# EDGAR Filing Document

**Accession Number:** 0000842790
**File Stem:** 0001193125-26-254731
**Filing Date:** 2026-6
**Character Count:** 4508
**Document Hash:** fa97178a82e921017b01bc624aabd636
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-254731.hdr.sgml**: 20260603

**ACCESSION NUMBER**: 0001193125-26-254731

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260603

**DATE AS OF CHANGE**: 20260603

**EFFECTIVENESS DATE**: 20260603

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AIM INVESTMENT SECURITIES FUNDS (INVESCO INVESTMENT SECURITIES FUNDS)
- **CENTRAL INDEX KEY:** 0000842790

**ORGANIZATION NAME:**
- **EIN:** 760343427
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0228

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-39519
- **FILM NUMBER:** 261059203

**BUSINESS ADDRESS:**
- **STREET 1:** 11 GREENWAY PLAZA
- **STREET 2:** SUITE 1000
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 7136261919

**MAIL ADDRESS:**
- **STREET 1:** 11 GREENWAY PLAZA
- **STREET 2:** SUITE 1000
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM INVESTMENT SECURITIES FUNDS
- **DATE OF NAME CHANGE:** 20000921

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM INVESTMENT SECURITIES FUNDS INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM PRIME RATE PREMIUM INCOME FUND INC
- **DATE OF NAME CHANGE:** 19910320

## Series and Classes Contracts Data

### INVESCO CORPORATE BOND FUND (Series ID: S000027851)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000084553 | CLASS C      | ACCEX           |
| C000084554 | CLASS Y      | ACCHX           |
| C000084555 | CLASS R5     | ACCWX           |
| C000084556 | CLASS A      | ACCBX           |
| C000095838 | Class R      | ACCZX           |
| C000120680 | Class R6     | ICBFX           |

**SUPPLEMENT DATED JUNE 3, 2026 TO THE CURRENT** <br>**SUMMARY PROSPECTUS, STATUTORY PROSPECTUS AND STATEMENT OF ADDITIONAL INFORMATION FOR:**

**Invesco Corporate Bond Fund**

(the "Fund")

This supplement amends the Summary Prospectus, Statutory Prospectus and Statement of Additional Information ("SAI") of the above referenced Fund and is in addition to any other supplement(s), unless otherwise specified. *You should read this supplement in conjunction with the Summary Prospectus, Statutory Prospectus and SAI and retain it for future reference.*

**Effective June 3, 2026:**

1. The following information replaces in its entirety the table appearing under the heading "**Management of the Fund**" in the Summary and Statutory Prospectuses:

---

| | | |
|:---|:---|:---|
| **Portfolio Managers** | **Title** | **Length of Service on the Fund** |
| Matthew Brill, CFA | Portfolio Manager | 2013 |
| Chuck Burge | Portfolio Manager | 2010 |
| Michael Hyman | Portfolio Manager | 2013 |
| Todd Schomberg, CFA | Portfolio Manager | 2019 |

---

2. The following information replaces in its entirety the information appearing under the heading **"Fund Management – Portfolio Managers"** in the Statutory Prospectuses:

The following individuals are jointly and primarily responsible for the day-to-day management of the Fund's portfolio:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;▪ Matthew Brill, CFA, Portfolio Manager, who has been responsible for the Fund since 2013 and has been associated with Invesco and/or its affiliates since 2013.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;▪ Chuck Burge, Portfolio Manager, who has been responsible for the Fund since 2010 and has been associated with Invesco and/or its affiliates since 2002.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;▪ Michael Hyman, Portfolio Manager, who has been responsible for the Fund since 2013 and has been associated with Invesco and/or its affiliates since 2013.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;▪ Todd Schomberg, CFA, Portfolio Manager, who has been responsible for the Fund since 2019 and has been associated with Invesco and/or its affiliates since 2016.

More information on the portfolio managers may be found at www.invesco.com/us. The website is not part of this prospectus.

The Fund's SAI provides additional information about the portfolio managers' investments in the Fund, a description of the compensation structure and information regarding other accounts managed.

3. Niklas Nordenfelt will no longer serve as a Portfolio Manager of the Fund. All references to Mr. Nordenfelt in the Summary and Statutory Prospectuses and SAI are hereby removed.

VK-CBD-SUMSTATSAI-SUP 060326

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