# EDGAR Filing Document

**Accession Number:** 0000889512
**File Stem:** 0001193125-25-233287
**Filing Date:** 2025-10
**Character Count:** 17665
**Document Hash:** 4d28164fee702c0aaccb16e1fa136ad2
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-233287.hdr.sgml**: 20251007

**ACCESSION NUMBER**: 0001193125-25-233287

**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:** 251379489

**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 Institutional U.S. Treasury Reserves (Series ID: S000008910)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000024239 | Institutional Shares | CIIXX           |
| C000089733 | Investor Shares      | LTRXX           |

# 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 Institutional U.S. Treasury Reserves

**LEI of Series:** 549300QC7GUBE6E4RH57

**EDGAR Series Identifier:** S000008910

**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:** $8171319090.35

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

- **Cash:** $0.00

- **Total Other Assets:** $105940.14

- **Total Liabilities:** $27980931.06

- **Net Assets of Series:** $8143444099.43

- **Number of Shares Outstanding (Series):** 8143928000.8400

- **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 | 0.9999                      |
|  |  |
| 2025-09-03 | 0.9999                      |
|  |  |
| 2025-09-04 | 0.9999                      |
|  |  |
| 2025-09-05 | 0.9999                      |
|  |  |
| 2025-09-08 | 0.9999                      |
|  |  |
| 2025-09-09 | 0.9999                      |
|  |  |
| 2025-09-10 | 0.9999                      |
|  |  |
| 2025-09-11 | 0.9999                      |
|  |  |
| 2025-09-12 | 0.9999                      |
|  |  |
| 2025-09-15 | 0.9999                      |
|  |  |
| 2025-09-16 | 0.9999                      |
|  |  |
| 2025-09-17 | 0.9999                      |
|  |  |
| 2025-09-18 | 0.9999                      |
|  |  |
| 2025-09-19 | 0.9999                      |
|  |  |
| 2025-09-22 | 0.9999                      |
|  |  |
| 2025-09-23 | 0.9999                      |
|  |  |
| 2025-09-24 | 0.9999                      |
|  |  |
| 2025-09-25 | 0.9999                      |
|  |  |
| 2025-09-26 | 0.9999                      |
|  |  |
| 2025-09-29 | 0.9999                      |
|  |  |
| 2025-09-30 | 0.9999                      |
|  |  |

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

### Class: 0L

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $4954045698.63

- **Number of Shares Outstanding:** 4954335508.9600

- **Expense Reimbursement/Waiver:** 609929.81

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-09-02 | 0.9999          |
|  |  |
| 2025-09-03 | 0.9999          |
|  |  |
| 2025-09-04 | 0.9999          |
|  |  |
| 2025-09-05 | 0.9999          |
|  |  |
| 2025-09-08 | 0.9999          |
|  |  |
| 2025-09-09 | 0.9999          |
|  |  |
| 2025-09-10 | 0.9999          |
|  |  |
| 2025-09-11 | 0.9999          |
|  |  |
| 2025-09-12 | 0.9999          |
|  |  |
| 2025-09-15 | 0.9999          |
|  |  |
| 2025-09-16 | 0.9999          |
|  |  |
| 2025-09-17 | 0.9999          |
|  |  |
| 2025-09-18 | 0.9999          |
|  |  |
| 2025-09-19 | 0.9999          |
|  |  |
| 2025-09-22 | 0.9999          |
|  |  |
| 2025-09-23 | 0.9999          |
|  |  |
| 2025-09-24 | 0.9999          |
|  |  |
| 2025-09-25 | 0.9999          |
|  |  |
| 2025-09-26 | 0.9999          |
|  |  |
| 2025-09-29 | 0.9999          |
|  |  |
| 2025-09-30 | 0.9999          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-09-02 | $37462571.82              | $64353168.45            |
| 2025-09-03 | $17688376.31              | $115077591.47           |
| 2025-09-04 | $294720842.51             | $20719509.19            |
| 2025-09-05 | $398852002.78             | $157057300.84           |
| 2025-09-08 | $118188097.37             | $56425450.94            |
| 2025-09-09 | $297097967.27             | $223362517.75           |
| 2025-09-10 | $12955019.15              | $24219638.74            |
| 2025-09-11 | $40288136.83              | $65441411.27            |
| 2025-09-12 | $29106634.63              | $96894708.09            |
| 2025-09-15 | $135377905.88             | $160847792.70           |
| 2025-09-16 | $46430730.31              | $61375823.75            |
| 2025-09-17 | $128261230.09             | $48053197.92            |
| 2025-09-18 | $322821156.94             | $24877311.00            |
| 2025-09-19 | $46972588.21              | $17146313.14            |
| 2025-09-22 | $12896269.81              | $31966204.60            |
| 2025-09-23 | $40556320.35              | $12694291.26            |
| 2025-09-24 | $16216859.68              | $185730281.33           |
| 2025-09-25 | $83300772.04              | $336775535.41           |
| 2025-09-26 | $22134723.55              | $26710443.68            |
| 2025-09-29 | $27582865.47              | $75814432.40            |
| 2025-09-30 | $30992181.97              | $196528261.81           |

**Total Gross Subscriptions (Month):** $2159903252.97

**Total Gross Redemptions (Month):** $2002071185.74

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-09-02 | 4.1400%           |
| 2025-09-03 | 4.1400%           |
| 2025-09-04 | 4.1300%           |
| 2025-09-05 | 4.1100%           |
| 2025-09-08 | 4.1000%           |
| 2025-09-09 | 4.0900%           |
| 2025-09-10 | 4.0800%           |
| 2025-09-11 | 4.0800%           |
| 2025-09-12 | 4.0600%           |
| 2025-09-15 | 4.0500%           |
| 2025-09-16 | 4.0500%           |
| 2025-09-17 | 4.0400%           |
| 2025-09-18 | 4.0400%           |
| 2025-09-19 | 4.0200%           |
| 2025-09-22 | 4.0100%           |
| 2025-09-23 | 4.0100%           |
| 2025-09-24 | 4.0000%           |
| 2025-09-25 | 4.0000%           |
| 2025-09-26 | 3.9900%           |
| 2025-09-29 | 3.9800%           |
| 2025-09-30 | 3.9800%           |

**Beneficial/Record Owner Categories**
| Category      | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Broker-dealer |  | 35.0700%         | 0.0000%              |
| Broker-dealer |  | 37.7700%         | 0.0000%              |

### Class: 0I

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $3189398400.80

- **Number of Shares Outstanding:** 3189592491.8800

- **Expense Reimbursement/Waiver:** 455001.14

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-09-02 | 0.9999          |
|  |  |
| 2025-09-03 | 0.9999          |
|  |  |
| 2025-09-04 | 0.9999          |
|  |  |
| 2025-09-05 | 0.9999          |
|  |  |
| 2025-09-08 | 0.9999          |
|  |  |
| 2025-09-09 | 0.9999          |
|  |  |
| 2025-09-10 | 0.9999          |
|  |  |
| 2025-09-11 | 0.9999          |
|  |  |
| 2025-09-12 | 0.9999          |
|  |  |
| 2025-09-15 | 0.9999          |
|  |  |
| 2025-09-16 | 0.9999          |
|  |  |
| 2025-09-17 | 0.9999          |
|  |  |
| 2025-09-18 | 0.9999          |
|  |  |
| 2025-09-19 | 0.9999          |
|  |  |
| 2025-09-22 | 0.9999          |
|  |  |
| 2025-09-23 | 0.9999          |
|  |  |
| 2025-09-24 | 0.9999          |
|  |  |
| 2025-09-25 | 0.9999          |
|  |  |
| 2025-09-26 | 0.9999          |
|  |  |
| 2025-09-29 | 0.9999          |
|  |  |
| 2025-09-30 | 0.9999          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-09-02 | $66124960.79              | $569574.32              |
| 2025-09-03 | $0.00                     | $17845295.14            |
| 2025-09-04 | $0.00                     | $65054113.50            |
| 2025-09-05 | $14851670.79              | $0.00                   |
| 2025-09-08 | $0.00                     | $18053485.52            |
| 2025-09-09 | $49799345.47              | $5000.00                |
| 2025-09-10 | $0.00                     | $225245072.43           |
| 2025-09-11 | $0.00                     | $1363349.70             |
| 2025-09-12 | $11204554.92              | $0.00                   |
| 2025-09-15 | $0.00                     | $39066116.77            |
| 2025-09-16 | $93175491.45              | $0.00                   |
| 2025-09-17 | $0.00                     | $37211138.77            |
| 2025-09-18 | $0.00                     | $186149483.49           |
| 2025-09-19 | $24314602.36              | $0.00                   |
| 2025-09-22 | $12605696.09              | $0.00                   |
| 2025-09-23 | $52969992.74              | $0.00                   |
| 2025-09-24 | $22661778.09              | $0.00                   |
| 2025-09-25 | $123807232.58             | $0.00                   |
| 2025-09-26 | $18554049.70              | $0.00                   |
| 2025-09-29 | $0.00                     | $12080018.14            |
| 2025-09-30 | $298363483.83             | $0.00                   |

**Total Gross Subscriptions (Month):** $788432858.81

**Total Gross Redemptions (Month):** $602642647.78

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-09-02 | 4.0900%           |
| 2025-09-03 | 4.0900%           |
| 2025-09-04 | 4.0800%           |
| 2025-09-05 | 4.0600%           |
| 2025-09-08 | 4.0500%           |
| 2025-09-09 | 4.0400%           |
| 2025-09-10 | 4.0300%           |
| 2025-09-11 | 4.0300%           |
| 2025-09-12 | 4.0100%           |
| 2025-09-15 | 4.0000%           |
| 2025-09-16 | 4.0000%           |
| 2025-09-17 | 3.9900%           |
| 2025-09-18 | 3.9900%           |
| 2025-09-19 | 3.9700%           |
| 2025-09-22 | 3.9600%           |
| 2025-09-23 | 3.9600%           |
| 2025-09-24 | 3.9500%           |
| 2025-09-25 | 3.9500%           |
| 2025-09-26 | 3.9400%           |
| 2025-09-29 | 3.9300%           |
| 2025-09-30 | 3.9300%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 99.6800%         | 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):** $8171319090.35
- **C.18.a - Value (excl. sponsor support):** $8171319090.35
- **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