# EDGAR Filing Document

**Accession Number:** 0000889512
**File Stem:** 0001145549-25-038827
**Filing Date:** 2025-6
**Character Count:** 17666
**Document Hash:** 51635908c9963a8f8bb63006bdc67377
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001145549-25-038827.hdr.sgml**: 20250606

**ACCESSION NUMBER**: 0001145549-25-038827

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250531

**FILED AS OF DATE**: 20250606

**DATE AS OF CHANGE**: 20250606

**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:** 251029708

**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):** 2025-05-31

**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:** $8162867491.80

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

- **Cash:** $0.00

- **Total Other Assets:** $104409.58

- **Total Liabilities:** $28770310.50

- **Net Assets of Series:** $8134201590.88

- **Number of Shares Outstanding (Series):** 8134691105.5600

- **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 (%)   |
|:---|:---|:---|:---|:---|
| 2025-05-01 | $18632215421.88           | $18632215421.88            | 99.9300%                  | 99.9300%                   |
| 2025-05-02 | $18589587552.00           | $18589587552.00            | 99.9200%                  | 99.9200%                   |
| 2025-05-05 | $19622075446.49           | $19622075446.49            | 99.9200%                  | 99.9200%                   |
| 2025-05-06 | $18232881865.61           | $18232881865.61            | 99.9100%                  | 99.9100%                   |
| 2025-05-07 | $18019972097.37           | $18019972097.37            | 99.9100%                  | 99.9100%                   |
| 2025-05-08 | $17887911213.26           | $17887911213.26            | 99.9100%                  | 99.9100%                   |
| 2025-05-09 | $17853032293.97           | $17853032293.97            | 99.9000%                  | 99.9000%                   |
| 2025-05-12 | $17885902698.20           | $17885902698.20            | 99.8900%                  | 99.8900%                   |
| 2025-05-13 | $17483678107.27           | $17483678107.27            | 99.8900%                  | 99.8900%                   |
| 2025-05-14 | $17465997064.68           | $17465997064.68            | 99.8800%                  | 99.8800%                   |
| 2025-05-15 | $17655081360.39           | $17655081360.39            | 99.8900%                  | 99.8900%                   |
| 2025-05-16 | $17996926635.11           | $17996926635.11            | 99.8800%                  | 99.8800%                   |
| 2025-05-19 | $18669507015.04           | $18669507015.04            | 99.8800%                  | 99.8800%                   |
| 2025-05-20 | $18457642945.92           | $18457642945.92            | 99.8800%                  | 99.8800%                   |
| 2025-05-21 | $17958272698.20           | $17958272698.20            | 99.8700%                  | 99.8700%                   |
| 2025-05-22 | $17730689475.32           | $17730689475.32            | 99.8600%                  | 99.8600%                   |
| 2025-05-23 | $17978166829.51           | $17978166829.51            | 99.8500%                  | 99.8500%                   |
| 2025-05-27 | $17902891281.98           | $17902891281.98            | 99.8500%                  | 99.8500%                   |
| 2025-05-28 | $17872400948.47           | $17872400948.47            | 99.8500%                  | 99.8500%                   |
| 2025-05-29 | $18321311708.07           | $18321311708.07            | 99.8500%                  | 99.8500%                   |
| 2025-05-30 | $18525833517.64           | $18525833517.64            | 99.8500%                  | 99.8500%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2025-05-01 | 4.3400%             |
| 2025-05-02 | 4.3300%             |
| 2025-05-05 | 4.3300%             |
| 2025-05-06 | 4.3300%             |
| 2025-05-07 | 4.3200%             |
| 2025-05-08 | 4.3200%             |
| 2025-05-09 | 4.3300%             |
| 2025-05-12 | 4.3300%             |
| 2025-05-13 | 4.3300%             |
| 2025-05-14 | 4.3300%             |
| 2025-05-15 | 4.3400%             |
| 2025-05-16 | 4.3400%             |
| 2025-05-19 | 4.3500%             |
| 2025-05-20 | 4.3500%             |
| 2025-05-21 | 4.3500%             |
| 2025-05-22 | 4.3500%             |
| 2025-05-23 | 4.3500%             |
| 2025-05-27 | 4.3500%             |
| 2025-05-28 | 4.3500%             |
| 2025-05-29 | 4.3400%             |
| 2025-05-30 | 4.3400%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2025-05-01 | 0.9999                      |
|  |  |
| 2025-05-02 | 0.9999                      |
|  |  |
| 2025-05-05 | 0.9999                      |
|  |  |
| 2025-05-06 | 0.9999                      |
|  |  |
| 2025-05-07 | 0.9999                      |
|  |  |
| 2025-05-08 | 0.9999                      |
|  |  |
| 2025-05-09 | 0.9999                      |
|  |  |
| 2025-05-12 | 0.9999                      |
|  |  |
| 2025-05-13 | 0.9999                      |
|  |  |
| 2025-05-14 | 0.9999                      |
|  |  |
| 2025-05-15 | 0.9999                      |
|  |  |
| 2025-05-16 | 0.9999                      |
|  |  |
| 2025-05-19 | 0.9999                      |
|  |  |
| 2025-05-20 | 0.9999                      |
|  |  |
| 2025-05-21 | 0.9999                      |
|  |  |
| 2025-05-22 | 0.9999                      |
|  |  |
| 2025-05-23 | 0.9999                      |
|  |  |
| 2025-05-27 | 0.9999                      |
|  |  |
| 2025-05-28 | 0.9999                      |
|  |  |
| 2025-05-29 | 0.9999                      |
|  |  |
| 2025-05-30 | 0.9999                      |
|  |  |

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

### Class: 0L

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $5303965950.54

- **Number of Shares Outstanding:** 5304269550.9900

- **Expense Reimbursement/Waiver:** 625522.26

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-05-01 | 0.9999          |
|  |  |
| 2025-05-02 | 0.9999          |
|  |  |
| 2025-05-05 | 0.9999          |
|  |  |
| 2025-05-06 | 0.9999          |
|  |  |
| 2025-05-07 | 0.9999          |
|  |  |
| 2025-05-08 | 0.9999          |
|  |  |
| 2025-05-09 | 0.9999          |
|  |  |
| 2025-05-12 | 0.9999          |
|  |  |
| 2025-05-13 | 0.9999          |
|  |  |
| 2025-05-14 | 0.9999          |
|  |  |
| 2025-05-15 | 0.9999          |
|  |  |
| 2025-05-16 | 0.9999          |
|  |  |
| 2025-05-19 | 0.9999          |
|  |  |
| 2025-05-20 | 0.9999          |
|  |  |
| 2025-05-21 | 0.9999          |
|  |  |
| 2025-05-22 | 0.9999          |
|  |  |
| 2025-05-23 | 0.9999          |
|  |  |
| 2025-05-27 | 0.9999          |
|  |  |
| 2025-05-28 | 0.9999          |
|  |  |
| 2025-05-29 | 0.9999          |
|  |  |
| 2025-05-30 | 0.9999          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-05-01 | $159979651.94             | $84829205.78            |
| 2025-05-02 | $218492855.31             | $175286130.87           |
| 2025-05-05 | $234549771.28             | $113445828.06           |
| 2025-05-06 | $37621112.73              | $139799178.85           |
| 2025-05-07 | $13470186.97              | $38244233.45            |
| 2025-05-08 | $10656533.48              | $33390760.66            |
| 2025-05-09 | $70709989.46              | $195324935.79           |
| 2025-05-12 | $10542331.79              | $101450084.78           |
| 2025-05-13 | $32530230.62              | $45839747.83            |
| 2025-05-14 | $30952365.38              | $20228411.42            |
| 2025-05-15 | $112943278.38             | $40183478.50            |
| 2025-05-16 | $72118923.69              | $10443655.34            |
| 2025-05-19 | $124195605.69             | $15798205.34            |
| 2025-05-20 | $6360546.65               | $41813173.38            |
| 2025-05-21 | $69315996.76              | $49078481.16            |
| 2025-05-22 | $59889028.50              | $46126372.17            |
| 2025-05-23 | $34898869.45              | $20555035.57            |
| 2025-05-27 | $72867108.08              | $113683004.71           |
| 2025-05-28 | $11526598.28              | $44789230.77            |
| 2025-05-29 | $89640256.50              | $80084169.55            |
| 2025-05-30 | $333811047.16             | $105216928.35           |

**Total Gross Subscriptions (Month):** $1807072288.10

**Total Gross Redemptions (Month):** $1515610252.33

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-05-01 | 4.1600%           |
| 2025-05-02 | 4.1500%           |
| 2025-05-05 | 4.1500%           |
| 2025-05-06 | 4.1500%           |
| 2025-05-07 | 4.1400%           |
| 2025-05-08 | 4.1400%           |
| 2025-05-09 | 4.1500%           |
| 2025-05-12 | 4.1500%           |
| 2025-05-13 | 4.1500%           |
| 2025-05-14 | 4.1500%           |
| 2025-05-15 | 4.1600%           |
| 2025-05-16 | 4.1600%           |
| 2025-05-19 | 4.1700%           |
| 2025-05-20 | 4.1700%           |
| 2025-05-21 | 4.1700%           |
| 2025-05-22 | 4.1700%           |
| 2025-05-23 | 4.1700%           |
| 2025-05-27 | 4.1700%           |
| 2025-05-28 | 4.1700%           |
| 2025-05-29 | 4.1600%           |
| 2025-05-30 | 4.1600%           |

**Beneficial/Record Owner Categories**
| Category      | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Broker-dealer |  | 35.5200%         | 0.0000%              |
| Broker-dealer |  | 29.0400%         | 0.0000%              |

### Class: 0I

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $2830235640.34

- **Number of Shares Outstanding:** 2830421554.5700

- **Expense Reimbursement/Waiver:** 416462.04

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-05-01 | 0.9999          |
|  |  |
| 2025-05-02 | 0.9999          |
|  |  |
| 2025-05-05 | 0.9999          |
|  |  |
| 2025-05-06 | 0.9999          |
|  |  |
| 2025-05-07 | 0.9999          |
|  |  |
| 2025-05-08 | 0.9999          |
|  |  |
| 2025-05-09 | 0.9999          |
|  |  |
| 2025-05-12 | 0.9999          |
|  |  |
| 2025-05-13 | 0.9999          |
|  |  |
| 2025-05-14 | 0.9999          |
|  |  |
| 2025-05-15 | 0.9999          |
|  |  |
| 2025-05-16 | 0.9999          |
|  |  |
| 2025-05-19 | 0.9999          |
|  |  |
| 2025-05-20 | 0.9999          |
|  |  |
| 2025-05-21 | 0.9999          |
|  |  |
| 2025-05-22 | 0.9999          |
|  |  |
| 2025-05-23 | 0.9999          |
|  |  |
| 2025-05-27 | 0.9999          |
|  |  |
| 2025-05-28 | 0.9999          |
|  |  |
| 2025-05-29 | 0.9999          |
|  |  |
| 2025-05-30 | 0.9999          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-05-01 | $34685891.52              | $541755.32              |
| 2025-05-02 | $13438214.87              | $0.00                   |
| 2025-05-05 | $29062429.24              | $0.00                   |
| 2025-05-06 | $30668047.41              | $0.00                   |
| 2025-05-07 | $0.00                     | $127846383.60           |
| 2025-05-08 | $0.00                     | $89720743.69            |
| 2025-05-09 | $81195671.60              | $0.00                   |
| 2025-05-12 | $0.00                     | $12885200.07            |
| 2025-05-13 | $19516748.02              | $0.00                   |
| 2025-05-14 | $0.00                     | $133152731.87           |
| 2025-05-15 | $5567134.50               | $173100.00              |
| 2025-05-16 | $41909115.74              | $30000.00               |
| 2025-05-19 | $61399686.13              | $0.00                   |
| 2025-05-20 | $14223929.33              | $0.00                   |
| 2025-05-21 | $0.00                     | $315721920.40           |
| 2025-05-22 | $143056176.79             | $0.00                   |
| 2025-05-23 | $334570378.74             | $0.00                   |
| 2025-05-27 | $10561077.52              | $0.00                   |
| 2025-05-28 | $5479158.96               | $0.00                   |
| 2025-05-29 | $184333512.15             | $0.00                   |
| 2025-05-30 | $16060240.39              | $0.00                   |

**Total Gross Subscriptions (Month):** $1025727412.91

**Total Gross Redemptions (Month):** $680071834.95

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-05-01 | 4.1100%           |
| 2025-05-02 | 4.1000%           |
| 2025-05-05 | 4.1000%           |
| 2025-05-06 | 4.1000%           |
| 2025-05-07 | 4.0900%           |
| 2025-05-08 | 4.0900%           |
| 2025-05-09 | 4.1000%           |
| 2025-05-12 | 4.1000%           |
| 2025-05-13 | 4.1000%           |
| 2025-05-14 | 4.1000%           |
| 2025-05-15 | 4.1100%           |
| 2025-05-16 | 4.1100%           |
| 2025-05-19 | 4.1200%           |
| 2025-05-20 | 4.1200%           |
| 2025-05-21 | 4.1200%           |
| 2025-05-22 | 4.1200%           |
| 2025-05-23 | 4.1200%           |
| 2025-05-27 | 4.1200%           |
| 2025-05-28 | 4.1200%           |
| 2025-05-29 | 4.1100%           |
| 2025-05-30 | 4.1100%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 99.5300%         | 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):** $8162867491.80
- **C.18.a - Value (excl. sponsor support):** $8162867491.80
- **C.19 - Percentage of Net Assets:** 100.0000%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2025-06-02
- **C.12 - Maturity Date (WAL):** 2025-06-02
- **C.13 - Final Legal Maturity Date:** 2025-06-02
- **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:** 2025-06-06

**By:** /s/Christopher Berarducci

**Name of Signing Officer:** Christopher Berarducci

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