AtriCure, Inc. — Director's Dealing 2018

May 9, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AtriCure, Inc. (ATRC)
CIK: 0001323885
Period of Report: 2018-05-07

Reporting Person: Krell Elizabeth D (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-07	Common Stock	M	10000	$9.30	Acquired	29967	Direct
2018-05-08	Common Stock	S	10000	$22.82	Disposed	19967	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-07	Stock Option (right to buy)	$9.30	M	10000	Disposed	2023-05-23	Common Stock (10000)	Direct

Footnotes

F1: This transaction was executed in multiple trades at prices ranging from $22.63 to $22.97 per share. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2: These options were granted on May 23, 2013 and are exercisable cumulatively at a rate of 33% per annum beginning one year from date of grant.