Ontario Chamber of Commerce | 25,833 followers on LinkedIn. The indispensable partner of business | For more than a century, the Ontario Chamber of Commerce (OCC) has been the independent, non-partisan voice of Ontario business. Our mission is to support economic growth in Ontario by defending business priorities at Queen’s Park on behalf of our network’s diverse 60,000 members. From innovative SMEs to established multi-national corporations and industry associations, the OCC is committed to working with our members to improve business competitiveness across all sectors.