# EDGAR Filing Document

**Accession Number:** 0001107414
**File Stem:** 0001752724-25-211114
**Filing Date:** 2025-8
**Character Count:** 8055
**Document Hash:** d000c7a8a5e906c12f00599a1e3e4022
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-211114.hdr.sgml**: 20250828

**ACCESSION NUMBER**: 0001752724-25-211114

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250630

**FILED AS OF DATE**: 20250828

**DATE AS OF CHANGE**: 20250828

**PERIOD START**: 20251231

**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:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-09819
- **FILM NUMBER:** 251270105

**BUSINESS ADDRESS:**
- **STREET 1:** ONE IRON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210
- **BUSINESS PHONE:** 6176643920

**MAIL ADDRESS:**
- **STREET 1:** ONE IRON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210

## Series and Classes Contracts Data

### 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           |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** STATE STREET INSTITUTIONAL INVESTMENT TRUST

- **b. Investment Company Act file number:** 811-09819

- **c. CIK number of Registrant:** 0001107414

- **d. LEI of Registrant:** 549300P1E098W6ES7M39

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** One Iron Street

  - **City:** Boston

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02210

  - **Telephone number:** 617-664-7037

**Item A.2. Information about the Series.**

- **a. Name of Series:** State Street Target Retirement 2035 Fund

- **b. EDGAR series identifier (if any):** S000046038

- **c. LEI of Series:** 549300YYYQVBSQQ8DW95

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2025-12-31

- **b. Date as of which information is reported:** 2025-06-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $3356469359.61

**Total Liabilities:** $51560863.78

**Net Assets:** $3304908495.83

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000232297 | 0.58%                | 3.65%                | 3.66%                |
| Class ID C000143877 | 0.65%                | 3.64%                | 3.79%                |
| Class ID C000143876 | 0.73%                | 3.61%                | 3.76%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $116968.44               | $16396449.15                               |
| Month 2  | $4549395.42              | $104021350.26                              |
| Month 3  | $1360744.86              | $114015934.88                              |

### Schedule of Portfolio Investments

| Name                                                       | Title                                                      | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)    | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| SPDR Bloomberg 1-10 Year TIPS ETF                          | SPDR Bloomberg 1-10 Year TIPS ETF                          | CUSIP: 78468R861<br>LEI: 549300SS31WHLX0B1I97 | Long             | EC               | RF                | US        |   1711997 | NS      | $32767622.58   | 0.99%             |  |  |  | No            |                  1 | On Loan: —       |
| SPDR Portfolio Long Term Treasury ETF                      | SPDR Portfolio Long Term Treasury ETF                      | CUSIP: 78464A664<br>LEI: 549300GYQKAMF6JUVI06 | Long             | EC               | RF                | US        |  11561029 | NS      | $307292150.82  | 9.30%             |  |  |  | No            |                  1 | On Loan: No      |
| SPDR Bloomberg High Yield Bond ETF                         | SPDR Bloomberg High Yield Bond ETF                         | CUSIP: 78468R622<br>LEI: 549300NCLW2248PN7J24 | Long             | EC               | RF                | US        |   1652300 | NS      | $160719221.00  | 4.86%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street Small/Mid Cap Equity Index Portfolio          | State Street Small/Mid Cap Equity Index Portfolio          | CUSIP: 85749T707<br>LEI: 54930001FXUIVS800B48 | Long             | EC               | RF                | US        |    653690 | NS      | $211828152.15  | 6.41%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street Global Advisors                               | State Street Navigator Securities Lending Portfolio II     | CUSIP: 857492706<br>LEI: 5493008BJIBKQ5KTIF74 | Long             | STIV             | RF                | US        |    103350 | NS      | $103350.00     | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street Equity 500 Index II Portfolio                 | State Street Equity 500 Index II Portfolio                 | CUSIP: 85749T756<br>LEI: 549300IDK82VZN2AFK60 | Long             | EC               | RF                | US        |   2008889 | NS      | $1133294855.96 | 34.29%            |  |  |  | No            |                  1 | On Loan: No      |
| State Street Global Advisors                               | State Street Institutional US Government Money Market Fund | CUSIP: 857492706<br>LEI: 549300BZ5TGIFZUZDZ37 | Long             | STIV             | RF                | US        |   1645792 | NS      | $1645792.22    | 0.05%             |  |  |  | No            |                  1 | On Loan: No      |
| SPDR Dow Jones Global Real Estate ETF                      | SPDR Dow Jones Global Real Estate ETF                      | CUSIP: 78463X749<br>LEI: 549300NEMKJTY73KOC44 | Long             | EC               | RF                | US        |    187815 | NS      | $8290154.10    | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street Aggregate Bond Index Portfolio                | State Street Aggregate Bond Index Portfolio                | CUSIP: 85749T772<br>LEI: 549300CYRPLDVB2ZTF93 | Long             | EC               | RF                | US        |   5463733 | NS      | $488730948.43  | 14.79%            |  |  |  | No            |                  1 | On Loan: No      |
| State Street Global All Cap Equity ex-U.S. Index Portfolio | State Street Global All Cap Equity ex-U.S. Index Portfolio | CUSIP: 85749T764<br>LEI: 5493006RH3PQC41AJP68 | Long             | EC               | RF                | US        |   7400804 | NS      | $1005621260.56 | 30.43%            |  |  |  | No            |                  1 | On Loan: No      |
| State Street Global Advisors                               | State Street Institutional US Government Money Market Fund | CUSIP: 857492706<br>LEI: 549300BZ5TGIFZUZDZ37 | Long             | STIV             | RF                | US        |   6145749 | NS      | $6145748.91    | 0.19%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-07-29

**Name of Applicant:** STATE STREET INSTITUTIONAL INVESTMENT TRUST

**Signature:** Arthur Jensen

**Name of Signer:** Arthur Jensen

**Title:** Deputy Treasurer