# EDGAR Filing Document

**Accession Number:** 0000889512
**File Stem:** 0001193125-26-259004
**Filing Date:** 2026-6
**Character Count:** 17572
**Document Hash:** 8b52637ea6cfca4bcc223f3875b81833
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-259004.hdr.sgml**: 20260605

**ACCESSION NUMBER**: 0001193125-26-259004

**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:** 261067932

**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):** 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 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:** $2157379468.26

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

- **Cash:** $0.00

- **Total Other Assets:** $11530.76

- **Total Liabilities:** $6792042.13

- **Net Assets of Series:** $2150598956.89

- **Number of Shares Outstanding (Series):** 2150646127.1000

- **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 | 3.6900%             |
| 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 | 3.6900%             |
| 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 | 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                      |
|  |  |

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

### Class: PC

- **Minimum Initial Investment:** $1.00

- **Net Assets of Class:** $2131712260.11

- **Number of Shares Outstanding:** 2131758735.3400

- **Expense Reimbursement/Waiver:** 388100.06

**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 | $535307.49                | $135687633.69           |
| 2026-05-04 | $143915572.32             | $254000.00              |
| 2026-05-05 | $168200126.90             | $0.00                   |
| 2026-05-06 | $120218373.66             | $0.00                   |
| 2026-05-07 | $0.00                     | $31636758.69            |
| 2026-05-08 | $0.00                     | $22710782.33            |
| 2026-05-11 | $96287230.28              | $35894836.82            |
| 2026-05-12 | $2863000.00               | $101163070.05           |
| 2026-05-13 | $181470342.60             | $69000.00               |
| 2026-05-14 | $100000000.00             | $76527138.07            |
| 2026-05-15 | $181974770.00             | $6903594.52             |
| 2026-05-18 | $203300000.00             | $3522351.26             |
| 2026-05-19 | $108625724.38             | $0.00                   |
| 2026-05-20 | $71836648.76              | $25389000.00            |
| 2026-05-21 | $324487801.29             | $0.00                   |
| 2026-05-22 | $169179808.05             | $143994286.55           |
| 2026-05-26 | $2461000.00               | $85174563.57            |
| 2026-05-27 | $157100489.13             | $20409000.00            |
| 2026-05-28 | $14392.43                 | $284052856.76           |
| 2026-05-29 | $0.00                     | $458158745.55           |

**Total Gross Subscriptions (Month):** $2032470587.29

**Total Gross Redemptions (Month):** $1431547617.86

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2026-05-01 | 3.5600%           |
| 2026-05-04 | 3.5600%           |
| 2026-05-05 | 3.5600%           |
| 2026-05-06 | 3.5600%           |
| 2026-05-07 | 3.5500%           |
| 2026-05-08 | 3.5600%           |
| 2026-05-11 | 3.5600%           |
| 2026-05-12 | 3.5600%           |
| 2026-05-13 | 3.5600%           |
| 2026-05-14 | 3.5600%           |
| 2026-05-15 | 3.5600%           |
| 2026-05-18 | 3.5600%           |
| 2026-05-19 | 3.5500%           |
| 2026-05-20 | 3.5500%           |
| 2026-05-21 | 3.5500%           |
| 2026-05-22 | 3.5500%           |
| 2026-05-26 | 3.5500%           |
| 2026-05-27 | 3.5500%           |
| 2026-05-28 | 3.5500%           |
| 2026-05-29 | 3.5500%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Non-financial corporation |  | 7.0500%          | 0.0000%              |
| Insurance company         |  | 23.5800%         | 0.0000%              |
| Non-financial corporation |  | 46.2900%         | 0.0000%              |
| Retail investor           |  | 14.7900%         | 0.0000%              |

### Class: CC

- **Minimum Initial Investment:** $200000000.00

- **Net Assets of Class:** $18886696.78

- **Number of Shares Outstanding:** 18887391.7600

- **Expense Reimbursement/Waiver:** 7581.85

**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 | $114988.58                | $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                     | $3060000.00             |
| 2026-05-08 | $0.00                     | $0.00                   |
| 2026-05-11 | $0.00                     | $830000.00              |
| 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                     | $7000000.00             |
| 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):** $114988.58

**Total Gross Redemptions (Month):** $10890000.00

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2026-05-01 | 3.5800%           |
| 2026-05-04 | 3.5800%           |
| 2026-05-05 | 3.5800%           |
| 2026-05-06 | 3.5800%           |
| 2026-05-07 | 3.5700%           |
| 2026-05-08 | 3.5800%           |
| 2026-05-11 | 3.5800%           |
| 2026-05-12 | 3.5800%           |
| 2026-05-13 | 3.5800%           |
| 2026-05-14 | 3.5800%           |
| 2026-05-15 | 3.5800%           |
| 2026-05-18 | 3.5800%           |
| 2026-05-19 | 3.5700%           |
| 2026-05-20 | 3.5700%           |
| 2026-05-21 | 3.5700%           |
| 2026-05-22 | 3.5700%           |
| 2026-05-26 | 3.5700%           |
| 2026-05-27 | 3.5700%           |
| 2026-05-28 | 3.5700%           |
| 2026-05-29 | 3.5700%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Non-financial corporation |  | 6.9700%          | 0.0000%              |
| Non-financial corporation |  | 53.1600%         | 0.0000%              |
| Non-financial corporation |  | 10.7700%         | 0.0000%              |
| Non-financial corporation |  | 11.3700%         | 0.0000%              |
| Non-financial corporation |  | 16.3500%         | 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):** $2157379468.26
- **C.18.a - Value (excl. sponsor support):** $2157379468.26
- **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