# EDGAR Filing Document

**Accession Number:** 0000889512
**File Stem:** 0001193125-25-233293
**Filing Date:** 2025-10
**Character Count:** 18112
**Document Hash:** 972c6a714d0c9ea330da2d42f816c4c4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-233293.hdr.sgml**: 20251007

**ACCESSION NUMBER**: 0001193125-25-233293

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250930

**FILED AS OF DATE**: 20251007

**DATE AS OF CHANGE**: 20251007

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LEGG MASON PARTNERS INSTITUTIONAL TRUST
- **CENTRAL INDEX KEY:** 0000889512

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 0831

**FILING VALUES:**
- **FORM TYPE:** N-MFP3
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-06740
- **FILM NUMBER:** 251379498

**BUSINESS ADDRESS:**
- **STREET 1:** LEGG MASON & CO., LLC
- **STREET 2:** 620 EIGHTH AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10018
- **BUSINESS PHONE:** 1-877-721-1926

**MAIL ADDRESS:**
- **STREET 1:** LEGG MASON & CO., LLC
- **STREET 2:** 620 EIGHTH AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10018

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CITIFUNDS INSTITUTIONAL TRUST
- **DATE OF NAME CHANGE:** 19981030

## Series and Classes Contracts Data

### Western Asset Premier Institutional U.S. Treasury Reserves (Series ID: S000066841)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000215196 | Premium Shares | WAEXX           |
| C000215197 | Capital Shares | WADXX           |

# Form N-MFP3: Monthly Schedule of Portfolio Holdings

## N-MFP: Filer Information
**Submission Type:** N-MFP3
**CIK:** 0000889512

### General Information

**Report for (YYYY-MM-DD):** 2025-09-30

**Registrant Full Name:** Legg Mason Partners Institutional Trust

**CIK Number of Registrant:** 0000889512

**LEI of Registrant:** 54930003LJE4ZPPMRV82

**Name of Series:** Western Asset Premier Institutional U.S. Treasury Reserves

**LEI of Series:** 549300FS1J68EF5THY28

**EDGAR Series Identifier:** S000066841

**Total number of share classes in the series:** 2

**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            | Franklin Templeton Fund Adviser LLC                          | 801-66785         |
| Independent Public Accountant | PricewaterhouseCoopers LLP<br>City: Baltimore<br>State: MD   |  |
| Transfer Agent                | BNY Mellon Investment Servicing (US) Inc.<br>CIK: 0000849542 | 084-01761         |

### Fund Characteristics & Assets

- **Securities Act File Number:** 033-49552

- **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:** 6 days

- **WAL:** 6 days

- **Total Value of Portfolio Securities:** $1398817442.32

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

- **Cash:** $0.00

- **Total Other Assets:** $35865.58

- **Total Liabilities:** $5796652.96

- **Net Assets of Series:** $1393056654.94

- **Number of Shares Outstanding (Series):** 1393069788.6700

- **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 (%)   |
|:---|:---|:---|:---|:---|
| 2025-09-02 | $17369451528.38           | $17369451528.38            | 99.8500%                  | 99.8500%                   |
| 2025-09-03 | $17316490869.87           | $17316490869.87            | 99.8400%                  | 99.8400%                   |
| 2025-09-04 | $17534674688.21           | $17534674688.21            | 99.8400%                  | 99.8400%                   |
| 2025-09-05 | $18126004420.27           | $18126004420.27            | 99.8300%                  | 99.8300%                   |
| 2025-09-08 | $18927323353.20           | $18927323353.20            | 99.8300%                  | 99.8300%                   |
| 2025-09-09 | $18000260923.76           | $18000260923.76            | 99.8200%                  | 99.8200%                   |
| 2025-09-10 | $17828037126.01           | $17828037126.01            | 99.8200%                  | 99.8200%                   |
| 2025-09-11 | $17792683944.13           | $17792683944.13            | 99.8200%                  | 99.8200%                   |
| 2025-09-12 | $17780510503.90           | $17780510503.90            | 99.8100%                  | 99.8100%                   |
| 2025-09-15 | $18144033806.95           | $18144033806.95            | 99.8000%                  | 99.8000%                   |
| 2025-09-16 | $17860038265.04           | $17860038265.04            | 99.8000%                  | 99.8000%                   |
| 2025-09-17 | $18183771228.56           | $18183771228.56            | 99.7900%                  | 99.7900%                   |
| 2025-09-18 | $19198428476.88           | $19198428476.88            | 99.8000%                  | 99.8000%                   |
| 2025-09-19 | $19597364515.87           | $19597364515.87            | 99.7900%                  | 99.7900%                   |
| 2025-09-22 | $19483308022.33           | $19483308022.33            | 99.7900%                  | 99.7900%                   |
| 2025-09-23 | $18454665559.26           | $18454665559.26            | 99.7700%                  | 99.7700%                   |
| 2025-09-24 | $18744118158.23           | $18744118158.23            | 99.7700%                  | 99.7700%                   |
| 2025-09-25 | $19047249851.74           | $19047249851.74            | 99.7700%                  | 99.7700%                   |
| 2025-09-26 | $18807420431.36           | $18807420431.36            | 99.7600%                  | 99.7600%                   |
| 2025-09-29 | $19076736904.62           | $19076736904.62            | 99.7600%                  | 99.7600%                   |
| 2025-09-30 | $18250101841.85           | $18250101841.85            | 99.8100%                  | 99.8100%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2025-09-02 | 4.3200%             |
| 2025-09-03 | 4.3200%             |
| 2025-09-04 | 4.3100%             |
| 2025-09-05 | 4.2900%             |
| 2025-09-08 | 4.2800%             |
| 2025-09-09 | 4.2700%             |
| 2025-09-10 | 4.2600%             |
| 2025-09-11 | 4.2600%             |
| 2025-09-12 | 4.2400%             |
| 2025-09-15 | 4.2300%             |
| 2025-09-16 | 4.2300%             |
| 2025-09-17 | 4.2200%             |
| 2025-09-18 | 4.2200%             |
| 2025-09-19 | 4.2000%             |
| 2025-09-22 | 4.1900%             |
| 2025-09-23 | 4.1900%             |
| 2025-09-24 | 4.1800%             |
| 2025-09-25 | 4.1800%             |
| 2025-09-26 | 4.1700%             |
| 2025-09-29 | 4.1600%             |
| 2025-09-30 | 4.1600%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2025-09-02 | 1.0000                      |
|  |  |
| 2025-09-03 | 1.0000                      |
|  |  |
| 2025-09-04 | 1.0000                      |
|  |  |
| 2025-09-05 | 1.0000                      |
|  |  |
| 2025-09-08 | 1.0000                      |
|  |  |
| 2025-09-09 | 1.0000                      |
|  |  |
| 2025-09-10 | 1.0000                      |
|  |  |
| 2025-09-11 | 1.0000                      |
|  |  |
| 2025-09-12 | 1.0000                      |
|  |  |
| 2025-09-15 | 1.0000                      |
|  |  |
| 2025-09-16 | 1.0000                      |
|  |  |
| 2025-09-17 | 1.0000                      |
|  |  |
| 2025-09-18 | 1.0000                      |
|  |  |
| 2025-09-19 | 1.0000                      |
|  |  |
| 2025-09-22 | 1.0000                      |
|  |  |
| 2025-09-23 | 1.0000                      |
|  |  |
| 2025-09-24 | 1.0000                      |
|  |  |
| 2025-09-25 | 1.0000                      |
|  |  |
| 2025-09-26 | 1.0000                      |
|  |  |
| 2025-09-29 | 1.0000                      |
|  |  |
| 2025-09-30 | 1.0000                      |
|  |  |

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

### Class: PC

- **Minimum Initial Investment:** $1.00

- **Net Assets of Class:** $1346837886.30

- **Number of Shares Outstanding:** 1346853243.4000

- **Expense Reimbursement/Waiver:** 275949.25

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-09-02 | 1.0000          |
|  |  |
| 2025-09-03 | 1.0000          |
|  |  |
| 2025-09-04 | 1.0000          |
|  |  |
| 2025-09-05 | 1.0000          |
|  |  |
| 2025-09-08 | 1.0000          |
|  |  |
| 2025-09-09 | 1.0000          |
|  |  |
| 2025-09-10 | 1.0000          |
|  |  |
| 2025-09-11 | 1.0000          |
|  |  |
| 2025-09-12 | 1.0000          |
|  |  |
| 2025-09-15 | 1.0000          |
|  |  |
| 2025-09-16 | 1.0000          |
|  |  |
| 2025-09-17 | 1.0000          |
|  |  |
| 2025-09-18 | 1.0000          |
|  |  |
| 2025-09-19 | 1.0000          |
|  |  |
| 2025-09-22 | 1.0000          |
|  |  |
| 2025-09-23 | 1.0000          |
|  |  |
| 2025-09-24 | 1.0000          |
|  |  |
| 2025-09-25 | 1.0000          |
|  |  |
| 2025-09-26 | 1.0000          |
|  |  |
| 2025-09-29 | 1.0000          |
|  |  |
| 2025-09-30 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-09-02 | $1494788.77               | $8934312.02             |
| 2025-09-03 | $0.00                     | $288020923.85           |
| 2025-09-04 | $45479671.09              | $0.02                   |
| 2025-09-05 | $0.00                     | $45765859.76            |
| 2025-09-08 | $3652801.93               | $0.00                   |
| 2025-09-09 | $91860011.71              | $0.00                   |
| 2025-09-10 | $0.00                     | $25252542.98            |
| 2025-09-11 | $0.00                     | $98846250.72            |
| 2025-09-12 | $56348949.22              | $0.00                   |
| 2025-09-15 | $10710000.00              | $9184082.06             |
| 2025-09-16 | $80775488.28              | $0.00                   |
| 2025-09-17 | $55600028.57              | $0.00                   |
| 2025-09-18 | $162060688.75             | $0.00                   |
| 2025-09-19 | $0.00                     | $40806915.73            |
| 2025-09-22 | $44715856.17              | $0.00                   |
| 2025-09-23 | $0.00                     | $54537710.57            |
| 2025-09-24 | $0.00                     | $35489321.21            |
| 2025-09-25 | $0.00                     | $137583924.36           |
| 2025-09-26 | $0.00                     | $12675598.17            |
| 2025-09-29 | $0.00                     | $55775657.94            |
| 2025-09-30 | $0.00                     | $48104900.92            |

**Total Gross Subscriptions (Month):** $552698284.49

**Total Gross Redemptions (Month):** $860978000.31

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-09-02 | 4.1800%           |
| 2025-09-03 | 4.1800%           |
| 2025-09-04 | 4.1700%           |
| 2025-09-05 | 4.1500%           |
| 2025-09-08 | 4.1200%           |
| 2025-09-09 | 4.1300%           |
| 2025-09-10 | 4.1200%           |
| 2025-09-11 | 4.1200%           |
| 2025-09-12 | 4.1000%           |
| 2025-09-15 | 4.0900%           |
| 2025-09-16 | 4.0900%           |
| 2025-09-17 | 4.0800%           |
| 2025-09-18 | 4.0800%           |
| 2025-09-19 | 4.0600%           |
| 2025-09-22 | 4.0500%           |
| 2025-09-23 | 4.0500%           |
| 2025-09-24 | 4.0400%           |
| 2025-09-25 | 4.0400%           |
| 2025-09-26 | 4.0300%           |
| 2025-09-29 | 4.0200%           |
| 2025-09-30 | 4.0200%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 6.3700%          | 0.0000%              |
| Non-financial corporation                           |  | 7.4400%          | 0.0000%              |
| Non-financial corporation                           |  | 85.8100%         | 0.0000%              |

### Class: CC

- **Minimum Initial Investment:** $200000000.00

- **Net Assets of Class:** $46218768.64

- **Number of Shares Outstanding:** 46216545.2700

- **Expense Reimbursement/Waiver:** 40408.87

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-09-02 | 1.0000          |
|  |  |
| 2025-09-03 | 1.0000          |
|  |  |
| 2025-09-04 | 1.0000          |
|  |  |
| 2025-09-05 | 1.0000          |
|  |  |
| 2025-09-08 | 1.0000          |
|  |  |
| 2025-09-09 | 1.0000          |
|  |  |
| 2025-09-10 | 1.0000          |
|  |  |
| 2025-09-11 | 1.0000          |
|  |  |
| 2025-09-12 | 1.0000          |
|  |  |
| 2025-09-15 | 1.0000          |
|  |  |
| 2025-09-16 | 1.0000          |
|  |  |
| 2025-09-17 | 1.0000          |
|  |  |
| 2025-09-18 | 1.0000          |
|  |  |
| 2025-09-19 | 1.0000          |
|  |  |
| 2025-09-22 | 1.0000          |
|  |  |
| 2025-09-23 | 1.0000          |
|  |  |
| 2025-09-24 | 1.0000          |
|  |  |
| 2025-09-25 | 1.0000          |
|  |  |
| 2025-09-26 | 1.0000          |
|  |  |
| 2025-09-29 | 1.0000          |
|  |  |
| 2025-09-30 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-09-02 | $589818.40                | $0.00                   |
| 2025-09-03 | $0.00                     | $0.00                   |
| 2025-09-04 | $19000000.00              | $0.00                   |
| 2025-09-05 | $0.00                     | $0.00                   |
| 2025-09-08 | $0.00                     | $0.00                   |
| 2025-09-09 | $0.00                     | $0.00                   |
| 2025-09-10 | $10000000.00              | $0.00                   |
| 2025-09-11 | $0.00                     | $0.00                   |
| 2025-09-12 | $0.00                     | $10150000.00            |
| 2025-09-15 | $0.00                     | $0.00                   |
| 2025-09-16 | $0.00                     | $0.00                   |
| 2025-09-17 | $0.00                     | $0.00                   |
| 2025-09-18 | $0.00                     | $0.00                   |
| 2025-09-19 | $0.00                     | $0.00                   |
| 2025-09-22 | $0.00                     | $0.00                   |
| 2025-09-23 | $0.00                     | $4000000.00             |
| 2025-09-24 | $0.00                     | $0.00                   |
| 2025-09-25 | $0.00                     | $20000000.00            |
| 2025-09-26 | $0.00                     | $10000000.00            |
| 2025-09-29 | $0.00                     | $0.00                   |
| 2025-09-30 | $0.00                     | $119423543.42           |

**Total Gross Subscriptions (Month):** $29589818.40

**Total Gross Redemptions (Month):** $163573543.42

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-09-02 | 4.2000%           |
| 2025-09-03 | 4.2000%           |
| 2025-09-04 | 4.1900%           |
| 2025-09-05 | 4.1700%           |
| 2025-09-08 | 4.1600%           |
| 2025-09-09 | 4.1500%           |
| 2025-09-10 | 4.1400%           |
| 2025-09-11 | 4.1400%           |
| 2025-09-12 | 4.1200%           |
| 2025-09-15 | 4.1100%           |
| 2025-09-16 | 4.1100%           |
| 2025-09-17 | 4.1000%           |
| 2025-09-18 | 4.1000%           |
| 2025-09-19 | 4.0800%           |
| 2025-09-22 | 4.0700%           |
| 2025-09-23 | 4.0700%           |
| 2025-09-24 | 4.0600%           |
| 2025-09-25 | 4.0600%           |
| 2025-09-26 | 4.0500%           |
| 2025-09-29 | 4.0400%           |
| 2025-09-30 | 4.0400%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Non-financial corporation |  | 5.0100%          | 0.0000%              |
| Non-financial corporation |  | 37.3300%         | 0.0000%              |
| Non-financial corporation |  | 6.1100%          | 0.0000%              |
| Non-financial corporation |  | 15.2100%         | 0.0000%              |
| Non-financial corporation |  | 31.4200%         | 0.0000%              |

## Part C: Schedule of Portfolio Securities

### Security 1: U.S. Treasury Reserves Portfolio

- **C.1 - Title:** U.S. Treasury Reserves Portfolio
- **C.6 - Investment Category:** Investment Company
- **Identifiers:** C.3 - CUSIP: NA, C.5 - Other ID: LMUSTREASURYRES
- **C.18 - Value (incl. sponsor support):** $1398817442.32
- **C.18.a - Value (excl. sponsor support):** $1398817442.32
- **C.19 - Percentage of Net Assets:** 100.0000%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2025-10-01
- **C.12 - Maturity Date (WAL):** 2025-10-01
- **C.13 - Final Legal Maturity Date:** 2025-10-01
- **C.10 - Ratings:** Fitch, Inc.: NR; Moody's Investors Service, Inc.: NR; Standard and Poor's Ratings Services: NR
- **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:** Legg Mason Partners Institutional Trust

**Date:** 2025-10-07

**By:** /s/Christopher Berarducci

**Name of Signing Officer:** Christopher Berarducci

**Title of Signing Officer:** Principal Financial Officer