<SEC-DOCUMENT>0000921895-21-000866-index.html : 20210326
<SEC-HEADER>0000921895-21-000866.hdr.sgml : 20210326
<ACCEPTANCE-DATETIME>20210326170757
ACCESSION NUMBER:		0000921895-21-000866
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210326
DATE AS OF CHANGE:		20210326

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Summit Therapeutics Inc.
		CENTRAL INDEX KEY:			0001599298
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88759
		FILM NUMBER:		21778397

	BUSINESS ADDRESS:	
		STREET 1:		ONE BROADWAY
		STREET 2:		14TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		617-514-7149

	MAIL ADDRESS:	
		STREET 1:		ONE BROADWAY
		STREET 2:		14TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Summit Therapeutics plc
		DATE OF NAME CHANGE:	20150219

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Summit Corp plc
		DATE OF NAME CHANGE:	20140205

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DUGGAN ROBERT W
		CENTRAL INDEX KEY:			0001055919

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	MAIL ADDRESS:	
		STREET 1:		611 SOUTH FORT HARRISON AVE
		STREET 2:		SUITE 306
		CITY:			CLEARWATER
		STATE:			FL
		ZIP:			33756
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>sc13da312566002_03262021.htm
<TEXT>
Document 1 - file: sc13da312566002_03262021.htm

</DOCUMENT>
</SEC-DOCUMENT>