The company said it could raise up to $25 million through the initial public offering.
The Alabama company will enter Sarasota, Fla., after buying Premier for $52 million.
The $6 million acquisition will add four businesses with a total of $700 million in assets under management.
Gulfside Bank, which would be based in Sarasota, is angling to become southwest Florida's first new bank in a decade.
Organizers want to open the first new bank in Michigan since 2009, while a third group in Florida has filed a de novo application.
Park National, which came to regret its acquisition of a Florida bank just before the financial crisis, took more than a year to vet NewDominion before making an offer.
The company's planned purchase of Coastway Bancorp in Rhode Island makes sense since both institutions used to be credit unions.
Organizers in Winston-Salem are planning to raise at least $25 million to form Community Bank of the Carolinas.
The company has agreed to buy United Community Bancorp. With the $114 million deal it would add five branches in the Cincinnati area.
Limited organic growth opportunities and rising premiums for bigger deals are fueling more sales of banks with $1 billion to $10 billion in assets.
