Founded in 2005, Brennan & Company provides coverage and advisory services to clients in the commercial marine sector, including marine terminals and stevedores, shipyards, marine towing companies, dredging contractors, and marine construction firms. The agency is led by principals Edward Brennan, Austin Denney, and Owen Brennan. Edward Brennan said that joining Patriot enables access to expanded resources through collaboration with other agencies in the Patriot network.