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SUMMA FOUR INC
SUMMA FOUR INC is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000900095, and its reported industry is...
Overview
SUMMA FOUR INC is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000900095, and its reported industry is Telephone & Telegraph Apparatus. The retained history contains 12 filings, including SC 13D filed on 1998-10-08. Each filing retains its accession, filing date and original SEC document link. This historical evidence does not establish current registration, listing, ownership or financial condition.
Company overview
- Legal name
- SUMMA FOUR INC
- Classification
- Company
- Industry (SIC)
- 3661 — Telephone & Telegraph Apparatus
- Headquarters
- Manchester, NH, United States
- Incorporated in
- DE
- Fiscal year end
- March 31
- SEC CIK
- 0000900095
Recent SEC filings
| Form | Filed | Period | Filing |
|---|---|---|---|
| SC 13D | — | Form SC 13D | |
| 10-Q | SUMMA FOUR, LTD. | ||
| 8-K | SUMMA FOUR, INC. | ||
| DEF 14A | SUMMA FOUR, INC. | ||
| 10-K | SUMMA FOUR, INC. | ||
| 10-K/A | SUMMA FOUR, INC. AMENDMENT NO.2 FOR 31-MAR-1994 | ||
| 10-K/A | SUMMA FOUR, INC. 3/31/97 AMENDMENT NO. 1 | ||
| 10-K/A | SUMMA FOUR, INC. 3/3/96 AMENDMENT NO. 1 | ||
| 8-K | SUMMA FOUR | ||
| SC 13G | — | SCHEDULE 13G | |
| 10-Q | SUMMA FOUR, INC. | ||
| SC 13G | — | 1997 SCHEDULE 13G - SUMMA FOUR INC |
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