    <SEC-DOCUMENT>0000886163-17-000114-index.html : 20171004
    <SEC-HEADER>0000886163-17-000114.hdr.sgml : 20171004
    <ACCEPTANCE-DATETIME>20171004164739
    ACCESSION NUMBER:		0000886163-17-000114
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		8
    CONFORMED PERIOD OF REPORT:	20171004
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Other Events
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20171004
    DATE AS OF CHANGE:		20171004

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			LIGAND PHARMACEUTICALS INC
    		CENTRAL INDEX KEY:			0000886163
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				770160744
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-33093
    		FILM NUMBER:		171122199

    	BUSINESS ADDRESS:
    		STREET 1:		3911 SORRENTO VALLEY BLVD
    		STREET 2:		SUITE 110
    		CITY:			SAN DIEGO
    		STATE:			CA
    		ZIP:			92121
    		BUSINESS PHONE:		858-550-7500

    	MAIL ADDRESS:
    		STREET 1:		3911 SORRENTO VALLEY BLVD
    		STREET 2:		SUITE 110
    		CITY:			SAN DIEGO
    		STATE:			CA
    		ZIP:			92121
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>a8k-crystalmerger8k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a8k-crystalmerger8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-2.1
    <SEQUENCE>2
    <FILENAME>exhibit21-crystalmergeragr.htm
    <DESCRIPTION>EXHIBIT 2.1
    <TEXT>
    Document 2 - file: exhibit21-crystalmergeragr.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>3
    <FILENAME>ligandtoacquirecrystalbi.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 3 - file: ligandtoacquirecrystalbi.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ligandtoacquirecrystalbi001.jpg
    <TEXT>
    Document 4 - file: ligandtoacquirecrystalbi001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>ligandtoacquirecrystalbi002.jpg
    <TEXT>
    Document 5 - file: ligandtoacquirecrystalbi002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>ligandtoacquirecrystalbi003.jpg
    <TEXT>
    Document 6 - file: ligandtoacquirecrystalbi003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>ligandtoacquirecrystalbi004.jpg
    <TEXT>
    Document 7 - file: ligandtoacquirecrystalbi004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ligandtoacquirecrystalbi005.jpg
    <TEXT>
    Document 8 - file: ligandtoacquirecrystalbi005.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>