Canadian investor Oxford Property Group has won a bidding war to acquire 745 Atlantic Ave., an 11-story, 174,000-square-foot office building near Boston’s South Station, from Beacon Capital Partners of Boston.

The purchase price of $114.5 million works out to $658 per square foot. The current occupancy rate is nearly 100 percent.

The building is one of 14 U.S. properties that Beacon Capital acquired in 2011 from Charter Hall Office, an Australian REIT. Beacon Capital appointed JLL as its leasing agent in 2012 and marketed the building to tech users seeking office space with strong transit connections. Shared office space provider WeWork now occupies a majority of the building. Other tenants include Dain Torpey, Le Ray, Wiest & Garner P.C. and Cambridge Consultants Inc.

Frank Petz and Jessica Hughes of JLL’s Capital Markets Team represented Beacon Capital in the sale.

Toronto-based Oxford Property Group invests on behalf of the Ontario Municipal Employees Retirement System. It has been aggressive in acquisitions of trophy office buildings in Boston, New York and Washington, D.C., including 125 Summer St., 225 Franklin St. and 60 State St. in Boston and One Memorial Drive in Cambridge, which it acquired from Blackstone’s Equity Office last year.