<SEC-DOCUMENT>0000899866-15-000076-index.html : 20150303
<SEC-HEADER>0000899866-15-000076.hdr.sgml : 20150303
<ACCEPTANCE-DATETIME>20150303211327
ACCESSION NUMBER:		0000899866-15-000076
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150227
FILED AS OF DATE:		20150303
DATE AS OF CHANGE:		20150303

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:		352 KNOTTER DRIVE
		CITY:			CHESHIRE
		STATE:			CT
		ZIP:			06511
		BUSINESS PHONE:		2037761790

	MAIL ADDRESS:	
		STREET 1:		352 KNOTTER DRIVE
		CITY:			CHESHIRE
		STATE:			CT
		ZIP:			06511

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MACKAY MARTIN
		CENTRAL INDEX KEY:			0001414815

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27756
		FILM NUMBER:		15671568

	MAIL ADDRESS:	
		STREET 1:		PFIZER INC ATTN CORPORATE SECRETARY
		STREET 2:		235 EAST 42ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_142543519721591.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wf-form4_142543519721591.html

Document 1 - RAW XML: wf-form4_142543519721591.xml

</DOCUMENT>
</SEC-DOCUMENT>