BOK Financial

BOK Financial Corporation is a Tulsa, Oklahoma-based financial services holding company whose principal banking subsidiary, BOKF, NA, serves consumers, businesses, institutions, governments, and specialized industries across the American Midwest and Southwest. The company is best known through the Bank of Oklahoma, Bank of Texas, and Bank of Albuquerque brands, while operating under the BOK Financial name in several other states. Its business scope extends beyond conventional branch banking to include commercial lending, retail deposits, treasury and transaction services, mortgage banking, investment management, securities, insurance, financial advice, asset management, and ATM and debit-card processing. The institution traces its origins to Exchange National Bank of Tulsa, established in 1910 with a strong connection to the capital needs of the regional energy economy. Its Tulsa presence became associated with prominent downtown buildings, including the structure now known as the 320 South Boston Building. In 1933 the bank adopted the National Bank of Tulsa name, and in 1975 it became Bank of Oklahoma to signal a broader statewide role. That same year it installed Oklahoma's first automated teller machine. By the end of the 1970s, the bank had reached $1 billion in assets, but the collapse of the Oklahoma energy market in the mid-1980s placed the institution under severe pressure. The Federal Deposit Insurance Corporation intervened in 1986, arranging a rescue that involved the merger of Bank of Oklahoma and Bank of Oklahoma, Tulsa and the issuance of preferred shares convertible into a near-total ownership stake. In 1991, George Kaiser acquired the institution in an FDIC-facilitated transaction. Under his ownership, the organization developed the BOK Financial identity and pursued expansion into nearby growth markets. Its geographic development included Arkansas in 1994, Texas in 1997, New Mexico in 1998, Colorado in 2003, Arizona in 2005, and Missouri in 2016. The company later consolidated several state operations under the BOK Financial brand, including its Colorado and Arizona operations in 2018 and its Arkansas, Kansas, and Missouri operations in 2019. BOK Financial retains a notable energy-finance heritage, but its modern platform is more diversified. Commercial and corporate banking is complemented by healthcare finance for senior-housing operators, care facilities, hospitals, health systems, physicians, and specialized medical practices. The company also works with tribal nations and governments on financing for healthcare, education, and infrastructure. Its specialist subsidiaries include TransFund, Cavanal Hill Investment Management, BOK Financial Securities, BOK Financial Advisors, BOK Financial Insurance, and BOK Financial Asset Management. The brand is positioned as a regional financial-services institution with national-scale capabilities in selected sectors. It combines local and state-specific banking brands with centralized expertise in commercial finance, energy, healthcare, capital markets, wealth management, and payments. BOK Financial remains listed on the Nasdaq under the symbol BOKF and continues to operate as an active U.S. financial holding company.

BOK Financial's history begins with Exchange National Bank of Tulsa, founded in 1910 to provide capital to a region whose economy was closely connected to oil and other energy activities. The bank established an enduring downtown Tulsa presence. Construction of its original headquarters began in 1917, followed by a 28-story tower completed in 1928. The combined property, now known as the 320 South Boston Building, remained Tulsa's tallest building until 1967 and continued to house a branch of the bank. In 1933 the institution changed its name to National Bank of Tulsa. In 1975 it adopted the Bank of Oklahoma name, reflecting an ambition to serve customers throughout the state rather than only the Tulsa market. The same year it introduced Oklahoma's first automated teller machine. The bank expanded its balance sheet during the following decade, reaching $1 billion in assets in 1979 and acquiring Fidelity of Oklahoma in 1984. The growth period was followed by a major crisis when the Oklahoma energy sector entered a severe downturn. The resulting deterioration in the regional economy threatened the bank's survival. In 1986 the FDIC arranged an unusual rescue rather than allowing the institution to fail. Bank of Oklahoma and Bank of Oklahoma, Tulsa were merged, and preferred shares issued to the FDIC were convertible into a 99.99 percent ownership interest in the combined institution. The intervention was described as an innovative response because the FDIC had only rarely used such a structure to keep a troubled bank operating. On June 7, 1991, George Kaiser, who had previously served on the bank's board, acquired the institution through an FDIC-facilitated sale. The transaction occurred when the company's assets were just under $2 billion; the reported purchase price was $60.7 million. After the acquisition, the institution developed into BOK Financial and pursued a strategy of expanding from Oklahoma into nearby and economically growing markets. It entered Arkansas in 1994 through the acquisition of a bank holding company with operations in northwest Arkansas. In Texas, two bank acquisitions were combined and renamed Bank of Texas in 1997. In 1998, the company purchased 17 New Mexico branches from BankAmerica Corporation and renamed them Bank of Albuquerque. Colorado expansion began in 2003 through the formation of Colorado State Bank, while Arizona entry followed in 2005 through the creation of Bank of Arizona. Missouri was added in 2016 through the acquisition of MBT Bancshares, parent of Missouri Bank and Trust of Kansas City. The company's brand architecture continued to evolve. In 2018, Colorado and Arizona operations were rebranded as BOK Financial, and the acquisition of CoBiz Financial added scale to the Colorado franchise. In October 2019, operations in Arkansas, Kansas, and Missouri also adopted the BOK Financial name. Bank of Oklahoma, Bank of Texas, and Bank of Albuquerque remained important market-facing banking brands within the broader organization. BOK Financial also expanded its nonbank and specialist capabilities. Its businesses include TransFund, an ATM and debit-card processor; Cavanal Hill Investment Management; BOK Financial Securities; BOK Financial Advisors; BOK Financial Insurance; and BOK Financial Asset Management. The company maintains longstanding energy expertise while developing specialist practices in healthcare finance, wealth management, capital markets, and tribal and governmental finance. It has worked with tribal governments and enterprises on healthcare, education, and infrastructure-related financing. In 2005, the company acquired naming rights for Tulsa's BOK Center. In 2025 it was named the official bank partner of Colorado Athletics, reflecting continued activity in the Colorado market.

1. 2025Colorado Athletics banking partnership

   BOK Financial is named the official bank partner of Colorado Athletics.

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2. 2019Additional state operations adopt BOK Financial branding

   Operations in Arkansas, Kansas, and Missouri are rebranded as BOK Financial.

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3. 2018CoBiz Financial acquisition and regional rebranding

   BOK Financial acquires Colorado-based CoBiz Financial and rebrands Colorado and Arizona operations under the BOK Financial name.

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4. 2016Missouri expansion

   The company enters Missouri by acquiring MBT Bancshares, parent of Missouri Bank and Trust of Kansas City.

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5. 2005Arizona entry and BOK Center naming rights

   BOK Financial forms Bank of Arizona and acquires naming rights for Tulsa's BOK Center.

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6. 2003Colorado expansion begins

   The company forms Colorado State Bank as part of its expansion into Colorado.

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7. 1998Bank of Albuquerque is launched

   The company acquires 17 New Mexico branches from BankAmerica Corporation and renames them Bank of Albuquerque.

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8. 1997Bank of Texas is established

   Two Texas bank acquisitions are combined and renamed Bank of Texas.

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9. 1994Expansion into Arkansas

   BOK Financial enters Arkansas through the acquisition of a bank holding company operating in northwest Arkansas.

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10. 1991George Kaiser acquires the institution

    George Kaiser purchases the bank in an FDIC-facilitated transaction dated June 7, 1991.

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11. 1986FDIC-assisted restructuring

    The FDIC supports a merger and recapitalization intended to keep the troubled bank operating during the Oklahoma energy crisis.

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12. 1984Fidelity of Oklahoma is acquired

    The bank purchases Fidelity of Oklahoma and reaches $3 billion in assets.

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13. 1979Assets reach $1 billion

    The bank reaches $1 billion in assets during its expansion before the later Oklahoma energy downturn.

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14. 1975Bank of Oklahoma identity is introduced

    The bank changes its name to Bank of Oklahoma and installs the first automated teller machine in Oklahoma.

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15. 1933Bank becomes National Bank of Tulsa

    The institution adopts the National Bank of Tulsa name.

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16. 1928Downtown Tulsa tower is completed

    A 28-story tower is built adjacent to the earlier headquarters, creating the structure now known as the 320 South Boston Building.

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17. 1917Tulsa headquarters construction begins

    Exchange National Bank begins construction of a headquarters at Third Street and Boston Avenue in Tulsa.

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18. 1910Exchange National Bank of Tulsa is founded

    The institution that became BOK Financial begins operations as a Tulsa bank serving a regional economy with significant energy-related capital needs.

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A diversified regional financial-services provider combining community and commercial banking relationships with specialized expertise in energy, healthcare, tribal finance, wealth management, capital markets, and payments.

• Bank of OklahomaRetail and commercial banking1975

  The flagship Oklahoma banking brand provides consumer deposit and lending products alongside commercial banking, treasury management, corporate finance, and wealth-related services. It represents the company's original statewide banking franchise and retains the strongest connection to BOK Financial's Tulsa roots.

• Bank of TexasCommercial and retail banking1997

  Bank of Texas is the group's Texas-facing banking brand, created by combining two acquired Texas banks in 1997. It serves businesses and individuals with banking, lending, cash-management, and related financial services within BOK Financial's regional network.

• Bank of AlbuquerqueRetail and commercial banking1998

  Bank of Albuquerque was created from 17 New Mexico branches acquired from BankAmerica Corporation in 1998. The brand provides local-market banking and commercial financial services as part of BOK Financial's Southwestern footprint.

• Commercial and energy financeSpecialty lending

  BOK Financial has longstanding expertise financing energy-related companies and projects. Its commercial platform also supports middle-market and corporate borrowers with lending, deposits, treasury services, investment banking, and other capital-markets capabilities.

• Healthcare financeSpecialty finance

  The company provides financial solutions for senior-housing and care-facility owners and operators, hospitals, health systems, physicians, and specialized medical practices. Services can include banking, lending, treasury management, and capital or advisory support.

• Wealth and investment managementWealth management

  Through Cavanal Hill Investment Management, BOK Financial Advisors, BOK Financial Asset Management, and related services, the company offers investment management, financial advice, fiduciary, and asset-management capabilities for individuals, institutions, and governmental clients.

• TransFundPayments and transaction processing

  TransFund is the company's ATM and debit-card processing business. It supports electronic payment and access infrastructure for financial institutions and their customers, complementing BOK Financial's deposit and transaction-banking operations.

• BOK Financial Insurance and SecuritiesFinancial services

  BOK Financial Insurance and BOK Financial Securities extend the group beyond deposit banking into insurance distribution, securities, investment banking, and related capital-markets services for commercial, institutional, and individual clients.

• 2025Colorado Athletics banking partnership

  Colorado

  BOK Financial became the official bank partner of Colorado Athletics, supporting visibility for the brand in a market where it had expanded through organic growth and acquisition.

  Outcome. The partnership was announced in June 2025.

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• 2005BOK Center naming-rights partnership

  Tulsa · Oklahoma

  BOK Financial acquired naming rights for Tulsa's BOK Center, linking the corporate brand with a major local entertainment and civic venue.

  Outcome. The venue continued to operate under the BOK Center name.

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• 2019Consolidate additional state brands under BOK FinancialStrategy

  The company had developed a multi-brand network across several neighboring states.

  What changed. Operations in Arkansas, Kansas, and Missouri were rebranded as BOK Financial.

  Aftermath. The move increased consistency across the company's expanding regional footprint while retaining Bank of Oklahoma, Bank of Texas, and Bank of Albuquerque as important market brands.

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• 2018Acquire CoBiz FinancialM&A

  BOK Financial sought to deepen its Colorado presence and broaden its commercial-banking reach.

  What changed. The company acquired Colorado-based CoBiz Financial, previously associated with Colorado Business Bank.

  Aftermath. The acquisition strengthened the Colorado platform, while Colorado and Arizona operations were rebranded as BOK Financial.

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• 1991George Kaiser acquires Bank of OklahomaM&A

  Following the FDIC-assisted restructuring, the institution was sold while its assets totaled just under $2 billion.

  What changed. George Kaiser acquired the bank in an FDIC-facilitated transaction on June 7, 1991.

  Aftermath. The institution developed into BOK Financial and pursued expansion into neighboring and growing markets.

  Acquisition price. $60.7 million (June 7, 1991)

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• 1986Accept FDIC-assisted restructuring during the Oklahoma energy crisisStrategy

  The collapse of the Oklahoma energy market placed Bank of Oklahoma under severe financial pressure and created a risk of failure.

  What changed. The FDIC supported a merger of Bank of Oklahoma and Bank of Oklahoma, Tulsa and received preferred shares convertible into a 99.99 percent ownership stake in the merged institution.

  Aftermath. The bank remained operating and was later sold to George Kaiser in 1991.

  FDIC rescue cost. $130 million (1986)

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• 2025BOK Financial named official bank partner of Colorado Athletics

  BOK Financial was named the official bank partner of Colorado Athletics, extending the company's institutional and sports-related presence in Colorado.

  Other
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• 2019BOK Financial rebrands Arkansas, Kansas, and Missouri operations

  Operations in Arkansas, Kansas, and Missouri were brought under the BOK Financial identity as part of a broader brand-consolidation effort.

  Other
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• 2018BOK Financial completes CoBiz Financial acquisition

  The company acquired Colorado-based CoBiz Financial, formerly associated with Colorado Business Bank, strengthening its Colorado commercial-banking platform.

  M&A
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1. BOK Financial Corporation
2. BOK Financial Corporation official website