# EDGAR Filing Document

**Accession Number:** 0002058920
**File Stem:** 0001104659-25-104095
**Filing Date:** 2025-10
**Character Count:** 1518
**Document Hash:** 50e7b1ffc831c09f498b580024512c7d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-104095.hdr.sgml**: 20251030

**ACCESSION NUMBER**: 0001104659-25-104095

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251030

**DATE AS OF CHANGE**: 20251030

**EFFECTIVENESS DATE**: 20251030

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Morgan Stanley Portfolios, Series 81
- **CENTRAL INDEX KEY:** 0002058920

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-285632
- **FILM NUMBER:** 251432921

**BUSINESS ADDRESS:**
- **STREET 1:** 2000 WESTCHESTER AVENUE
- **CITY:** PURCHASE
- **STATE:** NY
- **ZIP:** 10577
- **BUSINESS PHONE:** 9142251000

**MAIL ADDRESS:**
- **STREET 1:** 2000 WESTCHESTER AVENUE
- **CITY:** PURCHASE
- **STATE:** NY
- **ZIP:** 10577

NO SERIES-AND-CLASSES-CONTRACTS-DATA BLOCK FOUND

Filed Pursuant to Rule 497(d)

Morgan Stanley Portfolios, Series 81

Humanoid Robotics: Emerging Contributors

Supplement to the Prospectus

As a result of a previously announced spinoff, on October 30, 2025, holders of Honeywell International Inc. ("HON") shares received 1 share of Solstice Advanced Materials Inc ("SOLS") common stock for every 4 shares of HON common stock held as of the close of business on October 17, 2025.

Notwithstanding anything to the contrary in the Trust's Prospectus, the Trust now holds, and will continue to purchase, shares of both HON and SOLS.

Supplement Dated: October 30, 2025

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