# COMMONWEALTH GAS CO

COMMONWEALTH GAS CO is a company headquartered in Cambridge, MA, United States.

## Company overview

- **Legal name:** COMMONWEALTH GAS CO
- **Classification:** Company
- **Industry (SIC):** 4922 — Natural Gas Transmission
- **Headquarters:** Cambridge, MA, United States
- **Incorporated in:** MA
- **Fiscal year end:** December 31
- **SEC CIK:** 0000022620

## About

COMMONWEALTH GAS CO is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000022620, and its reported industry is Natural Gas Transmission. The retained history contains 12 filings, including 10-K filed on 2000-04-14. 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.

## Recent SEC filings

- Form 10-K — filed 2000-04-14 — period 1999-12-31 — FORM 10-K
- Form 10-Q — filed 1999-11-15 — period 1999-09-30 — COMMONWEALTH GAS CO. 1999 3RD QTR FORM 10-Q
- Form 10-Q — filed 1999-08-16 — period 1999-06-30 — COMMONWEALTH GAS CO. FORM 10-Q 6/30/1999
- Form 10-Q — filed 1999-05-17 — period 1999-03-31 — COMMONWEALTH GAS COMPANY FORM 10-Q
- Form 10-K — filed 1999-03-31 — period 1998-12-31 — COMMONWEALTH GAS 1998 FORM 10-K
- Form 10-Q — filed 1998-11-13 — period 1998-09-30 — COMMONWEALTH GAS COMPANY FORM 10-Q
- Form 10-Q — filed 1998-08-14 — period 1998-06-30 — COMMONWEALTH GAS COMPANY FORM 10-Q
- Form 10-Q — filed 1998-05-15 — period 1998-03-31 — COMMONWEALTH GAS COMPANY FORM 10-Q
- Form 10-K — filed 1998-03-31 — period 1997-12-31 — COMMONWEALTH GAS CO. 1997 FORM 10-K
- Form 10-Q — filed 1997-11-14 — period 1997-09-30 — COMMONWEALTH GAS COMPANY
- Form 10-Q — filed 1997-08-14 — period 1997-06-30 — COMMONWEALTH GAS COMPANY FORM 10-Q
- Form 10-Q — filed 1997-05-14 — period 1997-03-31 — COMMONWEALTH GAS COMPANY FORM 10-Q

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Updated: 2026-10-23T22:01:01Z

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