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Summary of Significant Accounting Policies
6 Months Ended
Jun. 30, 2026
Accounting Policies [Abstract]  
Summary of Significant Accounting Policies Summary of Significant Accounting Policies
(a) Recently Issued Accounting Standards
Recently Adopted
In July 2025, the Financial Accounting Standards Board (“FASB”) issued ASU 2025-05, Financial Instruments - Credit Losses: Measurement of Credit Losses for Accounts Receivable and Contract Assets. This ASU simplifies the Current Expected Credit Losses model, including a practical expedient that allows entities to assume current economic conditions as of the balance sheet date will remain stable over the life of the short-term accounts receivable and contract assets arising from revenue contracts under ASC 606, without the need to forecast future economic conditions. This standard is effective for annual periods beginning after December 15, 2025, including interim periods within those annual periods. The Company adopted ASU 2025-05 effective January 1, 2026 on a prospective basis, as permitted by the ASU. The Company elected to apply the practical expedient for its current accounts receivable and current contract assets arising from revenue transactions under ASC 606, Revenues from Contracts with Customers. The adoption of ASU 2025-05 and the election of the practical expedient did not have a material impact on the Company’s condensed consolidated financial statements. The Company’s significant accounting policy for allowances for credit losses has been updated to reflect the election of this practical expedient.

In November 2024, the FASB issued ASU 2024-04, Debt — Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversions of Convertible Debt Instruments. The amendments in this ASU primarily clarify the requirements for determining whether the settlement of a convertible debt instrument should be accounted for as an induced conversion. This standard is effective for annual and interim reporting periods in fiscal years beginning after December 15, 2025. The Company adopted ASU 2024-04 effective January 1, 2026 on a prospective basis, as permitted by the standard. The adoption of ASU 2024-04 did not have a material impact on the Company’s condensed consolidated financial statements.
Not Yet Adopted

In December 2025, the FASB issued ASU 2025-12, Codification Improvements. This ASU addresses thirty-three items, representing codification changes that (1) clarify, (2) correct errors, or (3) make minor improvements. Generally, the amendments in this Update are not intended to result in significant changes for most entities. This standard is effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2026. Early adoption is permitted. The Company is currently evaluating the effects of this ASU, but does not expect a material impact on its condensed consolidated financial statements and disclosures.
In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. This ASU clarifies interim disclosure requirements and the applicability of Topic 270. The objective of the amendments is to provide further clarity about the current interim disclosure requirements. This standard is effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The Company is currently evaluating the effects of this ASU, but does not expect a material impact on its condensed consolidated financial statements and disclosures.
In September 2025, the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software. This ASU updates the rules on capitalizing costs related to developing software for internal purposes, eliminating the use of specific project phases and introducing new guidance on how to evaluate whether the probable-to-complete recognition threshold has been met. This standard applies to annual periods starting after December 15, 2027, including interim periods within those annual periods. Early adoption is permitted. The Company is currently evaluating the potential effects of this ASU on its condensed consolidated financial statements.
In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures: Disaggregation of Income Statement Expenses. This update requires entities to disclose specified information about certain costs and expenses, including the amounts related to (a) purchases of inventory, (b) employee compensation, (c) depreciation, (d) intangible asset amortization, and (e) depletion expense, disaggregated within relevant expense captions on the statements of operations. It also requires qualitative descriptions for amounts not separately disaggregated and the total amount of selling expenses, along with the entity’s definition of selling expenses. In January 2025, the FASB issued ASU 2025-01, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures: Clarifying the Effective Date. The guidance is effective for annual periods beginning after December 15, 2026, and interim periods beginning after December 15, 2027. Early adoption is permitted. The Company is currently assessing the impact of this ASU on its disclosures.
(b) Consolidation
The condensed consolidated financial statements include the accounts of the Company and its subsidiaries in which the Company has a controlling financial interest. All material intercompany balances and transactions have been eliminated in consolidation.
The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a VIE under US GAAP.
Voting Interest Entities. Voting interest entities are entities in which the total equity investment at risk is sufficient to enable the entity to finance its activities independently and the equity holders have the characteristics of a controlling financial interest, including the power to direct the activities of the entity that most significantly impact its economic performance through voting or similar rights. Voting interest entities are consolidated in accordance with ASC 810, Consolidation, if the Company owns a majority of the voting interests, unless control does not rest with the majority owner (for example, because of veto rights or other substantive participating rights held by non-controlling interest holders).
Variable Interest Entities. VIEs are entities that lack one or more of the characteristics of a voting interest entity, such as sufficient equity at risk to finance their activities without additional subordinated financial support or where the equity holders, as a group, lack the power to direct the activities that most significantly impact the entity’s economic performance. The Company consolidates a VIE in accordance with ASC 810 if it is the primary beneficiary, which occurs when the Company has both (i) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and (ii) the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE.
The Company reassesses its initial evaluation of whether an entity is a VIE upon the occurrence of certain reconsideration events as defined in ASC 810. The Company also reassesses its determination of whether it is the primary beneficiary of a VIE upon changes in facts and circumstances that could potentially alter its conclusion.
Non-controlling interests represent the portion of profit or loss and net assets attributable to equity interests in consolidated subsidiaries that are not owned by the Company. Non-controlling interests are presented as a separate component of equity in the condensed consolidated balance sheets and as a separate line item in the condensed consolidated statements of operations.
For additional information on the Company’s involvement with VIEs, refer to Note 2. “Variable Interest Entities.”
(c) Business Combinations and Asset Acquisitions
The Company accounts for acquisitions of businesses using the acquisition method under ASC 805. The assets acquired, liabilities assumed, and any non-controlling interest in the acquiree are recognized at their fair values on the
acquisition date. Acquisition-related costs are expensed as incurred. Goodwill is recognized as the excess of the consideration transferred over the fair value of the net assets acquired.

Acquisitions of assets or groups of assets that do not meet the definition of a business under ASC 805 are accounted for as asset acquisitions. In an asset acquisition, the total cost of the acquisition, including transaction costs which are capitalized as part of the acquisition cost, is allocated to the individual assets acquired and liabilities assumed based on their relative fair values at the acquisition date. No goodwill is recognized in asset acquisitions.

(d) Use of Estimates
The preparation of these condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the reporting date, as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
(e) Restricted Cash
Restricted cash consists of amounts held in a money market account at a financial institution that serve as collateral for outstanding standby letters of credit. The Company does not have the right to access or withdraw these funds while the related letters of credit remain outstanding. Interest earned on the account it not subject to these restrictions.
Restricted cash that is expected to be available for use within one year of the balance sheet date is classified as a current asset. Restricted cash that is not expected to be available for use within one year from the balance sheet date is classified as a non-current asset.

As of June 30, 2026, the Company had restricted cash of $70.7 million held as collateral for outstanding standby letters of credit (see Note 18. “Commitments and Contingencies”).

Restricted cash is included with cash and cash equivalents in the accompanying condensed consolidated statements of cash flows. The following table presents a reconciliation of cash, cash equivalents and restricted cash reported in the condensed consolidated balance sheets to the total of the same amounts shown in the condensed consolidated statements of cash flows.
June 30,
2026
December 31,
2025
Cash and cash equivalents$824.1 $353.3 
Restricted cash (non-current)70.7 — 
Cash, cash equivalents and restricted cash$894.8 $353.3 
(f) Accounts Receivable and Related Allowances
Accounts receivable, which consist of trade receivables, unbilled revenue, and operating lease receivables, are stated at the net amount expected to be collected. We record accounts receivable at the invoiced amount, and unbilled receivables represent revenues recognized but not yet invoiced. Accounts receivable are presented net of allowances for credit losses and uncollectible accounts, as applicable.
Trade Receivables

Trade receivables are evaluated for impairment under ASC 326, Financial Instruments – Credit Losses, using the current expected credit losses (“CECL”) methodology. For trade receivables arising from transactions accounted for under ASC 606, the Company has elected the practical expedient provided by ASU 2025-05. Under this expedient, the Company assumes that current conditions as of the balance sheet date remain unchanged for the remaining life of these assets when developing reasonable and supportable forecasts.
In determining the allowance for credit losses, we pool trade receivables with similar risk characteristics and apply an expected loss percentage derived from historical loss data. Our assessment of current conditions, including the length of time trade accounts receivable are past due, previous loss history and the condition of the general economy and the industry as a whole, is reflected as of the balance sheet date consistent with the practical expedient elected. The expected credit loss
percentage is determined using historical loss data adjusted for current conditions. Along with the expected credit loss percentage approach, we apply a case-by-case review on individual trade receivables when deemed appropriate.

The expense associated with the provision for credit losses on trade receivables is recognized in other operating expenses, net in our condensed consolidated statements of operations. Accounts deemed uncollectible are written off against the allowance when our customers’ financial condition deteriorates, impairing their ability to make payments, such as upon customer bankruptcies. Subsequent recoveries, if any, are credited to the allowance.

Operating Lease Receivables
Operating lease receivables represent amounts owed by lessees for lease payments under the Company’s operating leases under ASC 842, Leases. Collectability of lease payments is assessed at lease commencement and reassessed throughout the lease term. At lease commencement, we may collect one or more month’s rent in advance, which serve as collateral to mitigate credit risk. If collectability of substantially all lease payments is probable at lease commencement, leasing revenue is recognized on a straight-line basis over the lease term. For leases meeting this recognition threshold, the Company records an allowance for uncollectible operating lease receivables, as necessary, in accordance with ASC 450, Contingencies. The allowance is based on historical loss experience, current customer-specific conditions, and relevant economic factors without incorporating forward-looking expected losses under CECL. If collectability of substantially all lease payments is not probable, we recognize leasing revenue on a cash basis.

The following table presents activity related to our allowance for credit losses and uncollectible operating lease receivables.
Three Months Ended
June 30,
Six Months Ended
June 30,
2026202520262025
Balance at beginning of period$2.6 $2.1 $1.7 $1.3 
Provision for (recovery of) credit losses, net(1.1)(0.2)(0.4)0.6 
Provision for uncollectible operating lease receivables— — 0.2 — 
Write-offs(0.8)(0.8)(0.8)(0.8)
Balance at end of period$0.7 $1.1 $0.7 $1.1 
(g) Equipment Held for Lease and Property, Plant and Equipment
Equipment held for lease and property, plant and equipment are stated at cost, net of accumulated depreciation.
Depreciation is calculated using the straight-line method over the estimated useful lives of the assets except for turbine engine cores. Turbine engine cores represent a significant component of our turbines and are depreciated using the units of production method based on an expected life of 30,000 fired hours. To reflect this distinct depreciation method and usage-based nature of these assets, turbine engine cores are presented as a separate line item in the table below, Power Generation – Turbine engine core.
We capitalize interest on borrowings to the extent they are incurred during the construction or acquisition period of qualifying assets in accordance with ASC 835-20, Interest – Capitalization of Interest. Qualifying assets are assets which require a substantial period of time to get ready for their intended use, such as certain power generation equipment. The amount capitalized is based on the weighted-average expenditures incurred and applicable interest rates on specific or general borrowings. Capitalized interest is included in the cost basis of the related asset and is depreciated over the asset’s estimated useful life once the asset is substantially complete and ready for its intended use. Capitalization of interest ceases when the qualifying asset is substantially complete.
Useful Life
Equipment held for lease
Power Generation - Turbine25 years
Power Generation - Turbine engine core30,000 fired hours
Power Generation - Ancillary equipment
3 - 20 years
Power control and distribution equipment15 years
Property, plant and equipment
Oil and gas logistics equipment
5 - 15 years
Machinery and equipment
3 - 12 years
Furniture and fixtures5 years
Computer hardware and software
3 - 10 years
Vehicles5 years
Buildings and leasehold improvements15 years
Maintenance and repair costs are expensed as incurred. Expenditures that materially enhance the value or extend the useful life of the assets are capitalized. Upon sale or disposal, the asset’s cost and accumulated depreciation are removed from the balance sheet, with any resulting gain or loss recognized in operations.
Equipment held for lease and property, plant and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Recoverability is assessed by comparing the carrying amount of the asset to its estimated undiscounted future cash flows. If the carrying amount exceeds the estimated future cash flows, an impairment charge is recognized for the amount by which the carrying amount exceeds the asset’s fair value.
(h) Investments
Investments in equity securities are accounted for in accordance with ASC 321, Investments-Equity Securities. Equity securities with a readily determinable fair value are measured at fair value with changes in fair value recognized in earnings. For equity securities without a readily determinable fair value, the Company elects the measurement alternative, under which investments are recorded at cost, less impairment, and adjusted for observable price changes in orderly transactions for identical or similar investments of the same issuer.
The Company evaluates such investments each reporting period to determine whether impairment indicators are present. If an investment is determined to be impaired, the carrying amount is written down to its fair value, and the resulting loss is recognized in earnings.
(i) Convertible Notes

Our convertible notes are classified as convertible debt instruments recorded as liabilities in accordance with ASC 470-20 and are initially recognized at their principal amount, net of issuance costs and any discounts. Issuance costs and discounts are amortized to interest expense over the term of the instrument using the effective interest method. We evaluate each instrument to determine its classification as debt or equity and assess whether embedded features, such as conversion options, require bifurcation and separate accounting as derivatives under ASC 815-15. Bifurcation is required if these features are not clearly and closely related to the host contract and do not meet the scope exception criteria under ASC 815-40. Upon conversion, the carrying amount of the debt is reduced, and the settlement is accounted for based on the terms of the instrument, which may include issuance of common stock, cash payment, or a combination thereof. Interest expense includes the contractual coupon rate and amortization of issuance costs and discounts.

(j) Revenue
Service Revenue
We recognize service revenue upon the transfer of control of promised services (or distinct goods) to customers in an amount that reflects the consideration expected to be received. We evaluate collectibility based on historical payment
experience and customer financial condition. Customers are generally billed on a weekly or monthly basis, and contracts typically include payment terms of 30 to 60 days.
For contracts with multiple performance obligations, the transaction price is allocated based on relative stand-alone selling prices, or estimates of such prices, and revenue is recognized as each performance obligation is satisfied. Revenue from our mobile proppant and fluid management systems, last mile logistics, and ancillary equipment is primarily recognized over time as customers simultaneously receive and consume the benefits.
Certain contracts include the grant of exclusive rights to reserve specified equipment for a stated period. These reservation rights represent a stand-ready performance obligation satisfied over time on a straight-line basis as the Company stands ready to make the equipment available exclusively to the customer.
Receivables and Contract Assets
The following table presents the balances of receivables and contract assets arising from contracts with customers. Receivables represent amounts due from customers for goods and services that have been billed. Contract assets represent amounts earned from performance under a contract but not yet billed to the customer (unbilled receivables).
June 30,
2026
December 31,
2025
Receivables$96.3 $64.3 
Contract assets (unbilled revenues)10.0 11.7 
Variable consideration may include discounts, price concessions and incentives. We estimate variable consideration based on the expected amount to be received and updates our estimate as facts and circumstances change.
Leasing Revenue
Leasing revenue is recognized on a straight-line basis over the lease term, reflecting the consumption of benefits derived from the leased assets. Lease payments are fixed throughout the lease term. Leasing arrangements may be renewed, subject to price negotiations with customers.
Future minimum lease payments to be received under our long-term lessor arrangements as of June 30, 2026, including payments from leases that have already commenced and leases that will commence in the future based on estimated commencement dates, were as follows:
Year Ending December 31,Future Lease Payments to be Received
2026 (remainder of)$210.8 
2027660.1 
2028743.3 
2029731.6 
2030721.1 
Thereafter3,035.7 
Total$6,102.6 
Disaggregation of Revenue
We categorize revenue from contracts with customers by revenue-generating activity, in alignment with our two reportable segments. This includes service revenue recognized under ASC 606 and leasing revenue recognized under ASC 842. The table below presents information on our disaggregated revenue.
Three Months Ended
June 30,
Six Months Ended
June 30,
2026202520262025
Solaris Power Solutions
Leasing revenue$105.7 $61.9 $211.0 $101.0 
Service revenue52.6 13.7 75.8 24.0 
Solaris Logistics Solutions
Service revenue61.1 73.7 128.8 150.7 
Total revenue$219.4 $149.3 $415.6 $275.7 
Sublease income totaled $27.9 million and $28.6 million for the three months ended June 30, 2026 and 2025, respectively, and $72.5 million and $36.2 million for the six months ended June 30, 2026 and 2025, respectively. Sublease income is included in leasing revenue in the condensed consolidated statements of operations.
Deferred Revenue
Deferred revenue consists of customer payments received in advance of earning revenue. It includes amounts related to advance lease payments (ASC 842) and other upfront fees (ASC 606).
As of June 30, 2026 and December 31, 2025, deferred revenue consisted of the following:
June 30,
2026
December 31,
2025
ASC 842$185.2 $5.8 
ASC 6067.2 — 
Total deferred revenue$192.4 $5.8 
Deferred revenue is classified as current or non-current based on when the related revenue is expected to be recognized. As of June 30, 2026, $18.0 million is classified as current and $174.4 million as non-current. As of December 31, 2025, $5.8 million was classified as current and no amounts were classified as non-current.