<SEC-DOCUMENT>0001453814-19-000161-index.html : 20191028
<SEC-HEADER>0001453814-19-000161.hdr.sgml : 20191028
<ACCEPTANCE-DATETIME>20191028170233
ACCESSION NUMBER:		0001453814-19-000161
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20191024
FILED AS OF DATE:		20191028
DATE AS OF CHANGE:		20191028

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Otner Michael I.
		CENTRAL INDEX KEY:			0001569033

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34387
		FILM NUMBER:		191173727

	MAIL ADDRESS:	
		STREET 1:		C/O MEDIDATA SOLUTIONS, INC.
		STREET 2:		79 FIFTH AVENUE, 8TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10003

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Medidata Solutions, Inc.
		CENTRAL INDEX KEY:			0001453814
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				522319066
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		350 HUDSON ST.,  9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10014
		BUSINESS PHONE:		212.918.1800

	MAIL ADDRESS:	
		STREET 1:		350 HUDSON ST.,  9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10014
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_157229652453198.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wf-form4_157229652453198.html

Document 1 - RAW XML: wf-form4_157229652453198.xml

</DOCUMENT>
</SEC-DOCUMENT>