Burnham Holdings Inc Class A
A boiler and heating-equipment maker based in Lancaster, Pennsylvania, Burnham Holdings is the parent company behind well-known HVAC brands like U.S. Boiler Company, making cast-iron and steel boilers that warm homes and businesses across the country. Its roots go back to 1873, when a Buffalo greenhouse builder named Frederick Lord and his son-in-law William Burnham needed dependable heat for the exotic plants of Gilded Age conservatories—so they started casting boilers, a sideline that grew into a home-heating business. The Burnham name lives on both in boilers and in historic greenhouses like the New York Botanical Garden.