# EDGAR Filing Document

**Accession Number:** 0000889512
**File Stem:** 0001193125-26-007549
**Filing Date:** 2026-1
**Character Count:** 18284
**Document Hash:** acab1545f8eaa9b2c9abac7a8cb961dc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-007549.hdr.sgml**: 20260108

**ACCESSION NUMBER**: 0001193125-26-007549

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260108

**DATE AS OF CHANGE**: 20260108

**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:** 26519229

**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):** 2025-12-31

**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:** $7962387031.93

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

- **Cash:** $0.00

- **Total Other Assets:** $88621.61

- **Total Liabilities:** $26400456.02

- **Net Assets of Series:** $7936075197.52

- **Number of Shares Outstanding (Series):** 7936488019.1300

- **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 (%)   |
|:---|:---|:---|:---|:---|
| 2025-12-01 | $18122473278.48           | $18122473278.48            | 99.8600%                  | 99.8600%                   |
| 2025-12-02 | $17097332084.83           | $17246028334.33            | 98.9800%                  | 99.8500%                   |
| 2025-12-03 | $17394219666.02           | $17394219666.02            | 99.8400%                  | 99.8400%                   |
| 2025-12-04 | $17171096225.92           | $17171096225.92            | 99.8400%                  | 99.8400%                   |
| 2025-12-05 | $17814819169.46           | $17814819169.46            | 99.8400%                  | 99.8400%                   |
| 2025-12-08 | $17819370878.43           | $17819370878.43            | 99.8300%                  | 99.8300%                   |
| 2025-12-09 | $18081718587.04           | $18081718587.04            | 99.8300%                  | 99.8300%                   |
| 2025-12-10 | $18159785088.82           | $18159785088.82            | 99.8300%                  | 99.8300%                   |
| 2025-12-11 | $19302349772.23           | $19302349772.23            | 99.8200%                  | 99.8200%                   |
| 2025-12-12 | $19182771724.37           | $19182771724.37            | 99.8100%                  | 99.8100%                   |
| 2025-12-15 | $19521833389.43           | $19521833389.43            | 99.8100%                  | 99.8100%                   |
| 2025-12-16 | $19062661985.27           | $19062661985.27            | 99.8000%                  | 99.8000%                   |
| 2025-12-17 | $19666305441.54           | $19666305441.54            | 99.8000%                  | 99.8000%                   |
| 2025-12-18 | $19656959076.72           | $19656959076.72            | 99.8000%                  | 99.8000%                   |
| 2025-12-19 | $18689096058.93           | $18689096058.93            | 99.7800%                  | 99.7800%                   |
| 2025-12-22 | $19022927229.86           | $19022927229.86            | 99.7800%                  | 99.7800%                   |
| 2025-12-23 | $18292456643.31           | $18292456643.31            | 99.7700%                  | 99.7700%                   |
| 2025-12-24 | $19352298301.15           | $19352298301.15            | 99.7800%                  | 99.7800%                   |
| 2025-12-26 | $19071794756.44           | $19071794756.44            | 99.7500%                  | 99.7500%                   |
| 2025-12-29 | $19507776800.04           | $19507776800.04            | 99.7500%                  | 99.7500%                   |
| 2025-12-30 | $19003505531.88           | $19003505531.88            | 99.7400%                  | 99.7400%                   |
| 2025-12-31 | $19064771063.64           | $19064771063.64            | 99.7900%                  | 99.7900%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2025-12-01 | 3.9600%             |
| 2025-12-02 | 3.9500%             |
| 2025-12-03 | 3.9500%             |
| 2025-12-04 | 3.9500%             |
| 2025-12-05 | 3.9300%             |
| 2025-12-08 | 3.9300%             |
| 2025-12-09 | 3.9200%             |
| 2025-12-10 | 3.9200%             |
| 2025-12-11 | 3.9100%             |
| 2025-12-12 | 3.8900%             |
| 2025-12-15 | 3.8900%             |
| 2025-12-16 | 3.8800%             |
| 2025-12-17 | 3.8700%             |
| 2025-12-18 | 3.8700%             |
| 2025-12-19 | 3.8500%             |
| 2025-12-22 | 3.8400%             |
| 2025-12-23 | 3.8400%             |
| 2025-12-24 | 3.8300%             |
| 2025-12-26 | 3.8200%             |
| 2025-12-29 | 3.8200%             |
| 2025-12-30 | 3.8100%             |
| 2025-12-31 | 3.8100%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2025-12-01 | 0.9999                      |
|  |  |
| 2025-12-02 | 0.9999                      |
|  |  |
| 2025-12-03 | 0.9999                      |
|  |  |
| 2025-12-04 | 0.9999                      |
|  |  |
| 2025-12-05 | 0.9999                      |
|  |  |
| 2025-12-08 | 0.9999                      |
|  |  |
| 2025-12-09 | 0.9999                      |
|  |  |
| 2025-12-10 | 0.9999                      |
|  |  |
| 2025-12-11 | 0.9999                      |
|  |  |
| 2025-12-12 | 0.9999                      |
|  |  |
| 2025-12-15 | 0.9999                      |
|  |  |
| 2025-12-16 | 0.9999                      |
|  |  |
| 2025-12-17 | 0.9999                      |
|  |  |
| 2025-12-18 | 1.0000                      |
|  |  |
| 2025-12-19 | 0.9999                      |
|  |  |
| 2025-12-22 | 0.9999                      |
|  |  |
| 2025-12-23 | 0.9999                      |
|  |  |
| 2025-12-24 | 0.9999                      |
|  |  |
| 2025-12-26 | 0.9999                      |
|  |  |
| 2025-12-29 | 0.9999                      |
|  |  |
| 2025-12-30 | 0.9999                      |
|  |  |
| 2025-12-31 | 0.9999                      |
|  |  |

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

### Class: 0L

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $4962311002.73

- **Number of Shares Outstanding:** 4962568211.2900

- **Expense Reimbursement/Waiver:** 622235.56

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-12-01 | 0.9999          |
|  |  |
| 2025-12-02 | 0.9999          |
|  |  |
| 2025-12-03 | 0.9999          |
|  |  |
| 2025-12-04 | 0.9999          |
|  |  |
| 2025-12-05 | 0.9999          |
|  |  |
| 2025-12-08 | 0.9999          |
|  |  |
| 2025-12-09 | 0.9999          |
|  |  |
| 2025-12-10 | 0.9999          |
|  |  |
| 2025-12-11 | 0.9999          |
|  |  |
| 2025-12-12 | 0.9999          |
|  |  |
| 2025-12-15 | 0.9999          |
|  |  |
| 2025-12-16 | 0.9999          |
|  |  |
| 2025-12-17 | 1.0000          |
|  |  |
| 2025-12-18 | 1.0000          |
|  |  |
| 2025-12-19 | 0.9999          |
|  |  |
| 2025-12-22 | 0.9999          |
|  |  |
| 2025-12-23 | 0.9999          |
|  |  |
| 2025-12-24 | 0.9999          |
|  |  |
| 2025-12-26 | 0.9999          |
|  |  |
| 2025-12-29 | 0.9999          |
|  |  |
| 2025-12-30 | 0.9999          |
|  |  |
| 2025-12-31 | 0.9999          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-12-01 | $144825345.99             | $63951722.67            |
| 2025-12-02 | $267157211.27             | $126473481.81           |
| 2025-12-03 | $9414467.15               | $30380390.51            |
| 2025-12-04 | $252879670.22             | $55960135.19            |
| 2025-12-05 | $35427420.80              | $46415238.45            |
| 2025-12-08 | $12947104.15              | $168604826.42           |
| 2025-12-09 | $17086983.85              | $13528591.67            |
| 2025-12-10 | $78586582.58              | $14732509.11            |
| 2025-12-11 | $480464628.08             | $38247082.35            |
| 2025-12-12 | $20958001.07              | $46815157.98            |
| 2025-12-15 | $147910660.18             | $41129236.66            |
| 2025-12-16 | $43272561.14              | $121357735.68           |
| 2025-12-17 | $1022580532.94            | $64136344.17            |
| 2025-12-18 | $50494071.17              | $54737751.92            |
| 2025-12-19 | $27445266.31              | $1099920941.04          |
| 2025-12-22 | $53558727.71              | $13350400.69            |
| 2025-12-23 | $6478337.03               | $151320181.70           |
| 2025-12-24 | $208122041.53             | $22761409.54            |
| 2025-12-26 | $42811945.74              | $100060693.67           |
| 2025-12-29 | $29203413.57              | $109828796.17           |
| 2025-12-30 | $45127719.62              | $210407562.44           |
| 2025-12-31 | $9422709.08               | $50708098.79            |

**Total Gross Subscriptions (Month):** $3006175401.18

**Total Gross Redemptions (Month):** $2644828288.63

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-12-01 | 3.7800%           |
| 2025-12-02 | 3.7700%           |
| 2025-12-03 | 3.7700%           |
| 2025-12-04 | 3.7700%           |
| 2025-12-05 | 3.7500%           |
| 2025-12-08 | 3.7500%           |
| 2025-12-09 | 3.7400%           |
| 2025-12-10 | 3.7400%           |
| 2025-12-11 | 3.7300%           |
| 2025-12-12 | 3.7100%           |
| 2025-12-15 | 3.7100%           |
| 2025-12-16 | 3.7000%           |
| 2025-12-17 | 3.6900%           |
| 2025-12-18 | 3.6900%           |
| 2025-12-19 | 3.6700%           |
| 2025-12-22 | 3.6600%           |
| 2025-12-23 | 3.6600%           |
| 2025-12-24 | 3.6500%           |
| 2025-12-26 | 3.6400%           |
| 2025-12-29 | 3.6400%           |
| 2025-12-30 | 3.6300%           |
| 2025-12-31 | 3.6300%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Broker-dealer             |  | 28.0600%         | 0.0000%              |
| Broker-dealer             |  | 29.5700%         | 0.0000%              |
| Non-financial corporation |  | 20.3900%         | 0.0000%              |

### Class: 0I

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $2973764194.79

- **Number of Shares Outstanding:** 2973919807.8400

- **Expense Reimbursement/Waiver:** 437003.01

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-12-01 | 0.9999          |
|  |  |
| 2025-12-02 | 0.9999          |
|  |  |
| 2025-12-03 | 0.9999          |
|  |  |
| 2025-12-04 | 0.9999          |
|  |  |
| 2025-12-05 | 0.9999          |
|  |  |
| 2025-12-08 | 0.9999          |
|  |  |
| 2025-12-09 | 0.9999          |
|  |  |
| 2025-12-10 | 0.9999          |
|  |  |
| 2025-12-11 | 0.9999          |
|  |  |
| 2025-12-12 | 0.9999          |
|  |  |
| 2025-12-15 | 0.9999          |
|  |  |
| 2025-12-16 | 0.9999          |
|  |  |
| 2025-12-17 | 0.9999          |
|  |  |
| 2025-12-18 | 0.9999          |
|  |  |
| 2025-12-19 | 0.9999          |
|  |  |
| 2025-12-22 | 0.9999          |
|  |  |
| 2025-12-23 | 0.9999          |
|  |  |
| 2025-12-24 | 0.9999          |
|  |  |
| 2025-12-26 | 0.9999          |
|  |  |
| 2025-12-29 | 0.9999          |
|  |  |
| 2025-12-30 | 0.9999          |
|  |  |
| 2025-12-31 | 0.9999          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-12-01 | $28472210.01              | $495760.57              |
| 2025-12-02 | $0.00                     | $638742116.91           |
| 2025-12-03 | $2234248.49               | $585.02                 |
| 2025-12-04 | $10408483.60              | $0.00                   |
| 2025-12-05 | $190981732.99             | $0.00                   |
| 2025-12-08 | $128119008.51             | $16969.57               |
| 2025-12-09 | $294535252.21             | $0.00                   |
| 2025-12-10 | $2296299.66               | $0.00                   |
| 2025-12-11 | $0.00                     | $132044819.31           |
| 2025-12-12 | $104353202.96             | $0.00                   |
| 2025-12-15 | $0.00                     | $17536238.95            |
| 2025-12-16 | $188208121.93             | $0.00                   |
| 2025-12-17 | $60237587.99              | $6438.64                |
| 2025-12-18 | $51449995.10              | $0.00                   |
| 2025-12-19 | $0.00                     | $29244494.50            |
| 2025-12-22 | $0.00                     | $29910625.58            |
| 2025-12-23 | $27018493.35              | $8000.00                |
| 2025-12-24 | $50382644.24              | $0.00                   |
| 2025-12-26 | $301467.28                | $0.00                   |
| 2025-12-29 | $38274367.49              | $0.00                   |
| 2025-12-30 | $33989189.01              | $0.00                   |
| 2025-12-31 | $0.00                     | $48141751.15            |

**Total Gross Subscriptions (Month):** $1211262304.82

**Total Gross Redemptions (Month):** $896147800.20

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-12-01 | 3.7300%           |
| 2025-12-02 | 3.7200%           |
| 2025-12-03 | 3.7200%           |
| 2025-12-04 | 3.7100%           |
| 2025-12-05 | 3.7000%           |
| 2025-12-08 | 3.7000%           |
| 2025-12-09 | 3.6900%           |
| 2025-12-10 | 3.6900%           |
| 2025-12-11 | 3.6800%           |
| 2025-12-12 | 3.6600%           |
| 2025-12-15 | 3.6600%           |
| 2025-12-16 | 3.6500%           |
| 2025-12-17 | 3.6400%           |
| 2025-12-18 | 3.6400%           |
| 2025-12-19 | 3.6200%           |
| 2025-12-22 | 3.6100%           |
| 2025-12-23 | 3.6100%           |
| 2025-12-24 | 3.6000%           |
| 2025-12-26 | 3.5900%           |
| 2025-12-29 | 3.5900%           |
| 2025-12-30 | 3.5800%           |
| 2025-12-31 | 3.5800%           |

**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):** $7962387031.93
- **C.18.a - Value (excl. sponsor support):** $7962387031.93
- **C.19 - Percentage of Net Assets:** 100.0000%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2026-01-02
- **C.12 - Maturity Date (WAL):** 2026-01-02
- **C.13 - Final Legal Maturity Date:** 2026-01-02
- **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:** 2026-01-08

**By:** /s/Christopher Berarducci

**Name of Signing Officer:** Christopher Berarducci

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