# SIIT Extended Market Index Fund — new fund registration

SEI INSTITUTIONAL INVESTMENTS TRUST registered 1 new fund series on Form 485APOS, filed 2011-11-10. Featured series: SIIT Extended Market Index Fund.

## Registration

- Registrant / trust: SEI INSTITUTIONAL INVESTMENTS TRUST
- CIK: 0000939934
- Form: 485APOS
- Filed: 2011-11-10
- State of incorporation: MA
- Accession: 0001104659-11-063228
- Reported net assets: $1.3B

## Series & classes (1)

| Series | Class | Ticker | New |
| --- | --- | --- | --- |
| [SIIT Extended Market Index Fund](https://search.stillhousedata.com/fund/S000035814) | Class A | SMXAX | Yes |

## Fees (from the effective prospectus)

- 12b-1 fee: 0.00%
- Gross expense ratio: 0.20%
- Management fee: 0.12%
- Other expenses: 0.08%

## Investment objective

Seeks investment results that approximate, as closely as practicable and before expenses, the performance of the Russell Small Cap Completeness Index.

## Advisers

- [SEI Investments Management Corporation (Advisor)](https://search.stillhousedata.com/firm/105146)
- [SSGA FUNDS MANAGEMENT, INC. (Subadvisor)](https://search.stillhousedata.com/firm/111242)

## Other filings by this registrant (15)

- [485APOS — 2023-07-28](https://search.stillhousedata.com/launch/0001104659-23-085376)
- [NT NPORT-P — 2022-12-13](https://search.stillhousedata.com/launch/0001752724-22-277899)
- [485APOS — 2020-07-30](https://search.stillhousedata.com/launch/0001104659-20-088404)
- [485APOS — 2017-11-01 (1 new series)](https://search.stillhousedata.com/launch/0001104659-17-065206)
- [485APOS — 2016-11-18 (1 new series)](https://search.stillhousedata.com/launch/0001104659-16-158136)
- [485APOS — 2015-07-30](https://search.stillhousedata.com/launch/0001104659-15-054889)
- [485APOS — 2015-07-13 (1 new series)](https://search.stillhousedata.com/launch/0001104659-15-050884)
- [485APOS — 2015-01-29](https://search.stillhousedata.com/launch/0001104659-15-005432)
- [485APOS — 2014-10-31 (1 new series)](https://search.stillhousedata.com/launch/0001104659-14-075590)
- [485APOS — 2014-07-30](https://search.stillhousedata.com/launch/0001104659-14-055003)
- [485APOS — 2014-05-01 (1 new series)](https://search.stillhousedata.com/launch/0001104659-14-033568)
- [485APOS — 2013-10-01 (1 new series)](https://search.stillhousedata.com/launch/0001104659-13-073487)

## More

- [Registrant profile: SEI INSTITUTIONAL INVESTMENTS TRUST](https://search.stillhousedata.com/registrant/939934)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/launch/0001104659-11-063228.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.