<SEC-DOCUMENT>0001013594-17-000844-index.html : 20171227
<SEC-HEADER>0001013594-17-000844.hdr.sgml : 20171227
<ACCEPTANCE-DATETIME>20171227133048
ACCESSION NUMBER:		0001013594-17-000844
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20171227
DATE AS OF CHANGE:		20171227

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:		171275806

	BUSINESS ADDRESS:	
		STREET 1:		260 LITTLEFIELD AVENUE
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		6507450655

	MAIL ADDRESS:	
		STREET 1:		260 LITTLEFIELD AVENUE
		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:			NEXTHERA CAPITAL LP
		CENTRAL INDEX KEY:			0001646343
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		900 THIRD AVENUE
		STREET 2:		SUITE 1100
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		(212) 213-7033

	MAIL ADDRESS:	
		STREET 1:		900 THIRD AVENUE
		STREET 2:		SUITE 1100
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>catalystb13g-122117.htm
<DESCRIPTION>DECEMBER 21, 2017
<TEXT>
Document 1 - file: catalystb13g-122117.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>catalystbex991-122117.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: catalystbex991-122117.htm

</DOCUMENT>
</SEC-DOCUMENT>