Our History

We're not only family owned, but we're an Oklahoma family. This may help explain the way we like to do business: person to person and face to face.

We’ve been taking care of families and the businesses they own for more than forty years. And as we’ve grown–one customer at a time–we’ve never forgotten what drew them in the first place: great bankers and staff who deliver on our very one-to-one way of banking. It's a principle that offers every customer the personal attention they deserve, and one that’s guided all three generations of Grand Bank.


Founders of the Grand Bank
From simple beginnings reaching back three generations, Grand Bank understands the heart and soul of the entrepreneur. It’s where “family owned and operated” still means something, a rarity in today’s banking world. This proud legacy provides them with unique insight into what the success of a small business ultimately means. It’s about all those whose lives a business touches. Every customer and employee who walks in your door.

Timeline of the Grand Bank history

1975 Founded in Grove, Oklahoma as Grand Lake Bank 2007 Grand Bank named in top 25 U.S. banks for return on equity
1982 Grand Lake Bank purchased by Paul Buerge and sons 2013 Third generation Austin Buerge becomes President & CEO
1989 Son Robin Buerge is name Chairman 2014 Grand Bank named in Top 200 Healthiest banks in America
1996 Second location opens in Claremore 2015 Grand Bank named in Top 200 Healthiest Banks in America
1997 Loan production office opens in Tulsa 2020 S&P Global named Grand Bank in Top 100 best performing community banks under $3 billion in assets
1998 Tulsa, now a full-service bank, is made headquarters 2022 April 1, 2022, Grand Bank opens full-service banking center in Dallas, TX
2005 Renamed Grand Bank with the addition of Bixby location 2023 October 10, 2023, Grand Bank opens full-service banking center in Houston, TX
2007 Grove location sold to focus on greater Tulsa area location

Grand Bank Cares

Almost every business is asked to donate money or “buy a table” at a local charity event, but a program we call Grand Bank Cares goes a step farther. Every month, somewhere in the Tulsa area, you’ll see employees of Grand Bank in their Hearts of Lions t-shirts, volunteering to support a local charity in need.

Recent examples include the United Way Day of Caring and events in support of Emergency Infant Services, Bixby Outreach, Irongate and Centers for Individuals with Physical Challenges.

United Way, "live united", logo

Why? Because we want to be a vital part of the communities we serve. That's what good neighbors do.