# EDGAR Filing Document

**Accession Number:** 0001469192
**File Stem:** 0001741773-23-000982
**Filing Date:** 2023-3
**Character Count:** 2298
**Document Hash:** af81b61433c7ed103dc7bb49b5db6950
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001741773-23-000982.hdr.sgml**: 20230331

**ACCESSION NUMBER**: 0001741773-23-000982

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230331

**DATE AS OF CHANGE**: 20230331

**EFFECTIVENESS DATE**: 20230331

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MAINSTAY FUNDS TRUST
- **CENTRAL INDEX KEY:** 0001469192
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-160918
- **FILM NUMBER:** 23783571

**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

## Series and Classes Contracts Data

### MainStay Cushing MLP Premier Fund (Series ID: S000045768)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000142690 | Class A        | CSHAX           |
| C000142691 | Class C        | CSHCX           |
| C000142692 | Class I        | CSHZX           |
| C000142693 | Investor Class | CSHNX           |

#### MAINSTAY FUNDS TRUST

#### 51 Madison Avenue

#### New York, NY 10010

#### VIA EDGAR
March 31, 2023

Securities and Exchange Commission

Division of Investment Management

100 F Street, N.E.

Washington, D.C. 20549

#### Re: MainStay Funds Trust (the "Registrant")

#### SEC File Nos. 333-160918 and 811-22321
Dear Sir or Madam:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended ("1933 Act"), the Registrant hereby certifies that the Prospectus and Statement of Additional Information that would have been filed under paragraph (c) of Rule 497 do not differ from those contained in Post-Effective Amendment No. 181 to the Registrant's Registration Statement on Form N-1A under the 1933 Act and Amendment No. 189 under the Investment Company Act of 1940, which became effective on March 30, 2023.

No fee is required in connection with this filing. Please direct any questions concerning the filing to the undersigned at 973-610-0124.

Very truly yours,

<u>/s/Thomas C. Humbert, Jr.</u>

Thomas C. Humbert, Jr.

Assistant Secretary

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