UNITED
STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
FORM 6-K
Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 Under
the Securities Exchange Act of 1934
For the month of December, 2005
Cameco Corporation
(Commission file No. 1-14228)
2121 11th Street West
Saskatoon, Saskatchewan, Canada S7M 1J3
(Address of Principal Executive Offices)
Indicate by check mark whether the registrant files or will file annual reports under cover
Form 20-F or Form 40-F.
Indicate by check mark whether the registrant by furnishing the information contained in this Form
is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the
Securities Exchange Act of 1934.
If Yes is marked, indicate below the file number assigned to the registrant in connection with
Rule 12g3-2(b):
FORM 51-102F3
MATERIAL CHANGE REPORT
Item 1 Name and Address of Company
Cameco Corporation (Cameco)
2121 11th Street West, Saskatoon, Saskatchewan S7M 1J3
Item 2 Date of Material Change
December 6, 2005
Item 3 News Release
The English version and the French translation version of the press release relating to this
material change were distributed and filed by Canadian Corporate News through their Canadian Timely
Disclosure Pack and U.S. Timely Disclosure Pack on December 6, 2005
Item 4 Summary of Material Change
On December 6, 2005, Cameco agreed to sell its entire 6.7% interest in Energy Resources of
Australia Limited (ERA), a uranium producer listed on the Australian Stock Exchange, subject to
customary closing conditions. On December 12, 2005 the sale closed with Cameco receiving net
proceeds (before tax) of $117 million in Australian dollars.
Item 5 Full Description of Material Change
On December 6, 2005, Cameco agreed to sell its entire 6.7% interest in ERA, a uranium producer
listed on the Australian Stock Exchange, subject to customary closing conditions. On December 12,
2005, the sale of Camecos 12.8 million ERA shares closed with Cameco receiving net proceeds
(before tax) of $117 million in Australian dollars. After estimated taxes, Camecos net proceeds
will be approximately $87 million in Canadian dollars, based upon current exchange rates. The
impact on net earnings will be approximately $69 million in Canadian dollars after deducting the
$18 million carrying value of the investment.
The ERA shares which were sold have not been and will not be registered under the US Securities Act
of 1933, as amended, and cannot be offered or sold in the United States to any person absent
registration or an applicable exemption from registration
requirements. The information in this material change report shall not
constitute an offer to sell or the solicitation of an offer to buy securities in any jurisdiction.
Item 6 Reliance on subsection 7.1(2) or (3) of National Instrument 51-102.
Not applicable.
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Item 7 Omitted Information
Not applicable.
Item 8 Executive Officer
Gary M.S. Chad
Senior Vice-President, Governance, Legal and Regulatory Affairs, and Corporate Secretary
Cameco Corporation
(306) 956-6303
Item 9 Date of Report
December 16, 2005
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