# EDGAR Filing Document

**Accession Number:** 0000804239
**File Stem:** 0001104659-26-073415
**Filing Date:** 2026-6
**Character Count:** 2551
**Document Hash:** c1176c58e542ae8e4efbacebfef0b52c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-073415.hdr.sgml**: 20260612

**ACCESSION NUMBER**: 0001104659-26-073415

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20260612

**DATE AS OF CHANGE**: 20260612

**EFFECTIVENESS DATE**: 20260612

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SEI INSTITUTIONAL MANAGED TRUST
- **CENTRAL INDEX KEY:** 0000804239

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-09504
- **FILM NUMBER:** 261086446

**BUSINESS ADDRESS:**
- **STREET 1:** 2 OLIVER ST
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109
- **BUSINESS PHONE:** 8003455734

**MAIL ADDRESS:**
- **STREET 1:** SEI INVESTMENTS
- **STREET 2:** 1 FREEDOM VALLEY DRIVE
- **CITY:** OAKS
- **STATE:** PA
- **ZIP:** 19456

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** TRUSTFUNDS INSTITUTIONAL MANAGED TRUST
- **DATE OF NAME CHANGE:** 19890509

## Series and Classes Contracts Data

### SIMT Dynamic Asset Allocation Fund (Series ID: S000050286)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class F    | SDYAX         | C000158774 |
| Class Y    | SDYYX         | C000158775 |

---

## Series and Classes Contracts Data

### SIMT Dynamic Asset Allocation Fund (Series ID: S000050286)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000158774 | Class F      | SDYAX           |
| C000158775 | Class Y      | SDYYX           |

SEI INSTITUTIONAL MANAGED TRUST

Dynamic Asset Allocation Fund<br>(the "Fund")

Supplement Dated June 12, 2026<br>to the Class F Shares and Class Y Shares Prospectuses (the "Prospectuses") and to the<br>Statement of Additional Information (the "SAI") each dated January 31, 2026, as amended on<br>April 24, 2026

This Supplement provides new and additional information beyond that contained in the Prospectus and SAI, and should be read in conjunction with such Prospectus and SAI.

*The Prospectus and SAI are hereby amended and supplemented to reflect the following changes to the Fund.*

<u>Change in Portfolio Management of the Fund</u>

*James Smigiel and James Solloway no longer serve as portfolio managers to the Fund. As such, all references to James Smigiel and James Solloway are hereby deleted from the Prospectus and SAI.*

*There are no other changes to the Prospectus and SAI.*

PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

SEI-F-1646 (06/26)

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