TransMedics Group, Inc.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. Nature of the Business and Basis of Presentation

TransMedics Group, Inc. (“TransMedics Group” and, together with its consolidated subsidiaries, the “Company”) was incorporated in the Commonwealth of Massachusetts in October 2018. TransMedics, Inc. (“TransMedics”), an operating company and wholly owned subsidiary of TransMedics Group, was incorporated in the State of Delaware in August 1998. The Company is a medical technology company transforming organ transplant therapy for end-stage organ failure patients across multiple disease states. The Company developed the Organ Care System (“OCS”) to replace a decades-old standard of care. The OCS represents a paradigm shift that transforms organ preservation for transplantation from a static state to a dynamic environment that enables new capabilities, including organ optimization and assessment. The Company’s OCS technology replicates many aspects of the organ’s natural living and functioning environment outside of the human body. The Company also developed its National OCS Program (“NOP”), an innovative turnkey solution to provide outsourced organ procurement, OCS perfusion management and transplant logistics services, to provide transplant programs in the United States with a more efficient process to procure donor organs with the OCS. The Company's logistics services include aviation transportation, ground transportation and other coordination activity.

The accompanying condensed consolidated financial statements have been prepared on the basis of continuity of operations, realization of assets and the satisfaction of liabilities and commitments in the ordinary course of business. The Company believes that its existing cash of$400.6 million as of June 30, 2025 will be sufficient to fund its operations, capital expenditures, and debt service payments for at least the next 12 months following the filing of this Quarterly Report on Form 10-Q. If the Company needs to seek additional funding through equity financings, debt financings or strategic alliances, the Company may not be able to obtain financing on acceptable terms, or at all, and the terms of any financing may adversely affect the holdings or the rights of the Company’s shareholders. If the Company is unable to obtain funding when needed, the Company will be required to delay, reduce or eliminate some or all of its research and development programs, product expansion or commercialization efforts, or the Company may be unable to continue operations.

The Company is subject to risks and uncertainties common to companies in the medical device industry and of similar size, including, but not limited to, development by competitors of new technological innovations, dependence on key personnel, protection of proprietary technology, compliance with government regulations, uncertainty of market acceptance of products, and the need to obtain additional financing to fund operations. Products currently under development will require additional research and development efforts, including additional clinical testing and regulatory approval, prior to commercialization. These efforts require additional capital, adequate personnel, infrastructure and extensive compliance-reporting capabilities. The Company’s research and development may not be successfully completed, adequate protection for the Company’s technology may not be obtained, the Company may not obtain necessary government regulatory approval on its expected timeline, or at all, and approved products may not prove commercially viable. The Company operates in an environment of rapid change in technology and competition.

The Company’s condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”) of the Financial Accounting Standards Board (“FASB”). The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

2. Summary of Significant Accounting Policies

Unaudited Interim Financial Information

The accompanying unaudited interim financial statements and related notes have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto for the year ended December 31, 2024 included in the Company’s Annual Report on Form 10-K filed with the SEC. In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary for a fair statement of the Company’s financial position as of June 30, 2025 and results of operations for the three and six months ended June 30, 2025 and 2024 and cash flows for the six months ended June 30, 2025 and 2024, have been made. The Company’s results of operations for the three and six months ended June 30, 2025 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2025.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. Significant estimates and assumptions reflected in these unaudited condensed consolidated financial statements include, but are not limited to, revenue recognition, the valuation of inventory, the valuation of assets acquired and liabilities assumed in business combinations, including acquired intangible assets and the resulting goodwill, the valuation of stock-based awards, and income taxes. The Company bases its estimates on historical experience, known trends and other market-specific or other relevant factors that it believes to be reasonable under the circumstances. On an ongoing basis, management evaluates its estimates as there are changes in circumstances, facts and experience. Changes in estimates are recorded in the period in which they become known. As of the date of issuance of these unaudited condensed consolidated financial statements, the Company is not aware of any specific event or circumstance that would require the Company to update estimates, judgments or revise the carrying value of any assets or liabilities. Actual results may differ from those estimates or assumptions.

Risk of Concentrations of Credit, Significant Customers and Significant Suppliers

Financial instruments that potentially expose the Company to concentrations of credit risk consist primarily of cash and accounts receivable. The Company does not believe that it is subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships. As of June 30, 2025 and December 31, 2024, the Company hadno allowance for credit losses. Significant customers are those that accounted for 10% or more of the Company’s revenue or accounts receivable. For thethree and six months ended June 30, 2025 and 2024, no customer accounted for more than 10% of revenue. As of June 30, 2025 and December 31, 2024, no customer accounted for more than 10% of accounts receivable.

Certain of the components and subassemblies included in the Company’s products are obtained from a sole source, a single source or a limited group of suppliers, as are sterilization services. Although the Company seeks to reduce dependence on those limited sources of suppliers, manufacturers and service providers, the partial or complete loss of certain of these sources could have a material adverse effect on the Company’s operating results, financial condition and cash flows and damage its customer relationships.

Fair Value Measurements

Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three levels of the fair value hierarchy, of which the first two are considered observable and the last is considered unobservable:

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Level 1—Quoted prices in active markets for identical assets or liabilities.

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Level 2—Observable inputs (other than Level 1 quoted prices), such as quoted prices in active markets for similar assets or liabilities, quoted prices in markets that are not active for identical or similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data.

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Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to determining the fair value of the assets or liabilities, including pricing models, discounted cash flow methodologies and similar techniques.

The carrying values of the Company’s accounts receivable, accounts payable and accrued expenses approximate their fair values due to the short-term nature of these assets and liabilities. The carrying value of the Company’s long-term debt approximates its fair value (a level 2 measurement) at each balance sheet date due to its variable interest rate, which approximates a market interest rate. The Company's 1.50% convertible senior notes due 2028 (the “Notes”) are carried at the face value less unamortized debt discount and issuance costs on the accompanying condensed consolidated balance sheets, and the fair value of the Notes is presented at each reporting period for disclosure purposes only (see Note 7).

Spare Parts Inventory

Spare parts are used in aviation operations and are generally not for sale. Spare parts inventory is comprised of repairable and expendable spare aircraft parts, which are valued at the lower of cost or net realizable value, using the specific identification method. Storage costs and miscellaneous materials and supplies costs related to inventory or to support flight equipment are expensed as incurred. As of June 30, 2025 and December 31, 2024, spare parts inventory of$3.9 million and$4.0 million, respectively, is included within prepaid expenses and other current assets on the accompanying condensed consolidated balance sheets. The Company determines, based on the evidence that exists, whether or not it is appropriate to maintain a reserve for excess and obsolete spare parts inventory. The reserve is based on historical experience related to the disposal of inventory due to damage, physical deterioration, obsolescence, or other causes. As of June 30, 2025 and December 31, 2024, the Company had no allowance for spare parts excess and obsolescence.

Foreign Currency Translation

The functional currency of each of the Company’s foreign subsidiaries is the currency of the local country. Assets and liabilities of the Company’s foreign subsidiaries are translated into U.S. dollars using the period-end exchange rates, and income and expense items are translated into U.S. dollars using average exchange rates in effect during each period. The effects of these foreign currency translation adjustments are included in accumulated other comprehensive income (loss), a separate component of stockholders’ equity.

The Company also incurs transaction gains and losses resulting from intercompany transactions as well as transactions with customers or vendors denominated in currencies other than the functional currency of the legal entity in which the transaction is recorded. Realized and unrealized foreign currency transaction gains (losses) are included in the condensed consolidated statements of operations as a component of other income (expense). Realized and unrealized gains totaled$0.6 million and$1.0 million for the three and six months ended June 30, 2025, respectively, and realized and unrealized losses totaled$0.2 million and$0.4 million for the three and six months ended June 30, 2024, respectively.

Recently Issued Accounting Pronouncements

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires public entities, on an annual basis, to provide disclosure of specific categories in their tax rate reconciliations, as well as disclosure of income taxes paid disaggregated by jurisdiction. ASU 2023-09 is effective for the Company for the full fiscal year ending December 31, 2025. The Company is currently assessing the impact of the adoption of this guidance.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40) to improve financial reporting by requiring that public business entities disclose additional information about specific expense categories in the notes to financial statements at interim and annual reporting periods. ASU 2024-03 is effective for annual periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, with early adoption permitted. ASU 2023-09 allows for adoption using either a prospective or retrospective method. The Company is currently assessing the impact of the adoption of this guidance on its consolidated financial statements.

3. Inventory

Inventory consisted of the following (in thousands):

4. Property, Plant and Equipment, Net

Property, plant and equipment, net consisted of the following (in thousands):

The expected useful life of transplant aircraft equipment is 10 years and the expected useful life of internal-use software isfive years. Substantially all of the Company's tangible property, plant and equipment are held in the United States.

During the three and six months ended June 30, 2025, total depreciation and amortization expense was$6.7 million and$12.8 million, respectively. During the three and six months ended June 30, 2024, total depreciation and amortization expense was$4.5 million and$8.8 million, respectively.

The Company capitalized costs associated with the development of internal-use software of$2.2 million and$4.0 million in the three and six months ended June 30, 2025, respectively, and$0.5 million in the three and six months ended June 30, 2024. The Company recorded amortization expense of$0.4 million during the three and six months ended June 30, 2025, related to internal-use software placed into service in the three months ended June 30, 2025. The net book value of internal-use software was$8.0 million and$4.4 million as of June 30, 2025 and December 31, 2024, respectively, of which$1.1 million and$4.4 million was included in construction-in-progress as of those respective dates.

5. Goodwill and Intangible Assets

The carrying amount of goodwill was$11.5 million as of June 30, 2025 and December 31, 2024, and related to the Company’s 2023 acquisition of Summit Aviation, Inc. and Northside Property Group, LLC (together "Summit"). Goodwill is not amortized, but instead is reviewed for impairment at least annually or more frequently when events and circumstances occur indicating that the recorded goodwill may be impaired. To date, the Company has hadno impairments to goodwill.

Acquired intangible assets consisted of the following (in thousands):

Amortization expense is recorded within selling, general and administrative expense. Amortization expense was$0.1 million for each of thethree and six months ended June 30, 2025 and 2024. Future amortization expense of the intangible assets as of June 30, 2025 is expected to be as follows (in thousands):

6. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

7. Long-Term Debt and Financing Arrangements

Convertible Senior Notes

The Notes consisted of the following (in thousands):

As of June 30, 2025, the estimated fair value of the Notes was$724.8 million. The fair value was determined based on the quoted price of the last trade of the Notes prior to the end of the reporting period in an inactive market, which is considered as Level 2 in the fair value hierarchy.

On May 11, 2023, the Company issued $460.0 million aggregate principal amount of the Notes, in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act, pursuant to an indenture dated May 11, 2023, by and between the Company and U.S. Bank Trust Company, National Association (the “Indenture”).

The initial conversion price of the Notes is approximately $94.00 per share of common stock, which represents a premium of approximately 32.5% over the closing price of the Company’s common stock on May 8, 2023. The Notes will mature on June 1, 2028, unless earlier repurchased, redeemed or converted. The Company used $52.1 million of the proceeds from the sale of the Notes to fund the cost of entering into capped call transactions, described below. The proceeds from the issuance of the Notes were approximately $393.3 million, net of capped call transaction costs of $52.1 million and initial purchaser discounts and other debt issuance costs totaling $14.6 million.

The Notes bear interest at a rate of 1.50% per year and interest is payable semiannually in arrears on June 1 and December 1 of each year. The initial conversion rate is 10.6388 shares of common stock per $1,000 principal amount of the Notes, which represents an initial conversion price of approximately $94.00 per share of common stock. The conversion rate and conversion price are subject to customary adjustments upon the occurrence of certain events as described in the Indenture.

Before March 1, 2028, noteholders have the right to convert their Notes only upon the occurrence of certain events, including certain corporate events, and during thefive business days immediately after anyten consecutive trading days in which the trading price per $1,000 principal amount of Notes is less than ninety-eight percent (98%) of the as converted value. Additionally, the noteholder can convert their Notes during any calendar quarter (and only during such calendar quarter), commencing after the calendar quarter ending on September 30, 2023 but before March 1, 2028, provided the last reported sale price of the common stock for at least 20 trading days is greater than or equal to 130% of the conversion price during the 30 consecutive trading days ending on the last trading day of a calendar quarter. From and after March 1, 2028, noteholders may convert their Notes at any time at their election until the close of business on the second scheduled trading day immediately before the maturity date. The Company has the right to elect to settle conversions either in cash, shares or in a combination of cash and shares of its common stock.

Prior to June 8, 2026, the Notes will not be redeemable. On or after June 8, 2026, the Company may redeem for cash all or any portion of the Notes (subject to the partial redemption limitation set forth in the Indenture), at its option, if the last reported sale price of the Company’s common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption. In addition, calling any Note for redemption will constitute a “Make-Whole Fundamental Change” (as defined in the Indenture) with respect to that Note, in which case the conversion rate applicable to the conversion of that Note will be increased in certain circumstances if it is converted after it is called for redemption.

During the three and six months ended June 30, 2025, the Company recognized$2.4 million and$4.9 million, respectively, in interest expense related to the 1.50% cash coupon of the Notes and amortization of debt issuance costs. During thethree and six months ended June 30, 2024, the Company recognized$2.4 million and$4.8 million, respectively, in interest expense related to the 1.50% cash coupon of the Notes and amortization of debt issuance costs. During each of thethree and six months ended June 30, 2025 and 2024, the effective interest rate on the outstanding Notes was approximately 2.1%.

A conditional conversion feature of the Notes was triggered on June 30, 2025, as the last reported sale price of the Company's common stock was greater than or equal to 130% of the conversion price of the Notes for at least 20 trading days during the period of 30 consecutive trading days ending on and including the last trading day of the quarter ended June 30, 2025, and the Notes therefore became convertible at the noteholders’ election in the calendar quarter ended September 30, 2025 (and only during this calendar quarter). If this condition or another conversion condition is met in the future, the Notes may again become convertible, otherwise the Notes will be convertible at the noteholders’ election from March 1, 2028 through the close of business on the second scheduled trading day immediately before the maturity date.

Capped Call Transactions

In connection with the offering of the Notes, the Company entered into privately negotiated capped call transactions (the “Capped Calls”) with certain financial institution counterparties (the “Option Counterparties”). The Capped Calls are generally intended to reduce or offset the potential dilution to the common stock upon any conversion of the Notes with such reduction or offset, as the case may be, subject to a cap based on the cap price. For accounting purposes, the Capped Calls are separate transactions, and not part of the terms of the Notes. The Capped Calls are recorded in stockholders’ equity and are not accounted for as derivatives. The cost of $52.1 million incurred to purchase the Capped Calls was recorded as a reduction to common stock on the accompanying condensed consolidated balance sheets.

Each of the Capped Calls has an initial strike price of approximately $94.00 per share, subject to certain adjustments, which corresponds to the initial conversion price of the Notes. The Capped Calls have an initial cap price of $141.88 per share, subject to certain adjustments. The Capped Calls cover, subject to anti-dilution adjustments, approximately 4,893,848 shares of the Company’s common stock, which is the same number of shares of the Company’s common stock initially underlying the Notes. The Capped Calls are subject to automatic exercise over a 40 trading day period commencing on April 3, 2028, subject to earlier termination under certain circumstances.

Long-term debt

Long-term debt consisted of the following (in thousands):

In July 2022, the Company entered into a credit agreement with Canadian Imperial Bank of Commerce (“CIBC”), as amended by the First Amendment to Credit Agreement, dated as of May 8, 2023, by and among the Company and CIBC, the Second Amendment to Credit Agreement, dated as of June 23, 2023, by and among the Company and CIBC and the Third Amendment to Credit Agreement, dated as of November 9, 2023, by and among the Company and CIBC (as amended, the “CIBC Credit Agreement”), pursuant to which the Company borrowed $60.0 million.

Borrowings under the CIBC Credit Agreement bear interest at an annual rate equal to either, at the Company’s option, (i) the secured overnight financing rate for an interest period selected by the Company, subject to a minimum of 1.50%, plus 2.0% or (ii)1.0% plus the higher of a) the prime rate subject to a minimum of 4.0% or b) the Federal Funds Effective Rate, plus 0.5%. The Company is obligated to repay the outstanding borrowings in equal monthly installments commencing in July 2026 until the maturity date in July 2027. At the Company’s option, the Company may prepay outstanding borrowings under the CIBC Credit Agreement, without a prepayment fee.

All obligations under the CIBC Credit Agreement are guaranteed by the Company and each of its material subsidiaries. All obligations of the Company and each guarantor are secured by substantially all of the Company’s and each guarantor’s assets, including their intellectual property, subject to certain exceptions. Under the CIBC Credit Agreement, the Company has agreed to customary representations and warranties, events of default and certain affirmative and negative covenants to which it will remain subject until maturity. The financial covenants include, among other covenants, (x) a requirement to maintain a minimum liquidity amount of the greater of either (i) the consolidated adjusted EBITDA loss (or gain), as defined, for the trailing four month period (only if EBITDA is negative) and (ii) $10.0 million, and (y) a requirement to maintain total net revenue of at least 75% of the level set forth in the total revenue plan presented to CIBC. The obligations under the CIBC Credit Agreement are subject to acceleration upon the occurrence of specified events of default, including payment default, change in control, bankruptcy, insolvency, certain defaults under other material debt, certain events with respect to governmental approvals (if such events could cause a material adverse change in the Company’s business), failure to comply with certain covenants and a material adverse change in the Company’s business, operations or financial condition. As of June 30, 2025, the Company was in compliance with all financial covenants of the CIBC Credit Agreement. During the continuance of an event of default, the interest rate per annum will be equal to the rate that would have otherwise been applicable at the time of the event of default plus 2.0%. If an event of default (other than certain events of bankruptcy or insolvency) occurs and is continuing, CIBC may declare all or any portion of the outstanding principal amount of the borrowings plus accrued and unpaid interest to be due and payable. Upon the occurrence of certain events of bankruptcy or insolvency, all of the outstanding principal amount of the borrowings plus accrued and unpaid interest will automatically become due and payable. In addition, the Company may be required to prepay outstanding borrowings, subject to certain exceptions, with portions of net cash proceeds of certain asset sales and certain casualty and condemnation events.

During the three and six months ended June 30, 2025, the Company recognized$1.0 million and$2.1 million, respectively, in interest expense related to the CIBC borrowings. During the three and six months ended June 30, 2024, the Company recognized$1.2 million and$2.4 million, respectively, in interest expense related to the CIBC borrowings. During each of the three and six months ended June 30, 2025, the weighted average effective interest rate on outstanding borrowings under the CIBC Credit Agreement was approximately 6.8%. During the three and six months ended June 30, 2024, the weighted average effective interest rate on outstanding borrowings under the CIBC Credit Agreement was approximately 7.9% and 7.8%, respectively. The stated interest rate applicable to borrowings under the CIBC Credit Agreement was 6.3% in June 2025.

8. Stock-Based Compensation

2019 Stock Incentive Plan

The 2019 Stock Incentive Plan (the “2019 Plan”) provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units (“RSUs”), unrestricted stock, unrestricted stock units, and other stock-based awards to employees, directors, and consultants of the Company and its subsidiaries. The number of shares of common stock of TransMedics Group initially available for issuance under the 2019 Plan was 3,428,571 shares, plus the number of shares underlying awards under the previously outstanding 2014 Stock Incentive Plan (the “2014 Plan”), not to exceed 1,595,189 shares, that expire or are terminated, surrendered, or cancelled without the delivery of shares, are forfeited to or repurchased by TransMedics Group or otherwise become available again for grant. Since the effectiveness of the Company’s 2019 Plan in April 2019, no awards have been made or will be made under the 2014 Plan.

Shares withheld in payment of the exercise or purchase price of an award or in satisfaction of tax withholding requirements, and the shares covered by a stock appreciation right for which any portion is settled in stock, will reduce the number of shares available for issuance under the 2019 Plan. In addition, the number of shares available for issuance under the 2019 Plan (i) will not be increased by any shares delivered under the 2019 Plan that are subsequently repurchased using proceeds directly attributable to stock option exercises and (ii) will not be reduced by any awards that are settled in cash or that expire, become unexercisable, terminate or are forfeited to or repurchased by TransMedics Group without the issuance of stock under the 2019 Plan. On May 25, 2023, the shareholders of the Company approved the Amended and Restated TransMedics Group, Inc. 2019 Stock Incentive Plan (the “Amended Plan”) to among other things, (i) increase the number of shares of the Company’s common stock available for issuance thereunder by 1,000,000 shares, (ii) prohibit the payment of dividend or dividend equivalents on a current basis with respect to unvested awards, (iii) extend the expiration date of the Amended Plan until June 1, 2033 and (iv) increase the annual limits on non-employee director compensation. As of June 30, 2025,427,182 shares of common stock were available for issuance under the Amended Plan.

2021 Inducement Plan

In August 2021, the Company’s board of directors approved the TransMedics Group, Inc. Inducement Plan (the “Inducement Plan”). Pursuant to the terms of the Inducement Plan, the Company may grant nonqualified stock options, stock appreciation rights, restricted stock, unrestricted stock, RSUs and performance awards to individuals who were not previously employees or directors of the Company or individuals returning to employment after a bona fide period of non-employment with the Company. A total of 1,000,000 shares of the Company’s common stock were initially available for issuance under the Inducement Plan. On November 2, 2023, the Company's Board of Directors approved an increase of 500,000 to shares available under the Inducement Plan. As of June 30, 2025,440,515 shares of common stock remained available for issuance under the Inducement Plan.

2019 Employee Stock Purchase Plan

Pursuant to the Company’s 2019 Employee Stock Purchase Plan (the “2019 ESPP”), certain employees of the Company are eligible to purchase common stock of the Company at a reduced price during offering periods. The 2019 ESPP permits participants to purchase common stock using funds contributed through payroll deductions, subject to the limitations set forth in the Internal Revenue Code, at a purchase price of 85% of the lower of the closing price of the Company’s common stock on the first trading day of the offering period or the closing price on the applicable purchase date, which is the final trading day of the applicable offering period. A total of 371,142 shares of TransMedics Group common stock were initially reserved for issuance under the 2019 ESPP. During thesix months ended June 30, 2025,24,268 shares of common stock were issued under the 2019 ESPP and as of June 30, 2025,208,988 shares of common stock remained available for issuance under the 2019 ESPP.

Stock Option Activity

During the six months ended June 30, 2025, the Company granted options under the 2019 Plan and the Inducement Plan with service-based vesting for the purchase of an aggregate of 296,672 shares of common stock with a weighted average grant-date fair value of$50.24 per share.

Restricted Stock Unit Activity

During the six months ended June 30, 2025, the Company granted 349,262 RSUs under the 2019 Plan and the Inducement Plan with service-based vesting conditions and a weighted average grant-date fair value of$78.46 per share.

Stock-Based Compensation

The Company recorded stock-based compensation expense in the following expense categories of its condensed consolidated statements of operations (in thousands):

As of June 30, 2025, total unrecognized compensation cost related to unvested share-based awards was$75.9 million, which is expected to be recognized over a weighted average period of 2.4 years.

9. Net Income (Loss) per Share

Basic net income (loss) per common share is computed by dividing the net income (loss) by the weighted average number of shares of common stock outstanding for the period. Diluted net income (loss) per common share is computed by dividing net income (loss) by the weighted average number of shares of common stock outstanding for the period, including potential dilutive common shares assuming the dilutive effect of outstanding stock awards, using the treasury stock method, and outstanding convertible notes, using the if-converted method.

A reconciliation of the numerators and the denominators of the basic and dilutive net income per common share computations are as follows (in thousands, except share and per share amounts):

The Company excluded the following potential common shares, presented based on weighted average shares outstanding, from the computation of diluted net income per share because including them would have had an anti-dilutive effect:

10. Commitments and Contingencies

Operating Leases

There have been no material changes to the Company’s leases during the six months ended June 30, 2025. For additional information, please read Note 12 Leases, to the consolidated financial statements in the Company’s Form 10-K for the year ended December 31, 2024.

401(k) Savings Plan

The Company has a defined-contribution savings plan under Section 401(k) of the Internal Revenue Code. This plan covers substantially all employees who meet minimum age and service requirements and allows participants to defer a portion of their compensation on a pre-tax basis. Company contributions to the plan may be made at the discretion of the board of directors. Effective January 1, 2023, the Company instituted an employer matching program for the plan pursuant to which the Company will match 100% of the first 3% of each participating employee’s eligible compensation contributed to the plan and 50% of up to an additional 2% each participating employee’s eligible compensation contributed to the plan. For thethree and six months ended June 30, 2025, the Company recorded expense of$0.9 million and$2.0 million, respectively, related to these matching contributions. For the three and six months ended June 30, 2024, the Company recorded expense of$1.0 million and$1.6 million, respectively, related to these matching contributions.

Indemnification Agreements

In the ordinary course of business, the Company may provide indemnification of varying scope and terms to customers, vendors, lessors, business partners, and other parties with respect to certain matters including, but not limited to, losses arising out of breach of such agreements, negligence or willful misconduct, or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with members of its board of directors and executive officers that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or services as directors or officers.

The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is, in many cases, unlimited. To date, the Company has not incurred any material costs as a result of such indemnifications. The Company is not currently aware of any indemnification claims and had not accrued any liabilities related to such obligations in its condensed consolidated financial statements as of June 30, 2025 and December 31, 2024.

Unconditional Purchase Commitment

In January 2021, the Company entered into an unconditional $9.5 million purchase commitment, in the ordinary course of business, for goods with specified annual minimum quantities to be purchased through December 2029. The contract is not cancellable without penalty. The remaining purchase commitment as of June 30, 2025 was$5.0 million.

Legal Proceedings

On February 14, 2025, a class action captioned Jewik v. TransMedics Group, Inc., et al., Case No. 1:25-cv-10385, was filed against the Company and certain of its current and former officers in the United States District Court for the District of Massachusetts. The complaint purports to assert claims pursuant to Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, and SEC Rule 10b-5 promulgated thereunder, on behalf of a putative class of investors who purchased or otherwise acquired the Company’s shares between February 28, 2023 and January 10, 2025 (the “Class Period”). Plaintiff seeks to recover unspecified damages allegedly caused by purported misstatements and omissions contained in certain risk disclosures set forth in the Company’s 2022 and 2023 Annual Reports. The complaint alleges the disclosures at issue were false or misleading, because they failed to describe what plaintiff alleges were coercive business and marketing tactics, anticompetitive conduct and fraudulent billing activities on the part of the Company. The complaint claims these alleged statements and omissions operated to artificially inflate the price paid for the Company’s common stock during the Class Period. On April 2, 2025, another purported stockholder filed a putative class action lawsuit against the Company and certain of its current and former officers, also in the United States District Court for the District of Massachusetts (Collins v. TransMedics Group, Inc., et al., Case No. 1:25-cv-10778). The Collins complaint alleged claims substantially similar to those alleged in the Jewik action and also sought unspecified damages. On May 22, 2025, the court consolidated the Jewik and Collins actions and appointed the Peace Officers’ Annuity and Benefit Fund of Georgia and Oguzhan Altun as lead plaintiffs (the “Lead Plaintiff”). Lead Plaintiff’s consolidated amended complaint is due August 8, 2025.

At each reporting date, the Company evaluates whether or not a potential loss amount or a potential range of loss is probable and reasonably estimable under the provisions of the authoritative guidance that addresses accounting for contingencies. At this time, the Company is unable to predict the outcome of the class action litigation or reasonably estimate a range of possible losses. The Company expenses as incurred the costs related to such legal proceedings.

11. Revenue and Segment Information

Disaggregated Revenue

The Company disaggregates revenue from contracts with customers related to OCS transplant by organ type and geographical area as it believes this presentation best depicts how the nature, amount, timing and uncertainty of the Company’s revenue and cash flows are affected by economic factors, as shown below (in thousands):

(1)

Revenue by country is categorized based on the location of the end customer. Total OCS transplant revenue includes product and service revenue.

(2)

Service revenue unrelated to OCS transplant, which was$1.0 million and$1.9 million for thethree and six months ended June 30, 2025, respectively, and$1.1 million and$2.0 million for thethree and six months ended June 30, 2024, respectively, is not included in this table.

Payments to Customers

In connection with its clinical trials, the Company makes payments to customers for reimbursement of clinical trial materials and customer’s costs incurred to execute specific clinical trial protocols related to the Company’s OCS products, which are recorded as a reduction of revenue. The Company records the reduction of revenue and a corresponding accrual for its estimate of the payments in the same period as the revenue is recognized. The Company updates its accrual estimates as information related to these payments is received with a corresponding adjustment to revenue. For each of the three and six months ended June 30, 2025 and 2024, the net impact of adjustments to revenue for such payments was insignificant.

The Company also makes payments to customers to obtain information related to post-approval studies or existing standard-of-care protocols unrelated to the Company's OCS products and records such payments as operating expenses. For the three and six months ended June 30, 2025, the Company recorded$1.7 million and$3.0 million, respectively, of operating expense related to these costs. For the three and six months ended June 30, 2024, the Company recorded$1.2 million and$2.7 million, respectively, of operating expense related to these costs.

Segment Information

The Company manages its operations as a single segment for the purposes of assessing performance and making operating decisions. Operating segments are defined as components of an enterprise for which separate financial information is regularly evaluated by the Company’s chief operating decision maker, or decision-making group (the “CODM”), in deciding how to allocate resources and assess performance. The CODM of the Company is the Chief Executive Officer. The CODM assesses performance and allocates resources based on the Company’s consolidated statements of operations and the Company’s operations are managed on a consolidated basis to decide where to allocate and invest additional resources within the business to continue growth. The CODM also utilizes the consolidated balance sheet for resource allocation and segment asset information is not provided to the CODM to allocate resources.

As a single reportable segment entity, the Company’s segment performance measure is net income (loss). Significant segment expenses, as provided to the CODM, are presented below (in thousands):

(1)Other segment items include interest income, interest expense, foreign currency exchange gains and losses and income taxes. See thecondensed consolidated financial statements for other financial information regarding the Company’s operating segment.

12. Related Party Transactions

Employment of Dr. Amira Hassanein

Dr. Amira Hassanein, who serves as Product Director for the Company’s OCS Lung program, is the sister of Dr. Waleed Hassanein, the Company’s President and Chief Executive Officer and a member of the Company’s board of directors. The Company paid Dr. Amira Hassanein approximately$0.1 million and$0.5 million in total compensation for the three and six months ended June 30, 2025, respectively, for her services as an employee. The Company paid Dr. Amira Hassanein approximately$0.1 million and$0.2 million in total compensation for the three and six months ended June 30, 2024, respectively, for her services as an employee.

13. Income Taxes

For the three and six months ended June 30, 2025, the Company recorded income tax expense of$1.3 million and$2.3 million, respectively, consisting primarily of state income taxes. For the three months ended June 30, 2024, the Company recorded an immaterial tax benefit and for the six months ended June 30, 2024, recorded income tax expense of$0.2 million, consisting primarily of state income taxes.

The Company had net U.S. deferred tax assets of $148.9 million at December 31, 2024 which were offset in full by a valuation allowance. At each reporting period the Company evaluates the realizability of its deferred tax assets, which are comprised principally of net operating loss carryforwards. At June 30, 2025 and December 31, 2024, the Company provided a valuation allowance for the full amount of its net deferred tax assets because it was not more likely than not that the net deferred tax asset will be realized. It is possible that in the next twelve months there may be sufficient positive evidence to release a portion or all of the Company’s U.S. valuation allowance. Release of the remaining valuation allowance would result in a benefit to income tax expense for the period the release is recorded, which could have a material impact on net earnings. The timing and amount of the potential valuation allowance release are subject to management judgment, as well as prospective earnings in the United States.

14. Subsequent Events

On July 4, 2025, the One Big Beautiful Bill Act (“OBBBA”) was enacted in the United States. The OBBBA includes significant changes to federal tax law and other regulatory provisions that may impact the Company. As the legislation was not signed into law until the Company’s third quarter of 2025, the impacts are not included in its operating results for the three and six months ended June 30, 2025. The Company will evaluate the impact of the OBBBA and its impact on the Company's forecasted annual effective tax rate in subsequent periods as required.

In July 2025, the Company purchasedtwo parcels of land in Mirandola, Italy for a total purchase price of $2.6 million, the full amount of which was held in escrow as a deposit as of June 30, 2025. Accordingly, as of June 30, 2025, $2.6 million was included in prepaid expenses and other current assets on the accompanying condensed consolidated balance sheets.