X0206 3 2021-05-20 0 0001323885 AtriCure, Inc. ATRC 0001862458 Doraiswamy Vinayak 7555 INNOVATION WAY MASON OH 45040 0 1 0 0 Chief Scientific Officer Common Stock 24119 D Includes 15,568 shares of unvested restricted stock awarded under the AtriCure, Inc. 2014 Equity Incentive Plan. One third of the shares vest annually upon the respective one, two and three year anniversaries of the date of grant. Includes 879 shares acquired under the AtriCure, Inc. Employee Stock Purchase Plan. /s/ Vinayak Doraiswamy 2021-05-24