grew to be one of the largest construction companies in the world . koppers inc. of pittsbugh pa purchased the nello l. teer company and today the aggregate assests are part of lehigh hanson heidelbergcement in north america rail assets are part of csx the road construction aspects are held within the colas group and some of the real estate management aspects were transferred to teer associates . more recently teer companies was formed as a holding company for affiliates in the advertising captive insurance real estate service and venture capital markets.dedicated to the countless employees throughout the years .