# EDGAR Filing Document

**Accession Number:** 0001403166
**File Stem:** 0001145549-23-015412
**Filing Date:** 2023-3
**Character Count:** 16592
**Document Hash:** 1c135cfa917c748a6bd6cdf0422b7609
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001145549-23-015412.hdr.sgml**: 20230307

**ACCESSION NUMBER**: 0001145549-23-015412

**CONFORMED SUBMISSION TYPE**: N-MFP2

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230228

**FILED AS OF DATE**: 20230307

**DATE AS OF CHANGE**: 20230307

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Master Trust
- **CENTRAL INDEX KEY:** 0001403166
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** N-MFP2
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-22078
- **FILM NUMBER:** 23712963

**BUSINESS ADDRESS:**
- **STREET 1:** C/O UBS ASSET MANAGEMENT (AMERICAS) INC.
- **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) INC.
- **STREET 2:** 787 SEVENTH AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10019

## Series and Classes Contracts Data

### Treasury Master Fund (Series ID: S000019503)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000054152 | Treasury Master Fund |  |

# Form N-MFP: Monthly Schedule of Portfolio Holdings

## N-MFP: Filer Information

**Submission Type:** N-MFP2

**Live/Test Flag:** —

**Is Electronic Copy of Paper Format:** —

**CIK:** —

### General Information

**Report for (YYYY-MM-DD):** 2023-02-28

**EDGAR Series Identifier:** S000019503

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

**Is this the fund's final filing on Form N-MFP?:** —

**Is Fund Liquidating?:** —

**Is Fund Merging/Being Acquired?:** —

**Has the fund acquired or merged with another fund during the reporting period?:** —

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

### Service Providers
| Item   | Role                          | Details                                           | File/CIK Number   |
|:---|:---|:---|:---|
| A.5    | Administrator                 | UBS ASSET MANAGEMENT (AMERICAS) INC.              |  |
| A.4    | Independent Public Accountant | Ernst & Young  LLP<br>City: New York<br>State: NY |  |
| A.6    | Transfer Agent                | None<br>CIK: —                                    |  |

### Fund Characteristics & Assets

- **A.7 - Is this a Feeder Fund?:** No

- **A.8 - Is this a Master Fund?:** Yes

- **A.9 - Is this series primarily used to fund insurance company separate accounts?:** No

- **A.10 - Money Market Fund Category:** Exempt Government

- **A.11 - WAM:** 2 days

- **A.12 - WAL:** 45 days

- **Total Value of Portfolio Securities:** $31170210438.45

- **Amortized Cost of Portfolio Securities:** $31169346235.73

- **Cash:** $10682278.56

- **Total Other Assets:** $13971177.82

- **Total Liabilities:** $2327093.00

- **Net Assets of Series:** $31191672599.11

- **Number of Shares Outstanding (Series):** 0.00

- **Stable Price Per Share:** $0.00

- **7-Day Gross Yield:** 0.0000%

### Weekly Liquid Assets
| Period         | Daily Liquid Assets ($)   | Weekly Liquid Assets ($)   | Daily Liquid Assets (%)   | Weekly Liquid Assets (%)   |
|:---|:---|:---|:---|:---|
| Friday, Week 1 |  | $31431346859.76            |  | 99.9600%                   |
| Friday, Week 2 |  | $32297727552.90            |  | 99.9500%                   |
| Friday, Week 3 |  | $30081696416.27            |  | 99.9300%                   |
| Friday, Week 4 |  | $30924396167.91            |  | 99.9400%                   |
| Friday, Week 5 |  | $0.00                      |  | 0.0000%                    |

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

### Class: Unknown Class (—)

- **B.2 - Minimum Initial Investment:** $1.00

- **B.3 - Net Assets of Class:** $31191672599.11

- **B.4 - Shares Outstanding:** 0.00

- **B.7.7 - 7-Day Net Yield:** 0.0000%

- **Person Paying for Fund Expenses?:** No

**Monthly Shareholder Flow Activity:**

- **Gross Subscriptions for month:** $0.00

- **Gross Redemptions for month:** $0.00

## Part C: Schedule of Portfolio Securities

### Security 1: Goldman Sachs & Co. Tri Party Repo

- **C.1 - Title:** Goldman Sachs & Co. Tri Party Repo 3.000000%
- **C.6 - Investment Category:** U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash
- **Identifiers:** C.3 - LEI: 254900HROIFWPRGM1V77, CIK: 0000769993, C.5 - Other ID: 384999009_3.00_0301
- **C.18 - Value (incl. sponsor support):** $600000000.00
- **C.18.a - Value (excl. sponsor support):** $600000000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.9200%
- **C.17 - Yield as of Reporting Date:** 3.0000%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **Characteristics:** 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

### Security 2: J.P. Morgan Securities Tri Party Repo

- **C.1 - Title:** J.P. Morgan Securities Tri Party Repo 4.520000%
- **C.6 - Investment Category:** U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash
- **Identifiers:** C.3 - LEI: 254900HROIFWPRGM1V77, CIK: 0001325347, C.5 - Other ID: 45599P007_4.52_0301
- **C.18 - Value (incl. sponsor support):** $150000000.00
- **C.18.a - Value (excl. sponsor support):** $150000000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.4800%
- **C.17 - Yield as of Reporting Date:** 4.5200%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **Characteristics:** 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

### Security 3: Fixed Income Clearing Corp.

- **C.1 - Title:** Fixed Income Clearing Corp. 4.540000%
- **C.6 - Investment Category:** U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash
- **Identifiers:** C.3 - LEI: 254900HROIFWPRGM1V77, CIK: 0000093748, C.5 - Other ID: 85748R009_4.54_0301
- **C.18 - Value (incl. sponsor support):** $3425000000.00
- **C.18.a - Value (excl. sponsor support):** $3425000000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 10.9800%
- **C.17 - Yield as of Reporting Date:** 4.5400%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **Characteristics:** 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

### Security 4: U.S. Treasury Bill

- **C.1 - Title:** U.S. Treasury Bill
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796CU1, C.4 - ISIN: US912796CU14, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $323005042.75
- **C.18.a - Value (excl. sponsor support):** $323005042.75
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.0400%
- **C.17 - Yield as of Reporting Date:** 4.7000%
- **C.11 - Maturity Date (WAM):** 2023-04-18
- **C.12 - Maturity Date (WAL):** 2023-04-18
- **C.13 - Final Legal Maturity Date:** 2023-04-18
- **Characteristics:** C.14 Has Demand Feature? No, C.15 Has Guarantee? Yes, 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

**C.15.a - Guarantor Details:**

- **Identity of Guarantor:** US TREASURY

- **Amount Provided:** 1.0000

### Security 5: U.S. Treasury Bill

- **C.1 - Title:** U.S. Treasury Bill
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797FG7, C.4 - ISIN: US912797FG75, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $327134747.50
- **C.18.a - Value (excl. sponsor support):** $327134747.50
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.0500%
- **C.17 - Yield as of Reporting Date:** 4.7900%
- **C.11 - Maturity Date (WAM):** 2023-05-30
- **C.12 - Maturity Date (WAL):** 2023-05-30
- **C.13 - Final Legal Maturity Date:** 2023-05-30
- **Characteristics:** C.14 Has Demand Feature? No, C.15 Has Guarantee? Yes, 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

**C.15.a - Guarantor Details:**

- **Identity of Guarantor:** US TREASURY

- **Amount Provided:** 1.0000

### Security 6: U.S. Treasury Note

- **C.1 - Title:** U.S. Treasury Note 4.841700%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CBY6, C.4 - ISIN: US91282CBY66, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $468679337.60
- **C.18.a - Value (excl. sponsor support):** $468679337.60
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.5000%
- **C.17 - Yield as of Reporting Date:** 4.6900%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-04-30
- **C.13 - Final Legal Maturity Date:** 2023-04-30
- **Characteristics:** C.14 Has Demand Feature? No, C.15 Has Guarantee? Yes, 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

**C.15.a - Guarantor Details:**

- **Identity of Guarantor:** US TREASURY

- **Amount Provided:** 1.0000

### Security 7: U.S. Treasury Note

- **C.1 - Title:** U.S. Treasury Note 4.732700%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CEL1, C.4 - ISIN: US91282CEL19, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $199697060.00
- **C.18.a - Value (excl. sponsor support):** $199697060.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.6400%
- **C.17 - Yield as of Reporting Date:** 4.8600%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2024-04-30
- **C.13 - Final Legal Maturity Date:** 2024-04-30
- **Characteristics:** C.14 Has Demand Feature? No, C.15 Has Guarantee? Yes, 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

**C.15.a - Guarantor Details:**

- **Identity of Guarantor:** US TREASURY

- **Amount Provided:** 1.0000

### Security 8: U.S. Treasury Floating Rate Note

- **C.1 - Title:** U.S. Treasury Floating Rate Note 4.844700%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CFD8, C.4 - ISIN: US91282CFD83, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $934679818.60
- **C.18.a - Value (excl. sponsor support):** $934679818.60
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.0000%
- **C.17 - Yield as of Reporting Date:** 4.8700%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2024-07-31
- **C.13 - Final Legal Maturity Date:** 2024-07-31
- **Characteristics:** C.14 Has Demand Feature? No, C.15 Has Guarantee? Yes, 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

**C.15.a - Guarantor Details:**

- **Identity of Guarantor:** US TREASURY

- **Amount Provided:** 1.0000

### Security 9: U.S. Treasury Floating Rate Note

- **C.1 - Title:** U.S. Treasury Floating Rate Note 4.947700%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CFS5, C.4 - ISIN: US91282CFS52, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $515384493.85
- **C.18.a - Value (excl. sponsor support):** $515384493.85
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.6500%
- **C.17 - Yield as of Reporting Date:** 4.9000%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2024-10-31
- **C.13 - Final Legal Maturity Date:** 2024-10-31
- **Characteristics:** C.14 Has Demand Feature? No, C.15 Has Guarantee? Yes, 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

**C.15.a - Guarantor Details:**

- **Identity of Guarantor:** US TREASURY

- **Amount Provided:** 1.0000

### Security 10: U.S. Treasury Floating Rate Note

- **C.1 - Title:** U.S. Treasury Floating Rate Note 5.007700%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CGF2, C.4 - ISIN: US91282CGF23, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $601629938.15
- **C.18.a - Value (excl. sponsor support):** $601629938.15
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.9300%
- **C.17 - Yield as of Reporting Date:** 4.9500%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2025-01-31
- **C.13 - Final Legal Maturity Date:** 2025-01-31
- **Characteristics:** C.14 Has Demand Feature? No, C.15 Has Guarantee? Yes, 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

**C.15.a - Guarantor Details:**

- **Identity of Guarantor:** US TREASURY

- **Amount Provided:** 1.0000

### Security 11: Merrill Lynch Pierce Fenner & Smith, Inc. Tri Party Repo

- **C.1 - Title:** Merrill Lynch Pierce Fenner & Smith, Inc. Tri Party Repo 4.520000%
- **C.6 - Investment Category:** U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash
- **Identifiers:** C.3 - LEI: 254900HROIFWPRGM1V77, CIK: 0001102113, C.5 - Other ID: 922URC004_4.52_0301
- **C.18 - Value (incl. sponsor support):** $275000000.00
- **C.18.a - Value (excl. sponsor support):** $275000000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.8800%
- **C.17 - Yield as of Reporting Date:** 4.5200%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **Characteristics:** 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

### Security 12: Federal Reserve Bank of New York Tri Party Repo

- **C.1 - Title:** Federal Reserve Bank of New York Tri Party Repo 4.550000%
- **C.6 - Investment Category:** U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash
- **Identifiers:** C.3 - LEI: 254900HROIFWPRGM1V77, CIK: 0001457970, C.5 - Other ID: 98599G006_4.55_0301
- **C.18 - Value (incl. sponsor support):** $23350000000.00
- **C.18.a - Value (excl. sponsor support):** $23350000000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 74.8600%
- **C.17 - Yield as of Reporting Date:** 4.5500%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **Characteristics:** 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 Master Trust

**Date:** 2023-03-07

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

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

**Title of Signing Officer:** Vice President