# PREMCOR REFINING GROUP INC

PREMCOR REFINING GROUP INC is a company headquartered in Old Greenwich, CT, United States.

## Company overview

- **Legal name:** PREMCOR REFINING GROUP INC
- **Former names in filing history:** CLARK REFINING & MARKETING INC (1993-11-12 to 2000-04-13)
- **Classification:** Company
- **Industry (SIC):** 2911 — Petroleum Refining
- **Headquarters:** Old Greenwich, CT, United States
- **Incorporated in:** DE
- **Fiscal year end:** December 31
- **SEC CIK:** 0000020762

## About

PREMCOR REFINING GROUP INC is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000020762, and its reported industry is Petroleum Refining. The retained history contains 12 filings, including 8-K filed on 2005-09-07. 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 2005-09-07 — period 2005-08-31 — THE PREMCOR REFINING GROUP INC.
- Form 8-K — filed 2005-08-08 — period 2005-08-08 — FORM 8-K
- Form 10-Q — filed 2005-07-29 — period 2005-06-30 — FORM 10-Q FOR QUARTER ENDED JUNE 30, 2005
- Form 10-Q — filed 2005-05-05 — period 2005-03-31 — FORM 10-Q
- Form 10-K — filed 2005-03-07 — period 2004-12-31 — FORM 10-K
- Form 8-K — filed 2004-12-01 — period 2004-11-29 — FORM 8-K
- Form 10-Q — filed 2004-11-01 — period 2004-09-30 — FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2004
- Form 10-Q — filed 2004-08-05 — period 2004-06-30 — FORM 10-Q
- Form 8-K — filed 2004-05-12 — period 2004-05-01 — FORM 8-K
- Form 10-Q — filed 2004-04-30 — period 2004-03-31 — FORM 10-Q
- Form 8-K — filed 2004-04-22 — period 2004-04-20 — FORM 8-K
- Form 8-K — filed 2004-04-15 — period 2003-04-13 — FORM 8-K

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

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