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Filing Details

Accession Number:: 0001085146-24-001647
Form Type:: 13D Filing
Publication Date:: 2024-04-07 20:00:00

Filed By:: New York Life Investment Management Llc
Company:: Mainstay Mackay Municipal Income Opportunities Fund
Filing Date:: 2024-04-08
SEC Url:: 13D Filing

Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name	Sole Voting Power	Shared Voting Power	Sole Dispositive Power	Shared Dispositive Power	Aggregate Amount Owned Power	Percent of Class
New York Life Investment Management	2,500	0	2,500	0	2,500	100%

Filing

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

MainStay MacKay Municipal Income Opportunities Fund

(Name of Issuer)

Class A1 Common Shares

(Title of Class of Securities)

56062L209

(CUSIP Number)

New York Life Investment Management LLC
51 Madison Ave
New York, NY 10010
Attention: Kevin M. Bopp
201-685-6187

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

March 25, 2024

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. [ ]

* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page

The information required on the remainder of this cover page shall not be deemed to be filed for the purposes of Section 18 of the Securities Exchange Act of 1934 (the Act) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Instructions).

CUSIP No.: 56062L209

ITEM 1.	SECURITY AND ISSUER:
	This statement on Schedule 13D (the Schedule 13D) relates to Class A1 common shares (Class A1 Shares) of MainStay MacKay Municipal Income Opportunities Fund (the Issuer or Fund), a Delaware statutory trust registered under the Investment Company Act of 1940, as amended (the Investment Company Act), as a non-diversified, closed-end management investment company. The principal executive office of the Fund is located at 51 Madison Ave, New York, NY 10010
ITEM 2.	IDENTITY AND BACKGROUND:
	(a) New York Life Investment Management LLC (NYLIM) (b) 51 Madison Ave, New York, NY 10010 (c) NYLIM is a registered investment adviser and serves as investment adviser to the Issuer. (d) None (e) None (f) NYLIM is organized in the State of Delaware NYLIMs sole member and sole interest holder is New York Life Investment Management Holdings LLC, a Delaware limited liability company whose business address is 51 Madison Ave, New York, NY 10010. New York Life Investment Management Holdings LLC has not, during the last five years, been (i) convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors); or (ii) a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. The directors and executive officers of NYLIM and New York Life Investment Management Holdings LLC are listed in Exhibit A.
ITEM 3.	SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION:
	On March 25, 2024, in order to launch the Funds Class A1 Shares, NYLIM provided a seed investment in the Fund by acquiring 2,500 Class A1 Shares for $10.00 per share (the Seed Investment). The funds used to purchase the shares of Issuers Class A1 Shares in the above transaction were from existing available operating capital of NYLIM, and none of the consideration for such shares was represented by borrowed funds.
ITEM 4.	PURPOSE OF TRANSACTION:
	The reported securities were acquired solely to seed and support the Fund.
ITEM 5.	INTEREST IN SECURITIES OF THE ISSUER:
	(a) The aggregate number and percentage of the class of securities identified pursuant to Item 1 beneficially owned by the Reporting Person is stated in Items 11 and 13 on the cover page hereto. (b) The information set forth in Items 7 through 11 of the cover page hereto is incorporated herein by reference. (c) Except as disclosed in this Schedule 13D, the Reporting Person has not effected any transactions in Class A1 Shares of the Issuer during the past 60 days. (d) Not Applicable (e) Not Applicable
ITEM 6.	CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER:
	The relationship between NYLIM and New York Life Investment Management Holdings LLC is described in response to Item 2.
ITEM 7.	MATERIALS TO BE FILES AS EXHIBITS:
	Exhibit A: NYLIM and New York Life Investment Management Holdings LLC Executive Officers and Directors