<SEC-DOCUMENT>0000950123-05-004582-index.html : 20050415
<SEC-HEADER>0000950123-05-004582.hdr.sgml : 20050415
<ACCEPTANCE-DATETIME>20050415170741
ACCESSION NUMBER:		0000950123-05-004582
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20050415
DATE AS OF CHANGE:		20050415

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALNYLAM PHARMACEUTICALS, INC.
		CENTRAL INDEX KEY:			0001178670
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				770602661

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-79884
		FILM NUMBER:		05754416

	BUSINESS ADDRESS:	
		STREET 1:		300 THIRD STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		(617) 551-8200

	MAIL ADDRESS:	
		STREET 1:		300 THIRD STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALNYLAM PHARMACEUTICALS INC
		DATE OF NAME CHANGE:	20020724

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERCK & CO INC
		CENTRAL INDEX KEY:			0000064978
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				221109110
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		P O BOX 100
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100
		BUSINESS PHONE:		9084234044

	MAIL ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		PO BOX 100 WS3AB-05
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>y07887sc13g.txt
<DESCRIPTION>SCHEDULE 13G
<TEXT>
Document 1 - file: y07887sc13g.txt

</DOCUMENT>
</SEC-DOCUMENT>