Capital

Porter Bancorp in Louisville, Ky., has Edmond Seifried to its board. Seifried, 68, is executive director of the Sheshunoff Affiliation Program, which provides education and an idea exchange to community bankers.

While banks have significantly decreased their problem assets from their 2010 peak, sour credits remain much higher than in 2006. A number of banks have been reluctant to sell these assets because of low interest rates and a struggle to find better investments.

Atlantic Capital Bancshares in Atlanta plans to issue $50 million in subordinated debt to finance its acquisition of First Security Group in Tennessee.

The $3.4 billion-asset company plans to use the proceeds for general corporate purposes, possible acquisitions and capital investments in Bridgehampton National Bank.

CircleBack Lending, a Boca Raton, Fla., marketplace lender, has completed a $17.4 million round of equity financing.

PSB Holdings in Putnam, Conn., plans to convert from mutual ownership to a stock-owned bank.

Orchard Platform, which provides services to institutional investors in the marketplace lending industry, has raised $30 million in additional funding.

Bridgewater Bancshares in Bloomington, Minn., has raised $15 million from the private-equity firm Castle Creek Capital.

Summit State Bank in Santa Rosa, Calif., has exited the Small Business Lending Fund.

Pacific Mercantile Bancorp in Costa Mesa, Calif., has reached an agreement to swap about 3 million shares of common stock for all of its outstanding preferred stock and warrants.