# EDGAR Filing Document

**Accession Number:** 0000892538
**File Stem:** 0001193125-25-217228
**Filing Date:** 2025-9
**Character Count:** 3832
**Document Hash:** 0111bd7c38bdbc109cced7c4b8ab3ae7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-217228.hdr.sgml**: 20250925

**ACCESSION NUMBER**: 0001193125-25-217228

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250925

**DATE AS OF CHANGE**: 20250925

**EFFECTIVENESS DATE**: 20250925

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SUNAMERICA SERIES TRUST
- **CENTRAL INDEX KEY:** 0000892538

**ORGANIZATION NAME:**
- **EIN:** 137002445
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0131

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-52742
- **FILM NUMBER:** 251342856

**BUSINESS ADDRESS:**
- **STREET 1:** 21650 OXNARD STREET, 10TH FLOOR
- **CITY:** WOODLAND HILLS
- **STATE:** CA
- **ZIP:** 91367
- **BUSINESS PHONE:** 551-235-3560

**MAIL ADDRESS:**
- **STREET 1:** 30 HUDSON STREET
- **STREET 2:** 16TH FLOOR
- **CITY:** JERSEY CITY
- **STATE:** NJ
- **ZIP:** 07302

## Series and Classes Contracts Data

### SA Fixed Income Index Portfolio (Series ID: S000056256)

---

|  |  |
|:---|:---|
| Class Name | Class ID   |
| Class 1    | C000177069 |
| Class 3    | C000177070 |

---

### SA Fixed Income Intermediate Index Portfolio (Series ID: S000059206)

---

|  |  |
|:---|:---|
| Class Name | Class ID   |
| Class 1    | C000193973 |
| Class 3    | C000193974 |

---

## Series and Classes Contracts Data

### SA Fixed Income Index Portfolio (Series ID: S000056256)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000177069 | Class 1      |  |
| C000177070 | Class 3      |  |

### SA Fixed Income Intermediate Index Portfolio (Series ID: S000059206)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000193973 | Class 1      |  |
| C000193974 | Class 3      |  |

**Filed under Rule 497(e)** 

**Registration No. 33-52742** 

**SunAmerica Series Trust** 

SA Fixed Income Index Portfolio

SA Fixed Income Intermediate Index Portfolio

(the "Portfolios" and each, a "Portfolio")

Supplement dated September 25, 2025

to the Portfolios' Statement of Additional Information ("SAI")

dated May 1, 2025, as supplemented and amended to date

Effective immediately, in the table under the section entitled "**PORTFOLIO MANAGERS – Other Accounts**," in the section pertaining to BlackRock Investment Management, LLC ("BlackRock"), the information pertaining to Karen Uyehara is hereby deleted and replaced with the following:

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Adviser/<br> Subadviser | Portfolio Managers | **Other Accounts**<br> (As of June 30, 2025) | **Other Accounts**<br> (As of June 30, 2025) | **Other Accounts**<br> (As of June 30, 2025) | **Other Accounts**<br> (As of June 30, 2025) | **Other Accounts**<br> (As of June 30, 2025) | **Other Accounts**<br> (As of June 30, 2025) |
| &nbsp;&nbsp;&nbsp; Adviser/<br> Subadviser | Portfolio Managers | <br> Registered Investment Companies | <br> Registered Investment Companies | <br> Pooled Investment Vehicles | <br> Pooled Investment Vehicles | <br> Other Accounts | <br> Other Accounts |
| &nbsp;&nbsp;&nbsp; Adviser/<br> Subadviser | Portfolio Managers | <br> No. of Accounts<br>| <br> Assets (in<br>millions)<br>| <br> No. of<br>Accounts<br>| <br> Total Assets<br>(in millions)<br>| <br> No. of<br>Accounts<br>| <br> Total Assets<br>(in millions)<br>|
| &nbsp;&nbsp;&nbsp;&nbsp; <br>BlackRock<br>| <br> Graves, Jonathan<br>Tom, Marcus<br>| <br> 30<br> 6<br>| <br> $108.0 Billion<br> $61.86 Billion<br>| <br> 71<br> 11<br>| <br> $29.44 Billion<br> $47.80 Billion<br>| <br> 10<br> 6<br>| <br> $3.39 Billion<br> $2.98 Billion<br>|

---

Capitalized terms used but not defined herein shall have the meanings assigned to them by the SAI.

**PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE.** 

SASTSAI-SUP2.4