# EDGAR Filing Document

**Accession Number:** 0001060517
**File Stem:** 0001410368-25-033526
**Filing Date:** 2025-12
**Character Count:** 12820
**Document Hash:** 6b2ffbd5d7df46f4e79f0d9422e3b008
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-033526.hdr.sgml**: 20251205

**ACCESSION NUMBER**: 0001410368-25-033526

**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:** 251552591

**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 Institutional Fund (Series ID: S000053131)

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

# 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 Institutional Fund

**LEI of Series:** 549300TZ2QEM4T3XX713

**EDGAR Series Identifier:** S000053131

**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:** $9712689713.68

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

- **Cash:** $0.00

- **Total Other Assets:** $0.00

- **Total Liabilities:** $31476566.89

- **Net Assets of Series:** $9681213146.79

- **Number of Shares Outstanding (Series):** 9680809510.3900

- **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 | 1.0001                      |
|  |  |
| 2025-11-04 | 1.0002                      |
|  |  |
| 2025-11-05 | 1.0001                      |
|  |  |
| 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:** $1000000.00

- **Net Assets of Class:** $9681213146.79

- **Number of Shares Outstanding:** 9680809510.3900

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0001          |
|  |  |
| 2025-11-04 | 1.0002          |
|  |  |
| 2025-11-05 | 1.0001          |
|  |  |
| 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 | $295595612.26             | $73574701.87            |
| 2025-11-04 | $61810559.78              | $172334041.33           |
| 2025-11-05 | $137528929.19             | $55339872.19            |
| 2025-11-06 | $31184048.93              | $34566625.59            |
| 2025-11-07 | $65109505.10              | $172431402.73           |
| 2025-11-10 | $88659586.49              | $97481677.94            |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $178770582.94             | $94384152.32            |
| 2025-11-13 | $39503726.70              | $54889930.03            |
| 2025-11-14 | $62729258.66              | $97889976.53            |
| 2025-11-17 | $52712057.61              | $85132941.10            |
| 2025-11-18 | $61075205.38              | $82254274.46            |
| 2025-11-19 | $53720754.76              | $46420747.41            |
| 2025-11-20 | $66932286.79              | $67465216.69            |
| 2025-11-21 | $84628807.68              | $147258583.54           |
| 2025-11-24 | $83919313.40              | $106059742.28           |
| 2025-11-25 | $94172934.13              | $62795426.44            |
| 2025-11-26 | $65902961.50              | $79625030.80            |
| 2025-11-28 | $124626227.64             | $25320867.31            |

**Total Gross Subscriptions (Month):** $1648582358.94

**Total Gross Redemptions (Month):** $1555225210.56

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.9600%           |
| 2025-11-04 | 3.9400%           |
| 2025-11-05 | 3.9200%           |
| 2025-11-06 | 3.9100%           |
| 2025-11-07 | 3.8600%           |
| 2025-11-10 | 3.8500%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.8500%           |
| 2025-11-13 | 3.8500%           |
| 2025-11-14 | 3.8500%           |
| 2025-11-17 | 3.8500%           |
| 2025-11-18 | 3.8500%           |
| 2025-11-19 | 3.8500%           |
| 2025-11-20 | 3.8400%           |
| 2025-11-21 | 3.8300%           |
| 2025-11-24 | 3.8300%           |
| 2025-11-25 | 3.8300%           |
| 2025-11-26 | 3.8400%           |
| 2025-11-28 | 3.8700%           |

## 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):** $9712689713.68
- **C.18.a - Value (excl. sponsor support):** $9712689713.68
- **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