# EDGAR Filing Document

**Accession Number:** 0001107414
**File Stem:** 0001410368-26-020053
**Filing Date:** 2026-2
**Character Count:** 8952
**Document Hash:** 3995ae1c2a81d73a6186f1ece1f211de
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-020053.hdr.sgml**: 20260226

**ACCESSION NUMBER**: 0001410368-26-020053

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260226

**DATE AS OF CHANGE**: 20260226

**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:** 26689882

**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 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           |

## 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 Congress Street

  - **City:** Boston

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02114

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

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

- **a. Name of Series:** State Street Target Retirement 2030 Fund

- **b. EDGAR series identifier (if any):** S000046037

- **c. LEI of Series:** 5493000QQMN1HJN7DR59

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

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

- **b. Date as of which information is reported:** 2025-12-31

**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:** $3395508535.27

**Total Liabilities:** $50586021.83

**Net Assets:** $3344922513.44

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000143872 | 1.23%                | 0.41%                | 0.33%                |
| Class ID C000143873 | 1.22%                | 0.40%                | 0.48%                |
| Class ID C000232296 | 1.23%                | 0.34%                | 0.45%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $20918476.88             | $15696887.89                               |
| Month 2  | $3289270.05              | $5301080.17                                |
| Month 3  | $2731224.02              | $-49606557.17                              |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| State Street Global Advisors                                     | State Street Navigator Securities Lending Portfolio II           | CUSIP: 857492706<br>LEI: 5493008BJIBKQ5KTIF74 | Long             | STIV             | RF                | US        |   1436000 | NS      | $1436000.00   | 0.04%             |  |  |  | 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        |   2215937 | NS      | $99761483.74  | 2.98%             |  |  |  | No            |                  1 | On Loan: —       |
| State Street SPDR Portfolio Short Term Corporate Bond ETF        | State Street SPDR Portfolio Short Term Corporate Bond ETF        | CUSIP: 78464A474<br>LEI: 549300D2BO7L1J2SO973 | Long             | EC               | RF                | US        |    231986 | NS      | $7005977.20   | 0.21%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street SPDR Portfolio Long Term Treasury ETF               | State Street SPDR Portfolio Long Term Treasury ETF               | CUSIP: 78464A664<br>LEI: 549300GYQKAMF6JUVI06 | Long             | EC               | RF                | US        |   5034048 | NS      | $133251250.56 | 3.98%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street SPDR Portfolio Short Term Treasury ETF              | State Street SPDR Portfolio Short Term Treasury ETF              | CUSIP: 78468R101<br>LEI: 549300CVHDNMTIUMZ693 | Long             | EC               | RF                | US        |    732758 | NS      | $21455154.24  | 0.64%             |  |  |  | No            |                  1 | On Loan: No      |
| SPDR Bloomberg Enhanced Roll Yield Commodity Strategy NO K-1 ETF | SPDR Bloomberg Enhanced Roll Yield Commodity Strategy NO K-1 ETF | CUSIP: 78468R440<br>LEI: 984500D58F9EV0X92F27 | Long             | EC               | RF                | US        |    819827 | NS      | $23406060.85  | 0.70%             |  |  |  | No            |                  1 | On Loan: No      |
| State Street SPDR Bloomberg High Yield Bond ETF                  | State Street SPDR Bloomberg High Yield Bond ETF                  | CUSIP: 78468R622<br>LEI: 549300NCLW2248PN7J24 | Long             | EC               | RF                | US        |   2213780 | NS      | $215201553.80 | 6.43%             |  |  |  | No            |                  1 | On Loan: —       |
| State Street SPDR Bloomberg 1-10 Year TIPS ETF                   | State Street SPDR Bloomberg 1-10 Year TIPS ETF                   | CUSIP: 78468R861<br>LEI: 549300SS31WHLX0B1I97 | Long             | EC               | RF                | US        |  19822054 | NS      | $378204790.32 | 11.31%            |  |  |  | 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        |    427323 | NS      | $141781638.52 | 4.24%             |  |  |  | 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        |   1538418 | NS      | $947588803.01 | 28.33%            |  |  |  | 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        |   5176792 | NS      | $762593180.02 | 22.80%            |  |  |  | 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        |   7232005 | NS      | $650735801.17 | 19.45%            |  |  |  | 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        |   7764575 | NS      | $7764575.41   | 0.23%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-01-16

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

**Signature:** Arthur Jensen

**Name of Signer:** Arthur Jensen

**Title:** Deputy Treasurer