# EDGAR Filing Document

**Accession Number:** 0001107414
**File Stem:** 0001193125-26-203544
**Filing Date:** 2026-5
**Character Count:** 19127
**Document Hash:** c92f9d8807c8daf49e87c71e4cd79aa9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-203544.hdr.sgml**: 20260504

**ACCESSION NUMBER**: 0001193125-26-203544

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260504

**DATE AS OF CHANGE**: 20260504

**EFFECTIVENESS DATE**: 20260504

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** STATE STREET INSTITUTIONAL INVESTMENT TRUST
- **CENTRAL INDEX KEY:** 0001107414

**ORGANIZATION NAME:**
- **EIN:** 046910804
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-30810
- **FILM NUMBER:** 26936502

**BUSINESS ADDRESS:**
- **STREET 1:** ONE CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02114
- **BUSINESS PHONE:** 6176643920

**MAIL ADDRESS:**
- **STREET 1:** ONE CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02114

## Series and Classes Contracts Data

### State Street Equity 500 Index Fund (Series ID: S000010695)

| Class ID   | Class Name            | Ticker Symbol   |
|:---|:---|:---|
| C000029581 | Administrative Shares | STFAX           |
| C000029582 | Service Shares        | STBIX           |
| C000029583 | Class R Shares        | SSFRX           |
| C000136665 | Class A               | SSSVX           |
| C000136666 | Class K               | SSSYX           |
| C000136667 | Class I               | SSSWX           |

### State Street Aggregate Bond Index Fund (Series ID: S000010699)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000136668 | Class A      | SSFCX           |
| C000136669 | Class K      | SSFEX           |
| C000136670 | Class I      | SSFDX           |

### State Street Institutional U.S. Government Money Market Fund (Series ID: S000010701)

| Class ID   | Class Name                    | Ticker Symbol   |
|:---|:---|:---|
| C000052883 | Premier Class                 | GVMXX           |
| C000052884 | Investment Class              | GVVXX           |
| C000069459 | Select Class                  | GVSXX           |
| C000143775 | Institutional Class           | SAHXX           |
| C000143776 | Administration Class          | SALXX           |
| C000145476 | Investor Class                | SAMXX           |
| C000146109 | Class G                       | SSOXX           |
| C000230478 | Bancroft Capital Class        | VTGXX           |
| C000231443 | Blaylock Van Class            | BUYXX           |
| C000231444 | Cabrera Capital Markets Class | CAHXX           |
| C000231963 | Opportunity Class             | OPGXX           |
| C000261738 | Trust Class                   | GVBXX           |

### State Street Institutional Treasury Money Market Fund (Series ID: S000019117)

| Class ID   | Class Name                    | Ticker Symbol   |
|:---|:---|:---|
| C000052877 | Premier Class                 | TRIXX           |
| C000052878 | Investment Class              | TRVXX           |
| C000069461 | Select Class                  | TYSXX           |
| C000143780 | Administration Class          | SSKXX           |
| C000143781 | Institutional Class           | SSJXX           |
| C000143782 | Investor Class                | SSNXX           |
| C000230479 | Bancroft Capital Class        | VTTXX           |
| C000231445 | Cabrera Capital Markets Class | CSJXX           |
| C000231964 | Opportunity Class             | OPRXX           |

### State Street Institutional Treasury Plus Money Market Fund (Series ID: S000019118)

| Class ID   | Class Name                    | Ticker Symbol   |
|:---|:---|:---|
| C000052879 | Investment Class              | TPVXX           |
| C000052880 | Premier Class                 | TPIXX           |
| C000069462 | Select Class                  | TPSXX           |
| C000143783 | Institutional Class           | SAJXX           |
| C000143784 | Investor Class                | SAEXX           |
| C000143785 | Administration Class          | SSQXX           |
| C000172254 | Trust Class                   | TPLXX           |
| C000230480 | Bancroft Capital Class        | VTLXX           |
| C000231447 | Cabrera Capital Markets Class | CAJXX           |
| C000231448 | Blaylock Van Class            | BVYXX           |
| C000231965 | Opportunity Class             | OPTXX           |

### State Street Global All Cap Equity ex-U.S. Index Fund (Series ID: S000044030)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000136662 | Class A      | SSGHX           |
| C000136663 | Class K      | SSGLX           |
| C000136664 | Class I      | SSGJX           |

### State Street Target Retirement 2050 Fund (Series ID: S000046023)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143828 | Class I      | SSDJX           |
| C000143829 | Class K      | SSDLX           |
| C000232290 | Class R3     | SSAUX           |

### State Street Target Retirement 2055 Fund (Series ID: S000046024)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143832 | Class I      | SSDOX           |
| C000143833 | Class K      | SSDQX           |
| C000232291 | Class R3     | SSAWX           |

### State Street Target Retirement 2060 Fund (Series ID: S000046025)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143836 | Class I      | SSDWX           |
| C000143837 | Class K      | SSDYX           |
| C000232292 | Class R3     | SSAYX           |

### State Street Equity 500 Index II Portfolio (Series ID: S000046029)

| Class ID   | Class Name                                 | Ticker Symbol   |
|:---|:---|:---|
| C000143850 | State Street Equity 500 Index II Portfolio | SSEYX           |

### State Street Aggregate Bond Index Portfolio (Series ID: S000046031)

| Class ID   | Class Name                                  | Ticker Symbol   |
|:---|:---|:---|
| C000143852 | State Street Aggregate Bond Index Portfolio | SSAFX           |

### State Street Global All Cap Equity ex-U.S. Index Portfolio (Series ID: S000046032)

| Class ID   | Class Name                                                 | Ticker Symbol   |
|:---|:---|:---|
| C000143853 | State Street Global All Cap Equity ex-U.S. Index Portfolio | SSGVX           |

### State Street Target Retirement Fund (Series ID: S000046033)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143856 | Class I      | SSFNX           |
| C000143857 | Class K      | SSFOX           |
| C000232293 | Class R3     | SSFQX           |

### State Street Target Retirement 2025 Fund (Series ID: S000046036)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143868 | Class I      | SSBRX           |
| C000143869 | Class K      | SSBSX           |
| C000232295 | Class R3     | SSAHX           |

### State Street Target Retirement 2030 Fund (Series ID: S000046037)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143872 | Class I      | SSBWX           |
| C000143873 | Class K      | SSBYX           |
| C000232296 | Class R3     | SSAJX           |

### State Street Target Retirement 2035 Fund (Series ID: S000046038)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143876 | Class I      | SSCJX           |
| C000143877 | Class K      | SSCKX           |
| C000232297 | Class R3     | SSAZX           |

### State Street Target Retirement 2040 Fund (Series ID: S000046039)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143880 | Class I      | SSCNX           |
| C000143881 | Class K      | SSCQX           |
| C000232298 | Class R3     | SSAKX           |

### State Street Target Retirement 2045 Fund (Series ID: S000046040)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000143884 | Class I      | SSDDX           |
| C000143885 | Class K      | SSDEX           |
| C000232299 | Class R3     | SSAOX           |

### STATE STREET HEDGED INTERNATIONAL DEVELOPED EQUITY INDEX FUND (Series ID: S000049192)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000155088 | Class K      | SSHQX           |

### STATE STREET INTERNATIONAL DEVELOPED EQUITY INDEX FUND (Series ID: S000049193)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000155092 | Class K      | SSIWX           |

### STATE STREET SMALL/MID CAP EQUITY INDEX FUND (Series ID: S000050331)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000158901 | Class A      | SSMJX           |
| C000158902 | Class I      | SSMLX           |
| C000158903 | Class K      | SSMKX           |

### STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO (Series ID: S000050332)

| Class ID   | Class Name                                        | Ticker Symbol   |
|:---|:---|:---|
| C000158904 | STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO | SSMHX           |

### STATE STREET EMERGING MARKETS EQUITY INDEX FUND (Series ID: S000050542)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000159454 | CLASS K      | SSKEX           |

### State Street Treasury Obligations Money Market Fund (Series ID: S000058519)

| Class ID   | Class Name                                          | Ticker Symbol   |
|:---|:---|:---|
| C000192374 | State Street Treasury Obligations Money Market Fund | TAQXX           |

### State Street Target Retirement 2065 Fund (Series ID: S000067360)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000216582 | Class I      | SSFJX           |
| C000216583 | Class K      | SSFKX           |
| C000232300 | Class R3     | SSFPX           |

### State Street Balanced Index Fund (Series ID: S000082802)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000246124 | Class K      | SSBIX           |

### State Street Federal Treasury Money Market Fund (Series ID: S000086381)

| Class ID   | Class Name      | Ticker Symbol   |
|:---|:---|:---|
| C000251884 | Advantage Class | AFTXX           |

### State Street Federal Treasury Plus Money Market Fund (Series ID: S000086382)

| Class ID   | Class Name      | Ticker Symbol   |
|:---|:---|:---|
| C000251885 | Advantage Class | ATPXX           |

### State Street Federal Government Money Market Fund (Series ID: S000086383)

| Class ID   | Class Name      | Ticker Symbol   |
|:---|:---|:---|
| C000251886 | Advantage Class | AGFXX           |

### State Street Target Retirement 2070 Fund (Series ID: S000087785)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000253749 | Class R3     | SSGUX           |
| C000253750 | Class I      | SSGQX           |
| C000253751 | Class K      | SSGNX           |

State Street Institutional Investment Trust

One Congress Street

Boston, MA 02114

May 4, 2026

**<u>VIA EDGAR</u>**

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Attention: Office of Filings, Information & Consumer Service

Re: State Street Institutional Investment Trust (the "Trust")

File Nos.: 811-09819 and 333-30810

Dear Sir or Madam:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended (the "1933 Act"), we are transmitting for filing via EDGAR on behalf of the Trust this letter as certification that the Prospectuses and Statements of Additional Information listed in <u>Exhibit A</u> hereto for the above-referenced Trust, dated April 30, 2026, do not differ from those contained in the Post-Effective Amendment No. 328 under the 1933 Act to the Trust's Registration Statement on Form N-1A that was filed electronically via EDGAR on April 24, 2026 with a designated effective date of April 30, 2026 (Accession # 0001193125-26-177471).

If you have any questions, please contact me at (617) 664-6507.

Very truly yours,

---

| |
|:---|
| /s/ Edmund Gerard Maiorana, Jr. |
| Edmund Gerard Maiorana, Jr. |
| Assistant Secretary |

---

------

**<u>EXHIBIT A</u>**

**<u>Prospectus</u>**

State Street Aggregate Bond Index Fund

State Street Equity 500 Index Fund

State Street Global All Cap Equity ex-U.S. Index Fund

State Street Small/Mid Cap Equity Index Fund

*Class A, Class I, and Class K* 

**<u>Prospectus</u>**

State Street Emerging Markets Equity Index Fund

State Street Balanced Index Fund

*Class K* 

**<u>Prospectus</u>**

State Street Equity 500 Index Fund

*Administrative Shares* 

**<u>Prospectus</u>**

State Street Equity 500 Index Fund

*Class R* 

**<u>Prospectus</u>**

State Street Equity 500 Index Fund

*Service Shares* 

**<u>Prospectus</u>**

State Street Institutional Treasury Money Market Fund

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Institutional Class, Administration Class, Investment Class, Investor Class, Premier Class, and Opportunity Class* 

**<u>Prospectus</u>**

State Street Aggregate Bond Index Portfolio

State Street Equity 500 Index II Portfolio

State Street Global All Cap Equity ex-U.S. Index Portfolio

State Street Small/Mid Cap Equity Index Portfolio

**<u>Prospectus</u>**

State Street Target Retirement 2025 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2030 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2035 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2040 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2045 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2050 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2055 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2060 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2065 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement 2070 Fund

*Class I, Class K, and Class R3*

State Street Target Retirement Fund

*Class I, Class K, and Class R3*

**<u>Prospectus</u>**

State Street Institutional U.S. Government Money Market Fund

*Class G* 

**<u>Prospectus</u>**

State Street Hedged International Developed Equity Index Fund

State Street International Developed Equity Index Fund

*Class K* 

------

**<u>Prospectus</u>**

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Trust Class* 

**<u>Prospectus</u>**

State Street Institutional U.S. Government Money Market Fund

*Administration Class* 

**<u>Prospectus</u>**

**Neuberger Money Fund** 

State Street Institutional U.S. Government Money Market Fund

State Street Institutional Treasury Plus Money Market Fund

*Institutional Class* 

**<u>Prospectus</u>**

State Street Treasury Obligations Money Market Fund

**<u>Prospectus</u>**

State Street Institutional Treasury Money Market Fund

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Select Class* 

**<u>Prospectus</u>**

State Street Institutional Treasury Money Market Fund

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Bancroft Capital Class* 

**<u>Prospectus</u>**

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Blaylock Van Class* 

**<u>Prospectus</u>**

State Street Institutional Treasury Money Market Fund

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Cabrera Capital Markets Class* 

**<u>Prospectus</u>**

State Street Federal Treasury Money Market Fund

State Street Federal Treasury Plus Money Market Fund

State Street Federal Government Money Market Fund

*Advantage Class* 

------

**<u>Statement of Additional Information</u>**

State Street Institutional Treasury Money Market Fund

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Bancroft Capital Class* 

**<u>Statement of Additional Information</u>**

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Blaylock Van Class* 

**<u>Statement of Additional Information</u>**

State Street Institutional Treasury Money Market Fund

State Street Institutional Treasury Plus Money Market Fund

State Street Institutional U.S. Government Money Market Fund

*Cabrera Capital Markets Class* 

**<u>Statement of Additional Information</u>**

State Street Aggregate Bond Index Fund

*Class A, Class I, and Class K* 

State Street Balanced Index Fund

*Class K* 

State Street Emerging Markets Equity Index Fund

*Class K* 

State Street Equity 500 Index Fund

*Administrative Shares, Class R, Service Shares, Class A, Class I, and Class K* 

State Street Global All Cap Equity Ex-U.S. Index Fund

*Class A, Class I, and Class K* 

State Street Hedged International Developed Equity Index Fund

*Class K* 

State Street International Developed Equity Index Fund

*Class K* 

State Street Small/Mid Cap Equity Index Fund

*Class A, Class I, and Class K* 

State Street Target Retirement 2025 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement 2030 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement 2035 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement 2040 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement 2045 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement 2050 Fund

*Class I, Class K, and Class R3* 

------

State Street Target Retirement 2055 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement 2060 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement 2065 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement 2070 Fund

*Class I, Class K, and Class R3* 

State Street Target Retirement Fund

*Class I, Class K, and Class R3* 

**<u>Statement of Additional Information</u>**

State Street Institutional Treasury Money Market Fund

*Premier Class, Investment Class, Select Class, Institutional Class, Investor Class, Administration Class, and Opportunity Class* 

State Street Institutional Treasury Plus Money Market Fund

*Premier Class, Investment Class, Select Class, Institutional Class, Investor Class, Administration Class, Trust Class, and Opportunity Class* 

State Street Institutional U.S. Government Money Market Fund

*Premier Class, Investment Class, Select Class, Institutional Class, Investor Class, Administration Class, Class G, Trust Class and Opportunity Class* 

State Street Treasury Obligations Money Market Fund

**<u>Statement of Additional Information</u>**

State Street Aggregate Bond Index Portfolio

State Street Equity 500 Index II Portfolio

State Street Global All Cap Equity Ex-U.S. Index Portfolio

State Street Small/Mid Cap Equity Index Portfolio

**<u>Statement of Additional Information</u>**

State Street Federal Treasury Money Market Fund

State Street Federal Treasury Plus Money Market Fund

State Street Federal Government Money Market Fund

*Advantage Class*