# EDGAR Filing Document

**Accession Number:** 0001060517
**File Stem:** 0001145549-25-050838
**Filing Date:** 2025-8
**Character Count:** 13912
**Document Hash:** e03f687eafec0c02112593a2181c830d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001145549-25-050838.hdr.sgml**: 20250807

**ACCESSION NUMBER**: 0001145549-25-050838

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250731

**FILED AS OF DATE**: 20250807

**DATE AS OF CHANGE**: 20250807

**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:** 251193140

**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):** 2025-07-31

**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:** $9553511210.91

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

- **Cash:** $0.00

- **Total Other Assets:** $0.00

- **Total Liabilities:** $34426679.21

- **Net Assets of Series:** $9519084531.70

- **Number of Shares Outstanding (Series):** 9518680895.3000

- **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 (%)   |
|:---|:---|:---|:---|:---|
| 2025-07-01 | $20447997141.27           | $21440802799.09            | 78.4800%                  | 82.2900%                   |
| 2025-07-02 | $20212928142.51           | $21117823951.28            | 78.5500%                  | 82.0700%                   |
| 2025-07-03 | $20233283152.14           | $21050248471.45            | 78.8200%                  | 82.0000%                   |
| 2025-07-07 | $20623952845.73           | $21441186300.82            | 79.1400%                  | 82.2800%                   |
| 2025-07-08 | $20627796599.68           | $21445100765.91            | 79.1400%                  | 82.2800%                   |
| 2025-07-09 | $21125130913.93           | $21690537886.97            | 80.2900%                  | 82.4400%                   |
| 2025-07-10 | $20456600683.64           | $21022050560.19            | 79.7800%                  | 81.9900%                   |
| 2025-07-11 | $20480078960.42           | $21045571739.49            | 79.7800%                  | 81.9800%                   |
| 2025-07-14 | $21342069712.77           | $21907692995.33            | 80.4400%                  | 82.5700%                   |
| 2025-07-15 | $21214044675.95           | $21779708670.61            | 79.8500%                  | 81.9700%                   |
| 2025-07-16 | $21063701197.74           | $21629407800.24            | 79.7300%                  | 81.8700%                   |
| 2025-07-17 | $20395733812.85           | $20961484603.72            | 79.2100%                  | 81.4000%                   |
| 2025-07-18 | $20459098593.61           | $20925926919.02            | 79.5400%                  | 81.3600%                   |
| 2025-07-21 | $20935779822.17           | $21402701635.10            | 79.9300%                  | 81.7100%                   |
| 2025-07-22 | $20619689703.22           | $20952658522.70            | 79.7000%                  | 80.9900%                   |
| 2025-07-23 | $21021478654.68           | $21221478654.68            | 80.4300%                  | 81.1900%                   |
| 2025-07-24 | $20678904852.16           | $20878904852.16            | 80.1600%                  | 80.9400%                   |
| 2025-07-25 | $20702966984.40           | $20902966984.40            | 80.1700%                  | 80.9400%                   |
| 2025-07-28 | $21200839868.83           | $21430840482.33            | 80.5600%                  | 81.4400%                   |
| 2025-07-29 | $20588268007.04           | $20933269660.14            | 80.1000%                  | 81.4400%                   |
| 2025-07-30 | $20583187360.02           | $21058189907.22            | 80.0900%                  | 81.9400%                   |
| 2025-07-31 | $19870208719.69           | $20345211153.24            | 79.6500%                  | 81.5600%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2025-07-01 | 4.3900%             |
| 2025-07-02 | 4.4000%             |
| 2025-07-03 | 4.3800%             |
| 2025-07-07 | 4.3700%             |
| 2025-07-08 | 4.3700%             |
| 2025-07-09 | 4.3600%             |
| 2025-07-10 | 4.3600%             |
| 2025-07-11 | 4.3600%             |
| 2025-07-14 | 4.3600%             |
| 2025-07-15 | 4.3600%             |
| 2025-07-16 | 4.3600%             |
| 2025-07-17 | 4.3700%             |
| 2025-07-18 | 4.3600%             |
| 2025-07-21 | 4.3600%             |
| 2025-07-22 | 4.3500%             |
| 2025-07-23 | 4.3500%             |
| 2025-07-24 | 4.3500%             |
| 2025-07-25 | 4.3600%             |
| 2025-07-28 | 4.3700%             |
| 2025-07-29 | 4.3700%             |
| 2025-07-30 | 4.3800%             |
| 2025-07-31 | 4.3800%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2025-07-01 | 1.0001                      |
|  |  |
| 2025-07-02 | 1.0001                      |
|  |  |
| 2025-07-03 | 1.0000                      |
|  |  |
| 2025-07-07 | 1.0001                      |
|  |  |
| 2025-07-08 | 1.0001                      |
|  |  |
| 2025-07-09 | 1.0001                      |
|  |  |
| 2025-07-10 | 1.0001                      |
|  |  |
| 2025-07-11 | 1.0001                      |
|  |  |
| 2025-07-14 | 1.0001                      |
|  |  |
| 2025-07-15 | 1.0000                      |
|  |  |
| 2025-07-16 | 1.0001                      |
|  |  |
| 2025-07-17 | 1.0001                      |
|  |  |
| 2025-07-18 | 1.0001                      |
|  |  |
| 2025-07-21 | 1.0001                      |
|  |  |
| 2025-07-22 | 1.0001                      |
|  |  |
| 2025-07-23 | 1.0001                      |
|  |  |
| 2025-07-24 | 1.0001                      |
|  |  |
| 2025-07-25 | 1.0001                      |
|  |  |
| 2025-07-28 | 1.0001                      |
|  |  |
| 2025-07-29 | 1.0001                      |
|  |  |
| 2025-07-30 | 1.0001                      |
|  |  |
| 2025-07-31 | 1.0001                      |
|  |  |

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

### Class: Basis A

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $9519084531.70

- **Number of Shares Outstanding:** 9518680895.3000

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-07-01 | 1.0001          |
|  |  |
| 2025-07-02 | 1.0001          |
|  |  |
| 2025-07-03 | 1.0000          |
|  |  |
| 2025-07-07 | 1.0001          |
|  |  |
| 2025-07-08 | 1.0001          |
|  |  |
| 2025-07-09 | 1.0001          |
|  |  |
| 2025-07-10 | 1.0001          |
|  |  |
| 2025-07-11 | 1.0001          |
|  |  |
| 2025-07-14 | 1.0001          |
|  |  |
| 2025-07-15 | 1.0000          |
|  |  |
| 2025-07-16 | 1.0001          |
|  |  |
| 2025-07-17 | 1.0001          |
|  |  |
| 2025-07-18 | 1.0001          |
|  |  |
| 2025-07-21 | 1.0001          |
|  |  |
| 2025-07-22 | 1.0001          |
|  |  |
| 2025-07-23 | 1.0001          |
|  |  |
| 2025-07-24 | 1.0001          |
|  |  |
| 2025-07-25 | 1.0001          |
|  |  |
| 2025-07-28 | 1.0001          |
|  |  |
| 2025-07-29 | 1.0001          |
|  |  |
| 2025-07-30 | 1.0001          |
|  |  |
| 2025-07-31 | 1.0001          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-07-01 | $431542704.26             | $93459241.61            |
| 2025-07-02 | $224444305.65             | $43669365.85            |
| 2025-07-03 | $292676400.74             | $23846858.66            |
| 2025-07-07 | $55502011.71              | $439031195.08           |
| 2025-07-08 | $47315436.66              | $177585304.69           |
| 2025-07-09 | $39614261.45              | $180275554.42           |
| 2025-07-10 | $56296890.63              | $90636686.68            |
| 2025-07-11 | $123987172.20             | $74286119.87            |
| 2025-07-14 | $54170849.00              | $55983540.06            |
| 2025-07-15 | $49561381.06              | $61635747.86            |
| 2025-07-16 | $81665444.77              | $88489579.39            |
| 2025-07-17 | $114238788.51             | $66414110.93            |
| 2025-07-18 | $36161764.83              | $77890554.31            |
| 2025-07-21 | $39085414.18              | $46267062.89            |
| 2025-07-22 | $61126119.97              | $47242928.67            |
| 2025-07-23 | $88745298.08              | $59933943.52            |
| 2025-07-24 | $175395885.48             | $68374157.02            |
| 2025-07-25 | $72670121.70              | $130567628.87           |
| 2025-07-28 | $122601304.96             | $68206287.53            |
| 2025-07-29 | $112243793.73             | $56966030.96            |
| 2025-07-30 | $31333380.83              | $226109213.34           |
| 2025-07-31 | $178321873.17             | $128748258.67           |

**Total Gross Subscriptions (Month):** $2488700603.57

**Total Gross Redemptions (Month):** $2305619370.88

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-07-01 | 4.2100%           |
| 2025-07-02 | 4.2200%           |
| 2025-07-03 | 4.2000%           |
| 2025-07-07 | 4.1900%           |
| 2025-07-08 | 4.1900%           |
| 2025-07-09 | 4.1800%           |
| 2025-07-10 | 4.1800%           |
| 2025-07-11 | 4.1800%           |
| 2025-07-14 | 4.1800%           |
| 2025-07-15 | 4.1800%           |
| 2025-07-16 | 4.1800%           |
| 2025-07-17 | 4.1900%           |
| 2025-07-18 | 4.1800%           |
| 2025-07-21 | 4.1800%           |
| 2025-07-22 | 4.1700%           |
| 2025-07-23 | 4.1700%           |
| 2025-07-24 | 4.1700%           |
| 2025-07-25 | 4.1800%           |
| 2025-07-28 | 4.1800%           |
| 2025-07-29 | 4.1900%           |
| 2025-07-30 | 4.2000%           |
| 2025-07-31 | 4.2000%           |

## 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):** $9553511210.91
- **C.18.a - Value (excl. sponsor support):** $9553511210.91
- **C.19 - Percentage of Net Assets:** 100.0000%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2025-08-01
- **C.12 - Maturity Date (WAL):** 2025-08-01
- **C.13 - Final Legal Maturity Date:** 2025-08-01
- **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:** 2025-08-07

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

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

**Title of Signing Officer:** Vice President