Cameco Investor Webcast Advisory

Saskatoon, Saskatchewan, Canada, November 5, 2015

Cameco (TSX: CCO; NYSE: CCJ) will webcast its investor workshop on Monday,
November 23, 2015, beginning at 11:00 a.m. Eastern.

The agenda will include presentations on global uranium marketing, the Cigar Lake mine, McArthur River mine and Key Lake mill, as well as a discussion on global nuclear outlook from guest speaker Duncan Hawthorne, president and CEO of Bruce Power. There will also be a panel discussion and Q&A with members of Cameco’s executive team.

A live webcast will be available on cameco.com by using Windows Media Player or Flash software. For more information, including a detailed agenda, visit the investor workshop page. An archive of the presentations and transcripts will be available on our website after the live event.

Profile

Cameco is one of the world’s largest uranium producers, a significant supplier of conversion services and one of two Candu fuel manufacturers in Canada. Our competitive position is based on our controlling ownership of the world’s largest high-grade reserves and low-cost operations. Our uranium products are used to generate clean electricity in nuclear power plants around the world. We also explore for uranium in the Americas, Australia and Asia. Our shares trade on the Toronto and New York stock exchanges. Our head office is in Saskatoon, Saskatchewan.

Investor inquiries:

Rachelle Girard

(306) 956-6403

Media inquiries:

Rob Gereghty

(306) 956-6190