The building served as the headquarters of Torstar and its flagship newspaper, the Toronto Star, from 1971 to 2022.

[citation needed] It was built as a replacement to the Old Toronto Star Building, which was located at 80 King Street West.

The finished newspaper content is sent electronically to the plant where the plates are burnt and the paper is printed and distributed.

[citation needed] The office space at One Yonge Street is leased out to a variety of other companies, including Pinnacle International, the Liquor Control Board of Ontario, Ontario Cannabis Retail Corporation, RL Solutions, Starbucks, Luminus Financial, a dental office, and the downtown Toronto campus of Collège Boréal.

The project includes five skyscrapers on two parcels of land bisected by an eastern extension of Harbour Street.