AtriCure, Inc.

1. DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of the Business—The “Company” or “AtriCure” consists of AtriCure, Inc. and its wholly-owned subsidiaries. AtriCure is a leading innovator in surgical treatments and therapies for atrial fibrillation (Afib), left atrial appendage (LAA) management and post-operative pain management, and sells its products to medical centers globally through both its direct sales force and distributors.

Basis of Presentation—The accompanying interim financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (SEC). All intercompany accounts and transactions have been eliminated in consolidation. The accompanying interim financial statements are unaudited, but in the opinion of the Company’s management, contain all normal, recurring adjustments considered necessary to present fairly the financial position, results of operations and cash flows for the periods presented in conformity with accounting principles generally accepted in the United States of America (GAAP) applicable to interim periods. Certain information and footnote disclosures included in annual financial statements prepared in accordance with GAAP have been omitted or condensed. The Company believes the disclosures herein are adequate to make the information presented not misleading. Results of operations are not necessarily indicative of the results expected for the full year or for any future period.

The accompanying interim financial statements should be read in conjunction with the Company’s audited financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 filed with the SEC. Except as discussed herein, there have been no changes in the Company's significant accounting policies for the three months ended March 31, 2026 as compared to the significant accounting policies described in the Company's Annual Report on Form 10-K for the year ended December 31, 2025.

Use of Estimates—The preparation of the financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense. Actual results could differ from those estimates.

Segments—The Company evaluates reporting segments in accordance with the Financial Accounting Standards Board's (FASB) Accounting Standards Codification (ASC) 280, "Segment Reporting". The chief operating decision maker for AtriCure is the Chief Executive Officer. The Company hasone business activity and operates asone operating segment: the development, manufacture and sale of devices used by physicians in surgical procedures, designed primarily for the surgical ablation of cardiac tissue, the exclusion of the left atrial appendage and ablation of peripheral nerves to temporarily block pain. These devices are developed and marketed to a broad base of medical centers globally. Management considers all such sales to be part of the single operating segment. The Chief Executive Officer is regularly provided with consolidated expenses consistent with the presented consolidated statements of operations, accompanied by information about revenue by product type and geographic area, for purposes of allocating resources and net income (loss) is the measure used in evaluating financial performance. Revenue by product type and geographic area is included at Note 9 – Revenue. The Company’s long-lived assets are located in the United States, except for $6,017 as of March 31, 2026 and $6,292 as of December 31, 2025 located primarily in Europe.

2. FAIR VALUE

Fair value is defined as the exchange price that would be received for an asset or paid to settle 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. To measure the fair value of assets and liabilities, the Company uses the following fair value hierarchy based on three levels of inputs:

•Level 1—Observable inputs, such as quoted prices in active markets for identical assets or liabilities.

•Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

•Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The following table represents the Company’s fair value hierarchy for its financial assets measured at fair value on a recurring basis as of March 31, 2026:

There were no changes in the levels or methodology of measurement of financial assets and liabilities during the three months ended March 31, 2026.

The following table represents the Company’s fair value hierarchy for its financial assets measured at fair value on a recurring basis as of December 31, 2025:

Contingent Consideration. The Company’s contingent consideration arrangements arising from the SentreHEART acquisition obligate the Company to pay certain defined amounts to former shareholders of SentreHEART if specified milestones are met related to the aMAZE™ IDE clinical trial, including PMA approval and reimbursement for the therapy involving SentreHEART’s devices. The PMA approval milestone expired December 31, 2023, while the achievement period for the reimbursement milestone expires on December 31, 2026. The Company assessed the projected probability of payment during the contractual achievement periods as remote, resulting inno reported fair value as of March 31, 2026 and December 31, 2025.

3. INVENTORIES

Inventories consist of the following:

4. INTANGIBLE ASSETS

The following table provides a summary of the Company’s intangible assets:

The following table summarizes the allocation of amortization expense of intangible assets:

Future amortization expense is projected as follows:

5. ACCRUED LIABILITIES

Accrued liabilities consist of the following:

6. BORROWINGS AND FINANCING OBLIGATION

Asset backed revolving credit facility. The Company has an asset-based credit facility (Credit Agreement) with JPMorgan Chase Bank, N.A. (JPMCB, also the administrative agent) and Silicon Valley Bank (a division of First-Citizen Bank and Trust Company). The Credit Agreement provides a $125,000 asset-based revolving credit facility (ABL Facility), and the Company may request an increase in the revolving commitment up to $40,000 (not to exceed a total of $165,000). A portion of the ABL Facility, limited to $5,000, is available for the issuance of letters of credit by JPMCB or other financial institutions. JPMCB in its sole discretion, may create swingline loans by advancing floating rate revolving loans requested. Any such swingline loans will reduce availability under the ABL Facility on a dollar-for-dollar basis.

On January 9, 2026, the Company entered into a First Amendment to Credit Agreement. The First Amendment provides athree-year extension of the term of the Credit Agreement, and all outstanding borrowings are due upon the maturity of the Credit Agreement on January 9, 2029. Subject to customary exceptions and restrictions, the Company may voluntarily prepay outstanding amounts under the ABL Facility at any time without premium or penalty. Any voluntary prepayments will not reduce lender commitments under the ABL Facility. The Credit Agreement contains mandatory prepayment provisions which require prepayment of amounts outstanding under the ABL Facility upon specified events or availability shortfall. The First Amendment provides for a reduction in the overall interest rate on loans under the ABL Facility and removes the minimum utilization financial covenant in addition to certain other loan administration updates. Following closing, the Company paid down $865 of borrowings. The First Amendment was treated as a debt modification.

As of March 31, 2026, the Company had total borrowings of $61,000 and had unused borrowing capacity of $62,750 under the ABL Facility. Future maturities of long-term debt are projected as follows:

The ABL Facility is subject to a commitment fee of 0.37% per annum of the daily available revolving commitment and paid on a quarterly basis. Outstanding amounts bear interest at a rate per annum equal to, at the Company's election: (i) an alternate base rate (ABR) plus an applicable margin or (ii) a term secured overnight financing rate (SOFR) plus an applicable margin. All swingline loans bear interest at a rate per annum equal to the ABR plus the applicable margin. Alternate base rate is equal to the greatest of Prime, the NYFRB Rate plus 0.50% and the Term SOFR rate plus 1.00%. The applicable margin on borrowings will adjust ranging from 1.25% to 1.50% per annum for ABR borrowings and from 2.25% to 2.50% per annum for Term SOFR borrowings determined by the average historical excess availability. As of March 31, 2026, the effective interest rate on the ABL Facility was 6.18%.

The ABL Facility is secured by the assets of the Company, consisting of personal, tangible or intangible property, including certain outstanding equity interests of the Company’s direct subsidiaries, subject to limitations specified in the Credit Agreement. The Credit Agreement contains customary representations and warranties, events of default and financial, affirmative and negative covenants for facilities of this type, including but not limited to financial covenants relating to a fixed charge coverage ratio, and restrictions on indebtedness, liens, investments and acquisitions, asset dispositions, specified agreements, restricted payments and prepayment of certain indebtedness.

Financing obligation. In August 2025, the Company transferred legal ownership of a building and certain real property on its corporate headquarters campus in Mason, Ohio for cash consideration of $6,250. Simultaneously, the Company entered into a contract to lease back the existing building and real property, as well as the planned building expansion space from the buyer-lessor. The buyer-lessor is financing the development and construction of the expansion of additional manufacturing and office space. During construction of the expansion, the Company will maintain occupancy and pay rent for the existing building. Upon construction completion, the expanded premises will be leased forfifteen years with three five-year options to renew. Annual rental payments will be calculated at an amount equal to 8% of the construction costs and will escalate 3% annually. Rental payments will be allocated between the existing and the expanded property based on the relative fair value upon construction completion. Expansion rental payments are projected to be $38,469 for thefifteen-year lease term expected to begin during 2026. The classification of the lease related to the expansion will be assessed upon completion of construction. Rental payments will be finalized upon completion of the expansion construction. Estimated rental payments for the expansion over the next five annual periods are as follows:

The lease of the existing building and certain real property sold is a failed sale-and-leaseback as a result of finance lease classification. The Company recorded a financing obligation equal to the $6,250 cash proceeds received. The Company allocated projected rental payments during the term of construction andfifteen-year lease term based on the estimated fair value of the existing real property assets and future expansion. The Company imputes interest monthly at a rate of 6.76%. During the three months ended March 31, 2026, interest expense was not significant.

Future maturities of the financing obligation are projected as follows:

The financing obligation is included in Other current liabilities and Other noncurrent liabilities on the Condensed Consolidated Balance Sheet.

7. LEASES

The Company has operating and finance leases for office, manufacturing and warehouse facilities and automobiles. The Company’s leases have remaining lease terms of less thantwo years toten years. Options to renew or extend leases beyond their initial term have been excluded from measurement of the right-of-use (ROU) assets and lease liabilities as exercise is not reasonably certain.

The weighted average remaining lease term and the discount rate for the reporting periods are as follows:

A letter of credit for $1,250 issued to the lessor of the Company's corporate headquarters building is renewed annually and remains outstanding as of March 31, 2026.

The components of lease expense are as follows:

Short-term lease expense was not significant for the three months ended March 31, 2026 and 2025.

Supplemental cash flow information related to leases is as follows:

Supplemental balance sheet information related to leases is as follows:

Future maturities of lease liabilities as of March 31, 2026 are as follows:

8. COMMITMENTS AND CONTINGENCIES

Cooperation Agreement. The Company holds an exclusive licensing agreement (Cooperation Agreement) to co-develop and commercialize equipment incorporating pulsed field ablation (PFA) technology. The Cooperation Agreement requires the Company to pay contingent consideration, settled in cash, with a maximum total payout of $28,000 if all milestones are achieved successfully through the agreement term ending in 2034. As of the reporting date, the Company has paid $6,000 towards milestone achievements which were recorded as Research & Development expense when each milestone was achieved. For the three months ended March 31, 2026 and 2025, no milestones were achieved and therefore, there is no financial impact during the periods. The agreement also contains provisions requiring future royalty payments on devices incorporating co-developed technology upon commercialization.

Purchase Agreements. The Company enters into standard purchase agreements with suppliers in the ordinary course of business, generally with terms that allow cancellation. In 2022, the Company entered into a clinical trial management agreement for the LeAAPS clinical trial. The terms of the agreement require payments upon achievement of various enrollment and project milestones over the estimatedten-year term, however, the agreement may be terminated early for any reason. Furthermore, the Company incurs additional variable costs, including pass through costs from clinical trial sites. Payments made under this agreement were $3,889 and $4,112 for the three months ended March 31, 2026 and 2025, respectively. In 2025, the Company entered into a non-cancellable cloud computing arrangement with a term ofseven years requiring total payments of $3,616. Payments under this agreement will begin in the first half of 2026.

Legal. The Company may, from time to time, become a party to legal proceedings which are subject to many uncertainties. Litigation and administrative proceedings over patent and other intellectual property rights are common in our industry, as are requests for information related to interactions with medical professionals. Accordingly, the financial impact of ultimate resolutions from legal proceedings may not be known for extended periods of time and are not predictable with assurance. A liability is established once management determines a loss is probable and an amount can be reasonably estimated. The Company recognizes income from a favorable resolution of legal proceedings when the associated cash or assets are received.

On February 7, 2025, the representative for former securityholders of SentreHEART, Inc. filed a complaint in the Delaware Court of Chancery naming the Company as a defendant, and on May 23, 2025 filed a first amended complaint. The Company acquired SentreHEART, Inc. pursuant to a merger agreement dated August 11, 2019. The merger agreement provides for contingent consideration to be paid upon achievement of specified PMA and CPT reimbursement milestones by specified dates. The amended complaint alleges breach of contract and a related claim for breach of the implied covenant of good faith and fair dealing resulting from the Company's alleged failure to use commercially reasonable efforts to obtain premarket approval from FDA for the LARIAT® System. The amended complaint seeks damages in the amount of the original PMA and CPT reimbursement milestones of up to $260,000 plus interest. The Company intends to vigorously defend this claim. A liability has not been recognized related to this matter because any potential loss is not currently probable or reasonably estimable.

9. REVENUE

The Company develops, manufactures and sells devices designed for surgical ablation of cardiac tissue, exclusion of the left atrial appendage, and temporarily blocking pain by ablating peripheral nerves. These devices are marketed to a broad base of medical centers globally and primarily used by cardiothoracic and thoracic surgeons. The Company recognizes revenue when control of promised goods is transferred to customers in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods.

United States revenue by product type is as follows:

International revenue by product type is as follows:

Revenue attributed to customer geographic locations is as follows:

10. INCOME TAX PROVISION

The Company files federal, state and foreign income tax returns in jurisdictions with varying statutes of limitations. The Company uses the asset and liability method to determine its provision for income taxes. The Company’s provision for income taxes in interim periods is computed by applying the discrete method and is based on financial results through the end of the interim period. The Company determined that using the discrete method is more appropriate than using the annual effective tax rate method. The Company is unable to estimate the annual effective tax rate with sufficient precision to use the effective tax rate method, which requires a full-year projection of income. The effective tax rate for the three months ended March 31, 2026 and 2025 was 72.6% and (3.7%). The Company’s worldwide effective tax rate differs from the US statutory rate of 21% primarily due to valuation allowances.

The Company's federal, state, local and foreign tax returns are subject to review by various taxing authorities. The Company has not accrued any interest and penalties related to unrecognized income tax benefits as a result of offsetting net operating losses. However, if required, the Company will recognize interest and penalties within income tax expense and within the related tax liability.

11. EQUITY COMPENSATION PLANS

The Company hastwo share-based incentive plans: the 2023 Stock Incentive Plan (2023 Plan) and the 2018 Employee Stock Purchase Plan (ESPP).

Stock Incentive Plan

Under the 2023 Plan, the Board of Directors may grant restricted stock awards or restricted stock units (collectively RSAs), nonstatutory stock options, performance share awards, performance share units or stock appreciation rights to Company employees, directors and consultants, and may grant incentive stock options to Company employees. The Compensation Committee of the Board of Directors, as the administrator of the 2023 Plan, has the authority to determine the terms of any awards, including the number of shares subject to each award, the exercisability of the awards and the form of consideration. As of March 31, 2026,5,787 shares of common stock have been reserved for issuance under the 2023 Plan, and 1,138 shares were available for future grants. The Company issues registered shares of common stock for stock option exercises, restricted stock grants and performance share award payments.

Employee Stock Purchase Plan

Under the ESPP, shares of the Company’s common stock may be purchased at a discount (15%) to the lesser of the closing price of the Company’s common stock on the first or last trading day of the offering period. The offering period (currentlysix months) and the offering price are subject to change. Participants may not purchase more than $25 of the Company’s common stock in a calendar year or more than 3 shares during an offering period. As of March 31, 2026, there were 295 shares available for future issuance under the ESPP.

Share-Based Compensation Expense Information

The following table summarizes the allocation of share-based compensation expense:

12. EARNINGS PER SHARE

Basic earnings per share is computed by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share reflects net income available to common stockholders divided by the weighted average number of common shares outstanding during the period, including the effect of dilutive common share equivalents. Dilutive equivalents include shares issuable upon the vesting of restricted stock awards and restricted stock units, the exercise of stock options and shares issuable under the Company's employee ESPP.

The computation of diluted earnings per share in the three months ended March 31, 2026 and 2025 excludes the effect of 1,156 and 3,008 shares because the effect would be anti-dilutive.

13. COMPREHENSIVE LOSS AND ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

In addition to net income (loss), comprehensive income (loss) includes foreign currency translation adjustments. Accumulated other comprehensive income (loss) consisted of the following, net of tax: