Inter-corporate ownership (via odesi)
Search for "inter-corporate ownership".
Produced by Statistics Canada, Inter-corporate ownership is "a unique directory of "who owns what" in Canada. The product covers every individual corporation that is part of a group of commonly controlled corporations with combined assets exceeding 600 million dollars or combined revenue exceeding 200 million dollars. Individual corporations with debt obligations or equity owing to non-residents exceeding a net book value of 1 million dollars are covered as well."