# EDGAR Filing Document

**Accession Number:** 0001060517
**File Stem:** 0001145549-25-050837
**Filing Date:** 2025-8
**Character Count:** 13890
**Document Hash:** 95642dc50fb402d0684de5aede505996
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001145549-25-050837.hdr.sgml**: 20250807

**ACCESSION NUMBER**: 0001145549-25-050837

**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:** 251193139

**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 RMA Government Money Market Fund (Series ID: S000053134)

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

# 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 RMA Government Money Market Fund

**LEI of Series:** 549300WUNTYEEH9XHV55

**EDGAR Series Identifier:** S000053134

**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:** $897879596.86

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

- **Cash:** $0.00

- **Total Other Assets:** $137018.17

- **Total Liabilities:** $3806090.55

- **Net Assets of Series:** $894210524.48

- **Number of Shares Outstanding (Series):** 894209374.6500

- **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 | 4.4000%             |
| 2025-07-02 | 4.4000%             |
| 2025-07-03 | 4.3800%             |
| 2025-07-07 | 4.3800%             |
| 2025-07-08 | 4.3700%             |
| 2025-07-09 | 4.3700%             |
| 2025-07-10 | 4.3700%             |
| 2025-07-11 | 4.3600%             |
| 2025-07-14 | 4.3600%             |
| 2025-07-15 | 4.3700%             |
| 2025-07-16 | 4.3700%             |
| 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 | 4.3900%             |

### 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 | 1.0000                      |
|  |  |
| 2025-07-08 | 1.0000                      |
|  |  |
| 2025-07-09 | 1.0001                      |
|  |  |
| 2025-07-10 | 1.0001                      |
|  |  |
| 2025-07-11 | 1.0000                      |
|  |  |
| 2025-07-14 | 1.0000                      |
|  |  |
| 2025-07-15 | 1.0000                      |
|  |  |
| 2025-07-16 | 1.0000                      |
|  |  |
| 2025-07-17 | 1.0000                      |
|  |  |
| 2025-07-18 | 1.0000                      |
|  |  |
| 2025-07-21 | 1.0000                      |
|  |  |
| 2025-07-22 | 1.0001                      |
|  |  |
| 2025-07-23 | 1.0000                      |
|  |  |
| 2025-07-24 | 1.0000                      |
|  |  |
| 2025-07-25 | 1.0000                      |
|  |  |
| 2025-07-28 | 1.0000                      |
|  |  |
| 2025-07-29 | 1.0001                      |
|  |  |
| 2025-07-30 | 1.0000                      |
|  |  |
| 2025-07-31 | 1.0000                      |
|  |  |

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

### Class: Class A

- **Minimum Initial Investment:** $5000.00

- **Net Assets of Class:** $894210524.48

- **Number of Shares Outstanding:** 894209374.6500

**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 | 1.0000          |
|  |  |
| 2025-07-08 | 1.0000          |
|  |  |
| 2025-07-09 | 1.0001          |
|  |  |
| 2025-07-10 | 1.0001          |
|  |  |
| 2025-07-11 | 1.0000          |
|  |  |
| 2025-07-14 | 1.0000          |
|  |  |
| 2025-07-15 | 1.0000          |
|  |  |
| 2025-07-16 | 1.0000          |
|  |  |
| 2025-07-17 | 1.0000          |
|  |  |
| 2025-07-18 | 1.0000          |
|  |  |
| 2025-07-21 | 1.0000          |
|  |  |
| 2025-07-22 | 1.0001          |
|  |  |
| 2025-07-23 | 1.0000          |
|  |  |
| 2025-07-24 | 1.0000          |
|  |  |
| 2025-07-25 | 1.0000          |
|  |  |
| 2025-07-28 | 1.0000          |
|  |  |
| 2025-07-29 | 1.0001          |
|  |  |
| 2025-07-30 | 1.0000          |
|  |  |
| 2025-07-31 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-07-01 | $489024291.31             | $56632517.63            |
| 2025-07-02 | $56285966.97              | $516388626.53           |
| 2025-07-03 | $493917573.96             | $506923802.49           |
| 2025-07-07 | $47797995.76              | $44924946.39            |
| 2025-07-08 | $40313817.01              | $56849209.44            |
| 2025-07-09 | $41789655.80              | $46658402.34            |
| 2025-07-10 | $54155893.14              | $35661380.19            |
| 2025-07-11 | $38749739.37              | $46926497.68            |
| 2025-07-14 | $51067080.63              | $56400407.41            |
| 2025-07-15 | $93293334.25              | $44214737.44            |
| 2025-07-16 | $65321532.08              | $99502182.28            |
| 2025-07-17 | $92796766.60              | $97468068.26            |
| 2025-07-18 | $50465640.65              | $59378686.28            |
| 2025-07-21 | $32465065.63              | $29185452.63            |
| 2025-07-22 | $191474242.13             | $181331430.36           |
| 2025-07-23 | $191781183.73             | $185823744.78           |
| 2025-07-24 | $101611870.28             | $36698185.20            |
| 2025-07-25 | $34812800.65              | $241588080.76           |
| 2025-07-28 | $254438012.55             | $255955935.03           |
| 2025-07-29 | $54801423.17              | $50751175.65            |
| 2025-07-30 | $75639254.96              | $62922736.35            |
| 2025-07-31 | $61683139.33              | $88784581.13            |

**Total Gross Subscriptions (Month):** $2613686279.96

**Total Gross Redemptions (Month):** $2800970786.25

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-07-01 | 3.7500%           |
| 2025-07-02 | 3.7600%           |
| 2025-07-03 | 3.7300%           |
| 2025-07-07 | 3.7300%           |
| 2025-07-08 | 3.7100%           |
| 2025-07-09 | 3.7000%           |
| 2025-07-10 | 3.7000%           |
| 2025-07-11 | 3.6900%           |
| 2025-07-14 | 3.6900%           |
| 2025-07-15 | 3.6900%           |
| 2025-07-16 | 3.6900%           |
| 2025-07-17 | 3.6900%           |
| 2025-07-18 | 3.6900%           |
| 2025-07-21 | 3.6800%           |
| 2025-07-22 | 3.6700%           |
| 2025-07-23 | 3.6700%           |
| 2025-07-24 | 3.6700%           |
| 2025-07-25 | 3.6700%           |
| 2025-07-28 | 3.6700%           |
| 2025-07-29 | 3.6700%           |
| 2025-07-30 | 3.6700%           |
| 2025-07-31 | 3.6700%           |

## 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):** $897879596.86
- **C.18.a - Value (excl. sponsor support):** $897879596.86
- **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