Colebrook Realty Services Inc. announced the sale of the 326,664-square-foot industrial mill building at 100 Water St. in Holyoke from Hampden Glazed Paper + Card Co. to Green Thumb Industries Inc., a cannabis grower and retailer. Green Thumb Industries (GTI) is a national marijuana producer headquartered in Chicago with various brands and business units to its name. The company, which has 13 manufacturing locations and 97 retail sites across the U.S., is growing its footprint in Holyoke. The company was established in 2014 and boasts more than 2,300 employees. The acquisition of 100 Water St. reflects its continued plans for expansion and the positive environment the city of Holyoke has created for cannabis growers, manufacturers, and retailers.