# ULTRAMAR DIAMOND SHAMROCK CORP

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

## Company overview

- **Legal name:** ULTRAMAR DIAMOND SHAMROCK CORP
- **Former names in filing history:** ULTRAMAR CORP /DE (1994-03-28 to 1996-10-29)
- **Classification:** Company
- **Industry (SIC):** 2911 — Petroleum Refining
- **Headquarters:** San Antonio, TX, United States
- **Incorporated in:** DE
- **Fiscal year end:** December 31
- **SEC CIK:** 0000887207

## About

ULTRAMAR DIAMOND SHAMROCK CORP is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000887207, and its reported industry is Petroleum Refining. The retained history contains 12 filings, including 10-Q filed on 2001-11-14. 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 2001-11-14 — period 2001-09-30
- Form 10-Q — filed 2001-08-14 — period 2001-06-30 — SECOND QUARTER 10Q
- Form 8-K — filed 2001-05-18 — period 2001-05-06 — JOINT PRESS RELEASE
- Form 10-Q — filed 2001-05-11 — period 2001-03-31 — 1ST QTR
- Form 8-K — filed 2001-05-10 — period 2001-05-06 — 8-K
- Form SC 13D — filed 2001-04-26 — ULTRAMAR DIAMOND SHAMROCK CORP F/SHAMROCK LOGISTIC
- Form DEF 14A — filed 2001-03-27 — period 2001-05-01 — DEFINITIVE PROXY
- Form 10-K — filed 2001-03-21 — period 2000-12-31 — ANNUAL REPORT
- Form SC 13G — filed 2001-02-13
- Form SC 13G — filed 2000-12-26
- Form 10-Q — filed 2000-11-14 — period 2000-09-30 — 3RD QUARTER 10Q
- Form 8-K — filed 2000-09-14 — period 2000-08-31 — 8-K

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Updated: 2026-10-23T22:31:33Z

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