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Cameco reports fourth quarter and 2017 financial results

Financials

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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 reports fourth quarter and 2017 financial results

Saskatoon, Saskatchewan, Canada, February 9, 2018 . . . . . . . . . . . . . . . . .

Cameco (TSX: CCO; NYSE: CCJ) today reported its consolidated financial and operating results for the fourth quarter and

year ended December 31, 2017 in accordance with International Financial Reporting Standards (IFRS).

“Our fourth quarter and annual results are in line with the outlook that we provided in the third quarter,” said president and

CEO, Tim Gitzel. “While the market has struggled to transition, we remain resolved in our efforts to strengthen the company in

the long-term.

“We remain protected under our contract portfolio and have taken the necessary actions to improve our costs. While these

decisions have been difficult, we are starting to see them reflected in our lower capital, operational, and administration spend,

and our cash flow generation.

“We have demonstrated supply discipline over the past couple of years now. We curtailed our Rabbit Lake and US ISR

operations in 2016 and as of January we have temporarily suspended the largest high-grade production source in the world –

our McArthur River/Key Lake operation. Consistent with our strategy, we have taken action to preserve the value of our tier-

one assets while at the same time removing some of the lowest cost production from an oversupplied market. We have done

this at a time where we have inventory and potential opportunity to purchase to fulfill our contractual commitments.

“We will continue to evaluate our strategy in the context of the market and believe that our stakeholders will be rewarded for

their patience and support of our strategy to deliver long-term value.”

Summary of 2017 results and developments:

 2017 performance in line with outlook provided; net loss of $205 million; adjusted net earnings of $59 million: As

expected, production was lower than 2016 due to both planned and unplanned reductions. During the year, we successfully

implemented operational changes at our northern sites, as part of our focus on cost reduction and to improve efficiency.

The operational and administrative changes made in 2017 are reflected in lower capital expenditures, unit cost of sales,

exploration, and administration spend. However, earnings were lower than 2016 primarily due to lower uranium prices.

Lower prices also contributed to the recognition of impairment charges of $358 million in 2017 ($362 million in 2016).

 Average realized price was 66% above spot price: We continue to benefit from the protection of our contract portfolio,

despite removal of the disputed Tokyo Electric Power Company Holdings, Inc. (TEPCO) contract and the sustained low

price environment. Overall the spot price averaged $21.78 (US) in 2017, while our average realized price was $36.13 (US).

We continue to work on protecting and extending the value of our portfolio. In 2017, we extended our contract with Bruce

Power to meet 100% of their requirements to 2030. This extension has an estimated total value of $2 billion to 2030.

 Additional supply curtailment – 2018 suspension of McArthur River/Key Lake, the world’s largest high-grade

production source: After suspending our Rabbit Lake operation and curtailing our US ISR wellfields in 2016, on

November 8, 2017 we announced a temporary suspension of McArthur River and Key Lake commencing at the end of

January 2018. Through the month of January, the McArthur River and Key Lake operations were brought into a safe

shutdown state. Production for 2018 is expected to be negligible. We will continue to review market conditions on an

ongoing basis as we are looking for a sustained improvement to support our restart. 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.

 JV Inkai restructure completed: As announced on December 11, 2017, the restructuring of JV Inkai took effect on

January 1, 2018. The restructure includes an amendment to the resource use contract resulting in the right to increase

production to 10.4 million pounds per year (our share 4.2 million pounds), a licence extension to 2045, and changes to the

boundaries to match the agreed production profile to 2045. Under the implementation agreement, our ownership interest in

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JV Inkai has been adjusted to 40% and Kazatomprom’s to 60% as of January 1, 2018. As a result, we will account for JV

Inkai on an equity basis.

 Reduction to planned dividend and change to annual payment: In the ongoing low price environment, we continue to

evaluate the optimal capital allocation. On November 8, 2017, we announced the reduction in our planned dividend to $0.08

per share and amendment of the payment frequency to annual as part of our continued focus on maintaining our

investment-grade rating and self-managing risk. Ultimately, we hope to reward our stakeholders for their continued patience

and support of our strategy to build long-term value.

 Canada Revenue Agency (CRA) dispute, awaiting trial decision: The trial for 2003, 2005 and 2006 was concluded in

September 2017. We remain confident in our position and await a decision from the judge. We had stated that we expect

the decision could take six to 18 months, from the conclusion of the trial.

 TEPCO dispute, arbitration schedule set: We expect arbitration to begin in the first quarter of 2019. The timing for a final

decision will be dependent on how long the arbitrators deliberate following the conclusion of the hearing. We have filed our

statement of claim for $682 million (US) plus interest and legal costs.

THREE MONTHS ENDED YEAR ENDED

HIGHLIGHTS DECEMBER 31 DECEMBER 31

($ MILLIONS EXCEPT WHERE INDICATED) 2017 2016 2017 2016

Revenue 809 887 2,157 2,431

Gross profit 237 157 436 463

Net loss attributable to equity holders (62) (144) (205) (62)

$ per common share (diluted) (0.16) (0.36) (0.52) (0.16)

Adjusted net earnings (non-IFRS, see page 3) 181 90 59 143

$ per common share (adjusted and diluted) 0.46 0.23 0.15 0.36

Cash provided by operations (after working capital changes) 320 255 596 312

The 2017 annual financial statements have been audited; however, the 2016 fourth quarter and 2017 fourth quarter financial

information presented is unaudited. You can find a copy of our 2017 annual MD&A and our 2017 audited financial statements

on our website at cameco.com.

CHANGES IN EARNINGS

($ MILLIONS) IFRS ADJUSTED

Net earnings (losses) - 2016 (62) 143

Change in gross profit by segment

(we calculate gross profit by deducting from revenue the cost of products and services sold, and depreciation and amortization (D&A), net of hedging benefits)

Uranium Higher sales volume 29 29

Lower realized prices ($US) (222) (222)

Foreign exchange impact on realized prices (36) (36)

Lower costs 180 180

change – uranium (49) (49)

Fuel services Lower sales volume (5) (5)

Higher realized prices ($Cdn) 21 21

Higher costs (15) (15)

change – fuel services 1 1

NUKEM Gross profit 14 20

change – NUKEM 14 20

Other changes

Lower administration expenditures 44 44

Lower (higher) impairment charges 4 -

Lower exploration expenditures 13 13

Change in Rabbit Lake reclamation provision (34) -

Lower loss on disposal of assets 16 16

Change in gains or losses on derivatives 22 44

Change in foreign exchange gains or losses (17) (17)

Gain on customer contract settlements in 2016 (59) (59)

Change in income tax recovery or expense (91) (90)

Other (7) (7)

Net earnings (losses) - 2017 (205) 59

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Non-IFRS measures

ADJUSTED NET EARNINGS

Adjusted net earnings is a measure that does not have a standardized meaning or a consistent basis of calculation under IFRS

(non-IFRS measure). We use this measure as a more meaningful way to compare our financial performance from period to

period. We believe that, in addition to conventional measures prepared in accordance with IFRS, certain investors use this

information to evaluate our performance. Adjusted net earnings is our net earnings attributable to equity holders, adjusted to

better reflect the underlying financial performance for the reporting period. The adjusted earnings measure reflects the

matching of the net benefits of our hedging program with the inflows of foreign currencies in the applicable reporting period,

and is adjusted for NUKEM purchase price inventory recovery, impairment charges, Rabbit Lake reclamation provision

adjustment, and income taxes on adjustments.

Adjusted net earnings is non-standard supplemental information and should not be considered in isolation or as a substitute

for financial information prepared according to accounting standards. Other companies may calculate this measure differently,

so you may not be able to make a direct comparison to similar measures presented by other companies.

To facilitate a better understanding of these measures, the table below reconciles adjusted net earnings with our net earnings

for the three months and years ended December 31, 2017 and 2016.

THREE MONTHS ENDED YEAR ENDED

DECEMBER 31 DECEMBER 31

($ MILLIONS) 2017 2016 2017 2016

Net loss attributable to equity holders (62) (144) (205) (62)

Adjustments

Adjustments on derivatives (2) 23 (108) (130)

NUKEM purchase price inventory recovery - - - (6)

Impairment charges 247 238 358 362

Rabbit Lake reclamation provision 15 (28) - (34)

Income taxes on adjustments (17) 1 14 13

Adjusted net earnings 181 90 59 143

Selected segmented highlights

THREE MONTHS ENDED YEAR ENDED

DECEMBER 31 DECEMBER 31

HIGHLIGHTS 2017 2016 CHANGE 2017 2016 CHANGE

Uranium Production volume (million lbs) 6.9 7.1 (3)% 23.8 27.0 (12)%

Sales volume (million lbs) 1 12.6 11.7 8% 33.6 31.5 7%

Average realized price ($US/lb) 39.44 38.04 4% 36.13 41.12 (12)%

($Cdn/lb) 50.04 50.51 (1)% 46.80 54.46 (14)%

Revenue ($ millions) 1 631 589 7% 1,574 1,718 (8)%

Gross profit ($ millions) 216 143 51% 395 444 (11)%

Fuel services Production volume (million kgU) 2.5 1.9 32% 7.9 8.4 (6)%

Sales volume (million kgU) 1 4.6 4.0 15% 11.5 12.7 (9)%

Average realized price ($Cdn/kgU) 23.13 26.03 (11)% 27.20 25.37 7%

Revenue ($ millions) 1 107 104 3% 313 321 (2)%

Gross profit ($ millions) 22 19 16% 64 63 2%

NUKEM Uranium sales (million lbs)1 4.0 3.1 29% 10.0 7.1 41%

Average realized price ($Cdn/lb) 30.81 46.63 (34)% 32.25 47.90 (33)%

Revenue ($ millions) 1 124 194 (36)% 321 391 (18)%

Gross profit (loss) ($ millions) 2 2 (1) >100% (15) (28) 46%

1 Includes sales and revenue between our uranium, fuel services and NUKEM segments. Please see our annual MD&A for more information.

2 Gross loss includes net inventory write-downs of $9 million in 2017 and $18 million in 2016 due to a decline in the spot price during the year.

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Management's discussion and analysis and financial statements

The 2017 annual MD&A and consolidated financial statements provide a detailed explanation of our operating results for the

three and twelve months ended December 31, 2017, as compared to the same periods last year, and our outlook for 2018.

This news release should be read in conjunction with these documents, as well as our most recent annual information form, all

of which are available on our website at cameco.com, on SEDAR at sedar.com, and on EDGAR at sec.gov/edgar.shtml.

Caution about forward-looking information

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: the statements that we remain protected under our contract portfolio, that we have taken action to

preserve the value of our tier-one assets, the reduction in our planned dividend to $0.08 per share, the extension of the Bruce

Power contract has an estimated total value of $2 billion to 2030, that we expect the decision from the judge in the CRA

dispute could take six to 18 months from the conclusion of the trial in September 2017 and that we expect the TEPCO

arbitration to begin in the first quarter of 2019. Material risks that could lead to a different result include: unexpected changes

in demand for uranium, our production, purchases, costs, our mineral reserve and resource estimates, and government

regulations or policies; the risk of a further reduction in our planned annual dividend; the risks that the term of and

requirements and prices under the Bruce Power contract are less than anticipated; the risk of litigation or arbitration claims

against us that have an adverse outcome; the risk that our contract counterparties may not satisfy their commitments; the risk

that our cost reduction strategies or other strategies are unsuccessful, or have unanticipated consequences; and the risk our

estimates and forecasts prove to be incorrect. In presenting the forward-looking information, we have made material

assumptions which may prove incorrect about: uranium demand; our production, sales and costs; the accuracy of our reserve

and resource estimates; the absence of new and adverse government regulations or policies; that there will be no further

reductions in our planned annual dividend; the successful outcome of any litigation or arbitration claims against us; our ability

to complete contracts on the agreed-upon terms; the term of and requirements and prices under the Bruce Power contract; the

timing of the judge’s decision in the CRA trial and the TEPCO arbitration; and that our cost reduction strategies and other

strategies will successfully achieve their objectives. Please also review the discussion in our 2017 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 our near- and longer-term prospects, and it may not be appropriate for other purposes. We will

not necessarily update this information unless we are required to by securities laws.

Conference call

We invite you to join our fourth quarter conference call on Friday, February 9, 2018 at 11:00 a.m. Eastern.

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. The slides and 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, March 9, 2018, by calling (800) 319-6413 (Canada and US) or (604) 638-9010

(Passcode 1949)

2018 quarterly report release dates

We plan to announce our 2018 quarterly results as follows:

 first quarter consolidated financial and operating results: before markets open on April 27, 2018

 second quarter consolidated financial and operating results: before markets open on July 26, 2018

 third quarter consolidated financial and operating results: before markets open on November 2, 2018

The 2019 date for the announcement of our fourth quarter and 2018 consolidated financial and operating results will be

provided in our 2018 third quarter MD&A. Announcement dates are subject to change.

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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.

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

subsidiaries; including NUKEM Energy GmbH, unless otherwise indicated.

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Investor inquiries: Rachelle Girard (306) 956-6403

Media inquiries: Gord Struthers (306) 956-6593