Amendment to Current Report (Form 8-K/A)

For immediate release

May 6, 2026

AtriCure Reports First Quarter 2026 Financial Results

•First Quarter 2026 worldwide revenue of $141.2 million, an increase of 14.3% year over year

•First Quarter 2026 profitability improved, with net income of $0.1 million and adjusted EBITDA of $17.1 million

•U.S. revenue growth accelerated to 14.9%, driven by AtriClip FLEX-Mini®, cryoSPHERE® MAX™, EnCompass® clamp, and AtriClip PRO-Mini®

MASON, Ohio, May 6, 2026 - AtriCure, Inc. (Nasdaq: ATRC), a leading innovator in surgical treatments and therapies for atrial fibrillation (Afib), left atrial appendage (LAA) management and post-operative pain management, today announced first quarter 2026 financial results.

"Our first quarter results reflect the durability of AtriCure's growth model, fueled by disciplined execution and increased adoption of our innovative products," said Michael Carrel, President and Chief Executive Officer at AtriCure. "Strong revenue growth, combined with improving profitability and meaningful advancement across our clinical initiatives, gives us confidence that we are building a foundation to drive the next era of growth and value creation for AtriCure and our shareholders."

First Quarter 2026 Financial Results

Worldwide revenue for the first quarter 2026 was $141.2 million, an increase of 14.3% over first quarter 2025 revenue (12.8% on a constant currency basis). U.S. revenue was $116.2 million, an increase of $15.1 million or 14.9%, compared to the first quarter 2025. U.S. revenue growth was driven by sales of our cryoSPHERE® MAX™ probe for post-operative pain management, AtriClip FLEX-Mini® and AtriClip PRO-Mini® devices for appendage management, and the EnCompass® clamp in open ablation. International revenue increased $2.6 million or 11.5% (3.3% on a constant currency basis) to $25.0 million, with growth across most of our direct markets in appendage management, open ablation, and pain management.

Gross profit for the first quarter 2026 was $109.3 million compared to $92.6 million for the first quarter 2025. Gross margin was 77.4% for the first quarter 2026, an increase of 246 basis points from the first quarter 2025, driven primarily by favorable product and geographic mix. Income from operations for the first quarter 2026 was $0.5 million, compared to a loss from operations of $6.0 million for the first quarter 2025. Basic and diluted net income per share was breakeven at $0.00 for the first quarter 2026, compared to net loss per share of $0.14 for the first quarter 2025.

Adjusted EBITDA for the first quarter 2026 was $17.1 million, an increase of $8.3 million or 95% from the first quarter 2025. For the first quarter 2026, net income per share and adjusted income per share were breakeven at $0.00, compared to $0.14 net loss per share and adjusted loss per share for the first quarter 2025. For both 2026 and 2025, the per share amounts are equivalent because there were no reconciling items between the GAAP and non-GAAP results for the periods.

Constant currency revenue, adjusted EBITDA and adjusted income (loss) per share are non-GAAP financial measures. We discuss these non-GAAP financial measures and provide reconciliations to GAAP measures later in this release.

2026 Financial Guidance

Full year 2026 revenue is projected to be approximately $600 million to $610 million, and management also projects full year 2026 Adjusted EBITDA of approximately $80 million to $82 million. Full year 2026 adjusted earnings per share is expected to be in the range of $0.09 to $0.15, and net earnings per share is expected to be in the range of $0.00 to $0.04. Additionally, management expects continued positive cash flow generation for 2026.

Conference Call

AtriCure hosted a conference call at 4:30 p.m. Eastern Time on Tuesday, May 5, 2026, to discuss first quarter 2026 financial results. To access the webcast, please visit the Investors page of AtriCure's corporate website at https://ir.atricure.com/events-and-presentations/events. Participants are encouraged to register more than 15 minutes before the webcast start time. A replay of the presentation will be available for 90 days following the presentation.

About AtriCure

AtriCure, Inc. provides innovative technologies for the treatment of Afib and related conditions. Afib affects more than 59 million people worldwide. Surgeons around the globe use AtriCure technologies for the treatment of Afib, reduction of Afib related complications, and post-operative pain management. AtriCure's Isolator® Synergy™ Ablation System is the first medical device to receive FDA approval for the treatment of persistent Afib. AtriCure's AtriClip® Left Atrial Appendage Exclusion System products are the most widely sold LAA management devices worldwide. AtriCure's Hybrid AF™ Therapy is a minimally invasive procedure that provides a lasting solution for long-standing persistent Afib patients. AtriCure's cryoICE cryoSPHERE® and cryoXT® probes are cleared for temporary ablation of peripheral nerves to block pain, providing pain relief in cardiac, thoracic and amputation procedures. For more information, visit AtriCure.com or follow us on X @AtriCure.