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Canadian Oil Sands Files Remaining Annual Disclosure Documents

CALGARY, ALBERTA--(Marketwire - Mar 27, 2013) - Canadian Oil Sands Limited (the "Corporation") (COS.TO) (COSWF) today filed with Canadian securities regulatory authorities the Corporation's 2012 Annual Report and Management Proxy Circular dated March 18, 2013. The Corporation's audited consolidated annual financial statements for the year ended December 31, 2012 and related management's discussion and analysis, as well as its Annual Information Form dated February 21, 2013, were previously filed on February 22, 2013. Copies of the filed documents may be obtained through the Corporation's profile on www.sedar.com, the Corporation's website at www.cdnoilsands.com, or by emailing the Corporation at invest@cdnoilsands.com.

Canadian Oil Sands Limited

Canadian Oil Sands is a pure investment opportunity in light, sweet crude oil. Through our 36.74% interest in the Syncrude project, we offer a solid, robust production stream of fully upgraded crude oil, exposure to future crude oil prices, potential growth through high-quality oil sands leases and an attractive dividend.

For more information about Canadian Oil Sands please visit our web site at www.cdnoilsands.com.

Ticker Symbols

Toronto Stock Exchange: COS