# EDGAR Filing Document

**Accession Number:** 0000809593
**File Stem:** 0001133228-26-000301
**Filing Date:** 2026-1
**Character Count:** 5212
**Document Hash:** 78b0460656cec6daa1cee0d0bd71077c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-26-000301.hdr.sgml**: 20260113

**ACCESSION NUMBER**: 0001133228-26-000301

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260113

**DATE AS OF CHANGE**: 20260113

**EFFECTIVENESS DATE**: 20260113

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AMERICAN BEACON FUNDS
- **CENTRAL INDEX KEY:** 0000809593

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-11387
- **FILM NUMBER:** 26528618

**BUSINESS ADDRESS:**
- **STREET 1:** 220 EAST LAS COLINAS BOULEVARD
- **STREET 2:** SUITE 1200
- **CITY:** IRVING
- **STATE:** TX
- **ZIP:** 75039
- **BUSINESS PHONE:** 8173916100

**MAIL ADDRESS:**
- **STREET 1:** 220 EAST LAS COLINAS BOULEVARD
- **STREET 2:** SUITE 1200
- **CITY:** IRVING
- **STATE:** TX
- **ZIP:** 75039

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMERICAN AADVANTAGE FUNDS
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMERICAN EAGLE FUNDS
- **DATE OF NAME CHANGE:** 19890813

## Series and Classes Contracts Data

### American Beacon Stephens Small Cap Growth Fund (Series ID: S000035895)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| A Class        | SPWAX         | C000110026 |
| C Class        | SPWCX         | C000110027 |
| R5 Class       | STSIX         | C000110028 |
| Y Class        | SPWYX         | C000110029 |
| Investor Class | STSGX         | C000110030 |
| R6 Class       | STSRX         | C000213181 |

---

### American Beacon Stephens Mid-Cap Growth Fund (Series ID: S000035896)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| Investor Class | STMGX         | C000110031 |
| A Class        | SMFAX         | C000110032 |
| C Class        | SMFCX         | C000110033 |
| R5 Class       | SFMIX         | C000110034 |
| Y Class        | SMFYX         | C000110035 |
| R6 Class       | SFMRX         | C000210485 |

---

## Series and Classes Contracts Data

### American Beacon Stephens Small Cap Growth Fund (Series ID: S000035895)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000110026 | A Class        | SPWAX           |
| C000110027 | C Class        | SPWCX           |
| C000110028 | R5 Class       | STSIX           |
| C000110029 | Y Class        | SPWYX           |
| C000110030 | Investor Class | STSGX           |
| C000213181 | R6 Class       | STSRX           |

### American Beacon Stephens Mid-Cap Growth Fund (Series ID: S000035896)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000110031 | Investor Class | STMGX           |
| C000110032 | A Class        | SMFAX           |
| C000110033 | C Class        | SMFCX           |
| C000110034 | R5 Class       | SFMIX           |
| C000110035 | Y Class        | SMFYX           |
| C000210485 | R6 Class       | SFMRX           |

**American Beacon Stephens Mid-Cap Growth Fund<br> American Beacon Stephens Small Cap Growth Fund**

**Supplement dated January 13, 2026 to the**

**Statement of Additional Information dated May 1, 2025**

*On December 31, 2025, Warren Stephens transferred 75% of his voting interests in Stephens Investment Management Group, LLC ("Stephens" or "the Sub-Advisor"), the sub-advisor to the American Beacon Stephens Mid-Cap Growth Fund and the American Beacon Stephens Small Cap Growth Fund (collectively, the "Funds"), in equal shares, to trusts controlled by each of the following: Miles Stephens, John Stephens, and Laura Brookshire (the "Transaction"). Mr. Stephens continues to retain 25% of the voting interests in Stephens and his other interests in Stephens and Stephens Investments Holdings LLC, the parent company of Stephens. Following the Transaction, no owner of the Sub-Advisor owns more than 25% of the outstanding voting interests, and therefore such owners are presumed not to be control persons. Therefore, effective immediately, the following changes are made to the Funds' Statement of Additional Information:*

On pages 26-27 of the Statement of Additional Information, under the heading **"Investment Advisory Agreement,"** the first paragraph and the table are deleted in their entirety and replaced with the following:

The Funds' sub-advisor is Stephens Investment Management Group, LLC ("Stephens"). According to the Investment Company Act, a person or entity with control with respect to an investment advisor has "the power to exercise a controlling influence over the management or policies of a company, unless such power is solely the result of an official position with such company." No owner of Stephens owns more than 25% of the outstanding voting interests of Stephens, and therefore such owners are presumed not to be control persons. Persons and entities affiliated with the sub-advisor may be considered affiliates of the Funds.

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PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

20260113-STEPHENS-SAI