Tenants
One Allen Center
- Coastal Water Authority - Suite 2800
- Hess Corporation - Exploration and Production
- Kinder Morgan
- Kinder Morgan Energy Partners
Two Allen Center
- Qatar Airways, Suite 1600
Three Allen Center
- The headquarters of Plains All American Pipeline, Suite 1600
- EOG Resources had space in Allen Center; in 2006 it announced that it was moving to the Heritage Plaza. It planned to move 400 employees there by early 2007. When it occupied portions of Three Allen Center, EOG had 165,000 square feet (15,300 m2) of space occupied scattered throughout Three Allen Center.
At one point the Consulate-General of Switzerland in Houston resided in Suite 1040 of Two Allen Center; the mission closed in 2006.
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