Saskatchewan Canada Cameco Reports Document Filings

Saskatoon

Saskatchewan

Canada

Cameco Reports Document Filings

March 19, 2026

Cameco (TSX: CCO; NYSE: CCJ) reported today that it filed its annual report on Form 40-F with the US Securities

and Exchange Commission. The document includes Cameco’s audited annual financial statements for the year

ended December 31, 2025, its management’s discussion and analysis (MD&A), and its Canadian annual

information form (AIF). In addition, Cameco filed with Canadian securities regulatory authorities its AIF. Its audited

annual financial statements for the year ended December 31, 2025, and its MD&A were filed with Canadian

securities regulatory authorities in February 2026. All of these documents are posted on our website.

Shareholders may obtain hard copies of these documents, including the financial statements, free of charge by

contacting:

Cameco Investor Relations

2121 11th Street West

Saskatoon, SK S7M 1J3

Phone: 306-956-6294

On April 2, 2026, Cameco plans to post on its website the management proxy circular that is being distributed to

shareholders of record as of March 9, 2026, for its annual meeting of shareholders on May 7, 2026. Cameco, on

behalf of itself and certain subsidiaries (collectively, “Cameco”), will also post its Modern Slavery Report in

accordance with the Fighting Against Forced Labour and Child Labour in Supply Chains Act (Canada).

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.

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Investor inquiries Media inquiries

Cory Kos Veronica Baker

306-716-6782 306-385-5541

[email protected] [email protected]

www.cameco.com

NEWS RELEASE

All amounts in Canadian dollars

unless specified otherwise