# QUAKER STATE CORP

QUAKER STATE CORP is a company headquartered in Irving, TX, United States.

## Company overview

- **Legal name:** QUAKER STATE CORP
- **Classification:** Company
- **Industry (SIC):** 2911 — Petroleum Refining
- **Headquarters:** Irving, TX, United States
- **Incorporated in:** DE
- **Fiscal year end:** December 31
- **SEC CIK:** 0000081381

## About

QUAKER STATE CORP is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000081381, and its reported industry is Petroleum Refining. The retained history contains 12 filings, including 10-Q filed on 1998-11-12. 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-Q — filed 1998-11-12 — period 1998-09-30 — FORM 10-Q FOR QUARTER ENDED SEPTEMBER 30, 1998
- Form 10-Q — filed 1998-08-07 — period 1998-06-30 — FORM 10-Q FOR QUARTER ENDED JUNE 30, 1998
- Form 10-Q — filed 1998-05-12 — period 1998-03-31 — FORM 10-Q FOR QUARTER ENDED MARCH 31, 1998
- Form 8-K — filed 1998-04-21 — period 1998-04-14 — FORM 8-K
- Form DEF 14A — filed 1998-03-27 — period 1998-05-15 — DEFINITIVE PROXY STATEMENT
- Form SC 13G — filed 1998-02-09
- Form 8-K — filed 1997-11-17 — period 1997-11-03 — FORM 8-K
- Form 10-Q — filed 1997-11-12 — period 1997-09-30 — FORM 10-Q FOR QUARTER ENDED SEPTEMBER 30, 1997
- Form 10-Q — filed 1997-08-12 — period 1997-06-30 — FORM 10-Q FOR QUARTER ENDED JUNE 30, 1997
- Form 8-K — filed 1997-08-07 — period 1997-07-23 — FORM 8-K DATED JULY 23, 1997
- Form 10-Q — filed 1997-05-13 — period 1997-03-31 — FORM 10-Q FOR QUARTER ENDED MARCH 31, 1997
- Form DEF 14A — filed 1997-03-27 — period 1997-05-16 — DEFINITIVE PROXY STATEMENT

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Updated: 2026-10-23T22:43:49Z

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