Bank of Arlington
| Status: | Inactive as of 08/02/1982 |
| Merger - Without Assistance | |
| Successor Bank: | Frontier Bank |
| Headquarters: | Bank of Arlington 525 North Olympic Street Arlington, WA 98223 |
| Established: | 05/01/1967 |
| FDIC Insurance: | 05/01/1967 |
| FDIC Cert: | #19698 |
| Charter Class: | Commercial bank, state charter and Fed member, supervised by the Federal Reserve (FRB) |
History
| 1967-05-01 | Institution established: Original name:Bank of Arlington | |
| 1982-08-02 | Merged into and subsequently operated as part of Frontier Bank (22710) in EVERETT, WA | |
| 1985-01-07 | Change trust powers from TRUST POWERS NOT GRANTED to FULL TRUST POWERS GRANTED | |
| 1989-08-25 | Acquired Citizens Bank of Snohomish County (22789) in MARYSVILLE, WA | |
| 1992-11-13 | Acquired Edmonds National Bank (26298) in EDMONDS, WA | |
| 1993-07-01 | Acquired The Bank of Northshore (25656) in BOTHELL, WA | |
| 1998-12-21 | Acquired Bank of Sumner (22169) in SUMNER, WA | |
| 2000-07-20 | Acquired North Sound Bank (23020) in POULSBO, WA | |
| 2001-02-02 | Acquired Inter Bank (32780) in DUVALL, WA | |
| 2002-10-07 | Changed institution class to INSURED COMMERCIAL OR SAVINGS BANKS, STATE, MEMBERS FRS | |
| 2005-11-10 | Changed institution class to INSURED COMMERCIAL BANKS, STATE, NOT MEMBERS OF THE FRS | |
| 2005-11-10 | Changed primary regulatory agency from FEDERAL RESERVE BOARD to FEDERAL DEPOSIT INSURANCE CORPORATION | |
| 2006-02-01 | Acquired NorthStar Bank (33896) in SEATTLE, WA | |
| 2007-12-01 | Acquired Bank of Salem (33313) in SALEM, OR | |
| 2010-04-30 | Failed. Acquired with government financial assistance and subsequently operated as part of Union Bank, National Association (22826) | |
| 2012-12-03 | Acquired Santa Barbara Bank & Trust, National Association (18169) in SANTA BARBARA, CA | |
| 2014-07-01 | Changed name to MUFG Union Bank, National Association (22826) | |
| 2020-02-21 | Moved bank headquarters from EVERETT, WA to SAN FRANCISCO, CA |