Park Tower National Bank
| Status: | Inactive as of 12/13/1991 |
| Merger - Without Assistance | |
| Successor Bank: | Heritage Bank |
| Headquarters: | Park Tower National Bank Five Post Oak Park Drive Houston, TX 77227 |
| Established: | 07/01/1983 |
| FDIC Insurance: | 07/01/1983 |
| FDIC Cert: | #24602 |
| Charter Class: | Commercial bank, national (federal) charter and Fed member, supervised by the Office of the Comptroller of the Currency (OCC) |
| Total Assets: | $59,319,000 |
| Total Deposits: | $55,734,000 |
History
| 1983-07-01 | Institution established: Original name:Park Tower National Bank | |
| 1991-12-13 | Merged into and subsequently operated as part of Wharton Bank and Trust Company (1221) in WHARTON, TX | |
| 1991-12-13 | Acquired First State Bank (23478) in CYPRESS, TX | |
| 1991-12-13 | Acquired Cleveland Bank & Trust (3142) in CLEVELAND, TX | |
| 1992-10-26 | Changed name to Heritage Bank (1221) | |
| 2001-02-23 | Changed name to Prosperity Bank (16835) | |
| 2001-02-23 | Merged into and subsequently operated as part of Prosperity Bank (16835) in EL CAMPO, TX | |
| 2002-05-08 | Acquired Texas Guaranty Bank, National Association (25739) in HOUSTON, TX | |
| 2002-07-12 | Acquired The First State Bank (11930) in NEEDVILLE, TX | |
| 2002-09-01 | Acquired Paradigm Bank Texas (23168) in HOUSTON, TX | |
| 2002-11-01 | Acquired First National Bank of Bay City (34448) in BAY CITY, TX | |
| 2003-01-02 | Acquired Bank of the Southwest of Dallas (19258) in DALLAS, TX | |
| 2003-05-06 | Acquired Abrams Centre National Bank (25002) in DALLAS, TX | |
| 2003-06-19 | Acquired BankDallas, SSB (34365) in DALLAS, TX | |
| 2003-11-01 | Acquired MainBank, National Association (26624) in DALLAS, TX | |
| 2003-12-09 | Acquired First State Bank of North Texas (10360) in DALLAS, TX | |
| 2004-08-01 | Acquired Liberty Bank, SSB (32466) in AUSTIN, TX | |
| 2004-08-01 | Acquired Village Bank & Trust, S.S.B. (35147) in LAKEWAY, TX | |
| 2005-03-01 | Acquired FirstCapital Bank, ssb (30448) in CORPUS CHRISTI, TX | |
| 2005-12-01 | Acquired First State Bank, Grapeland, Texas (11910) in GRAPELAND, TX | |
| 2006-04-01 | Acquired Southern National Bank of Texas (25862) in SUGAR LAND, TX | |
| 2007-01-31 | Acquired State Bank (10346) in LA GRANGE, TX | |
| 2007-01-31 | Acquired Gateway National Bank (23803) in DALLAS, TX | |
| 2007-01-31 | Acquired GNB Financial, National Association (3208) in GAINESVILLE, TX | |
| 2007-01-31 | Acquired Northwest Bank (24030) in ROANOKE, TX | |
| 2007-09-01 | Acquired The Bank of Navasota, National Association (24495) in NAVASOTA, TX | |
| 2008-06-01 | Acquired 1st Choice Bank (35048) in HOUSTON, TX | |
| 2008-11-07 | Acquired Franklin Bank, S.S.B. (26870) in HOUSTON, TX as part of a government assisted transaction. | |
| 2012-01-01 | Acquired Bank of Texas (11942) in AUSTIN, TX | |
| 2012-04-01 | Acquired The Bank Arlington (58333) in ARLINGTON, TX | |
| 2012-07-01 | Acquired American State Bank (16701) in LUBBOCK, TX | |
| 2012-10-01 | Acquired Community National Bank (57345) in BELLAIRE, TX | |
| 2013-01-01 | Acquired First Federal Bank Texas (30048) in TYLER, TX | |
| 2013-04-01 | Acquired Coppermark Bank (18957) in OKLAHOMA CITY, OK | |
| 2013-11-01 | Acquired First Victoria National Bank (5570) in VICTORIA, TX | |
| 2014-04-01 | Acquired The F&M Bank & Trust Company (16390) in TULSA, OK | |
| 2016-01-01 | Acquired Tradition Bank - Bellaire (23032) in HOUSTON, TX | |
| 2019-11-01 | Acquired LegacyTexas Bank (58006) in PLANO, TX |