X0306 4 2020-03-01 0 0001323885 AtriCure, Inc. ATRC 0001666600 Noznesky Justin J 7555 INNOVATION WAY MASON OH 45040 0 1 0 0 SVP, Mktg & Business Develop Common Stock 2020-03-01 4 A 0 8459 0.00 A 85893 D Common Stock 2020-03-01 4 F 0 14638 38.42 D 71255 D The Reporting Person acquired these shares pursuant to a Restricted Stock Award under the AtriCure, Inc. 2014 Stock Incentive Plan. One third of the shares will vest annually upon the respective one, two, and three year anniversaries of the date of grant. The Reporting Person has elected to transfer these shares to the Company to satisfy the tax withholding obligation incurred upon the vesting and release of shares previously acquired pursuant to a Restricted Stock Award. /s/Justin J. Noznesky 2020-03-03