<SEC-DOCUMENT>0001104659-17-003636-index.html : 20170123
<SEC-HEADER>0001104659-17-003636.hdr.sgml : 20170123
<ACCEPTANCE-DATETIME>20170123212149
ACCESSION NUMBER:		0001104659-17-003636
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170120
FILED AS OF DATE:		20170123
DATE AS OF CHANGE:		20170123

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LEAP THERAPEUTICS, INC.
		CENTRAL INDEX KEY:			0001509745
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				274412575
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		47 THORNDIKE STREET
		STREET 2:		SUITE B1-1
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		617 252 4343

	MAIL ADDRESS:	
		STREET 1:		47 THORNDIKE STREET
		STREET 2:		SUITE B1-1
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Dekkun Corp
		DATE OF NAME CHANGE:	20110107

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WERNER HAROLD R
		CENTRAL INDEX KEY:			0001013603

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37990
		FILM NUMBER:		17542379

	MAIL ADDRESS:	
		STREET 1:		C/O HEALTHCARE VENTURES LLC
		STREET 2:		44 NASSAU STREET
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HealthCare Partners VIII, LLC
		CENTRAL INDEX KEY:			0001358992
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37990
		FILM NUMBER:		17542380

	BUSINESS ADDRESS:	
		STREET 1:		44 NASSAU STREET
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542
		BUSINESS PHONE:		609-430-3913

	MAIL ADDRESS:	
		STREET 1:		44 NASSAU STREET
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HealthCare Partners VIII, L.P.
		CENTRAL INDEX KEY:			0001358991
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37990
		FILM NUMBER:		17542381

	BUSINESS ADDRESS:	
		STREET 1:		44 NASSAU STREET
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542
		BUSINESS PHONE:		609-430-3913

	MAIL ADDRESS:	
		STREET 1:		44 NASSAU STREET
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HealthCare Ventures VIII, L.P.
		CENTRAL INDEX KEY:			0001358990
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37990
		FILM NUMBER:		17542382

	BUSINESS ADDRESS:	
		STREET 1:		44 NASSAU STREET
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542
		BUSINESS PHONE:		609-430-3913

	MAIL ADDRESS:	
		STREET 1:		44 NASSAU STREET
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>a3.xml
<DESCRIPTION>3
<TEXT>
Document 1 - file: a3.html

Document 1 - RAW XML: a3.xml

</DOCUMENT>
</SEC-DOCUMENT>