NYMAGIC, a New York-based insurance holding company with property-casualty subsidiaries underwriting ocean marine, inland marine and non-marine liability policies, announced a 10-cent per share quarterly dividend for the fourth quarter.

The dividend, payable April 6, is a 4-cent increase over its third quarter results, the company said.

George Kallop, president and CEO of the company, said in a statement the increase is “a reflection of our excellent performance in 2009 and our continued confidence in the prospects for the growth of the company.”