<SEC-DOCUMENT>0001214659-19-003485.txt : 20190514
<SEC-HEADER>0001214659-19-003485.hdr.sgml : 20190514
<ACCEPTANCE-DATETIME>20190514170314
ACCESSION NUMBER:		0001214659-19-003485
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20190514
DATE AS OF CHANGE:		20190514
GROUP MEMBERS:		MANGROVE PARTNERS
GROUP MEMBERS:		NATHANIEL AUGUST

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CATALYST BIOSCIENCES, INC.
		CENTRAL INDEX KEY:			0001124105
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				562020050
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-82442
		FILM NUMBER:		19823669

	BUSINESS ADDRESS:	
		STREET 1:		611 GATEWAY BLVD., SUITE 710
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		650-871-0761

	MAIL ADDRESS:	
		STREET 1:		611 GATEWAY BLVD., SUITE 710
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TARGACEPT INC
		DATE OF NAME CHANGE:	20000919

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Mangrove Partners Master Fund, Ltd.
		CENTRAL INDEX KEY:			0001569227
		IRS NUMBER:				981083428
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		MAPLES CORP. SVCS, PO BOX 309
		STREET 2:		UGLAND HOUSE, S. CHURCH STREET
		CITY:			GEORGE TOWN
		STATE:			E9
		ZIP:			KY1-1104
		BUSINESS PHONE:		2128979537

	MAIL ADDRESS:	
		STREET 1:		645 MADISON AVE, 14 FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>p514190sc13g.htm
<TEXT>
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<HEAD>
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

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<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE 13G</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Under the Securities Exchange Act of
1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Amendment No. [])*</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR>
    <TD STYLE="width: 100%; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 24pt"><B>Catalyst Biosciences, Inc.</B></FONT></TD></TR>
<TR>
    <TD STYLE="font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">(Name of Issuer)</FONT></TD></TR>
<TR>
    <TD STYLE="font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR>
    <TD STYLE="border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><B>Common Stock, $0.001 par value per Share</B></TD></TR>
<TR>
    <TD STYLE="font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">(Title of Class of Securities)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="width: 37%; text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="width: 27%; border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>14888D208</B></FONT></TD>
    <TD STYLE="width: 36%; text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">(CUSIP Number)</FONT></TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR>
    <TD COLSPAN="3" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR>
    <TD COLSPAN="3" STYLE="border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>May 10, 2019</B></FONT></TD></TR>
<TR>
    <TD COLSPAN="3" STYLE="text-align: center"><FONT STYLE="font-size: 10pt">(Date of Event Which Requires Filing of This Statement)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box to designate the rule pursuant to
which this Schedule is filed:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%">&nbsp;</TD>
    <TD STYLE="width: 8%">&#9744;&nbsp;</TD>
    <TD STYLE="width: 88%"><FONT STYLE="font-size: 10pt">Rule 13d-1(b)</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&#9746;&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Rule 13d-1(c)</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&#9744;</TD>
    <TD><FONT STYLE="font-size: 10pt">Rule 13d-1(d)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">*The remainder of this cover page shall be filled out for a
reporting person'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.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The information required in the remainder of this cover page
shall not be deemed to be &ldquo;filed&rdquo; for the purpose of Section 18 of the Securities Exchange Act of 1934 (&ldquo;Act&rdquo;)
or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however,
see the Notes).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="text-align: center"><FONT STYLE="font-size: 10pt"><B>CUSIP No.&nbsp;&nbsp;14888D208</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-top: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; text-align: center"><FONT STYLE="font-size: 18pt"><B>1</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">NAMES OF REPORTING PERSONS</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Mangrove Partners Master Fund, Ltd</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">98-1083428</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-left: black 1pt solid; border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-size: 18pt"><B>2</B></FONT></TD>
    <TD STYLE="width: 72%; border-left: black 1pt solid; border-bottom: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="width: 18%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 10pt">(a)&#9746;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 10pt">(b)</FONT>&#9744;</P></TD></TR>
<TR STYLE="vertical-align: top; background-color: #DDDDDD">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; text-align: center"><FONT STYLE="font-size: 18pt"><B>3</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC USE ONLY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; text-align: center"><FONT STYLE="font-size: 18pt"><B>4</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CITIZENSHIP OR PLACE OF ORGANIZATION</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Cayman Islands</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD ROWSPAN="4" STYLE="width: 20%; border-left: black 1pt solid; border-bottom: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">NUMBER OF</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARES</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">BENEFICIALLY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">OWNED BY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">EACH REPORTING</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">PERSON WITH:</P></TD>
    <TD STYLE="vertical-align: top; width: 11%; border-left: black 1pt solid; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>5</B></FONT></TD>
    <TD STYLE="vertical-align: top; width: 69%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SOLE VOTING POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">0</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>6</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARED VOTING POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SOLE DISPOSITIVE POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">0</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>8</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARED DISPOSITIVE POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-left: black 1pt solid; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>9</B></FONT></TD>
    <TD STYLE="width: 90%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>10</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
        SHARES (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 34.7pt 0pt 0">&#9744;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>11</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5.0%</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>12</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TYPE OF REPORTING PERSON (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">OO</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;CUSIP No.&nbsp; 14888D208</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-top: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>1</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">NAMES OF REPORTING PERSONS</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Mangrove Partners</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">98-0652572</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-left: black 1pt solid; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>2</B></FONT></TD>
    <TD STYLE="width: 72%; border-left: black 1pt solid; border-bottom: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="width: 18%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 10pt">(a)</FONT>&#9746;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 10pt">(b)</FONT>&#9744;</P></TD></TR>
<TR STYLE="vertical-align: top; background-color: #DDDDDD">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>3</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC USE ONLY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>4</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CITIZENSHIP OR PLACE OF ORGANIZATION</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Cayman Islands</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD ROWSPAN="4" STYLE="width: 20%; border-left: black 1pt solid; border-bottom: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">NUMBER OF</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARES</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">BENEFICIALLY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">OWNED BY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">EACH REPORTING</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">PERSON WITH:</P></TD>
    <TD STYLE="vertical-align: top; width: 11%; border-left: black 1pt solid; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>5</B></FONT></TD>
    <TD STYLE="vertical-align: top; width: 69%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SOLE VOTING POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">0</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>6</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARED VOTING POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SOLE DISPOSITIVE POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">0</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>8</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARED DISPOSITIVE POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-left: black 1pt solid; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>9</B></FONT></TD>
    <TD STYLE="width: 90%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>10</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
        SHARES (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 34.7pt 0pt 0">&#9744;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>11</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5.0%</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>12</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TYPE OF REPORTING PERSON (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">OO</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


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    <DIV STYLE="margin-top: 8pt; margin-bottom: 6pt; border-bottom: Black 2px solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->3<!-- Field: /Sequence --> of 8 pages</TD><TD STYLE="width: 33%">&nbsp;</TD></TR></TABLE></DIV>
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    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>CUSIP No.&nbsp;&nbsp;14888D208</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-top: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>1</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">NAMES OF REPORTING PERSONS</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Nathaniel August</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-left: black 1pt solid; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>2</B></FONT></TD>
    <TD STYLE="width: 72%; border-left: black 1pt solid; border-bottom: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD STYLE="width: 18%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 10pt">(a)&#9746;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 10pt">(b)</FONT>&#9744;</P></TD></TR>
<TR STYLE="vertical-align: top; background-color: #DDDDDD">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>3</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC USE ONLY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>4</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CITIZENSHIP OR PLACE OF ORGANIZATION</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">US</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD ROWSPAN="4" STYLE="width: 20%; border-left: black 1pt solid; border-bottom: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">NUMBER OF</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARES</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">BENEFICIALLY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">OWNED BY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">EACH REPORTING</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">PERSON WITH:</P></TD>
    <TD STYLE="vertical-align: top; width: 11%; border-left: black 1pt solid; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>5</B></FONT></TD>
    <TD STYLE="vertical-align: top; width: 69%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SOLE VOTING POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">0</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>6</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARED VOTING POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SOLE DISPOSITIVE POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">0</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>8</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARED DISPOSITIVE POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-left: black 1pt solid; border-bottom: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>9</B></FONT></TD>
    <TD STYLE="width: 90%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">599,519</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>10</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
        SHARES (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 34.7pt 0pt 0">&#9744;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>11</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5.0%</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 18pt"><B>12</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TYPE OF REPORTING PERSON (see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">IN</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
<!-- Field: Page; Sequence: 4 -->
    <DIV STYLE="margin-top: 8pt; margin-bottom: 6pt; border-bottom: Black 2px solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%; text-align: center">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->4<!-- Field: /Sequence --> of 8 pages</TD><TD STYLE="width: 33%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 8pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: left; width: 100%"><FONT STYLE="font-size: 8pt">&nbsp;</FONT></TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>Item 1(a).</B></FONT></TD>
    <TD STYLE="width: 90%; font-size: 10pt"><FONT STYLE="font-size: 10pt">Name of Issuer:</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">The name of the issuer is Catalyst Biosciences, Inc. (the &ldquo;Company&rdquo;).</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>Item 1(b).</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Address of Issuer&rsquo;s Principal Executive Offices:</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The Company&rsquo;s principal executive offices are located
        at</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">611 Gateway Boulevard, Suite 710, South San Francisco, California
        94080.</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>Item 2(a).</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Name of Person Filing:</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">This Schedule 13G is being jointly filed by (1) The Mangrove
        Partners Master Fund, Ltd. (the &ldquo;Master Fund&rdquo;), (2) Mangrove Partners, and (3) Nathaniel August. Each of the foregoing
        is referred to as a &ldquo;Reporting Person&rdquo; and collectively as the &ldquo;Reporting Persons.&rdquo;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The shares of common stock of the Issuer which are the subject
        of this Schedule 13G (the &ldquo;Shares&rdquo;) are held by the Master Fund. Beneficial ownership of the Shares is also claimed
        by (i) Mangrove Partners which serves as the investment manager of the Master Fund, and (iii) Nathaniel August who is the principal
        of Mangrove Partners.</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>Item 2(b).</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Address of Principal Business Office or, if none, Residence:</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The principal business office of Nathaniel August is 645 Madison
        Avenue, 14th Floor, New York, New York 10022.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The principal business address of the Master Fund and Mangrove
        Partners is c/o Maples Corporate Services, Ltd., PO Box 309, Ugland House, South Church Street, George Town, Grand Cayman, Cayman
        Islands KY1-1104.</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>Item 2(c).</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Citizenship:</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Each of the Master Fund and Mangrove Partners is organized as a limited liability exempted company under the laws of the Cayman Islands. Nathaniel August is a citizen of the United States.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>Item 2(d).</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Title of Class of Securities:</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Common Stock, $0.001 par value per Share</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>Item 2(e).</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">CUSIP Number:&nbsp;&nbsp;14888D208</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD ROWSPAN="12" STYLE="font-size: 10pt; white-space: nowrap"><FONT STYLE="font-size: 10pt"><B>Item 3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</B></FONT></TD>
    <TD COLSPAN="3" STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt"><B>If this Statement is filed pursuant to 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Broker or dealer registered under Section 15 of the Act;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(b)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Bank as defined in Section 3(a)(6) of the Act;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(c)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Insurance company as defined in Section 3(a)(19) of the Act;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(d)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Investment company registered under Section 8 of the Investment Company Act of 1940;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(e)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(f)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(g)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(h)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(i)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">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;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(j)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">A non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J);</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(k)</FONT></TD>
    <TD STYLE="font-size: 10pt">&#9744;&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J), please specify the type of institution: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>Item 4.</B></FONT></TD>
    <TD COLSPAN="4"><FONT STYLE="font-size: 10pt"><B>Ownership.</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD COLSPAN="4"><FONT STYLE="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.</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-size: 10pt">(a)</FONT></TD>
    <TD COLSPAN="2" STYLE="vertical-align: top"><FONT STYLE="font-size: 10pt">Amount Beneficially Owned:</FONT></TD>
    <TD STYLE="vertical-align: bottom; text-align: right"><FONT STYLE="font-size: 10pt">599,519&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">(b)</FONT></TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 10pt">Percent of Class:</FONT></TD>
    <TD STYLE="text-align: right"><FONT STYLE="font-size: 10pt">5.0%</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">(c)</FONT></TD>
    <TD COLSPAN="3"><FONT STYLE="font-size: 10pt">Number of shares as to which such person has:</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 6%"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="width: 4%"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="width: 4%"><FONT STYLE="font-size: 10pt">(i)</FONT></TD>
    <TD STYLE="width: 66%"><FONT STYLE="font-size: 10pt">sole power to vote or to direct the vote:</FONT></TD>
    <TD STYLE="width: 20%; text-align: right"><FONT STYLE="font-size: 10pt">0&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-size: 10pt">(ii)</FONT></TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-size: 10pt">shared power to vote or to direct the vote:</FONT></TD>
    <TD STYLE="vertical-align: bottom; text-align: right"><FONT STYLE="font-size: 10pt">599,519</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">(iii)</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">sole power to dispose or to direct the disposition of:</FONT></TD>
    <TD STYLE="text-align: right"><FONT STYLE="font-size: 10pt">0&nbsp;&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">(iv)</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">shared power to dispose or to direct the disposition of:</FONT></TD>
    <TD STYLE="text-align: right"><FONT STYLE="font-size: 10pt">599,519</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">As the investment manager the Master Fund, Mangrove Partners
may be deemed the beneficial owner of the Shares owned by the Master Fund. Mr. August, as the principal of Mangrove Partners, may
be deemed the beneficial owner of the Shares owned by the Master Fund.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The filing of this Schedule 13G shall not be construed as an
admission that the Reporting Persons are, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, the
beneficial owners of any of the Shares reported herein. Each of the Reporting Persons specifically disclaims beneficial ownership
of the Shares reported herein that are not directly owned by such Reporting Person.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The foregoing beneficial ownership percentage is based upon
11,980,103 shares of Common Stock of the Company, issued and outstanding as of April 30, 2019, based on information reported by
the Company in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 2, 2019.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%"><FONT STYLE="font-size: 10pt"><B>Item 5.</B></FONT></TD>
    <TD STYLE="width: 91%"><FONT STYLE="font-size: 10pt"><B>Ownership of Five Percent or Less of a Class.</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="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 &#9744;</FONT><FONT STYLE="font-size: 10pt">.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%"><FONT STYLE="font-size: 10pt"><B>Item 6.</B></FONT></TD>
    <TD STYLE="width: 91%"><FONT STYLE="font-size: 10pt"><B>Ownership of More than Five Percent on Behalf of Another Person.</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">Not applicable.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>Item 7.</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">Not applicable.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>Item 8.</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>Identification and Classification of Members of the Group.</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">Incorporated by reference to Exhibit A below.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>Item 9.</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>Notice of Dissolution of Group.</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">Not applicable.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>Item 10.</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>Certification.</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><B>&nbsp;</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of and do not have the effect of changing 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 such purpose or effect for the time being.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">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>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%"><FONT STYLE="font-size: 10pt">May 14, 2019</FONT></TD>
    <TD STYLE="width: 90%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">THE MANGROVE PARTNERS MASTER FUND, LTD.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">MANGROVE PARTNERS</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">the Investment Manager</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><U>/s/ Nathaniel August</U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Name:&nbsp;&nbsp;Nathaniel August</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Title:&nbsp;&nbsp;Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2"><FONT STYLE="font-size: 10pt">MANGROVE PARTNERS</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><U>/s/ Nathaniel August</U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Name:&nbsp;&nbsp;Nathaniel August</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Title:&nbsp;&nbsp;Director</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><U>/s/ Nathaniel August</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Name: Nathaniel August&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE 13G</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 74%; text-align: left"><FONT STYLE="font-size: 10pt">CUSIP No. 14888D208</FONT></TD>
    <TD STYLE="width: 26%; text-align: right"><FONT STYLE="font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Page 8 of 8 Pages</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><B>Exhibit A</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>JOINT FILING AGREEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">This agreement is made pursuant to Rule 13d-1(c) under the Securities
Exchange Act of 1934, as amended (the &ldquo;Act&rdquo;), by and among the parties listed below, each referred to herein as a &ldquo;Joint
Filer.&rdquo; The Joint Filers agree that the foregoing Schedule 13G with respect to the Common Stock, $0.001 par value per Share
of Catalyst Biosciences, Inc. is filed on behalf of each of the undersigned and that all subsequent amendments to such statement
shall be filed on behalf of each of the undersigned without necessity of filing an additional joint filing agreement. This joint
filing agreement may be included as an exhibit to such joint filing.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The undersigned further agree that each party hereto is responsible
for the timely filing of such Statement on Schedule&nbsp;13G and, if necessary, Schedule 13D and any amendments to either or both,
and for the accuracy and completeness of the information concerning such party contained therein; provided, however, that no party
is responsible for the accuracy or completeness of the information concerning any other party, unless such party knows or has reason
to believe that such information is inaccurate.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">This Joint Filing Agreement may be signed in counterparts with
the same effect as if the signature on each counterpart were upon the same instrument.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">IN WITNESS WHEREOF, each of the undersigned hereby executes
this Joint Filing Agreement as of this 14<SUP>th</SUP> day of May, 2019.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">THE MANGROVE PARTNERS MASTER FUND, LTD.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; width: 10%"><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD STYLE="text-align: justify; width: 90%"><FONT STYLE="font-size: 10pt">MANGROVE PARTNERS</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">the Investment Manager</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><U>/s/ Nathaniel August</U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Name:&nbsp;&nbsp;Nathaniel August</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Title:&nbsp;&nbsp;Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2"><FONT STYLE="font-size: 10pt">MANGROVE PARTNERS</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt"><U>/s/ Nathaniel August</U></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Name:&nbsp;&nbsp;Nathaniel August</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Title:&nbsp;&nbsp;Director</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><U>/s/ Nathaniel August</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Name: Nathaniel August&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Page 8 of 8 pages</P>



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<P STYLE="margin: 0">&nbsp;</P>

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