<SEC-DOCUMENT>0000945621-18-000110.txt : 20180214
<SEC-HEADER>0000945621-18-000110.hdr.sgml : 20180214
<ACCEPTANCE-DATETIME>20180214132455
ACCESSION NUMBER:		0000945621-18-000110
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20180214
DATE AS OF CHANGE:		20180214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AtriCure, Inc.
		CENTRAL INDEX KEY:			0001323885
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				341940305
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-81467
		FILM NUMBER:		18610388

	BUSINESS ADDRESS:	
		STREET 1:		7555 INNOVATION WAY
		CITY:			MASON
		STATE:			OH
		ZIP:			45040
		BUSINESS PHONE:		513-755-4100

	MAIL ADDRESS:	
		STREET 1:		7555 INNOVATION WAY
		CITY:			MASON
		STATE:			OH
		ZIP:			45040

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Hudson Executive Capital LP
		CENTRAL INDEX KEY:			0001652522
		IRS NUMBER:				472878186
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		1185 AVENUE OF THE AMERICAS, 32ND FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036
		BUSINESS PHONE:		(212) 521-8495

	MAIL ADDRESS:	
		STREET 1:		1185 AVENUE OF THE AMERICAS, 32ND FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>hudsonatrc13da02132018.htm
<DESCRIPTION>AMENDMENT NO. 1 TO SCHEDULE 13D
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; FONT-WEIGHT: bold; TEXT-ALIGN: center; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">(Amendment No.&#160;1&#160;)*</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: center; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">(Name of Issuer)</div>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 75%" valign="top">&#160; </td>
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<td style="WIDTH: 75%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; TEXT-ALIGN: center" valign="top">&#160;Common Stock,&#160;par value $.001</td>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 75%" valign="top">&#160; </td>
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<td style="WIDTH: 75%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; TEXT-ALIGN: center" valign="top">04963C209</td>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: center; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">(CUSIP Number)</div>
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<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">Michael D. Pinnisi</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">Hudson Executive Capital LP</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">1185 Avenue of the Americas, 32nd Floor</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">New York, NY 10036</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">with a copy to:</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">David A. Vaughan</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">Dechert LLP</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">1095 Avenue of the Americas</div>

<div style="TEXT-ALIGN: center; DISPLAY: block; TEXT-INDENT: 0pt">New York, NY&#160; 10036<font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; DISPLAY: inline">&#160;</font></div>

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<td style="FONT-SIZE: 10pt; BORDER-TOP: black 1px solid; FONT-FAMILY: times new roman; WIDTH: 100%; TEXT-ALIGN: center">&#160;(Name, Address and Telephone Number of Person</td>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%; TEXT-ALIGN: center">&#160;Authorized to Receive Notices and Communications)</td>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: center">&#160;&#160;<font style="FONT-WEIGHT: bold">February&#160;12, 2018</font></td>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%; TEXT-ALIGN: center">&#160;(Date of Event Which Requires Filing of This Statement)</td>
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<div>&#160;</div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of &#167;&#167;240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.&#160;&#160;&#9744;</div>

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<div style="DISPLAY: block; TEXT-INDENT: 0pt">Note:&#160; Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.&#160; See Rule.13d-7 for other parties to whom copies are to be sent.</div>

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<div style="DISPLAY: block; TEXT-INDENT: 0pt">* <font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; DISPLAY: inline">The remainder of this cover page shall be filled out for a reporting person&#8217;s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.</font> </div>

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<div style="TEXT-ALIGN: justify; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">The information required in the remainder of this cover page shall not be deemed to be &#8220;filed&#8221; for the purpose of Section 18 of the Securities Exchange Act of 1934 (the &#8220;Act&#8221;) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CUSIP No.&#160;&#160;04963C209</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: center; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SCHEDULE 13D</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: right; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">P<font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-VARIANT: normal">age&#160;2</font> of&#160;7&#160;Pages</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
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<table id="08a9add61cf0425dab9d460c92a20714" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
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<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">1</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;<font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">NAMES OF REPORTING PERSON</font></font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<br>
</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">Hudson Executive Capital LP</font></font></div>
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<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">&#160;</td>
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<td style="WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">2</div>

<div>&#160;</div>
</td>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; BORDER-RIGHT: medium none; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;(a)&#160;&#160;&#9744;</div>

<div>&#160;(b)&#160;&#160;&#9744;</div>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">3</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top" colspan="2"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">SEC USE ONLY</font> </font>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
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<tr>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">4</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top" colspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">SOURCE OF FUNDS</div>

<div>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; AF</div>
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<td style="WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">5</div>
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<td style="BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO<br>
 ITEMS 2(d) or 2(e)</div>

<div>&#160;</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: medium none" valign="top">
<div style="MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#9744;</div>
</td>
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<tr>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">6</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div>
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CITIZENSHIP OR PLACE OF ORGANIZATION</div>

<div style="MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;</font><font style="FONT-WEIGHT: normal">Delaware</font></font></div>
</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: medium none" valign="top">&#160;</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="1d7284612a764d0aa70a32b1dae4790d" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: center; BORDER-LEFT: black 1px solid" valign="middle" rowspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">7</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SOLE VOTING POWER</div>

<div style="TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">0</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">8</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SHARED VOTING POWER</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="FONT-WEIGHT: normal">2,374,119</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">9</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SOLE DISPOSITIVE POWER</div>

<div style="TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font style="FONT-WEIGHT: normal">0</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">10</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SHARED DISPOSITIVE POWER</div>

<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">2,374,119</font></div>
</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="4fd58c8700c24139973d9a67e960bc97" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">11</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;2,374,119</div>
</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="6d9e9c550d5c45128f3414752a428cad" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">12</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CERTAIN SHARES</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#9744;</div>
</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="ae97d9e481274c5c83163ae73b8f1fd2" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: 4px; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">13</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: 4px" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)<br>
 EXCLUDES CERTAIN SHARES</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: #000000 2px solid; FONT-WEIGHT: bold; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">&#160;</td>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: #000000 2px solid" valign="top" align="left">&#160;&#160;&#160;&#160;&#160;&#160; 6.9%<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; FONT-VARIANT: normal; FONT-WEIGHT: normal; FONT-STYLE: normal"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller">(1)</sup></font></td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: 4px; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">14</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: 4px" valign="top" align="left">
<div style="TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">TYPE OF REPORTING PERSON</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">&#160;</td>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold" valign="top" align="left">&#160;&#160;&#160; <font style="FONT-WEIGHT: normal">PN, IA</font></td>
</tr>
</table>
</div>
</div>

<div style="TEXT-ALIGN: left">&#160;</div>

<div style="TEXT-ALIGN: left">&#160;</div>

<div style="TEXT-ALIGN: left">_______________________________</div>

<div style="TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-VARIANT: normal; FONT-WEIGHT: normal; FONT-STYLE: normal"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller">(1)</sup></font> Calculated based on 34,474,119 shares of common stock, par value $.001&#160;per share, of AtriCure, Inc., outstanding as of October 30,&#160;2017, as reported in AtriCure,&#160;Inc.'s quarterly report on Form 10-Q for the quarter ended September&#160;30,&#160;2017.</div>

<div style="TEXT-ALIGN: left">&#160;</div>

<div id="DSPFPageBreakArea" style="MARGIN-BOTTOM: 10pt; CLEAR: both; MARGIN-TOP: 10pt">
<div id="DSPFPageBreak" style="PAGE-BREAK-AFTER: always">
<hr style="BORDER-LEFT-WIDTH: 0px; HEIGHT: 2px; BORDER-RIGHT-WIDTH: 0px; WIDTH: 100%; BORDER-BOTTOM-WIDTH: 0px; COLOR: #000000; CLEAR: both; MARGIN: 4px 0px; BORDER-TOP-WIDTH: 0px; BACKGROUND-COLOR: #000000" noshade="noshade">
</div>
</div>

<div style="TEXT-ALIGN: left">&#160;</div>

<div style="TEXT-ALIGN: left">&#160;</div>

<div style="TEXT-ALIGN: left">
<div>&#160;</div>

<div>&#160;</div>

<div>
<div style="TEXT-ALIGN: left">
<table id="z357c7ea629d640d99111f02e4710515f" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: black 1px solid; BORDER-RIGHT: black 1px solid; WIDTH: 30%; BORDER-BOTTOM: black 4px; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CUSIP No.&#160;&#160;04963C209</div>
</td>
<td style="BORDER-TOP: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 4px; TEXT-ALIGN: center" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: center; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SCHEDULE 13D</div>
</td>
<td style="BORDER-TOP: black 1px solid; BORDER-RIGHT: black 1px solid; WIDTH: 33%; BORDER-BOTTOM: black 4px; TEXT-ALIGN: right; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: right; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">P<font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-VARIANT: normal">age&#160;3</font> of&#160;7&#160;Pages</div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 30%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
<td style="WIDTH: 13%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 33%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
</tr>
</table>

<div style="TEXT-ALIGN: left">
<table id="zef69f797cf614386b373763b2bf501bf" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">1</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;<font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">NAMES OF REPORTING PERSON</font></font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<br>
</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;<font style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">HEC Management GP LLC</font></font></div>
</td>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">2</div>

<div>&#160;</div>
</td>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; BORDER-RIGHT: medium none; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;(a)&#160;&#160;&#9744;</div>

<div>&#160;(b)&#160;&#160;&#9744;</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">3</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top" colspan="2"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">SEC USE ONLY</font> </font>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">4</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top" colspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">SOURCE OF FUNDS</div>

<div>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; AF</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">5</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO<br>
 ITEMS 2(d) or 2(e)</div>

<div>&#160;</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: medium none" valign="top">
<div style="MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#9744;</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">6</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div>
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CITIZENSHIP OR PLACE OF ORGANIZATION</div>

<div style="MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline"><font style="LETTER-SPACING: 9pt">&#160;</font><font style="FONT-WEIGHT: normal">Delaware</font></font></div>
</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: medium none" valign="top">&#160;</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="z05b1b3b10e35409093ccee7cdd9fcf1f" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: center; BORDER-LEFT: black 1px solid" valign="middle" rowspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">7</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SOLE VOTING POWER</div>

<div style="TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">0</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">8</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SHARED VOTING POWER</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="FONT-WEIGHT: normal">2,374,119</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">9</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SOLE DISPOSITIVE POWER</div>

<div style="TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font style="FONT-WEIGHT: normal">0</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">10</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SHARED DISPOSITIVE POWER</div>

<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">2,374,119</font></div>
</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="z57721c5ad5a145d1a40413ab2b26ae18" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">11</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;2,374,119</div>
</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="zd8e08a0358fc4ab480b4bff2afb46e59" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">12</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CERTAIN SHARES</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#9744;</div>
</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="zdfadd4ae60714ec8b1435bfbf3cddb9c" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: 4px; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">13</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: 4px" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)<br>
 EXCLUDES CERTAIN SHARES</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: #000000 2px solid; FONT-WEIGHT: bold; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">&#160;</td>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: #000000 2px solid" valign="top" align="left">&#160;&#160;&#160;&#160;&#160;&#160; 6.9%<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; FONT-VARIANT: normal; FONT-WEIGHT: normal; FONT-STYLE: normal"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller">(2)</sup></font></td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: 4px; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">14</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: 4px" valign="top" align="left">
<div style="TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">TYPE OF REPORTING PERSON</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">&#160;</td>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold" valign="top" align="left">&#160;&#160;&#160;<font style="FONT-WEIGHT: normal"> OO</font></td>
</tr>
</table>
</div>
</div>

<div style="TEXT-ALIGN: left">&#160;</div>

<div style="TEXT-ALIGN: left">&#160;</div>

<div style="TEXT-ALIGN: left">_______________________________</div>

<div style="TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-VARIANT: normal; FONT-WEIGHT: normal; FONT-STYLE: normal"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller">(2)</sup></font> Calculated based on 34,474,119 shares of common stock, par value $.001&#160;per share, of AtriCure, Inc., outstanding as of October 30,&#160;2017, as reported in AtriCure,&#160;Inc.'s quarterly report on Form 10-Q for the quarter ended September&#160;30,&#160;2017.</div>
</div>
</div>
</div>

<div id="PGBRK" style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">
<div id="FTR">
<div id="GLFTR" style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; WIDTH: 100%; TEXT-ALIGN: left"></div>
</div>

<div id="PN" style="WIDTH: 100%; PAGE-BREAK-AFTER: always">
<div style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; WIDTH: 100%; TEXT-ALIGN: center"></div>

<div style="WIDTH: 100%; TEXT-ALIGN: center">
<hr style="COLOR: black" size="2" noshade="noshade">
</div>
</div>

<div id="HDR">
<div id="GLHDR" style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; WIDTH: 100%; TEXT-ALIGN: right"></div>
</div>
</div>

<div>&#160;</div>

<div>
<div style="TEXT-ALIGN: left">
<table id="fe13208ad1cb40148a24fcccd55e4767" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: black 1px solid; BORDER-RIGHT: black 1px solid; WIDTH: 30%; BORDER-BOTTOM: black 4px; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CUSIP No.&#160;&#160;04963C209</div>
</td>
<td style="BORDER-TOP: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 4px; TEXT-ALIGN: center" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: center; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SCHEDULE 13D</div>
</td>
<td style="BORDER-TOP: black 1px solid; BORDER-RIGHT: black 1px solid; WIDTH: 33%; BORDER-BOTTOM: black 4px; TEXT-ALIGN: right; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: right; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">P<font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-VARIANT: normal">age&#160;4</font> of&#160;7&#160;Pages</div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 30%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
<td style="WIDTH: 13%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 33%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
</tr>
</table>

<div style="TEXT-ALIGN: left">
<table id="2d8e9a9163704ebd86332c4bca7b7519" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">1</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;<font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">NAMES OF REPORTING PERSON</font></font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<br>
</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">Douglas L. Braunstein</font></font></div>
</td>
<td style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: times new roman; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">2</div>

<div>&#160;</div>
</td>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; BORDER-RIGHT: medium none; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;(a)&#160;&#160;&#9744;</div>

<div>&#160;(b)&#160; &#9744;</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">3</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top" colspan="2"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">SEC USE ONLY</font> </font>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">4</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top" colspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">SOURCE OF FUNDS</div>

<div>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; AF</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">5</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO<br>
 ITEMS 2(d) or 2(e)</div>

<div>&#160;</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: medium none" valign="top">
<div style="MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#9744;</div>
</td>
</tr>

<tr>
<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; FONT-WEIGHT: bold; BORDER-LEFT: black 1px solid" valign="top" align="left">6</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div>
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CITIZENSHIP OR PLACE OF ORGANIZATION</div>

<div style="MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; DISPLAY: inline"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;</font><font style="FONT-WEIGHT: normal">United States</font></font></div>
</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: medium none" valign="top">&#160;</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="61b730cea6ec43008ae41b79109647fb" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: center; BORDER-LEFT: black 1px solid" valign="middle" rowspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">7</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SOLE VOTING POWER</div>

<div style="TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">0</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">8</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SHARED VOTING POWER</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="FONT-WEIGHT: normal">2,374,119</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">9</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SOLE DISPOSITIVE POWER</div>

<div style="TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; DISPLAY: inline">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font style="FONT-WEIGHT: normal">0</font></div>
</td>
</tr>

<tr>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 5%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">10</div>
</td>
<td style="BORDER-RIGHT: black 1px solid; WIDTH: 82%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">SHARED DISPOSITIVE POWER</div>

<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font style="FONT-WEIGHT: normal">2,374,119</font></div>
</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="c6a7ab5d50fd44458bdcbc0aba6b582c" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">11</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 94%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;2,374,119</div>
</td>
</tr>
</table>
</div>

<div style="TEXT-ALIGN: left">
<table id="5a627aaacfe64326a4bb93b562c11736" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 6%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-LEFT: black 1px solid" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">12</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 81%; BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left" valign="top">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CERTAIN SHARES</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">&#160;</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: black 1px solid; WIDTH: 13%; BORDER-BOTTOM: black 1px solid" valign="top" align="left">
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">13</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)<br>
 EXCLUDES CERTAIN SHARES</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">14</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">TYPE OF REPORTING PERSON</div>
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<div style="TEXT-ALIGN: left">_______________________________</div>

<div style="TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-VARIANT: normal; FONT-WEIGHT: normal; FONT-STYLE: normal"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller">(3)</sup></font> Calculated based on 34,474,119 shares of common stock, par value $.001&#160;per share, of AtriCure, Inc., outstanding as of October 30,&#160;2017, as reported in AtriCure,&#160;Inc.'s quarterly report on Form 10-Q for the quarter ended September&#160;30,&#160;2017.</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CUSIP No.&#160;&#160;04963C209</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">ITEM 1. SECURITY AND ISSUER</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; BACKGROUND-COLOR: #ffffff">This first amendment to Schedule 13D ("Amendment No. 1")&#160;relates to </font>the Common Stock, par value $.001 per share (the &#8220;Shares&#8221;), of AtriCure, Inc.,&#160;a Delaware corporation (the &#8220;Issuer&#8221;), and supplements the information set forth in Schedule 13D filed on January 24, 2017 (the "Original Schedule 13D" and together with this Amendment No. 1, the "Schedule 13D")<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; BACKGROUND-COLOR: #ffffff">. The principal executive offices of the Issuer are located at 7555 Innovation Way, Mason, OH 45040.</font></div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">The Reporting Persons (as defined below) beneficially own an aggregate of 2,374,119 Shares (the &#8220;Subject Shares&#8221;).&#160; The Subject Shares represent approximately 6.9% of the issued and outstanding Shares based on 34,474,119 Shares outstanding as of October&#160;30, 2017, as reported in AtriCure,&#160;Inc.&#8217;s quarterly report on Form 10-Q for the quarter ended September&#160;30, 2017.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">ITEM 2. IDENTITY AND BACKGROUND</div>

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<div style="TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">(a)</font><font id="TRGRRTFtoHTMLTab" style="FONT-SIZE: 1px; WIDTH: 36pt; DISPLAY: inline-block">&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">This statement is being filed by Hudson Executive Capital LP, a Delaware limited partnership (&#8220;Hudson Executive&#8221;), HEC Management GP&#160;LLC, a Delaware limited liability company ("Management GP"),&#160;and&#160;Douglas L. Braunstein (together with Hudson Executive and Management GP,&#160;the &#8220;Reporting Persons&#8221;).</font></div>

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<div style="TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">(b)</font><font id="TRGRRTFtoHTMLTab" style="FONT-SIZE: 1px; WIDTH: 36pt; DISPLAY: inline-block">&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">The principal business address of the Reporting Persons is c/o Hudson Executive Capital&#160;LP, 1185 Avenue of the Americas, 32nd Floor, New York, NY 10036.</font></div>

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<div style="TEXT-ALIGN: justify"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">(c)</font><font id="TRGRRTFtoHTMLTab" style="FONT-SIZE: 1px; WIDTH: 36pt; DISPLAY: inline-block">&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; COLOR: #000000">Hudson Executive&#8217;s principal business is to serve as investment advisor to certain affiliated investment funds (the &#8220;HEC Funds&#8221;).&#160; The principal occupation of Mr. Braunstein is to serve as the Managing Partner of Hudson Executive and the Managing Member of Hudson Executive&#8217;s general partner, HEC Management GP LLC, a Delaware limited liability company (the &#8220;Management GP&#8221;). </font>

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<div style="TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">(d)</font><font id="TRGRRTFtoHTMLTab" style="FONT-SIZE: 1px; WIDTH: 36pt; DISPLAY: inline-block">&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">None&#160;of the Reporting Persons, nor any of their officers or managing directors, have during the last five years been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).</font></div>

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<div style="TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">(e)</font><font id="TRGRRTFtoHTMLTab" style="FONT-SIZE: 1px; WIDTH: 36pt; DISPLAY: inline-block">&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">None&#160;of the Reporting Persons, nor any of their officers or managing directors, have during the last five years been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction which resulted in a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violations with respect to such laws.</font></div>

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<div style="TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">(f)</font><font id="TRGRRTFtoHTMLTab" style="FONT-SIZE: 1px; WIDTH: 36pt; DISPLAY: inline-block">&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">Hudson Executive is a Delaware limited partnership.&#160; Management GP is a Delaware limited liability company.&#160; Mr. Braunstein&#160;is a&#160;citizen of the United States.&#160; </font><br style="LINE-HEIGHT: 11.4pt">
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">Item 3 of this Schedule 13D is amended and restated in its entirety as follows:</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">As of the date hereof, the Reporting Persons are deemed to beneficially own the Subject Shares as detailed in Items 1 and 5.&#160; The aggregate purchase price for the 2,374,119 Subject Shares is $39,170,361.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">T<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; BACKGROUND-COLOR: #ffffff">he source of funding for the transactions pursuant to which the Reporting Persons obtained beneficial ownership of the Shares was derived from the respective capital of the HEC Funds.</font></div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-WEIGHT: bold; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">CUSIP No.&#160;&#160;04963C209</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">ITEM 4. PURPOSE OF TRANSACTION</div>

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<div style="MARGIN-BOTTOM: 8pt; FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; TEXT-ALIGN: left; LINE-HEIGHT: 13.55pt">The Reporting Persons acquired the Shares over which they exercise beneficial ownership in the belief that the Shares are undervalued and are an attractive investment. Certain of the Reporting Persons have had and may continue to have discussions with the Issuer&#8217;s management and members of the board of directors of the Issuer (the &#8220;Board&#8221;) to discuss the Issuer&#8217;s business, strategies and corporate governance. The Reporting Persons have found their conversations to date with the Board and management to be constructive, and may seek to have additional conversations with the management, Board, stockholders of the Issuer, and other persons to discuss the Issuer&#8217;s business, strategies, corporate governance and other matters related to the Issuer. These discussions have included, and may continue to include, options for enhancing shareholder value through various strategic alternatives including, but not limited to, optimizing the cash flows associated with their existing product portfolio, maximizing the value of and priortizing the capital allocation for various pipeline products, the evaluation of potential strategic partners,&#160;and general corporate matters.<br style="LINE-HEIGHT: 11.4pt">
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; BACKGROUND-COLOR: #ffffff">Hudson Executive, as the investment adviser to the HEC Funds, may be deemed to share power to vote or direct the vote of (and share power to dispose or direct the disposition of) the Subject Shares.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt; BACKGROUND-COLOR: #ffffff">By virtue of his&#160;role with respect to Hudson Executive and the Management&#160;GP,&#160;Mr. Braunstein&#160;may be deemed to share power to vote or direct the vote of (and share power to dispose or direct the disposition of) the Subject Shares and, therefore, each may be deemed to be a beneficial owner of the Subject Shares.</div>

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<div style="TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">(c)</font><font id="TRGRRTFtoHTMLTab" style="FONT-SIZE: 1px; WIDTH: 36pt; DISPLAY: inline-block">&#160;</font><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000">All transactions in the Shares effected during the past 60&#160;days on behalf of an HEC Fund over which the Reporting Persons have investment discretion are set forth in Exhibit&#160;2 attached hereto and incorporated herein by reference.</font></div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.</div>

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<DESCRIPTION>JOINT FILING AGREEMENT OF THE REPORTING PERSONS
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<div style="FONT-SIZE: 11pt; FONT-FAMILY: 'Times New Roman', serif; COLOR: #000000; TEXT-ALIGN: justify; LINE-HEIGHT: 12.55pt">The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D may be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements.&#160; The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained herein and therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows that such information is inaccurate.</div>

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&#160;</td>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 11%" valign="top">&#160;</td>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 2%" valign="top">&#160; </td>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-ALIGN: left; MARGIN-LEFT: 0pt; DISPLAY: block; MARGIN-RIGHT: 0pt; TEXT-INDENT: 0pt">Douglas L. Braunstein</div>
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<td style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; WIDTH: 11%" valign="top">&#160; </td>
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<DOCUMENT>
<TYPE>EX-2
<SEQUENCE>3
<FILENAME>exhibit2.htm
<DESCRIPTION>SCHEDULE OF TRANSACTIONS EFFECTED DURING THE LAST 60 DAYS
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">EXHIBIT 2</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">SCHEDULE OF TRANSACTIONS EFFECTED DURING THE LAST 60&#160;DAYS</div>
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<div id="DSPFPageHeader"></div>

<table id="zadf367af0af34e5881530594c3addf91" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0">
<tr style="HEIGHT: 15px">
<td style="BORDER-TOP: #000000 1px double; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Party Effecting Transaction</div>
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<td style="BORDER-TOP: #000000 1px double; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Transaction</div>
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<td style="BORDER-TOP: #000000 1px double; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">&#160;Date</div>
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<td style="BORDER-TOP: #000000 1px double; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Quantity</div>
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<td style="BORDER-TOP: #000000 1px double; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Average Price</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP&#160;</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center; BORDER-LEFT: #000000 1px solid">Buy</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center; BORDER-LEFT: #000000 1px solid">12/14/2017</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center; BORDER-LEFT: #000000 1px solid">300</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; TEXT-ALIGN: center; BORDER-LEFT: #000000 1px solid">$18.04</td>
</tr>

<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Buy</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">12/22/2017</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">5,880</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">$18.03</div>
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<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Buy</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">12/26/2017</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">2,929</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">$18.04</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Buy</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">1/5/2018</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">8,000</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">$18.00</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Buy</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">2/6/2018</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">49,349</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">$15.90</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Buy</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">2/7/2018</div>
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<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">12,000</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">$15.97</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Buy</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">2/9/2018</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">34,160</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">$15.22</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Buy</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">2/12/2018</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">240,000</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">$15.44</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 33.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px double">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Hudson Executive Capital LP</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.62%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">Buy</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 16.88%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">2/13/2018</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15.08%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">25,000</div>
</td>
<td style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px double; WIDTH: 18.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px double; BORDER-LEFT: #000000 1px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; COLOR: #000000; TEXT-ALIGN: center; LINE-HEIGHT: 12.55pt">$15.68</div>
</td>
</tr>
</table>

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</DOCUMENT>
</SEC-DOCUMENT>
