# EDGAR Filing Document

**Accession Number:** 0000889512
**File Stem:** 0001193125-26-145274
**Filing Date:** 2026-4
**Character Count:** 18515
**Document Hash:** 0e3fbfcf9bd298f643539959e2e3b38b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-145274.hdr.sgml**: 20260407

**ACCESSION NUMBER**: 0001193125-26-145274

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260407

**DATE AS OF CHANGE**: 20260407

**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:** 26844212

**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):** 2026-03-31

**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:** $1178429131.82

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

- **Cash:** $0.00

- **Total Other Assets:** $20531.65

- **Total Liabilities:** $4045737.09

- **Net Assets of Series:** $1174403926.38

- **Number of Shares Outstanding (Series):** 1174413206.1200

- **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 (%)   |
|:---|:---|:---|:---|:---|
| 2026-03-02 | $17903608082.80           | $17903608082.80            | 99.8700%                  | 99.8700%                   |
| 2026-03-03 | $17798685733.67           | $17798685733.67            | 99.8600%                  | 99.8600%                   |
| 2026-03-04 | $17894014163.33           | $17894014163.33            | 99.8600%                  | 99.8600%                   |
| 2026-03-05 | $17702668570.16           | $17702668570.16            | 99.8600%                  | 99.8600%                   |
| 2026-03-06 | $17610210220.02           | $17610210220.02            | 99.8500%                  | 99.8500%                   |
| 2026-03-09 | $18123283639.34           | $18123283639.34            | 99.8400%                  | 99.8400%                   |
| 2026-03-10 | $16693116063.09           | $16693116063.09            | 99.8300%                  | 99.8300%                   |
| 2026-03-11 | $16445956815.71           | $16445956815.71            | 99.8200%                  | 99.8200%                   |
| 2026-03-12 | $16619780088.40           | $16619780088.40            | 99.8200%                  | 99.8200%                   |
| 2026-03-13 | $16321050314.14           | $16321050314.14            | 99.8100%                  | 99.8100%                   |
| 2026-03-16 | $16746714784.19           | $16746714784.19            | 99.8100%                  | 99.8100%                   |
| 2026-03-17 | $16562653517.02           | $16562653517.02            | 99.8000%                  | 99.8000%                   |
| 2026-03-18 | $16918495874.84           | $16918495874.84            | 99.8000%                  | 99.8000%                   |
| 2026-03-19 | $16848547580.42           | $16848547580.42            | 99.7900%                  | 99.7900%                   |
| 2026-03-20 | $19481410339.44           | $19481410339.44            | 99.8100%                  | 99.8100%                   |
| 2026-03-23 | $19226113369.11           | $19226113369.11            | 99.8000%                  | 99.8000%                   |
| 2026-03-24 | $19276500358.27           | $19276500358.27            | 99.8000%                  | 99.8000%                   |
| 2026-03-25 | $19563755336.22           | $19563755336.22            | 99.7900%                  | 99.7900%                   |
| 2026-03-26 | $18988799677.94           | $18988799677.94            | 99.7900%                  | 99.7900%                   |
| 2026-03-27 | $19193117391.03           | $19193117391.03            | 99.7800%                  | 99.7800%                   |
| 2026-03-30 | $19376740641.62           | $19376740641.62            | 99.7800%                  | 99.7800%                   |
| 2026-03-31 | $18858541605.08           | $18858541605.08            | 99.8100%                  | 99.8100%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2026-03-02 | 3.7200%             |
| 2026-03-03 | 3.7200%             |
| 2026-03-04 | 3.7100%             |
| 2026-03-05 | 3.7100%             |
| 2026-03-06 | 3.7100%             |
| 2026-03-09 | 3.7100%             |
| 2026-03-10 | 3.7100%             |
| 2026-03-11 | 3.7100%             |
| 2026-03-12 | 3.7100%             |
| 2026-03-13 | 3.7100%             |
| 2026-03-16 | 3.7100%             |
| 2026-03-17 | 3.7100%             |
| 2026-03-18 | 3.7100%             |
| 2026-03-19 | 3.7100%             |
| 2026-03-20 | 3.7100%             |
| 2026-03-23 | 3.7100%             |
| 2026-03-24 | 3.7100%             |
| 2026-03-25 | 3.7100%             |
| 2026-03-26 | 3.7100%             |
| 2026-03-27 | 3.7200%             |
| 2026-03-30 | 3.7200%             |
| 2026-03-31 | 3.7200%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2026-03-02 | 1.0000                      |
|  |  |
| 2026-03-03 | 1.0000                      |
|  |  |
| 2026-03-04 | 1.0000                      |
|  |  |
| 2026-03-05 | 1.0000                      |
|  |  |
| 2026-03-06 | 1.0000                      |
|  |  |
| 2026-03-09 | 1.0000                      |
|  |  |
| 2026-03-10 | 1.0000                      |
|  |  |
| 2026-03-11 | 1.0000                      |
|  |  |
| 2026-03-12 | 1.0000                      |
|  |  |
| 2026-03-13 | 1.0000                      |
|  |  |
| 2026-03-16 | 1.0000                      |
|  |  |
| 2026-03-17 | 1.0000                      |
|  |  |
| 2026-03-18 | 1.0000                      |
|  |  |
| 2026-03-19 | 1.0000                      |
|  |  |
| 2026-03-20 | 1.0000                      |
|  |  |
| 2026-03-23 | 1.0000                      |
|  |  |
| 2026-03-24 | 1.0000                      |
|  |  |
| 2026-03-25 | 1.0000                      |
|  |  |
| 2026-03-26 | 1.0000                      |
|  |  |
| 2026-03-27 | 1.0000                      |
|  |  |
| 2026-03-30 | 1.0000                      |
|  |  |
| 2026-03-31 | 1.0000                      |
|  |  |

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

### Class: PC

- **Minimum Initial Investment:** $1.00

- **Net Assets of Class:** $1140159957.38

- **Number of Shares Outstanding:** 1140169147.6200

- **Expense Reimbursement/Waiver:** 246923.69

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2026-03-02 | 1.0000          |
|  |  |
| 2026-03-03 | 1.0000          |
|  |  |
| 2026-03-04 | 1.0000          |
|  |  |
| 2026-03-05 | 1.0000          |
|  |  |
| 2026-03-06 | 1.0000          |
|  |  |
| 2026-03-09 | 1.0000          |
|  |  |
| 2026-03-10 | 1.0000          |
|  |  |
| 2026-03-11 | 1.0000          |
|  |  |
| 2026-03-12 | 1.0000          |
|  |  |
| 2026-03-13 | 1.0000          |
|  |  |
| 2026-03-16 | 1.0000          |
|  |  |
| 2026-03-17 | 1.0000          |
|  |  |
| 2026-03-18 | 1.0000          |
|  |  |
| 2026-03-19 | 1.0000          |
|  |  |
| 2026-03-20 | 1.0000          |
|  |  |
| 2026-03-23 | 1.0000          |
|  |  |
| 2026-03-24 | 1.0000          |
|  |  |
| 2026-03-25 | 1.0000          |
|  |  |
| 2026-03-26 | 1.0000          |
|  |  |
| 2026-03-27 | 1.0000          |
|  |  |
| 2026-03-30 | 1.0000          |
|  |  |
| 2026-03-31 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2026-03-02 | $973391.56                | $40756189.06            |
| 2026-03-03 | $59924491.62              | $0.00                   |
| 2026-03-04 | $0.00                     | $51792901.36            |
| 2026-03-05 | $30886760.37              | $0.16                   |
| 2026-03-06 | $0.00                     | $94548983.79            |
| 2026-03-09 | $0.00                     | $31131677.00            |
| 2026-03-10 | $12794220.00              | $150000000.00           |
| 2026-03-11 | $0.00                     | $58602773.36            |
| 2026-03-12 | $64555546.93              | $0.00                   |
| 2026-03-13 | $0.00                     | $35624808.50            |
| 2026-03-16 | $95473617.86              | $0.00                   |
| 2026-03-17 | $5500000.00               | $8663119.07             |
| 2026-03-18 | $0.00                     | $2757272.40             |
| 2026-03-19 | $0.00                     | $226837651.24           |
| 2026-03-20 | $8881205.28               | $0.00                   |
| 2026-03-23 | $0.00                     | $176814620.50           |
| 2026-03-24 | $146878699.17             | $0.00                   |
| 2026-03-25 | $9010320.71               | $0.00                   |
| 2026-03-26 | $72811539.76              | $5500000.00             |
| 2026-03-27 | $37242710.42              | $0.00                   |
| 2026-03-30 | $0.00                     | $11154441.83            |
| 2026-03-31 | $0.00                     | $7922329.65             |

**Total Gross Subscriptions (Month):** $544932503.68

**Total Gross Redemptions (Month):** $902106767.92

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2026-03-02 | 3.5800%           |
| 2026-03-03 | 3.5800%           |
| 2026-03-04 | 3.5700%           |
| 2026-03-05 | 3.5700%           |
| 2026-03-06 | 3.5700%           |
| 2026-03-09 | 3.5700%           |
| 2026-03-10 | 3.5700%           |
| 2026-03-11 | 3.5700%           |
| 2026-03-12 | 3.5700%           |
| 2026-03-13 | 3.5700%           |
| 2026-03-16 | 3.5700%           |
| 2026-03-17 | 3.5700%           |
| 2026-03-18 | 3.5700%           |
| 2026-03-19 | 3.5700%           |
| 2026-03-20 | 3.5700%           |
| 2026-03-23 | 3.5700%           |
| 2026-03-24 | 3.5700%           |
| 2026-03-25 | 3.5700%           |
| 2026-03-26 | 3.5700%           |
| 2026-03-27 | 3.5800%           |
| 2026-03-30 | 3.5800%           |
| 2026-03-31 | 3.5800%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Retail investor           |  | 6.2300%          | 0.0000%              |
| Non-financial corporation |  | 8.8300%          | 0.0000%              |
| Non-financial corporation |  | 82.0600%         | 0.0000%              |

### Class: CC

- **Minimum Initial Investment:** $200000000.00

- **Net Assets of Class:** $34243969.00

- **Number of Shares Outstanding:** 34244058.5000

- **Expense Reimbursement/Waiver:** 10851.53

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2026-03-02 | 1.0000          |
|  |  |
| 2026-03-03 | 1.0000          |
|  |  |
| 2026-03-04 | 1.0000          |
|  |  |
| 2026-03-05 | 1.0000          |
|  |  |
| 2026-03-06 | 1.0000          |
|  |  |
| 2026-03-09 | 1.0000          |
|  |  |
| 2026-03-10 | 1.0000          |
|  |  |
| 2026-03-11 | 1.0000          |
|  |  |
| 2026-03-12 | 1.0000          |
|  |  |
| 2026-03-13 | 1.0000          |
|  |  |
| 2026-03-16 | 1.0000          |
|  |  |
| 2026-03-17 | 1.0000          |
|  |  |
| 2026-03-18 | 1.0000          |
|  |  |
| 2026-03-19 | 1.0000          |
|  |  |
| 2026-03-20 | 1.0000          |
|  |  |
| 2026-03-23 | 1.0000          |
|  |  |
| 2026-03-24 | 1.0000          |
|  |  |
| 2026-03-25 | 1.0000          |
|  |  |
| 2026-03-26 | 1.0000          |
|  |  |
| 2026-03-27 | 1.0000          |
|  |  |
| 2026-03-30 | 1.0000          |
|  |  |
| 2026-03-31 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2026-03-02 | $83296.51                 | $0.00                   |
| 2026-03-03 | $0.00                     | $0.00                   |
| 2026-03-04 | $0.00                     | $0.00                   |
| 2026-03-05 | $0.00                     | $0.00                   |
| 2026-03-06 | $0.00                     | $0.00                   |
| 2026-03-09 | $20000000.00              | $0.00                   |
| 2026-03-10 | $100000.00                | $0.00                   |
| 2026-03-11 | $0.00                     | $0.00                   |
| 2026-03-12 | $0.00                     | $0.00                   |
| 2026-03-13 | $0.00                     | $300000.00              |
| 2026-03-16 | $0.00                     | $0.00                   |
| 2026-03-17 | $0.00                     | $10000000.00            |
| 2026-03-18 | $0.00                     | $0.00                   |
| 2026-03-19 | $0.00                     | $900000.00              |
| 2026-03-20 | $0.00                     | $0.00                   |
| 2026-03-23 | $0.00                     | $0.00                   |
| 2026-03-24 | $0.00                     | $0.00                   |
| 2026-03-25 | $0.00                     | $0.00                   |
| 2026-03-26 | $0.00                     | $5000000.00             |
| 2026-03-27 | $0.00                     | $0.00                   |
| 2026-03-30 | $0.00                     | $0.00                   |
| 2026-03-31 | $0.00                     | $0.00                   |

**Total Gross Subscriptions (Month):** $20183296.51

**Total Gross Redemptions (Month):** $16200000.00

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2026-03-02 | 3.6000%           |
| 2026-03-03 | 3.6000%           |
| 2026-03-04 | 3.5900%           |
| 2026-03-05 | 3.5900%           |
| 2026-03-06 | 3.5900%           |
| 2026-03-09 | 3.5900%           |
| 2026-03-10 | 3.5900%           |
| 2026-03-11 | 3.5900%           |
| 2026-03-12 | 3.5900%           |
| 2026-03-13 | 3.5900%           |
| 2026-03-16 | 3.5900%           |
| 2026-03-17 | 3.5900%           |
| 2026-03-18 | 3.5900%           |
| 2026-03-19 | 3.5900%           |
| 2026-03-20 | 3.5900%           |
| 2026-03-23 | 3.5900%           |
| 2026-03-24 | 3.5900%           |
| 2026-03-25 | 3.5900%           |
| 2026-03-26 | 3.5900%           |
| 2026-03-27 | 3.6000%           |
| 2026-03-30 | 3.6000%           |
| 2026-03-31 | 3.6000%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Non-financial corporation |  | 5.9100%          | 0.0000%              |
| Non-financial corporation |  | 8.4200%          | 0.0000%              |
| Non-financial corporation |  | 18.2600%         | 0.0000%              |
| Non-financial corporation |  | 6.2300%          | 0.0000%              |
| Non-financial corporation |  | 60.3200%         | 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):** $1178429131.82
- **C.18.a - Value (excl. sponsor support):** $1178429131.82
- **C.19 - Percentage of Net Assets:** 100.0000%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2026-04-01
- **C.12 - Maturity Date (WAL):** 2026-04-01
- **C.13 - Final Legal Maturity Date:** 2026-04-01
- **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:** 2026-04-07

**By:** /s/Christopher Berarducci

**Name of Signing Officer:** Christopher Berarducci

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