X0306 4 2017-03-01 0 0001323885 AtriCure, Inc. ATRC 0001213176 LUX ANDREW L 7555 INNOVATION WAY MASON OH 45040 0 1 0 0 SVP, Ops & Quality Common Stock 2017-03-01 4 A 0 20000 0.00 A 68095 D Common Stock 2017-03-01 4 F 0 2506 18.95 D 65589 D The Reporting Person acquired these shares pursuant to a Restricted Stock Award under the AtriCure, Inc. 2014 Stock Incentive Plan. The shares will vest 25% annually over four years from 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 Restricted Stock Awards. /s/ M. Andrew Wade as Attorney-In-Fact for Andrew L. Lux 2017-03-03