# EDGAR Filing Document

**Accession Number:** 0001225290
**File Stem:** 0001193125-26-158642
**Filing Date:** 2026-4
**Character Count:** 18906
**Document Hash:** fdc4b1798eb12e5ce658877e114d6cf1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-158642.hdr.sgml**: 20260416

**ACCESSION NUMBER**: 0001193125-26-158642

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260416

**DATE AS OF CHANGE**: 20260416

**EFFECTIVENESS DATE**: 20260416

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** UBS Series Funds
- **CENTRAL INDEX KEY:** 0001060517

**ORGANIZATION NAME:**
- **EIN:** 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:** 26866784

**BUSINESS ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) LLC
- **STREET 2:** 1285 AVENUE OF THE AMERICAS
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10019
- **BUSINESS PHONE:** 212-821-3000

**MAIL ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) LLC
- **STREET 2:** 1285 AVENUE OF THE AMERICAS
- **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
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SMA RELATIONSHIP TRUST
- **CENTRAL INDEX KEY:** 0001225290

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-104218
- **FILM NUMBER:** 26866785

**BUSINESS ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) INC
- **STREET 2:** ONE NORTH WACKER DR.
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 312-525-7100

**MAIL ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) INC
- **STREET 2:** ONE NORTH WACKER DR.
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** UBS INVESTMENT TRUST
- **CENTRAL INDEX KEY:** 0000873803

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

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-39659
- **FILM NUMBER:** 26866787

**BUSINESS ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) LLC
- **STREET 2:** 1285 AVENUE OF THE AMERICAS
- **CITY:** NEW YORK
- **STATE:** NY
- **BUSINESS PHONE:** 212-821-3000

**MAIL ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) LLC
- **STREET 2:** 1285 AVENUE OF THE AMERICAS
- **CITY:** NEW YORK
- **STATE:** NY

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BRINSON INVESTMENT TRUST
- **DATE OF NAME CHANGE:** 20010625

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PAINEWEBBER INVESTMENT TRUST
- **DATE OF NAME CHANGE:** 19960511

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KIDDER PEABODY INVESTMENT TRUST
- **DATE OF NAME CHANGE:** 19920929
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** UBS FUNDS
- **CENTRAL INDEX KEY:** 0000886244

**ORGANIZATION NAME:**
- **EIN:** 367056204
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-47287
- **FILM NUMBER:** 26866786

**BUSINESS ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) INC
- **STREET 2:** ONE NORTH WACKER DR.
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 312-525-7100

**MAIL ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) INC
- **STREET 2:** ONE NORTH WACKER DR.
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BRINSON FUNDS INC
- **DATE OF NAME CHANGE:** 19920929

## Series and Classes Contracts Data

### UBS U.S. Allocation Fund (Series ID: S000002487)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class A    | PWTAX         | C000006689 |
| Class P    | PWTYX         | C000006692 |

---

### UBS GLOBAL ALLOCATION FUND (Series ID: S000002979)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| CLASS A    | BNGLX         | C000008182 |
| CLASS P    | BPGLX         | C000008185 |

---

### UBS International Sustainable Equity Fund (Series ID: S000002980)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| CLASS A    | BNIEX         | C000008186 |
| CLASS P    | BNUEX         | C000008189 |
| Class P2   | ESPTX         | C000222877 |

---

### UBS Emerging Markets Equity Opportunity Fund (Series ID: S000003134)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| CLASS A    | UEMAX         | C000008499 |
| CLASS P    | UEMPX         | C000008502 |
| CLASS P2   | EMPTX         | C000200986 |

---

### UBS Multi Income Bond Fund (Series ID: S000053041)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class A    | UTBAX         | C000166868 |
| Class P    | UTBPX         | C000166870 |
| Class P2   | UTBTX         | C000237722 |

---

### UBS Engage For Impact Fund (Series ID: S000063381)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class P    | UEIPX         | C000205441 |
| Class A    | UEIAX         | C000205442 |
| Class P2   | EIPTX         | C000225935 |

---

### UBS Sustainable Development Bank Bond Fund (Series ID: S000063382)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class P2   | UDBTX         | C000205443 |
| Class P    | UDBPX         | C000205444 |
| Class A    | UDBAX         | C000205445 |

---

### UBS US Dividend Ruler Fund (Series ID: S000068969)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class P    | DVRUX         | C000220414 |
| Class P2   | DVRPX         | C000241422 |

---

### UBS US Quality Growth At Reasonable Price Fund (Series ID: S000068970)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class P    | QGRPX         | C000220415 |

---

### UBS Select Treasury Institutional Fund (Series ID: S000002682)

---

|  |  |  |
|:---|:---|:---|
| Class Name                             | Ticker Symbol | Class ID   |
| UBS Select Treasury Institutional Fund | SETXX         | C000007334 |

---

### UBS Liquid Assets Government Fund (Series ID: S000002684)

---

|  |  |
|:---|:---|
| Class Name                        | Class ID   |
| UBS Liquid Assets Government Fund | C000007336 |

---

### UBS Select Treasury Preferred Fund (Series ID: S000018677)

---

|  |  |  |
|:---|:---|:---|
| Class Name                         | Ticker Symbol | Class ID   |
| UBS Select Treasury Preferred Fund | STPXX         | C000051800 |

---

### UBS Prime Reserves Fund (Series ID: S000052306)

---

|  |  |  |
|:---|:---|:---|
| Class Name              | Ticker Symbol | Class ID   |
| UBS Prime Reserves Fund | UPRXX         | C000164452 |

---

### UBS Prime Preferred Fund (Series ID: S000052307)

---

|  |  |  |
|:---|:---|:---|
| Class Name               | Ticker Symbol | Class ID   |
| UBS Prime Preferred Fund | UPPXX         | C000164453 |

---

### UBS Select Government Institutional Fund (Series ID: S000053131)

---

|  |  |  |
|:---|:---|:---|
| Class Name                               | Ticker Symbol | Class ID   |
| UBS Select Government Institutional Fund | SEGXX         | C000167199 |

---

### UBS Select Government Preferred Fund (Series ID: S000053132)

---

|  |  |  |
|:---|:---|:---|
| Class Name                           | Ticker Symbol | Class ID   |
| UBS Select Government Preferred Fund | SGPXX         | C000167200 |

---

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

---

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

---

### UBS Ultra Short Income Fund (Series ID: S000061955)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class A    | USIAX         | C000200717 |
| Class P    | USIPX         | C000200718 |
| Class I    | USDIX         | C000200719 |

---

### UBS Select 100% US Treasury Institutional Fund (Series ID: S000084282)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Institutional Shares | SIOXX         | C000248579 |
| Token-Enabled Shares | TOKXX         | C000271489 |

---

### UBS Select 100% US Treasury Preferred Fund (Series ID: S000084283)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class P    | STAXX         | C000248580 |
| Class T    | SOPXX         | C000250059 |

---

### Series M (Series ID: S000002663)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Series M   | SRTMX         | C000007298 |

---

## Series and Classes Contracts Data

### UBS U.S. Allocation Fund (Series ID: S000002487)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000006689 | Class A      | PWTAX           |
| C000006692 | Class P      | PWTYX           |

### UBS GLOBAL ALLOCATION FUND (Series ID: S000002979)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000008182 | CLASS A      | BNGLX           |
| C000008185 | CLASS P      | BPGLX           |

### UBS International Sustainable Equity Fund (Series ID: S000002980)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000008186 | CLASS A      | BNIEX           |
| C000008189 | CLASS P      | BNUEX           |
| C000222877 | Class P2     | ESPTX           |

### UBS Emerging Markets Equity Opportunity Fund (Series ID: S000003134)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000008499 | CLASS A      | UEMAX           |
| C000008502 | CLASS P      | UEMPX           |
| C000200986 | CLASS P2     | EMPTX           |

### UBS Multi Income Bond Fund (Series ID: S000053041)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000166868 | Class A      | UTBAX           |
| C000166870 | Class P      | UTBPX           |
| C000237722 | Class P2     | UTBTX           |

### UBS Engage For Impact Fund (Series ID: S000063381)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000205441 | Class P      | UEIPX           |
| C000205442 | Class A      | UEIAX           |
| C000225935 | Class P2     | EIPTX           |

### UBS Sustainable Development Bank Bond Fund (Series ID: S000063382)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000205443 | Class P2     | UDBTX           |
| C000205444 | Class P      | UDBPX           |
| C000205445 | Class A      | UDBAX           |

### UBS US Dividend Ruler Fund (Series ID: S000068969)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000220414 | Class P      | DVRUX           |
| C000241422 | Class P2     | DVRPX           |

### UBS US Quality Growth At Reasonable Price Fund (Series ID: S000068970)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000220415 | Class P      | QGRPX           |

### UBS Select Treasury Institutional Fund (Series ID: S000002682)

| Class ID   | Class Name                             | Ticker Symbol   |
|:---|:---|:---|
| C000007334 | UBS Select Treasury Institutional Fund | SETXX           |

### UBS Liquid Assets Government Fund (Series ID: S000002684)

| Class ID   | Class Name                        | Ticker Symbol   |
|:---|:---|:---|
| C000007336 | UBS Liquid Assets Government Fund |  |

### UBS Select Treasury Preferred Fund (Series ID: S000018677)

| Class ID   | Class Name                         | Ticker Symbol   |
|:---|:---|:---|
| C000051800 | UBS Select Treasury Preferred Fund | STPXX           |

### UBS Prime Reserves Fund (Series ID: S000052306)

| Class ID   | Class Name              | Ticker Symbol   |
|:---|:---|:---|
| C000164452 | UBS Prime Reserves Fund | UPRXX           |

### UBS Prime Preferred Fund (Series ID: S000052307)

| Class ID   | Class Name               | Ticker Symbol   |
|:---|:---|:---|
| C000164453 | UBS Prime Preferred Fund | UPPXX           |

### UBS Select Government Institutional Fund (Series ID: S000053131)

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000167199 | UBS Select Government Institutional Fund | SEGXX           |

### UBS Select Government Preferred Fund (Series ID: S000053132)

| Class ID   | Class Name                           | Ticker Symbol   |
|:---|:---|:---|
| C000167200 | UBS Select Government Preferred Fund | SGPXX           |

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

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

### UBS Ultra Short Income Fund (Series ID: S000061955)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000200717 | Class A      | USIAX           |
| C000200718 | Class P      | USIPX           |
| C000200719 | Class I      | USDIX           |

### UBS Select 100% US Treasury Institutional Fund (Series ID: S000084282)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000248579 | Institutional Shares | SIOXX           |
| C000271489 | Token-Enabled Shares | TOKXX           |

### UBS Select 100% US Treasury Preferred Fund (Series ID: S000084283)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000248580 | Class P      | STAXX           |
| C000250059 | Class T      | SOPXX           |

### Series M (Series ID: S000002663)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000007298 | Series M     | SRTMX           |

![LOGO](g2812827mm_k.jpg)

April 16, 2026

**Supplement to the Statements of Additional Information (each, an "SAI" and together, the "SAIs") and Part Bs referenced further below, as may have been supplemented.** 

**Includes:** 

• UBS Series Funds

• Master Trust

• UBS Investment Trust

• The UBS Funds

• SMA Relationship Trust

Dear Investor,

The purpose of this supplement is to update certain information in the SAIs and Part Bs, as applicable, for the above-named investment trusts, including each series thereof (each, a "Trust" and together, the "Trusts") regarding changes to the officers of the Trusts.

**Effective immediately, each SAI and Part B is hereby revised as follows:** 

**All references to Joanne Kilkeary, who has retired from UBS AM, in each SAI and Part B are deleted in their entirety.** 

**The section captioned "Organization of the trust; trustees and officers; principal holders and management ownership of securities" or "Item 17. Management of the Fund[s]", as applicable, is revised by replacing the first row of the table titled "Officers" in its entirety with the following:** 

---

| | | | |
|:---|:---|:---|:---|
| Rose Ann Bubloski<sup>^</sup>;<br>1968 | Vice President, Treasurer, Chief Financial Officer, and Principal Accounting Officer | Since 2011 (Vice President); since March 2026 (Treasurer, Chief Financial Officer, and Principal Accounting Officer) | Ms. Bubloski is a director (since 2012) (prior to which she was an associate director (from 2008 to 2012)) and a senior manager of fund accounting—US (previously named product control and investment support) of UBS Asset Management (Americas) LLC and/or UBS Asset Management (US) Inc. ("UBS AM—Americas region"). Ms. Bubloski is vice president, treasurer, chief financial officer, and principal accounting officer of 9 investment companies (consisting of 46 portfolios) for which UBS AM serves as investment advisor or manager. |

---

ZS-1301

------

**The same section of the SAI is further revised by adding the following as the fourth and fifth rows of the table titled "Officers":** 

---

| | | | |
|:---|:---|:---|:---|
| Nicole Lin<sup>^</sup>; 1980 | Vice President and Assistant Treasurer | Since March 2026 | Ms. Lin is a senior fund accountant for UBS AM (since 2024). Prior to joining UBS AM, Ms. Lin worked as an officer at State Street. Ms. Lin is a vice president and assistant treasurer of 6 investment companies (consisting of 42 portfolios) for which UBS AM serves as investment advisor or manager. |
| John Loubnan<sup>†</sup>; 1993 | Vice President and Assistant Treasurer | Since March 2026 | Mr. Loubnan is a senior fund accountant for UBS AM (since 2020). Prior to joining UBS AM, Mr. Loubnan worked as a senior fund accountant at The Bank of New York Mellon. Mr. Loubnan is a vice president and assistant treasurer of 6 investment companies (consisting of 42 portfolios) for which UBS AM serves as investment advisor or manager. |

---

^ This person's business address is 1000 Harbor Boulevard, Weehawken, NJ 07086.

<sup>†</sup> This person's business address is 1285 Avenue of the Americas, New York, NY 10019.

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

------

**This supplement relates to each of the following SAIs/Part Bs:** 

---

| | |
|:---|:---|
| **Fund Name** | **Date of<br>SAI/Part B** |
| **UBS Series Funds—**UBS Select Government Institutional Fund, UBS Select Treasury Institutional Fund, UBS Select 100% US Treasury Institutional Fund, UBS Select Government Preferred Fund, UBS Select Treasury Preferred Fund, UBS Select 100% US Treasury Preferred Fund, UBS Prime Preferred Fund, UBS Prime Reserves Fund | January 26, 2026 for Token-Enabled<br>Shares of UBS Select 100% US<br>Treasury Institutional Fund, and<br>August 28, 2025, as revised<br>January 26, 2026 for each other<br>fund and share class |
| **UBS Series Funds—**UBS Liquid Assets Government Fund | August 28, 2025 |
| **UBS Series Funds—**UBS RMA Government Money Market Fund | August 28, 2025 |
| **UBS Series Funds—**UBS Ultra Short Income Fund | August 28, 2025 |
| **UBS Series Funds—**Limited Purpose Cash Investment Fund | August 22, 2025, as revised<br>November 14, 2025 |
| **Master Trust—**Government Master Fund, Treasury Master Fund, 100% US Treasury Master Fund, Prime CNAV Master Fund | August 22, 2025 |
| **UBS Investment Trust—**UBS U.S. Allocation Fund | December 29, 2025 |
| **UBS Funds—**UBS Emerging Markets Equity Opportunity Fund, UBS Engage For Impact Fund, UBS Global Allocation Fund, UBS International Sustainable Equity Fund, UBS Multi Income Bond Fund, UBS Sustainable Development Bank Bond Fund, UBS US Dividend Ruler Fund, UBS US Quality Growth At Reasonable Price Fund | October 28, 2025 |
| **SMA Relationship Trust—**Series M | April 30, 2025 |

---