# STATE STREET INSTITUTIONAL INVESTMENT TRUST — 425

STATE STREET INSTITUTIONAL INVESTMENT TRUST of BOSTON, MA filed a 425 with the SEC on 2021-04-19.

## Filing

- Filed: 2021-04-19
- Form: 425
- Accession: 0001193125-21-121175
- Registrant: STATE STREET INSTITUTIONAL INVESTMENT TRUST
- CIK: 0001107414
- State of incorporation: MA
- Location: BOSTON, MA

## Documents (2)

| Seq | Type | Description |
| --- | --- | --- |
| 1 | 425 | STATE STREET INSTITUTIONAL INVESTMENT TRUST |
| 2 | GRAPHIC | GRAPHIC |

## Filing timeline for this registrant (4)

| Filed | Form |
| --- | --- |
| 2021-04-19 | 425 |
| [2021-04-19](https://search.stillhousedata.com/proxy/0001193125-21-121174) | 425 |
| [2010-02-09](https://search.stillhousedata.com/proxy/0000950123-10-010480) | DEF 14A |
| [2010-01-28](https://search.stillhousedata.com/proxy/0000950123-10-006041) | PRE 14A |

## Co-filers (1)

- GENERAL ELECTRIC RSP U.S. EQUITY FUND

## 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/proxy/0001193125-21-121175.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

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.