ATRICURE INC

Ticker: ATRC CUSIP: 04963C209 Class: Common Stock

Portolan Capital Management, LLC's Holding History (CIK: 0001350290)

Note: Option positions (PUT/CALL) are excluded.

Q4 2016

Shares 297,592 Value ($000) $5,824 Avg Close $18.12 Range $15.15 - $20.40

Q3 2016

Shares 249,418 Value ($000) $3,946 Avg Close $15.37 Range $13.45 - $17.27

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	297,592	$5,824	$18.12	$15.15 - $20.40
Q3 2016	249,418	$3,946	$15.37	$13.45 - $17.27