024	$ 19.37
Performance Shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Beginning balance, Outstanding | shares | shares	512,000
Granted | Shares | shares	918,000
Forfeited | shares | shares	316,000
Ending balance, Outstanding | shares | shares	1,114,000
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 7.48
Granted, weighted average exercise price	7.35
Forfeited, weighted average exercise price	7.4
Weighted Average Exercise Price, Outstanding at September 30, 2024	$ 7.4

Equity-Based Compensation - Sch

Equity-Based Compensation - Schedule of Weighted-Average Assumptions Used in Valuation of Unit Awards, Restricted Stock Unit Awards Were Converted and Stock Option Awards Granted or Modified (Details)	12 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Risk-free interest rate	1.88%
Dividend yield	0%
Volatility factor	47.10%
Expected term (in years)	5 years 3 months 18 days

Commitment and Contingencies -

Commitment and Contingencies - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Commitments And Contingencies [Line Items]
Reserve for unpaid and incurred but not reported claims, amount	$ 165.6	$ 159.9
Reserve for unpaid and incurred but not reported claims, classified in current liabilities	52.8	54.8
Reserve for unpaid and incurred but not reported claims, classified in non-current liabilities	112.8	105.1
Claims recoverable from third party insurance carriers	13.4	18.1
Other Current Assets
Commitments And Contingencies [Line Items]
Claims recoverable from third party insurance carriers	4	5.3
Other Assets
Commitments And Contingencies [Line Items]
Claims recoverable from third party insurance carriers	$ 9.4	$ 12.8

Segments - Additional Informati

Segments - Additional Information (Details)	12 Months Ended
	Sep. 30, 2024 Segment
Segment Reporting [Abstract]
Number of operating segments	2

Segments - Summary of Certain F

Segments - Summary of Certain Financial Data For Each of Segments (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net Service Revenues		$ 2,767.1	$ 2,816	$ 2,774.6
Adjusted EBITDA	[1]	324.7	298.7	287.9
Capital Expenditures		78.4	71.3	107.3
Net Income (Loss)		66.4	(7.7)	14
Interest expense, net		62.4	97.4	53.3
Income tax expense		30.1	4.6	5.6
Depreciation expense		108.4	105.2	98.9
Amortization expense		35.8	44.5	51.5
Business transformation and integration costs	[2]	$ 44.1	$ 23.7	$ 21.5
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]		Gain (Loss) on Disposition of Business	Gain (Loss) on Disposition of Business	Gain (Loss) on Disposition of Business
Gain on divestiture	[3]	$ (43.6)	$ 0	$ 0.1
Equity-based compensation	[4]	20.5	22.3	19
COVID-19 related expenses	[5]	0	0.4	11.4
Debt extinguishment	[6]	0.6	8.3	12.6
Severance and related costs	[7]	16.6	8.9	1.6
Business integration	[8]	(0.4)	6.2	8.2
IT infrastructure, transformation, and other	[9]	27.9	8.6	11.7
Corporate
Segment Reporting Information [Line Items]
Adjusted EBITDA		(61.3)	(62)	(64.6)
Capital Expenditures		4.3	7	11.9
Operating Segments | Maintenance Services
Segment Reporting Information [Line Items]
Net Service Revenues		1,964	2,066.5	2,082
Adjusted EBITDA		279.7	277.9	278.8
Capital Expenditures		61.3	56.1	82.9
Operating Segments | Development Services
Segment Reporting Information [Line Items]
Net Service Revenues		808.8	758	698.8
Adjusted EBITDA		106.3	82.8	73.7
Capital Expenditures		12.8	8.2	12.5
Eliminations
Segment Reporting Information [Line Items]
Net Service Revenues		$ (5.7)	$ (8.5)	$ (6.2)
[1] Presented below is a reconciliation of Net (loss) income to Adjusted EBITDA: Business transformation and integration costs consist of (i) severance and related costs; (ii) business integration costs and (iii) information technology infrastructure, transformation and other costs. Represents the realized gain on sale and transaction related expenses from the divestiture of U.S. Lawns on January 12, 2024. Represents equity-based compensation expense and related taxes recognized for equity incentive plans outstanding . Represents expenses related to the Company’s response to the COVID-19 pandemic, principally temporary and incremental salary and related expenses, personal protective equipment, cleaning and supply purchases, and other. Additionally, fiscal year 2022 includes refunds related to employee retention credits allowed under the CARES Act. Represents losses on the extinguishment of debt related to Amendments No. 6, No. 7, and No. 8 to the Credit Agreement, in the fiscal years ended September 30, 2022, 2023, and 2024 respectively, and includes accelerated amortization of deferred financing fees and original issue discount as well as fees paid to lenders and third parties. Represents severance and related costs incurred in connection with the Company's One BrightView initiative and CEO transition. Represents isolated expenses specifically related to the integration of acquired companies such as one-time employee retention costs, employee onboarding and training costs, fleet and uniform rebranding costs, and adjustments to performance based contingent consideration. The Company excludes Business integration costs from the non-GAAP measures disclosed above since such expenses vary in amount due to the number of acquisitions and size of acquired companies as well as factors specific to each acquisition, and as a result lack predictability as to occurrence and/or timing, and create a lack of comparability between periods. Represents expenses related to distinct initiatives, typically significant enterprise-wide changes. Such expenses are excluded from the measures disclosed above since such expenses vary in amount based on occurrence as well as factors specific to each of the activities, are outside of the normal operations of the business, and create a lack of comparability between periods.

Mezzanine Equity - Additional I

Mezzanine Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Aug. 28, 2023
Class of Stock [Line Items]
Preferred stock, issued	0	0
Preferred stock, par value	$ 0.01	$ 0.01
Preferred Stock, net of issuance costs	$ 0	$ 0
Common Stock
Class of Stock [Line Items]
Dividend issued to common stockholders	$ 0	$ 0
Series A Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, issued	500,000	500,000		500,000
Preferred stock, par value	$ 0.01	$ 0.01		$ 0.01
Aggregate purchase price				$ 500
Preferred Stock, net of issuance costs				$ 5
Preferred stock, liquidation preference	$ 512	$ 503.2
Dividend rate	7%	7%	7%
Dividends paid in-kind	$ 8.9
Cash dividend	26.8
Cash dividends paid	17.8
Accrued dividends	$ 9
Terms of redemption	(A) if the applicable redemption date is on or after the fourth anniversary of the Original Issuance Date and before the fifth anniversary of the Original Issuance Date, the greater of (1) the product of (x) the sum of (I) the liquidation preference of such shares of Series A Preferred Stock to be redeemed, plus (II) the accrued dividends in respect of such share of Series A Preferred Stock to be redeemed as of such redemption date, multiplied by (y) 105% and (2) the volume weighted average price (“VWAP”) of the average of the Common Stock for each of the 10 consecutive full trading days ending on, and including, the trading day immediately preceding such day of measurement, adjusted pursuant to the Certificate of Designations (the “Current Market Price”) as of such redemption date of the Common Stock into which such shares of Series A Preferred Stock could be converted on an as converted basis; (B) if the applicable redemption date is on or after the fifth anniversary of the Original Issuance Date and before the sixth anniversary of the Original Issuance Date, the greater of (1) the product of (x) the sum of (I) the liquidation preference of such share of Series A Preferred Stock to be redeemed, plus (II) the accrued dividends in respect of such share of Series A Preferred Stock to be redeemed, multiplied by (y) 103% and (2) the Current Market Price as of such redemption date of the Common Stock into which such shares of Series A Preferred Stock could be converted on an as converted basis; and (C) if the applicable redemption date is on or after the sixth anniversary of the Original Issuance Date, the greater of (1) the product of (x) the sum of (I) the liquidation preference of such share of Series A Preferred Stock to be redeemed, plus (II) the accrued dividends in respect of such share of Series A Preferred Stock to be redeemed , multiplied by (y) 100% and (2) the Current Market Price as of such redemption date of the Common Stock into which such shares of Series A Preferred Stock could be converted on an as converted basis.
Conversion rate			105.9322
Initial conversion price of common stock	$ 18.88
Common stock, affiliates holding percentage	49%

Earnings (Loss) Per Share of _3

Earnings (Loss) Per Share of Common Stock - Reconciliation of Numerator and Denominator for Basic and Diluted (Loss) Earnings Per Share Calculation (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net Income (Loss)		$ 66.4	$ (7.7)	$ 14
Less: dividends on Series A convertible preferred shares		(35.7)	(3.2)	0
Less: Earnings allocated to Convertible Preferred Shares		(11.2)	0	0
Net income (loss) available to common shareholders		$ 19.5	$ (10.9)	$ 14
Weighted average number of common shares outstanding – basic		94,673,000	93,412,000	97,898,000
Basic earnings (loss) per share		$ 0.21	$ (0.12)	$ 0.14
Net income (loss) available to common shareholders - diluted		$ 19.5	$ (10.9)	$ 14
Stock compensation awards		1,403,000	0	263,000
Weighted average number of common shares outstanding - diluted		96,076,000	93,412,000	98,161,000
Diluted earnings (loss) per share		$ 0.2	$ (0.12)	$ 0.14
Weighted average number of anti-dilutive Series A convertible preferred shares, options and restricted stock(a)	[1]	56,587,000	9,656,000	5,010,000
[1] Weighted average number of anti-dilutive options is based upon the average closing price of the Company’s common stock on the NYSE for the period.

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - Segment	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024
Subsequent Event [Line Items]
Number of reportable segments		2
Subsequent Event
Subsequent Event [Line Items]
Number of reportable segments	2