- Allen was born in Vancouver, British Columbia, on March 15, 1948.
- He attended the University of British Columbia, where he studied commerce and was active in student politics.
- After graduating, he worked as an accountant and then as an investment banker.
- In 1970, Allen was part of a group of businessmen who purchased theVancouver Canucks hockey team, which was then playing in the Western Hockey League (WHL).
- He became the team's general manager and president and helped lead the Canucks to their first WHL championship in 1975.
- In 1977, Allen negotiated the sale of the Canucks to theNational Hockey League (NHL), making them the 18th franchise in the league.
- In 1986, Allen founded Canucks Sports & Entertainment, a holding company that owns and operates the Vancouver Canucks, the Vancouver Grizzlies basketball team (now defunct), and various other sports and entertainment properties.
- Allen served as the CEO of CSE until 2010 when he stepped down and became the company's chairman.
- Allen is a prominent political activist. He has supported a variety of political parties, including the Conservative Party of Canada, the Liberal Party of Canada, and the New Democratic Party.
- In 1988, he was appointed to the Canadian Senate as an Independent by then Prime Minister Brian Mulroney.
- He served in the Senate until 2012 when he resigned amid controversy over the Senate expenses scandal.
- In addition to his work with the Canucks and CSE, Allen has also been involved in various other business ventures.
- He is the founder and chairman of Allen Investments, a private investment firm.
- He has also served on the boards of directors of several public companies, including Canadian Pacific Railway, Loblaw Companies, and the Bank of Nova Scotia.
- Allen is a well-known philanthropist and has donated millions of dollars to various charitable causes.
- He has established the Patrick and Anna-Marie Cleland Allen Foundation, which supports a variety of educational and health care initiatives.
- He is also a major supporter of the Vancouver Art Gallery and the University of British Columbia.