- Valero Energy
(NYSE:VLO)
- San Antonio
Diversified energy company engaged in the production, transportation, and marketing of clean-burning fuels and natural gas.
www.valero.com
- Tesoro Petroleum
(NYSE:TSO)
- San Antonio
Refiner and marketer of petroleum products.
www.tesoropetroleum.com
- Southern Union Company@ (NYSE:SUG)
- Austin
dir.yahoo.com/.../Distributors/Southern_Union_Company
- CBG Corporation
- Austin
Designs and manufactures sensors and instruments used in oil and gas exploration, drilling, and production.
www.cbgcorp.com
- Ruwwe & Glasscock Oil and Gas Exploration
- Austin
Explores with 3D seismic technology; exploring proven Canyon reef apron trend (Horseshoe Atoll) & the Aspermont trend (Stonewall Co).
www.ruwco.com
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