Clayton H. Riddell, OC (born 1936) is the founder, president and CEO of Paramount Resources, based in Calgary, Alberta.
Riddell graduated with a Bachelor of Science (Honours) in Geology from the University of Manitoba. He also is part owner of the Calgary Flames and high-end Calgary restaurant Catch. With an estimated net worth of $US 2.5 billion (as of March 2011), Riddell was ranked by Forbes as the 12th wealthiest Canadian and 459th in the world.
Riddell was a president of the Canadian Society of Petroleum Geologists and Chair of the Canadian Association of Petroleum Producers.
The Clayton H. Riddell Faculty of Environment, Earth, and Resources at the University of Manitoba is named in his honour. Riddell donated $10 million to create an endowment fund for the faculty. The faculty combines the Department of Environment and Geography, the Department of Geological Sciences and the Natural Resources Institute.
In 2008, he was made an Officer of the Order of Canada for his leadership and philanthropy. In May 2010, Carleton University announced the creation of Canada's first graduate program in political management, made possible by Riddell's donation. Riddell made the largest donation in Carleton's history, making the creation of the program possible.
Also owns Perpetual Energy Inc, Trilogy Energy Trust, and MGM Energy.
Clayton is CEO of both Paramount Resources Ltd. and MGM Energy Corp. As of March 2014, MGM Energy has received a takeover bid from Paramount Resources.
Riddell is the namesake of the new Riddell Library and Learning Centre (RLLC), which was officially opened on Mount Royal University's Lincoln Park campus on September 7, 2017