<SEC-DOCUMENT>0000932440-13-000228.txt : 20131016
<SEC-HEADER>0000932440-13-000228.hdr.sgml : 20131016
<ACCEPTANCE-DATETIME>20131016121858
ACCESSION NUMBER:		0000932440-13-000228
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20131016
DATE AS OF CHANGE:		20131016
GROUP MEMBERS:		RIDGEBACK CAPITAL INVESTMENTS LTD.
GROUP MEMBERS:		RIDGEBACK CAPITAL MANAGEMENT LP

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARROWHEAD RESEARCH CORP
		CENTRAL INDEX KEY:			0000879407
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
		IRS NUMBER:				460408024
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-48710
		FILM NUMBER:		131153655

	BUSINESS ADDRESS:	
		STREET 1:		225 SOUTH LAKE AVENUE
		STREET 2:		SUITE 1050
		CITY:			PASADENA
		STATE:			CA
		ZIP:			91101
		BUSINESS PHONE:		626-304-3400

	MAIL ADDRESS:	
		STREET 1:		225 SOUTH LAKE AVENUE
		STREET 2:		SUITE 1050
		CITY:			PASADENA
		STATE:			CA
		ZIP:			91101

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTERACTIVE GROUP INC
		DATE OF NAME CHANGE:	20020509

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTERACTIVE INC
		DATE OF NAME CHANGE:	19940224

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ridgeback Capital Investments L.P.
		CENTRAL INDEX KEY:			0001423994
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		75 NINTH AVENUE
		STREET 2:		5TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10011
		BUSINESS PHONE:		212-624-2567

	MAIL ADDRESS:	
		STREET 1:		75 NINTH AVENUE
		STREET 2:		5TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10011
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>sc13g_1961769.htm
<DESCRIPTION>SCHEDULE 13G
<TEXT>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt; FONT-WEIGHT: bold">(Amendment No. __)</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-WEIGHT: bold">UNDER THE SECURITIES EXCHANGE ACT OF 1934</font><font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">1</font></font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(Date of Event Which Requires Filing of this Statement)</font></div>

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<div style="TEXT-ALIGN: left; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;Check the appropriate box to designate the rule pursuant to which this Schedule is filed:</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 108pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline;" face="Wingdings">x</font>&#160;&#160;Rule 13d-1(c)</font></div>

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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">1&#160;&#160;&#160;</font>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-INDENT: -36pt; DISPLAY: block; MARGIN-LEFT: 81pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Ridgeback Capital Investments L.P.<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;00-0000000</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SOLE VOTING POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160;</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">-0-</font></div>
</td>
</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">6.</font></div>
</td>
<td colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SHARED VOTING POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160;</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">7.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SOLE DISPOSITIVE POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160;</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">-0-</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">8.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SHARED DISPOSITIVE POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160;</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: black">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">9.</font></div>
</td>
<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: black">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">10.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CERTAIN SHARES**</font></div>
</td>
<td align="left" colspan="2" valign="top" width="17%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: black">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">11.</font></div>
</td>
<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">5.0%</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: black">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">12.</font></div>
</td>
<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">TYPE OF REPORTING PERSON**</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">OO</font></div>
</td>
</tr><tr>
<td valign="top" width="5%" style="TEXT-ALIGN: left; BORDER-LEFT: medium none; BORDER-RIGHT: black"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td colspan="5" valign="top" width="5%" style="TEXT-ALIGN: center; BORDER-LEFT: medium none; BORDER-RIGHT: medium none">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">** SEE INSTRUCTIONS BEFORE FILLING OUT</font></div>
</td>
</tr></table>
</div>

<br>
<div id="PGBRK" style="TEXT-INDENT: 0pt; WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<div id="FTR">
<div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>
</div>

<div id="PN" style="PAGE-BREAK-AFTER: always; WIDTH: 100%">
<div style="TEXT-ALIGN: center; WIDTH: 100%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>

<div style="TEXT-ALIGN: center; WIDTH: 100%">
<hr style="COLOR: black" noshade size="2">
</div>
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<div id="HDR">
<div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>

<div style="WIDTH: 100%" align="left">
<div style="TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block"><br>
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<div>
<table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr>
<td align="left" valign="top" width="27%" style="BORDER-BOTTOM: black 2px solid; BORDER-TOP: #ffffff 0.5pt solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CUSIP NO. 042797209</font></div>
</td>
<td valign="top" width="27%" style="BORDER-BOTTOM: black 2px solid; BORDER-TOP: #ffffff 0.5pt solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">13G</font></div>
</td>
<td align="right" valign="top" width="27%" style="BORDER-BOTTOM: black 2px solid; BORDER-TOP: #ffffff 0.5pt solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Page&#160;3 of 10</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

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

<div align="left">
<table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-TOP: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">1.</font></div>
</td>
<td colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-TOP: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">NAMES OF REPORTING PERSONS</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt">&#160;</div>

<div style="TEXT-INDENT: -36pt; DISPLAY: block; MARGIN-LEFT: 81pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Ridgeback Capital Investments Ltd.<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;00-0000000</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>
</td>
</tr><tr>
<td align="left" rowspan="2" valign="top" width="5%" style="BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">2.</font></div>
</td>
<td colspan="3" rowspan="2" valign="top" width="5%" style="TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**</font></div>
</td>
<td align="left" valign="top" width="6%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(a)</font></div>
</td>
<td align="left" valign="top" width="8%" style="BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(b)</font></div>
</td>
<td align="left" valign="top" width="8%" style="BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-TOP: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">3.</font></div>
</td>
<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-TOP: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SEC USE ONLY</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>
</td>
</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">4.</font></div>
</td>
<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CITIZENSHIP OR PLACE OF ORGANIZATION</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Cayman Islands</font></div>
</td>
</tr><tr>
<td colspan="2" rowspan="4" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">NUMBER OF</font></div>

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

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

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">BENEFICIALLY</font></div>

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">OWNED BY</font></div>

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">EACH</font><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><br>
</font></div>

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">REPORTING</font></div>

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">PERSON WITH<br>
</font></div>
</td>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">5.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="52%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SOLE VOTING POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">-0-</font></div>
</td>
</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">6.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SHARED VOTING POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
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</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">7.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SOLE DISPOSITIVE POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">-0-</font></div>
</td>
</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">8.</font></div>
</td>
<td colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: black 1px solid; TEXT-ALIGN: left; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SHARED DISPOSITIVE POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
</td>
</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">9.</font></div>
</td>
<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
</td>
</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">10.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CERTAIN SHARES**</font></div>
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<td align="left" colspan="2" valign="top" width="14%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">11.</font></div>
</td>
<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">5.0%</font></div>
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</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">12.</font></div>
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<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">TYPE OF REPORTING PERSON**</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">OO</font></div>
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</tr><tr>
<td valign="top" width="5%" style="TEXT-ALIGN: left; BORDER-LEFT: medium none"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td colspan="5" valign="top" width="5%" style="TEXT-ALIGN: center; BORDER-RIGHT: medium none">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">** SEE INSTRUCTIONS BEFORE FILLING OUT</font></div>
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<div id="PN" style="PAGE-BREAK-AFTER: always; WIDTH: 100%">
<div style="TEXT-ALIGN: center; WIDTH: 100%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>

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<table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
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<td align="left" valign="top" width="27%" style="BORDER-BOTTOM: black 2px solid; BORDER-TOP: #ffffff 0.5pt solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CUSIP NO. 042797209</font></div>
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<td valign="top" width="27%" style="BORDER-BOTTOM: black 2px solid; BORDER-TOP: #ffffff 0.5pt solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">13G</font></div>
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<td align="right" valign="top" width="27%" style="BORDER-BOTTOM: black 2px solid; BORDER-TOP: #ffffff 0.5pt solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Page&#160;4 of 10</font></div>
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<div align="left">
<table cellpadding="0" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-TOP: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">1.</font></div>
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<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-TOP: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">NAMES OF REPORTING PERSONS</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Ridgeback Capital Management LP&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;42-1684320</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>
</td>
</tr><tr>
<td align="left" rowspan="2" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">2.</font></div>
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<td colspan="3" rowspan="2" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**</font></div>
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<td align="left" valign="top" width="4%" style="PADDING-BOTTOM: 1px">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(a)</font></div>
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<td align="left" valign="top" width="10%" style="PADDING-BOTTOM: 1px; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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</tr><tr>
<td valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(b)</font></div>
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<td valign="top" width="10%" style="BORDER-BOTTOM: dimgray 1px solid; TEXT-ALIGN: left; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">3.</font></div>
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<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SEC USE ONLY</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">4.</font></div>
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<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CITIZENSHIP OR PLACE OF ORGANIZATION</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Delaware</font></div>
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</tr><tr>
<td colspan="2" rowspan="4" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">NUMBER OF</font></div>

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

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

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">BENEFICIALLY</font></div>

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">OWNED BY</font></div>

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">EACH</font></div>

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">REPORTING</font></div>

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

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">PERSON WITH</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
</td>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">5.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="52%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SOLE VOTING POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">-0-</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">6.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SHARED VOTING POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">7.</font></div>
</td>
<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SOLE DISPOSITIVE POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">-0-</font></div>
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<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">8.</font></div>
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<td align="left" colspan="3" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">SHARED DISPOSITIVE POWER</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
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<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">9.</font></div>
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<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">1,817,717</font></div>
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<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">10.</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CERTAIN SHARES**</font></div>
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<td align="left" colspan="2" valign="top" width="15%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">11.</font></div>
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<td align="left" colspan="5" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid; BORDER-RIGHT: dimgray 1px solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">5.0%</font></div>
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<td align="left" valign="top" width="5%" style="BORDER-BOTTOM: dimgray 1px solid; BORDER-LEFT: dimgray 1px solid">
<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">12.</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">TYPE OF REPORTING PERSON**</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">OO</font></div>
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<td valign="top" width="5%" style="TEXT-ALIGN: left; BORDER-LEFT: medium none"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td colspan="5" valign="top" width="5%" style="TEXT-ALIGN: center; BORDER-LEFT: medium none; BORDER-RIGHT: medium none">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">** SEE INSTRUCTIONS BEFORE FILLING OUT</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CUSIP NO. 042797209</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">13G</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Page&#160;5 of 10</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 3.6pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 1(a).</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 36pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Name of Issuer.</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block"><br>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Arrowhead Research Corporation (the &#8220;Company&#8221;).</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 3.6pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 1(b).</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 36pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Address of Issuer&#8217;s Principal Executive Offices.</font></div>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The Company&#8217;s principal executive offices are located at 225 S. Lake Avenue, Suite 1050, Pasadena, California 91101.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Items 2(a).</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 36pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Name of Person Filing.</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block"><br>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">This statement is filed on behalf of the following persons with respect to shares of common stock of the Company acquired by them (the &#8220;Shares&#8221;):</font></div>

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

<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(i)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Ridgeback Capital Investments L.P., Cayman exempted limited partnership (&#8220;RCILP&#8221;), with respect to Shares beneficially owned by it;</font></div>

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

<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(ii)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Ridgeback Capital Investments Ltd., a Cayman limited company (&#8220;RCI&#8221;), with respect to Shares beneficially owned by it; and</font></div>

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

<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(iii)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Ridgeback Capital Management LP, a Delaware limited partnership (&#8220;RCM&#8221;), with respect to Shares beneficially owned by it.</font></div>

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

<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The foregoing persons are hereinafter referred to collectively as the &#8220;Reporting Persons.&#8221;&#160;&#160;Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party.</font></div>

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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 2(b).</font></div>
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<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Address of Principal Business Office or, if None, Residence.</font></div>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The address of the principal business office of each of the Reporting Persons is 75 Ninth Avenue, 5<font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">th</font> Floor, New York, NY 10011.</font></div>

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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 2(c).</font></div>
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<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Citizenship.</font></div>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">RCILP is a Cayman Island exempted limited partnership.&#160;&#160;RCI is a Cayman Island limited company.&#160;&#160;RCM is a Delaware limited partnership.</font></div>

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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 2(d).</font></div>
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<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Title of Class of Securities.</font></div>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Common stock, $0.001 par value per share.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CUSIP NO. 042797209</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">13G</font></div>
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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 2(e).</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 3.</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block"><br>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">If this statement is filed pursuant to Rules 13d-1(b) or 13d- 2(b) or (c), check whether the person filing is&#160;a:</font></div>

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<div align="left">
<table cellpadding="2" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
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<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(a)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Broker or dealer registered under Section 15 of the Act,</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(b)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Bank as defined in Section 3(a)(6) of the Act,</font></div>
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<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(c)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Insurance Company as defined in Section 3(a)(19) of the Act,</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(d)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Investment Company registered under Section 8 of the Investment Company Act of 1940,</font></div>
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<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(e)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Investment Adviser in accordance with Rule 13d-1 (b)(1)(ii)(E),</font></div>
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<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(f)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
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<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Employee Benefit Plan or Endowment Fund in accordance with 13d-1 (b)(1)(ii)(F),</font></div>
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<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(g)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Parent Holding Company or control person in accordance with Rule 13d-1 (b)(1)(ii)(G),</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(h)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Savings Association as defined in Section 3(b) of the Federal Deposit Insurance Act,</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(i)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Church Plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940,</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(j)</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J),</font></div>
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<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(k)</font></div>
</td>
<td valign="top" width="4%" style="TEXT-ALIGN: center">
<div style="TEXT-ALIGN: center; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: wingdings; FONT-SIZE: 10pt">o</font></div>
</td>
<td align="left" valign="top" width="92%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Group, in accordance with Rule 13d-1(b)(1)(ii)(K).&#160;&#160;If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please specify the type of institution:&#160;&#160;___________________.</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>
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<div>
<table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 4.</font></div>
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<td width="1808">
<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Ownership.</font></div>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left">
<div style="TEXT-INDENT: 27pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The percentages used herein are calculated based upon 36,307,615 shares outstanding as of October 16, 2013 based upon information reported in the Company&#8217;s Current Report on Form 8-K filed with the SEC on October 10, 2013.&#160;&#160;As of the close of business on October 16, 2013, the Reporting Persons beneficially owned shares of the Company&#8217;s common stock in the amounts and percentages listed below</font>:</font></div>
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<table cellpadding="2" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
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<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">A.</font></div>
</td>
<td align="left" colspan="2" valign="top" width="96%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Ridgeback Capital Investments L.P.</font></div>
</td>
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<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(a)</font></div>
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<td align="left" colspan="2" valign="top" width="96%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Amount beneficially owned:&#160;&#160;1,817,717</font></div>
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<div>&#160;</div>

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<td align="left" valign="top" width="27%" style="BORDER-BOTTOM: black 2px solid; BORDER-TOP: #ffffff 0.5pt solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">CUSIP NO. 042797209</font></div>
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<td valign="top" width="27%" style="BORDER-BOTTOM: black 2px solid; BORDER-TOP: #ffffff 0.5pt solid">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">13G</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Page&#160;7 of 10</font></div>
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<table cellpadding="2" cellspacing="0" width="100%" style="FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr>
<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(b)</font></div>
</td>
<td align="left" colspan="2" valign="top" width="96%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Percent of class: 5.0%</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(c)</font></div>
</td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(i)</font></div>
</td>
<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Sole power to vote or direct the vote: -0-</font></div>
</td>
</tr><tr>
<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(ii)</font></div>
</td>
<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Shared power to vote or direct the vote:&#160;&#160;1,817,717</font></div>
</td>
</tr><tr>
<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(iii)</font></div>
</td>
<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Sole power to dispose or direct the disposition:&#160;&#160;-0-</font></div>
</td>
</tr><tr>
<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(iv)</font></div>
</td>
<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Shared power to dispose or direct the disposition:&#160;&#160;1,817,717</font></div>
</td>
</tr><tr>
<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="top" width="3%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="top" width="93%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
</tr><tr>
<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">B.</font></div>
</td>
<td align="left" colspan="2" valign="top" width="96%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Ridgeback Capital Investments Ltd.</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(a)</font></div>
</td>
<td align="left" colspan="2" valign="top" width="96%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Amount beneficially owned:&#160;&#160;1,817,717</font></div>
</td>
</tr><tr>
<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(b)</font></div>
</td>
<td align="left" colspan="2" valign="top" width="96%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Percent of class: 5.0%</font></div>
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<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(c)</font></div>
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<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(i)</font></div>
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<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Sole power to vote or direct the vote: -0-</font></div>
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<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(ii)</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Shared power to vote or direct the vote:&#160;&#160;1,817,717</font></div>
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<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(iii)</font></div>
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<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Sole power to dispose or direct the disposition:&#160;&#160;-0-</font></div>
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<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(iv)</font></div>
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<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Shared power to dispose or direct the disposition:&#160;&#160;1,817,717</font></div>
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<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td colspan="2" valign="top" width="96%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
</tr><tr>
<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">C.</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Ridgeback Capital Management LP</font></div>
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<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(a)</font></div>
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<td align="left" colspan="2" valign="top" width="96%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Amount beneficially owned:&#160;&#160;1,817,717</font></div>
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<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(b)</font></div>
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<td align="left" colspan="2" valign="top" width="96%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Percent of class: 5.0%</font></div>
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<td align="left" valign="top" width="4%" style="PADDING-LEFT: 0pt; MARGIN-LEFT: 9pt">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 9pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(c)</font></div>
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<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(i)</font></div>
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<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Sole power to vote or direct the vote: -0-</font></div>
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<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(ii)</font></div>
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<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Shared power to vote or direct the vote:&#160;&#160;1,817,717</font></div>
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<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(iii)</font></div>
</td>
<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Sole power to dispose or direct the disposition:&#160;&#160;-0-</font></div>
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</tr><tr>
<td valign="top" width="4%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="3%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(iv)</font></div>
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<td align="left" valign="top" width="93%">
<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Shared power to dispose or direct the disposition:&#160;&#160;1,817,717</font></div>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">RCM and RCI do not own any Shares directly.&#160;&#160;RCI is the general partner of RCILP.&#160;&#160;Pursuant to an investment management agreement, RCM maintains investment and voting power with respect to the securities held or controlled by RCI.&#160;&#160;Wayne Holman, an individual, controls RCM.&#160;&#160;By reason of the provisions of Rule 13d-3 of the Securities Exchange Act of 1934, as amended, RCM and RCI may be deemed to own beneficially all of the Shares (constituting approximately 5.0% of the shares outstanding).&#160;&#160;Each of RCM and RCI disclaim beneficial ownership of any of the securities covered by this statement, except to the extent of any pecuniary interest therein.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">13G</font></div>
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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 5.</font></div>
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<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Ownership of Five Percent or Less of a Class.</font></div>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.<font id="TAB1" style="MARGIN-LEFT: 12pt"></font><font style="DISPLAY: inline;" face="Wingdings">&#168;</font></font></div>

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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">To the knowledge of the Reporting Persons, no other person has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, a number of the Shares which represents more than five percent of the number of outstanding shares of the Shares.</font></div>

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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Each of the Reporting Persons hereby makes the following certification:</font></div>

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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160;/s/ Bud Holman</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160;/s/ Bud Holman</font></div>
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<div style="TEXT-INDENT: 36pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The undersigned hereby agree that statements on Schedules 13G and/or 13D and Forms 3, 4 and 5 with respect to the shares of common stock of Arrowhead Research Corporation and any amendments thereto signed by each of the undersigned shall be filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended.&#160;&#160;The undersigned hereby further agree that this Joint Filing Agreement may be included as an exhibit to such statements or amendments.&#160;&#160;This Joint Filing Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.</font></div>

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