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CCO.TO ·

GLE Appoints President and Chief Commercial Officer

Management Changes

TSX: CCO w e b s i t e : cameco.com

NYSE: CCJ currency: Cdn (unless noted)

2121 – 11th Street West, Saskatoon, Saskatchewan, S7M 1J3 Canada

Tel: 306-956-6200 Fax: 306-956-6201

GLE Appoints President and Chief Commercial Officer

Saskatoon, Saskatchewan, Canada, June 14, 2021 . . . . . . . . . . . . .

Highlights:

 James Dobchuk appointed as the President and Chief Commercial Officer of Global Laser

Enrichment LLC (GLE)

 Formerly Executive Director at Cameco Inc. engaged in key US-based strategy, corporate

development, project management, government and industry relations activities, very well

positioned to support GLE in its next phase of commercialization

 Current Chair of the Nuclear Energy Institute’s Nuclear Fuel Suppliers Committee, a

Secretary of the Board of the Uranium Producers of America, and a member of the Executive

Committee of Radiant Energy Fund, LLC

Silex Systems Limited (Silex) (ASX: SLX; OTCQX: SILXY) and Cameco Corporation (Cameco)

(TSX: CCO; NYSE: CCJ) are pleased to announce the appointment of James Dobchuk as President

and Chief Commercial Officer of GLE, effective June 15, 2021.

James has over 20 years of experience in global uranium marketing and sales, including seven years

as President of Cameco’s US subsidiary, Cameco Inc., leading the company’s international sales and

marketing efforts. Most recently, James served as an Executive Director responsible for supporting

Cameco’s US-focused commercial interests and directing its government affairs activities in

Washington, DC. With his background and extensive experience in the global nuclear fuel markets,

he is well placed to lead the all-important customer-facing element of GLE’s prospective

commercialization phase.

“Following the successful completion of the GLE restructure in January 2021, Silex and Cameco

have focused on recruiting an executive team to lead GLE through its commercialization phase,” said

Craig Roy, Silex Chair and Chair of the GLE Governing Board. “We are delighted to have made the

first of these appointments, with James Dobchuk being selected as GLE’s President and Chief

Commercial Officer.

“James will lead GLE’s commercial and business development activities and will represent GLE with

key government and industry stakeholders. This includes driving GLE’s commercial opportunities,

including the Paducah project, and potentially positioning GLE as a provider of high-assay low-

enriched uranium (HALEU) for the emerging advanced reactor and small modular reactor markets,”

Mr. Roy said.

“We are very pleased to have someone with James’ vast experience and expertise in the nuclear

energy industry step into this important role,” said Cameco President and CEO Tim Gitzel. “He will

bring a strong commercial focus to GLE supported by his lengthy history in sales and marketing,

business development, international commerce and government relations across this sector.

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“GLE is the exclusive licensee of next-generation SILEX laser uranium enrichment technology that

we believe has a bright future,” Mr. Gitzel said. “The ambitious climate commitments being made by

countries and companies around the world confirms that zero-carbon nuclear energy is on an upward

trajectory. Should this technology successfully proceed through development and into

commercialization, we feel we have the right person in place to help it establish a strong foundation

within that growing market.”

“I’m excited to be stepping into this role with GLE, a company leading the development of an

extraordinary technology that I feel is just beginning to scratch the surface of its tremendous

potential,” said James Dobchuk, GLE’s President and Chief Commercial Officer. “I’m proud to be

part of such an innovative, world-class team that is committed to moving this company forward, and

I’m very keen to get to work.”

About Global Laser Enrichment

The successful completion of the GLE restructure occurred on January 31, 2021 following the

conclusion of the US government approval process. The transaction involved the joint purchase of

GE-Hitachi’s (GEH) 76% interest in GLE by Silex and Cameco. Closing of the agreement resulted in

Silex acquiring a 51% interest in GLE and Cameco increasing its share from 24% to 49%, with the

option to attain a majority interest of 75% ownership.

The transaction included a site lease between GLE and GEH, which will enable GLE to complete the

SILEX technology commercialization program at the test loop facility in Wilmington, North

Carolina. This program is expected to culminate with the full-scale demonstration of the SILEX

uranium enrichment technology at the Wilmington site.

The Paducah Uranium Production Project (Paducah project)

Underpinning the Paducah project is the sales agreement between GLE and the US Department of

Energy (DOE), which provides GLE with access to large stockpiles of depleted uranium tails

inventories owned by DOE and located in Paducah, Kentucky. Subject to successful

commercialization of the SILEX technology, the Paducah project represents an ideal path to market.

This opportunity is expected to involve GLE constructing the proposed Paducah Laser Enrichment

Facility (PLEF), utilizing the SILEX technology to enrich the DOE tails inventories, which have been

stored in the form of depleted uranium hexafluoride. The potential for second stage processing of

PLEF output, involving enrichment from natural-grade uranium to low-enriched uranium for today’s

conventional nuclear reactor fleet and an additional stage for production of HALEU fuel for the next-

generation advanced reactor and small modular reactor markets, are currently being assessed.

Silex Profile

Silex is a research and development company whose primary asset is the SILEX laser enrichment

technology, which has been under development for uranium enrichment jointly with its US-based

exclusive licensee, GLE, for a number of years. Development operations continue in Sydney,

Australia and Wilmington, North Carolina at GLE’s Test Loop facility. Silex is also developing its

laser enrichment technology to produce enriched Silicon, a key enabling material for silicon quantum

computers. Silex is headquartered in Sydney, Australia.

Further information on the company’s activities can be found on the Silex website: www.silex.au.

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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.

Caution Regarding Forward-Looking Information and Statements

This news release includes statements considered to be forward-looking information or forward-

looking statements under Canadian and US securities laws (which we refer to as forward-looking

information), including: the appointment of Mr. Dobchuk becoming effective on June 15, 2021; our

expectations that Mr. Dobchuk is well placed to lead the customer-facing element of GLE’s

commercialization phase, the role that he will play, and the focus that he will bring to that role; the

possibility of GLE becoming a provider of high-assay low-enriched uranium (HALEU) for the

emerging advanced reactor and small modular reactor markets; the expectation that GLE will

successfully complete the development of the SILEX technology; our beliefs regarding the future

prospects for next-generation laser enrichment technology and the ability of the technology licensed

by GLE to establish a strong market foundation; and the expectations regarding the Paducah project

and GLE’s ability to commercialize the SILEX technology.

This forward-looking information is based on a number of assumptions, including assumptions

regarding: Mr. Dobchuk’s ability to achieve the objectives of his role; the ability of GLE to complete

the development and commercialization of the SILEX technology; the extent of future market

demand for the SILEX technology, and its ability to compete against any similar or alternative

technology which may be developed; GLE’s ability to become a provider of HALEU for the intended

markets; and GLE’s ability to purchase depleted uranium from the DOE’s stockpiles in Paducah,

Kentucky and to construct the proposed laser enrichment facility using the SILEX technology. This

information is subject to a number of risks, including: the risk that Mr. Dobchuk will face unexpected

impediments in executing his responsibilities; the risk that GLE may not be able to complete the

development of the SILEX technology successfully or, once developed, may not be able to

commercialize it effectively; the risk of a decrease in future market demand for the SILEX

technology; the risk that other similar or alternative technologies may be developed, and may achieve

success in competing with the SILEX technology; the risk that GLE may not be able to become a

provider of HALEU for the intended markets; and the risk that GLE may not be able continue to have

access to the DOE’s depleted uranium stores in Paducah, Kentucky or that the proposed laser

enrichment facility may not be successfully completed. The forward-looking information in this news

release represents our current views, and actual results may differ significantly. Forward-looking

information is designed to help you understand our current views, and may not be appropriate for

other purposes. We will not necessarily update this information unless we are required to by

securities laws.

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Investor inquiries:

Rachelle Girard

306-956-6403

[email protected]

Media inquiries:

Jeff Hryhoriw

306-385-5221

[email protected]