Sign in

Private company

Amegy Bank of Texas

Logo: Amegy Bank of Texas, Public domain, via Wikimedia Commons3

American banking company

Amegy Bank of Texas (previously known as Southwest Bank of Texas) is an American bank operating in Texas that is a division(until 2018 a subsidiary) of Zions Bancorporation. Operating primarily in Houston, Dallas-Fort Worth, and central Texas, the bank is headquartered in the Five Post Oak Park building in Houston’s Post Oak Park business park. As of 2010, it was the largest bank in Houston, with $11 billion in assets, 80 locations, and 2,000 employees in Texas.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1989Founded1

See how the biggest companies compare on our leaderboards

5PosTOakPark
Photo: WhisperToMe, CC0, via Wikimedia Commons5

Amegy Bank of Texas (previously known as Southwest Bank of Texas) is an American bank operating in Texas that is a division(until 2018 a subsidiary) of Zions Bancorporation. Operating primarily in Houston, Dallas-Fort Worth, and central Texas, the bank is headquartered in the Five Post Oak Park building in Houston’s Post Oak Park business park. As of 2010, it was the largest bank in Houston, with $11 billion in assets, 80 locations, and 2,000 employees in Texas.2

The story

The Northwest Crossing National Bank was founded in 1989. Walter Johnson joined the company in February 1990. While he was the head of the company, its name changed to the Southwest Bank of Texas. Its second capital offering occurred in December 1992. Its first public offering occurred in January 1997.

On the afternoon of Tuesday January 25, 2005, the Southwest Bank of Texas announced that it would change its name to Amegy Bank of Texas. The name change took effect on March 7 of that year. Southwest Bancorporation of Texas Inc., the parent company, was scheduled to change its name in May of that year, pending approval from the company shareholders. The NASDAQ symbol for the company was changed from SWBT to ANBK.

In July 2005, Zions Bancorporation announced that it would buy Amegy Bancorp for $1.7 billion in cash and stock.

In 2007, Amegy Bank signed a definitive merger/purchase agreement with InterContinental National Bank of San Antonio.

From Wikipedia’s article on Amegy Bank of Texas, shared under CC BY-SA 4.0.4

Products and brands

  • financial services

Listed on Wikidata.1

Subsidiaries and ownership

Owners

From Wikidata.1

Timeline

  1. 1989Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5