# DIAMOND SHAMROCK INC

DIAMOND SHAMROCK INC is a company headquartered in San Antonio, TX, United States.

## Company overview

- **Legal name:** DIAMOND SHAMROCK INC
- **Classification:** Company
- **Industry (SIC):** 2911 — Petroleum Refining
- **Headquarters:** San Antonio, TX, United States
- **Incorporated in:** DE
- **Fiscal year end:** December 31
- **SEC CIK:** 0000810316

## About

DIAMOND SHAMROCK INC is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000810316, and its reported industry is Petroleum Refining. The retained history contains 12 filings, including 10-Q filed on 1996-11-14. 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-Q — filed 1996-11-14 — period 1996-09-30
- Form DEF 14A — filed 1996-10-31 — period 1996-12-03 — DEF 14A
- Form 8-K — filed 1996-10-11 — period 1995-12-14
- Form SC 13D — filed 1996-10-01 — SCHEDULE 13D
- Form SC 13D — filed 1996-10-01 — SC 13D
- Form 10-K/A — filed 1996-10-01 — period 1995-12-31
- Form 8-K — filed 1996-09-27 — period 1996-09-26
- Form 10-Q — filed 1996-08-14 — period 1996-06-30
- Form SC 13G — filed 1996-08-09 — AMENDMENT - DIAMOND SHAMROCK INC
- Form 8-K — filed 1996-06-21 — period 1996-06-20
- Form 10-Q — filed 1996-05-14 — period 1996-03-31
- Form 10-K — filed 1996-03-22 — period 1995-12-31

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Updated: 2026-10-23T22:21:44Z

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