# EDGAR Filing Document

**Accession Number:** 0000842790
**File Stem:** 0001104659-26-011306
**Filing Date:** 2026-2
**Character Count:** 5181
**Document Hash:** 66a64d5995376ca2780e4a6431c9ce41
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-011306.hdr.sgml**: 20260206

**ACCESSION NUMBER**: 0001104659-26-011306

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260206

**DATE AS OF CHANGE**: 20260206

**EFFECTIVENESS DATE**: 20260206

**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:** 26605622

**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 Income Fund (Series ID: S000000251)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000000601 | Class A        | AGOVX           |
| C000000603 | Class C        | AGVCX           |
| C000000604 | Class R        | AGVRX           |
| C000000605 | Investor Class | AGIVX           |
| C000029663 | CLASS R5       | AGOIX           |
| C000071212 | Class Y        | AGVYX           |
| C000188949 | Class R6       |  |

**SUPPLEMENT DATED FEBRUARY 6, 2026 TO THE CURRENT** <br>**SUMMARY AND STATUTORY PROSPECTUSES FOR:**

**Invesco Income Fund**

(the "Fund")

This supplement amends the Summary and Statutory Prospectuses 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 and Statutory Prospectuses and retain it for future reference.*

Effective February 6, 2026, the Average Annual Total Returns table appearing under the heading **"Performance Information"** in the prospectuses is replaced in its entirety as set forth below.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Average Annual Total Returns (for the periods ended December 31, 2024)** | **Average Annual Total Returns (for the periods ended December 31, 2024)** | **Average Annual Total Returns (for the periods ended December 31, 2024)** | **Average Annual Total Returns (for the periods ended December 31, 2024)** | **Average Annual Total Returns (for the periods ended December 31, 2024)** |
|  | &nbsp;&nbsp; **Inception** <br>**Date**<br>| &nbsp;&nbsp; **1** <br>**Year**<br>| &nbsp;&nbsp; **5** <br>**Years**<br>| &nbsp;&nbsp; **10** <br>**Years**<br>|
| Class A  | &nbsp;&nbsp; 4/28/1987 |  |  |  |
| Return Before Taxes |  | &nbsp;&nbsp; 2.98% | &nbsp;&nbsp; -1.08% | &nbsp;&nbsp; 0.45% |
| Return After Taxes on Distributions |  | 0.65 | &nbsp;&nbsp; -2.81 | &nbsp;&nbsp; -0.96 |
| Return After Taxes on Distributions and Sale of Fund Shares |  | 1.72 | &nbsp;&nbsp; -1.56 | &nbsp;&nbsp; -0.27 |
| Class C | &nbsp;&nbsp; 8/4/1997 | 5.54 | &nbsp;&nbsp; -0.96 | &nbsp;&nbsp; 0.29 |
| Class R | &nbsp;&nbsp; 6/3/2002 | 7.07 | &nbsp;&nbsp; -0.48 | &nbsp;&nbsp; 0.61 |
| Class Y  | &nbsp;&nbsp; 10/3/2008 | 7.76 | &nbsp;&nbsp; 0.05 | &nbsp;&nbsp; 1.13 |
| Investor Class | &nbsp;&nbsp; 9/30/2003 | 7.41 | &nbsp;&nbsp; -0.13 | &nbsp;&nbsp; 0.93 |
| Class R5 | &nbsp;&nbsp; 4/29/2005 | 7.69 | &nbsp;&nbsp; 0.13 | &nbsp;&nbsp; 1.23 |
| Class R6 | &nbsp;&nbsp; 4/4/2017 | 7.93 | &nbsp;&nbsp; 0.22 | 1.18<sup>1</sup> <br>|
| Bloomberg U.S. Securitized: MBS/ABS/CMBS Index (USD) (reflects no deduction for <br> fees, expenses or taxes)<sup>2</sup> <br>|  | 1.46 | &nbsp;&nbsp; -0.59 | &nbsp;&nbsp; 1.00 |
| Bloomberg U.S. Aggregate Intermediate Index (reflects no deduction for fees, <br> expenses or taxes)<sup>2</sup> <br>|  | 2.47 | &nbsp;&nbsp; 0.33 | &nbsp;&nbsp; 1.45 |
| Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or <br> taxes)<br>|  | 1.25 | &nbsp;&nbsp; -0.33 | &nbsp;&nbsp; 1.35 |

---

Performance shown prior to the inception date is that of the Fund's Class A shares at net asset value and includes the 12b-1 fees applicable to that class. Although invested in the same portfolio of securities, Class R6 shares' returns of the Fund will be different from Class A shares' returns of the Fund as they have different expenses.

Effective February 6, 2026, the Fund changed its style-specific benchmark from the Bloomberg U.S. Aggregate Intermediate Index to the Bloomberg U.S. Securitized: MBS/ABS/CMBS Index. The Fund believes the Bloomberg U.S. Securitized: MBS/ABS/CMBS Index is a more appropriate comparison for evaluating the Fund's performance.

INC-SUMSTAT-SUP 020626

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