Brookfield Properties is making big ripples in the commercial property market. Doing business as Brookfield Office Properties, the company owns stakes in about 100 commercial properties around the world. It primarily invests in properties in large cities including Boston, Houston, Los Angeles, Calgary, Toronto, and Washington, DC. The company's portfolio totals some 70 million sq. ft. and includes most of Manhattan's World Financial Center; Brookfield also has a handful of properties in the development pipeline. Tenants include Merrill Lynch, CIBC, JPMorgan Chase, and Target Corporation. Brookfield plans to spin off its residential property assets to concentrate on expanding its global office portfolio.