<SEC-DOCUMENT>0000899866-17-000026-index.html : 20170208
<SEC-HEADER>0000899866-17-000026.hdr.sgml : 20170208
<ACCEPTANCE-DATETIME>20170208163925
ACCESSION NUMBER:		0000899866-17-000026
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170206
FILED AS OF DATE:		20170208
DATE AS OF CHANGE:		20170208

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALEXION PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0000899866
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				133648318
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		100 COLLEGE STREET
		CITY:			NEW HAVEN
		STATE:			CT
		ZIP:			06510
		BUSINESS PHONE:		2032722596

	MAIL ADDRESS:	
		STREET 1:		100 COLLEGE STREET
		CITY:			NEW HAVEN
		STATE:			CT
		ZIP:			06510

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Thiel Carsten
		CENTRAL INDEX KEY:			0001633582

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27756
		FILM NUMBER:		17583060

	MAIL ADDRESS:	
		STREET 1:		C/O ALEXION PHARMACEUTICALS
		STREET 2:		352 KNOTTER DRIVE
		CITY:			CHESHIRE
		STATE:			CT
		ZIP:			06410
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_148658995271085.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wf-form4_148658995271085.html

Document 1 - RAW XML: wf-form4_148658995271085.xml

</DOCUMENT>
</SEC-DOCUMENT>