# EDGAR Filing Document

**Accession Number:** 0001107414
**File Stem:** 0001752724-25-211197
**Filing Date:** 2025-8
**Character Count:** 8941
**Document Hash:** 37af0168a3215a6fab1383255d05efab
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-211197.hdr.sgml**: 20250828

**ACCESSION NUMBER**: 0001752724-25-211197

**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:** 251270202

**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 2025 Fund (Series ID: S000046036)

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

## 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 2025 Fund

- **b. EDGAR series identifier (if any):** S000046036

- **c. LEI of Series:** 549300OOU2Y33S2MPX73

**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:** $2002674715.93

**Total Liabilities:** $42072161.98

**Net Assets:** $1960602553.95

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000232295 | 0.33%                | 2.22%                | 2.50%                |
| Class ID C000143868 | 0.42%                | 2.24%                | 2.52%                |
| Class ID C000143869 | 0.41%                | 2.22%                | 2.58%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-8362244.40             | $10934414.77                               |
| Month 2  | $136932.44               | $38348887.69                               |
| Month 3  | $7423.76                 | $44538031.36                               |

### 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        |  18363152 | NS      | $351470729.28 | 17.93%            |  |  |  | No            |                  1 | On Loan: —       |
| SPDR Portfolio Short Term Treasury ETF                           | SPDR Portfolio Short Term Treasury ETF                           | CUSIP: 78468R101<br>LEI: 549300CVHDNMTIUMZ693 | Long             | EC               | RF                | US        |   3661872 | NS      | $107256230.88 | 5.47%             |  |  |  | No            |                  1 | On Loan: —       |
| SPDR Bloomberg High Yield Bond ETF                               | SPDR Bloomberg High Yield Bond ETF                               | CUSIP: 78468R622<br>LEI: 549300NCLW2248PN7J24 | Long             | EC               | RF                | US        |   1407340 | NS      | $136891961.80 | 6.98%             |  |  |  | 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        |   2500378 | NS      | $68085292.94  | 3.47%             |  |  |  | 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        |    175919 | NS      | $57006665.37  | 2.91%             |  |  |  | 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        |  16997100 | NS      | $16997100.00  | 0.87%             |  |  |  | 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        |    760327 | NS      | $428930634.02 | 21.88%            |  |  |  | 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        |   1512781 | NS      | $1512780.58   | 0.08%             |  |  |  | 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        |   2219600 | NS      | $97973144.00  | 5.00%             |  |  |  | No            |                  1 | On Loan: —       |
| SPDR Portfolio Short Term Corporate Bond ETF                     | SPDR Portfolio Short Term Corporate Bond ETF                     | CUSIP: 78464A474<br>LEI: 549300D2BO7L1J2SO973 | Long             | EC               | RF                | US        |   1016911 | NS      | $30700543.09  | 1.57%             |  |  |  | No            |                  1 | On Loan: —       |
| State Street Aggregate Bond Index Portfolio                      | State Street Aggregate Bond Index Portfolio                      | CUSIP: 85749T772<br>LEI: 549300CYRPLDVB2ZTF93 | Long             | EC               | RF                | US        |   4368194 | NS      | $390734961.26 | 19.93%            |  |  |  | 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        |   2290936 | NS      | $311292347.26 | 15.88%            |  |  |  | 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        |   3784732 | NS      | $3784731.97   | 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