# EDGAR Filing Document

**Accession Number:** 0000939934
**File Stem:** 0001104659-23-036689
**Filing Date:** 2023-3
**Character Count:** 3503
**Document Hash:** 8945dcb6eaf6122f74e30665f8802cbd
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-23-036689.hdr.sgml**: 20230324

**ACCESSION NUMBER**: 0001104659-23-036689

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20230324

**DATE AS OF CHANGE**: 20230324

**EFFECTIVENESS DATE**: 20230324

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SEI INSTITUTIONAL INVESTMENTS TRUST
- **CENTRAL INDEX KEY:** 0000939934
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0531

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-58041
- **FILM NUMBER:** 23760720

**BUSINESS ADDRESS:**
- **STREET 1:** 1 FREEDOM VALLEY DRIVE
- **CITY:** OAK
- **STATE:** PA
- **ZIP:** 19456
- **BUSINESS PHONE:** 610 676-3097

**MAIL ADDRESS:**
- **STREET 1:** 1 FREEDOM VALLEY DRIVE
- **CITY:** OAK
- **STATE:** PA
- **ZIP:** 19456

## Series and Classes Contracts Data

### SIIT Dynamic Asset Allocation Fund (Series ID: S000027147)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                   | Ticker Symbol | Class ID   |
| SIIT Dynamic Asset Allocation Fund - Class A | SDLAX         | C000081914 |

---

## Series and Classes Contracts Data

### SIIT Dynamic Asset Allocation Fund (Series ID: S000027147)

| Class ID   | Class Name                                   | Ticker Symbol   |
|:---|:---|:---|
| C000081914 | SIIT Dynamic Asset Allocation Fund - Class A | SDLAX           |

SEI INSTITUTIONAL INVESTMENTS TRUST

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

Supplement Dated March 24, 2023<br>to the Prospectus dated September 30, 2022, as amended on December 16, 2022, and <br>February 3, 2023

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

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

<u>Change in the "More Information About Investments" Disclosure</u>

*In the section titled "More Information About Investments," the first sentence of the last paragraph thereunder is hereby deleted and replaced with the following:*

To the extent a Subsidiary engages in derivative transactions, it will comply with the provisions of Rule 18f-4 under the 1940 Act that would apply to either the Dynamic Asset Allocation Fund or Multi-Asset Real Return Fund, as applicable, engaging directly in such transactions.

<u>Change in Portfolio Management of the Fund's Subsidiary</u>

*SSGA Funds Management, Inc. no longer serves as a sub-adviser to the DAA Commodity Strategy Subsidiary Ltd., a subsidiary of the Fund, but continues to manage a portion of the assets of the Fund. Accordingly, the Prospectus is updated as follows:*

*In the section titled "Sub-Advisers and Portfolio Managers," under the heading titled "Dynamic Asset Allocation Fund," the first two sentences are hereby deleted and replaced with the following:*

SSGA Funds Management, Inc.: SSGA Funds Management, Inc. (SSGA FM), located at One Iron Street, Boston, Massachusetts 02210, serves as a Sub-Adviser for a portion of the assets of the Dynamic Asset Allocation Fund. The professionals primarily responsible for the day-to-day management of the portion of the assets of the Dynamic Asset Allocation Fund allocated to SSGA FM are Charles McGinn and Tyhesha Harrington.

*There are no other changes to the Prospectus.*

PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

SEI-F-1438 (03/23)

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