Notes to Consolidated Financial Statements

For the years ended December 31, 2014 and 2013

34. Subsequent event

On January 21, 2015, Cameco received a Notice of Proposed Assessment (NOPA) from the United States Internal Revenue Service (IRS) pertaining to its 2009 taxation year. A NOPA is used by the IRS to communicate a proposed adjustment to income and is subject to negotiation and change; it is not the final tax assessment. The NOPA provides the basis for the IRS to issue a Revenue Agent Report (RAR), which lists the proposed adjustments and calculates tax and any penalties owing based on the proposed adjustments. We currently anticipate receiving a final RAR in the first quarter of 2015.

The NOPA we received is focused on the transfer pricing used for certain intercompany transactions within our corporate structure. The IRS has proposed that a portion of the non-US income reported under our corporate structure and taxed in non-US jurisdictions should be recognized and taxed in the US. We believe that the conclusions of the IRS in the NOPA are incorrect and are contesting them. We believe that the ultimate resolution of this matter will not be material to our financial position, results of operations and cash flows in the year(s) of resolution.