AtriCure, Inc. — Director's Dealing 2017

May 17, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AtriCure, Inc. (ATRC)
CIK: 0001323885
Period of Report: 2017-05-16

Reporting Person: Krell Elizabeth D (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-16	Common Stock	M	10000	$10.10	Acquired	24162	Direct
2017-05-17	Common Stock	S	10000	$21.44	Disposed	14162	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-16	Stock Option (right to buy)	$10.10	M	10000	Disposed	2018-05-28	Common Stock (10000)	Direct

Footnotes

F1: This transaction was executed in multiple trades at prices ranging from $21.37 to $21.65 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 28, 2008 and are exercisable cumulatively at a rate of 33% per annum beginning one year from date of grant.