Quarterhill Inc. is a Canadian public technology holding company, based in Toronto, Ontario. It was founded in 1992 as a wireless technology company. In the mid-2000s, it gradually transitioned into a patent licensing company. In 2017, it renamed itself Quarterhill, and is attempting to become a holding company specializing in the Internet of Things. It is listed on the Toronto Stock Exchange and was listed on NASDAQ until 2019. Wikipedia