<SEC-DOCUMENT>0001752724-19-191663-index.html : 20191217
<SEC-HEADER>0001752724-19-191663.hdr.sgml : 20191217
<ACCEPTANCE-DATETIME>20191217163422
ACCESSION NUMBER:		0001752724-19-191663
CONFORMED SUBMISSION TYPE:	NPORT-P
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20191031
FILED AS OF DATE:		20191217
PERIOD START:           	20191031

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MAINSTAY FUNDS
		CENTRAL INDEX KEY:			0000787441
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		NPORT-P
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04550
		FILM NUMBER:		191290138

	BUSINESS ADDRESS:	
		STREET 1:		51 MADISON AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		2125767000

	MAIL ADDRESS:	
		STREET 1:		51 MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MACKAY SHIELDS MAINSTAY SERIES FUND /NY/
		DATE OF NAME CHANGE:	19911126

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MACKAY SHIELDS SERIES FUND
		DATE OF NAME CHANGE:	19860506
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000787441
<SERIES-ID>S000006905
<SERIES-NAME>MainStay Large Cap Growth Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018724
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>MLAAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018725
<CLASS-CONTRACT-NAME>Class B
<CLASS-CONTRACT-TICKER-SYMBOL>MLABX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018726
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>MLACX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018727
<CLASS-CONTRACT-NAME>Class I
<CLASS-CONTRACT-TICKER-SYMBOL>MLAIX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018728
<CLASS-CONTRACT-NAME>Class R1
<CLASS-CONTRACT-TICKER-SYMBOL>MLRRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018729
<CLASS-CONTRACT-NAME>Class R2
<CLASS-CONTRACT-TICKER-SYMBOL>MLRTX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000030958
<CLASS-CONTRACT-NAME>Class R3
<CLASS-CONTRACT-TICKER-SYMBOL>MLGRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000060800
<CLASS-CONTRACT-NAME>INVESTOR CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>MLINX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000127162
<CLASS-CONTRACT-NAME>Class R6
<CLASS-CONTRACT-TICKER-SYMBOL>MLRSX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>NPORT-P
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>