<SEC-DOCUMENT>0001193125-17-117195-index.html : 20170410
<SEC-HEADER>0001193125-17-117195.hdr.sgml : 20170410
<ACCEPTANCE-DATETIME>20170410061034
ACCESSION NUMBER:		0001193125-17-117195
CONFORMED SUBMISSION TYPE:	424B4
PUBLIC DOCUMENT COUNT:		6
FILED AS OF DATE:		20170410
DATE AS OF CHANGE:		20170410

FILER:

	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:		424B4
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-216663
		FILM NUMBER:		17751571

	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
</SEC-HEADER>
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<TYPE>424B4
<SEQUENCE>1
<FILENAME>d358624d424b4.htm
<DESCRIPTION>424B4
<TEXT>
Document 1 - file: d358624d424b4.htm

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<DESCRIPTION>GRAPHIC
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Document 2 - file: g358624g01a50.jpg

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<SEQUENCE>3
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<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g358624g46i45.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g358624g69h63.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g358624g69h63.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g358624g77z33.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g358624g77z33.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g358624g84k52.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g358624g84k52.jpg

</DOCUMENT>
</SEC-DOCUMENT>