# EDGAR Filing Document

**Accession Number:** 0000889512
**File Stem:** 0001193125-26-258998
**Filing Date:** 2026-6
**Character Count:** 20900
**Document Hash:** 3b75769a4e187638eff7e963dd4c76aa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-258998.hdr.sgml**: 20260605

**ACCESSION NUMBER**: 0001193125-26-258998

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260531

**FILED AS OF DATE**: 20260605

**DATE AS OF CHANGE**: 20260605

**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:** 261067926

**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           |
| C000266548 | Digital Institutional Shares | DIGXX           |

# 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):** 2026-05-31

**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:** 3

**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:** $8356397851.64

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

- **Cash:** $0.00

- **Total Other Assets:** $81214.33

- **Total Liabilities:** $22999492.12

- **Net Assets of Series:** $8333479573.85

- **Number of Shares Outstanding (Series):** 8333837963.3600

- **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 (%)   |
|:---|:---|:---|:---|:---|
| 2026-05-01 | $18163239002.55           | $18163239002.55            | 99.8800%                  | 99.8800%                   |
| 2026-05-04 | $18424120554.87           | $18424120554.87            | 99.8800%                  | 99.8800%                   |
| 2026-05-05 | $17881127009.24           | $17881127009.24            | 99.8700%                  | 99.8700%                   |
| 2026-05-06 | $17722640404.67           | $17722640404.67            | 99.8700%                  | 99.8700%                   |
| 2026-05-07 | $17664029045.11           | $17664029045.11            | 99.8600%                  | 99.8600%                   |
| 2026-05-08 | $18086387547.94           | $18086387547.94            | 99.8500%                  | 99.8500%                   |
| 2026-05-11 | $18648330823.41           | $18648330823.41            | 99.8500%                  | 99.8500%                   |
| 2026-05-12 | $19873986852.75           | $19873986852.75            | 99.8600%                  | 99.8600%                   |
| 2026-05-13 | $20127977900.45           | $20127977900.45            | 99.8600%                  | 99.8600%                   |
| 2026-05-14 | $19152975150.98           | $19152975150.98            | 99.8500%                  | 99.8500%                   |
| 2026-05-15 | $19206778602.29           | $19206778602.29            | 99.8400%                  | 99.8400%                   |
| 2026-05-18 | $20032694698.36           | $20032694698.36            | 99.8400%                  | 99.8400%                   |
| 2026-05-19 | $20692353615.12           | $20692353615.12            | 99.8500%                  | 99.8500%                   |
| 2026-05-20 | $21574995663.90           | $21574995663.90            | 99.8500%                  | 99.8500%                   |
| 2026-05-21 | $21423883870.04           | $21423883870.04            | 99.8400%                  | 99.8400%                   |
| 2026-05-22 | $21697138906.87           | $21697138906.87            | 99.8400%                  | 99.8400%                   |
| 2026-05-26 | $21558065524.27           | $21558065524.27            | 99.8300%                  | 99.8300%                   |
| 2026-05-27 | $22737306517.08           | $22737306517.08            | 99.8400%                  | 99.8400%                   |
| 2026-05-28 | $22600340155.99           | $22600340155.99            | 99.8300%                  | 99.8300%                   |
| 2026-05-29 | $21093145940.20           | $21093145940.20            | 99.8200%                  | 99.8200%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2026-05-01 | 3.7000%             |
| 2026-05-04 | 3.7000%             |
| 2026-05-05 | 3.7000%             |
| 2026-05-06 | 3.7000%             |
| 2026-05-07 | 3.7000%             |
| 2026-05-08 | 3.7000%             |
| 2026-05-11 | 3.7000%             |
| 2026-05-12 | 3.7000%             |
| 2026-05-13 | 3.7000%             |
| 2026-05-14 | 3.7000%             |
| 2026-05-15 | 3.7000%             |
| 2026-05-18 | 3.7000%             |
| 2026-05-19 | 3.7000%             |
| 2026-05-20 | 3.6900%             |
| 2026-05-21 | 3.6900%             |
| 2026-05-22 | 3.6900%             |
| 2026-05-26 | 3.6900%             |
| 2026-05-27 | 3.6900%             |
| 2026-05-28 | 3.6900%             |
| 2026-05-29 | 3.6900%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2026-05-01 | 0.9999                      |
|  |  |
| 2026-05-04 | 0.9999                      |
|  |  |
| 2026-05-05 | 1.0000                      |
|  |  |
| 2026-05-06 | 0.9999                      |
|  |  |
| 2026-05-07 | 0.9999                      |
|  |  |
| 2026-05-08 | 0.9999                      |
|  |  |
| 2026-05-11 | 0.9999                      |
|  |  |
| 2026-05-12 | 0.9999                      |
|  |  |
| 2026-05-13 | 0.9999                      |
|  |  |
| 2026-05-14 | 1.0000                      |
|  |  |
| 2026-05-15 | 1.0000                      |
|  |  |
| 2026-05-18 | 0.9999                      |
|  |  |
| 2026-05-19 | 1.0000                      |
|  |  |
| 2026-05-20 | 1.0000                      |
|  |  |
| 2026-05-21 | 1.0000                      |
|  |  |
| 2026-05-22 | 1.0000                      |
|  |  |
| 2026-05-26 | 1.0000                      |
|  |  |
| 2026-05-27 | 1.0000                      |
|  |  |
| 2026-05-28 | 1.0000                      |
|  |  |
| 2026-05-29 | 1.0000                      |
|  |  |

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

### Class: 0L

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $5079699475.01

- **Number of Shares Outstanding:** 5079938889.2600

- **Expense Reimbursement/Waiver:** 581354.92

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2026-05-01 | 0.9999          |
|  |  |
| 2026-05-04 | 0.9999          |
|  |  |
| 2026-05-05 | 0.9999          |
|  |  |
| 2026-05-06 | 0.9999          |
|  |  |
| 2026-05-07 | 0.9999          |
|  |  |
| 2026-05-08 | 0.9999          |
|  |  |
| 2026-05-11 | 0.9999          |
|  |  |
| 2026-05-12 | 0.9999          |
|  |  |
| 2026-05-13 | 0.9999          |
|  |  |
| 2026-05-14 | 1.0000          |
|  |  |
| 2026-05-15 | 1.0000          |
|  |  |
| 2026-05-18 | 0.9999          |
|  |  |
| 2026-05-19 | 1.0000          |
|  |  |
| 2026-05-20 | 1.0000          |
|  |  |
| 2026-05-21 | 1.0000          |
|  |  |
| 2026-05-22 | 1.0000          |
|  |  |
| 2026-05-26 | 0.9999          |
|  |  |
| 2026-05-27 | 1.0000          |
|  |  |
| 2026-05-28 | 0.9999          |
|  |  |
| 2026-05-29 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2026-05-01 | $28649998.33              | $271488413.17           |
| 2026-05-04 | $19391727.86              | $77638774.02            |
| 2026-05-05 | $160471505.43             | $5936846.64             |
| 2026-05-06 | $60784525.83              | $85474592.33            |
| 2026-05-07 | $31827026.22              | $41246735.27            |
| 2026-05-08 | $137075782.11             | $88486067.72            |
| 2026-05-11 | $75862207.81              | $15897599.54            |
| 2026-05-12 | $37325523.78              | $6434010.46             |
| 2026-05-13 | $48156699.70              | $43106929.27            |
| 2026-05-14 | $810897298.32             | $515256374.95           |
| 2026-05-15 | $38183595.65              | $146059320.87           |
| 2026-05-18 | $20013038.68              | $81785414.58            |
| 2026-05-19 | $85295556.79              | $50755664.19            |
| 2026-05-20 | $78747907.43              | $19766698.33            |
| 2026-05-21 | $184036703.49             | $189246829.62           |
| 2026-05-22 | $55659695.96              | $22193587.04            |
| 2026-05-26 | $39270025.50              | $153499079.40           |
| 2026-05-27 | $100105575.27             | $24529344.71            |
| 2026-05-28 | $18090618.37              | $148152227.01           |
| 2026-05-29 | $536830211.56             | $163191649.87           |

**Total Gross Subscriptions (Month):** $2566675224.09

**Total Gross Redemptions (Month):** $2150146158.99

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2026-05-01 | 3.5200%           |
| 2026-05-04 | 3.5200%           |
| 2026-05-05 | 3.5200%           |
| 2026-05-06 | 3.5200%           |
| 2026-05-07 | 3.5100%           |
| 2026-05-08 | 3.5200%           |
| 2026-05-11 | 3.5200%           |
| 2026-05-12 | 3.5200%           |
| 2026-05-13 | 3.5200%           |
| 2026-05-14 | 3.5200%           |
| 2026-05-15 | 3.5200%           |
| 2026-05-18 | 3.5200%           |
| 2026-05-19 | 3.5200%           |
| 2026-05-20 | 3.5100%           |
| 2026-05-21 | 3.5100%           |
| 2026-05-22 | 3.5100%           |
| 2026-05-26 | 3.5100%           |
| 2026-05-27 | 3.5100%           |
| 2026-05-28 | 3.5100%           |
| 2026-05-29 | 3.5100%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Non-financial corporation |  | 5.4900%          | 0.0000%              |
| Broker-dealer             |  | 5.1100%          | 0.0000%              |
| Broker-dealer             |  | 32.7600%         | 0.0000%              |
| Broker-dealer             |  | 37.4400%         | 0.0000%              |

### Class: 0I

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $3253680098.52

- **Number of Shares Outstanding:** 3253799074.1000

- **Expense Reimbursement/Waiver:** 445619.89

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2026-05-01 | 1.0000          |
|  |  |
| 2026-05-04 | 1.0000          |
|  |  |
| 2026-05-05 | 1.0000          |
|  |  |
| 2026-05-06 | 1.0000          |
|  |  |
| 2026-05-07 | 1.0000          |
|  |  |
| 2026-05-08 | 0.9999          |
|  |  |
| 2026-05-11 | 1.0000          |
|  |  |
| 2026-05-12 | 1.0000          |
|  |  |
| 2026-05-13 | 1.0000          |
|  |  |
| 2026-05-14 | 0.9999          |
|  |  |
| 2026-05-15 | 0.9999          |
|  |  |
| 2026-05-18 | 1.0000          |
|  |  |
| 2026-05-19 | 1.0000          |
|  |  |
| 2026-05-20 | 1.0000          |
|  |  |
| 2026-05-21 | 1.0000          |
|  |  |
| 2026-05-22 | 1.0000          |
|  |  |
| 2026-05-26 | 1.0000          |
|  |  |
| 2026-05-27 | 1.0000          |
|  |  |
| 2026-05-28 | 1.0000          |
|  |  |
| 2026-05-29 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2026-05-01 | $7310746.20               | $82198868.07            |
| 2026-05-04 | $0.00                     | $8253381.01             |
| 2026-05-05 | $26683036.80              | $149.95                 |
| 2026-05-06 | $0.00                     | $249877110.59           |
| 2026-05-07 | $0.00                     | $95883303.17            |
| 2026-05-08 | $60103794.29              | $0.00                   |
| 2026-05-11 | $0.00                     | $65919003.73            |
| 2026-05-12 | $28601327.82              | $0.00                   |
| 2026-05-13 | $16049537.71              | $7000.00                |
| 2026-05-14 | $0.00                     | $127636800.20           |
| 2026-05-15 | $24264232.22              | $0.00                   |
| 2026-05-18 | $17246148.22              | $0.00                   |
| 2026-05-19 | $68148354.33              | $60000.00               |
| 2026-05-20 | $116870896.94             | $20623.67               |
| 2026-05-21 | $0.00                     | $107344454.87           |
| 2026-05-22 | $347017017.06             | $34841.07               |
| 2026-05-26 | $79513463.43              | $0.00                   |
| 2026-05-27 | $316703130.11             | $0.00                   |
| 2026-05-28 | $43242482.79              | $0.00                   |
| 2026-05-29 | $5487037.05               | $0.00                   |

**Total Gross Subscriptions (Month):** $1157241204.97

**Total Gross Redemptions (Month):** $737235536.33

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2026-05-01 | 3.4700%           |
| 2026-05-04 | 3.4700%           |
| 2026-05-05 | 3.4700%           |
| 2026-05-06 | 3.4700%           |
| 2026-05-07 | 3.4600%           |
| 2026-05-08 | 3.4700%           |
| 2026-05-11 | 3.4700%           |
| 2026-05-12 | 3.4700%           |
| 2026-05-13 | 3.4700%           |
| 2026-05-14 | 3.4700%           |
| 2026-05-15 | 3.4700%           |
| 2026-05-18 | 3.4700%           |
| 2026-05-19 | 3.4700%           |
| 2026-05-20 | 3.4600%           |
| 2026-05-21 | 3.4600%           |
| 2026-05-22 | 3.4600%           |
| 2026-05-26 | 3.4600%           |
| 2026-05-27 | 3.4600%           |
| 2026-05-28 | 3.4600%           |
| 2026-05-29 | 3.4600%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 99.7200%         | 0.0000%              |

### Class: DL

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $100000.32

- **Number of Shares Outstanding:** 100000.0000

- **Expense Reimbursement/Waiver:** 2296.87

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2026-05-01 | 1.0000          |
|  |  |
| 2026-05-04 | 1.0000          |
|  |  |
| 2026-05-05 | 1.0000          |
|  |  |
| 2026-05-06 | 1.0000          |
|  |  |
| 2026-05-07 | 1.0000          |
|  |  |
| 2026-05-08 | 1.0000          |
|  |  |
| 2026-05-11 | 1.0000          |
|  |  |
| 2026-05-12 | 1.0000          |
|  |  |
| 2026-05-13 | 1.0000          |
|  |  |
| 2026-05-14 | 1.0000          |
|  |  |
| 2026-05-15 | 1.0000          |
|  |  |
| 2026-05-18 | 1.0000          |
|  |  |
| 2026-05-19 | 1.0000          |
|  |  |
| 2026-05-20 | 1.0000          |
|  |  |
| 2026-05-21 | 1.0000          |
|  |  |
| 2026-05-22 | 1.0000          |
|  |  |
| 2026-05-26 | 1.0000          |
|  |  |
| 2026-05-27 | 1.0000          |
|  |  |
| 2026-05-28 | 1.0000          |
|  |  |
| 2026-05-29 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2026-05-01 | $0.00                     | $0.00                   |
| 2026-05-04 | $0.00                     | $0.00                   |
| 2026-05-05 | $0.00                     | $0.00                   |
| 2026-05-06 | $0.00                     | $0.00                   |
| 2026-05-07 | $0.00                     | $0.00                   |
| 2026-05-08 | $0.00                     | $0.00                   |
| 2026-05-11 | $0.00                     | $0.00                   |
| 2026-05-12 | $0.00                     | $0.00                   |
| 2026-05-13 | $0.00                     | $0.00                   |
| 2026-05-14 | $0.00                     | $0.00                   |
| 2026-05-15 | $0.00                     | $0.00                   |
| 2026-05-18 | $0.00                     | $0.00                   |
| 2026-05-19 | $0.00                     | $0.00                   |
| 2026-05-20 | $0.00                     | $0.00                   |
| 2026-05-21 | $0.00                     | $0.00                   |
| 2026-05-22 | $0.00                     | $0.00                   |
| 2026-05-26 | $0.00                     | $0.00                   |
| 2026-05-27 | $0.00                     | $0.00                   |
| 2026-05-28 | $0.00                     | $0.00                   |
| 2026-05-29 | $0.00                     | $0.00                   |

**Total Gross Subscriptions (Month):** $0.00

**Total Gross Redemptions (Month):** $0.00

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2026-05-01 | 3.5200%           |
| 2026-05-04 | 3.5200%           |
| 2026-05-05 | 3.5200%           |
| 2026-05-06 | 3.5200%           |
| 2026-05-07 | 3.5200%           |
| 2026-05-08 | 3.5200%           |
| 2026-05-11 | 3.5200%           |
| 2026-05-12 | 3.5200%           |
| 2026-05-13 | 3.5200%           |
| 2026-05-14 | 3.5200%           |
| 2026-05-15 | 3.5200%           |
| 2026-05-18 | 3.5200%           |
| 2026-05-19 | 3.5200%           |
| 2026-05-20 | 3.5200%           |
| 2026-05-21 | 3.5100%           |
| 2026-05-22 | 3.5100%           |
| 2026-05-26 | 3.5100%           |
| 2026-05-27 | 3.5100%           |
| 2026-05-28 | 3.5100%           |
| 2026-05-29 | 3.5100%           |

## 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):** $8356397851.64
- **C.18.a - Value (excl. sponsor support):** $8356397851.64
- **C.19 - Percentage of Net Assets:** 100.0000%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2026-06-01
- **C.12 - Maturity Date (WAL):** 2026-06-01
- **C.13 - Final Legal Maturity Date:** 2026-06-01
- **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:** 2026-06-05

**By:** /s/Christopher Berarducci

**Name of Signing Officer:** Christopher Berarducci

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