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Saskatchewan Canada Cameco Announces Election of Directors

Saskatoon

Saskatchewan

Canada

Cameco Announces Election of Directors

May 7, 2026

Cameco (TSX: CCO; NYSE: CCJ) has announced the election of nine board members at its annual meeting held

on May 7, 2026.

Shareholders elected board members Tammy Cook-Searson, Catherine Gignac, Tim Gitzel, Marie Inkster, Kathryn

Jackson, Don Kayne, Peter Kukielski, Dominique Minière and Leontine van Leeuwen-Atkins.

Voting Results for Cameco Directors

Nominee Votes For % Votes For Against % Votes Against

Catherine Gignac 72,913,617 98.13% 1,385,967 1.87%

Tammy Cook-Searson 73,976,654 99.57% 322,919 0.43%

Tim Gitzel 74,100,179 99.77% 174,337 0.23%

Marie Inkster 73,781,111 99.33% 494,252 0.67%

Kathryn Jackson 73,302,463 98.69% 972,353 1.31%

Don Kayne 73,311,694 98.81% 882,589 1.19%

Peter Kukielski 74,137,072 99.78% 162,508 0.22%

Dominique Minière 73,460,367 99.35% 480,348 0.65%

Leontine van

Leeuwen-Atkins

73,814,853 99.38% 460,340 0.62%

Profile

Cameco is one of the largest global providers of the uranium fuel needed to power a secure energy future. Our competitive position is based

on our controlling ownership of the world’s largest high-grade reserves and low-cost operations, as well as significant investments across

the nuclear fuel cycle, including ownership interests in Westinghouse Electric Company and Global Laser Enrichment. Utilities around the

world rely on Cameco to provide global nuclear fuel solutions for the generation of safe, reliable, carbon-free nuclear power. Our shares

trade on the Toronto and New York stock exchanges. Our head office is in Saskatoon, Saskatchewan, Canada.

As used in this news release, the terms we, us, our, the Company and Cameco mean Cameco Corporation and its subsidiaries unless

otherwise indicated.

- End –

www.cameco.com

NEWS RELEASE

All amounts in Canadian dollars

unless specified otherwise

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Investor inquiries Media inquiries

Cory Kos Veronica Baker

306-716-6782 306-385-5541

[email protected] [email protected]