Insider Transaction Report for AtriCure, Inc.

Karen Prange, a director at AtriCure, Inc., reported a sale of 3,000 shares of common stock on May 20, 2026. The weighted average sale price was $28.65 per share, with transactions occurring between $28.60 and $28.76. Following this transaction, Prange holds 26,373 shares of common stock directly. This report is filed under Form 4.