# EDGAR Filing Document

**Accession Number:** 0001060517
**File Stem:** 0001193125-23-048654
**Filing Date:** 2023-2
**Character Count:** 2933
**Document Hash:** 0c7ee0a3f19818bf229b67fa628abe3b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-048654.hdr.sgml**: 20230224

**ACCESSION NUMBER**: 0001193125-23-048654

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230224

**DATE AS OF CHANGE**: 20230224

**EFFECTIVENESS DATE**: 20230224

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** UBS Series Funds
- **CENTRAL INDEX KEY:** 0001060517
- **IRS NUMBER:** 134010447
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-52965
- **FILM NUMBER:** 23666433

**BUSINESS ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) INC
- **STREET 2:** 787 SEVENTH AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10019
- **BUSINESS PHONE:** 212-821-3000

**MAIL ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) INC
- **STREET 2:** 787 SEVENTH AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10019

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** UBS MONEY SERIES
- **DATE OF NAME CHANGE:** 20020716

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BRINSON MONEY SERIES
- **DATE OF NAME CHANGE:** 20010625

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MITCHELL HUTCHINS LIR MONEY SERIES
- **DATE OF NAME CHANGE:** 19990730

## Series and Classes Contracts Data

### UBS RMA Government Money Market Fund (Series ID: S000053134)

---

|  |  |  |
|:---|:---|:---|
| Class Name                           | Ticker Symbol | Class ID   |
| UBS RMA Government Money Market Fund | RMGXX         | C000167202 |

---

## Series and Classes Contracts Data

### UBS RMA Government Money Market Fund (Series ID: S000053134)

| Class ID   | Class Name                           | Ticker Symbol   |
|:---|:---|:---|
| C000167202 | UBS RMA Government Money Market Fund | RMGXX           |

![LOGO](g2813697mm_k.jpg)

## UBS Series Funds
February 24, 2023

**Supplement to the Prospectus dated August 29, 2022, as supplemented.** 

**Includes:** 

• UBS RMA Government Money Market Fund

Dear Investor,

The purpose of this supplement is to update certain information contained in the prospectus for UBS RMA Government Money Market Fund regarding an extension of the voluntary fee waiver through March 31, 2023. This disclosure change will become effective March 1, 2023 ("Effective Date").

The prospectus is hereby supplemented as shown below.

**On the Effective Date, the section captioned "Management" and sub-captioned "Advisory and administration fees" beginning on page 19 of the prospectus is revised by replacing the first sentence of the fourth paragraph of that section with the following:** 

UBS AM will voluntarily waive 0.03% of its master fund level fee in order to voluntarily reduce UBS RMA Government Money Market Fund's expenses by 0.03% until March 31, 2023.

**PLEASE BE SURE TO RETAIN THIS IMPORTANT INFORMATION FOR FUTURE REFERENCE.** 

ZS-1214