0000950170-24-035788.txt : 20240325 0000950170-24-035788.hdr.sgml : 20240325 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 3 1 ownership.xml 3 X0206 3 2024-03-25 0 0001995668 MainStay MacKay Municipal Income Opportunities Fund MMIOX 0000061227 MACKAY SHIELDS LLC 1345 AVENUE OF THE AMERICAS NEW YORK NY 10105 false false false true Subadvisor Shares of beneficial interest 0 D /s/ Rene A. Bustamanate, Executive Managing Director, Chief Adminstrative Officer 2024-03-25