# EDGAR Filing Document

**Accession Number:** 0000809593
**File Stem:** 0001133228-26-007770
**Filing Date:** 2026-5
**Character Count:** 4290
**Document Hash:** 6ade316d3a4eb27124f20e01ed8c7bac
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-26-007770.hdr.sgml**: 20260501

**ACCESSION NUMBER**: 0001133228-26-007770

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260501

**DATE AS OF CHANGE**: 20260501

**EFFECTIVENESS DATE**: 20260501

**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:** 26929885

**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 DoubleLine Floating Rate Fund (Series ID: S000052009)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| A Class        | SOUAX         | C000163584 |
| C Class        | SOUCX         | C000163585 |
| R5 Class       | SPFLX         | C000163586 |
| Investor Class | SPFPX         | C000163587 |
| Y Class        | SPFYX         | C000163588 |

---

### American Beacon DoubleLine Select Income Fund (Series ID: S000097955)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| Investor Class | BILTX         | C000267489 |
| Y Class        | BILDX         | C000267490 |
| R6 Class       | BILRX         | C000269735 |

---

## Series and Classes Contracts Data

### American Beacon DoubleLine Floating Rate Fund (Series ID: S000052009)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000163584 | A Class        | SOUAX           |
| C000163585 | C Class        | SOUCX           |
| C000163586 | R5 Class       | SPFLX           |
| C000163587 | Investor Class | SPFPX           |
| C000163588 | Y Class        | SPFYX           |

### American Beacon DoubleLine Select Income Fund (Series ID: S000097955)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000267489 | Investor Class | BILTX           |
| C000267490 | Y Class        | BILDX           |
| C000269735 | R6 Class       | BILRX           |

![](logo_001.jpg)

**American Beacon DoubleLine Select Income Fund**

**American Beacon DoubleLine Floating Rate Fund**

<br> Supplement dated May 1, 2026, to the Prospectus dated February 23, 2026, as previously amended or supplemented

On page 45 of the Prospectus, under the heading **"Fund Management - The Manager,"** the paragraph preceding the sub-heading "Contractual Expense Limitations," is deleted in its entirety and replaced with the following:

A discussion of the Board's consideration and approval of the Management Agreement between the Trust, on behalf of the American Beacon DoubleLine Floating Rate Fund, and the Manager and the Investment Advisory Agreement among the Trust, on behalf of the American Beacon DoubleLine Floating Rate Fund, the sub-advisor and the Manager is available in Item 11 of the American Beacon DoubleLine Floating Rate Fund's Form N-CSR as filed with the SEC for the fiscal year ended August 31, 2025. A discussion of the Board's consideration and approval of the Management Agreement between the Trust, on behalf of the American Beacon DoubleLine Select Income Fund, and the Manager and the Investment Advisory Agreement among the Trust, on behalf of the American Beacon DoubleLine Select Income Fund, the sub-advisor and the Manager will be available in Item 11 of the American Beacon DoubleLine Select Income Fund's Form N-CSR as filed with the SEC for the fiscal year ended March 31, 2026.

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PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

20260501-DLSI-PRO