# EDGAR Filing Document

**Accession Number:** 0001112996
**File Stem:** 0001193125-26-077957
**Filing Date:** 2026-2
**Character Count:** 3956
**Document Hash:** db21227a0465329d2b54b38e83101973
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-077957.hdr.sgml**: 20260227

**ACCESSION NUMBER**: 0001193125-26-077957

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260227

**DATE AS OF CHANGE**: 20260226

**EFFECTIVENESS DATE**: 20260227

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AIM COUNSELOR SERIES TRUST (INVESCO COUNSELOR SERIES TRUST)
- **CENTRAL INDEX KEY:** 0001112996

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0831

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-36074
- **FILM NUMBER:** 26691389

**BUSINESS ADDRESS:**
- **STREET 1:** 11 GREENWAY PLAZA
- **STREET 2:** SUITE 1000
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 713-626-1919

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM COUNSELOR SERIES TRUST
- **DATE OF NAME CHANGE:** 20040322

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM COUNSELOR SERIES FUNDS
- **DATE OF NAME CHANGE:** 20031126

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM COUNSELOR SERIES FUNDS INC
- **DATE OF NAME CHANGE:** 20031001

## Series and Classes Contracts Data

### Invesco Discovery Fund (Series ID: S000064618)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000209175 | Class R5     |  |
| C000209176 | Class A      |  |
| C000209177 | Class Y      |  |
| C000209178 | Class R      |  |
| C000209179 | Class R6     |  |
| C000209180 | Class C      |  |

**SUPPLEMENT DATED FEBRUARY 27, 2026 TO THE CURRENT** <br>**SUMMARY PROSPECTUS AND STATUTORY PROSPECTUS FOR:**

**Invesco Discovery Fund**

(the "Fund")

This supplement amends the Summary Prospectus and Statutory Prospectus of the above referenced Fund and is in addition to any other supplement(s). *You should read this supplement in conjunction with the Summary Prospectus and Statutory Prospectus and retain it for future reference.*

**Effective February 27, 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** |
| Ronald J. Zibelli, Jr., CFA | Portfolio Manager (Lead) | 2019 (predecessor fund 2006) |
| Justin Livengood, CFA | Portfolio Manager | 2026 |
| Ash Shah, CFA | Portfolio Manager | 2019 (predecessor fund 2014) |

---

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;▪ Ronald J. Zibelli, Jr., CFA, Portfolio Manager (Lead), who has been responsible for the Fund since 2019 and has been associated with Invesco and/or its affiliates since 2019. Prior to the commencement of the Fund's operations, Mr. Zibelli managed the predecessor fund since 2006 and was associated with OppenheimerFunds, a global asset management firm, since 2006.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;▪ Justin Livengood, CFA, Portfolio Manager, who has been responsible for the Fund since 2026 and has been associated with Invesco and/or its affiliates since 2019. From 2006 to 2019, Mr. Livengood was associated with OppenheimerFunds, a global asset management firm.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;▪ Ash Shah, CFA, Portfolio Manager, who has been responsible for the Fund since 2019 and has been associated with Invesco and/or its affiliates since 2019. Prior to the commencement of the Fund's operations, Mr. Shah managed the predecessor fund since 2014 and was associated with OppenheimerFunds, a global asset management firm, since 2006.

O-DIS-SUMSTAT-SUP

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