# STATE STREET INSTITUTIONAL INVESTMENT TRUST

STATE STREET INSTITUTIONAL INVESTMENT TRUST (CIK 1107414) is an SEC-registered fund company with 30 reporting fund series and $97.3B in net assets as of 2026-03-31.

## Registrant

- CIK: 1107414
- File number: 811-09819
- LEI: 549300P1E098W6ES7M39
- Address: One Congress Street, Boston, US-MA, 02114
- Phone: (800) 647-7327
- Net assets: $97.3B
- Total assets: $98.7B
- Fund series: 30
- Latest report: 2026-03-31

## Fund series (30)

_Showing 25 of 30 series._

| Series | Net assets |
| --- | --- |
| [State Street Equity 500 Index II Portfolio](https://search.stillhousedata.com/fund/S000046029) | $21.1B |
| [State Street Equity 500 Index Fund](https://search.stillhousedata.com/fund/S000010695) | $13.5B |
| [State Street Global All Cap Equity ex-U.S. Index Portfolio](https://search.stillhousedata.com/fund/S000046032) | $11.1B |
| [State Street Aggregate Bond Index Portfolio](https://search.stillhousedata.com/fund/S000046031) | $6.2B |
| [STATE STREET HEDGED INTERNATIONAL DEVELOPED EQUITY INDEX FUND](https://search.stillhousedata.com/fund/S000049192) | $4.3B |
| [State Street Global All Cap Equity ex-U.S. Index Fund](https://search.stillhousedata.com/fund/S000044030) | $3.9B |
| [State Street U.S. Core Equity Fund](https://search.stillhousedata.com/fund/S000071466) | $3.7B |
| [State Street Target Retirement 2035 Fund](https://search.stillhousedata.com/fund/S000046038) | $3.6B |
| [State Street Target Retirement 2040 Fund](https://search.stillhousedata.com/fund/S000046039) | $3.4B |
| [State Street Target Retirement 2030 Fund](https://search.stillhousedata.com/fund/S000046037) | $3.3B |
| [State Street Aggregate Bond Index Fund](https://search.stillhousedata.com/fund/S000010699) | $3.3B |
| [State Street Target Retirement 2045 Fund](https://search.stillhousedata.com/fund/S000046040) | $3.2B |
| [State Street Target Retirement 2050 Fund](https://search.stillhousedata.com/fund/S000046023) | $2.7B |
| [STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO](https://search.stillhousedata.com/fund/S000050332) | $2.6B |
| [State Street Target Retirement 2055 Fund](https://search.stillhousedata.com/fund/S000046024) | $2.2B |
| [State Street Target Retirement 2025 Fund](https://search.stillhousedata.com/fund/S000046036) | $1.9B |
| [State Street Target Retirement 2060 Fund](https://search.stillhousedata.com/fund/S000046025) | $1.6B |
| [State Street Target Retirement Fund](https://search.stillhousedata.com/fund/S000046033) | $1.4B |
| [State Street Target Retirement 2020 Fund](https://search.stillhousedata.com/fund/S000046035) | $801.7M |
| [STATE STREET SMALL/MID CAP EQUITY INDEX FUND](https://search.stillhousedata.com/fund/S000050331) | $767.4M |
| [State Street Income Fund](https://search.stillhousedata.com/fund/S000071465) | $664.2M |
| [STATE STREET EMERGING MARKETS EQUITY INDEX FUND](https://search.stillhousedata.com/fund/S000050542) | $646.7M |
| [State Street Balanced Index Fund](https://search.stillhousedata.com/fund/S000082802) | $583.8M |
| [State Street Target Retirement 2065 Fund](https://search.stillhousedata.com/fund/S000067360) | $554.6M |
| [State Street Target Retirement 2015 Fund](https://search.stillhousedata.com/fund/S000046034) | $280.6M |

## Largest reported holdings (across all series)

| Holding | Value |
| --- | --- |
| [State Street Equity 500 Index II Portfolio](https://search.stillhousedata.com/security/85749T756) | $13.5B |

## More

- [CIK 1107414 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1107414&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/registrant/1107414.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.