<SEC-DOCUMENT>0000950170-24-035788-index.html : 20240325
<SEC-HEADER>0000950170-24-035788.hdr.sgml : 20240325
<ACCEPTANCE-DATETIME>20240325133755
ACCESSION NUMBER:		0000950170-24-035788
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20240325
FILED AS OF DATE:		20240325
DATE AS OF CHANGE:		20240325

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MACKAY SHIELDS LLC
		CENTRAL INDEX KEY:			0000061227
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-23905
		FILM NUMBER:		24778307

	BUSINESS ADDRESS:	
		STREET 1:		1345 AVENUE OF THE AMERICAS
		STREET 2:		42ND  FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10105
		BUSINESS PHONE:		212-230-3811

	MAIL ADDRESS:	
		STREET 1:		1345 AVENUE OF THE AMERICAS
		STREET 2:		42ND FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10105

	FORMER NAME:	
		FORMER CONFORMED NAME:	MACKAY SHIELDS FINANCIAL CORP
		DATE OF NAME CHANGE:	19920929

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MainStay MacKay Municipal Income Opportunities Fund
		CENTRAL INDEX KEY:			0001995668
		ORGANIZATION NAME:           	
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		51 MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		212-576-7000

	MAIL ADDRESS:	
		STREET 1:		51 MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
</SEC-HEADER>
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<TYPE>3
<SEQUENCE>1
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<DESCRIPTION>3
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Document 1 - file: ownership.html

Document 1 - RAW XML: ownership.xml

</DOCUMENT>
</SEC-DOCUMENT>