The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The information included in this Quarterly Report on Form 10-Q should be read in conjunction with our audited consolidated financial statements and the accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Form 10-K”). Our accounting policies are described in the “Notes to Consolidated Financial Statements” in our 2020 Form 10-K and updated, as necessary, in this report. The year-end condensed consolidated balance sheet data presented for comparative purposes was derived from our audited financial statements but does not include all disclosures required by U.S. GAAP.

These condensed consolidated financial statements include the financial statements of Solus Medical Ltd. (“Solus”), a wholly owned subsidiary of the Company based in the United Kingdom, HGE, a wholly owned subsidiary of the Company located in the United States, and Vapotherm Deutschland GmbH, a new wholly owned subsidiary of the Company located in Germany. All intercompany accounts and transactions have been eliminated upon consolidation.

Operating segments are defined as components of an enterprise for which separate discrete financial information is available and evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company globally manages the business within one reporting segment, Vapotherm, Inc. and three reporting units, Vapotherm, Solus and HGE. Segment information is consistent with how management reviews the business, makes investing and resource allocation decisions and assesses operating performance.

The majority of the Company’s long-term assets are located in the United States. Long-term assets located outside the United States totaled $0.2 million as of each of March 31, 2021 and December 31, 2020.

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires the Company to make judgments, assumptions, and estimates that affect the reported amounts of assets, liabilities, revenue and expenses, and the related disclosure of contingent assets and liabilities. The Company evaluates its estimates on an ongoing basis. The Company bases its estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Significant estimates relied upon in preparing these condensed consolidated financial statements include calculation of stock-based compensation, valuation of warrants, fair values of acquired assets and liabilities, including goodwill and intangibles assets, realizability of inventories, allowance for bad debts, accrued expenses, including the fair value of contingent consideration and estimated incurred but not reported insurance obligations, and the valuation allowances against deferred income tax assets. Actual results may differ from these estimates.

The accompanying condensed consolidated balance sheet as of March 31, 2021, and the condensed consolidated statements of comprehensive loss, stockholders’ equity and of cash flows for the three months ended March 31, 2021 and 2020 are unaudited. The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair statement of the Company’s financial position as of March 31, 2021 and the results of its operations and its cash flows for the three months ended March 31, 2021 and 2020. The financial data and other information disclosed in these notes related to the three months ended March 31, 2021 and 2020 are also unaudited. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the operating results for the full year or for any other subsequent interim period.

Certain amounts in 2020 have been reclassified to conform to the presentation in 2021. None of the reclassifications had any impact to the Company’s results of operations.

As of March 31, 2021, the Company’s financial instruments were comprised of cash and cash equivalents, restricted cash, accounts receivable, accounts payable and debt, the carrying amounts of which approximated fair value due to their short-term nature or market interest rates. All of the Company’s cash and cash equivalents are maintained at creditworthy financial institutions. At March 31, 2021, deposits exceeded the amount of any federal depository insurance provided.

The Company extends credit to customers in the normal course of business but typically does not require collateral or any other security to support amounts due. Management performs ongoing credit evaluations of its customers. An allowance for potentially uncollectible accounts is provided based on history, economic conditions, and composition of the accounts receivable aging. In some cases, the Company makes allowances for specific customers based on these and other factors. Provisions for the allowance for doubtful accounts are recorded in general and administrative expenses in the accompanying condensed consolidated statements of comprehensive loss.

The functional currency of the Company is the currency of the primary economic environment in which the entity operates, which is the U.S. dollar. For the Company’s non-U.S. subsidiaries that transact in a functional currency other than the U.S. dollar, assets and liabilities are translated at current rates of exchange at the balance sheet date. Income and expense items are translated at the average foreign currency exchange rates for the period. Adjustments resulting from the translation of the financial statements of its foreign operations into U.S. dollars are excluded from the determination of net loss and are recorded in accumulated other comprehensive income, a separate component of stockholders’ equity.

Realized foreign currency gains or losses arising from transactions denominated in foreign currencies are recorded in other (expense) income in the condensed consolidated statements of comprehensive loss. Unrealized foreign currency gains or losses arising from transactions denominated in foreign currencies are recorded in accumulated other comprehensive income (loss).

The Company considers all highly liquid temporary investments purchased with original maturities of 90 days or less to be cash equivalents. The Company holds restricted cash related to certificates of deposits and collateral in relation to lease agreements. As of March 31, 2021, $0.6 million of our $94.1 million of cash, cash equivalents and restricted cash balance was located outside the United States.

The following table presents the components of total cash, cash equivalents, and restricted cash as set forth in the Company’s condensed consolidated statements of cash flows:

	March 31, 2021		December 31, 2020
Cash and cash equivalents	$	93,828	$	113,683
Restricted cash		253		1,853
Total cash, cash equivalents, and restricted cash	$	94,081	$	115,536

Property and equipment are recorded at cost. Depreciation is recognized over the estimated useful lives of the related assets on a straight-line basis, except for tooling for which depreciation is recognized utilizing the units-of-production method prospectively

beginning on January 1, 2021. The Company changed to the units-of-production method to better reflect the pattern of economic consumption of the tooling. The prospective change to the units-of-production depreciation method had an immaterial impact on the Company’s results of operations for the three months ended March 31, 2021. Amortization of leasehold improvements is computed on a straight-line basis over the shorter of the remaining lease term or the estimated useful lives of the improvements and is included in depreciation expense. Demonstration equipment represents internally manufactured capital equipment that is used on-site at trade shows and at customer locations to demonstrate the Precision Flow system. Depreciation expense on demonstration equipment is recorded in sales and marketing expense in the condensed consolidated statements of comprehensive loss. Placement and evaluation systems represent capital equipment placed at customer locations under placement or evaluation agreements for which depreciation expense is included in cost of revenue in the accompanying condensed consolidated statements of comprehensive loss.

The Company provides its customers with a standard one-year warranty on its capital equipment sales. Warranty costs are accrued based on actual historical trends and estimated at the time of sale. The warranty liability is included within accrued expenses and other liabilities in the condensed consolidated balance sheets. A roll-forward of the Company’s warranty liability from December 31, 2020 to March 31, 2021 is as follows:

Balance at December 31, 2020	$	561
Provisions for warranty obligations		7
Settlements		(106	)
Balance at March 31, 2021	$	462

The Company’s revenue is primarily derived from the sale of products, leases and services. Product revenue consists of capital equipment and single-use disposables that are shipped and billed to customers both domestically and internationally. The Company’s main capital equipment products are the Precision Flow systems, the Vapotherm Transfer Unit 2.0 and Q50 compressor. The Company’s main disposable products are single-use disposables and nasal interfaces, or cannulas, and adaptors. Lease revenue consists of two components which include capital equipment that the Company leases to its customers and, in certain situations, an allocation from disposable revenue to other lease revenue upon the sale of disposable products in bundled arrangements involving the placement of Precision Flow capital units for use by the customer at no upfront charge in connection with the customer’s ongoing purchase of disposable products. Service revenue consists of fees associated with routine service of capital units, the sale of extended service contracts and preventative maintenance plans, which are purchased by a small portion of the Company’s customer base and revenue related to HGE’s “software as a service” platform. In addition, the Company sells small quantities of component parts in the United States, United Kingdom and to third-party international service centers who provide service on Precision Flow capital units outside of the United States and United Kingdom. Freight revenue is based upon actual freight costs plus a percentage markup of such costs associated with the shipment of products domestically, and to a lesser extent, internationally, and is included in service revenue. Rebates and fees consist of contractually obligated administrative fees and percentage-of-sales rebates paid to Group Purchasing Organizations (“GPOs”), Integrated Delivery Networks (“IDNs”) and distributor partners and accounted for as a reduction of service revenue.

Under the Financial Accounting Standard Board’s (“FASB”) Accounting Standards Codifications (“ASC”) 606, Revenue from Contracts with Customers (“ASC 606”), revenue is recognized when a customer obtains control of promised goods or services, in an amount that reflects the consideration which the Company expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the Company satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within each contract and assesses whether each promised good or service is distinct and determines those that are performance obligations. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. Sales, value-added, and other taxes collected on behalf of third parties are excluded from revenue. The Company’s standard payment terms are generally 30 days from the date of sale.

Contracts with customers may contain multiple performance obligations. For such arrangements, the transaction price is allocated to each performance obligation based on the estimated relative stand-alone selling prices of the promised products or services

underlying each performance obligation. The Company determines stand-alone selling prices based on the price at which the performance obligation is sold separately. If the stand-alone selling price is not observable through past transactions, the Company estimates the stand-alone selling price taking into account available information such as market conditions and internally approved pricing guidelines related to the performance obligations. Revenue is generally recognized when the customer obtains control of the Company’s product, which generally occurs at a point in time upon shipment based on the contractual shipping terms of a contract.

Product and service revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products or services to a customer. To the extent the transaction price includes variable consideration, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing the expected value amount method to which the Company expects to be entitled. As such, revenue on sales is recorded net of prompt pay discounts and payments made to GPOs, IDNs and distributors. Variable consideration is included in the transaction price if, in the Company’s judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. Determination of whether to include estimated amounts in the transaction price is based largely on an assessment of the Company’s anticipated performance and all information (historical, current and forecasted) that is reasonably available. The Company believes that the estimates it has established are reasonable based upon current facts and circumstances. Applying different judgments to the same facts and circumstances could result in different estimates.

When determining the transaction price of a contract, an adjustment is made if payment from a customer occurs either significantly before or significantly after performance, resulting in a significant financing component. Applying a practical expedient under ASC 606, the Company does not assess whether a significant financing component exists if the period between when the Company performs its obligations under the contract and when the customer pays is one year or less. None of the Company’s contracts contained a significant financing component during the three months ended March 31, 2021 or 2020.

The Company’s contracts with its customers generally have a duration of less than one year. Therefore, the Company has elected to apply a practical expedient and recognizes the incremental costs of obtaining contracts as an expense. These costs are included in sales and marketing expense in the accompanying condensed consolidated statements of comprehensive loss.

The Company also enters into agreements to lease its capital equipment. For such sales, the Company accounts for revenue under ASC 842, Leases (“ASC 842”), and assesses and classifies these transactions as sales-type or operating leases based on whether the lease transfers ownership of the equipment to the lessee by the end of the lease term. This criterion is met in situations in which the lease agreement provides for the transfer of title at or shortly after the end of the lease term. Equipment included in arrangements including transfer of title are accounted for as sales-type leases and the Company recognizes the present value of the lease payments due over the lease term as revenue at the inception of the lease. The Company records the present value of future lease payments in prepaid expenses and other current assets in the accompanying condensed consolidated balance sheets; these amounts totaled $2.1 million and $2.7 million at March 31, 2021 and December 31, 2020, respectively. Equipment included in arrangements that do not include the transfer of title, nor any of the sales-type or direct financing lease criteria, are accounted for as operating leases and revenue is recognized on a straight-line basis over the term of the lease.

The Company also enters into agreements involving the placement of Precision Flow capital units for use by the customer at no upfront charge in connection with the customer’s ongoing purchase of disposable products. In these bundled arrangements, revenue recognized for the sale of the disposables is allocated between disposable revenue and other lease revenue based on the estimated relative stand-alone selling prices of the individual performance obligation.

Amounts billed to customers for shipping and handling are included in service revenue. Shipping and handling costs are included in costs of sales. The total costs of shipping and handling for the three months ended March 31, 2021 and 2020 were $0.5 and $0.3 million, respectively.

When required by local jurisdictions, the Company bills its customers for sales tax and value-added tax calculated on each sales invoice and records a liability for the sales and value-added tax payable, which is included in accrued expenses and other liabilities in the condensed consolidated balance sheets. Sales tax and value-added tax billed to a customer are not included in the Company’s revenue.

The Company maintains an equity incentive plan to provide long-term incentives for employees, consultants, and members of the board of directors. The plan allows for the issuance of non-statutory and incentive stock options, restricted stock, unrestricted stock, stock units, including restricted stock units, and stock appreciation rights to employees, consultants and non-employee directors. The Company recognizes stock-based compensation expense for awards of equity instruments to employees and non-employees based on the grant date fair value of those awards in accordance with ASC Topic 718, Stock Compensation (“ASC 718”). ASC 718 requires all equity-based compensation awards, including grants of restricted shares and stock options, to be recognized as expense in the condensed consolidated statements of comprehensive loss based on their grant date fair values.

The fair value of each option grant is estimated on the grant date using the Black-Scholes option pricing model. The fair value is then amortized on a straight-line basis over the requisite service period of the awards, which is generally the vesting period. For performance-based awards, the related compensation cost is amortized over the performance period on an accelerated attribution basis. Compensation cost associated with performance awards is based on fair value on the date of grant and the number of units expected to be earned after assessing the probability that certain performance criteria will be met and the associated targeted payout level that is forecasted will be achieved. Cumulative adjustments are recorded each quarter to reflect estimated outcomes of the performance-related conditions until the results are determined and settled. Use of a valuation model requires management to make certain assumptions with respect to selected model inputs, including the expected life (weighted average period of time that the options granted are expected to be outstanding), the volatility of the Company’s common stock and an assumed risk-free interest rate. Expected volatility is calculated based on historical volatility of a group of publicly traded companies that the Company considers a peer group. The expected life is estimated using the simplified method for “plain vanilla” options. The risk-free interest rate is based on U.S. Treasury rates with a remaining term that approximates the expected life assumed at the date of grant. No dividend yield is assumed as the Company does not pay, and does not expect to pay, dividends on its common stock. The Company estimates forfeitures based on historical experience with pre-vested forfeitures. To the extent actual forfeitures differ from the estimate, the difference is recorded to compensation expense in the period of the forfeiture.

The Company recognizes stock-based expense for shares of its common stock issued pursuant to its 2018 Employee Stock Purchase Plan (“ESPP”) on a straight-line basis over the related offering period. The Company estimates the fair value of shares to be issued under the ESPP based on a combination of options valued using the Black-Scholes option pricing model. The expected life is determined based on the contractual term. Dividend yield and forfeiture rates are estimated in a manner similar to option grants described above and expected volatility is based on the Company’s historical volatility.

The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the condensed consolidated financial statements or in the Company’s tax returns. Deferred taxes are determined based on the difference between the financial reporting and tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. Changes in deferred tax assets and liabilities are recorded in the provision for income taxes. The Company assesses the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent it believes, based upon the weight of available evidence, that it is more likely than not that all or a portion of deferred tax assets will not be realized, a valuation allowance is established through a charge to income tax expense. Potential for recovery of deferred tax assets is evaluated by estimating the future taxable profits expected and considering prudent and feasible tax planning strategies.

The Company accounts for uncertainty in income taxes recognized in the condensed consolidated financial statements by applying a two-step process to determine the amount of tax benefit to be recognized. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination by the taxing authorities. If the tax position is deemed more likely-than-not to be sustained, the tax position is then assessed to determine the amount of benefit to recognize in the condensed consolidated financial statements. The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The provision for income taxes includes the effects of any resulting tax reserves, or unrecognized tax benefits, that are considered appropriate as well as the related net interest and penalties.

The Company’s major tax jurisdictions are the United States, New Hampshire and the United Kingdom. There is no provision or benefit for income taxes for the three months ended March 31, 2021 or 2020 because the Company has historically incurred operating losses and maintains a full valuation allowance against its United States net deferred tax assets.

Utilization of the net operating loss and tax credit carryforwards may be subject to a substantial annual limitation under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended (the “Code”) due to ownership change limitations that have occurred previously or that could occur in the future. These ownership changes may limit the amount of net operating loss and tax credit carryforwards that can be utilized to offset future taxable income and reduce taxes, respectively. The Company has not currently completed an evaluation of ownership changes through December 31, 2020 to assess whether utilization of the Company’s net operating loss and tax credit carryforwards would be subject to an annual limitation under Sections 382 and 383 of the Code. To the extent an ownership change is determined to have occurred under Sections 382 and 383 of the Code, the net operating loss and tax credit carryforwards may be subject to limitation.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). This standard requires that credit losses be reported using an expected losses model rather than the incurred losses model that is currently used and establishes additional disclosures related to credit risks. In November 2019, the FASB issued ASU 2019-10, Financial Instruments-Credit Losses (Topic 326), Derivative and Hedging (Topic 815) and Leases (Topic 842), which defers the effective date for ASU 2016-13 to interim and annual periods beginning after December 15, 2022 for private companies, emerging growth companies following private company adoption dates, or public entities meeting the definition of smaller reporting companies as of the date of issuance of this update. Since the Company met the definition of a smaller reporting company as of the date of issuance of this update, the Company is not required to adopt ASU 2016-13 until January 1, 2023. The Company has not yet determined the effects, if any, that the adoption of ASU 2016-13 may have on its financial position, results of operations, cash flows, or disclosures.