Cameco Increases Ownership Stake in Cigar Lake Mine - Seite 2

Cigar Lake Proven and Probable Mineral Reserves

As of December 31, 2021 (100% basis; tonnes in thousands; pounds in millions)

Proven

Probable

Tonnes

Grade
(% U₃O₈)

Content
(lbs. U₃O₈)

Tonnes

Grade
(% U₃O₈)

Content
(lbs. U₃O₈)

271

15.90

95.0

177.5

14.67

57.4

Cigar Lake Measured, Indicated and Inferred Resources

As of December 31, 2021 (100% basis; tonnes in thousands; pounds in millions)

Measured			Indicated			Inferred
Tonnes	Grade (% U3O8)	Content (lbs. U3O8)	Tonnes	Grade (% U3O8)	Content (lbs. U3O8)	Tonnes	Grade (% U3O8)	Content (lbs. U3O8)
26.8	7.55	4.5	313.3	14.37	99.3	186.4	5.58	22.9

Note: Totals may not add up due to rounding

Please see pages 79 and 80 of Cameco’s March 22, 2022 annual information form for the key assumptions, parameters and methods used to estimate the Cigar Lake mineral reserves and resources.

Qualified Person

The technical and scientific information discussed in this document for Cigar Lake was approved by the following individual who is a qualified person for the purposes of NI 43-101: Lloyd Rowson, general manager, Cigar Lake, Cameco.

Profile

Cameco is one of the largest global providers of the uranium fuel needed to energize a clean-air world. Our competitive position is based on our controlling ownership of the world’s largest high-grade reserves and low-cost operations. Utilities around the world rely on our nuclear fuel products to generate power in safe, reliable, carbon-free nuclear reactors. Our shares trade on the Toronto and New York stock exchanges. Our head office is in Saskatoon, Saskatchewan.