<SEC-DOCUMENT>0001140361-18-009848.txt : 20180223
<SEC-HEADER>0001140361-18-009848.hdr.sgml : 20180223
<ACCEPTANCE-DATETIME>20180223161823
ACCESSION NUMBER:		0001140361-18-009848
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180223
DATE AS OF CHANGE:		20180223
GROUP MEMBERS:		BIOGROWTH PARTNERS, L.P.
GROUP MEMBERS:		THOMAS B. NEFF FAMILY PARTNERSHIP

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIBROGEN INC
		CENTRAL INDEX KEY:			0000921299
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88653
		FILM NUMBER:		18636756

	BUSINESS ADDRESS:	
		STREET 1:		409 ILLINOIS STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94158
		BUSINESS PHONE:		415-978-1200

	MAIL ADDRESS:	
		STREET 1:		409 ILLINOIS STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94158

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Neff Thomas B
		CENTRAL INDEX KEY:			0001623238

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	MAIL ADDRESS:	
		STREET 1:		C/O FIBROGEN, INC.
		STREET 2:		409 ILLINOIS ST.
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94158
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>formsc13ga.htm
<DESCRIPTION>SC 13G/A
<TEXT>
<html>
<head>
<title>SC 13G/A</title>
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<p style="BORDER-BOTTOM: #000000 1px solid; LINE-HEIGHT: 1pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt">&#160;</p>

<p style="BORDER-BOTTOM: #000000 1px solid; LINE-HEIGHT: 3pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 2pt">&#160;</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 12pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-WEIGHT: bold">SECURITIES AND EXCHANGE COMMISSION </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-WEIGHT: bold">WASHINGTON, DC 20549 </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">___________________</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 18pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 18pt; FONT-WEIGHT: bold">SCHEDULE 13G </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 12pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-WEIGHT: bold">U<small>NDER</small><small>THE</small> S<small>ECURITIES</small> E<small>XCHANGE</small> A<small>CT</small><small>OF</small> 1934 </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-WEIGHT: bold">(Amendment No.&#160;3)* </p>

<div style="TEXT-ALIGN: center">___________________</div>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 18pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 22pt; FONT-WEIGHT: bold">FibroGen, Inc. </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-WEIGHT: bold">(Name of Issuer) </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 24pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Common Stock </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 8pt; FONT-WEIGHT: bold">(Title of Class&#160;of Securities) </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 24pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-WEIGHT: bold">31572Q808 </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 8pt; FONT-WEIGHT: bold">(CUSIP Number) </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 24pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-WEIGHT: bold">December&#160;31, 2017 </p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 8pt; FONT-WEIGHT: bold">(Date of Event Which Requires Filing of this Statement) </p>

<div style="TEXT-ALIGN: center">___________________</div>

<p style="MARGIN-TOP: 18pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Check the appropriate box to designate the rule pursuant to which this Schedule is filed: </p>

<p style="MARGIN-TOP: 12pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 8%; FONT-SIZE: 10pt">&#9744; Rule <font style="WHITE-SPACE: nowrap">13d-1(b)</font></p>

<p style="MARGIN-TOP: 12pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 8%; FONT-SIZE: 10pt">&#9744; Rule <font style="WHITE-SPACE: nowrap">13d-1(c)</font></p>

<p style="MARGIN-TOP: 12pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 8%; FONT-SIZE: 10pt">&#9746; Rule <font style="WHITE-SPACE: nowrap">13d-1(d)</font></p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z81c070d2a8e749828ee2ee0993c228ba" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%" valign="top" align="left">*</td>
<td valign="top" align="left">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. </td>
</tr>
</table>

<p style="MARGIN-TOP: 12pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">The information required in the remainder of this cover page shall not be deemed to be &#8220;filed&#8221; for the purpose of Section&#160;18 of the Securities Exchange Act of 1934 (&#8220;Act&#8221;) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, <i>see</i> the <i>Notes</i>). </p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="BORDER-BOTTOM: #000000 1px solid; LINE-HEIGHT: 1pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt">&#160;</p>

<p style="BORDER-BOTTOM: #000000 1px solid; LINE-HEIGHT: 3pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 2pt">&#160;</p>

<p style="PAGE-BREAK-BEFORE: always"></p>

<hr style="WIDTH: 100%; COLOR: #999999" align="center" size="3">
<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z5b1864f0e83f4f5192b4300e3d78517a" border="0" cellspacing="0" cellpadding="0">
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<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top"><b>CUSIP&#160;No. 31572Q808</b></td>
<td valign="bottom">&#160;</td>
<td valign="bottom"></td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z8b6c9c5892724bc2a6420be622e309c3" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 4%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
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<td></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 88%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt; BORDER-TOP: #000000 1px solid" valign="top">&#160;&#160;1.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Names of Reporting Persons</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">Thomas B. Neff</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt" valign="top">&#160;&#160;2.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Check the Appropriate Box if a Member of a Group (see instructions)</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(a)&#160;&#160;&#9744;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;(b)&#160;&#160;&#9744;</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">&#160;</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">&#160;&#160;3.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">SEC USE ONLY</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">&#160;</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">&#160;&#160;4.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Citizenship or Place of Organization</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">United States</p>
</td>
</tr>
</table>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z4061a3144358484dadca778a383fcf71" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 2%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 3%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 87%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt" valign="middle" rowspan="4" colspan="3" align="center">
<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Number&#160;of</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shares</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">&#160;Beneficially&#160;</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Owned&#160;by</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Each</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Reporting</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 10pt">&#160;Person&#160;With:&#160;</p>
</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">5.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Sole Voting Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">5,288,014 shares<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">(1)</sup></p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">6.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shared Voting Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">Not applicable.</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">7.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Sole Dispositive Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">5,288,014 shares<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">(1)</sup></p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="FONT-SIZE: 10pt" valign="top">8.</td>
<td style="BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shared Dispositive Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">Not applicable.</p>
</td>
</tr>
</table>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="za9217c378ba84a86b5aeeeee0687af11" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 4%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 88%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt; BORDER-TOP: #000000 1px solid" valign="top">&#160;&#160;9.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Aggregate Amount Beneficially Owned by Each Reporting Person</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">5,288,014 shares<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">(1)</sup></p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">10.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Check if the Aggregate Amount in Row (9)&#160;Excludes Certain Shares (see instructions)&#160;&#160;&#160;&#160;&#9746;</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">19,500 shares<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">(2)</sup></p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">11.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Percent of Class&#160;Represented by Amount in Row 9</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">6.3%<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">(3)</sup></p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">12.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Type of Reporting Person (see instructions)</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">IN</p>
</td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z39171404baf14957ba316f42a07a03c4" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%" valign="top" align="left">(1)</td>
<td valign="top" align="left">Includes 126,678 shares of Common Stock held by the Thomas B. Neff Family Partnership, 60,946 shares held by BioGrowth Partners, L.P., and 2,032,654 shares of Common Stock issuable pursuant to stock options exercisable within 60 days of December&#160;31, 2017 and 8,987 shares of common stock issuable pursuant to restricted stock units within 60 days of December&#160;31, 2017. </td>
</tr>
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<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%" valign="top" align="left">(2)</td>
<td valign="top" align="left">Shares held by Reporting Person&#8217;s spouse over which the Reporting Person has no voting or dispositive power. </td>
</tr>
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<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="zd262fab6ebc94fe8806ac8ae07769170" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%" valign="top" align="left">(3)</td>
<td valign="top" align="left">The percentage calculation is based on 82,197,479 shares of Common Stock outstanding on November&#160;30, 2017 as reported in the Issuer&#8217;s quarterly report on Form <font style="WHITE-SPACE: nowrap">10-Q/A</font> as filed with the SEC on December&#160;14, 2017, plus the Reporting Person&#8217;s options exercisable within 60 days of December&#160;31, 2017 and restricted stock units issuable within 60 days of December&#160;31, 2017. </td>
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<p style="PAGE-BREAK-BEFORE: always"></p>

<hr style="WIDTH: 100%; COLOR: #999999" align="center" size="3">
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<td valign="top"><b>CUSIP No. 31572Q808</b></td>
<td valign="bottom">&#160;</td>
<td valign="bottom"></td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="zb18aefbdeb1743ea9032cf56610698a2" border="0" cellspacing="0" cellpadding="0">
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<td style="WIDTH: 4%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
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<td></td>
<td style="WIDTH: 1%" valign="bottom"></td>
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<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt; BORDER-TOP: #000000 1px solid" valign="top">&#160;&#160;1.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Names of Reporting Persons</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">Thomas B. Neff Family Partnership</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt" valign="top">&#160;&#160;2.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Check the Appropriate Box if a Member of a Group (see instructions)</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(a)&#160;&#160;&#9744;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;(b)&#160;&#160;&#9744;</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">&#160;</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">&#160;&#160;3.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">SEC USE ONLY</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">&#160;</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">&#160;&#160;4.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Citizenship or Place of Organization</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">USA</p>
</td>
</tr>
</table>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z9ff0d1301f1e487aaab8bbee699ed5ad" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 2%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 3%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 87%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt" valign="middle" rowspan="4" colspan="3" align="center">
<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Number&#160;of</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shares</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">&#160;Beneficially&#160;</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Owned&#160;by</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Each</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Reporting</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 10pt">&#160;Person&#160;With:&#160;</p>
</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">5.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Sole Voting Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">126,678 shares</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">6.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shared Voting Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">Not applicable.</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">7.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Sole Dispositive Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">126,678 shares</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="FONT-SIZE: 10pt" valign="top">8.</td>
<td style="BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shared Dispositive Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">Not applicable.</p>
</td>
</tr>
</table>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z7194dc33fa3b468d951c4990e32f91f8" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 4%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 88%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt; BORDER-TOP: #000000 1px solid" valign="top">&#160;&#160;9.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Aggregate Amount Beneficially Owned by Each Reporting Person</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">126,678 shares</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">10.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Check if the Aggregate Amount in Row (9)&#160;Excludes Certain Shares (see instructions) &#160;&#160;&#160;&#160;&#9744;</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">&#160;</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">11.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Percent of Class&#160;Represented by Amount in Row 9</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">0.2%<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">(1)</sup></p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">12.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Type of Reporting Person (see instructions)</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">OO</p>
</td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="zffc6555dae79460689047ff26d11c20c" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%" valign="top" align="left">(1)</td>
<td valign="top" align="left">The percentage calculation is based on 82,197,479 shares of Common Stock outstanding on November&#160;30, 2017 as reported in the Issuer&#8217;s quarterly report on Form <font style="WHITE-SPACE: nowrap">10-Q/A</font> as filed with the SEC on December&#160;14, 2017. </td>
</tr>
</table>

<p style="PAGE-BREAK-BEFORE: always"></p>

<hr style="WIDTH: 100%; COLOR: #999999" align="center" size="3">
<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z50749f9a7ff44db4bb3ee404f6617b01" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 50%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 49%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top"><b>CUSIP No. 31572Q808</b></td>
<td valign="bottom">&#160;</td>
<td valign="bottom"></td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="zdcce60f61477428d839c645cf29bd486" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 4%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 88%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt; BORDER-TOP: #000000 1px solid" valign="top">&#160;&#160;1.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Names of Reporting Persons</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">BioGrowth Partners, L.P.</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt" valign="top">&#160;&#160;2.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Check the Appropriate Box if a Member of a Group (see instructions)</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(a)&#160;&#160;&#9744;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;(b)&#160;&#160;&#9744;</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">&#160;</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">&#160;&#160;3.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">SEC USE ONLY</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">&#160;</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">&#160;&#160;4.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Citizenship or Place of Organization</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">USA</p>
</td>
</tr>
</table>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z09f45043791b4bb6b4e697cbe8430c8f" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 2%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 3%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 87%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt" valign="middle" rowspan="4" colspan="3" align="center">
<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Number&#160;of</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shares</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">&#160;Beneficially&#160;</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Owned&#160;by</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Each</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Reporting</p>

<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 10pt">&#160;Person&#160;With:&#160;</p>
</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">5.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Sole Voting Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">60,946 shares</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">6.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shared Voting Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">Not applicable.</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; FONT-SIZE: 10pt" valign="top">7.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Sole Dispositive Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">60,946 shares</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="FONT-SIZE: 10pt" valign="top">8.</td>
<td style="BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;&#160;</td>
<td style="PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Shared Dispositive Power</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">Not applicable.</p>
</td>
</tr>
</table>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z468abdae963c4c8dbb9470013427ee5d" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 4%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 5%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 88%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt; BORDER-TOP: #000000 1px solid" valign="top">&#160;&#160;9.&#160;&#160;&#160;&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Aggregate Amount Beneficially Owned by Each Reporting Person</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">60,946 shares</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">10.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Check if the Aggregate Amount in Row (9)&#160;Excludes Certain Shares (see instructions) &#160;&#160;&#160;&#160;&#9744;</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">&#160;</p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">11.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Percent of Class&#160;Represented by Amount in Row 9</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">0.1%<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">(1)</sup></p>
</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 12pt">
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid; PADDING-LEFT: 8pt; FONT-SIZE: 10pt" valign="top">12.</td>
<td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 1px solid" valign="bottom">&#160;</td>
<td style="BORDER-BOTTOM: #000000 1px solid; PADDING-RIGHT: 2pt; BORDER-RIGHT: #000000 1px solid" valign="top" colspan="5">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Type of Reporting Person (see instructions)</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; FONT-SIZE: 12pt">OO</p>
</td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z9104c4da900a4167bbf753f9836bd8a3" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%" valign="top" align="left">(1)</td>
<td valign="top" align="left">The percentage calculation is based on 82,197,479 shares of Common Stock outstanding on November&#160;30, 2017 as reported in the Issuer&#8217;s quarterly report on Form <font style="WHITE-SPACE: nowrap">10-Q/A</font> as filed with the SEC on December&#160;14, 2017. </td>
</tr>
</table>

<p style="PAGE-BREAK-BEFORE: always"></p>

<hr style="WIDTH: 100%; COLOR: #999999" align="center" size="3">
<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z3146686c371d4a79b0a9e993b5c369f1" border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td style="WIDTH: 9%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 45%"></td>
<td style="WIDTH: 1%" valign="bottom"></td>
<td style="WIDTH: 44%"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="FONT-SIZE: 11pt" valign="bottom"><b>Item&#160;1(a).</b></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Name of Issuer: FibroGen, Inc.</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="FONT-SIZE: 11pt" valign="bottom"><b>Item&#160;1(b).</b></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Address of Issuer&#8217;s Principal Executive Offices: 409 Illinois St., San Francisco, CA 94158</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="FONT-SIZE: 11pt" valign="top"><b>Item&#160;2(a).</b></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Name of Person Filing:</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Thomas B. Neff</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Thomas B. Neff Family Partnership (&#8220;Family Partnership&#8221;)</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">BioGrowth Partners, L.P. (&#8220;BioGrowth Partners&#8221;)</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 24px"></td>
<td style="HEIGHT: 24px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="FONT-SIZE: 11pt" valign="top"><b>Item&#160;2(b).</b></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Address of Principal Business Office or, if none, Residence: The address and principal business office of the Reporting Person is:</p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">c/o FibroGen, Inc.</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">409 Illinois St.</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">San Francisco, CA 94158</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 24px"></td>
<td style="HEIGHT: 24px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="FONT-SIZE: 11pt" valign="top"><b>Item&#160;2(c).</b></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Citizenship:</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="2"></td>
<td style="HEIGHT: 8px" colspan="2"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top"></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Thomas B. Neff</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Thomas B. Neff Family Partnership</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">BioGrowth Partners</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">US Citizen</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">California</p>

<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 1pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Delaware</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 24px"></td>
<td style="HEIGHT: 24px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="FONT-SIZE: 11pt" valign="top"><b>Item&#160;2(d).</b></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">Title of Class&#160;of Securities: Common Stock</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="FONT-SIZE: 11pt" valign="top"><b>Item&#160;2(e).</b></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -1em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 1em; FONT-SIZE: 10pt">CUSIP Number: 31572Q808</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td style="FONT-SIZE: 11pt" valign="top"><b>Item&#160;3.</b></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3"><b>If this statement is filed pursuant to <font style="WHITE-SPACE: nowrap">&#167;&#167;240.13d-1(b),</font> or <font style="WHITE-SPACE: nowrap">240.13d-2(b)</font> or (c), check whether the person filing is a:</b></td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(a)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;Broker or dealer registered under Section&#160;15 of the Act (15 U.S.C. 78o);</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(b)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(c)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;Insurance company as defined in section 3(a)19) of the Act (15 U.S.C. 78c);</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(d)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. <font style="WHITE-SPACE: nowrap">80a-8);</font></p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(e)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;An investment adviser in accordance with <font style="WHITE-SPACE: nowrap">&#167;240.13d-1(b)(1)(ii)(E);</font></p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(f)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;An employee benefit plan or endowment fund in accordance with <font style="WHITE-SPACE: nowrap">&#167;240.13d-1(b)(1)(ii)(F);</font></p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(g)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;A parent holding company or control person in accordance with <font style="WHITE-SPACE: nowrap">&#167;240.13d-1(b)(1)(ii)(G);</font></p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(h)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;A savings associations as defined in Section&#160;3(b) of the Federal Deposit Insurance Act (12&#160;U.S.C. 1813);</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(i)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. <font style="WHITE-SPACE: nowrap">80a-3);</font></p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(j)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;A <font style="WHITE-SPACE: nowrap">non-U.S.</font> institution in accordance with &#167;240.13d&#8211;1(b)(1)(ii)(J);</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: 3em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">(k)</p>
</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">
<p style="MARGIN-TOP: 0pt; TEXT-INDENT: -2em; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 2em; FONT-SIZE: 10pt">&#9744;&#8194;&#8201;&#8201;Group, in accordance with &#167;240.13d&#8211;1(b)(1)(ii)(K).</p>
</td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="4"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="bottom"></td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top" colspan="3">If filing as a <font style="WHITE-SPACE: nowrap">non-U.S.</font> institution in accordance with &#167;240.13d&#8211;1(b)(1)(ii)(J), please specify the type of institution: <u>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</u></td>
</tr>
</table>

<p style="PAGE-BREAK-BEFORE: always"></p>

<hr style="WIDTH: 100%; COLOR: #999999" align="center" size="3">
<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z7e234290810b457884f7edf5e6165917" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 9%" valign="top" align="left"><b>Item&#160;4.</b></td>
<td valign="top" align="left"><b>Ownership </b></td>
</tr>
</table>

<p style="MARGIN-TOP: 6pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Provide the following information regarding the aggregate number and percentage of the class of securities of the Issuer identified in Item 1. </p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="zcf9dfbdebf3d4469baae46f82ef36f81" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%">&#160;</td>
<td style="WIDTH: 6%" valign="top" align="left"><b>(a)</b></td>
<td valign="top" align="left">Amount Beneficially Owned: </td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<div style="TEXT-ALIGN: right">
<table style="WIDTH: 90%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z3b3208c71abc4fa7ab87299eac0b14c2" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 33%"></td>
<td style="WIDTH: 2%" valign="bottom"></td>
<td style="WIDTH: 65%"></td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="2"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">Thomas B. Neff</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">5,288,014 shares<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">1</sup></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">Family Partnership</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">126,678 shares</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">BioGrowth Partners</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">60,946 shares</td>
</tr>
</table>
</div>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z227e371ce2fb43e6a71fb9535ce98d9d" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%">&#160;</td>
<td style="WIDTH: 6%" valign="top" align="left"><b>(b)</b></td>
<td valign="top" align="left">Percent of Class: </td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<div style="TEXT-ALIGN: right">
<table style="WIDTH: 90%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z6174dedf369d41d7998f2baac35da64d" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 33%"></td>
<td style="WIDTH: 2%" valign="bottom"></td>
<td style="WIDTH: 65%"></td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="2"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">Thomas B. Neff</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">6.3%</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">Family Partnership</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">0.2%</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">BioGrowth Partners</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">0.1%</td>
</tr>
</table>
</div>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z81f5aec6694a4d349a30c783eb150aa1" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%">&#160;</td>
<td style="WIDTH: 6%" valign="top" align="left"><b>(c)</b></td>
<td valign="top" align="left">Number of shares as to which the person has: </td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z7cb1c379686d4e21a2d8fd7db432189f" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 10%">&#160;</td>
<td style="WIDTH: 7%" valign="top" align="left"><b>(i)</b></td>
<td valign="top" align="left">Sole power to vote or to direct the vote: </td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<div style="TEXT-ALIGN: right">
<table style="WIDTH: 90%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="za43446b6be8647608e36899c7158b935" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 33%"></td>
<td style="WIDTH: 2%" valign="bottom"></td>
<td style="WIDTH: 65%"></td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="2"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">Thomas B. Neff</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">5,288,014 shares<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">1</sup></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">Family Partnership</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">126,678 shares</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">BioGrowth Partners</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">60,946 shares</td>
</tr>
</table>
</div>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z03d0d0521c2446889b6d1a41b3a98a16" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 10%">&#160;</td>
<td style="WIDTH: 7%" valign="top" align="left"><b>(ii)</b></td>
<td valign="top" align="left">Shared power to vote or to direct the vote: </td>
</tr>
</table>

<p style="MARGIN-TOP: 6pt; TEXT-INDENT: 17%; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Not applicable. </p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z5931c341d3ea4bcda13667430175f9d0" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 10%">&#160;</td>
<td style="WIDTH: 7%" valign="top" align="left"><b>(iii)</b></td>
<td valign="top" align="left">Sole power to dispose or to direct the disposition of: </td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<div style="TEXT-ALIGN: right">
<table style="WIDTH: 90%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z0751d90c48864ba69a42f6ecc1495004" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 33%"></td>
<td style="WIDTH: 2%" valign="bottom"></td>
<td style="WIDTH: 65%"></td>
</tr>

<tr style="FONT-SIZE: 1pt">
<td style="HEIGHT: 8px"></td>
<td style="HEIGHT: 8px" colspan="2"></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">Thomas B. Neff</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">5,288,014 shares<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;FONT-SIZE: 85%; VERTICAL-ALIGN: top">1</sup></td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">Family Partnership</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">126,678 shares</td>
</tr>

<tr style="PAGE-BREAK-INSIDE: avoid; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<td valign="top">BioGrowth Partners</td>
<td valign="bottom">&#160;&#160;</td>
<td valign="top">60,946 shares</td>
</tr>
</table>
</div>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 6pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z86b7e199f63e4f60a0b9f621b984cc21" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 10%">&#160;</td>
<td style="WIDTH: 7%" valign="top" align="left"><b>(iv)</b></td>
<td valign="top" align="left">Shared power to dispose or to direct the disposition of: </td>
</tr>
</table>

<p style="MARGIN-TOP: 6pt; TEXT-INDENT: 17%; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Not applicable. </p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z43d80a55631d4d208f1d8a0d92721d20" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 4%" valign="top" align="left">(1)</td>
<td valign="top" align="left">Includes 126,678 shares of Common Stock held by the Thomas B. Neff Family Partnership, 60,946 shares held by BioGrowth Partners, L.P., and 2,032,654 shares of Common Stock issuable pursuant to stock options exercisable within 60 days of December&#160;31, 2017 and 8,987 shares of common stock issuable pursuant to restricted stock units within 60 days of December&#160;31, 2017. </td>
</tr>
</table>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 18pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z61038989ec62475d98e0e873806c6e24" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 9%" valign="top" align="left"><b>Item&#160;5.</b></td>
<td valign="top" align="left"><b>Ownership of 5 Percent or Less of a Class </b></td>
</tr>
</table>

<p style="MARGIN-TOP: 6pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; 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 5&#160;percent of the class of securities, check the following &#9744;. </p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 18pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z2cb5ec28a9134c59ba0a872a693da950" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 9%" valign="top" align="left"><b>Item&#160;6.</b></td>
<td valign="top" align="left"><b>Ownership of More than 5 Percent on Behalf of Another Person </b></td>
</tr>
</table>

<p style="MARGIN-TOP: 6pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Not applicable. </p>

<p style="PAGE-BREAK-BEFORE: always"></p>

<hr style="WIDTH: 100%; COLOR: #999999" align="center" size="3">
<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="z2f34f6c9680346d8bf9f8ff7ede83492" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 9%" valign="top" align="left"><b>Item&#160;7.</b></td>
<td valign="top" align="left"><b>Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person. </b></td>
</tr>
</table>

<p style="MARGIN-TOP: 6pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Not applicable. </p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 18pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="ze65e246bf3cb455dbc364093f91b881d" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 9%" valign="top" align="left"><b>Item&#160;8.</b></td>
<td valign="top" align="left"><b>Identification and Classification of Members of the Group </b></td>
</tr>
</table>

<p style="MARGIN-TOP: 6pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Not applicable. </p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 18pt">&#160;</p>

<table style="WIDTH: 100%; BORDER-COLLAPSE: collapse; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt" id="zd64f3397d4f340d7a2f70351c5d3d468" border="0" cellspacing="0" cellpadding="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td style="WIDTH: 9%" valign="top" align="left"><b>Item&#160;9.</b></td>
<td valign="top" align="left"><b>Notice of Dissolution of a Group </b></td>
</tr>
</table>

<p style="MARGIN-TOP: 6pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Not applicable. </p>

<p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; FONT-SIZE: 18pt">&#160;</p>

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<td style="WIDTH: 9%" valign="top" align="left"><b>Item&#160;10.</b></td>
<td valign="top" align="left"><b>Certification </b></td>
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<p style="MARGIN-TOP: 6pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">Not applicable. </p>

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<p style="TEXT-ALIGN: center; MARGIN-TOP: 0pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-WEIGHT: bold">SIGNATURE </p>

<p style="MARGIN-TOP: 12pt; FONT-FAMILY: Times New Roman; MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt">After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. </p>

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<td style="BORDER-BOTTOM: #000000 1px solid" valign="top" align="center">February 22, 2018</td>
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<td style="BORDER-BOTTOM: #000000 1px solid" valign="top" align="center">/s/ Thomas B. Neff</td>
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<td valign="bottom" align="center">Thomas B. Neff</td>
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<td valign="bottom" align="center">Individually and as Managing General Partner of the Thomas B. Neff Family Partnership and General Partner of BioGrowth Partners, L.P.</td>
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