# SUMMA FOUR INC — DEF 14A

SUMMA FOUR INC of MANCHESTER, NH filed a DEF 14A with the SEC on 1998-06-26. Industry: Telephone & Telegraph Apparatus.

## Filing

- Filed: 1998-06-26
- Form: DEF 14A
- Accession: 0000950135-98-004007
- Registrant: SUMMA FOUR INC
- CIK: 0000900095
- Industry (SIC): Telephone & Telegraph Apparatus (3661)
- State of incorporation: DE
- Location: MANCHESTER, NH

## Filing timeline for this registrant (4)

| Filed | Form |
| --- | --- |
| [1998-10-05](https://search.stillhousedata.com/proxy/0000891618-98-004391) | DEFM14A |
| 1998-06-26 | DEF 14A |
| [1997-06-25](https://search.stillhousedata.com/proxy/0000950135-97-002800) | DEF 14A |
| [1996-06-19](https://search.stillhousedata.com/proxy/0000950135-96-002700) | DEF 14A |

## More

- [CIK 900095 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=900095&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0000950135-98-004007.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.