Great-West Lifeco Inc. is a Canadian insurance-centered financial holding company that operates in North America, Europe and Asia through five wholly owned, regionally focused subsidiaries. Many of the companies it has indirect control over are part of its largest subsidiary, The Canada Life Assurance Company; the others are managed by Great-West Lifeco U.S. LLC, a U.S. based subsidiary. Great-West Lifeco is indirectly controlled by Montreal billionaire Paul Desmarais Jr. through his stake in the Power Corporation of Canada, which owns 72% of Great-West Lifeco. The hyphen in the company's name was originally a typesetter's error.

The Canada Life Assurance Company, commonly known as Canada Life (Canada-Vie), is an insurance and financial services company with its headquarters in Winnipeg, Manitoba. The current company is the result of the 2020 amalgamation of The Great-West Life Assurance Company, London Life Insurance Company and The Canada Life Assurance Company, along with their holding companies. The company is a wholly owned subsidiary of Great-West Lifeco.