Exclusive: Tishman Speyer plans two more highrise residential towers in SoMa – San Francisco Business TimesTishman Speyer, the developer behind San Francisco’s extravagant Infinity and Lumina condo buildings, is proposing a pair of residential towers a block from the Caltrain station in the South of Market neighborhood. Tishman filed an initial application with Planning Department this month for one of the towers at 655 4th St.,...