The company agreed to buy PBB Bancorp in Los Angeles just five weeks after completing its last bank acquisition.
The $280 million securitization is also expected to boost capital levels and lower Dime's loan-to-deposit ratio.
The market for initial public offerings was the best since 2014, reflecting a surge in bank stocks and a need to fuel expansion plans.
The planned purchase of Home BanCorp will nearly double the size of First Citizens' branch network in the Sunshine State.
The company has agreed to buy Kansas Bank Corp. and Adams Dairy Bancshares in separate transactions.
Amalgamated's purchase of New Resource Bank is part of a broader strategy to enter more U.S. markets.
A bull market and investor appetite for bank stocks are spurring more mutuals to consider partial conversions.
The company agreed to pay $18 million for Atlantic Bancshares in a deal that will increase its operations along South Carolina's coast.
The company will pay $186 million for First Bank Lubbock in a deal that also includes mortgage unit PrimeWest Mortgage.
The company will also gain branches in northern Alabama when it buys Tennessee Bancshares.