Oncology Institute, Inc.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

As of December 31, 2025 and 2024 and for the years ended December 31, 2025 and 2024

(US Dollars in thousands, except share data)

Note 1. Description of the Business

Overview of the Business

The Oncology Institute, Inc. (“TOI”) was formerly known as DFP Healthcare Acquisitions Corp. ("DFPH"). DFPH was a Delaware corporation originally formed in 2019 as a publicly-traded special purpose acquisition company for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization, or similar business combination ("Business Combination"). TOI's wholly-owned subsidiary The Oncology Institute, LLC (which was formerly known as TOI Parent, Inc.) wasoriginally founded in 2007 and is a leading, national platform delivering integrated direct care and cost management to patients and payors who are experiencing or managing members undergoing treatment for cancer and other complex medical conditions.

On November 12, 2021 ("Closing Date"), the Business Combination closed following a series of mergers, which resulted in DFPH emerging as the parent of the combined entity Orion Merger Sub II, LLC and the former TOI Parent (together, "Legacy TOI"). DFPH was renamed “The Oncology Institute, Inc.” and common stock and "Public Warrants" continued to be listed on Nasdaq under the ticker symbols “TOI” and “TOIIW,” respectively.

Through wholly-owned subsidiaries (including TOI Management, LLC (“TOI Management”)) and affiliated entities, TOI operates combined community clinics and infusion suites staffed with providers who administer latest-generation cancer treatments including chemotherapy, immunotherapy, oncolytics, and radiation oncology. Additionally, TOI provides coordinated case management, drug formulary management, and fully-delegated networks of care providers, all of which we use to drive improved treatment outcomes at an affordable cost to our patients and payors. Additionally, TOI operates a specialty pharmacy that includes both in-office and mail-order dispensing for complementary oral and self-injectable medications taken by our patients concurrent with their in-office cancer therapies.

On March 31, 2025, the Company entered into a Research Services Agreement ("RSA") with Helios CR, Inc. ("Helios"), effective May 5, 2025, pursuant to which the Clinical Trials segment is operated by Helios in its entirety under a profit sharing arrangement with the Company. As part of the RSA, there is a Transition Services Agreement, in which certain administrative and professional services are provided by Helios for a certain period of time. Additionally, the Company pays a management fee to Helios on a periodic basis for certain shared services. The Company recognized a $2,398 loss due to the write-off of the segment's net assets for the year ended December 31, 2025

The Company has 116 oncologists and mid-level professionals across 65 clinic locations located within five states: California, Florida, Arizona, Oregon, and Nevada. The Oncology Institute CA, a Professional Corporation ("TOI CA"), one of the TOI PCs, is comprised of the clinic locations in California, Nevada, and Arizona. The Company has contractual relationships with multiple payors, serving Medicare, including Medicare Advantage, Medi-Cal, and commercial patients.

Note 2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States ("U.S. GAAP").

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of TOI, its subsidiaries, all of which are controlled by TOI through majority voting control, and variable interest entities (“VIE”) for which TOI (through TOI Management) is the primary beneficiary. The Company consolidates entities in which it has a controlling financial interest based on either the variable interest entity or voting interest model. All significant intercompany balances and transactions have been eliminated in consolidation.

Variable Interest Entities

The Company consolidates entities for which it has a variable interest and is determined to be the primary beneficiary. Noncontrolling interests in less-than-wholly-owned consolidated subsidiaries of the Company are presented as a component of total equity to distinguish between the interests of the Company and the interests of the noncontrolling owners. Revenues, expenses, and net income (loss) from these subsidiaries are included in the consolidated amounts as presented on the Consolidated Statements of Operations.

The Company holds variable interests in TOI's Personal Corporations ("TOI PCs") , which it cannot legally own, as a result of entering into master services agreements ("MSAs"). As of December 31, 2025, TOI held variable interests in TOI CA, The Oncology Institute FL, LLC, a Professional Corporation ("TOI FL"), The Oncology Institute OR, a Professional Corporation ("TOI OR"), and The Oncology Institute TX, a Professional Corporation ("TOI TX") (collectively, the TOI PCs), all of which are VIEs. The Company is the primary beneficiary of the TOI PCs and thus, consolidates the TOI PCs in its financial statements. As discussed in Note 16, the noncontrolling shareholders hold nominal interests in the VIEs and do not participate in the income or loss of the VIEs.

Liquidity

The accompanying consolidated financial statements have been prepared on a going concern basis of accounting, which contemplates continuity of operations, realization of assets and liabilities and commitments in the normal course of business. In connection with the preparation of the consolidated financial statements for the year ended December 31, 2025, the Company conducted an evaluation as to whether there were conditions and events, considered in the aggregate, which raised substantial doubt as to its ability to continue as a going concern within one year after the date of the issuance of such financial statements. The Company had cash and cash equivalents of $33,565 and an accumulated deficit of $271,419 at December 31, 2025, and a net loss of $60,606 and net cash used in operating activities of $24,587 for the year ended December 31, 2025. In February 2025, the Company entered into an Amendment to the Facility Agreement (see Note 11 - Debt) in which the Company made a partial prepayment of approximately $20 million together with accrued and unpaid interest. Among other items, the Amendment provided for the removal of the financial covenant that required the Company to hold at least $40 million of cash and cash equivalents. Also, the Company entered into a securities purchase agreement for a private placement that resulted in gross proceeds of approximately $16.5 million to the Company before deducting placement agent fees and offering expenses. Additionally, in August 2025 through October 2025, the Company raised approximately $13.8 million in net proceeds from a at-the-market offering.

The Company has also taken a number of other actions to increase cash flow. As one of our strategic priorities in 2025 and beyond, the Company implemented an initiative to reduce negative cash flow from operations.

Accordingly, the Company has concluded that it will have sufficient liquidity to fund its operations for at least one year from the date these consolidated financial statements are issued. Although the Company currently expects its sources of capital to be sufficient to meet its near-term liquidity needs, there can be no assurance that such sources will be sufficient to satisfy its liquidity requirements in the future. If the Company cannot generate or obtain needed funds, it might be forced to make substantial reductions in its operating and capital expenses or pursue restructuring plans, which could adversely affect its business operations and ability to execute its current business strategy.

Business Combinations

The Company accounts for all transactions that represent business combinations using the acquisition method of accounting under Accounting Standards Codification Topic No. 805, Business Combinations(“ASC 805”). The Company first assesses whether an acquisition constitutes a business combination or asset acquisition by applying the screening test and analyzing whether the acquired entity has substantive inputs, processes, and the ability to produce outputs. Upon concluding an acquisition is a business combination, per ASC 805, the identifiable assets acquired, the liabilities assumed, and any noncontrolling interest in the acquired entity are recognized and measured at their fair values on the date an entity obtains control of the acquiree. Such fair values that are not finalized for reporting periods following the acquisition date are estimated and recorded as provisional amounts. Adjustments to these provisional amounts during the measurement period (defined as the date through which all information required to identify and measure the consideration transferred, the assets acquired, the liabilities assumed, and the noncontrolling interests obtained, limited to one year from the acquisition date) are recorded when identified. Goodwill is determined as the excess of the fair value of the consideration exchanged in the acquisition over the fair value of the net assets acquired.

Segment Reporting

The Company presents the financial statements by segment in accordance with Accounting Standard Codification Topic No. 280, Segment Reporting(“ASC 280”) to provide investors with transparency into how the chief operating decision maker (“CODM”) manages the business. The Company determined the CODM is its Chief Executive Officer. The CODM reviews financial information and allocates resources across three operating segments: patient services, specialty pharmacy, and clinical trials & other. Each of the operating segments is also a reporting segment as described further in Note 19.

Use of Estimates

The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could materially differ from those estimates under different assumptions or conditions. Significant items subject to such estimates and assumptions include judgments related to fee-for-service ("FFS") revenue recognition, estimated FFS accounts receivable and the allowance for credit losses, useful lives and recoverability of long-lived assets, recoverability of goodwill, fair value of share-based compensation, fair value of liability classified instruments, and judgments related to deferred income taxes.

Net Loss Per Share

Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. The Company's Series A Convertible Preferred Stock is classified as a participating security in accordance with ASC 260. Under the two-class method, basic and diluted net loss per share attributable to common stockholders is computed by dividing the basic and diluted net loss attributable to common stockholders by the basic and diluted weighted-average number of shares of common stock outstanding during the period. Diluted net income per share attributable to common stockholders adjusts basic net income per share for the potentially dilutive impact of stock options, restricted stock units, Medical RSUs (defined in Note 14), earnout shares (defined in Note 14), public warrants, private placement warrants, and Senior Secured Convertible Notes (defined in Note 11).

The treasury stock method is used to calculate the potentially dilutive effect of stock options, RSUs, public warrants, and private placement warrants. The if-converted method is used to calculate the potentially dilutive effect of the Senior Secured Notes. In both methods, diluted net income (loss) attributable to common stockholders and diluted weighted-average shares outstanding are adjusted to account for the impact of the assumed issuance of potential shares of common stock that are dilutive, subject to dilution sequencing rules. The earnout shares are contingently issuable; therefore, the earnout shares are excluded from basic and diluted net income (loss) per share until the market conditions have been met (see more detail on the earnout shares in Note 14). The Medical RSUs are also contingently issuable; therefore, they are excluded from basic net income (loss) per share until the performance and service conditions have been met (see more detail in Note 14). Further, the number of contingently issuable Medical RSUs included in diluted net income (loss) per share is based on the number of shares, if any, that would be issuable if the end of the reporting period were the end of the contingency period and if the result would be dilutive. For the periods presented, the public and private placement warrants are out of the money; therefore, the public and private placement warrants are anti-dilutive and excluded from diluted net loss per share.

Revenue Recognition

The Company follows the accounting requirements of Accounting Standard Codification Topic No. 606, Revenue from Contracts with Customers(“ASC 606”). The core principle of ASC 606 is to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration the entity expects to be entitled in exchange for those goods or services. This principle is achieved through applying the following five-step approach:

1. Identification of the contract, or contracts, with a customer.

2. Identification of the performance obligations in the contract.

3. Determination of the transaction price.

4. Allocation of the transaction price to the performance obligations in the contract.

5. Recognition of revenue when, or as, an entity satisfies a performance obligation.

The Company receives payments from the following sources for services rendered and when prescriptions are delivered: (i) commercial insurers; (ii) the federal government under the Medicare program administered by the Centers for Medicare and

Medicaid Services (“CMS”); (iii) state governments under the Medicaid and other programs; (iv) other third-party payors (e.g., hospitals and independent practice associations (“IPAs”)); and (v) individual patients and clients.

Revenue primarily consists of capitation revenue, FFS revenue, specialty pharmacy revenue, and clinical trials revenue. Revenue is recognized in the period in which services are rendered and prescriptions are delivered or the period in which the Company is obligated to provide services. The form of billing and related risk of collection for such services may vary by type of revenue and the payor. The following paragraphs provide a summary of the principal forms of the Company’s billing arrangements and how revenue is recognized for each.

Capitation revenues of the Company consist primarily of fees for medical services provided to patients by the Company under a capitated arrangement with various managed care organizations. Capitation revenue is paid monthly to the Company based on the number of enrollees assigned to the Company by the contracted managed care organization (per member, per month; or “PMPM”). Capitation contracts generally have a legal term of one year or longer. Capitation contracts have a single performance obligation that is a stand ready obligation to perform healthcare services to the population of enrolled members and constitutes a series for the provision of managed healthcare services for the term of the contract, which is deemed to be one month since the mix of patient-customers can and do change month over month. The transaction price for capitation contracts is variable as it primarily includes PMPM fees associated with unspecified membership that fluctuates throughout the contract. The Company generally estimates the transaction price using the most likely methodology and amounts are only included in the transaction price to the extent that it is probable that a significant reversal of cumulative revenue will not occur once any uncertainty is resolved. Certain contracts include terms for a capitation deduction where the cost of out-of-network referrals of members by the Company are deducted from the future payment. The deductions vary depending on the payor and are often not known until a future period. As such, the Company adjusts the transaction price for capitation deductions based on historic experience such that the capitation revenue is recognized to the extent that it is not probable a significant reversal of revenue will occur in the future. The performance obligation is rendered in the period that the Company stands ready to provide the service on the basis of the transaction price established at that time. If subsequent information resolves uncertainties related to the transaction price, adjustments will be recognized in the period they are resolved. When payment has been received but services have not yet been rendered, the payment is recognized as a contract liability.

Fee-for-Service Revenue

Fee-for Service (FFS) revenue represents revenue earned under contracts in which the Company bills and collects for medical services rendered by the Company’s employed or contracted physicians. The terms for FFS contracts are short in duration and only last for the period over which services are rendered (typically, one day). FFS revenue consists of fees for medical services provided to patients. These medical services are capable of being distinct since the patient can benefit from the medical services on their own. Each service constitutes a single performance obligation for which the patient accepts and receives the benefit of the medical services as they are performed.

Under the FFS arrangements, the Company bills third-party payors and patients for patient care services provided. Payments for services provided are generally less than billed charges. The Company records revenue net of an allowance for contractual adjustments, which represents the net revenue expected to be collected from third-party payors (including managed care, commercial, and governmental payors such as Medicare and Medicaid), and patients. These expected collections are based on fees and negotiated payment rates in the case of third-party payors, the specific benefits provided for under each patient’s healthcare plans, mandated payment rates in the case of Medicare and Medicaid programs, and historical gross charges and cash collections (net of recoveries).

The transaction price from FFS arrangements is variable in nature because fees are based on patient encounters, credits due to patients, and reimbursement of provider costs, all of which can vary from period to period. The Company estimates the transaction price using the most likely methodology and amounts are only included in the net transaction price to the extent that it is probable that a significant reversal of cumulative revenue will not occur once any uncertainty is resolved. As a practical expedient, the Company uses a portfolio approach to determine the transaction price for the medical services provided under FFS arrangements. Under this approach, the Company bifurcates the types of services provided and grouped health plans with similar fees and negotiated payment rates. At these levels, portfolios share the characteristics conducive to ensuring that the results do not materially differ from the standard applied to individual patient contracts related to each medical service provided.

The recognition of net revenue (gross charges less contractual allowances) from such services is dependent on such factors as proper completion of medical charts following a patient visit, the forwarding of such charts to the Company’s billing center for medical coding and entering into the Company’s billing system, and the verification of each patient’s submission or representation at the time services are rendered as to the payor(s) responsible for payment of such services. Revenue is recorded on the date the services are rendered based on the information known at the time of entering of such information into the Company’s billing systems as well as an estimate of the revenue associated with medical services. When the performance obligation is not satisfied, the billing is recognized as a contract liability. There are no contract liabilities as of December 31, 2025 and 2024 related to FFS revenue.

The Company sells oral prescription drugs directly through its dispensaries and pharmacy. Each prescription filled and delivered to the customer is a distinct performance obligation. The transaction price for the prescriptions is based on fee schedules set by various pharmacy benefit managers (“PBMs”) and other third party payors. The fee schedule is often subject to Direct and Indirect Remuneration (DIR) fees, which are based primarily on pre-established metrics. DIR fees are assessed at the time of payment. The Company recognizes revenue based on the transaction at the time the customer takes possession of the oral drug. DIR fees are reflected in the net reimbursements received.

Clinical Trials & Other Revenue

The Company enters into contracts to perform clinical research trials. The terms for clinical trial contracts last many months as the clinical research is performed. Each contract represents a single, integrated set of research activities and thus is a single performance obligation. The performance obligation is satisfied over time as the output is captured in data and documentation that is available for the customer to consume over the course of arrangement and furthers progress of the clinical trial. Under the clinical trial contracts, the Company receives a fixed payment for administrative, set-up, and close-down fees; a fixed amount for each patient site visit; and certain expense reimbursements. Under ASC 606, the Company has elected to recognize revenue for these arrangements using the ‘as-invoiced’ practical expedient. The Company invoices the customer periodically based on the progress of the trial such that each invoice captures the revenue earned to date based on the state of the trial as established between the Company and the customer and corresponds directly to the value to the customer of the Company’s performance completed to date.

Direct Costs of Sales

Direct cost of sales primarily consists of wages paid to clinical personnel and other health professionals, oral and IV drug costs, and other medical supplies used to provide patient care. The Company’s costs for clinical personnel wages are expensed as incurred and the Company’s costs for inventory and medical supplies are expensed when used, generally by applying the specific identification method.

Cash and Cash Equivalents

Cash primarily consists of deposits with banking institutions. The Company considers all highly liquid investments that are both readily convertible into cash and mature within three months from the date of purchase to be cash equivalents.

Accounts Receivable and Allowance for Credit Losses

The Company’s accounts receivables are recorded and stated at the amount expected to be collected determined by each payor, net of an allowance for credit losses, under ASC Topic No. 310, Receivables(“ASC 310”). In accordance with ASC Topic No. 326, Financial Instruments — Credit Losses(“ASC 326”), the Company recognizes credit losses based on a forward-looking current expected credit losses (“CECL”) model. The Company segregates accounts receivables into portfolio segments based on shared risk characteristics, such as line of business and payor type, for evaluation of expected credit losses. The Company makes estimates of expected credit losses based upon its assessment of various factors, including the age of accounts receivable balances, default-based statistics, current economic conditions, reasonable and supportable forecasts of future economic conditions, and other factors that may affect its ability to collect from customers. The allowance for credit losses is developed using a loss rate method and is recognized in the Consolidated Statement of Operations. The uncollectible accounts receivables are written off on a quarterly basis in the period when collection activities cease due to a final determination that all or a portion of the balance is no longer collectible and if there is no pending litigation activity related to the receivable. No allowance for credit losses was recorded as of December 31, 2025 and 2024.

Inventories

The Company accounts for inventory under Accounting Standard Codification Topic No. 330, Inventory(“ASC 330”). Inventories consist of intravenous chemotherapy drugs and oral prescription drugs. Inventories are stated at the lower of cost, determined using the weighted average cost method of inventory valuation, or net realizable value. Net realizable value is determined using the selling price, less costs to sell.

The Company receives purchase discounts on products purchased. Contractual arrangements with vendors, including manufacturers and wholesalers, normally provide for the Company to receive purchase discounts from established list prices in one, or a combination, of the following forms: (i) a direct discount at the time of purchase or (ii) a discount for the prompt payment of invoices. Additionally, in other circumstances, the Company may receive rebates when products are purchased indirectly from a manufacturer (e.g., through a wholesaler). These rebates are recognized when intravenous chemotherapy drugs and oral prescription drugs are dispensed and are generally calculated by manufacturers within 30 days after the end of each completed quarter. The Company also receives additional rebates under its wholesaler contracts if it exceeds contractually defined annual purchase volumes. Purchase rebates are recorded as reductions to cost of services.

Property and Equipment, net

The Company accounts for property and equipment under Accounting Standard Codification Topic No. 360, Property, Plant, and Equipment(“ASC 360”). As required under ASC 360, the Company states property and equipment at cost, net of accumulated depreciation. Property and equipment is depreciated using the straight-line method over the estimated useful lives of the related assets, as described further in Note 8. Maintenance and repairs are charged to expense as incurred. Significant renewals and improvements are capitalized. At the time of retirement or other disposition of property and equipment, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in the Consolidated Statements of Operations.

When events or changes in circumstances indicate that the carrying amount of long-lived assets, including property and equipment, or other long-lived assets, may not be recoverable, an evaluation of the recoverability of currently recorded costs is performed. When an evaluation is performed, the estimated value of undiscounted future net cash flows associated with the asset groups is compared to the asset groups’ carrying value to determine if a write-down to fair value is required. If such assets are considered to be impaired, the impairment to be recognized is measured as the amount by which the carrying amount of the asset group exceeds the fair value of the assets. There wereno impairment adjustments recorded for long-lived assets during the years ended December 31, 2025 and 2024.

Accounts Payable, Accrued Expenses, and Other Current Liabilities

Accounts payable primarily consists of unpaid invoices related to routine operating expenses. Accrued expenses and other current liabilities primarily consist of accruals made for payroll expenses, overpayments from payors, and deferred capitation.

Leases

The Company accounts for its leasing arrangements in accordance with Accounting Standards Codification, Topic No. 842, Leases("ASC 842"), which requires lessees to recognize assets and liabilities for most leases. The Company evaluates whether an arrangement is or contains a lease at contract inception. A lease exists when a contract conveys to the customer the right to control the use of an identified asset for a period of time in exchange for consideration. Upon lease commencement, the date on which a lessor makes the underlying asset available to the Company for use, the Company classifies the lease as either an operating or finance lease. The Company applied certain practical expedients permitted under the transition guidance, including the package of practical expedients, which permits the Company not to reassess its prior conclusions related to lease identification, lease classification, and initial direct costs capitalization. The Company solely acts as a lessee and its leases primarily consist of operating leases for its real estate in the states in which the Company operates. The Company has other operating and financing leases for various clinical and non-clinical equipment.

Generally, upon the commencement of a lease, the Company will record a right-of-use (“ROU”) asset and lease liability. An ROU asset represents the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Lease liabilities are measured at the present value of the remaining, fixed lease payments at lease commencement. The Company uses its incremental borrowing rate, based on the information available at the later of adoption, inception, or modification in determining the present value of lease payments. ROU assets are measured at an amount equal to the initial lease liability, plus any prepaid lease payments (less any incentives received) and initial direct costs, at the lease commencement date. The Company has elected to account for lease and non-lease components as a single lease component for all underlying classes of assets. As a result, the fixed payments that would otherwise be allocable to the non-lease components are accounted for as lease payments and included in the measurement of the Company’s right-of-use asset and lease liability.

Lease arrangements with an initial term of 12 months or less are considered short-term leases and are not recorded on the balance sheet. The operating lease payments are recognized as an expense on a straight-line basis over the lease term. The lease term includes any period covered by renewal options available that the Company is reasonably certain to exercise and any options to terminate the lease that the Company is not reasonably certain to exercise.

The Company displays ROU assets, current lease liabilities, and long term lease liabilities arising from operating leases as separate line items on the consolidated balance sheet. The Company includes ROU assets, current lease liabilities, and long term lease liabilities arising from finance leases within property and equipment, net; accrued expenses and other current liabilities; and other non-current liabilities.

Goodwill

The Company accounts for goodwill under Accounting Standards Codification Topic No. 350, Intangibles -Goodwill and Other(“ASC 350”). Goodwill represents the excess of the fair value of the consideration conveyed in and acquisition over the fair value of net assets acquired.

Goodwill is not amortized but is required to be evaluated for impairment annually or sooner if impairment indicators exist. The Company performs its annual testing of impairment for goodwill in the fourth quarter of each year. When impairment indicators are identified, the Company compares the reporting unit’s fair value to its carrying amount, including goodwill. An impairment loss is recognized as the difference, if any, between the reporting unit’s carrying amount and its fair value to the extent the difference does not exceed the total amount of goodwill allocated to the reporting unit.

The Company performed a qualitative assessment for the twelve months ended December 31, 2025 and 2024 and determined it was not necessary to perform the two-step quantitative analysis. The Company determined there wasno impairment for the twelve months ended December 31, 2025 and 2024.

Intangible Assets

Under ASC 350, finite-lived intangible assets are stated at acquisition-date fair value. The Company's intangible assets are amortized using the straight-line method.

Finite-lived intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When circumstances indicate that recoverability may be impaired, the Company assesses its ability to recover the carrying value of the asset group from the expected future pre-tax cash flows (undiscounted and without interest charges) of the related operations. If these cash flows are less than the carrying value of such asset, an impairment loss is recognized for the difference between estimated fair value and carrying value. Fair value is determined based on appropriate valuation techniques.

For the years ended December 31, 2025 and 2024, the Company performed a qualitative analysis and determined that there were no indicators of impairment. Therefore, no impairment charge of its finite-lived intangible assets was recorded.

Investments in Marketable Securities

The Company's investments in marketable securities are classified as available-for-sale and are carried at fair value. The Company accounts for its investment securities available for sale using the fair value election pursuant to ASC 825, Financial Instruments ("ASC 825"), where changes in fair value are recorded in unrealized gains (losses), net on the Company's Consolidated Statements of Operations. The Company determines the appropriate classification of these investments at the time of purchase and reevaluates such designation at each balance sheet date. The Company’s marketable securities are classified as current assets if the maturity date is less than one year from the balance sheet date.

Interest income and accretion on marketable securities are included in interest income in the Consolidated Statements of Operations. Realized gains and losses on sales of securities, and other-than-temporary declines in the fair value of marketable securities, if any, are included as a component of other income (expense), net in the Consolidated Statements of Operations. The cost of securities sold is based on the First In, First Out method.

At each reporting period, the Company evaluates available-for-sale marketable securities, to the extent the fair value option is not elected, for any credit-related impairment when the fair value of the investment is less than its amortized cost. If the Company determines that the decline in fair value is below the carrying value and this decline is other-than-temporary, credit-related impairment is recognized in the Consolidated Statements of Operations in accordance with ASC 320, Debt Securities.

Debt

The Company accounts for debt net of debt issuance costs and debt discount. Debt issuance costs and debt discount are capitalized, netted against the related debt for presentation purposes, and amortized to interest expense over the terms of the related debt using the effective interest method.

The Company accounts for bifurcated, debt-classified embedded features separately as derivative liabilities pursuant to Accounting Standards Codification Topic No. 815, Derivatives and Hedging ("ASC 815"). Bifurcated, debt-classified embedded features are recorded at fair value on the Company's balance sheet with subsequent changes in fair value recorded in the Consolidated Statement of Operations each reporting period.

Public Warrants and Private Placement Warrants

Upon completion of the Business Combination, the Company assumed public and private placement warrants that were issued by DFPH in connection with its initial public offering (declared effective by the Securities and Exchange Commission on March 10, 2020) whereby holders of the public and private placement warrants are entitled to acquire common stock of the Company.

The shares of common stock underlying the public warrants are not redeemable and the Company has one single class of voting stock; therefore, the public warrants are not precluded from being considered indexed to the Company’s common stock which allows the public warrants to meet the criteria for equity classification per Accounting Standards Codification Subtopic No. 815-40 Contracts on an Entity's Own Equity ("ASC 815-40"). Warrants classified as equity are recorded at their issuance cost and are not subject to remeasurement at each subsequent balance sheet date.

The private placement warrants are not considered indexed to the Company’s stock per ASC 815-40 and are therefore recorded as liabilities, given the settlement of the private placement warrants is dependent, in part, on who holds the warrants at the time of the settlement. Warrants classified as liabilities are recorded at their estimated fair value and are revalued at each subsequent balance sheet date, with fair value changes recognized in other non-operating expense (income) in the accompanying Consolidated Statements of Operations. The Company estimates the value of these warrants using a Binomial Lattice valuation model in a risk-neutral framework.

Earnout Liability

The Company determined that Earnout Shares issuable to Legacy TOI stockholders and DFPH stockholders failed to meet equity classification criteria under ASC 815-40 and therefore, represents a liability that meets the definition of a derivative and recognized it on the balance sheet at its fair value upon the Closing Date. The right to Earnout Shares issuable to Legacy TOI stockholders and DFPH stockholders were remeasured at fair value using a Monte Carlo simulation model each period through earnings. The Earnout Shares were cancelled as of December 31, 2024 due to the performance obligation not being met. See Note 7 for further discussion.

Earnout Shares issuable to Legacy TOI employees were considered a share-based compensation award under Accounting Standards Codification Topic No. 718, Stock Based Compensation(“ASC 718”) due to the requirement that Legacy TOI employees must remain employed by the Company in order to not forfeit such unvested Earnout Shares. Such Earnout Shares were accounted for within equity over the service period. See Note 14 for further discussion.

Income Taxes

The Company accounts for income taxes under the asset and liability method under Accounting Standards Codification Topic No. 740, Income Taxes(“ASC 740”). Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest related to unrecognized tax benefits in interest expense and penalties in selling, general, and administrative expenses.

Retirement Plans

The Company provides a qualified 401(K) plan to all eligible employees which is administered through the Principal Financial Group, Inc. Employees are eligible to participate in the plan on the first day of the month subsequent to completingtwo months of service. Eligible employees may, subject to statutory limitations, contribute a portion of their salary to the plan through payroll deduction. In 2025 and 2024, the Company provided a matching contribution of 100% of the elective deferral that does not exceed 4% of compensation. Participants are always fully vested in their own contributions and the Company’s matching contributions vest immediately. The Company expensed to selling, general and administrative expenses $1,465 and $1,383 in matching contributions related to the 401(K) plan during the years ended December 31, 2025 and 2024, respectively.

Share-Based Compensation Plan

The Company accounts for share-based compensation under Accounting Standards Codification Topic No. 718, Compensation - Stock Compensation ("ASC 718"). As required under ASC 718, the Company accounts for employee and nonemployee share-based compensation as an expense in the consolidated financial statements. Equity-classified awards are measured at the grant date fair value ofthe award. Liability-classified awards are remeasured at fair value each reporting end date. For stock options, the Company estimates grant date fair value using the Black-Scholes-Merton option-pricing model. For restricted stock units (“RSU”), the fair value is based on the Company’s share price on the grant date. Liability-classified awards are settled in a variable number of the Company’s common stock on the vesting date based on a fixed monetary value. The Company accounts for forfeitures as incurred.

Excess tax benefits of awards related to stock option exercises are recognized as an income tax benefit in the Consolidated Statements of Operations and reflected in operating activities in the Consolidated Statements of Cash Flows.

Commitments and Contingencies

The Company accounts for contingent liabilities under Accounting Standards Codification Subtopic No. 450-20, Contingencies(“ASC 450-20”). As required by ASC 450-20, liabilities for loss contingencies arising from claims, assessments, litigation, fines, penalties, and other sources are recorded when it is probable that a liability has been incurred and the amount can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred.

Comprehensive Loss

Comprehensive loss includes net loss to common stockholders as well as other changes in equity that result from transactions and economic events other than those with stockholders. There was no difference between comprehensive loss and net loss to common stockholders for the periods presented.

Fair Value Measurements

The Company accounts for fair value measurements under Accounting Standards Codification Topic No. 820, Fair Value Measurements(“ASC 820”). The Company uses valuation approaches that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. The Company determines fair value based on assumptions that market participants would use in pricing an asset or liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels (see Note 7 for further discussion):

Level 1 inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

Level 2 inputs: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.

Level 3 inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date.

The Company's fair value measurement methodology for cash and cash equivalents, accounts receivable, other receivables, accounts payable and accrued expenses approximates fair value because of the short maturity and high liquidity of these instruments. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation methodologies. Level 2 investment securities include US Treasuries purchased in the secondary market that use pricing inputs other than quoted prices in active markets and fair value is determined using pricing models or other valuation methodologies such as broker price indications, which are based on quoted prices for identical or similar notes, which are Level 2 input measures. Contingent considerations are valued using a present value factor using credit rating yields which are considered to be a Level 3 fair value measurement. Fair value measurements used for the goodwill and intangible assetsare based on the discounted cash flow method within the income approach and guideline public company method to value the reporting units, which is considered to be a Level 3 fair value measurement. The unobservable inputs utilized in determining the fair value of goodwill based on the income approach primarily include estimated future cash flows, discounted at a rate that approximates the cost of capital of a market participant. Inputs used to calculate the fair value based on the market approach include the revenue and EBITDA multiples based on guidelines for similar publicly traded companies and recent transactions. Fair value measurements of derivative warrants liability are based on Binomial Lattice, which is considered to be Level 3 fair value measurement. The primary unobservable input utilized in determining the fair value of the derivative warrants is the expected volatility of the common stock. Fair value measurements of the convertible note warrant and conversion option derivative liabilities are based on the Black-Derman-Toy model implemented in the Binomial Lattice and Black-Scholes Models, which are considered to be Level 3 fair value measurements. The primary unobservable input utilized in determining the fair value of the convertible note warrant and conversion option derivative liabilities is the expected volatility of the common stock. The senior secured convertible note, which is carried at amortized cost, is considered to be a Level 2 fair value measurement due to observable inputs, such as the term matched risk-free rate and the credit spread, which is used to calculate the discount rate as of the valuation date.

Recently Issued and Adopted Accounting Standards

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvement to Income Tax Disclosures ("ASU 2023-09"). The new standard requires a public business entity (PBE) to disclose, on an annual basis, a tabular rate reconciliation using both percentages and currency amounts, broken out into specified categories with certain reconciling items further broken out by nature and jurisdiction to the extent those items exceed a specified threshold. In addition, all entities are required to disclose income taxes paid, net of refunds received disaggregated by federal, state/local, and foreign and by jurisdiction if the amount is at least 5% of total income tax payments, net of refunds received. For PBEs, the new standard is effective for annual periods beginning after December 15, 2024, with early adoption permitted. An entity may apply the amendments in this ASU prospectively by providing the revised disclosures for the year ending December 31, 2025 and continuing to provide the pre-ASU disclosures for the prior periods, or may apply the amendments retrospectively by providing the revised disclosures for all periods presented. The Company adopted ASU 2023-09 as of December 31, 2025. The adoption did not have a material impact on the Company's financial statements.

In November 2024, the FASB issued ASU 2024-03,“Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40).” ASU 2024-03 does not change the expense captions an entity presents on the face of the income statement; rather it requires disaggregation of certain expense captions into specified categories in disclosures within the footnotes to the financial statements. ASU 2024-03 requires footnote disclosure about specific expenses to disaggregate, in a tabular presentation, each relevant expense caption on the face of the income statement that includes any of the following natural expenses: (1) purchases of inventory, (2) employee compensation, (3) depreciation, (4) intangible asset amortization and (5) depreciation, depletion and amortization recognized as part of oil- and gas-production activities or other types of depletion expenses. The tabular disclosure would also include certain other expenses, when applicable. ASU 2024-03 does not change or remove existing expense disclosure requirements; however, it may affect where that information appears in the footnotes to the financial statements. ASU 2024-03 is effective for annual periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. The requirements will be applied prospectively with the option for retrospective application. Early adoption is permitted. The Company will adopt ASU 2024-03 at the beginning of fiscal year 2027. The Company is currently evaluating the disclosure requirements and its effect on the Consolidated Financial Statements.

Note 3. Credit and Concentration Risks

Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash, accounts receivable, and investment securities.

Cash accounts in a financial institution may, at times, exceed the Federal Deposit Insurance Corporation coverage of $250 per account ownership category. The Company has not experienced losses on these accounts, and management believes the Company is not exposed to significant risks on such accounts.

The Company’s accounts receivable has implicit collection risk. The Company grants credit without collateral to their patients, most of whom are local residents and are insured under third-party payor agreements. The Company believes this risk is partially mitigated by the Company’s establishment of long-term agreements and relationships with third-party payors that provide the Company with insight into historic collectability and improve the collections process.

Revenue Concentration Risk

The concentration of net revenue on a percentage basis for major payors for the years ended December 31, 2025 and 2024 are as follows:

Theconcentration of gross receivables on a percentage basis for major payors at December 31, 2025 and 2024 are as follows:

Allof the Company’s revenue is generated from customers located in the United States.

Vendor Concentration Risk

The concentration of direct costs on a percentage basis for major vendors for the years ended December 31, 2025 and 2024 are as follows:

The concentration of gross payables on a percentage basis for major vendors at December 31, 2025 and 2024 are as follows:

Note 4. Accounts Receivable

The Company’s accounts receivable consists primarily of amounts due from third-party payors and patients. See Note 2 for a summary of the Company’s policies relating to accounts receivable and allowance for credit losses.

Accounts Receivable as of December 31, 2025 and 2024 consist of the following:

There wasno allowance for credit losses recorded as of December 31, 2025 and 2024.

As of January 1, 2024, the accounts receivable balance amounted to $42,360.

During the year ended December 31, 2025 and 2024, the Company didnot have significant bad debt expense or recoveries. Credit losses were a result of accounts receivable on completed contracts that were deemed uncollectible during the period.

Note 5. Revenue

The Company recognizes revenue in accordance with ASC 606 on the basis of its satisfaction of outstanding performance obligations. The Company fulfills its performance obligations over time, either over the course of a single treatment (fee-for-service or "FFS"), a month (capitation), or a number of months (clinical research). The Company also has revenue that is satisfied at a point in time (specialty pharmacy). See Note 2 for summary of the Company’s policies and significant assumptions related to revenue recognition.

Disaggregation of Revenue

The Company categorizes revenue based on various factors such as the nature of contracts, payors, order to billing arrangements, and cash flows received by the Company, as follows:

Refer to Note 19 for Segment Reporting for disaggregation of revenue by reporting segment.

Contract Asset and Liabilities

Under ASC 606, contract assets represent rights to payment for performance contingent on something other than the passage of time and accounts receivable are rights to payment for performance without contingencies. The Company doesnot have any contract assets as of December 31, 2025 and 2024. Refer to Note 4 for accounts receivable as of December 31, 2025 and 2024.

Contract liabilities represent cash that has been received for contracts, but for which performance is still unsatisfied. Contract liabilities consist of estimated deductions and expenses related to capitation contracts. As of December 31, 2025 and 2024, contract liabilities amounted to $2,282 and $2,351, respectively. As of January 1,2024, the contract liabilities amounted to $545. Contract liabilities are included within other current liabilities and presented in Note 9 along with refund liabilities due to amounts not being material. During the years ended December 31, 2025 and 2024, the Company recognized revenue of $0 and $545, respectively, related to deferred capitation revenue received (contract liability) as of the beginning of each respective year.

Remaining Unsatisfied Performance Obligations

The accounting terms for the Company’s patient services and specialty pharmacy contracts do not extend past a year in duration. Additionally, the Company applies the ‘as invoiced’ practical expedient to its clinical research contracts.

Note 6. Inventories

The Company purchases oral, intravenous and injectable chemotherapy medications from primarily one supplier. See Note 2 for a summary of the Company’s policies relating to oral, intravenous and injectable chemotherapy inventory.

The Company’s inventories as of December 31, 2025 and 2024 were as follows:

Note 7. Marketable Securities and Fair Value Measurements

Marketable Securities

The Company accounts for its investment securities available for sale using the fair value election pursuant to ASC 825, where changes in fair value are recorded in Other, net non-operating expense (income) on the Company's Consolidated Statements of Operations. The Company’s investments in cash equivalents and marketable securities at December 31, 2025 and 2024 is as follows:

The contractual maturities of the Company's investments in cash equivalents as of December 31, 2025 and 2024 is as follows:

The Company recorded a net unrealized loss of $6 for the twelve months ended December 31, 2025.

Accrued interest receivable on cash equivalents and marketable securities was $53 and $37, respectively, at December 31, 2025 and 2024, and is included within other receivables in the Consolidated Balance Sheets.

Fair Value Measurements

The following tables present the carrying amounts of the Company’s financial instruments at December 31, 2025 and 2024:

There were no transfers between levels for the twelve months ended December 31, 2025 and 2024.

The carrying amounts of cash, accounts receivable, other receivables, accounts payable, and accrued expenses approximate fair value because of the short maturity and high liquidity of these instruments.

The Company measures its investments (including cash equivalents, marketable securities, and non-current investments) at fair value on a recurring basis and classifies those instruments within Level 2 of the fair value hierarchy. Investment securities, including U.S. Treasury Bills purchased in the secondary market and U.S. Treasury bonds, are classified within Level 2 of the fair value hierarchy because pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the reporting date, and fair value is determined using models or other valuation methodologies.

The Company measures its private derivative warrants on a recurring basis and classifies those instruments within Level 2 of the fair value hierarchy because the valuation is based on the observable input of a similar instrument. The Company measures its convertible note warrant derivative liability, optional redemption derivative liability and conversion option derivative liability on a recurring basis and classifies those instruments within level 3 of the fair value hierarchy because unobservable inputs are used to measure fair value. See Note 2 for a summary of the Company’s policies relating to fair value measurements, and Note 11 for more detail on the convertible note warrant, optional redemption, and conversion option derivative liabilities.

The following table presents information about the Company’s financial liabilities that are measured at fair value on a recurring basis at December 31, 2025:

As of December 31, 2025 and 2024, the conversion option derivative was valued using a Binomial Lattice, which is considered to be a Level 3 fair value measurement. A summary of the level 3 fair value measurements inputs used in the valuations is as follows:

Uncertainty of Fair Value Measurement from Use of Significant Unobservable Inputs

The inputs to estimate the fair value of the Company’s derivative warrant, convertible note warrant, and conversion option derivative liabilities were the market price of the Company’s common stock, their remaining expected term, the volatility of the Company’s common stock price and the risk-free interest rate over the expected term. Significant changes in any of those inputs in isolation can result in a significant change in the fair value measurement.

Generally, an increase in the market price of the Company’s shares of common stock, an increase in the volatility of the Company’s shares of common stock, and an increase in the remaining term of the derivative liabilities would each result in a directionally similar change in the estimated fair value of the Company’s derivative liabilities. Such changes would increase the associated liability while decreases in these assumptions would decrease the associated liability. An increase in the risk-free interest rate would result in a decrease in the estimated fair value measurement and thus a decrease in the associated liability. The Company has not, and does not plan to, declare dividends on its common stock and, as such, there is no change in the estimated fair value of the derivative warrant liabilities due to the dividend assumption.

Note 8. Property and Equipment, Net

The Company accounts forproperty and equipment at historical cost less accumulated depreciation. See Note 2 for a summary of the Company’s policies relating to property and equipment.

Property andequipment, net, consist of the following:

Depreciation expense for the years ended December 31, 2025 and 2024 was $3,963 and $3,192, respectively.

Note 9. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities as of December 31, 2025 and 2024 consist of the following:

Contract liabilities as of December 31, 2025 and 2024 consist of cash that has been received for contracts, but for which performance is still unsatisfied. Contract liabilities consist of estimated deductions and expenses related to capitation contracts.

The Company has agreed to indemnify members of the Board and certain officers if they are named or threatened to be named as a party to any proceeding by reason of the fact that they acted in such capacity. The Company entered into a $964 financing arrangement beginning November 2025 with a maturity date of September 2026 at 7.49% annual interest rate to pay 11 monthly principal and interest payments of approximately $91 in premiums for directors’ and officers’ (“D&O”) insurance coverage through September 2026 to protect against such losses. The principal outstanding balance was $794 and $770 as of December 31, 2025 and 2024, respectively.

Note 10. Leases

The Company leases clinics, office buildings, and certain equipment under noncancellable financing and operating lease agreements that expire at various dates through June 2033. See Note 2 for a summary of the Company’s policies relating to leases.

The initial terms of operating leases range from 1 to 10 years and certain leases provide for free rent periods, periodic rent increases, and renewal options. Monthly payments for these leases range from$0 to$41. All lease agreements generally require the Company to pay maintenance, repairs, property taxes, and insurance costs, which are generally variable amounts based on actual costs incurred during each applicable period.

The Company has determined that periods covered by options to extend the Company's leases are excluded from the lease terms as it is not reasonably certain the Company will exercise such options.

Lease Expense

The components of lease expense were as follows:

Operating and other lease costs are presented as part of selling, general, and administrative expenses. The components of finance lease costs appear in depreciation and amortization and interest expense.

Maturity of Lease Liabilities

The aggregate future lease payments for the Company's leases in years subsequent to December 31, 2025 are as follows:

Lease Term and Discount Rate

The following table provides the weighted average remaining lease terms and weighted average discount rates for the Company's leases as of:

Supplemental Cash Flow Information

The following table provides certain cash flow and supplemental noncash information related to the Company's lease liabilities for the years ended December 31, 2025 and 2024.

During the years ended December 31, 2025 and 2024 , ROU assets of$1,477 and $3,049 were obtained in exchange for lease obligations, respectively.

Lease Modifications

During the year ended December 31, 2025, the Company extended its lease terms forfour clinics in California and one clinic in Arizona. These extensions constitute lease modifications that qualify as a change of accounting for the original leases and not separate contracts. Accordingly, for the twelve months ended December 31, 2025, the Company recognized the difference of $1,570 as an increase to the operating lease liability and to the operating lease right-of-use asset, and $17 as a net increase to rent expense.

During the year ended December 31, 2024, the Company extended its lease terms forfour clinics in California. These extensions constitute lease modifications that qualify as a change of accounting for the original leases and not separate contracts. Accordingly, in the year ended December 31, 2024, the Company recognized the difference of $1,410 as an increase to the operating lease liability; $1,375, net of lease incentives, as an increase to operating lease right-of-use asset, and $85 as a net increase to rent expense.

Note 11. Debt

Senior Secured Convertible Note

On August 9, 2022, TOI entered into a Facility Agreement (the “Facility Agreement”) with certain lenders (“Lenders”) and Deerfield Partners L.P. (“Agent”), pursuant to which, TOI borrowed cash loans from the Lenders in the amount of $110,000, in exchange for which, TOI issued to each Lender a secured convertible promissory note (“Senior Secured Convertible Notes”), which is payable to such Lenders in an amount equal to the unpaid principal amount of loans held by such Lender.

The Senior Secured Convertible Notes will mature on August 9, 2027 (the “Maturity Date”) and shall bear interest at the rate of 4.00% per annum from August 9, 2022, on the outstanding principal amount, any overdue interest and any other amounts and obligations. The interest shall be paid in cash quarterly in arrears commencing on October 1, 2022. In case of any prepayment, repayment or redemption of the Senior Secured Convertible Note, the Company shall pay any accrued and unpaid interest on the principal, along with a make whole amount and an exit fee.

The Facility Agreement requires the Company to meet certain operational and reporting requirements, including, but not limited to, customary regulatory, financial reporting, and disclosure requirements. Additionally, limitations are placed on the Company's ability to merge with other companies and enter into other debt arrangements and permitted investments are limited to amounts specified in the Facility Agreement. The Facility Agreement also provides certain restrictions on dividend payments and other equity transactions and requires the Company to make prepayments under specified circumstances. Financial covenants in the Facility Agreement require the Company to maintain minimum net quarterly revenues of $100,000 during fiscal year 2025 and thereafter. Additionally, the Registration Rights Agreement requires the Company to have an effective registration statement and calls for payment should the registration statement cease to remain effective. The Company was in compliance with the covenants of the Facility Agreement as of December 31, 2025.

On February 26, 2025, the Company, the Lenders, and the Agent, entered into the Limited Consent and Amendment No. 1 to Facility Agreement (the “Consent and Amendment”), which amended the Facility Agreement, dated as of August 9, 2022.

The Consent and Amendment, among other things, provided for (i) Lenders’ consents to the waiver of certain restrictions imposed by the Facility Agreement regarding the issuance and sale of the Company’s equity and equity-linked securities, (ii) the removal of a financial covenant that required the Company to hold at least $40,000 of cash or cash equivalents in accounts that were subject to control agreements in favor of the Agent, (iii) amendment and restatement of the Company’s financial reporting covenant under the Facility Agreement in its entirety, and (iv) granting participation rights permitting the Lenders to purchase common stock and/or warrants exercisable for common stock in up totwo equity offerings that occur by no later than February 26, 2026 (“Participation Rights”). The Consent and Amendment was accounted for as a debt modification in accordance with ASC 470.

In connection with the Consent and Amendment, the Company executed the Optional Redemption feature (as described below) and made a partial prepayment of the Senior Secured Convertible Notes issued pursuant to the Facility Agreement in an aggregate principal amount of approximately $20,000 together with accrued and unpaid interest thereon. As part of the prepayment, the Lenders also waived any and all Make Whole Amounts that would otherwise be due and owing thereto under the Facility Documents in respect of the prepayment. As a result of the prepayment, the Company recognized a loss on extinguishment of debt within interest expense of $2,900 during the quarter ended March 31, 2025, which consisted of a proportionate write-off of unamortized financing costs related to the Facility Agreement.

Additionally, in connection with the Private Placement (described in Note 13. Stockholders’ Equity) certain Lenders exercised participation rights and entered into an exchange agreement pursuant to which such Lenders agreed to exchange approximately $4,100 aggregate principal amount of the Company’s Senior Secured Convertible Notes for 37,232.83 shares of common-equivalent Preferred Stock (convertible into 3,723,283 shares of Common Stock) and warrants to purchase 1,861,642 shares of Common Stock at the same prices being paid by the investors in the Private Placement. The fair value of the common-equivalent Preferred Stock and warrants issued was $4,100. The exchange was accounted for as a partial debt extinguishment under ASC 470. As a result, the Company recognized a loss on extinguishment of debt within interest expense of $600 during the year ended December 31, 2025, which consisted of a proportionate write-off of unamortized financing costs related to the Facility Agreement.

The Company was in compliance with the amended covenants of the Facility Agreement as of December 31, 2025.

Conversion Options

The Senior Secured Convertible Notes contain several embedded conversion options (the “Conversion Options”) that grant the holders of the Senior Secured Convertible Notes the ability to convert the Senior Secured Convertible Notes at any time on or after date of issuance of the note. The Conversion Options are convertible into shares of the Company’s common stock (such converted shares, “Conversion Shares”) and, in certain circumstances, a combination of cash and shares of the Company’s common stock, or a combination of cash, other assets and securities or other property of any Company successor entity. The Conversion Shares or settlement amounts shall be computed on the basis of predefined formulae, with a set conversion price of $8.567 as one of the inputs and a conversion cap of 14,663,019 shares. The if-converted value did not exceed the principal amount as of December 31, 2025. No Conversion Shares were issued as of December 31, 2025.

The Company evaluated the Conversion Options of the Senior Secured Convertible Notes under ASC 815 and concluded that they require bifurcation from the host contract as a separate unit of account. The Conversion Options do not meet the criteria to be classified in stockholders’ equity and hence, are accounted for as a derivative liability remeasured at fair value at each balance sheet date with changes in fair value reported in earnings.

The Conversion Options contain certain limits on exercise if, after giving effect to the exercise, the Lender would beneficially own a number of shares of common stock of the Company in excess of those permissible under the terms of the Senior Secured Convertible Notes. The number of shares to be issued against these notes and conversion price are each subject to adjustments provided under the terms of Senior Secured Convertible Notes.

The holder shall receive dividends on the Senior Secured Convertible Notes and distributions of any kind made to the holders of common stock, other than dividends of, or distributions in, shares, to the same extent as if the holder had converted the Senior Secured Convertible Notes into such shares and had held such shares on the record date for such dividends and distributions any limitations on conversion options.

Optional Redemption

The Facility Agreement also provides the Company the right to redeem the outstanding principal amount of each note (“Optional Redemption”) for the principal amount, plus undiscounted interest. The Company shall not affect any Optional Redemption under this Senior Secured Convertible Notes unless along with this, the Company effects an optional redemption under all other notes in accordance with the terms thereof, on a pro rata basis, based upon the respective applicable original principal amount of each of the notes outstanding as of the date the notice for Optional Redemption is delivered to the holders.

The Company evaluated the Optional Redemption feature of the Senior Secured Convertible Notes under ASC 815 and concluded that it requires bifurcation from the host contract as a separate unit of account. The Optional Redemption feature does not meet the criteria to be classified in stockholders’ equity and hence, is accounted for as a derivative liability remeasured at fair value at each balance sheet date with changes in fair value reported in earnings. The fair value of the Optional Redemption feature is de minimis.

If the principal redemption amount specified in an Optional Redemption notice is less than the entire principal amount then outstanding, the principal amount specified in each conversion notice shall be applied (i) first, to reduce, on a dollar-for-dollar basis, the principal amount of the note in excess of the principal redemption amount until such excess principal amount is reduced to zero and (ii) to reduce, on a dollar-for-dollar basis, the principal redemption amount until all of such principal redemption amount shall have been converted.

Convertible Note Warrants

The Facility Agreement also provides for the issuance of warrants (the “Convertible Note Warrants”) on each date any principal amount of any Senior Secured Convertible Note is paid, repaid, redeemed, or prepaid at any time prior to the Maturity Date. Convertible Note Warrants are exercisable from their original issue date to August 9, 2027, for purchase of an aggregate amount of Conversion Shares into which such principal amount of Senior Secured Convertible Note was convertible into, immediately prior to such payment, at an exercise price of $8.567. The holder of Convertible Note Warrants may pay the exercise price in cash or exercise the warrant on cashless basis or through a reduction of an amount of principal outstanding under any Senior Secured Convertible Note held by such holder. In the event that the Convertible Note Warrant has not been exercised in full as of the last business day during its term, the holder shall be deemed to have exercised the purchase rights represented by the Convertible Note Warrant in full as a cashless exercise, in which event the Company shall issue number of shares to the holder computed on the basis of a predefined formula.

The Company evaluated the Convertible Note Warrants of the Senior Secured Convertible Notes under ASC 815 and concluded that they require bifurcation from the host contract as a separate unit of account. The Convertible Note Warrants do not meet the criteria to be classified in stockholders’ equity and hence, are accounted for as a derivative liability remeasured at fair value at each balance sheet date with changes in fair value reported in earnings.

The Convertible Note Warrant holder shall be entitled to receive any dividend or distribution made by the Company to the holders of common stock to the same extent as if the holder had exercised the Convertible Note Warrants in full in a cash exercise.

The number of shares to be issued against these warrants and exercise price are each subject to adjustments provided under the terms of Convertible Note Warrants. The Convertible Note Warrants contain certain limits on exercise if, after giving effect to the exercise, the Lender would beneficially own a number of shares of common stock of the Company in excess of those permissible under the terms of the Convertible Note Warrants. Further, the Convertible Note Warrants can be fully or partially settled in cash in certain cases in accordance with the terms of issuance such as when shares issuable upon exercise of the warrants exceed a predefined number, upon occurrence of predefined event of default and upon occurrence of predefined events that will bring a fundamental change in the Company such as merger, consolidation, business combination, recapitalization, reorganization, reclassification or other similar event.

As of December 31, 2025 and 2024, there areno Convertible Note Warrants outstanding.

Allocation of Proceeds

The Company has allocated total issuance proceeds of $110,000 among the Senior Secured Convertible Note and Convertible Note Warrants based on fair value. Upon issuance of the Convertible Note Warrants, the Company recorded Convertible Note Warrants, Optional Redemption, and Conversion Options of $0, $0 and $28,160, which were recorded as a debt discount to the Senior Secured Convertible Note of $110,000. The Company will amortize the debt discount over a period of 5 years (of which 1.61 years remain).

The total issuance costs of $4,924 was allocated among the Senior Secured Convertible Note, Convertible Note Warrants, Optional Redemption, and Conversion Options, by allocating costs of $0, $0, and $1,261 to the Convertible Note Warrants, Optional Redemption, and Conversion Options with the residual cost of $3,663 being allocated to the Senior Secured Convertible Note (in addition to the debt discount). The Company immediately expensed issuance costs allocated to Warrants, Optional Redemption, and Conversion Options at inception and will amortize the costs allocated to the Senior Secured Convertible Note over a period of 5 years (of which 1.61 years remain).

Amounts Outstanding and Recognized during the Periods Presented

The Senior Secured Convertible Note as of December 31, 2025 consists of the following:

As of December 31, 2025 and 2024, the estimated fair value (Level 2) of the Senior Secured Convertible Note was$76,290 and$92,359, respectively.

The amortization of the debt issuance costs and debt discount was charged to interest expense for all periods presented. For the years ended December 31, 2025 and 2024, the effective yield was 10.64% and 13.38%, respectively. The amount of debt issuance costs and debt discount included in interest expense for the years ended December 31, 2025 and 2024 was $8,380 and $6,305, respectively. The Company had interest expense of $3,634 and $4,473 on the Facility Agreement term loan for the years ended December 31, 2025 and 2024, respectively. The Company had$878 and $1,136 of accrued interest as of December 31, 2025 and 2024, respectively.

On August 9, 2022, the Company also entered into the Guarantee and Security Agreement (“Guarantee Agreement”) with the Agent for the purpose of providing a guarantee of all the obligations under the Facility Agreement (refer to Note 15. Commitments and Contingencies for detail).

Additionally, the lenders' Agent holds shares of common and preferred stock within the Company as of December 31, 2025 and 2024.

Debt Maturities

The following table summarizes the stated debt maturity related to the Senior Secured Convertible Note as of December 31, 2025:

Note 12. Income Taxes

The components of the provision (benefit) for income taxes consists of:

As further described in Note 2, Summary of Significant Accounting Policies, the Company has elected to prospectively adopt the guidance in ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Taxes Disclosures, or ASU 2023-09. The following table is a reconciliation of the U.S. federal statutory rate of 21% to the Company's effective rate for the year ended December 31, 2025 in accordance with the guidance in ASU No. 2023-09:

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2025 and 2024 are presented below.

In 2025, although the Company was in a taxable loss position and recorded no income taxes, the Company made state income tax payments for certain states with minimum tax requirements. The amount is immaterial.

The valuation allowance for deferred tax assets as of December 31, 2025 and 2024, was $75,952 and $63,595, respectively. The net change in the total valuation allowance was an increase of $12,357 in 2025 and an increase of $9,616 in 2024.

The valuation allowance at December 31, 2025 was primarily related to net operating loss carryforwards of TOI, Inc., TOI CA, TOI FL, TOI OR, and TOI TX, that, in the judgment of management, are not more likely than not to be realized. Similar to 2024, TOI Inc., TOI CA, TOIFL, TOI OR, and TOI TX will continue to file a consolidated 2025 federal return and state income tax return. Accordingly, net operating losses of TOI CA, TOI FL, TOI OR, and TOI TX can offset taxable income of TOI Parent for federal and state tax purposes. Deferred tax assets and deferred tax liabilities have been separately determined for all groups, as has the valuation allowance assessment for each. The table above reflects the combined deferred tax assets, deferred tax liabilities, and valuation allowance for TOI Inc., TOI CA, TOI FL, TOI OR, and TOI TX. Of the $75,952 total valuation allowance, $54,789 is attributable to the Federal Group, $4,461 is attributable to TOI Parent, $16,604 is attributable to TOI CA, $93 is attributable to TOI FL, and $5 to TOI OR.

In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities (including the effect of available carry back and carryforward periods), projected future taxable income, and tax-planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that the Company will not realize the benefits of these deductible differences, net of the existing valuation allowances at December 31, 2025.

At December 31, 2025, the Company has net operating loss carryforwards for Federal income tax purposes of $227,511, with $199,935 attributable to the Practice and $27,576 attributable to TOI Parent, which are available to offset future Federal taxable income of the Practiceand Parent indefinitely. The Company has net operating loss carryforwards for state income tax purposes of $220,728, of which $185,250 is attributable to the Practice and will begin to expire after 2041, and $35,479 is attributable to Parent and will begin to expire after 2042.

Pursuant to Section 382 of the Internal Revenue Code of 1986, as amended, or the Code, and corresponding provisions of state law, if a corporation undergoes an “ownership change” (very generally defined as a greater than 50% change, by value, in the corporation’s equity ownership by certain stockholders or groups of stockholders over a rolling three-year period), the corporation’s ability to use its pre-ownership change NOLs to offset its post-ownership change income may be limited. In 2022 and 2023, we completed an ownership change analysis pursuant to IRC Section 382 of the Code for the period from September 10, 2018 through taxable year ended December 31, 2021 and from January 1, 2022 through taxable year ended December 31, 2023 in which we determined that the Company did not experience an ownership change. There were no ownership changes filed with the Securities and Exchange Commission during 2024 and 2025 and the Company does not believe there were any ownership changes that would trigger any limitations imposed by Sections 382 or 383 through December 31, 2025. The Company will continue monitoring any future changes in stock ownership. The Company is currently operating in a loss position and has a full valuation allowance. We do not anticipate utilizing the tax attributes in the next year.

A summary of the changes in the amount of unrecognized tax benefits (excluding interest and penalties) for 2025 and 2024 is as follows:

The Company does not anticipate a significant change in the amount of its unrecognized tax within the next 12 months. The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense. Due to the Company’s NOL position, no interest or penalties have been recognized with respect to unrecognized tax benefits, as such amounts are considered immaterial. The Company includes unrecognized tax benefits within other non-current liabilities on its consolidated balance sheet.

The Company is subject to taxation in the U.S., California, Arizona, Florida, Oregon, and Texas. As of December 31, 2025, the statute of limitations remains open for tax year 2021 through the current year.

Note 13. Stockholders' Equity

Common Stock

As of December 31, 2025 there were 100,596,918 shares issued and 98,863,144 shares outstanding of common stock. As of December 31, 2024, there were 77,470,886 shares issued and 75,737,112 shares outstanding of common stock.

Voting shares

The holders of the Company’s common stock are entitled toone vote for each share of common stock held at all meetings of stockholders (and written actions in lieu of meetings), and there is no cumulative voting.

Common stockholders are entitled to receive dividends whenever funds are legally available and when declared by the board of directors. No dividends have been declared as of December 31, 2025.

Preferred Stock

Upon the Closing Date of the Business Combination, pursuant to the terms of the Amended and Restated Certificate of Incorporation, the Company authorized 10,000,000 shares of Series A Common Equivalent Preferred Stock (“preferred stock”) with a par value and liquidation preference of $0.0001 per share. The Company’s board of directors has the authority, without further action by the stockholders to issue such shares of preferred stock in one or more series, to establish, from time to time the number of shares to be included in each such series, and to fix the dividend, voting, and other rights, preferences, and privileges of the shares. As of December 31, 2025 and 2024, there were 193,507 and 165,045 shares of preferred stock outstanding, respectively.

Conversion

Each share of preferred stock is convertible, at any time on the part of the holder except with respect to the Beneficial Ownership Limitation (defined below), into 100 shares of common stock.

Blocker/Beneficial Ownership Limitation

The preferred stock is subject to a beneficial ownership limitation such that the preferred stock may not, at any time, be convertible into more than 4.9% of the total number of shares of common stock outstanding (“Beneficial Ownership Limitation”).

Voting

The holders of preferred stock do not have voting rights in the Company.

The holders of preferred stock are entitled to receive dividends whenever funds are legally available and when declared by the board of directors on an as-converted basis. No dividends have been declared as of December 31, 2025.

Assumed Public Warrants and Private Placement Warrants from the Business Combination

As a result of the Business Combination, holders of the public warrants and private placement warrants are entitled to acquire common stock of the Company. The warrants became exercisable 30 days from the completion of the Business Combination, on December 12, 2021, and will expire five years after the completion of the Business Combination or earlier upon redemption or liquidation. As of December 31, 2025, there are 5,749,986 public warrants outstanding and 2,187,283 private placement warrants from the Business Combination outstanding.

Each warrant entitles the holder to purchaseone share of common stock for $11.50 per share. Private warrants held by the initial purchaser or certain permitted transferees may be exercised on a cashless basis.

If the reported last sale price of the common stock equals or exceeds $18.00 per share for any 20 trading days within a 30-trading day period ending three business days before the Company sends the notice of redemption to the warrant holders, the Company may redeem all the public warrants at a price of $0.01 per warrant upon not less than 30 days’ prior written notice.

If the Company calls the public warrants for redemption, management will have the option to require all holders that wish to exercise the public warrants to do so on a cashless basis. The Company will not be required to net cash settle the warrants.

The private warrants are exercisable on a cashless basis and are non-redeemable so long as they are held by the initial purchasers or their permitted transferees. If the private warrants are held by someone other than the initial purchasers of their permitted transferees, the private warrants will be redeemable by the Company and exercisable by such holders on the same basis as the public warrants.

Private Placement Offering and Exchange Agreement

On March 24, 2025, the Company entered into a securities purchase agreement (the “Securities Purchase Agreement”) with accredited investors for a private placement that resulted in gross proceeds of approximately $16,500 before deducting placement agent fees and offering expenses (the “PIPE”). Pursuant to the terms of the Securities Purchase Agreement, the Company issued to purchasers in the PIPE units consisting oftwo shares of common stock (or pre-funded warrants in lieu thereof) and common warrants to purchaseone share of common stock (or pre-funded warrants) of the Company at a price of $2.2084 per unit (or $2.2082 in the case of units consisting of prefunded warrants). As a result of the PIPE the Company issued an aggregate of: (i)12,006,510 shares of the Company’s common stock, par value $0.0001 per share (the “Common Stock”), (ii) pre-funded warrants (the “pre-funded Warrants”) to purchase up to an aggregate of 2,886,614 shares of common stock and (iii) accompanying common warrants (the “Common Warrants,”) to purchase up to an aggregate of 7,446,562 shares of common stock (collectively, the “PIPE”). In connection with the PIPE, certain Lenders under the Company’s Facility Agreement exercised their Participation Rights and entered into an exchange agreement pursuant to which such Lenders agreed to exchange approximately $4,100 aggregate principal amount of the Company’s senior secured convertible notes for 37,232.83 shares of common-equivalent preferred stock (convertible into 3,723,283 shares of common stock) and Common Warrants to purchase 1,861,642 shares of common stock. The exercise price and terms of these Common Warrants mirror the terms of the Common Warrants offered to investors in the PIPE.

The pre-funded Warrants have an exercise price of $0.0001 per share, and the Common Warrants have an exercise price of $1.1980 per share. The pre-funded Warrants and Common Warrants are subject to customary anti-dilution adjustments following certain events. The pre-funded Warrants and Common Warrants are exercisable at any time by the holder on a cash or cashless basis until the respective warrants are registered, provided that the holder may not exercise the warrants if the holder would own more than 4.9% of the Company immediately following the exercise. The warrants are equity classified in accordance with ASC 815-40.

As of December 31, 2025, all of the Exchange Warrants (Common Warrants) related to the lender and pre-funded Warrants issued were still outstanding. As of December 31, 2025, there were 8,216,918 Common Warrants outstanding.

At-The-Market Share Issuances

During the twelve months ended December 31, 2025, the Company sold approximately 2.8 million shares of its Common Stock through its sales agent, B.Riley Securities. The Company generated approximately $9.6 million in aggregate gross proceeds from sales under the “at-the-market” offering program and paid fees to the sales agent of approximately $384 thousand.

During the twelve months ended December 31, 2025, the Company sold approximately 1.4 million shares of its Common Stock, through its sales agent, BTIG. The Company generated approximately $4.8 million in aggregate gross proceeds from sales under the “at-the-market” offering program and paid fees to the sales agent of approximately $192 thousand.

Note 14. Share-Based Compensation

Non-Qualified Stock Option Plan

On January 2, 2019, the Company issued and adopted the 2019 Non-Qualified Stock Option Plan (the “2019 Plan”) to incentivize directors, consultants, advisors, and other key employees of the Company and its subsidiaries to continue their association by providing opportunities to participate in the ownership and further growth of the Company. The 2019 Plan provides for the grant of options (the “Stock Options”) to acquire shares of common stock of the Company. In conjunction with the Business Combination, the Company amended and fully restated the 2019 Plan through the establishment of the 2021 Incentive Plan (“2021 Plan”).

Stock Options are exercised from the pool of shares designated by the appropriate Committee of the Board of Directors. The grant-date fair value of each option award is estimated on the date of grant using the Black-Scholes-Merton option-pricing model. The grant date fair value of the service vesting and the performance vesting options is recognized as an expense over the requisite service period or vesting period and upon the achievement of the performance condition deemed probable of being achieved, respectively. The exercise price of each Stock Option shall be determined by the Committee and may not be less than the fair market value of the common stock on the date of grant. Stock Options have 10-year terms, after which they expire and are no longer exercisable.

The total number of common shares for which Stock Options may be granted under the 2019 Plan shall not exceed 15,640,000.

Stock Options become vested upon fulfillment of either service vesting conditions, performance vesting conditions, or both, as determined by the award agreement entered into by the Company and optionee. The service vesting requirement states that: (i)25% of the service vesting options shall vest on the first anniversary of the grant date and (ii) the remaining 75% shall vest on an equal monthly-basis, so long as the optionee has remained continuously employed by the Company from the date of the award through the fourth anniversary of the grant date. The performance vesting requirement states that Stock Options shall vest upon sale of the Company only if the optionee has been continuously employed by the Company or its subsidiaries from the grant date through the date of such sale of the Company. For the awards vesting based on service conditions only and that have a graded vesting schedule, the Company recognizes compensation expense for vested awards in earnings, net of actual forfeitures in the period they occur, on a straight-line basis over the requisite service period.

As of December 31, 2025, the total number of shares of common stock remaining available for future awards (e.g., non-qualified stock options, incentive stock options, restricted stock units, restricted stock awards) under the 2021 Plan is 11,097,511. There wereno Stock Options granted for the twelve months ended December 31, 2025.

The weighted average assumptions used in the Black-Scholes-Merton option-pricing model for the stock options granted during the year ended December 31, 2024 are provided in the following table:

The Company used the simplified method to calculate the expected term of stock option grants because sufficient historical exercise data was not available to provide a reasonable basis for the expected term. Under the simplified method, the expected term is estimated to be the mid-point between the vesting date and the contractual term of the option.

Stock option activity during the years ended December 31, 2025 and 2024 is as follows:

Total share-based compensation expense related to stock options during the years ended December 31, 2025 and 2024 was $397 and $6,682, respectively. The weighted average fair market value of the stock options granted in 2024 was $0.59. The total intrinsic value of options exercised during 2025 and 2024, was$5,973 and $89, respectively.

At December 31, 2025, there was $346 of total unrecognized compensation cost related to unvested service Stock Options granted under the 2021 Plan that are expected to vest. That cost is expected to be recognized over a weighted average period of 1.98 years as of December 31, 2025. During the year ended December 31, 2025, the Company received $2,767 in cash and $5,973 in tax benefit from the stock options exercised. The total fair value of common shares vested during the years ended December 31, 2025 and 2024 was $1,756 and $430, respectively.

Restricted Stock Units (“RSUs”)

The Company had 3,436,019 and 1,509,737 RSUs outstanding as of December 31, 2025 and 2024, respectively. The RSUs are service vesting and are valued based on the fair value of the Company’s common stock at the date of grant. The weighted-average grant date fair values of the RSUs granted during the year ended December 31, 2025 and 2024 were determined to be $1.49 and $0.50, respectively, based on the fair value of the Company’s common shares at the grant date.

A summary of the activity for the RSUs for the years ended December 31, 2025 and 2024, respectively, are shown in the following tables:

The total share-based compensation expense related to RSUs during theyear ended December 31, 2025 was $2,959. The total share-based compensation expense related to RSUs during the year ended December 31, 2024 was$4,161.

As of December 31, 2025, there was $3,447 of unrecognized compensation expense related to the RSUs that are expected to vest. That cost is expected to be recognized over a weighted average period of 2.74 years as of December 31, 2025.

RSUs granted to Medical Employees and Nonemployees

In 2022, the Company entered into arrangements with certain medical directors and supervisors of advanced practice providers employed by or engaged as independent contractors of TOI to issue RSUs of the Company (“Medical RSUs”). Vesting on each annual Medical RSU award is dependent on the participant performing a specified minimum number of service hours during the calendar year (“one-Year Term”) and further contingent upon the participant’s continued service to, or employment by, the Company through the grant date. The Company’s regular grant date for these Medical RSU awards is in the first quarter of the calendar year following theone-year Term. During the twelve months ended December 31, 2025 and 2024,997,806 and 387,797 Medical RSU awards were granted, respectively.

The number of Medical RSUs granted to each such participant is determined by the fair market value of the Company's stock price at the grant date and vest immediately. There wereno unvested equity-classified Medical RSU awards outstanding as of December 31, 2025 and 2024.

A summary of the activity for the equity-classified Medical RSUs for the year ended December 31, 2025 and 2024 is shown in the following table:

Total compensation costs for Medical RSUs were$1,137 and $237 for the years ended December 31, 2025 and 2024, respectively. As of December 31, 2025, all Medical RSUs have vested.

Earnout Shares granted to Employees

In connection with the Business Combination in 2019, the Company issued Employee Earnout Shares. Employee Earnout Shares vest upon the Company's common stock achieving the price per share as provided for in the agreement, so long as the optionee has remained continuously employed by the Company at that date and may be subject to other vesting requirements. Earnout shares were forfeited in November 2024 due to failure to meet earnout targets of TOI's stock price.

A summary of the activity for the Employees Earnout Shares for the years ended December 31, 2025 and 2024 is shown in the following tables:

The total share-based compensation expense related to the Employees Earnout Shares during the year ended December 31, 2024 was $72.

As of December 31, 2025, there wasno unrecognized compensation expense related to the Employees Earnout Shares, that are expected to vest.

Employee Stock Purchase Plan (ESPP)

In connection with the Business Combination, the Company adopted the 2021 Employee Stock Purchase Plan ("2021 ESPP”). The 2021 ESPP has reserved 3,591,088 shares of the Company’s common stock for issuance to eligible employees, who are entitled to purchase shares of common stock equal to 85% of the lower of the closing price on the purchase date or the six month closing price average during the contribution period through accumulated payroll deductions. During the twelve months ended December 31, 2025, the Company issued 59,688 shares of common stock under the ESPP for $151 in proceeds and recognized $58 in share-based compensation expense. During the twelve months ended December 31, 2024, the Company issuedno shares of common stock under the ESPP.

Note 15. Commitments and Contingencies

The Company evaluates contingencies based upon available evidence. In addition, allowances for losses are provided each year for disputed items which have continuing significance. The Company believes that allowances for losses have been provided to the extent necessary, and that its assessment of contingencies is reasonable. Due to the inherent uncertainties and subjectivity involved in accounting for contingencies, there is at least a reasonable possibility that recorded estimates will change by a material amount in the near term. To the extent that the resolution of contingencies results in amounts which vary from management’s estimates, future operating results will be charged or credited. The principal commitments and contingencies are described below.

Legal Matters

The Company is subject to certain outside claims and litigation arising in the ordinary course of business. In the opinion of Management, the outcome of such matters will not have a material effect on the Company’s consolidated financial statements. Loss contingencies entail uncertainty and a possibility of loss to an entity. If the loss is probable and the amount of loss can be reasonably estimated, the loss should be accrued according to Accounting Standards Codification No. 450-20, Disclosure of Certain Loss Contingencies.

The Company’s Articles of Incorporation and bylaws require it, among other things, to indemnify the director or officer against specified expenses and liabilities, such as attorneys’ fees, judgments, fines, and settlements, paid by the individual in connection with any action, suit, or proceeding arising out of the individual’s status or service as its director or officer, other than liabilities arising from willful misconduct or conduct that is knowingly fraudulent or deliberately dishonest, and to advance expenses incurred by the individual in connection with any proceeding against the individual with respect to which the individual may be entitled to indemnification by the Company. The Company also indemnifies its lessor in connection with its facility lease for certain claims arising from the use of the facilities. These indemnities do not provide for any limitation of the maximum potential future payments it could be obligated to make. Historically, the Company has not incurred any payments for these obligations and, therefore, no liabilities have been recorded for these indemnities in the accompanying consolidated balance sheets.

The Health Insurance Portability and Accountability Act

The Health Insurance Portability and Accountability Act (“HIPAA”) assures health insurance portability, reduces healthcare fraud and abuse, guarantees security and privacy of health information, and enforces standards for health information. Organizations are required to be in compliance with HIPAA provisions. The Health Information Technology for Economic and Clinical Health Act (“HITECH”) imposes notification requirements in the event of certain security breaches relating to protected health information. Organizations are subject to significant fines and penalties if found not to be compliant with the provisions outlined in the regulations. The Company believes it is in compliance with these laws.

Regulatory Matters

Laws and regulations governing the Medicare program and healthcare generally, are complex and subject to interpretation. The Company believes that it is in compliance with all applicable laws and regulations and is not aware of any pending or threatened investigations involving allegations of potential wrongdoing. While no regulatory inquiries have been made, compliance with such laws and regulations can be subject to future government review and interpretation as well as significant regulatory action including fines, penalties, and exclusion from the Medicare and Medi-Cal programs.

Many of the Company’s payor and provider contracts are complex in nature and may be subject to differing interpretations regarding amounts due for the provision of medical services. Such differing interpretations may not come to light until a substantial period of time has passed following contract implementation. Liabilities for claims disputes are recorded when the loss is probable and can be estimated. Any adjustments to reserves are reflected in current operations. The Company does not have any reserves for regulatory matters as of December 31, 2025 and 2024.

Liability Insurance

The Company believes that its insurance coverage is appropriate based upon the Company’s claims experience and the nature and risks of the Company’s business. In addition to the known incidents that have resulted in the assertion of claims, the Company cannot be certain that its insurance coverage will be adequate to cover liabilities, arising out of claims asserted against the Company or the Company’s affiliated professional organizations, in the future where the outcomes of such claims are unfavorable.

The Company believes that the ultimate resolution of all pending claims, including liabilities in excess of the Company’s insurance coverage, will not have a material adverse effect on the Company’s financial position, results of operations or cash flows; however, there can be no assurance that future claims will not have such a material adverse effect on the Company’s business. Contracted physicians are required to obtain their own insurance coverage.

Guarantees

The Company, along with certain of the Company's subsidiaries from time to time party to the Facility Agreement (“Guarantors”), has pledged a first priority perfected lien on substantially all of their respective personal and real property, as collateral security for the payment of outstanding obligations, under the Facility Agreement.

Note 16. Variable Interest Entities

The Company prepares its consolidated financial statements in accordance with Accounting Standards Codification Topic No. 810, Consolidations(“ASC 810”), which provides for the consolidation of VIEs of which an entity is the primary beneficiary.

Pursuant to the MSAs established with the TOI PCs, TOI Management is entitled to receive a management fee, which represents a variable interest in and the right to receive the benefits of the TOI PCs. Through the terms of the MSAs, TOI Management receives the right to direct the most significant activities of the TOI PCs. Therefore, the TOI PCs are variable interest entities and TOI Management is the primary beneficiary that consolidates the TOI PCs, and their subsidiaries.

The consolidated financial statements include the accounts of TOI and its subsidiaries and VIEs. All inter-company profits, transactions, and balances have been eliminated upon consolidation.

Single physician holders, who are officers of the Company, retain equity ownership in TOI CA, TOI FL, TOI TX, and TOI OR, which represents nominal noncontrolling interests. However, the noncontrolling interests do not participate in the profit or loss of TOI CA, TOI FL, TOI TX, and TOI OR.

Note 17. Goodwill and Intangible Assets

The Company accounts for goodwill at acquisition-date fair value, net of impairments recognized and other intangible assets at acquisition-date fair value less accumulated amortization. See Note 2 for a summary of the Company’s policies relating to goodwill and intangible assets, as well as a discussion of the goodwill impairment charges recorded for the years ended December 31, 2025 and 2024.

Intangible Assets

As of December 31, 2025, the Company’s intangible assets, net consists of the following:

As of December 31, 2024, the Company’s intangible assets, net consists of the following:

The estimated aggregate amortization expense for each of the five succeeding fiscal years as of December 31, 2025 is as follows:

The aggregate amortization expense during the year ended December 31, 2025 and 2024 were $2,981 and $3,094, respectively.

Goodwill

The Company evaluates goodwill at the reporting unit level, which, for the Company, is at the level of the reportable segments of patient services, specialty pharmacy, and clinical trials & other. The goodwill allocated to each of the reporting units as of December 31, 2025 and December 31, 2024 is as follows:

The accumulated goodwill impairment for patient services was $26,179 as of December 31, 2025 and December 31, 2024 and January 1, 2024. The accumulated goodwill impairment for clinical trials & other was $632 as of December 31, 2025 and 2024. The accumulated goodwill impairment for clinical trials and other as of January 1, 2024, was $632. There wasno accumulated goodwill impairment for specialty pharmacy as of December 31, 2025, December 31, 2024, and January 1, 2024.

Note 18. Net Loss Per Share

The following table sets forth the computation of the Company's basic and diluted net loss per share to common stockholders for the years ended December 31, 2025 and 2024.

The following potentially dilutive outstanding securities were excluded from the computation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:

Note 19. Segment Information

The Company operates its business and reports its results through three operating and reportable segments: specialty pharmacy, patient services, and clinical trials & other in accordance with ASC 280. See Note 2 for a summary of the Company’s policy on segment information.

Summarized financial information for the Company’s segments is shown in the following tables:

The Company’s chief operating decision maker (CODM) is the Chief Executive Officer. The CODM uses segment operating income to allocate resources (including employees, property, and financial or capital resources) for each segment predominantly in the annual budget and forecasting process. The CODM considers budget-to-actual variances on a monthly basis when making decisions about allocating capital and personnel to the segments. The CODM also uses segment operating income for evaluating drug pricing to assess each segment’s performance by comparing the results and return on assets of each segment with one another and in the compensation of specific employees.

(A) Direct costs - patient services primarily includes chemotherapy drug costs, clinician salaries and benefits, and medical supplies. Clinicians include oncologists, advanced practice providers such as physician assistants and nurse practitioners, and registered nurses employed by the TOI PCs. These costs are regularly provided to the CODM to evaluate IV drug costs and clinician performance.

(B) Direct costs - specialty pharmacy primarily includes the cost of oral medications dispensed in the TOI PCs’ clinic locations. The CODM regularly reviews these costs evaluate drug margins, compression, and to evaluate suppliers.

(C) Direct costs - clinical trials & other primarily includes costs related to clinical trial contracts and medical supplies.

Note 20. Related Party Transactions

Related party transactions include payments for consulting services provided by the Company, clinical trials, and board fees. Related party payments for the years ended December 31, 2025 and 2024 were as follows:

There areno outstanding related party balances at December 31, 2025 and 2024, other than the debt balance (See Note 11).