COSIA's membership accounts for over 90 per cent of the oil sands product in Canada. COSIA member companies have signed COSIA's Charter and support the Alliance's vision.

These companies, by becoming part of COSIA, share experience and intellectual property with other member companies. Through the sharing of innovation and application of these technologies, members accelerate the pace of environmental performance improvement.

COSIA brings companies together to share innovation and intellectual property related to COSIA's Environmental Priority Areas. Sharing is done in a manner that values and protects corporate technologies, but still provides access for the COSIA companies who can apply and build on these technologies to accelerate environmental performance improvement in their operations.

COSIA brings together leading thinkers from industry, government, academia, aboriginal communities and the wider public to help advance innovation and environmental performance. In addition, organizations and individuals who share COSIA's vision will be able to join COSIA as Associate Members.