Holding company Waste Management tops the heap in the US solid-waste industry. Through subsidiaries, the company serves more than 20 million residential, industrial, municipal, and commercial customers in the US and Canada. Waste Management provides waste collection, transfer, recycling and resource recovery, and disposal services. Its sites include about 249 owned or operated landfills (the industry's largest network), 297 transfer stations, and around 104 material recovery facilities. Collection services account for more than half of sales.