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Cameco to suspend production from McArthur River and Key Lake operations and reduce its dividend

Mine Development & Operations Corporate Actions

TSX: CCO website: 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

Cameco to suspend production from McArthur River and

Key Lake operations and reduce its dividend

Saskatoon, Saskatchewan, Canada, November 8, 2017 . . . . . . . . . . . . .

Cameco (TSX: CCO; NYSE: CCJ) announced today that due to continued uranium price

weakness, production from the McArthur River mining and Key Lake milling operations in

northern Saskatchewan will be temporarily suspended by the end of January 2018 and that the

company’s annual dividend will be reduced to $0.08 per common share in 2018.

“With the continued state of oversupply in the uranium market and no expectation of change on

the immediate horizon, it does not make economic sense for us to continue producing at

McArthur River and Key Lake when we are holding a large inventory, or paying dividends out

of proportion with our earnings,” said Tim Gitzel, Cameco’s president and CEO. “We regret the

impact these actions will have on our workforce and other stakeholders and are doing what we

can to cushion it while ensuring the long-term sustainability of the company. We believe these

actions will help shield the company from the nearer term risks we face and will benefit all our

stakeholders for their continued patience and support of our strategy to build long-term value.”

As a result of the suspension, the workforce at the operations will be reduced temporarily by

about 845 workers (560 employees and 285 contractors). About 210 workers (160 employees

and 50 contractors) will be retained to maintain the facilities in safe shutdown state.

We expect our share of the costs to maintain both operations during the suspension to range

between $6.5 and $7.5 million per month. However, some of the items affecting these costs

won’t be known until the operations are actually shutdown. More details will be provided in our

fourth quarter results which will be released in February 2018.

Cameco plans to meet its commitments to customers from inventory and other supply sources

during the suspension, which will be reviewed on an ongoing basis until inventory is sufficiently

drawn down or market conditions improve. The duration of the suspension and temporary layoff

is expected to last 10 months.

As we have previously indicated, we will continue to evaluate the optimal mix of our sources of

uranium supply to feed into our contract portfolio, which could see us make further changes to

our inventory position, production profile or purchasing activity.

Cameco will also review its corporate support activities for McArthur River and Key Lake

operations, which may result in temporary workforce reductions at corporate office.

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Uranium prices have fallen by more than 70% since the Fukushima accident in March 2011 and

remain at unsustainably low levels. Cameco has been partially sheltered from the full impact of

weak prices by its portfolio of long-term contracts, but those contracts are running out and it is

necessary to position the company today to generate cash flow if prices do not improve.

Cameco has committed sales volumes of 28 to 30 million pounds in 2018. Using inventory to

help meet contract commitments now allows Cameco to draw down its inventory without

suffering a loss by selling at low market prices. It also avoids the risk of holding excess

inventory valued above market prices on its balance sheet if prices remain low.

This measure is consistent with other actions Cameco has implemented over the past five years

as part of a deliberate and disciplined strategy to strengthen the company in the long term. We

have reduced supply, avoided selling into a weak spot market, resisted locking-in long-term sales

commitments at low prices, and significantly reduced costs.

To decrease costs, we suspended production at the Rabbit Lake operation, stopped development

and curtailed production at our US operations, reduced workforce across all our sites including

head office, changed air commuter services for operations in Saskatchewan, changed shift

schedules at two Saskatchewan sites, and downsized corporate office functions including a

consolidation of our global marketing activities.

As discussed in our third quarter 2017 MD&A, year over year, average unit cost of sales

(including depreciation and amortization) is down 13%, our cash production costs are down

10%, and direct administration costs are down 20%. Planned capital expenditures for 2017 are

expected to be 26% lower than in 2016.

“To date, we have made good progress in reducing costs but unfortunately given the continued

market weakness, more needs to be done,” said Gitzel. “We can’t control the market so our focus

is on positioning the company to weather the continued low uranium prices and have

uncommitted, low-cost supply to deliver into a strengthening market.”

In addition, Cameco’s board of directors has determined that the company’s annual dividend in

2018 will be $0.08 per common share, a reduction of $0.32 per common share on an annual

basis. Further, the board has approved a change in the dividend payment schedule to an annual

payment instead of quarterly. This change does not impact the quarterly dividend, announced on

October 27, 2017, of $0.10 per common share payable on January 15, 2018, to shareholders of

record at the close of business on December 29, 2017.

Cameco is the operator of both McArthur River mine and the Key Lake mill that processes all of

the ore from McArthur River to uranium concentrate. Cameco owns 70% of McArthur River and

83% of Key Lake. AREVA Resources Canada Inc. owns the remainder. Together, the operations

produced 11.1 million pounds of uranium in the first nine months of 2017 (Cameco’s share 7.8

million pounds).

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Conference Call

We invite you to join a conference call on Thursday, November 9, 2017, at 7:00 a.m. Eastern to

discuss these actions.

The call will be open to all investors and the media. To join the call, please dial (800) 319-4610

(Canada and US) or (604) 638-5340. An operator will put your call through. A live webcast of

the conference call will be available from a link at cameco.com. See the link on our home page

on the day of the call.

A recorded version of the proceedings will be available:

 on our website, cameco.com, shortly after the call

 on post view until midnight, Eastern, December 9, 2017, by calling (800) 319-6413

(Canada and US) or (604) 638-9010 (Passcode 1872)

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. 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 and information about our expectations for the future,

which we refer to as forward-looking information. Forward-looking information is based on our

current views, which can change significantly, and actual results and events may be significantly

different from what we currently expect. Examples of forward-looking information in this news

release include: our expectation that production from the McArthur River mining and Key Lake

milling operations in northern Saskatchewan will be temporarily suspended by the end of

January 2018 and that the duration of the suspension and temporary layoff is expected to last 10

months; that the company’s annual dividend in 2018 will be $0.08 per common share; no

expectation of change on the immediate horizon with the continued state of oversupply in the

uranium market; that we expect our share of the costs to maintain both operations during the

suspension to range between $6.5 and $7.5 million per month; positioning Cameco to weather

continued low uranium prices and have uncommitted, low-cost supply to deliver into a

strengthening market; and planned capital expenditures for 2017 are expected to be 26% lower

than in 2016. Material risks that could lead to a different result include: unexpected changes in

demand, supply and the price of uranium, our production, our purchases, our sales, our costs, our

2017 capital expenditures, government regulations, policies or decisions; our expectations related

to monthly care and maintenance costs at the McArthur River mine and Key Lake mill during the

production suspension prove to be inaccurate; operational, regulatory, labour or other issues

impact our McArthur River mine and Key Lake mill production suspension plans and the

resumption of production; market conditions, our financial condition or other factors impact our

McArthur River mine and Key Lake mill production suspension plans or our planned 2018

annual dividend; and the risk our estimates and forecasts prove to be inaccurate. In presenting the

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forward-looking information, we have made material assumptions which may prove incorrect

about: uranium demand, supply and prices; our production, purchases, costs, sales, 2017 capital

expenditures and monthly care and maintenance costs at the McArthur River mine and Key Lake

mill during the production suspension; the absence of operational, regulatory, labour or other

issues impacting the planned suspension of production at the McArthur River mine and Key

Lake mill and the resumption of production; market conditions, our financial condition and other

factors upon which we have based our McArthur River mine and Key Lake mill production

suspension plans and our planned 2018 annual dividend; our plans to position Cameco to

weather continued low uranium prices succeed; and the absence of new and adverse government

regulations, policies or decisions. Please also review the discussion in our quarterly and annual

MD&A and our most recent annual information form for other material risks that could cause

actual results to differ significantly from our current expectations, and other material

assumptions we have made. Forward-looking information is designed to help you understand

management’s current views of these decisions, and it may not be appropriate for other purposes.

We will not necessarily update this information unless required by securities laws.

Qualified Person

The above scientific and technical information related to the McArthur River and Key Lake

mining and milling operations was approved by Les Yesnik, general manager, McArthur

River/Key Lake operations, who is a qualified person for the purpose of National Instrument 43-

101.

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Investor inquiries: Rachelle Girard (306) 956-6403

Media inquiries: Gord Struthers (306) 956-6593