Antonio Sanchez

Director/Board Member at INTERNATIONAL BANCSHARES CORPORATION

Net worth: 431 M $ as of 2026-07-30

83 year

65 connections

Consumer Services

Energy Minerals

Finance

Profile

Antonio R.
Sanchez is the founder of Sanchez Oil & Gas Corp., established in 1972, serving as Chairman.
Current jobs include Independent Director at International Bancshares Corp.
since 1995, Director at A R Tony & Maria J Sanchez Family Foundation, Trustee at Baylor College of Medicine, Assistant Professor at The University of Texas M.D.
Anderson Cancer Center, and Trustee at Alicia M Sanchez Charitable Lead Annuity Trust.
Former jobs include Executive Chairman at Mesquite Energy, Inc. from 2012 to 2020 and Director at Zix Corp.
Education includes undergraduate and graduate degrees from St. Mary's University.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
INTERNATIONAL BANCSHARES CORPORATION 9.05%	2026-03-31	5,625,867 ( 9.05% )	431 M $	2026-07-30

Antonio Sanchez active positions

Companies	Position	Start
INTERNATIONAL BANCSHARES CORPORATION	Director/Board Member	1994-12-31
Sanchez Oil & Gas Corp. Sanchez Oil & Gas Corp. Oil & Gas ProductionEnergy Minerals Explores and produces oil and natural gas	Founder	1971-12-31
Baylor College of Medicine Baylor College of Medicine Other Consumer ServicesConsumer Services Functions as a College/University	Director/Board Member	-
A R Tony & Maria J Sanchez Family Foundation A R Tony & Maria J Sanchez Family Foundation Investment Trusts/Mutual FundsMiscellaneous A R Tony & Maria J Sanchez Family Foundation is a company that operates in the Non-Profit & Charitable Organizations industry. The company is based in Laredo, TX.	Director/Board Member	-
The University of Texas M.D. Anderson Cancer Center The University of Texas M.D. Anderson Cancer Center Other Consumer ServicesConsumer Services Provides cancer patient care, research and prevention for cancer	Corporate Officer/Principal	-
Alicia M Sanchez Charitable Lead Annuity Trust	Director/Board Member	-

All active positions of Antonio Sanchez

Former positions of Antonio Sanchez

Companies	Position	End
SANCHEZ ENERGY CORP	Chairman	2019-12-31
ZIX CORPORATION	Director/Board Member	-

See the detail of Antonio Sanchez's experience

Training of Antonio Sanchez

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

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Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

See the personal network

Linked companies

Private companies	9
International Bancshares Corp. International Bancshares Corp. Regional BanksFinance Operates as a bank holding company whose subsidiary provides commercial banking services	Finance
Zix Corp. Zix Corp. Packaged SoftwareTechnology Services Develops AI based cybersecurity platform	Technology Services
Mesquite Energy, Inc. Mesquite Energy, Inc. Integrated OilEnergy Minerals Operates as an oil and natural gas exploration & production company	Energy Minerals
St. Mary's University St. Mary's University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Baylor College of Medicine Baylor College of Medicine Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
The University of Texas M.D. Anderson Cancer Center The University of Texas M.D. Anderson Cancer Center Other Consumer ServicesConsumer Services Provides cancer patient care, research and prevention for cancer	Consumer Services
Sanchez Oil & Gas Corp. Sanchez Oil & Gas Corp. Oil & Gas ProductionEnergy Minerals Explores and produces oil and natural gas	Energy Minerals
A R Tony & Maria J Sanchez Family Foundation A R Tony & Maria J Sanchez Family Foundation Investment Trusts/Mutual FundsMiscellaneous A R Tony & Maria J Sanchez Family Foundation is a company that operates in the Non-Profit & Charitable Organizations industry. The company is based in Laredo, TX.	Miscellaneous
Alicia M Sanchez Charitable Lead Annuity Trust