Significant Accounting Policies (Policies)	12 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). The accompanying consolidated financial statements include our accounts and those of our controlled subsidiaries. Intercompany transactions and account balances have been eliminated in consolidation. Investments we do not control, but can exercise significant influence over, are accounted for using the equity method of accounting (see further discussion below). We also own an undivided interest in a crude oil pipeline, and include our proportionate share of assets, liabilities, and expenses related to this pipeline in our consolidated financial statements.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amount of assets and liabilities reported at the date of the consolidated financial statements and the amount of revenues and expenses reported during the periods presented. Critical accounting estimates we make in the preparation of our consolidated financial statements include, among others, determining the impairment of goodwill and long-lived assets, useful lives and recoverability of property, plant and equipment and amortizable intangible assets, the fair value of derivative instruments, estimating certain revenues, the fair value of asset retirement obligations, the fair value of assets and liabilities acquired in acquisitions, the recoverability of inventories, the collectability of accounts and notes receivable, the valuation of contingent consideration liabilities and accruals for environmental matters. Although we believe these estimates are reasonable, actual results could differ from those estimates.
Fair Value Measurements	Fair Value Measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. Fair value is based upon assumptions that market participants would use when pricing an asset or liability. We use the following fair value hierarchy, which prioritizes valuation technique inputs used to measure fair value into three broad levels: •Level 1: Quoted prices in active markets for identical assets and liabilities that we have the ability to access at the measurement date. •Level 2: Inputs (other than quoted prices included within Level 1) that are either directly or indirectly observable for the asset or liability, including (i) quoted prices for similar assets or liabilities in active markets, (ii) quoted prices for identical or similar assets or liabilities in inactive markets, (iii) inputs other than quoted prices that are observable for the asset or liability, and (iv) inputs that are derived from observable market data by correlation or other means. Instruments categorized in Level 2 include non-exchange traded derivative financial instruments such as over-the-counter commodity price swap and option contracts and forward commodity contracts. We determine the fair value of all of our derivative financial instruments utilizing pricing models for similar instruments. Inputs to the pricing models include publicly available prices and forward curves generated from a compilation of data gathered from third parties. •Level 3: Unobservable inputs for the asset or liability including situations where there is little, if any, market activity for the asset or liability. The fair value hierarchy gives the highest priority to quoted prices in active markets (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall into different levels of the fair value hierarchy. The lowest level input that is significant to a fair value measurement determines the applicable level in the fair value hierarchy. Assessing the significance of a particular input to a fair value measurement requires judgment, considering factors specific to the asset or liability.
Derivative Financial Instruments	Derivative Financial Instruments We record all derivative financial instrument contracts at fair value in our consolidated balance sheets except for normal purchase and normal sale transactions that are expected to result in physical delivery. For these transactions, we do not record the physical contracts at fair value at each balance sheet date; instead, we record the purchase or sale at the contracted value once the delivery occurs. We periodically enter into interest rate swaps to hedge variability in interest rates and effectively lock in the benchmark interest rate at the inception of the swap. We have not designated any financial instruments as hedges for accounting purposes. All changes in the fair value of our physical contracts that do not qualify as normal purchases and normal sales and settlements (whether cash transactions or non-cash mark-to-market adjustments) are reported within cost of sales-product (for purchase contracts) in our consolidated statements of operations, regardless of whether the contract is physically or financially settled, and within cash flows from operations in our consolidated statements of cash flows. The change in the fair value of our interest rate swaps is recorded as a net gain or loss within interest expense in our consolidated statement of operations and within cash flows from operations in our consolidated statements of cash flows. We utilize various commodity derivative financial instrument contracts to attempt to reduce our exposure to price fluctuations. We do not enter into such contracts for trading purposes. Changes in assets and liabilities from commodity derivative financial instruments result primarily from changes in market prices, newly originated transactions, and the timing of settlements and are reported within cost of sales-product on the consolidated statements of operations, along with related settlements. We attempt to balance our contractual portfolio in terms of notional amounts and timing of performance and delivery obligations. However, net unbalanced positions can exist or are established based on our assessment of anticipated market movements. Inherent in the resulting contractual portfolio are certain business risks, including commodity price risk and credit risk. Commodity price risk is the risk that the market value of crude oil or natural gas liquids will change, either favorably or unfavorably, in response to changing market conditions. Credit risk is the risk of loss from nonperformance by suppliers, customers or financial counterparties to a contract. Procedures and limits for managing commodity price risks and credit risks are specified in our market risk policy and credit policy, respectively. Open commodity positions and market price changes are monitored daily and are reported to senior management and to marketing operations personnel. Credit risk is monitored daily and exposure is minimized through customer deposits, letters of credit, monitoring customer receivables relative to previously-approved credit limits, restrictions on product liftings, entering into master netting agreements that allow for offsetting counterparty receivable and payable balances for certain transactions, reviewing the receivable aging and suspending sales to customers that have not timely paid outstanding invoices.
Cost of Sales	Cost of Sales We include all costs we incur to acquire products, including the costs of purchasing, terminaling, and transporting inventory, prior to delivery to our customers, in cost of sales.
Depreciation and Amortization	Depreciation and Amortization Depreciation and amortization in our consolidated statements of operations includes all depreciation of our property, plant and equipment and amortization of intangible assets other than debt issuance costs, for which the amortization is recorded to interest expense and certain contract-based intangible assets, for which the amortization is recorded to cost of sales-product, cost of sales-service or operating expense.
Income Taxes	Income Taxes We qualify as a partnership for income tax purposes. As such, we generally do not pay federal income tax. Rather, each owner reports his or her share of our income or loss on his or her individual tax return. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined, as we do not have access to information regarding each partner’s basis in the Partnership. We have certain taxable corporate subsidiaries in the United States and Canada, and our operations in Texas are subject to a state franchise tax that is calculated based on revenues net of cost of sales. Our fiscal years 2022 to 2025 generally remain subject to examination by federal, state, and Canadian tax authorities. We utilize the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying value of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply in the years in which these temporary differences are expected to be recovered or settled. Changes in tax rates are recognized in income in the period that includes the enactment date. A publicly traded partnership is required to generate at least 90% of its gross income (as defined for federal income tax purposes) from certain qualifying sources. Income generated by our taxable corporate subsidiaries is excluded from this qualifying income calculation. Although we routinely generate income outside of our corporate subsidiaries that is non-qualifying, we believe that at least 90% of our gross income has been qualifying income for each of the calendar years since our initial public offering. We have a corporate subsidiary with a deferred tax liability of $28.5 million and $29.9 million at March 31, 2026 and 2025, respectively, in connection with certain of our acquisitions, which is included within other noncurrent liabilities in our consolidated balance sheets. The deferred tax liability is primarily the tax effected cumulative temporary difference between the GAAP basis and tax basis of the acquired assets within the corporation. For GAAP purposes, certain of the acquired assets will be depreciated and amortized over time which will lower the GAAP basis. The deferred tax benefit recorded during the year ended March 31, 2026 was $1.5 million with an effective tax rate of 21.0%. The deferred tax benefit recorded during the year ended March 31, 2025 was $7.1 million with an effective tax rate of 133.4%. The change in the effective tax rate from March 31, 2025 to March 31, 2026 was due to the sale of our ranches in April 2024 and the associated net deferred tax liabilities. We evaluate uncertain tax positions for recognition and measurement in the consolidated financial statements. To recognize a tax position, we determine whether it is more likely than not that the tax position will be sustained upon examination, including resolution of any related appeals or litigation, based on the technical merits of the position. A tax position that meets the more likely than not threshold is measured to determine the amount of benefit to be recognized in the consolidated financial statements. We had no uncertain tax positions that required recognition in our consolidated financial statements at March 31, 2026 or 2025. On July 4, 2025, the One Big Beautiful Bill Act (“Act”) was signed into law by the President of the United States. The Act makes permanent many provisions of the expiring Tax Cuts and Jobs Act of 2017, and enacts new tax laws effective primarily in 2025 or 2026. The Act permanently reinstates 100% bonus depreciation for qualifying property acquired after January 19, 2025, and permanently extends the 20% deduction for qualified business income. The Act also makes permanent the modified calculation of adjusted taxable income that corresponds with earnings before interest, taxes depreciation, and amortization (EBITDA) for the purpose of calculating the deduction limits for net business interest expense. This change applies to taxable years beginning after December 31, 2024. The provisions of the Act did not have a material impact to our financial statements.
Cash and Cash Equivalents	Cash and Cash Equivalents Management considers all highly liquid investments with a maturity of three months or less, when purchased, to be cash equivalents. We place our cash and cash equivalents with financial institutions that are insured by the Federal Deposit Insurance Corporation; however, we maintain deposits in banks which exceed the amount of deposit insurance available. Management routinely assesses the financial condition of the institutions and believes that any possible credit loss would be minimal.
Accounts Receivable and Concentration of Credit Risk	Accounts Receivable and Concentration of Credit Risk We operate in the United States and Canada. We grant unsecured credit to customers under normal industry standards and terms, and have established policies and procedures that allow for an evaluation of each customer’s creditworthiness as well as general economic conditions. Accounts receivable are generated through transactions accounted for under the guidance of contracts with customers (ASC 606), leases (ASC 842) and non-monetary transactions (ASC 845). See Note 16 for a further discussion of our allowance for expected credit losses. We execute master netting agreements with certain customers to mitigate our credit risk. Receivables and payables are reflected at a net balance to the extent a master netting agreement is in place and we intend to settle on a net basis. We did not have any customers that represented over 10% of our consolidated revenues for the years ended March 31, 2026, 2025 and 2024.
Inventories	Inventories Our inventories are valued at the lower of cost or net realizable value, with cost determined using the weighted average cost method, including the cost of transportation and storage, and with net realizable value defined as the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. In performing this analysis, we consider fixed-price forward commitments.
Investments in Unconsolidated Entities	Investments in Unconsolidated Entities Investments we do not control, but can exercise significant influence over, are accounted for using the equity method of accounting. Investments in partnerships and limited liability companies, unless our investment is considered to be minor, and investments in unincorporated joint ventures are also accounted for using the equity method of accounting.
Property, Plant and Equipment	Property, Plant and Equipment We record property, plant and equipment at cost less accumulated depreciation. Acquisitions and improvements are capitalized, and maintenance and repairs are expensed as incurred. As we dispose of assets, we remove the cost and related accumulated depreciation from the accounts, and any resulting gain or loss is included within loss on disposal or impairment of assets, net. We compute depreciation expense of our property, plant and equipment using the straight-line method over the estimated useful lives of the assets (see Note 4).
Intangible Assets	Intangible Assets Our intangible assets include contracts and arrangements acquired in business combinations, including customer relationships, customer commitments, rights-of-way and easements and executory contracts and other agreements. In addition, we capitalize certain debt issuance costs associated with the ABL Facility (as defined herein). We amortize the majority of our intangible assets on a straight-line basis over the estimated useful lives of the assets (see Note 6). We amortize debt issuance costs over the terms of the related debt using a method that approximates the effective interest method.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets We evaluate the carrying value of our long-lived assets (property, plant and equipment and amortizable intangible assets) for potential impairment when events and circumstances warrant such a review. A long-lived asset group is considered impaired when the anticipated undiscounted future cash flows from the use and eventual disposition of the asset group is less than its carrying value. If the carrying value is not recoverable, an impairment loss is measured as the excess of the asset’s carrying value over its estimated fair value. When we cease to use an acquired trade name, we test the trade name for impairment using the relief from royalty method and we begin amortizing the trade name over its estimated useful life as a defensive asset. See Note 4 and Note 6 for a further discussion of long-lived asset impairments recognized in the consolidated statements of operations.
Goodwill	Goodwill Goodwill represents the excess of the purchase price of the acquired businesses over the net fair value of acquired assets and assumed liabilities. Business combinations are accounted for using the “acquisition method.” We expect that all of our goodwill at March 31, 2026 is deductible for federal income tax purposes. Goodwill and indefinite-lived intangible assets are not amortized, but instead are evaluated for impairment at least annually. We perform our annual assessment of impairment on January 1 of our fiscal year, and more frequently if circumstances warrant. For purposes of the goodwill impairment assessment, assets are grouped into “reporting units.” A reporting unit is either an operating segment or a component of an operating segment, depending on how similar the components of the operating segment are to each other in terms of operational and economic characteristics. For each reporting unit, we perform a qualitative assessment of relevant events and circumstances about the likelihood of goodwill impairment. If it is deemed more likely than not that the fair value of the reporting unit is less than its carrying value, we calculate the fair value of the reporting unit. Otherwise, further testing is not required. If the fair value of the reporting unit (including its inherent goodwill) is less than its carrying value, an impairment loss is recognized to the extent that the implied fair value of the goodwill of the reporting unit is less than its carrying value, limited to the total amount of goodwill for the reporting unit. Estimates and assumptions used to perform the impairment evaluation are inherently uncertain and can significantly affect the outcome of the analysis. The estimates and assumptions we used in the annual goodwill impairment assessment included market participant considerations and future forecasted operating results. Changes in operating results and other assumptions could materially affect these estimates. See Note 5 for a further discussion and analysis of our goodwill impairment assessment.
Product Exchanges	Product Exchanges Quantities of products receivable or returnable under exchange agreements are reported within prepaid expenses and other current assets and within accrued expenses and other payables in our consolidated balance sheets. We estimate the value of product exchange assets and liabilities based on the weighted average cost basis of the inventory we have delivered or will deliver on the exchange, plus or minus location differentials.
Variable Interest Entities	Variable Interest Entities We decide at the inception of each arrangement whether an entity in which an investment is made or in which we have other variable interests is considered a variable interest entity (“VIE”). Generally, an entity is a VIE if: (1) the entity does not have sufficient equity at risk to finance its activities without additional subordinated financial support from other parties, (2) the entity’s investors lack any characteristics of a controlling financial interest or (3) the entity was established with non-substantive voting rights. We consolidate VIEs when we are deemed to be the primary beneficiary. The primary beneficiary of a VIE is generally the party that both: (1) has the power to make decisions that most significantly affect the economic performance of the VIE and (2) has the obligation to absorb losses or the right to receive benefits that in either case could potentially be significant to the VIE. If we are not deemed to be the primary beneficiary of a VIE, we account for the investment or other variable interests in a VIE in accordance with applicable GAAP.
Noncontrolling Interests	Noncontrolling Interests Noncontrolling interests represent the portion of certain consolidated subsidiaries that are owned by third-parties. Amounts are adjusted by the noncontrolling interest holder’s proportionate share of the subsidiaries’ earnings or losses each period and any distributions that are paid. Noncontrolling interests are reported as a component of equity, unless the noncontrolling interest is considered redeemable, in which case the noncontrolling interest is recorded between liabilities and equity (mezzanine or temporary equity) in our consolidated balance sheet. The redeemable noncontrolling interest is adjusted at each balance sheet date to its maximum redemption value if the amount is greater than the carrying value.
Acquisitions and Contingent Consideration Liabilities	Acquisitions To determine if a transaction should be accounted for as a business combination or an acquisition of assets, we first calculate the relative fair values of the assets acquired. If substantially all of the relative fair value is concentrated in a single asset or group of similar assets, or if not but the transaction does not include a significant process (does not meet the definition of a business), we record the transaction as an acquisition of assets. For acquisitions of assets, the purchase price is allocated based on the relative fair values and goodwill is not recorded. All other transactions are recorded as business combinations. We record the assets acquired and liabilities assumed in a business combination at their acquisition date fair values. For a business combination, the excess of the purchase price over the net fair value of acquired assets and assumed liabilities is recorded as goodwill, which is not amortized but instead is evaluated for impairment at least annually (as described above). Pursuant to GAAP, an entity is allowed a reasonable period of time (not to exceed one year) to obtain the information necessary to identify and measure the fair value of the assets acquired and liabilities assumed in a business combination. Contingent Consideration Liabilities Certain business combinations in our Water Solutions segment included future royalty payments to the seller, which we recorded as contingent consideration liabilities as part of our purchase price allocation. The initial fair value was calculated based on an estimate of the activity related to the assets acquired in the transaction, either volumes or revenue, and an estimate of the expected useful life of the assets and discounted to its present value using an appropriate discount rate. The contingent consideration liabilities are recorded within accrued expenses and other payables and other noncurrent liabilities in our consolidated balance sheets. The fair value of the contingent consideration liabilities is assessed each reporting period to determine if there are any changes to the estimated expected activity and the expected useful life of the assets. The same process to calculate the initial fair value of the contingent consideration liabilities is used to calculate the updated fair value. Changes in the fair value of the contingent consideration liabilities are recorded within revaluation of liabilities in our consolidated statement of operations. The fair value estimates used in the analysis of the contingent consideration liabilities were primarily based on Level 3 inputs in the fair value hierarchy.
Reclassifications	Reclassifications During the three months ended March 31, 2026, we identified a misclassification related to amounts recorded within inventories that should have been recorded as linefill within property, plant and equipment in prior periods. To correct the misclassification in the current period financial statements, we adjusted our March 31, 2026 consolidated balance sheet by reducing inventories by approximately $11.0 million and increasing linefill within property, plant and equipment by approximately $7.0 million. The difference of $4.0 million represents the change in the value of the inventory from the period when it should have been classified as linefill and has been recorded within cost of sales-product in our consolidated statement of operations. We concluded that the misclassification was not material to any of our prior period financial statements, and accordingly the prior periods presented herein have not been adjusted, as the value of inventories was approximately $9.2 million as of March 31, 2025 and the change in the value was approximately $2.2 million.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In December 2025, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements for Interim Reporting, which amends ASC 270 to provide clarity on the current interim reporting requirements. The ASU improves the navigability of the required interim disclosures and clarifying when that guidance is applicable, provides additional guidance on what disclosures should be provided in interim reporting periods and adds to ASC 270 a principle that requires entities to disclose events since the end of the last annual reporting period that have a material impact on the entity. The ASU is effective for fiscal years beginning after December 15, 2027 (which is the Partnership’s fiscal year beginning April 1, 2028), and for interim periods within those fiscal years, with early adoption permitted. The amendments should be applied either prospectively or retrospectively to all prior periods presented in the financial statements. We are currently evaluating the ASU to determine its impact on our financial statement disclosures. In July 2025, the FASB issued ASU 2025-05, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, which amends ASC 326-20 to provide a practical expedient for all entities when estimating expected credit losses for current accounts receivable and current contract assets that arise from transactions accounted for under ASC 606. The practical expedient assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. The ASU is effective for fiscal years beginning after December 15, 2025 (which is the Partnership’s fiscal year beginning April 1, 2026), and for interim periods within those fiscal years, with early adoption permitted. The amendments should be applied prospectively. We adopted this ASU beginning with the September 30, 2025 Quarterly Report on Form 10-Q. The adoption of this ASU did not impact our financial statements. In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which includes amendments requiring, among other things, disclosure of disaggregated information about specific categories of expenses (purchases of inventory, employee compensation, depreciation, amortization, and depletion) included in certain expense captions on the income statement. Additionally, the amendments require disclosure of the total amount of selling expenses and an annual disclosure of the definition of selling expenses. The ASU is effective for fiscal years beginning after December 15, 2026 (which is the Partnership’s fiscal year beginning April 1, 2027), and for interim periods within fiscal years beginning after December 15, 2027 (which is the Partnership’s fiscal year beginning April 1, 2028), with early adoption permitted. The ASU may be applied either prospectively or retrospectively to all prior periods presented in the financial statements. We are currently evaluating the ASU to determine its impact on our financial statement disclosures. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which includes amendments that further enhance income tax disclosures, primarily through standardization and disaggregation of rate reconciliation categories and income taxes paid by jurisdiction. The ASU is effective for the Partnership’s fiscal year beginning April 1, 2025, with early adoption permitted. The amendments are required to be applied prospectively with retrospective application permitted. We adopted this ASU for the fiscal year ended March 31, 2026, and applied the amendments prospectively.

Significant Accounting Policies (Policies)

12 Months Ended

Mar. 31, 2026

Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). The accompanying consolidated financial statements include our accounts and those of our controlled subsidiaries. Intercompany transactions and account balances have been eliminated in consolidation. Investments we do not control, but can exercise significant influence over, are accounted for using the equity method of accounting (see further discussion below). We also own an undivided interest in a crude oil pipeline, and include our proportionate share of assets, liabilities, and expenses related to this pipeline in our consolidated financial statements.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amount of assets and liabilities reported at the date of the consolidated financial statements and the amount of revenues and expenses reported during the periods presented.

Critical accounting estimates we make in the preparation of our consolidated financial statements include, among others, determining the impairment of goodwill and long-lived assets, useful lives and recoverability of property, plant and equipment and amortizable intangible assets, the fair value of derivative instruments, estimating certain revenues, the fair value of asset retirement obligations, the fair value of assets and liabilities acquired in acquisitions, the recoverability of inventories, the collectability of accounts and notes receivable, the valuation of contingent consideration liabilities and accruals for environmental matters. Although we believe these estimates are reasonable, actual results could differ from those estimates.

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. Fair value is based upon assumptions that market participants would use when pricing an asset or liability. We use the following fair value hierarchy, which prioritizes valuation technique inputs used to measure fair value into three broad levels:

•Level 1: Quoted prices in active markets for identical assets and liabilities that we have the ability to access at the measurement date.

•Level 2: Inputs (other than quoted prices included within Level 1) that are either directly or indirectly observable for the asset or liability, including (i) quoted prices for similar assets or liabilities in active markets, (ii) quoted prices for identical or similar assets or liabilities in inactive markets, (iii) inputs other than quoted prices that are observable for the asset or liability, and (iv) inputs that are derived from observable market data by correlation or other means. Instruments categorized in Level 2 include non-exchange traded derivative financial instruments such as over-the-counter commodity price swap and option contracts and forward commodity contracts. We determine the fair value of all of our derivative financial instruments utilizing pricing models for similar instruments. Inputs to the pricing models include publicly available prices and forward curves generated from a compilation of data gathered from third parties.

•Level 3: Unobservable inputs for the asset or liability including situations where there is little, if any, market activity for the asset or liability.

The fair value hierarchy gives the highest priority to quoted prices in active markets (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall into different levels of the fair value hierarchy. The lowest level input that is significant to a fair value measurement determines the applicable level in the fair

value hierarchy. Assessing the significance of a particular input to a fair value measurement requires judgment, considering factors specific to the asset or liability.

Derivative Financial Instruments

We record all derivative financial instrument contracts at fair value in our consolidated balance sheets except for normal purchase and normal sale transactions that are expected to result in physical delivery. For these transactions, we do not record the physical contracts at fair value at each balance sheet date; instead, we record the purchase or sale at the contracted value once the delivery occurs. We periodically enter into interest rate swaps to hedge variability in interest rates and effectively lock in the benchmark interest rate at the inception of the swap.

We have not designated any financial instruments as hedges for accounting purposes. All changes in the fair value of our physical contracts that do not qualify as normal purchases and normal sales and settlements (whether cash transactions or non-cash mark-to-market adjustments) are reported within cost of sales-product (for purchase contracts) in our consolidated statements of operations, regardless of whether the contract is physically or financially settled, and within cash flows from operations in our consolidated statements of cash flows. The change in the fair value of our interest rate swaps is recorded as a net gain or loss within interest expense in our consolidated statement of operations and within cash flows from operations in our consolidated statements of cash flows.

We utilize various commodity derivative financial instrument contracts to attempt to reduce our exposure to price fluctuations. We do not enter into such contracts for trading purposes. Changes in assets and liabilities from commodity derivative financial instruments result primarily from changes in market prices, newly originated transactions, and the timing of settlements and are reported within cost of sales-product on the consolidated statements of operations, along with related settlements. We attempt to balance our contractual portfolio in terms of notional amounts and timing of performance and delivery obligations. However, net unbalanced positions can exist or are established based on our assessment of anticipated market movements. Inherent in the resulting contractual portfolio are certain business risks, including commodity price risk and credit risk. Commodity price risk is the risk that the market value of crude oil or natural gas liquids will change, either favorably or unfavorably, in response to changing market conditions. Credit risk is the risk of loss from nonperformance by suppliers, customers or financial counterparties to a contract. Procedures and limits for managing commodity price risks and credit risks are specified in our market risk policy and credit policy, respectively. Open commodity positions and market price changes are monitored daily and are reported to senior management and to marketing operations personnel. Credit risk is monitored daily and exposure is minimized through customer deposits, letters of credit, monitoring customer receivables relative to previously-approved credit limits, restrictions on product liftings, entering into master netting agreements that allow for offsetting counterparty receivable and payable balances for certain transactions, reviewing the receivable aging and suspending sales to customers that have not timely paid outstanding invoices.

Cost of Sales

We include all costs we incur to acquire products, including the costs of purchasing, terminaling, and transporting inventory, prior to delivery to our customers, in cost of sales.

Depreciation and Amortization

Depreciation and amortization in our consolidated statements of operations includes all depreciation of our property, plant and equipment and amortization of intangible assets other than debt issuance costs, for which the amortization is recorded to interest expense and certain contract-based intangible assets, for which the amortization is recorded to cost of sales-product, cost of sales-service or operating expense.

Income Taxes

We qualify as a partnership for income tax purposes. As such, we generally do not pay federal income tax. Rather, each owner reports his or her share of our income or loss on his or her individual tax return. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined, as we do not have access to information regarding each partner’s basis in the Partnership.

We have certain taxable corporate subsidiaries in the United States and Canada, and our operations in Texas are subject to a state franchise tax that is calculated based on revenues net of cost of sales. Our fiscal years 2022 to 2025 generally remain subject to examination by federal, state, and Canadian tax authorities. We utilize the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax

consequences attributable to differences between the financial statement carrying value of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply in the years in which these temporary differences are expected to be recovered or settled. Changes in tax rates are recognized in income in the period that includes the enactment date.

A publicly traded partnership is required to generate at least 90% of its gross income (as defined for federal income tax purposes) from certain qualifying sources. Income generated by our taxable corporate subsidiaries is excluded from this qualifying income calculation. Although we routinely generate income outside of our corporate subsidiaries that is non-qualifying, we believe that at least 90% of our gross income has been qualifying income for each of the calendar years since our initial public offering.

We have a corporate subsidiary with a deferred tax liability of $28.5 million and $29.9 million at March 31, 2026 and 2025, respectively, in connection with certain of our acquisitions, which is included within other noncurrent liabilities in our consolidated balance sheets. The deferred tax liability is primarily the tax effected cumulative temporary difference between the GAAP basis and tax basis of the acquired assets within the corporation. For GAAP purposes, certain of the acquired assets will be depreciated and amortized over time which will lower the GAAP basis. The deferred tax benefit recorded during the year ended March 31, 2026 was $1.5 million with an effective tax rate of 21.0%. The deferred tax benefit recorded during the year ended March 31, 2025 was $7.1 million with an effective tax rate of 133.4%. The change in the effective tax rate from March 31, 2025 to March 31, 2026 was due to the sale of our ranches in April 2024 and the associated net deferred tax liabilities.

We evaluate uncertain tax positions for recognition and measurement in the consolidated financial statements. To recognize a tax position, we determine whether it is more likely than not that the tax position will be sustained upon examination, including resolution of any related appeals or litigation, based on the technical merits of the position. A tax position that meets the more likely than not threshold is measured to determine the amount of benefit to be recognized in the consolidated financial statements. We had no uncertain tax positions that required recognition in our consolidated financial statements at March 31, 2026 or 2025.

On July 4, 2025, the One Big Beautiful Bill Act (“Act”) was signed into law by the President of the United States. The Act makes permanent many provisions of the expiring Tax Cuts and Jobs Act of 2017, and enacts new tax laws effective primarily in 2025 or 2026. The Act permanently reinstates 100% bonus depreciation for qualifying property acquired after January 19, 2025, and permanently extends the 20% deduction for qualified business income. The Act also makes permanent the modified calculation of adjusted taxable income that corresponds with earnings before interest, taxes depreciation, and amortization (EBITDA) for the purpose of calculating the deduction limits for net business interest expense. This change applies to taxable years beginning after December 31, 2024. The provisions of the Act did not have a material impact to our financial statements.

Cash and Cash Equivalents

Management considers all highly liquid investments with a maturity of three months or less, when purchased, to be cash equivalents. We place our cash and cash equivalents with financial institutions that are insured by the Federal Deposit Insurance Corporation; however, we maintain deposits in banks which exceed the amount of deposit insurance available. Management routinely assesses the financial condition of the institutions and believes that any possible credit loss would be minimal.

Accounts Receivable and Concentration of Credit Risk

We operate in the United States and Canada. We grant unsecured credit to customers under normal industry standards and terms, and have established policies and procedures that allow for an evaluation of each customer’s creditworthiness as well as general economic conditions. Accounts receivable are generated through transactions accounted for under the guidance of contracts with customers (ASC 606), leases (ASC 842) and non-monetary transactions (ASC 845). See Note 16 for a further discussion of our allowance for expected credit losses.

We execute master netting agreements with certain customers to mitigate our credit risk. Receivables and payables are reflected at a net balance to the extent a master netting agreement is in place and we intend to settle on a net basis.

We did not have any customers that represented over 10% of our consolidated revenues for the years ended March 31, 2026, 2025 and 2024.

Inventories

Our inventories are valued at the lower of cost or net realizable value, with cost determined using the weighted average cost method, including the cost of transportation and storage, and with net realizable value defined as the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. In performing this analysis, we consider fixed-price forward commitments.

Investments in Unconsolidated Entities

Investments we do not control, but can exercise significant influence over, are accounted for using the equity method of accounting. Investments in partnerships and limited liability companies, unless our investment is considered to be minor, and investments in unincorporated joint ventures are also accounted for using the equity method of accounting.

Property, Plant and Equipment

We record property, plant and equipment at cost less accumulated depreciation. Acquisitions and improvements are capitalized, and maintenance and repairs are expensed as incurred. As we dispose of assets, we remove the cost and related accumulated depreciation from the accounts, and any resulting gain or loss is included within loss on disposal or impairment of assets, net. We compute depreciation expense of our property, plant and equipment using the straight-line method over the estimated useful lives of the assets (see Note 4).

Intangible Assets

Our intangible assets include contracts and arrangements acquired in business combinations, including customer relationships, customer commitments, rights-of-way and easements and executory contracts and other agreements. In addition, we capitalize certain debt issuance costs associated with the ABL Facility (as defined herein). We amortize the majority of our intangible assets on a straight-line basis over the estimated useful lives of the assets (see Note 6). We amortize debt issuance costs over the terms of the related debt using a method that approximates the effective interest method.

Impairment of Long-Lived Assets

We evaluate the carrying value of our long-lived assets (property, plant and equipment and amortizable intangible assets) for potential impairment when events and circumstances warrant such a review. A long-lived asset group is considered impaired when the anticipated undiscounted future cash flows from the use and eventual disposition of the asset group is less than its carrying value. If the carrying value is not recoverable, an impairment loss is measured as the excess of the asset’s carrying value over its estimated fair value. When we cease to use an acquired trade name, we test the trade name for impairment using the relief from royalty method and we begin amortizing the trade name over its estimated useful life as a defensive asset. See Note 4 and Note 6 for a further discussion of long-lived asset impairments recognized in the consolidated statements of operations.

Goodwill

Goodwill represents the excess of the purchase price of the acquired businesses over the net fair value of acquired assets and assumed liabilities. Business combinations are accounted for using the “acquisition method.” We expect that all of our goodwill at March 31, 2026 is deductible for federal income tax purposes.

Goodwill and indefinite-lived intangible assets are not amortized, but instead are evaluated for impairment at least annually. We perform our annual assessment of impairment on January 1 of our fiscal year, and more frequently if circumstances warrant.

For purposes of the goodwill impairment assessment, assets are grouped into “reporting units.” A reporting unit is either an operating segment or a component of an operating segment, depending on how similar the components of the

operating segment are to each other in terms of operational and economic characteristics. For each reporting unit, we perform a qualitative assessment of relevant events and circumstances about the likelihood of goodwill impairment. If it is deemed more likely than not that the fair value of the reporting unit is less than its carrying value, we calculate the fair value of the reporting unit. Otherwise, further testing is not required. If the fair value of the reporting unit (including its inherent goodwill) is less than its carrying value, an impairment loss is recognized to the extent that the implied fair value of the goodwill of the reporting unit is less than its carrying value, limited to the total amount of goodwill for the reporting unit.

Estimates and assumptions used to perform the impairment evaluation are inherently uncertain and can significantly affect the outcome of the analysis. The estimates and assumptions we used in the annual goodwill impairment assessment included market participant considerations and future forecasted operating results. Changes in operating results and other assumptions could materially affect these estimates. See Note 5 for a further discussion and analysis of our goodwill impairment assessment.

Product Exchanges

Quantities of products receivable or returnable under exchange agreements are reported within prepaid expenses and other current assets and within accrued expenses and other payables in our consolidated balance sheets. We estimate the value of product exchange assets and liabilities based on the weighted average cost basis of the inventory we have delivered or will deliver on the exchange, plus or minus location differentials.

Variable Interest Entities

We decide at the inception of each arrangement whether an entity in which an investment is made or in which we have other variable interests is considered a variable interest entity (“VIE”). Generally, an entity is a VIE if: (1) the entity does not have sufficient equity at risk to finance its activities without additional subordinated financial support from other parties, (2) the entity’s investors lack any characteristics of a controlling financial interest or (3) the entity was established with non-substantive voting rights.

We consolidate VIEs when we are deemed to be the primary beneficiary. The primary beneficiary of a VIE is generally the party that both: (1) has the power to make decisions that most significantly affect the economic performance of the VIE and (2) has the obligation to absorb losses or the right to receive benefits that in either case could potentially be significant to the VIE. If we are not deemed to be the primary beneficiary of a VIE, we account for the investment or other variable interests in a VIE in accordance with applicable GAAP.

Noncontrolling Interests

Noncontrolling interests represent the portion of certain consolidated subsidiaries that are owned by third-parties. Amounts are adjusted by the noncontrolling interest holder’s proportionate share of the subsidiaries’ earnings or losses each period and any distributions that are paid. Noncontrolling interests are reported as a component of equity, unless the noncontrolling interest is considered redeemable, in which case the noncontrolling interest is recorded between liabilities and equity (mezzanine or temporary equity) in our consolidated balance sheet. The redeemable noncontrolling interest is adjusted at each balance sheet date to its maximum redemption value if the amount is greater than the carrying value.

Acquisitions and Contingent Consideration Liabilities

Acquisitions

To determine if a transaction should be accounted for as a business combination or an acquisition of assets, we first calculate the relative fair values of the assets acquired. If substantially all of the relative fair value is concentrated in a single asset or group of similar assets, or if not but the transaction does not include a significant process (does not meet the definition of a business), we record the transaction as an acquisition of assets. For acquisitions of assets, the purchase price is allocated based on the relative fair values and goodwill is not recorded. All other transactions are recorded as business combinations. We record the assets acquired and liabilities assumed in a business combination at their acquisition date fair values. For a business combination, the excess of the purchase price over the net fair value of acquired assets and assumed liabilities is recorded as goodwill, which is not amortized but instead is evaluated for impairment at least annually (as described above).

Pursuant to GAAP, an entity is allowed a reasonable period of time (not to exceed one year) to obtain the information necessary to identify and measure the fair value of the assets acquired and liabilities assumed in a business combination.

Contingent Consideration Liabilities

Certain business combinations in our Water Solutions segment included future royalty payments to the seller, which we recorded as contingent consideration liabilities as part of our purchase price allocation. The initial fair value was calculated based on an estimate of the activity related to the assets acquired in the transaction, either volumes or revenue, and an estimate of the expected useful life of the assets and discounted to its present value using an appropriate discount rate. The contingent consideration liabilities are recorded within accrued expenses and other payables and other noncurrent liabilities in our consolidated balance sheets. The fair value of the contingent consideration liabilities is assessed each reporting period to determine if there are any changes to the estimated expected activity and the expected useful life of the assets. The same process to calculate the initial fair value of the contingent consideration liabilities is used to calculate the updated fair value. Changes in the fair value of the contingent consideration liabilities are recorded within revaluation of liabilities in our consolidated statement of operations. The fair value estimates used in the analysis of the contingent consideration liabilities were primarily based on Level 3 inputs in the fair value hierarchy.

Reclassifications

During the three months ended March 31, 2026, we identified a misclassification related to amounts recorded within inventories that should have been recorded as linefill within property, plant and equipment in prior periods. To correct the misclassification in the current period financial statements, we adjusted our March 31, 2026 consolidated balance sheet by reducing inventories by approximately $11.0 million and increasing linefill within property, plant and equipment by approximately $7.0 million. The difference of $4.0 million represents the change in the value of the inventory from the period when it should have been classified as linefill and has been recorded within cost of sales-product in our consolidated statement of operations. We concluded that the misclassification was not material to any of our prior period financial statements, and accordingly the prior periods presented herein have not been adjusted, as the value of inventories was approximately $9.2 million as of March 31, 2025 and the change in the value was approximately $2.2 million.

Recent Accounting Pronouncements

In December 2025, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements for Interim Reporting, which amends ASC 270 to provide clarity on the current interim reporting requirements. The ASU improves the navigability of the required interim disclosures and clarifying when that guidance is applicable, provides additional guidance on what disclosures should be provided in interim reporting periods and adds to ASC 270 a principle that requires entities to disclose events since the end of the last annual reporting period that have a material impact on the entity. The ASU is effective for fiscal years beginning after December 15, 2027 (which is the Partnership’s fiscal year beginning April 1, 2028), and for interim periods within those fiscal years, with early adoption permitted. The amendments should be applied either prospectively or retrospectively to all prior periods presented in the financial statements. We are currently evaluating the ASU to determine its impact on our financial statement disclosures.

In July 2025, the FASB issued ASU 2025-05, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, which amends ASC 326-20 to provide a practical expedient for all entities when estimating expected credit losses for current accounts receivable and current contract assets that arise from transactions accounted for under ASC 606. The practical expedient assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. The ASU is effective for fiscal years beginning after December 15, 2025 (which is the Partnership’s fiscal year beginning April 1, 2026), and for interim periods within those fiscal years, with early adoption permitted. The amendments should be applied prospectively. We adopted this ASU beginning with the September 30, 2025 Quarterly Report on Form 10-Q. The adoption of this ASU did not impact our financial statements.

In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which includes amendments requiring, among other things, disclosure of disaggregated information about specific categories of expenses (purchases of inventory, employee compensation, depreciation, amortization, and depletion) included in certain expense captions on the income statement. Additionally, the amendments require disclosure of the total amount of selling expenses and an annual disclosure of the definition of selling expenses. The ASU is effective for fiscal years beginning after December 15, 2026 (which is the Partnership’s fiscal year beginning April 1, 2027), and for interim periods within fiscal years beginning after December 15, 2027 (which is the Partnership’s fiscal year beginning April 1, 2028), with early adoption permitted. The ASU may be applied either prospectively or retrospectively to all prior periods presented in the financial statements. We are currently evaluating the ASU to determine its impact on our financial statement disclosures.

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which includes amendments that further enhance income tax disclosures, primarily through standardization and disaggregation of rate reconciliation categories and income taxes paid by jurisdiction. The ASU is effective for the Partnership’s fiscal year beginning April 1, 2025, with early adoption permitted. The amendments are required to be applied prospectively with retrospective application permitted. We adopted this ASU for the fiscal year ended March 31, 2026, and applied the amendments prospectively.