(Reuters) -U.S. regional banks are ramping up mergers, fueled by expectations of a lighter regulatory approach under the Trump administration and the quest for bigger balance sheets that will help compete better against larger lenders amid economic and operational pressures.

On Monday, in the biggest U.S. bank deal this year, Fifth Third Bancorp ( FITB ) agreed to buy regional lender Comerica ( CMA ) in an all-stock deal for $10.9 billion, creating the ninth-largest lender in the country.

Here is an overview of the biggest deals in the space this year:

Target Acquirer Deal Value Date

Announced

Pinnacle Financial ( PNFP ) $8.6 24-Jul

Synovus Partners billion

Financial*

PNC Financial $4.1 8-Sep

FirstBank billion

Columbia Banking $2 billion 23-Apr

Pacific Premier System

Bancorp

Huntington $1.9 14-Jul

Veritex Bancshares billion

Seacoast Banking $710.8 29-May

Villages Corporation of million

Bancorporation Florida

Commerce $585 16-Jun

Finemark Bancshares million

Eastern Bankshares ( EBC ) $490 24-Apr

HarborOne Bancorp million

Dogwood State TowneBank ( TOWN ) $476.2 19-Aug

Bank million

Guaranty Glacier Bancorp ( GBCI ) $476.2 24-Jun

Bancshares million

Southern States FB Financial $381 31-Mar

Bancshares million

Vista Bancshares National Bank $369.1 15-Sep

Holdings million

Westfield Bancorp First Financial $325 23-Jun

Bancorp million

American Bank Prosperity $321.5 18-Jul

Bancshares million

Bank of Idaho Glacier Bancorp ( GBCI ) $245.4 13-Jan

million

ESSA Bancorp CNB Financial $214 10-Jan

million

Provident Bancorp NB Bancorp ( NBBK ) $211.8 5-Jun

million

First IC MetroCity $206 17-Mar

Bankshares million

Old Point TowneBank ( TOWN ) $203 3-Apr

Financial million

* Merger of equals

Source: LSEG, Reuters compilation

(Reporting by Arasu Kannagi Basil, Ateev Bhandari and Pritam Biswas in Bengaluru; Editing by Sriraj Kalluvila)