# EDGAR Filing Document

**Accession Number:** 0000889512
**File Stem:** 0001193125-25-155334
**Filing Date:** 2025-7
**Character Count:** 3475
**Document Hash:** 774ad7b597b42f504873011a581f21fa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-155334.hdr.sgml**: 20250703

**ACCESSION NUMBER**: 0001193125-25-155334

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250703

**DATE AS OF CHANGE**: 20250703

**EFFECTIVENESS DATE**: 20250703

**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:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-49552
- **FILM NUMBER:** 251104194

**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 SMASh Series M Fund (Series ID: S000014681)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000040179 | SMASh Series M Fund | LMSMX           |

### Western Asset SMASh Series C Fund (Series ID: S000014682)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000040180 | SMASh Series C Fund | LMLCX           |

### Western Asset SMASh Series TF Fund (Series ID: S000052179)

| Class ID   | Class Name                         | Ticker Symbol   |
|:---|:---|:---|
| C000164185 | Western Asset SMASh Series TF Fund | LSMSX           |

### WESTERN ASSET SMASh SERIES CORE COMPLETION FUND (Series ID: S000069099)

| Class ID   | Class Name                        | Ticker Symbol   |
|:---|:---|:---|
| C000220869 | SMASh SERIES CORE COMPLETION FUND | WAADX           |

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| | |
|:---|:---|
| ![LOGO](g918067g0618061529267.jpg)  | ROPES & GRAY LLP<br> PRUDENTIAL TOWER<br> 800 BOYLSTON STREET<br> BOSTON, MA 02199-3600<br> WWW.ROPESGRAY.COM |

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| | |
|:---|:---|
|  | Adam M. Schlichtmann |
| July 3, 2025 | T +1 617 951 7114 |
|  | F +1 617 235 7346 |
| <u>VIA EDGAR</u> | adam.schlichtmann@ropesgray.com |

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Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

Re: Legg Mason Partners Institutional Trust (the "Registrant")

(Registration Nos. 033-49552 and 811-06740)

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned has been authorized by the Registrant to submit this filing in lieu of a filing under Rule 497(c) under the Securities Act, and to certify (a) that the forms of prospectus and statement of additional information used with respect to Western Asset SMASh Series C Fund, Western Asset SMASh Series Core Completion Fund, Western Asset SMASh Series M Fund and Western Asset SMASh Series TF Fund, each a series of the Registrant, do not differ from those contained in Post-Effective Amendment No. 153 to the Registrant's Registration Statement ("Amendment No. 153"), and (b) that Amendment No. 153 was filed electronically.

Any questions or comments regarding this matter should be directed to the undersigned at (617) 951-7114.

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| |
|:---|
| Very truly yours, |
| /s/ Adam M. Schlichtmann |
| Adam M. Schlichtmann |

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