Fairholme Capital is increasing its stake in the Florida real estate developer St. Joe, six months after its founder was named chairman of the board.

St. Joe disclosed in a regulatory filing Friday that it entered a stockholder deal with its biggest shareholder, Fairholme Funds , and Fairholme Capital, that will allow it to boost its ownership stake to up to 50 percent. Fairholme had been approved to buy up to a 30 percent stake previously.