# EDGAR Filing Document

**Accession Number:** 0001995668
**File Stem:** 0001193125-25-141215
**Filing Date:** 2025-6
**Character Count:** 1837
**Document Hash:** 6b2d66f50273164c36ca433c565253a5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-141215.hdr.sgml**: 20250616

**ACCESSION NUMBER**: 0001193125-25-141215

**CONFORMED SUBMISSION TYPE**: 424B3

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250616

**DATE AS OF CHANGE**: 20250616

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NYLI MacKay Muni Income Opportunities Fund
- **CENTRAL INDEX KEY:** 0001995668

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 424B3
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-274888
- **FILM NUMBER:** 251048851

**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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MainStay MacKay Municipal Income Opportunities Fund
- **DATE OF NAME CHANGE:** 20230929

**Filed pursuant to Rule 424(b)(3) <br>File No. 333-274888** 

NYLI MACKAY MUNI INCOME OPPORTUNITIES FUND

(the "Fund")

Supplement dated June 16, 2025 ("Supplement") to the

Prospectus and Statement of Additional Information ("SAI")

each dated February 25, 2025, as supplemented

*Capitalized terms and certain other terms used in this Supplement, unless otherwise defined in this Supplement, have the meanings assigned to them in the Prospectus and SAI.* 

Effective immediately, Class I Shares will also be made available to all existing employees of New York Life Insurance Company and its affiliates and subsidiaries. For such shareholders, the minimum initial investment is $1,000 per account and a $20 minimum for subsequent bi-weekly purchases.

PLEASE RETAIN THIS SUPPLEMENT FOR YOUR FUTURE REFERENCE.

REG-00067-06/25