<SEC-DOCUMENT>0001193125-19-040874-index.html : 20190214
<SEC-HEADER>0001193125-19-040874.hdr.sgml : 20190214
<ACCEPTANCE-DATETIME>20190214161802
ACCESSION NUMBER:		0001193125-19-040874
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20190214
DATE AS OF CHANGE:		20190214
GROUP MEMBERS:		IVY INVESTMENT MANAGEMENT CO

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Sientra, Inc.
		CENTRAL INDEX KEY:			0001551693
		STANDARD INDUSTRIAL CLASSIFICATION:	ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
		IRS NUMBER:				205551000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88390
		FILM NUMBER:		19606597

	BUSINESS ADDRESS:	
		STREET 1:		420 SOUTH FAIRVIEW AVENUE
		STREET 2:		SUITE 200
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93117
		BUSINESS PHONE:		805-562-3500

	MAIL ADDRESS:	
		STREET 1:		420 SOUTH FAIRVIEW AVENUE
		STREET 2:		SUITE 200
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93117

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WADDELL & REED FINANCIAL INC
		CENTRAL INDEX KEY:			0001052100
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		IRS NUMBER:				510261715
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		6300 LAMAR AVE
		CITY:			OVERLAND PARK
		STATE:			KS
		ZIP:			66202-4200
		BUSINESS PHONE:		9132362000

	MAIL ADDRESS:	
		STREET 1:		PO BOX 29217
		CITY:			SHAWNEE MISSION
		STATE:			KS
		ZIP:			66201-9217
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>d667945dsc13g.htm
<DESCRIPTION>SIENTRA, INC.
<TEXT>
Document 1 - file: d667945dsc13g.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d667945dex991.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: d667945dex991.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>3
<FILENAME>d667945dex992.htm
<DESCRIPTION>IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY
<TEXT>
Document 3 - file: d667945dex992.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>4
<FILENAME>d667945dex993.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
Document 4 - file: d667945dex993.htm

</DOCUMENT>
</SEC-DOCUMENT>