# EDGAR Filing Document

**Accession Number:** 0002054546
**File Stem:** 0001528621-26-000001
**Filing Date:** 2026-1
**Character Count:** 1493
**Document Hash:** 2780d5372d53d766919f03890b9bb0f5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001528621-26-000001.hdr.sgml**: 20260102

**ACCESSION NUMBER**: 0001528621-26-000001

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260102

**DATE AS OF CHANGE**: 20260102

**EFFECTIVENESS DATE**: 20260102

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Invesco Unit Trusts Series 2451
- **CENTRAL INDEX KEY:** 0002054546

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** NY

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-290170
- **FILM NUMBER:** 26501212

**BUSINESS ADDRESS:**
- **STREET 1:** 225 LIBERTY STREET
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10281
- **BUSINESS PHONE:** 2126524344

**MAIL ADDRESS:**
- **STREET 1:** 225 LIBERTY STREET
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10281

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

Filed Pursuant to Rule 497(d)

**INVESCO UNIT TRUSTS, SERIES 2451**

Preferred Opportunity Portfolio 2025-4

**Supplement to the Prospectus**

As a result of a previously announced merger, your Portfolio received one preferred share of Pinnacle Financial Partners Inc, Series B 8.397% in place of each Synovus Financial Corp, Series E 8.397% preferred share held as of the close of business on January 2, 2026, the record date. Your Portfolio will continue to hold and purchase preferred shares of Pinnacle Financial Partners Inc, Series B 8.397%.

Supplement Dated: January 2, 2026