The Professional Bank
| Status: | Inactive as of 08/02/1997 |
| Merger - Without Assistance | |
| Successor Bank: | Vectra Bank |
| Headquarters: | The Professional Bank 4100 East Mississippi Avenue Denver, CO 80222 |
| Established: | 03/04/1983 |
| FDIC Insurance: | 05/21/1985 |
| FDIC Cert: | #91393 |
| Charter Class: | Commercial bank, state charter and Fed member, supervised by the Federal Reserve (FRB) |
| Total Assets: | $84,896,000 |
| Total Deposits: | $72,729,000 |
History
| 1983-03-04 | Institution established but was not FDIC insured. Original name: Seafirst Belcaro Industrial Bank | |
| 1984-07-18 | Changed name to Prudential Industrial Bank | |
| 1985-05-21 | Changed organization type to COMMERCIAL BANK | |
| 1985-05-21 | Became FDIC insured. | |
| 1985-05-21 | Changed name to Prudential Bank | |
| 1987-04-09 | Acquired Commonwealth Bank (24161) in GLENDALE, CO | |
| 1987-08-27 | Acquired Citizens Bank of Glendale (25329) in DENVER, CO | |
| 1989-02-23 | Changed name to Belcaro Bank | |
| 1993-02-16 | Changed name to The Professional Bank | |
| 1993-02-16 | Acquired Denver Tec Bank (24341) in DENVER, CO | |
| 1993-02-16 | Acquired The Professional Bank of Colorado (26797) in ENGLEWOOD, CO | |
| 1997-08-02 | Merged into and subsequently operated as part of Vectra Bank (22656) in DENVER, CO | |
| 1998-05-28 | Merged into and subsequently operated as part of Vectra Bank Colorado, National Association (2993) in DENVER, CO | |
| 1998-05-29 | Acquired First National Bank of Colorado (25741) in STEAMBOAT SPRINGS, CO | |
| 1998-05-29 | Acquired State Bank and Trust of Colorado Springs (25781) in COLORADO SPRINGS, CO | |
| 1998-08-28 | Acquired Independent Bank (22938) in KERSEY, CO | |
| 1998-08-31 | Acquired Eagle Bank (26405) in BROOMFIELD, CO | |
| 1998-09-11 | Acquired Pitkin County Bank and Trust Company (22909) in ASPEN, CO | |
| 1998-10-30 | Acquired Mountain National Bank (24046) in WOODLAND PARK, CO | |
| 1998-11-30 | Acquired Citizens Bank (20137) in WESTMINSTER, CO | |
| 1998-12-31 | Moved bank headquarters from DENVER, CO to FARMINGTON, NM | |
| 1998-12-31 | Acquired Centennial Bank, National Association (28212) in FARMINGTON, NM | |
| 2001-11-09 | Acquired The Minnequa Bank of Pueblo (1773) in PUEBLO, CO | |
| 2015-12-31 | Acquired Amegy Bank National Association (24107) in HOUSTON, TX | |
| 2015-12-31 | Acquired Nevada State Bank (18113) in LAS VEGAS, NV | |
| 2015-12-31 | Acquired California Bank & Trust (20852) in SAN DIEGO, CA | |
| 2015-12-31 | Acquired Zions Trust, Natioanl Association (57638) in SALT LAKE CITY, UT | |
| 2015-12-31 | Acquired National Bank of Arizona (20626) in TUCSON, AZ | |
| 2015-12-31 | Acquired The Commerce Bank of Washington, National Association (27298) in SEATTLE, WA | |
| 2015-12-31 | Merged into and subsequently operated as part of Zions First National Bank (2270) in SALT LAKE CITY, UT | |
| 2016-01-01 | Changed name to ZB, National Association (2270) | |
| 2018-09-30 | Changed name to Zions Bancorporation, N.A. (2270) |