Information Services Group Inc.

NOTE 1—DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIO****NS

Information Services Group, Inc. (Nasdaq: III) is a global AI-centered technology research and advisory firm. A trusted partner to more than 900 clients, including 75 of the world’s top 100 enterprises, ISG is a long-time leader in technology and business services that is now at the forefront of leveraging AI to help organizations achieve operational excellence and faster growth. The firm, founded in 2006, is known for its proprietary market data and research, in-depth knowledge and governance of provider ecosystems, and the expertise of its approximately 1,500 professionals worldwide working together to help clients maximize the value of their technology investments.

NOTE 2—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. These consolidated financial statements and footnotes are presented in accordance with accounting principles generally accepted in the United States of America (“GAAP”). All intercompany accounts and transactions have been eliminated in consolidation. Unless the context requires otherwise, references to the Company include ISG and its consolidated subsidiaries.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and revenues and expenses during the periods reported. Actual results may differ from those estimates. The complexity of the estimation process and issues related to the assumptions, risks and uncertainties inherent in the application of the revenue recognition guidance for contracts in which control is transferred to the customer over time affect the amounts of revenues, expenses, contract assets and contract liabilities. Numerous internal and external factors can affect estimates. Estimates are also used for but not limited to allowance for doubtful accounts, useful lives of furniture, fixtures and equipment and definite lived intangible assets, depreciation expense, fair value assumptions in evaluating goodwill for impairment, income taxes and deferred tax asset valuation and the valuation of stock-based compensation.

Business Combinations

We have acquired businesses critical to the Company’s long-term growth strategy. Results of operations for acquisitions are included in the accompanying consolidated statement of comprehensive income from the date of acquisition. Acquisitions are accounted for using the purchase method of accounting and the purchase price is allocated to the net assets acquired based upon their estimated fair values at the date of acquisition. The excess of the purchase price over the net assets is recorded as goodwill. Acquisition-related costs are expensed as incurred and recorded in selling, general and administrative expenses.

Cash and Cash Equivalents

The Company considers all highly liquid instruments with an original maturity of three months or less to be cash equivalents, including certain money market accounts. The Company principally maintains its cash in money market and bank deposit accounts in the United States of America, which typically exceed applicable insurance limits. The Company believes it is not exposed to any significant credit risk on cash and cash equivalents.

Restricted Cash

Restricted cash consists of cash and cash equivalents which the Company has committed for rent deposits and are not available for general corporate purposes.

Accounts Receivable, Contract Assets and Allowance for Doubtful Accounts

Our trade receivables primarily consist of amounts due for services already performed. The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of clients to pay fees or for disputes that affect its ability to fully collect billed accounts receivable. The allowance for these risks is prepared by reviewing the status of all accounts and recording reserves on a specific identification method based on previous experiences and historical bad debts. However, our actual experience may vary from these

estimates. If the financial condition of our clients were to deteriorate, resulting in their inability or unwillingness to pay their invoices, we may need to record additional allowances or write-offs in future periods. To the extent the provision relates to a client’s inability or unwillingness to make required payments, the provision is recorded as bad debt expense, which is classified within selling, general and administrative expense in the accompanying consolidated statement of comprehensive income. Historically, the Company’s bad debt reserves and write-offs have not been significant.

The provision for unbilled services is recorded as a bad debt expense; however, to the extent an adjustment to unbilled relates to fee adjustments and other discretionary pricing adjustments, it is recorded to revenue.

During the fourth quarter of 2023, a client that had engaged the Company for two multi-year projects, which previously commenced in 2021 and 2022, respectively, failed to make payments as per the contracted payment schedule. As a result, the Company ceased performing services under the agreements. After unsuccessful negotiations, the Company provided the client with notice that it would be terminating the respective projects. Accordingly, during the fourth quarter of 2023, the Company recorded through bad debt expense an allowance for doubtful accounts reserve of $4.9 million associated with this client. The specific reserve recorded as of December 31, 2024 represented management’s best estimate of the probable amount of collection related to the outstanding amounts under these agreements. During the three months ended June 30, 2025, after exhausting all collection efforts on one of the projects, the Company wrote-off $3.6 million of the outstanding amounts against the previously established reserve. As all amounts written off were previously fully reserved, there was no incremental impact to the income statement in such period. As of December 31, 2025, $1.3 million of the reserve on the other multi-year project remains. The Company commenced legal action against the client in April 2024 to collect the outstanding receivables on the other multi-year project. On September 3, 2025, the court issued its final non appealable judgement holding the client liable to the Company for approximately $5.6 million, plus applicable legal interest at 5% per annum until full payment is made. The Company is continuing to aggressively pursue collection on this judgement against the former client through asset discovery authorized by court orders, though no assets have yet been identified to satisfy the judgement. As collection efforts are ongoing, actual collections from the client may differ from the Company’s estimate. It is unclear at this time if the court judgement will be satisfied by this client’s assets.

Separately, the Company is currently engaged in litigation with a client over a disputed accounts receivable balance for services rendered. The Company plans to pursue collection of the full outstanding balance of $4.7 million in litigation. As of December 31, 2025, we have not recorded material reserves against this balance. The Company will continue to reassess ultimate collectability and the need for reserves in future periods.

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist primarily of prepaid expenses for insurance, conferences, deposits for facilities, programs, software and promotion items.

Furniture, Fixtures and Equipment, net

Furniture, fixtures and equipment are recorded at cost. Depreciation is computed by applying the straight-line method over the estimated useful life of the assets, which ranges fromtwo tofive years. Leasehold improvements are depreciated over the lesser of the useful life of the underlying asset or the lease term, which generally ranges fromtwo tofive years. Repairs and maintenance are charged to expense as incurred. The cost and accumulated depreciation of assets sold or otherwise disposed of are removed from the accounts and any associated gain or loss thereon is reflected in the accompanying consolidated statement of comprehensive income.

The Company capitalizes internal-use software and website development costs and records these amounts within Furniture, Fixtures and Equipment, net. Accounting standards require that certain costs related to the development or purchase of internal-use software and systems as well as the costs incurred in the application development stage related to its website be capitalized and amortized over the estimated useful life of the software or system. They also require that costs related to the preliminary project stage, data conversion and post implementation/operation stage of an internal-use software development project be expensed as incurred.

During the years ended December 31, 2025 and 2024 the Company capitalized $1.8 million and $3.2 million, respectively, of costs associated with system and website development.

Goodwill

Our goodwill represents the excess of the cost of businesses acquired over the fair value of the net assets acquired at the date of acquisition. Goodwill is not amortized but rather tested for impairment at least annually in accordance with accounting and disclosure requirements for goodwill and other indefinite-lived intangible assets. This test is performed by us during our fourth fiscal quarter or more frequently if we believe impairment indicators are present.

A qualitative assessment is performed to determine whether the existence of events or circumstances leads to a determination that it is more likely than not the fair value of the reporting unit is less than its carrying amount. If, based on the evaluation, it is determined to be more likely than not that the fair value is less than the carrying value then goodwill is tested further for impairment. If the fair value of goodwill is lower than its carrying amount, an impairment loss is recognized in an amount equal to the difference. Subsequent increases in value are not recognized in the financial statements.

There wasno impairment of goodwill during the years ended December 31, 2025 and 2024. There were no indicators identified in 2025 or 2024 that would suggest that it was more likely than not that the Company’s reporting unit was impaired.

Long-Lived Assets

Long-lived assets, excluding goodwill and indefinite-lived intangibles, to be held and used by the Company are reviewed to determine whether any significant change in the long-lived asset’s physical condition, a change in industry conditions or a reduction in cash flows associated with the asset group that contains the long-lived asset. If these or other factors indicate the carrying amount of the asset group, which is the lowest level for which identifiable cash flows exist that are separately identifiable from other cash flows, may not be recoverable, the Company determines whether impairment has occurred through the use of an undiscounted cash flow analysis. If impairment has occurred, the Company recognizes a loss for the difference between the carrying amount and the fair value of the asset group. The fair value of the asset group is measured using market prices or, in the absence of market prices, an estimate of discounted cash flows. Cash flows are generally discounted at an interest rate commensurate with our weighted average cost of capital. Assets are classified as held for sale when the Company has a plan for disposal of certain assets and those assets meet the held for sale criteria.

Debt Issuance Costs

Costs directly incurred in obtaining long-term financing, typically bank and attorney fees, are deferred and are amortized over the life of the related loan. Deferred issuance costs are classified as a direct deduction to the long-term debt in the accompanying consolidated balance sheet. Amortization of debt issuance costs is included in interest expense and totaled $0.2 million as of both December 31, 2025 and 2024.

Revenue Recognition

We recognize our revenues by applying the following five steps: (1) identifying the contract with the customer; (2) identifying the performance obligation(s) in the contract; (3) determining the transaction price; (4) allocating the transaction price to the performance obligation(s); and (5) recognizing revenue when (or as) the Company satisfies the performance obligation(s).

We principally derive revenues from fees for services generated on a project-by-project basis. Prior to the commencement of a project, we reach agreement with the client on rates for services based upon the scope of the project, staffing requirements and the level of client involvement. It is our policy to obtain written agreements from clients prior to performing services or when evidence of enforceable rights and obligations is obtained. In these agreements, the clients acknowledge that they will pay based upon the amount of time spent on the project or an agreed upon fee structure.

Revenues for time and materials contracts, which may include capped fees or “not-to-exceed” clauses, are recognized based on the number of hours worked by our advisors at an agreed upon rate per hour and are recognized in the period in which services are performed. Revenues for time and materials contracts are billed monthly, semimonthly or in accordance with the specific contractual terms of each project. For contracts with capped fees or not-to-exceed clauses, we monitor our performance and fees billed to ensure that revenue is not recognized in excess of the contractually capped fee.

Revenues related to fixed-fee contracts are recognized as value is delivered to the customer, consistent with the transfer of control to the customer over time. Revenue for these contracts is recognized proportionally over the term of the contract using an input method based on the proportion of labor hours incurred as compared to the total estimated labor hours for the fixed-fee contract performance obligations, which we consider the best available indicator of the pattern and timing in which contract performance obligations are fulfilled and control transfers to the customer. This percentage is multiplied by the contracted dollar amount of the project to determine the amount of revenue to recognize in an accounting period. The contracted amount used in this calculation typically excludes the amount the client pays for reimbursable expenses. There are situations where the number of hours to complete projects may exceed our original estimate as a result of an increase in project scope or unforeseen events. The results of any revisions in these estimates are reflected in the period in which they become known.

For managed service implementation contracts, revenue is recognized over time as a percentage of hours incurred to date as compared to the total expected hours of the implementation, consistent with the transfer of control to the customer. For ongoing managed services contract, revenue is recognized over time, consistent with the weekly or monthly fee specified within such arrangements.

We also derive revenues based on negotiating reductions in network and software costs of companies with the entity’s related service providers and providing other services such as audits of network and communication expenses and consultation for network architecture. These contracts can be fixed in fees or can be based on the level of savings achieved related to its communications costs. Additionally, these contracts can also have a fixed component and a contingent component that is based on the savings generated by the Company. For network and software contingency contracts with termination for convenience clauses, revenue is recognized over time due to the existence of provisions for payment for progress incurred to date plus a reasonable profit margin. The contract periods range from a few months to in excess of a year.

We also enter into arrangements for the sale of automation software licenses and related delivery of consulting or implementation services at the same time or within close proximity to one another. Such software-related performance obligations include the sale of on-premises software, hybrid and software-as-a-service licenses, as well as other software-related services. Revenue associated with the software performance obligation is primarily recognized at the point at which the software is installed or access is granted.

Revenue associated with events is recognized at the point of time at which the event occurs and is primarily comprised of sponsorships. Conversely, revenue associated with research subscriptions is recognized over time, as the customer accesses our data or related platforms. In addition, we sell research products for which the revenue is recognized at a point in time upon delivery to the client.

The agreements entered into in connection with a project typically allow our clients to terminate early due to breach or for convenience with 30 days’ notice. In the event of termination, the client is contractually required to pay for all time, materials and expenses incurred by us through the effective date of the termination. In addition, from time to time, we enter into agreements with clients that limit our right to enter into business relationships with specific competitors of that client for a specific time period. These provisions typically prohibit us from performing a defined range of services that we might otherwise be willing to perform for potential clients. These provisions are generally limited tosix totwelve months and usually apply only to specific employees or the specific project team.

When we recognize revenues in advance of billing, those revenues are recorded as contract assets. When we invoice in advance of completing services or earning revenues, those amounts are recorded as contract liabilities.

Reimbursable Expenditures

Amounts billed to customers for reimbursable expenditures are included in revenues and the associated costs incurred by the Company are included in direct costs and expenses for advisors in the accompanying consolidated statement of comprehensive income. Non-reimbursable amounts are expensed as incurred. Reimbursable expenditures totaled $1.9 million and $1.6 million for the years ended December 31, 2025 and 2024, respectively.

Direct Costs and Expenses for Advisors

Direct costs and expenses for advisors include payroll expenses and advisory fees directly associated with the generation of revenues and other program expenses. Direct costs and expenses for advisors are expensed as incurred.

Direct costs and expenses for advisors also include expense accruals for discretionary bonus payments. Bonus accrual levels are adjusted throughout the year based on actual and projected Company performance.

Stock-Based Compensation

We grant restricted stock units with a fair value that is determined based on the closing price of our common stock on the date of grant. Such grants generally vest ratably over aone-to-four-year period for employees and athree-year period for directors. Stock-based compensation expense is recognized ratably over the applicable service period.

We follow the provisions of accounting and disclosure requirements for share-based payments, including the measurement and recognition of all share-based compensation under the fair value method.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash and accounts receivable. The Company places its cash investments with high-quality financial institutions. The Company extends credit to its customers based upon an evaluation of the customer’s financial condition and credit history and generally does not require collateral.

Treasury Stock

The Company makes treasury stock purchases in the open market pursuant to its share repurchase program, which was most recently approved by the Board of Directors on August 1, 2023.

Treasury stock is recorded on the accompanying Consolidated Balance Sheets at cost as a reduction of stockholders’ equity. Shares are released from Treasury at original cost on a first-in, first-out basis, with any gain or loss on the sale reflected as an adjustment to additional paid-in capital.

Foreign Currency Translation

The assets and liabilities of the Company’s foreign subsidiaries are translated into U.S. dollars at exchange rates in effect at the end of the reporting period. Revenue and expense items are translated at average exchange rates for the reporting period. Resulting translation adjustments are included in the accompanying Consolidated Statement of income and Comprehensive Income and Consolidated Statement of Stockholders’ Equity as a component ofAccumulated Other Comprehensive Loss.

The functional currency of the Company and its subsidiaries is the respective local currency. The Company has contracts denominated in foreign currencies, and therefore a portion of the Company’s revenues are subject to foreign currency risks. Transactional currency gains and losses that arise from transactions denominated in currencies other than the functional currencies of our operations are recorded inForeign Currency Translationin the accompanying Consolidated Statement of Comprehensive Income.

Fair Value of Financial Instruments

The carrying value of the Company’s cash and cash equivalents, receivables, accounts payable, other current liabilities and accrued interest approximate fair value.

Fair value measurements were applied with respect to our nonfinancial assets and liabilities measured on a nonrecurring basis, which would consist of measurements primarily to goodwill, intangible assets and other long-lived assets and assets acquired and liabilities assumed in a business combination.

Fair value is the price that would be received upon a sale of an asset or paid upon a transfer of a liability in an orderly transaction between market participants at the measurement date (exit price). Market participants can use market data or assumptions in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market-corroborated or generally unobservable. The use of unobservable inputs is intended to allow for fair value determinations in situations where there is little, if any, market activity for the asset or liability at the measurement date. Under the fair-value hierarchy:

● Level 1 measurements include unadjusted quoted market prices for identical assets or liabilities in an active market;

● Level 2 measurements include quoted market prices for identical assets or liabilities in an active market that have been adjusted for items such as effects of restrictions for transferability and those that are not quoted but are observable through corroboration with observable market data, including quoted market prices for similar assets; and

● Level 3 measurements include those that are unobservable and of a highly subjective measure.

During 2025, there wereno transfers of our financial assets between Level 1, Level 2 or Level 3 measures. Our financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to thefair value measurement.

The following tables summarize assets and liabilities measured at fair value on a recurring basis at the dates indicated:

The fair value measurement of contingent consideration is classified within Level 3 of the fair value hierarchy and reflects the Company’s own assumptions in measuring fair values using the income approach. In developing these estimates, the Company considered certain performance projections, historical results and industry trends. This amount was estimated through a valuation model that incorporated probability-weighted assumptions related to the achievement of these milestones and the likelihood of the Company making payments. These cash outflow projections have then been discounted using a rate of 6.0% for December 31, 2025 and 4.9% for December 31, 2024, respectively.

The following table represents the change in the contingent consideration liability during the years ended December 31, 2025 and 2024:

The Company’s financial statements include outstanding borrowings of $59.2 million at both December 31, 2025 and December 31, 2024, which are carried at amortized cost. The fair value of debt is classified within Level 3 of the fair value hierarchy. The fair value of the Company’s outstanding borrowings was approximately $59.5 million and $59.6 million at December 31, 2025 and December 31, 2024, respectively. The fair values of debt have been estimated using a discounted cash flow analysis based on the Company’s incremental borrowing rate for similar borrowing arrangements. The incremental borrowing rate used to discount future cash flows was 5.3% and 6.4% for December 31, 2025 and 2024, respectively. The Company also considered recent transactions of peer group companies for similar instruments with comparable terms and maturities as well as an analysis of current market conditions and interest rates. In 2025, the Company borrowed $15.0 million and subsequently repaid $15.0 million of the outstanding balance on its revolving credit facility. The Company is currently in compliance with its financial covenants.

Income Taxes

We use the asset and liability method to account for income taxes, including recognition of deferred tax assets and liabilities for the anticipated future tax consequences attributable to differences between financial statement amounts and their respective tax basis. We review our deferred tax assets for recovery. A valuation allowance is established when we believe that it is more likely than not that some portion of its deferred tax assets will not be realized. Changes in the valuation allowance from period to period are included in our tax provision in the period of change.

For uncertain tax positions, we use the prescribed model for assessing the financial recognition and measurement of all tax positions taken or expected to be taken in tax returns. This guidance provides clarification on derecognition, classification, interest and penalties, accounting in interim periods, disclosures and transition. Our provision for income taxes also includes the impact of provisions established for uncertain income tax positions, as well as the related interest.

Recently Issued Accounting Pronouncements.** **

Income Taxes

In December 2023, the Financial Accounting Standards Board (“FASB”) issued updated guidance to enhance the transparency of income tax disclosure by requiring disaggregated information about an entity’s effective tax rate reconciliation, as well as information on taxes paid. This updated guidance is effective for annual periods beginning after December 15, 2024. The Company adopted this standard prospectively by disaggregating the effective tax rate reconciliation and income taxes paid. Refer to Note 16 for more details.

Income Statement Disaggregation

In November 2024, the FASB issued updated guidance ASU 2024-03, to improve the disaggregation of income statement expenses. This guidance requires additional disclosure of certain amounts included in the expense captions presented on the statement of operations as well as disclosures about selling expenses. The ASU is effective on a prospective basis, with the option for retrospective application, for annual periods beginning after December 15, 2026 and interim reporting periods beginning after December 15, 2027. Early adoption is permitted for annual financial statements that have not yet been issued. The Company is in the process of assessing the impact the adoption of this guidance will have on the Company’s financial statement disclosures.

NOTE 3—REVENUE

The majority of our revenue is derived from contracts that can span from a few months to several years. We enter into contracts that can include various combinations of services, which, depending on contract type, are sometimes capable of being distinct. If services are determined to be distinct, they are accounted for as separate performance obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the client and is the unit of account. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. The majority of our contracts have a single performance obligation as the promise to transfer the individual services is not separately identifiable from other promises in the contracts and, therefore, is not distinct. For contracts with multiple performance obligations, the Company allocates the transaction price to each performance obligation using our best estimate of the standalone selling price, or SSP, of each distinct product or service in the contract. The Company establishes SSP based on management’s estimated selling price or observable prices of products or services sold separately in comparable circumstances to similar clients.

Our contracts may include promises to transfer multiple services and products to a client. Determining whether services and products are considered distinct performance obligations that should be accounted for separately versus together may require judgment.

Contract Balances

The timing of revenue recognition, billings and cash collections result in billed accounts receivables, unbilled receivables (contract assets) and customer advances and deposits (contract liabilities). Our clients are billed based on the type of arrangement. A portion of our services is billed monthly based on hourly or daily rates. There are also client engagements in which we bill a fixed amount for our services. This may be one single amount covering the whole engagement or several amounts for various phases, functions or milestones. Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, we sometimes receive advances or deposits before revenue is recognized, resulting in contract liabilities. Contract assets and liabilities are generally reported in the current assets and current liabilities sections of the consolidated balance sheet, at the end of each reporting period, based on the timing of the satisfaction of the related performance obligation(s). For multi-year software sales with annual invoicing, we perform a significant financing component calculation and recognize the associated interest income throughout the duration of the financing period. In addition, we reclassify the resulting contract asset balances as current and noncurrent receivables as receipt of the consideration is conditional only on the passage of time and there are no performance risk factors present. See the table below for a breakdown of contract assets and contract liabilities.

Non-current contract assets of $1.3 million as of December 31, 2025 and $2.7 million as of December 31, 2024 are included in “Other assets” on the Consolidated Balance Sheet.

Revenue recognized for the year ended December 31, 2025 that was included in the contract liability balance at January 1, 2025 was $8.4 million and represented primarily revenue from our fixed-fee, research, and subscription contracts.

Remaining performance obligations

As of December 31, 2025, the Company had $118.9 million of remaining performance obligations, the majority of which are expected to be satisfied within the next year.

Out-of-Period Adjustment

In conjunction with the Company’s close process for the second quarter of 2024, management identified a$0.5 million error related to revenue incorrectly recognized during the third quarter of 2022. Accordingly, the Company recorded a$0.5 million adjustment in the second quarter of 2024 to reduce revenue. Management evaluated the pre-tax impact of this error of$0.5 million on the Company’s previously reported interim and annual financial statement for Q3 2022 and full year 2022 consolidated financial statements and determined that the impact of this misstatement is not material to the consolidated financial statements for any interim or annual periods.

NOTE 4**—**ACQUISITION

Martino & Partners Acquisition

On September 1, 2025, the Company completed the acquisition of Martino & Partners s.r.l. (“Martino & Partners”), a strategic advisory firm serving public and private sectors clients in Italy, for total consideration of EUR 2.0 million (USD 2.3 million) in cash paid at closing; USD 250,000 worth of shares of ISG’s common stock, issued promptly following the closing; and EUR 350,000 (USD 0.4 million) in cash, to be paid no later than April 30, 2028. Martino & Partners will also have the right to receive additional consideration paid via earn-out payments, if certain financial targets are met. The acquisition was accounted for as a business combination in accordance with Accounting Standards Codification (“ASC”) 805,Business Combinations.

The following table summarizes the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed at the acquisition date (in thousands):

The amount of recognized identifiable assets acquired and liabilities assumed as of the acquisition date:

The primary factors that drove the goodwill recognized, the majority of which is deductible for tax purposes, were the inclusion of legacy Martino & Partners workforce and the expansion of the Company’s client base, geographic footprint and capabilities in the European market.

Costs associated with this acquisition are included in the selling, general and administrative expenses in the Consolidated Statement of Income and Comprehensive Income were immaterial during the year ended December 31, 2025.

Based on the valuation and other factors as described above, the purchase price assigned to intangible assets and the amortization period were as follows:

NOTE 5—DIVESTITURES

On October 1, 2024, the Company completed the sale of its Automation business line to UST Global Inc. (“UST”) for$27 million in an all-cash transaction, of which $20 million was paid in cash at closing and$7 million was placed in escrow, with$4 million of the escrowed amount being released within 90 days of closing of the transaction based upon receipt of a consent, delivery of a notice, or the entering into a spin-off agreement with a list of clients whose contracts require one of the foregoing actions. The gain on sale of$4.5 million was recognized in Gain on the sale of business and$2.9 million of disposition expenses was recognized in Selling, general and administrative within the Consolidated Statement of Income and Comprehensive Income for the year ended December 31, 2024. The Company did not report the sale in discontinued operations as it was not a strategic shift that would have a major effect on the Company’s operations and financial results. Based on the achievement of certain contractual requirements for the year ended December 31, 2024, the Company received $2 million of remaining proceeds held in escrow in cash during the first quarter of 2025. Additionally, pursuant to the purchase agreement, which provided for a working capital adjustment, the Company received $0.7 million from UST as final settlement during the third quarter of 2025.

NOTE 6—NET INCOME PER COMMON SHARE

Basic earnings per share is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that would share in the net income of the Company. For the year ended December 31, 2025,2.2 million restricted stock units have not been considered in the diluted earnings per share calculation, as the effect would be anti-dilutive.

The following tables set forth the computation of basic and diluted earnings per share:

NOTE 7—ACCOUNTS RECEIVABLE AND CONTRACT ASSETS

Accounts receivable and contract assets, net of allowance, consisted of the following:

NOTE 8—FURNITURE, FIXTURES AND EQUIPMENT

Furniture, fixtures and equipment consisted of the following:

Depreciation expense was $3.3 million and at both December 31, 2025 and 2024.

NOTE 9—LEASES

The Company recognizes lease expense in the Consolidated Statements of Income and Comprehensive Income on a straight-line basis over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of the lease payments.

The Company leases its office space and office equipment under long-term operating lease agreements that expire at various dates through November 2036, some of which include options to extend the leases for up to 5 years, and some of which included options to terminate the leases withinone year. Under the operating leases, the Company pays certain operating expenses relating to the office equipment and leased property.

In April 2025, the Company entered into a new operatingten-year lease for approximately 17,500 square feet of office space in Stamford, Connecticut and includes annual base rent of $0.9 million, subject to annual escalation of 2% with an option to terminate the lease effective on the seventh anniversary of the rent commencement date. The lease commencement date was September 2025, and the rent commencement date is expected to be November 2026.

The components of lease expense were as follows:

Supplemental balance sheet information related to leases was as follows:

Maturities of lease liabilities were as follows:

NOTE 10—INTANGIBLE ASSETS

The carrying amount of intangible assets, net of accumulated amortization and impairment charges, as of December 31, 2025 and 2024 consisted of the following:

Amortization expense was $1.3 million and $2.6 million for the years ended December 31, 2025 and 2024, respectively. The estimated future amortization expense subsequent to December 31, 2025 is as follows:

NOTE 11—GOODWILL

The changes in the carrying amount of goodwill for the years ended December 31, 2025 and 2024 are as follows:

NOTE 12—ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

The components of accrued liabilities and other current liabilities for the years ended December 31, 2025 and 2024 are as follows:

NOTE 13—FINANCING ARRANGEMENTS AND LONG-TERM DEBT

Long-term debt consists of the following:

The revolving loan repayment of the outstanding principal amount and interest payment is due on the maturity date of February 22, 2028.

On February 22, 2023, the Company amended and restated its senior secured credit facility to increase the revolving commitments per the revolving facility from $54.0 million to $140.0 million and eliminate its term loan (as further amended on June 27, 2024, the “2023 Credit Agreement”). The material terms under the 2023 Credit Agreement are as follows. Capitalized terms used but not defined herein have the meanings ascribed to them in the 2023 Credit Agreement:

The Company’s financial statements include outstanding borrowings of $59.2 million at both December 31, 2025 and December 31, 2024, which are carried at amortized cost. The fair value of debt is classified within Level 3 of the fair value hierarchy. The fair value

of the Company's outstanding borrowings was approximately $59.5 million and $59.6 million at December 31, 2025 and December 31, 2024, respectively. The fair values of debt have been estimated using a discounted cash flow analysis based on the Company's incremental borrowing rate for similar borrowing arrangements. The incremental borrowing rate used to discount future cash flows was 5.3% and 6.4% as of December 31, 2025 and December 31, 2024, respectively. The Company also considered recent transactions of peer group companies for similar instruments with comparable terms and maturities as well as an analysis of current market conditions and interest rates. In 2025, the Company borrowed $15.0 million and subsequently repaid $15.0 million of its revolving credit facility. The Company is currently in compliance with its financial covenants.

NOTE 14—COMMITMENTS AND CONTINGENCIES

The Company is subject to contingencies which arise through the ordinary course of business. Management believes that all material liabilities of which it is aware are properly reflected in the financial statements at December 31, 2025 and 2024.

Martino & Partners Contingent Consideration

As of December 31, 2025, the Company has recorded a liability of EUR 0.3 million (USD 0.4 million), representing the estimated fair value of contingent consideration related to the acquisition of Martino & Partners, which was classified as non-current and included in other liabilities on the Consolidated Balance Sheets.

Ventana Research Contingent Consideration

On October 31, 2023, a subsidiary of the Company executed an Asset Purchase Agreement with Ventana Research, Inc. (“Ventana Research”) and consummated the acquisition of substantially all assets, and assumption of certain liabilities, of Ventana Research. The purchase price was comprised of $1.0 million of cash consideration paid at closing.

The Company paid $0.2 million in April 2024, which was related to 2023 performance. The Company no longer has a related liability as of December 31, 2025.

Change 4 Growth Contingent Consideration

On October 31, 2022, a subsidiary of the Company executed an Asset Purchase Agreement with Change 4 Growth, LLC (“Change 4 Growth”) and consummated the acquisition of substantially all the assets, and assumption of certain liabilities, of Change 4 Growth. The purchase price was comprised of$3.8 million of cash consideration and,$0.6 million of shares of ISG common stock issued promptly after

closing. Change 4 Growth also had the right to receive additional consideration paid via earn-out payments, if certain financial targets were met.

The Company paid $0.5 million in cash consideration in April 2025, which was related to the Company’s 2024 performance. The Company no longer has a related liability as of December 31, 2025.

Legal Reserves

From time to time, the Company is a party to litigation, claims and other contingencies, including regulatory and employee matters as well as examinations and investigations by governmental agencies, which arise in the ordinary course of business. The Company records a contingent liability when it is probable that a loss has been incurred and the amount of loss is reasonably estimable in accordance with ASC Topic 450, Contingencies, or other applicable accounting standards. Such reserves are included in accrued liabilities on the condensed consolidated balance sheets. Based on the information available at the present time, the Company is unable to predict the ultimate outcome of any litigation or claims. However, the Company intends to vigorously defend its legal position on all claims and, to the extent necessary, seek recovery.

NOTE 15—RELATED PARTY TRANSACTIONS

From time to time, the Company may have receivables and payables with employees and shareholders. The Company had no material outstanding receivables from related parties, including shareholders, at both December 31, 2025 and 2024, andno outstanding payables.

NOTE 16—INCOME TAXES

The components of income before income taxes for the years ended December 31, 2025 and 2024 consist of the following:

The components of the 2025 and 2024 income tax provision are as follows:

The differences between the effective tax rates reflected in the total provision for income taxes and the U.S. federal statutory rate of 21% for each of the years ended December 31, 2025 and 2024 were as follows:

State and local income tax expense was primarily attributable to Illinois, New York, Texas, California, and New Jersey, which together comprised more than 50% of total state and local tax expense for the period ended December 31, 2025.

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities were as follows:

A valuation allowance was established at December 31, 2024 for the Company’s U.S. capital loss carryforward that was generated from the sale of the Company’s automation business in 2024. A valuation allowance was established at December 31, 2024 and 2023 due to estimates of future utilization of net operating loss carryovers in the U.S. and certain foreign jurisdictions, derived primarily from acquisitions and recorded through purchase accounting. The valuation allowance at December 31, 2024 and 2023 also includes a full valuation for the Company’s foreign tax credit carryovers and foreign taxes on certain controlled foreign corporations.

As of December 31, 2025, the Company had foreign net operating loss (NOL) carryforwards of approximately $27.4 million. If not utilized, these NOL carryforwards begin to expire in 2026. The Company also has a federal tax credit carryforward of approximately $3.1 million, which will begin to expire in 2027, if not utilized. As of December 31, 2025, the Company has a tax capital loss carryforward of $7.6 million as a result of the sale of the automation business. If not utilized, the carryforward will expire in 2029.

Uncertain tax positions

Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more likely than not recognition threshold is measured at the largest amount of benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more likely than not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more likely than not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. It is the Company’s policy to accrue for interest and penalties related to its uncertain tax positions within income tax expense.

A tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period is as follows:

We do not expect our unrecognized tax benefits to significantly change in the next twelve months.

The Company has recognized through income tax expense approximately $1.1 million of interest and penalties related to uncertain tax positions. The amount of unrecognized tax benefit, if recognized, that would impact the effective tax rate is $1.8 million. With few exceptions, the Company is no longer subject to U.S. federal, state, local or non-U.S. income tax examinations by tax authorities for years before 2017.

Net cash paid (refunds received) for income taxes are as follows:

NOTE 17—STOCK-BASED COMPENSATION PLANS

The Amended and Restated 2007 Equity and Incentive Award Plan (the “Incentive Plan”) and Amended and Restated 2007 Employee Stock Purchase Plan (“ESPP” and collectively with the Incentive Plan, the “Plans”) were approved by the Company’s stockholders at our 2014 annual meeting, with subsequent amendments to the Plans being approved by the Company’s stockholders at our 2017, 2020 and 2025 annual meetings and a subsequent amendment to the ESPP being approved by the Company’s stockholders at our 2020 and 2025 annual meetings. Subject to the terms of the Incentive Plan, the Incentive Plan authorizes the grant of awards, which awards may be made in the form of (i) nonqualified stock options; (ii) stock options intended to qualify as incentive stock options under Section 422 of the Internal Revenue Code (stock options described in clause (i) and (ii), “options”); (iii) stock appreciation rights (“SARs”); (iv) restricted stock and/or restricted stock units; (v) other stock based awards; (vi) performance-based awards, which are equity awards or incentive awards intended to qualify for full tax deductibility by the company under Code Section 162 (m); and (vii) incentive awards, a cash-denominated award earnable by achievement of performance goals. The issuance of shares or the payment of cash upon the exercise

of an award or in consideration of the cancellation or termination of an award shall reduce the total number of shares available under the Incentive Plan, as applicable. The provisions of each award will vary based on the type of award granted and will be specified by the Compensation Committee of the Board of Directors. Those awards which are based on a specific contractual term will be granted with a term not to exceedten years. The SARs granted under the Incentive Plan are granted with an exercise price equal to the fair market value of the Company’s common stock at the time the SARs are granted.

At the 2025 annual meeting, our stockholders approved (i) an amendment to the Incentive Plan to increase the number of shares of common stock available for issuance under such plan by 4,400,000 shares (the “Incentive Plan Amendment”) and (ii) an amendment to the ESPP to increase the number of shares of common stock available for issuance under the ESPP by 1,200,000 shares. As of December 31, 2025, there were 3,972,167 and 1,447,958 shares available for grant under the Incentive Plan and ESPP, respectively.

The Company recognized $7.8 million and $8.0 million in employee stock-based compensation expense during the years ended December 31, 2025 and 2024, respectively. This expense was recorded in selling, general and administrative in the Consolidated Statement of Income Comprehensive Income.

Restricted Share Awards/Units

The Incentive Plan provides for the granting of restricted share units (“RSUs”), the vesting of which is subject to conditions and limitations established at the time of the grant. Recipients of RSU awards will not have the rights of a shareholder of the Company until such date as the shares of common stock are issued or transferred to the recipient. If the employee retires (at the normal retirement age stated in the applicable retirement plan or applicable law, if there is a mandatory retirement age), the restricted shares continue to vest on the same schedule as if the employee remained employed with the Company. Upon a termination of employment due to an employee’s death or permanent disability, the restricted shares become 100% vested. Dividends accrue and will be paid if and when the restricted shares vest.

The Company has also granted RSUs to specific employees which have the following characteristics:

● *Performance-Based RSU Vesting (Stock Price):*Provided the employee continues to be employed through the specific date set forth in the award, the RSUs will vest on such date if specific financial performance conditions are met, otherwise the RSUs will be forfeited.

● *Time-Based RSU Vesting:*So long as the employee continues to be employed through the anniversary of the grant date, the RSUs will become 100% vested on such date.

If an employee’s employment is terminated (i) at any time during the vesting period due to the employee’s death, disability or retirement prior to the applicable vesting date or (ii) so long as the employee continues to be employed through the vesting dates detailed in the award agreement, the RSUs will become vested according to the agreement. However, no shares will be distributed until the applicable pro rata vesting date (and, in the case of the Performance-Based RSUs, only if and to the extent that the performance target is achieved). In all other terminations occurring prior to the applicable vesting date, the RSUs will expire. Pursuant to the terms of the Incentive Plan, in the event of a change in control, the Compensation Committee of the Board of Directors may accelerate vesting of the outstanding awards of RSUs then held by participants. All RSUs will be payable in shares of the Company’s common stock immediately upon vesting. As part of the Incentive Plan Amendment, dividends/dividend equivalents may be paid or credited on other stock-based awards (such as restricted stock units), but those dividends/dividend equivalents must be subject to the same vesting (or more stringent vesting) applicable to the underlying awards.

The fair value of RSUs is determined based on the closing price of the Company’s common stock on the grant date. The total fair value is amortized to expense on a straight-line basis over the vesting period and forfeitures are accounted for as they occur.

A summary of the status of the Company’s RSUs issued under its Incentive Plan as of December 31, 2025, and changes during the years then ended, is presented below:

The total fair value of RSUs vested during the years ended December 31, 2025 and 2024 was $8.2 million and $7.3 million, respectively. As of December 31, 2025, there was $9.3 million of unrecognized compensation cost related to RSUs, which is expected to be recognized over a weighted-average period of 1.7 years. There were 5.4 million shares of common stock available for issuance at December 31, 2025 under the Incentive Plan.

Employee Stock Purchase Plan

The Company uses the Black-Scholes option pricing model to estimate the fair value of shares expected to be issued under the Company’s employee stock purchase plan. The ESPP provides that a total of 4.8 million shares of common stock is reserved for issuance under the plan. The ESPP, which is intended to qualify as an “employee stock purchase plan” under Section 423 of the Internal Revenue Code, is implemented utilizing three-month offerings with purchases occurring atthree-month intervals. The ESPP administration is overseen by the Compensation Committee of the Company’s Board of Directors. Employees are eligible to participate if they are employed by the Company for at least 20 hours per week and more than five months in a calendar year. The ESPP permits eligible employees to purchase common stock through payroll deductions, ranging fromone toten percent of their eligible earnings subject to IRS regulated cap of $25,000. The price of common stock purchased under the ESPP is 90% of the fair market value of the common stock on the applicable purchase date. Employees may end their participation in an offering at any time during the offering period, and participation ends automatically upon termination of employment. The Compensation Committee may at any time amend or terminate the ESPP, except that no such amendment or termination may adversely affect shares previously granted under the ESPP. The Company may issue new shares for the ESPP using treasury shares or newly issued shares.

For the year ended December 31, 2025, the Company issued 149,779 shares for the ESPP. There were 1,447,958 shares available for purchase as of December 31, 2025 under the ESPP.

NOTE 18—SEGMENT AND GEOGRAPHICAL INFORMATION

The Company operates inone segment, fact-based sourcing Advisory Services. The Company operates principally in the Americas, Europe and Asia Pacific. The Company’s foreign operations are subject to local government regulations and to the economic and political uncertainties of those areas.

The Company Chief Operating Decision Maker ( the “CODM”) is our Chairman & Chief Executive Officer, Michael Connors. The CODM uses net income as presented on our Consolidated Statement of Income and Comprehensive Income in evaluating performance and determining how to allocate resources of the company as a whole.

Geographical information for the segment is as follows:

The segregation of revenues by geographic region is based upon the location of the legal entity performing the services. The Company does not measure or monitor gross profit or operating income by geography or any other measure or metric, other than consolidated, for the purposes of making operating decisions or allocating resources.

(1)Other segment expenses include communication, occupancy, marketing, stock-based compensation, acquisition- and-disposition and other overhead expenses.

NOTE 19—SUBSEQUENT EVENT

On March 3, 2026, the Company’s Board of Directors approved a first-quarter dividend of $0.045 per share, payable March 26, 2026, to shareholders of record as of March 20, 2026. The dividends are accounted for as a decrease to Stockholders’ Equity. All future dividends will be subject to the Board’s prior approval.

EXHIBIT INDEX

• Filed herewith.