X0609 4 2026-06-30 0 0001323885 AtriCure, Inc. ATRC 0001230584 CARREL MICHAEL H false 7555 INNOVATION WAY MASON OH 45040-9695 1 1 0 0 President, CEO, & Director 0 Common Stock 2026-06-30 4 A 0 636 23.78 A 779134 D Common Stock 14310 I Held by reporting person's children Common Stock 2250 I Held by reporting person's parents Common Stock 1000 I Held by reporting person's sibling Shares acquired pursuant to the AtriCure, Inc. 2018 Employee Stock Purchase Plan for the period ended June 30, 2026. In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the issuer's common stock on June 30, 2026, which is the last trading day of the applicable offering period. The closing price on June 30, 2026, was $27.98. The reporting person disclaims beneficial ownership of these securities, except as to his pecuniary interest therein. /s/ Allison Walker as Attorney-in-fact for Michael H. Carrel 2026-07-02