STEM, INC.

1. BUSINESS

Description of the Business

Stem, Inc., together with its consolidated subsidiaries (“Stem,” the “Company,” “we,” “us,” or “our”), is a global leader reimagining technology to support the energy transition. We help asset owners, operators, and stakeholders benefit from the full value of their energy portfolio by enabling the intelligent development, deployment and operation of clean energy assets.

PowerTrack is our integrated suite of software and solutions for solar, storage and hybrid assets. Within the PowerTrack product suite we offer PowerTrack Software, PowerTrack Energy Management System, PowerTrack Supervisory Control and Data Acquisition (“SCADA”), PowerTrack Power Plant Controller (“PPC”), PowerTrack Logger and PowerTrack Optimizer.

The PowerTrack Software for solar monitoring and analytics enables the standardization of energy portfolios on one hardware agnostic application. Our commercial- and utility-scale edge hardware solutions are original equipment manufacturer (“OEM”)-agnostic devices that are used to connect customers’ solar and storage assets to our software applications in a unified view. Our Managed Services are full lifecycle, storage services covering the design, procurement, commissioning, operation and optimization of energy storage and hybrid systems, enabled by our PowerTrack Optimizer software. Our comprehensive suite of Professional Services supports solar and storage projects through every stage of the project lifecycle, offering the expertise needed to navigate complexity and scale clean energy portfolios.

Stem, Inc. was incorporated on March 16, 2009 in the State of Delaware and is headquartered in Houston, Texas.

Liquidity

As of June 30, 2026, we had cash and cash equivalents of $38.4 million, an accumulated deficit of $1,522.1 million, and negative working capital, which we define as current assets less current liabilities, of $18.2 million. During the six months ended June 30, 2026, we incurred a net loss of $33.3 million and had negative cash flows from operating activities of $8.0 million. As of June 30, 2026, our principal sources of liquidity were cash and cash equivalents totaling $38.4 million, which were held for working capital purposes and for investment growth opportunities. To the extent that current and anticipated future sources of liquidity are insufficient to fund our cash requirements and future business activities, we may be required to seek additional equity or debt financing. If we are unable to raise additional capital or generate cash flows necessary to expand our operations and invest in continued innovation, or pay our interest expense associated with our debt issuances, we may not be able to compete successfully, which would harm our business, operations, and financial condition. At June 30, 2026, we believe that our cash position is sufficient to meet our capital and liquidity requirements for at least the next 12 months.

Our business prospects are subject to various risks, expenses and uncertainties, including those discussed in Part I. Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The attainment of profitable operations is dependent upon future events, including continued execution of our software and services-oriented strategy, the successful delivery of AI-enabled software and edge device capabilities to our customers, securing new customers and maintaining current ones, and hiring, motivating and retaining appropriate personnel. Failure to generate sufficient revenues, achieve planned gross margins and operating profitability, control operating costs, or secure additional funding as required may require us to modify, delay or abandon some of our planned future expansion or development, or to otherwise enact additional operating cost reductions, which could have a material adverse effect on our business, operating results and financial condition.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim reporting and with the instructions to Form 10-Q and Article 10 of Regulation S-X, assuming the Company will continue as a going concern. Accordingly, the consolidated balance sheet at December 31, 2025 has been derived from the audited financial statements at that date, but certain notes or other information that are normally required by GAAP have been omitted if they substantially duplicate the disclosures contained in the Company’s annual audited consolidated financial statements. In the opinion of the Company’s management, all normal and recurring adjustments considered necessary for a fair statement of the results for the interim period presented have been included in the accompanying unaudited condensed consolidated financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited financial statements for the year ended December 31, 2025. Operating results for the three and six months ended June 30, 2026 are not necessarily indicative of the results that may be expected for the year ending December 31, 2026 or for any other future interim period or year.

On June 23, 2025, we effected a 1-for-20 reverse stock split, which reduced the number of our shares of common stock outstanding on that date from 167,169,140 shares to 8,358,370 shares. The number of authorized shares of our common stock has been reduced from 500.0 million shares to 250.0 million shares and the number of authorized shares of preferred stock remained unchanged at 1.0 million shares. The number of shares of common stock issuable upon settlement of outstanding restricted stock units and exercise of options was reduced proportionately as a result of the reverse stock split. Additionally, the exercise price of all outstanding options, the number of shares of common stock issuable upon the exercise of all outstanding options, and the number of shares reserved for future issuance pursuant to our equity incentive plans were all adjusted proportionately as a result of the reverse stock split. All share and per share amounts, exercise prices, conversion rates and conversion prices presented herein that relate to dates, or were established, prior to the reverse stock split have been adjusted retroactively to reflect these changes.

Principles of Consolidation

The unaudited condensed consolidated financial statements include the accounts of the Company, its wholly-owned subsidiaries, and consolidated variable interest entities (“VIEs”). The Company presents non-controlling interests within the equity section of its unaudited condensed consolidated balance sheets, and the amount of consolidated net (loss) income that is attributable to the Company and the non-controlling interest in its unaudited condensed consolidated statements of operations. All intercompany balances and transactions have been eliminated in consolidation.

Variable Interest Entities

The Company has in some instances formed special purpose entities (“SPEs”), some of which are VIEs, with its investors in the ordinary course of business to facilitate the funding and monetization of its energy storage systems. A legal entity is considered a VIE if it has either a total equity investment that is insufficient to finance its operations without additional subordinated financial support or whose equity holders lack the characteristics of a controlling financial interest. The Company’s variable interests arise from contractual, ownership, or other monetary interests in the entity. The typical condition for a controlling financial interest ownership is holding a majority of the voting interests of an entity; however, a controlling financial interest may also exist in entities, such as VIEs, through arrangements that do not involve controlling voting interests.

The Company consolidates a VIE if it is deemed to be the primary beneficiary. The Company determines it is the primary beneficiary if it has the power to direct the activities that most significantly impact the VIEs’ economic performance and has the obligation to absorb losses or has the right to receive benefits of the VIE that could potentially be significant to the VIE. The Company evaluates its relationships with its VIEs on an ongoing basis to determine whether it is the primary beneficiary.

Beginning in January 2022, the Company entered into strategic joint ventures (“DevCo JVs”) with unrelated third parties, through indirect wholly-owned development subsidiaries of the Company, with the purpose of originating potential battery storage facility projects in specific locations and conducting early-stage planning and development activities. The Company determined that the DevCo JVs are VIEs, as they lack sufficient equity to finance their activities without additional financial support. The Company determined that it has both (1) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and (2) the obligation to absorb losses or receive benefits from the VIE that could potentially be significant. Accordingly, the Company has determined that it is the primary beneficiary of the DevCo JVs, and as a result, the DevCo JVs’ operating results, assets and liabilities are consolidated by the Company, with third party minority owners’ share presented as noncontrolling interest. The Company applied the hypothetical liquidation at book value method in allocating recorded net income (loss) to each owner based on the change in the reporting period, of the amount of net assets of the entity to which each owner would be entitled to under the governing contracts in a liquidation scenario.

The following table summarizes the carrying values of the assets and liabilities of the DevCo JVs that were consolidated by the Company as of June 30, 2026 and December 31, 2025 (in thousands):

We are not making further investments in these DevCo JVs, and as of December 31, 2025 we have sold, or written off, all project assets associated with the DevCo JVs. The net loss from the DevCo JVs wasimmaterial during the three and six months ended June 30, 2026 and 2025.

Use of Estimates

The preparation of unaudited condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the unaudited condensed consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions believed to be reasonable. Actual results could differ from those estimates and such differences could be material to the financial position and results of operations.

Significant estimates and assumptions reflected in these unaudited condensed consolidated financial statements include, but are not limited to, estimates of transaction price with variable consideration; the useful life associated with acquired intangibles; the amount of deferred commissions and contract fulfillment costs; the valuation of energy storage systems; realizability of finite-lived intangible assets; recoverability of internally developed software; accruals related to sales tax liabilities; valuation techniques used to determine gain on debt extinguishment; and the fair value of debt instruments; warrant liability and assets acquired and liabilities assumed in a business combination.

Segment Information

Operating segments are defined as components of an entity for which discrete financial information is available that is regularly reviewed by the Chief Operating Decision Maker (“CODM”) in deciding how to allocate resources to an individual segment and in assessing performance. The Company’s Chief Executive Officer is the CODM. The CODM reviews financial information presented on a consolidated basis for purposes of making operating decisions, allocating resources, and evaluating financial performance. As such, management has determined that the Company operates asone operating segment that is focused exclusively on innovative technology services that transform the way energy is distributed and consumed. Net assets outside of the U.S. were less than 10% of total net assets as of June 30, 2026 and December 31, 2025.

Accounts Receivable, Net

Accounts Receivable are stated at amounts estimated by management to be equal to their net realizable values. Accounts receivable also includes unbilled accounts receivable, which is composed of milestone development activities of noncancellable purchase orders and monthly energy optimization services provided and recognized but not yet invoiced as of the end of the reporting period. The allowance for credit losses is the Company's best estimate of the amount of expected credit losses. The expectation of collectability is based on the Company's review of credit profiles of customers, contractual terms and conditions, current economic trends, and historical payment experience. If events or changes in circumstances indicate that specific receivable balances may be impaired, further consideration is given to the collectability of those balances and an allowance is recorded accordingly. The total allowance for credit losses balance was $2.7 million and $6.3 million, all of which is recorded against current accounts receivables as of June 30, 2026 and 2025, respectively.

The following table presents the changes in the current expected credit losses during the six months ended June 30, 2026 and 2025 (in thousands):

The net book value of unbilled receivables, current are $2.6 million and $2.7 million as of June 30, 2026 and December 31, 2025, respectively. Unbilled receivables, current are included in accounts receivable, net. The net book value of unbilled receivables, noncurrent are $0.1 million and $0.1 million as of June 30, 2026 and December 31, 2025, respectively. Unbilled receivables, noncurrent are included in other noncurrent assets.

Concentration of Credit Risk and Other Uncertainties

Financial instruments that potentially subject the Company to concentration of credit risk consist of cash and cash equivalents and accounts receivable. The Company’s cash balances are primarily invested in money market funds or on deposit at high credit quality financial institutions in the U.S. The Company’s cash and cash equivalents are held at financial institutions where account balances may at times exceed federally insured limits. Management believes the Company is not exposed to significant credit risk due to the financial strength of the depository institutions in which the cash is held. The Company has no financial instruments with off-balance sheet risk of loss.

Significant Customers

A significant customer represents 10% or more of the Company’s total revenue or accounts receivable, net balance at each reporting date. For each significant customer, revenue as a percentage of total revenue and accounts receivable as a percentage of total accounts receivable were as follows:

*Total less than 10% for the period.

There are inherent risks whenever a large percentage of total revenue is concentrated in a limited number of customers. Should a significant customer terminate or fail to renew its contracts with us, in whole or in part, for any reason, or experience significant financial or operating difficulties, it could have a material adverse effect on our financial condition and results of operations. In general, a customer that makes up a significant portion of revenues in one period, may not make up a significant portion in subsequent periods.

Goodwill

Goodwill amounts are not amortized, but rather tested for impairment at least annually or more often if circumstances indicate that the carrying value may not be recoverable. Goodwill is considered impaired if the carrying value of the reporting unit exceeds its fair value. The Company hasone reporting unit and as a result, goodwill has been assigned to the single reporting unit. The Company will conduct its annual impairment test of goodwill in the fourth quarter of fiscal year 2026 to determine if an adjustment to the carrying value of goodwill is required. The Company tests goodwill for impairment using a Step 1 quantitative test and compares the reporting unit’s fair value to its carrying value. An impairment is recorded for any excess carrying value above the reporting unit’s fair value, not to exceed the amount of goodwill. The Company estimates fair value of its reporting unit using a discounted cash flow model, commonly referred to as the income approach. The income approach uses a reporting unit’s projection of estimated operating results and cash flows that is discounted using a weighted-average cost of capital that reflects current market conditions appropriate to the Company’s reporting unit. The discounted cash flow model uses management’s best estimates of economic and market conditions over the projected period using the best information available, including growth rates in revenues, costs and estimates of future expected changes in operating margins and cash expenditures. Other estimates and assumptions include terminal value growth rates, weighted average cost of capital and changes in future working capital requirements.

Fair Value of Financial Instruments

Assets and liabilities recorded at fair value in the unaudited condensed consolidated financial statements are categorized based upon the level of judgment associated with the inputs used to measure their fair value. The fair value of the Company’s financial assets and liabilities reflects management’s estimate of amounts that the Company would have received in connection with the sale of the assets or paid in connection with the transfer of the liabilities in an orderly transaction between market participants at the measurement date. In connection with measuring the fair value of its assets and liabilities, the Company seeks to maximize the use of observable inputs (market data obtained from independent sources) and to minimize the use of unobservable inputs (internal assumptions about how market participants would price assets and liabilities).

Hierarchical levels which are directly related to the amount of subjectivity associated with the inputs to the valuation of these assets or liabilities are as follows:

Level 1 —Unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access as of the measurement date.

Level 2 —Inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data.

Level 3 —Unobservable inputs for the asset or liability only used when there is little, if any, market activity for the asset or liability at the measurement date.

This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to their fair value measurement. The Company’s assessment of the significance of a specific input to the fair value measurement in its entirety requires management to make judgments and consider factors specific to the asset or liability.

Financial assets and liabilities held by the Company measured at fair value on a recurring basis as of June 30, 2026 and December 31, 2025 include cash and cash equivalents and restricted cash, and warrant liability.

Assets measured at fair value on a non-recurring basis as of June 30, 2026 are assets held for sale.

New Accounting Standards

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40). The amendments in this update enhance disaggregated disclosure of income statement expenses for companies by requiring disaggregation of certain expense captions into specified categories in

disclosures within the footnotes to the financial statements. The effective date of ASU 2024-03 was amended by ASU 2025-01, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date. This update is effective for annual periods beginning after December 15, 2026, and interim periods within annual reporting periods beginning after December 15, 2027, though early adoption of is permitted. The Company is currently evaluating the ASU to determine its impact on the Company’s 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, which clarifies and modernizes the guidance to reflect the evolution of software development from a sequential to an agile development method. The amendments in this update remove all references to project stages to reflect this change in software development and requires capitalization of software costs to begin when management has authorized and committed to funding the project and it is probable the project will be completed and used to perform the intended function. The amendments do not change what internal-use software costs can be capitalized or when such capitalization ceases. This update is effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods, though early adoption is permitted as of the beginning of an annual reporting period. The amendments may be adopted either prospectively, using a modified transition approach, or retrospectively. The Company is currently evaluating the ASU to determine its impact on the Company’s disclosures.

In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements, which is intended to clarify interim disclosure requirements and the applicability of Accounting Standards Codification Topic 270 - Interim Reporting. The amendments create a comprehensive list of required interim disclosures and introduce a disclosure principle requiring entities to disclose, in interim periods, any event or change since the previous year-end that has a material effect on the entity. The guidance is effective for interim periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the ASU to determine its impact on the Company’s disclosures.

3. REVENUE

Revenue is recognized when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. As many contracts contain multiple goods or services delivered to the customer at different times, the transaction price is allocated to each good or service based on the relative standalone selling price and revenue is recognized when or as the performance obligation is satisfied. The Company recognizes revenue through arrangements with customers, host customer arrangements, and partnership arrangements.

Disaggregation of Revenue

Product line revenue, as presented below, depicts the nature, amount and timing of revenue for the Company’s various offerings.

PowerTrack Software –Recurring Software as a Service (“SaaS”) revenue from our PowerTrack platform supporting customer-owned clean energy assets.

Edge Hardware –Sales of edge device hardware to aid in the collection of site data and the real-time operation and control of sites.

Project and Professional Services & Other–Full lifecycle energy services including development and engineering, procurement and integration, performance and operations support, and revenue tied to DevCo JVs.

Managed Services –Includes (1) recurring revenue related to the operation and optimization of energy storage and hybrid portfolios managed by Stem, (2) full lifecycle, storage services covering the design, procurement and commissioning of energy storage and hybrid systems and (3) Host Customer recurring and merchant revenues.

Battery Hardware Resale –Sales of energy storage systems through partnership arrangements.

The following table provides information on the disaggregation of revenue as recorded in the unaudited condensed consolidated statements of operations (in thousands):

The following table summarizes reportable revenue by geographic regions determined based on the location of the customers (in thousands):

Remaining Performance Obligations

The Company’s remaining performance obligations represent the unrecognized revenue value of its contractual commitments, which include deferred revenue and amounts that will be billed and recognized as revenue in future periods. As of June 30, 2026, the Company had $366.6 million of remaining performance obligations, of which, we expect to recognize in revenue approximately 22%in the next 12 months, with the remainder recognized in revenue in periods thereafter.

Contract Balances

The following table provides information about contract assets and liabilities from contracts with customers:

The balance of contract assets is driven by the difference in timing of when revenue is recognized from performance obligations satisfied in the current reporting period and when amounts are invoiced to the customer. The balance of contract liabilities is driven by the difference in timing between when cash is received pursuant to a contract and when the Company’s performance obligations under the contract are satisfied.

The following table presents the changes in the contract liabilities balances during the six months ended June 30, 2026 and June 30, 2025 (in thousands):

4. FAIR VALUE MEASUREMENTS

Fair value accounting is applied for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. On June 30, 2026 and December 31, 2025, the carrying amount of accounts receivable, other current assets, accounts payable, and accrued and other current liabilities approximated their estimated fair value due to their relatively short maturities.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table provides the financial instruments measured at fair value (in thousands):

The Company’s money market funds are classified as Level 1 because they are valued using quoted market prices. Warrant liability is classified as Level 3 in the fair value hierarchy because its valuation is based on significant unobservable inputs, which incorporate the Company’s own assumptions in valuation techniques used to determine fair value; further discussion of these assumptions is set forth below. There wereno transfers into or out of Level 3 of the fair value hierarchy during the periods presented.

Fair Value of Convertible Promissory Notes

The convertible notes are recorded at face value less unamortized debt issuance costs (see Note 8—Debt for additional details) on the unaudited condensed consolidated balance sheets as of June 30, 2026 and December 31, 2025. As of June 30, 2026 and December 31, 2025, the estimated fair value of the 0.50% Green Convertible Notes due 2028 (the “2028 Convertible Notes”) was$30.7 million and $26.3 million, respectively, based on Level 2 quoted bid prices of the convertible notes in an over-the-counter market on the last trading date of the reporting period. As of June 30, 2026 and December 31, 2025, the estimated fair value of the 4.25% Green Convertible Senior Notes due 2030 (the “2030 Convertible Notes”) was$46.3 million and $42.0 million, respectively, based on Level 2 quoted bid prices of the convertible notes in an over-the-counter market on the last trading date of the reporting period.

Fair Value of 2030 Senior Secured Notes

The senior secured notes are recorded at face value less unamortized debt issuance costs (see Note 8—Debt for additional details) on the unaudited condensed consolidated balance sheets as of June 30, 2026 and December 31, 2025. The face value as of June 30, 2026 includes paid-in-kind interest of$4.6 million. As of June 30, 2026 and December 31, 2025, the estimated fair value of the 2030 Senior Secured Notes was$145.8 million and $140.6 million, respectively, based on a Level 3 Black Derman-Toy lattice model.

Private Warrant Liability

As discussed in Note 9—Warrants, under a warrant agreement dated June 30, 2025, the Company issued 439,919 warrants (the “2030 Private Placement Warrants”), each of which entitled the holder to purchaseone share of common stock at an exercise price of$30.00.

Upon issuance, these warrants met the criteria for liability classification. The fair value of the 2030 Private Placement Warrants as of June 30, 2026 was determined using the Black-Scholes-Merton model. Inputs include exercise price, volatility, fair value of common stock, expected term, expected dividend rate and risk-free interest rate.

The key assumptions used for the valuation of the private warrant liability upon remeasurement were as follows:

The following table presents the changes in the liability for the Company’s warrants during the six months ended June 30, 2026 (in thousands):

Assets Measured at Fair Value on a Nonrecurring Basis

As of June 30, 2026, the Company measured certain assets held for sale at fair value on a nonrecurring basis. These assets, consisting ofthree battery energy storage system projects, were classified as held for sale and measured at the lower of carrying value or fair value less cost to sell. An impairment loss of $3.3 million was recognized during the three months ended March 31, 2026. During the three months ended June 30, 2026, the Company recognized a$0.4 million gain on the assets that no longer met held for sale criteria and a$0.1 million remeasurement adjustment to theimpairment of assets held for sale. As of June 30, 2026, the carrying value of the assets is $1.2 million. See Note 7—Energy Storage Systems, Net for additional details.

The following table provides the assets measured at fair value on a nonrecurring basis (in thousands):

The fair value measurement for these assets is classified as Level 3 in the fair value hierarchy, as it is based on estimated sales price of the assets.

The Company also periodically measures goodwill at fair value on a nonrecurring basis. We calculate the fair value used in our annual goodwill impairment analysis utilizing a discounted cash flow model and determined that the inputs used are level 3 inputs.

5. BUSINESS ACQUISITIONS

On April 22, 2026, the Company acquired 100% of the assets ofraicoon GmbH (“raicoon”). raicoon is a Vienna-based software company focused on automated fault detection and event management for solar asset performance. The total transaction consideration to acquire raicoon was $4.3 million, payable solely in the form of the Company’s common stock. The transaction costs associated with the asset acquisition were immaterial.

The acquisition of raicoon was accounted for as a business combination under ASC 805, Business Combinations (“ASC 805”). Pursuant to ASC 805, the purchase price was allocated to the identifiable assets acquired based on their estimated fair values at the date of acquisition. The Company recorded approximately $0.1 million for other current assets, and $1.7 million for separately identifiable intangible assets other than goodwill. The intangible assets include $1.5 million for developed technology with an estimated useful life of 5 years, and $0.2 million for customer relationships with an estimated useful life of 5 years. Developed technology represents the fair value of raicoon’s autonomous software platform that uses artificial intelligence and machine learning to manage and optimize operations and energy allocation of solar power plants and renewable energy systems using the multiple-period excess earnings method. Customer relationships represent the estimated fair values of the underlying relationships with raicoon customers measured using the loss profits method, also referred to as the “with and without method.”

The excess of the amount paid over the estimated fair values of the identifiable net assets acquired of approximately $2.5 million was allocated to goodwill, primarily attributable to the assembled workforce and expected synergies from integrating raicoon’s platform into the Company's PowerTrack product suite. Goodwill is not deductible for tax purposes.

The Company has included the financial results of the acquired company in its condensed consolidated financial statements from the date of acquisition.

Pro forma financial information is not presented because the acquisition is not significant under SEC Regulation S-X Rule 3-05, Financial Statements of Businesses Acquired or to be Acquired.

6. GOODWILL AND INTANGIBLE ASSETS, NET

Goodwill

As of June 30, 2026, the aggregate carrying value of goodwill was $2.5 million, all attributable to the acquisition of raicoonon April 22, 2026. There were no subsequent changes in the initial carrying amount of goodwill established by the acquisition of raicoon during three months June 30, 2026. The effect of foreign currency translation was immaterial. See Note 5— Business Acquisitionsfor additional details.

Goodwill is tested for impairment annually, or more often if an event or circumstance indicates that the carrying amount may not be recoverable.

Intangible Assets

Intangible assets, net, consists of the following (in thousands):

Accumulated amortization was approximately$21.0 million for developed technology,$7.1 million for trade name,$39.3 million for customer relationships, and$63.3 million for internally developed software as of June 30, 2026.

Amortization expense for intangible assets was$7.1 million and $7.2 million for the three months ended June 30, 2026 and 2025, respectively, and $14.2 million and$14.2 million for the six months ended June 30, 2026 and 2025, respectively.

7. ENERGY STORAGE SYSTEMS, NET

Energy storage systems, net, consists of the following (in thousands):

Depreciation expense for energy storage systems was approximately $2.9 million and $3.1 million for the three months ended June 30, 2026 and 2025, respectively, and approximately $5.7 million and $6.3 million for the six months ended June 30, 2026 and 2025, respectively. Depreciation expense is recognized in cost of services and other.

Impairment expense for energy storage systems was approximately $0.1 million and $1.4 million for the three months ended June 30, 2026 and 2025, respectively, and approximately $0.1 million and $1.4 million for the six months ended June 30, 2026 and 2025, respectively. Impairment expense is recognized in cost of services and other.

On February 10, 2026, the Company, through an indirect consolidated subsidiary, Stem Finance SPV VI ULC, made the decision to sell Logan Energy Storage ULC (“Logan”), a wholly owned subsidiary. Logan owns and operates four battery energy storage system projects in Ontario, Canada. As of March 31, 2026, the Company determined that thefour battery energy system projects were considered to be assets held for sale, since these assets were being marketed for sale and all the criteria to be classified as held for sale under ASC 360, Property, Plant and Equipment-Impairment or Disposal of Long-Lived Assets, had been met. Assets held for sale are measured at the lower of their carrying value or the fair value less cost to sell. During the three months ended March 31, 2026, the Company determined that the carrying value of the assets was less than the fair value and recognized an impairment of assets held for sale of approximately $3.3 million in the unaudited condensed consolidated statements of operations. As a result of the impairment, the carrying value of the assets was $1.4 million as of March 31, 2026. During three months ended June 30, 2026, the Company determined thatone battery energy system project previously considered to be assets held for sale no longer met the criteria. As a result, $0.6 million was reclassified to energy storage systems, net on the condensed consolidated balance sheet as of June 30, 2026. The Company also recognized a$0.4 million gain on the assets that no longer met held for sale criteria and a$0.1 million remeasurement adjustment to theimpairment of assets held for sale during the three months ended June 30, 2026. The Company expects to dispose of the remaining assets held for sale within one year.

8. DEBT

2028 Convertible Notes and 2028 Capped Call Options

2028 Convertible Notes

On November 22, 2021, the Company issued$460.0 million aggregate principal amount of its 2028 Convertible Notes in a private placement offering to qualified institutional buyers (the “2021 Initial Purchasers”) pursuant to Rule 144A under the Securities Act of 1933.

The 2028 Convertible Notes are senior, unsecured obligations of the Company and bear interest at a rate of 0.5% per year, payable in cash semi-annually in arrears in June and December of each year. The remaining 2028 Convertible Notes will mature on December 1, 2028, unless earlier repurchased, redeemed or converted in accordance with their terms prior to such date. Upon conversion, the Company may choose to pay or deliver, as the case may be, cash, shares of its common stock or a combination of cash and shares of common stock. The 2028 Convertible Notes are redeemable for cash at the Company’s option at any time given certain conditions (as discussed below). At the time of issuance, the initial conversion rate was 34.1965 shares of common stock per $1,000 principal amount of 2028 Convertible Notes, which was equivalent to an initial conversion price of approximately $29.24 per share of the Company’s common stock. As a result of the reverse stock split discussed in Note 2— Summary of Significant Accounting Policies under “Basis of Presentation”, the conversion rate was adjusted to 1.7098 shares of common stock per $1,000 principal amount, which is equivalent to a conversion price of approximately $584.86 (the “2028 Conversion Price”) per share of the Company’s common stock. The conversion rate is subject to customary adjustments for certain events as described in the related indenture.

The Company may redeem for cash all or any portion of the 2028 Convertible Notes, at the Company’s option, on or after December 5, 2025 if the last reported sale price of the Company’s common stock has been at least 130% of the 2028 Conversion Price then in effect for at least 20 trading days at a redemption price equal to 100% of the principal amount of the 2028 Convertible Notes to be redeemed, plus accrued and unpaid interest.

The Company’s net proceeds from this offering were approximately $445.7 million, after deducting the 2021 Initial Purchasers’ discounts and debt issuance costs. To minimize the effect of potential dilution to the Company’s common stockholders upon conversion of the 2028 Convertible Notes, the Company entered into separate capped call transactions (the “2028 Capped Calls”) as described below. In connection with the issuance of the 2030 Convertible Notes during the second quarter of 2023, the Company used approximately $99.8 million of the net proceeds to purchase and surrender for cancellation approximately $163.0 million aggregate principal amount of the Company’s 2028 Convertible Notes, which resulted in a $59.4 million gain on debt extinguishment. See 2030 Convertible Notes below for further details of the 2030 Convertible Notes. On June 30, 2025, the Company exchanged $228.8 million aggregate principal amount of the Company’s 2028 Convertible Notes for a portion of the Senior Secured PIK Toggle Notes due 2030 (the “2030 Senior Secured Notes”), as part of a privately negotiated exchange agreement with holders of 2028 Convertible Notes. See 2030 Senior Secured Notes below for further details.

Upon adoption of ASU 2020-06, the Company allocated all of the debt discount to long-term debt. The debt discount is amortized to interest expense using the effective interest method, computed to be 0.9%, over the life of the 2028 Convertible Notes or approximately itsseven-year term. The outstanding 2028 Convertible Notes balances as of June 30, 2026 and December 31, 2025 are summarized in the following table (in thousands):

The following table presents total interest expense recognized related to the 2028 Convertible Notes during the three and six months ended June 30, 2026 and 2025 (in thousands):

2028 Capped Call Options

On November 17, 2021, in connection with the pricing of the 2028 Convertible Notes, and on November 19, 2021, in connection with the exercise in full by the 2021 Initial Purchasers of their option to purchase additional Notes, the Company entered into the 2028 Capped Calls with certain counterparties. The Company used $66.7 million of the net proceeds from the 2028 Convertible Notes to pay the cost of the 2028 Capped Calls.

At the time of issuance, the 2028 Capped Calls had an initial strike price of $29.2428 per share, which corresponded to the initial conversion price of the 2028 Convertible Notes, and is subject to anti-dilution adjustments. The 2028 Capped Calls had an initial cap price of $49.6575 per share, subject to certain adjustments. As a result of anti-dilution adjustments arising from the reverse stock split described in Note 2— Summary of Significant Accounting Policies under “Basis of Presentation”, the strike price and cap price were adjusted to $584.856 and $993.15, respectively.

The 2028 Capped Calls are considered separate transactions entered into by and between the Company and the 2028 Capped Calls counterparties, and are not part of the terms of the 2028 Convertible Notes. The Company recorded a reduction to additional paid-in capital of $66.7 million during the year ended December 31, 2021 related to the premium payments for the

2028 Capped Calls. These instruments meet the conditions outlined in FASB ASU 2022-01 Topic 815, Derivatives and Hedging (“ASC 815”) to be classified in stockholders’ deficit and are not subsequently remeasured as long as the conditions for equity classification continue to be met.

2030 Convertible Notes and 2030 Capped Call Options

2030 Convertible Notes

On April 3, 2023, the Company issued $240.0 million aggregate principal amount of its 2030 Convertible Notes in a private placement offering to qualified institutional buyers (the “2023 Initial Purchasers”) pursuant to Rule 144A under the Securities Act of 1933, as amended.

The 2030 Convertible Notes are senior, unsecured obligations of the Company and bear interest at a rate of 4.25% per year, payable in cash semi-annually in arrears in April and October of each year, beginning on October 1, 2023. The 2030 Convertible Notes will mature on April 1, 2030, unless earlier repurchased, redeemed or converted in accordance with their terms prior to such date. Upon conversion, the Company may choose to pay or deliver cash, shares of common stock or a combination of cash and shares of common stock. The 2030 Convertible Notes are redeemable for cash at the Company’s option at any time given certain conditions (as discussed below). At the time of issuance, the initial conversion rate was 140.3066 shares of common stock per $1,000 principal amount of the 2030 Convertible Notes, which was equivalent to an initial conversion price of approximately $7.1272 (the “2030 Conversion Price”) per share of the Company’s common stock. As a result of the reverse stock split described in Note 2— Summary of Significant Accounting Policies under “Basis of Presentation”, the conversion rate was adjusted to 7.0153 shares of common stock per $1,000.00 principal amount, which is equivalent to a conversion price of approximately$142.55 (the “2030 Conversion Price”) per share of the Company’s common stock. The conversion rate is subject to customary adjustments for certain events as described in the related indenture.

The 2030 Convertible Notes will be redeemable, in whole or in part, at the Company’s option, on or after April 5, 2027 if the last reported sale price of the Company’s common stock has been at least 130% of the 2030 Conversion Price then in effect for at least 20 trading days at a redemption price equal to 100% of the principal amount of the 2030 Convertible Notes to be redeemed, plus accrued and unpaid interest.

The Company’s net proceeds from this offering were approximately $232.4 million, net of $7.6 million in debt issuance costs primarily consisting of underwriters, advisory, legal, and accounting fees. The Company used approximately $99.8 million of the net proceeds to purchase and surrender for cancellation approximately $163.0 million aggregate principal amount of the Company’s 2028 Convertible Notes. See 2028 Convertible Notes above for further details on the impacts of the debt extinguishment. On June 30, 2025, the Company exchanged approximately $121.3 million aggregate principal amount of its 2030 Convertible Notesfor a portion of the 2030 Senior Secured Notes, as part of a privately negotiated exchange agreement with certain holders of the 2030 Convertible Notes. See 2030 Senior Secured Notes below for further details.

The outstanding 2030 Convertible Notes balances as of June 30, 2026 and December 31, 2025 are summarized in the following table (in thousands):

The debt discount and debt issuance costs are amortized to interest expense using the effective interest method, computed to be 4.70%, over the life of the 2030 Convertible Notes or its approximately seven-year term.

The following table presents total interest expense recognized related to the 2030 Convertible Notes during the three and six months ended June 30, 2026 and 2025(in thousands):

2030 Capped Call Options

On March 29, 2023 and March 31, 2023, in connection with the pricing of the 2030 Convertible Notes, and on April 3, 2023, in connection with the exercise in full by the 2023 Initial Purchasers of their option to purchase additional 2030 Convertible Notes, the Company entered into capped calls (the “2030 Capped Calls”) with certain counterparties. The Company used $27.8 million of the net proceeds from the 2030 Convertible Notes to pay the cost of the 2030 Capped Calls.

The 2030 Capped Calls had an initial strike price of $7.1272 per share, which corresponds to the initial conversion price of the 2030 Convertible Notes and is subject to anti-dilution adjustments. The 2030 Capped Calls had a cap price of $11.1800 per share, subject to certain adjustments. As a result ofanti-dilution adjustments arising from the reverse stock split describedin Note 2— Summary of Significant Accounting Policies under “Basis of Presentation”, the strike price and cap price were adjusted to $142.544 and $223.60, respectively.

The 2030 Capped Calls are considered separate transactions entered into by and between the Company and the 2030 Capped Calls counterparties, and are not part of the terms of the 2030 Convertible Notes. The Company recorded a reduction to additional paid-in capital of $27.8 million during the second quarter of 2023 related to the premium payments for the 2030 Capped Calls. These instruments meet the conditions outlined in ASC 815 to be classified in stockholders’ deficit and are not subsequently remeasured as long as the conditions for equity classification continue to be met.

2030 Senior Secured Notes and 2030 Private Placement Warrants

2030 Senior Secured Notes

On June 30, 2025, the Company issued $155.4 million aggregate principal amount of its 2030 Senior Secured Notes to holders of the Company’s 2028 Convertible Notes and the Company’s 2030 Convertible Notes in a privately negotiated exchange (the “Exchange”) pursuant to Rule 144A under the Securities Act of 1933, as amended.

The transaction included an exchange of approximately (i) $228.8 million principal amount of the 2028 Convertible Notes and (ii) $121.3 million principal amount of the 2030 Convertible Notes, less amounts in lieu of fractional notes, for the 2030 Senior Secured Notes, warrants to purchase 439,919 shares of common stock (the “2030 Private Placement Warrants”), (iii) $10.0 million of cash proceeds, and accrued and unpaid interest on the exchanged 2028 Convertible Notes and 2030 Convertible Notes. The exchange resulted in a $220.0 million gain on debt extinguishment recorded within other income (expenses), net in the unaudited condensed consolidated statements of operations during the year ended December 31, 2025. The gain on debt extinguishment represented the proportional carrying value of the exchanged 2028 Convertible Notes and 2030 Convertible Notes, which in aggregate was $343.9 million, reduced by the collective fair value of the 2030 Senior Secured Notes of $132.0 million and the fair value of the 2030 Private Placement Warrants of $1.9 million, offset by cash received. The fair value of the 2030 Senior Secured Notes was estimated using a Black Derman-Toy lattice model with a yield of approximately 14.6%, synthetic credit rating for the Company, volatility of 32%, and the risk free rate of 3.79% for the expected term associated with the 2030 secured notes. The fair value of the 2030 Private Placement Warrants was estimated using the Black-Scholes-Merton model based on the Company’s closing strike price on the date of extinguishment of $6.23, volatility of 118.6%, and the risk free rate of 3.79% for the expected term associated with the 2030 secured notes. The Company accrued $5.2 million in debt issuance costs primarily consisting of financial advisory, legal, and accounting fees.

At the Company’s election for any interest period, the 2030 Senior Secured Notes bear interest at a rate of(i)12.0% per year, if interest is paid in kind, subject to a maximum amount of interest able to be paid in kind, and (ii)11.0% per year if interest is paid in cash. In each case, interest is payable semi-annually in arrears in January and July of each year, beginning on January 1, 2026. The 2030 Senior Secured Notes will mature on December 30, 2030 unless redeemed in accordance with their terms prior to such date.

The 2030 Senior Secured Notes will be redeemable, in whole or in part, for cash at the Company’s option at any time, and from time to time, at the following redemption prices: on or after the date of issuance to December 31, 2027, at 105.0% of the principal amount of the notes being redeemed, including interest paid in kind, if any, plus accrued and unpaid interest; from January 1, 2028 to December 31, 2028, at 102.5% of the principal amount of the notes being redeemed, including interest paid in kind, if any, plus accrued and unpaid interest; and on or after January 1, 2029, at 100.0% of the principal amount of the notes being redeemed, including interest paid in kind, if any, plus accrued and unpaid interest.

The 2030 Senior Secured Notes are guaranteed by certain of the Company’s current and future restricted subsidiaries on a senior secured basis. The 2030 Senior Secured Notes and the guarantees has been secured by a first priority lien on substantially all of the assets of the Company and the guarantors, subject to certain exceptions.

The outstanding 2030 Senior Secured Notes balances as of June 30, 2026 are summarized in the following table (in thousands):

On January 1, 2026, the Company elected to exercise its option to pay interest in kind of $4.6 million on its 2030 Senior Secured Notes. Interest paid in kind increases the outstanding principal amount of the 2030 Senior Secured Notes. Per the terms of the 2030 Senior Secured Notes Exchange agreement, there is no additional capacity to pay interest in kind.

The debt discount and debt issuance costs are amortized to interest expense using the effective interest method computed to be 17.2% at the time of issuance of the 2030 Senior Secured Notes.

The following table presents total interest expense recognized related to the 2030 Senior Secured Notes during the three and six ended June 30, 2026(in thousands):

9. WARRANTS

2030 Private Placement Warrants

In connection with the Exchange, the Company issued 439,919 of 2030 Private Placement Warrants under a warrant agreement dated June 30, 2025, each of which entitles the holder to purchaseone share of common stock at an exercise price of$30.00.

Upon issuance, these warrants met the criteria for liability classification, resulting in a warrant liability of$1.9 million. The 2030 Private Placement Warrants were remeasured to fair value as of June 30, 2026, resulting in a warrant liability of$2.2 million. During the six months ended June 30, 2026, the Company recorded a related gain on remeasurement of$2.9 million in “change in fair value of warrant liability” in the condensed consolidated statements of operation. See Note 4— Fair Value Measurementsand Note 8 —Debtfor additional details.

10. COMMON STOCK

At-the-Market Program

On March 6, 2026, the Company entered into an open market sales agreement with Jefferies LLC (the “Agent”), as sales agent and/or principal, providing for an “at-the-market” equity offering program (the “ATM Program”) pursuant to which the Company may issue and sell from time to time shares of its common stock, par value $0.0001 per share, having an aggregate offering value of up to$30.0 million (the “Shares”) to or through the Agent in ordinary brokers’ transactions on the NYSE or otherwise, at market prices prevailing at the time of sale, in block transactions, in negotiated transactions, and in any manner permitted by applicable law or as otherwise agreed with the Agent. As of June 30, 2026,595,303 shares have been sold under the ATM Program.

The following table provides information on shares of common stock sold under the ATM Program during the three months ended June 30, 2026 (dollars in thousands, except per-share amounts):

(1) Net of sales agent commissions

We used the net proceeds received from the sale of the shares for general corporate purposes, including working capital. As of June 30, 2026, we had approximately$24.2 million of remaining capacity available for future issuances under the ATM Program.

11. STOCK-BASED COMPENSATION

Equity Incentive Plans

In May 2024, the Company adopted the Stem, Inc. 2024 Equity Incentive Plan (as amended, the “2024 Plan”). Under the 2024 Plan, the Company may grant stock options, stock appreciation rights, restricted stock, restricted stock units (“RSUs”), and other awards that are settled in shares of the Company’s common stock.

Stock Options

The following table summarizes the stock option activity for the period ended June 30, 2026:

As of June 30, 2026, the Company had approximately $0.3 million of remaining unrecognized stock-based compensation expense for stock options, which is expected to be recognized over a weighted average period of 1.1 years.

Restricted Stock Units

The following table summarizes the RSU activity for the period ended June 30, 2026:

(1) Includes certain restricted stock units with service and market-based vesting criteria.

As of June 30, 2026, the Company had approximately $8.1 million of remaining unrecognized stock-based compensation expense for RSUs, which is expected to be recognized over a weighted average period of 1.5 years.

Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense recorded in each component of operating expenses in the Company’s unaudited condensed consolidated statements of operations for the three and six months ended June 30, 2026 and 2025 (in thousands):

Stock-based compensation expense associated with capitalized research and development expense wasimmaterial for the three months ended June 30, 2026. During the three months ended June 30, 2025, research and development expenses of $0.6 million, corresponding to internal-use software, were capitalized. Stock-based compensation expense associated with capitalized research and development expense wasimmaterial for thesix months ended June 30, 2026. During thesix months ended June 30, 2025, research and development expenses of $0.8 million, corresponding to internal-use software, were capitalized.

12. NET (LOSS) INCOME PER SHARE

Net (loss) income per share is computed by dividing net loss by the basic weighted-average number of shares outstanding during the period. Diluted net loss per share is computed by dividing net loss by the diluted weighted-average number of shares outstanding during the period and, accordingly, reflects the potential dilutive effect of all issuable shares of common stock, including as a result of stock options, restricted stock units, warrants and convertible notes. The diluted weighted-average number of shares used in our diluted net loss per share calculation is determined using the treasury stock method for stock options, restricted stock units, and warrants, and the if-converted method for convertible notes. For periods in which we recognize losses, the calculation of diluted loss per share is the same as the calculation of basic loss per share.

The following table sets forth the computation of basic net (loss) income per share and diluted net loss per share attributable to common stockholders, adjusted on a retroactive basis to reflect the reverse stock split as discussed in Note 2— Summary of Significant Accounting Policies under “Basis of Presentation” (in thousands, except share and per share amounts):

The following table shows total outstanding potentially dilutive shares excluded from the computation of diluted net loss per share attributable to common stockholders as their effect would have been anti-dilutive, adjusted on a retroactive basis to reflect the reverse stock split as discussed in Note 2— Summary of Significant Accounting Policies under “Basis of Presentation”, as of June 30, 2026 and 2025:

13. INCOME TAXES

The following table reflects the Company’s provision for income taxes and the effective tax rates for the periods presented below (in thousands, except effective tax rate):

For the three months ended June 30, 2026, the Company recognized a provision for income taxesof$13 thousand, representing an effective tax rate of (0.09)%, which was lower than the statutory federal tax rate because the Company maintains a valuation allowance on its U.S. deferred tax assets. For thesix months ended June 30, 2026, the Company recognized a provision for income taxes of $0.1 million, representing an effective tax rate of (0.38)%, which was lower than the statutory federal tax rate because the Company maintains a valuation allowance on its U.S. deferred tax assets during the six months ended June 30, 2026.

For the three months ended June 30, 2025, the Company recognized a provision for income taxes of $0.5 million, representing an effective tax rate of 0.23%, which was lower than the statutory federal tax rate because of a favorable impact from the exclusion of cancellation of debt income ("CODI") under Section 108 of the Internal Revenue Code and the Company maintained a valuation allowance on its U.S. deferred tax assets during the three months ended June 30, 2025. For the six months ended June 30, 2025, the Company recognized a provision for income taxes of $0.5 million, representing an effective tax rate of 0.30%, which was lower than the statutory federal tax rate because of a favorable impact from the exclusion of CODI under Section 108 of the Internal Revenue Code and the Company maintained a valuation allowance on its U.S. deferred tax assets during the three months ended June 30, 2025.

14. SEGMENT INFORMATION

The Company’s CODM manages the business and evaluates operating performance based on consolidated net (loss) income. The Company’s CODM uses consolidated net (loss) income to monitor budget versus actual results. We do not allocate assets to individual business units or product lines for internal reporting purposes. Our CODM reviews the Company’s assets on a consolidated basis, and as a result, we do not present segment asset information separately in our consolidated financial statements. The Company operates asone operating segment and hasone reporting segment that constitutes consolidated results.

The following table sets forth the Company’s segment information for revenue and significant expenses (in thousands):

(1) Other segment expenses, net includes impairment of assets held for sale, interest expense and other income, net.

15. COMMITMENTS AND CONTINGENCIES

Contingencies

The Company is party to various legal proceedings from time to time arising in the ordinary course of its business. A liability is accrued when a loss is both probable and can be reasonably estimated. Management believes that the probability of a material loss with respect to any currently pending legal proceeding is remote. However, litigation is inherently uncertain and it is not possible to definitively predict the ultimate disposition of any of these proceedings. As of the date of this filing, the Company does not believe that there are any pending legal proceedings or other loss contingencies that will, either individually or in the aggregate, have a material adverse effect on the Company taken as a whole.

Commitments

In January 2026, the Company recognized a$2.3 million operating lease liability and a corresponding operating lease right-of use asset, which are included in theunaudited condensed consolidated balance sheets as of June 30, 2026, consisting of 15,000 square feet of office space in Gurugram, India. The Company is accounting for this office lease as an operating lease under ASC 842. As of the commencement date of the lease, the remaining lease term was 44 months andbase rent is approximately $44,995 per month.

Non-cancelable Purchase Obligations

During the three and six months ended June 30, 2026, there were no material changes to our non-cancelable purchase obligations.

Non-Income Related Taxes

During 2023, the Company was selected for sales and use tax examination by the state of California and determined that it was not appropriately charging certain customers sales tax and remitting the applicable amounts to the taxing authority for certain revenue arrangements from 2018 through 2022. The Company determined it was probable that it would be subject to sales tax liabilities plus applicable interest in certain states, principally California, and estimated a probable tax liability of $5.6 million. The Company accrued this amount and included it in general and administrative expense in the consolidated statement of operations in 2023. During 2025, the Company accrued additional interest of $0.2 million on the unpaid tax liability, included in interest expense in the unaudited condensed consolidated statements of operations. During 2025, the sales and use tax examination was extended by the state of California to include revenue arrangements for 2022 and 2024. The California sales and use tax examination is ongoing for the period from 2022 through 2024 and the Company is awaiting final ruling on its sales tax administration process and clarity on the required settlement amount. During 2026, the Company accrued additional interest of $0.2 million on the unpaid tax liability, included in interest expense in the unaudited condensed consolidated statements of operations.