# EDGAR Filing Document

**Accession Number:** 0001107414
**File Stem:** 0001193125-23-041835
**Filing Date:** 2023-2
**Character Count:** 2201
**Document Hash:** 3e904858a436758d7c54fec394711faa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-041835.hdr.sgml**: 20230217

**ACCESSION NUMBER**: 0001193125-23-041835

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230217

**DATE AS OF CHANGE**: 20230217

**EFFECTIVENESS DATE**: 20230217

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** STATE STREET INSTITUTIONAL INVESTMENT TRUST
- **CENTRAL INDEX KEY:** 0001107414
- **IRS NUMBER:** 046910804
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-30810
- **FILM NUMBER:** 23641653

**BUSINESS ADDRESS:**
- **STREET 1:** STATE STREET FINANCIAL CENTER
- **STREET 2:** ONE LINCOLN STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02111
- **BUSINESS PHONE:** 6176623239

**MAIL ADDRESS:**
- **STREET 1:** ONE LINCOLN STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02111

## Series and Classes Contracts Data

### State Street Diversified Income Fund (Series ID: S000074810)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class K    | SBFYX         | C000233021 |

---

## Series and Classes Contracts Data

### State Street Diversified Income Fund (Series ID: S000074810)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000233021 | Class K      | SBFYX           |

**STATE STREET INSTITUTIONAL INVESTMENT TRUST** 

**(the "Trust")** 

**STATE STREET DIVERSIFIED INCOME FUND** 

**(the "Fund")** 

**Class K (SBFYX)** 

*Supplement dated February 17, 2023 to the Prospectus and Statement of* 

*Additional Information, each dated January 31, 2023,* 

*as may be supplemented or revised from time to time* 

The Trust's Board of Trustees has approved a Plan of Liquidation and Termination of Series with respect to the Fund, pursuant to which the Fund is expected to be liquidated and terminated on or about February 24, 2023.

Accordingly, the Fund has discontinued the offering of its shares, and the Fund is no longer available for purchase.

***This Supplement should be retained with your***

***Prospectus and Statement of Additional Information for future reference.***

021723SUPP1