# EDGAR Filing Document

**Accession Number:** 0001060517
**File Stem:** 0001410368-25-033525
**Filing Date:** 2025-12
**Character Count:** 13254
**Document Hash:** 3eb5d311dda0c270783e01b4215051f6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-033525.hdr.sgml**: 20251205

**ACCESSION NUMBER**: 0001410368-25-033525

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251130

**FILED AS OF DATE**: 20251205

**DATE AS OF CHANGE**: 20251205

**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:** N-MFP3
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-08767
- **FILM NUMBER:** 251552590

**BUSINESS ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) LLC
- **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) LLC
- **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 Select Government Preferred Fund (Series ID: S000053132)

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

# Form N-MFP3: Monthly Schedule of Portfolio Holdings

## N-MFP: Filer Information
**Submission Type:** N-MFP3
**CIK:** 0001060517

### General Information

**Report for (YYYY-MM-DD):** 2025-11-30

**Registrant Full Name:** UBS Series Funds

**CIK Number of Registrant:** 0001060517

**LEI of Registrant:** 54930058UKPXVB81RJ71

**Name of Series:** UBS Select Government Preferred Fund

**LEI of Series:** 549300TPU9BIV8MJY882

**EDGAR Series Identifier:** S000053132

**Total number of share classes in the series:** 1

**Is this the fund's final filing on Form N-MFP?:** No

**Has the fund acquired or merged with another fund?:** No

## Part A: Series-Level Information about the Fund

### Service Providers
| Role                          | Details                                                      | File/CIK Number   |
|:---|:---|:---|
| Investment Adviser            | UBS ASSET MANAGEMENT (AMERICAS) LLC                          | 801-34910         |
| Independent Public Accountant | Ernst & Young  LLP<br>City: New York<br>State: NY            |  |
| Administrator                 | UBS ASSET MANAGEMENT (AMERICAS) LLC                          |  |
| Transfer Agent                | BNY Mellon Investment Servicing (US) Inc.<br>CIK: 0000849542 | 084-01761         |

### Fund Characteristics & Assets

- **Securities Act File Number:** 333-52965

- **Is this a Feeder Fund?:** Yes

- **Is this a Master Fund?:** No

- **Is this series for insurance company separate accounts?:** No

- **Money Market Fund Category:** Government

- **Is this a Retail Money Market Fund?:** No

- **Is this a Government Money Market Fund?:** No

- **WAM:** 1 days

- **WAL:** 1 days

- **Total Value of Portfolio Securities:** $14803043935.40

- **Amortized Cost of Portfolio Securities:** $0.00

- **Cash:** $0.00

- **Total Other Assets:** $0.00

- **Total Liabilities:** $47960927.01

- **Net Assets of Series:** $14755083008.39

- **Number of Shares Outstanding (Series):** 14754405724.5000

- **Does the fund seek to maintain a stable price per share?:** Yes

- **Stable Price Per Share:** $1.00

- **Is cash management vehicle an affiliated fund?:** No

- **Does the fund apply liquidity fees?:** No

### Daily & Weekly Liquid Assets
| Date       | Daily Liquid Assets ($)   | Weekly Liquid Assets ($)   | Daily Liquid Assets (%)   | Weekly Liquid Assets (%)   |
|:---|:---|:---|:---|:---|
| 2025-11-03 | $20529149292.36           | $21729101228.89            | 76.1700%                  | 80.6300%                   |
| 2025-11-04 | $20140953257.18           | $21341033456.07            | 75.8200%                  | 80.3400%                   |
| 2025-11-05 | $20635442366.48           | $21835645545.66            | 76.2600%                  | 80.7000%                   |
| 2025-11-06 | $20361877404.29           | $21562255923.60            | 76.0100%                  | 80.5000%                   |
| 2025-11-07 | $20621500928.31           | $21943134072.74            | 76.2300%                  | 81.1200%                   |
| 2025-11-10 | $20621036744.00           | $21943149262.63            | 76.2300%                  | 81.1100%                   |
| 2025-11-11 | $0.00                     | $0.00                      | 0.0000%                   | 0.0000%                    |
| 2025-11-12 | $20653528969.15           | $21975810062.08            | 76.2500%                  | 81.1300%                   |
| 2025-11-13 | $20704040645.33           | $22026370409.36            | 76.2900%                  | 81.1700%                   |
| 2025-11-14 | $20452126878.12           | $21774568818.96            | 76.0600%                  | 80.9800%                   |
| 2025-11-17 | $20578950478.57           | $22024962975.23            | 75.9600%                  | 81.2900%                   |
| 2025-11-18 | $20542600300.10           | $21988762765.27            | 75.5500%                  | 80.8700%                   |
| 2025-11-19 | $20439407981.15           | $21885728288.69            | 75.2700%                  | 80.6000%                   |
| 2025-11-20 | $20708928164.28           | $22155362723.43            | 75.5100%                  | 80.7900%                   |
| 2025-11-21 | $20046531920.73           | $21493116855.03            | 74.8900%                  | 80.3000%                   |
| 2025-11-24 | $20402503999.65           | $22099023648.67            | 75.0500%                  | 81.2900%                   |
| 2025-11-25 | $20613718219.87           | $22185321477.37            | 75.5900%                  | 81.3500%                   |
| 2025-11-26 | $20404314226.75           | $21976160360.89            | 75.3900%                  | 81.2000%                   |
| 2025-11-28 | $20084181575.85           | $21656407265.70            | 75.0800%                  | 80.9600%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2025-11-03 | 4.1400%             |
| 2025-11-04 | 4.1200%             |
| 2025-11-05 | 4.1000%             |
| 2025-11-06 | 4.0900%             |
| 2025-11-07 | 4.0400%             |
| 2025-11-10 | 4.0300%             |
| 2025-11-11 | 0.0000%             |
| 2025-11-12 | 4.0300%             |
| 2025-11-13 | 4.0300%             |
| 2025-11-14 | 4.0300%             |
| 2025-11-17 | 4.0300%             |
| 2025-11-18 | 4.0300%             |
| 2025-11-19 | 4.0300%             |
| 2025-11-20 | 4.0200%             |
| 2025-11-21 | 4.0100%             |
| 2025-11-24 | 4.0100%             |
| 2025-11-25 | 4.0100%             |
| 2025-11-26 | 4.0200%             |
| 2025-11-28 | 4.0500%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2025-11-03 | 1.0002                      |
|  |  |
| 2025-11-04 | 1.0002                      |
|  |  |
| 2025-11-05 | 1.0002                      |
|  |  |
| 2025-11-06 | 1.0002                      |
|  |  |
| 2025-11-07 | 1.0001                      |
|  |  |
| 2025-11-10 | 1.0001                      |
|  |  |
| 2025-11-11 | 0.0000                      |
|  |  |
| 2025-11-12 | 1.0002                      |
|  |  |
| 2025-11-13 | 1.0001                      |
|  |  |
| 2025-11-14 | 1.0001                      |
|  |  |
| 2025-11-17 | 1.0001                      |
|  |  |
| 2025-11-18 | 1.0001                      |
|  |  |
| 2025-11-19 | 1.0001                      |
|  |  |
| 2025-11-20 | 1.0001                      |
|  |  |
| 2025-11-21 | 1.0001                      |
|  |  |
| 2025-11-24 | 1.0002                      |
|  |  |
| 2025-11-25 | 1.0002                      |
|  |  |
| 2025-11-26 | 1.0001                      |
|  |  |
| 2025-11-28 | 1.0001                      |
|  |  |

## Part B: Class-Level Information about the Fund

### Class: Basis A

- **Minimum Initial Investment:** $50000000.00

- **Net Assets of Class:** $14755083008.39

- **Number of Shares Outstanding:** 14754405724.5000

- **Expense Reimbursement/Waiver:** 456523.00

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0002          |
|  |  |
| 2025-11-04 | 1.0002          |
|  |  |
| 2025-11-05 | 1.0002          |
|  |  |
| 2025-11-06 | 1.0002          |
|  |  |
| 2025-11-07 | 1.0001          |
|  |  |
| 2025-11-10 | 1.0001          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0002          |
|  |  |
| 2025-11-13 | 1.0001          |
|  |  |
| 2025-11-14 | 1.0001          |
|  |  |
| 2025-11-17 | 1.0001          |
|  |  |
| 2025-11-18 | 1.0001          |
|  |  |
| 2025-11-19 | 1.0001          |
|  |  |
| 2025-11-20 | 1.0001          |
|  |  |
| 2025-11-21 | 1.0001          |
|  |  |
| 2025-11-24 | 1.0002          |
|  |  |
| 2025-11-25 | 1.0002          |
|  |  |
| 2025-11-26 | 1.0001          |
|  |  |
| 2025-11-28 | 1.0001          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $254964512.48             | $105157931.06           |
| 2025-11-04 | $193857407.59             | $155606980.88           |
| 2025-11-05 | $179381457.49             | $135437064.69           |
| 2025-11-06 | $300392673.42             | $101033350.50           |
| 2025-11-07 | $467032439.34             | $99412785.41            |
| 2025-11-10 | $41623089.35              | $95412029.19            |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $301918592.91             | $427413695.21           |
| 2025-11-13 | $77423739.35              | $179759790.64           |
| 2025-11-14 | $425203673.02             | $183589679.84           |
| 2025-11-17 | $255589685.75             | $244310506.99           |
| 2025-11-18 | $151702124.55             | $233959851.76           |
| 2025-11-19 | $98509231.35              | $267334322.71           |
| 2025-11-20 | $188122485.23             | $298091121.50           |
| 2025-11-21 | $372494332.38             | $267186714.18           |
| 2025-11-24 | $408260380.60             | $226252091.17           |
| 2025-11-25 | $80582799.97              | $231461857.31           |
| 2025-11-26 | $115751563.79             | $208667806.49           |
| 2025-11-28 | $77453538.73              | $92373954.99            |

**Total Gross Subscriptions (Month):** $3990263727.30

**Total Gross Redemptions (Month):** $3552461534.52

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 4.0000%           |
| 2025-11-04 | 3.9800%           |
| 2025-11-05 | 3.9600%           |
| 2025-11-06 | 3.9500%           |
| 2025-11-07 | 3.9000%           |
| 2025-11-10 | 3.8900%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.8900%           |
| 2025-11-13 | 3.8900%           |
| 2025-11-14 | 3.8900%           |
| 2025-11-17 | 3.8900%           |
| 2025-11-18 | 3.8900%           |
| 2025-11-19 | 3.8900%           |
| 2025-11-20 | 3.8800%           |
| 2025-11-21 | 3.8700%           |
| 2025-11-24 | 3.8700%           |
| 2025-11-25 | 3.8700%           |
| 2025-11-26 | 3.8800%           |
| 2025-11-28 | 3.9100%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Retail investor           |  | 6.1500%          | 0.0000%              |
| Non-financial corporation |  | 5.4200%          | 0.0000%              |
| Other                     | IND FID AS EXEC  | 10.1000%         | 0.0000%              |

## Part C: Schedule of Portfolio Securities

### Security 1: Government Master Fund

- **C.1 - Title:** Government Master Fund
- **C.6 - Investment Category:** Investment Company
- **Identifiers:** C.3 - CUSIP: 976WHL907, C.3 - LEI: 54930015XY4J2ENG8G36, C.5 - Other ID: 976WHL907
- **C.18 - Value (incl. sponsor support):** $14803043935.40
- **C.18.a - Value (excl. sponsor support):** $14803043935.40
- **C.19 - Percentage of Net Assets:** 100.0000%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2025-12-01
- **C.12 - Maturity Date (WAL):** 2025-12-01
- **C.13 - Final Legal Maturity Date:** 2025-12-01
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

## N-MFP: Signatures

**Registrant:** UBS Series Funds

**Date:** 2025-12-05

**By:** /s/Rose Ann Bubloski

**Name of Signing Officer:** Rose Ann Bubloski

**Title of Signing Officer:** Vice President