DIAMOND SHAMROCK INC

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a holder of more than 5% (Schedule 13D) (amendment)

General form for quarterly reports under Section 13 or 15(d)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Definitive Proxy Statement

Registration of Securities on Exchange (amendment)

1

Annual report pursuant to Section 13 or 15(d) (amendment)

Beneficial ownership report for a holder of more than 5% (Schedule 13D)

Beneficial ownership report for a holder of more than 5% (Schedule 13D)

Beneficial ownership report for a holder of more than 5% (Schedule 13D)

Current report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Current report pursuant to Section 13 or 15(d)

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Delayed or Continuous Offering

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d)

Definitive Proxy Statement

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

1

2,7

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d)

Prospectus Supplement for Delayed or Continuous Offering

Registration statement under Securities Act of 1933 (amendment)

Current report pursuant to Section 13 or 15(d)

Prospectus Supplement for Delayed or Continuous Offering

Post Effective Amendment to S-8

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Annual report pursuant to Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d)

Definitive Proxy Statement

Current report pursuant to Section 13 or 15(d)

Prospectus Supplement for Delayed or Continuous Offering

Current report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d)

Definitive Proxy Statement

MARBUT BOB

AMES B CHARLES

CLARK W H

CAVAZOS LAURO F

BRADFORD W E

ULTRAMAR CORP /DE

DIAMOND SHAMROCK INC

DIAMOND SHAMROCK INC