# MAGMA COPPER CO

MAGMA COPPER CO is a company headquartered in Tucson, AZ, United States.

## Company overview

- **Legal name:** MAGMA COPPER CO
- **Classification:** Company
- **Industry (SIC):** 3330 — Primary Smelting & Refining of Nonferrous Metals
- **Headquarters:** Tucson, AZ, United States
- **Incorporated in:** DE
- **Fiscal year end:** December 31
- **SEC CIK:** 0000061425

## About

MAGMA COPPER CO is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000061425, and its reported industry is Primary Smelting & Refining of Nonferrous Metals. The retained history contains 12 filings, including 8-K filed on 1996-01-17. 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 8-K — filed 1996-01-17 — period 1996-01-05 — FORM 8-K
- Form SC 13D — filed 1996-01-12 — SCHEDULE 13D
- Form SC 13D — filed 1995-12-26 — INITIAL SCHEDULE 13D
- Form 8-K — filed 1995-12-11 — period 1995-11-30 — FORM 8-K
- Form SC 13G — filed 1995-12-08
- Form SC 13G — filed 1995-12-08
- Form 10-Q — filed 1995-11-14 — period 1995-09-30
- Form 10-Q — filed 1995-08-08 — period 1995-06-30
- Form 8-K — filed 1995-06-23 — period 1995-06-14 — FORM 8-K
- Form 8-K — filed 1995-05-24 — period 1995-05-15 — FORM 8-K CURRENT REPORT
- Form 10-Q — filed 1995-05-12 — period 1995-03-31
- Form DEF 14A — filed 1995-04-07 — period 1994-12-31 — NOTICE OF MEETING AND PROXY STATEMENT

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Updated: 2026-10-23T22:24:09Z

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