Cameco Reports Fourth Quarter and 2015 Financial Results

SASKATOON, SASKATCHEWAN--(Marketwired - Feb 5, 2016) -

ALL AMOUNTS ARE STATED IN CDN $ (UNLESS NOTED)

• delivered on annual guidance amid weak market conditions
• solid uranium segment results, record annual revenue and average realized price owing to a weaker Canadian dollar
• record annual uranium production on the back of strong results at Cigar Lake
• write-down of $210 million in the fourth quarter related to our Rabbit Lake operation

Cameco (TSX:CCO) (NYSE:CCJ) today reported its consolidated financial and operating results for the fourth quarter and year ended December 31, 2015 in accordance with International Financial Reporting Standards (IFRS).

"In 2015, the company continued to perform well, in the context of the global challenges our industry faces," said president and CEO, Tim Gitzel. "But despite the challenges, we continued to concentrate on the aspects of our business that are within our control, which has led us to once again deliver on, and in some cases exceed, our annual guidance.

"We are still waiting on a market recovery that was expected to come sooner, but we've learned to put those expectations aside and prepare for whatever comes our way. Looking ahead, our strategy is to continue focusing our capital on tier-one assets, because it's those world-class, low-cost mines that will position us to quickly respond when the market calls for more production. And we believe that the question is not 'if' the market will make that call, but 'when', as we continue to see a bright long-term outlook for the nuclear industry."

The 2015 annual financial statements have been audited; however, the 2014 and 2015 fourth quarter financial information presented is unaudited. You can find a copy of our 2015 annual management's discussion and analysis (MD&A), and our 2015 audited financial statements, on our website at cameco.com.

FULL YEAR

Our net earnings attributable to equity holders (net earnings) in 2015 were $65 million ($0.16 per share diluted) compared to $185 million ($0.47 per share diluted) in 2014, mainly due to:

• greater losses on foreign exchange derivatives due to the weakening of the Canadian dollar
• lower tax recoveries, primarily due to the write-off of our deferred tax asset in the US

partially offset by:

• lower impairment charges ($215 million in 2015; $327 million in 2014)
• higher earnings in our uranium and fuel services segments due to higher average realized prices
• higher earnings in our NUKEM segment as a result of higher volumes and average realized price
• reduction of the provision related to our Canada Revenue Agency (CRA) litigation

In addition, in 2014 there were a number of one-time items that contributed to the higher net earnings in 2014 compared to 2015, including:

• the sale of our interest in Bruce Power Limited Partnership (BPLP) resulting in a $127 million gain in 2014
• a favourable settlement of $66 million in 2014 with respect to a dispute regarding a long-term supply contract with a utility customer

partially offset by:

• payment of an early agreement termination fee of $18 million as a result of the cancellation of our toll conversion agreement with Springfields Fuels Limited (SFL), and $12 million for settlement costs with respect to early redemption of our Series C debentures in 2014
• the write-off of $41 million of assets under construction in 2014 as a result of changes made to the scope of a number of projects

On an adjusted basis, our earnings were $344 million ($0.87 per share diluted) (non-IFRS measure, see page 8) in 2015 compared to $412 million ($1.04 per share diluted) in 2014.
The 17% decrease from 2014 to 2015 resulted from:

• greater losses on foreign exchange derivatives due to the weakening of the Canadian dollar
• lower tax recoveries, primarily due to the write-off of our deferred tax asset in the US

partially offset by:

• higher earnings in our uranium and fuel services segments mainly due to a higher average realized price
• higher earnings from our NUKEM segment mainly due to higher sales volumes and a higher average realized price
• a reduction of the provision related to our CRA litigation

In addition, in 2014 there was a favourable settlement of $66 million with respect to a dispute regarding a long-term supply contract with a utility customer that contributed to the higher adjusted net earnings in 2014 compared to 2015. The impact of the settlement was partially offset by an early termination fee of $18 million incurred as a result of the cancellation of our toll conversion agreement with SFL and settlement costs of $12 million with respect to the early redemption of our Series C debentures in 2014.

FOURTH QUARTER

In the fourth quarter of 2015, our net loss was $10 million ($(0.03) per share diluted), a decrease of $83 million compared to net earnings of $73 million ($0.18 per share diluted) in 2014, mainly due to:

• greater losses on foreign exchange derivatives resulting from the weakening of the Canadian dollar
• lower income tax recovery due to the reduction of our deferred tax asset in the US
• higher impairment charges in 2015 ($210 million in 2015, $131 million in 2014)

partially offset by:

• higher uranium gross profits resulting mainly from a higher average realized price and higher sales volumes
• higher gross profits from our fuel services segment due to a higher average realized price
• lower exploration expenditures
• the reduction of our provision related to the CRA litigation

In addition, in the fourth quarter of 2014 there was a favourable settlement of $37 million with respect to a dispute regarding a long-term supply contract with a utility customer that contributed to the higher net earnings in the fourth quarter of 2014 compared to the same period in 2015. The impact of the settlement was partially offset by the write-off of $41 million of assets under construction as a result of changes made to the scope of a number of projects in the fourth quarter of 2014.
On an adjusted basis, our earnings this quarter were $151 million ($0.38 per share diluted) compared to $205 million ($0.52 per share diluted) (non-IFRS measure, see page 8) in 2014, mainly due to:

• a lower income tax recovery primarily due to the reduction of our deferred tax asset in the US

partially offset by:

• higher uranium gross profits resulting mainly from a higher average realized price and higher sales volumes
• higher gross profits from our fuel services segment mainly due to a higher average realized price
• lower exploration expenditures
• the reduction of our provision related to the CRA litigation

In addition, in the fourth quarter of 2014 there was a favourable settlement of $37 million with respect to a dispute regarding a long-term supply contract with a utility customer that contributed to the higher adjusted net earnings in the fourth quarter of 2014 compared to the same period in 2015.

Impairment charge on producing assets

During the fourth quarter of 2015, we recognized a $210 million impairment charge related to our Rabbit Lake operation. The impairment was due to increased uncertainty around future production sources for the Rabbit Lake mill as a result of the ongoing economic conditions. The amount of the charge was determined as the excess of carrying value over the recoverable amount. The recoverable amount of the mill was determined to be $69 million. See note 9 to the financial statements.

2015 market developments

As has been the case in recent years, a lot happened over the course of 2015, although the general state of the market did not see much change.

Making positive news for nuclear, as usual, was China. Not only did the country continue with its rapid reactor new build program and bring eight reactors online, but Chinese companies also signed agreements with Argentina, Romania and the UK for new reactors, illustrating the country's commitment to nuclear and its intent to become a major international player in the nuclear industry.

Undoubtedly, the biggest headline of 2015 was the long-awaited first reactor restarts in Japan. Sendai units 1 and 2 were the first reactors in Japan to restart since 2013, and it is hoped they are the first of many to come.

New builds in the UK and US continued to be bright spots for the industry, in addition to a number of reactor life extensions approved in Japan, and the US, with utilities now considering additional extensions that could see reactor lives reaching 80 years.

However, these positive developments could not outweigh the more powerful influence of a continued sluggish global economy, geopolitical issues, concerns around growth in China, and flat electricity demand. These more general drivers had help from industry specific factors as well, such as slower new reactor construction, eight reactor shutdowns, the continued high level of inventories held by market participants, and France's policy to reduce nuclear in their energy mix to 50% by 2025 becoming law.

In addition, supply performed relatively well, with only minor disruptions and one curtailment, unlike 2014, which saw six projects tempered or curtailed.

The end result was a market seemingly indifferent to the commotion of events that occurred throughout the year.

CONTRACTING

Market contracting activity was modest. Spot volumes were normal, but long-term contracting was well below historical averages and current consumption levels-about half of current annual reactor consumption estimates, similar to 2014. Long-term contracting is a key factor in the timing of market recovery, and its pace will depend on the respective coverage levels, market views and risk appetite of both buyers and sellers.

JAPAN

The big news in Japan was the restart of Sendai units 1 and 2, which occurred in August and October. In addition, the court injunction against the two Takahama units was overturned in December, 2015, clearing the way for Takahama unit 3 to restart on January 29, 2016, with unit 4 expected to restart later in the first quarter. Ikata unit 3 has also cleared a safety inspection by the Nuclear Regulatory Authority, and four more units are in the final stages of approval. In all, three reactors are now in operation, while 23 remain under evaluation for restart.

Over the long term, Japan's energy policy states that nuclear will make up 20 to 22% of the energy mix in the country. The billions of dollars in investment being made by Japan's utilities suggest a high degree of confidence in reactors coming back online and meeting this target; however, public sentiment towards nuclear in Japan remains somewhat uncertain.

OTHER REGIONS

China's remarkable nuclear growth program remains on track and the UK's plans for new reactor construction continue to move forward. India and South Korea are also among several key regions growing their nuclear generation fleet.

In 2015, growth was tangible as 10 reactors came online-double that of 2014. These included the eight noted in China, one in Russia and one in South Korea. And seven more reactors began construction-six in China and one in the UAE, a formerly non-nuclear country with four reactors now under construction.

But, to round out the picture, eight units shut down. Five of these were in Japan, plus one in Sweden, one in Germany as part of its phase-out plans, and one in the UK-the last Magnox reactor operating in the world. In addition, there were announcements for future shutdowns in the US, where nuclear struggles to remain competitive in deregulated electricity markets and in the context of low natural gas prices.

One event that could have an effect on the future of nuclear in the US and other western countries is the UN Climate Conference COP-21 agreement, finalized in 2015. As a non-GHG emitter, nuclear could play a significant role in achieving climate change prevention goals.

Outlook for 2016

Our strategy is to focus on our tier-one assets and profitably produce at a pace aligned with market signals, while maintaining the ability to respond to conditions as they evolve.

Our outlook for 2016 reflects the expenditures necessary to help us achieve our strategy. We do not provide an outlook for the items in the table that are marked with a dash.

See 2015 Financial results by segment on page 12 for details.

We expect consolidated revenue to decrease up to 5% in 2016, based on currently committed sales volumes, due to a planned decrease in uranium and fuel services sales volumes. If we make additional sales with deliveries in 2016, we would expect our revenue outlook to increase.

We expect administration costs (not including stock-based compensation) to be 5% to 10% higher compared to 2015 due to increased costs related to the northern collaboration agreements and increased project work. In 2016, we are continuing to negotiate new collaboration agreements with northern communities, which could result in additional one-time payments. Due to the uncertainty of the timing for the potential signing of agreements, the cost is not included in our outlook. If agreements are signed and there is an impact on our administrative costs, we will update our outlook.

We expect exploration expenses to be about 15% to 20% higher than they were in 2015 due to increased exploration activity at Cigar Lake.

On an adjusted net earnings basis, we expect a tax recovery of 25% to 30% in 2016 from our uranium, fuel services and NUKEM segments.

Our consolidated tax rate is a blend of the statutory rates applicable to taxable income earned or tax losses incurred in Canada and in our foreign subsidiaries. We have a global customer base and we have established a marketing and trading structure involving foreign subsidiaries, which entered into various intercompany purchase and sale arrangements, as well as uranium purchase and sale agreements with third parties. Cameco and its subsidiaries made reasonable efforts to put arm's-length transfer pricing arrangements in place, and these arrangements expose the parties to the risks and rewards accruing to them under these contracts. The intercompany contract prices are generally comparable to those established in comparable contracts between arm's-length parties entered into at that time.

This year, many of the existing intercompany purchase and sale arrangements in our portfolio expire. We have started to replace these contracts and will continue to put new intercompany arrangements in place, which, as the existing arrangements did, will reflect the market at the time they are signed.

As a result, in 2017, we expect our consolidated tax rate will transition to a modest expense, and trend toward a tax expense of approximately 20% over the next five years. The actual effective tax rate will vary from year-to-year, primarily due to the actual distribution of earnings among jurisdictions and the market conditions at the time transactions occur under both our intercompany and third-party purchase and sale arrangements.

ROYALTIES

We pay royalties on the sale of all uranium extracted at our mines in the province of Saskatchewan. Two types of royalties are paid:

• Basic royalty: calculated as 5% of gross sales of uranium, less the Saskatchewan resource credit of 0.75%.
• Profit royalty: a 10% royalty is charged on profit up to and including $22.70/kg U₃O₈ ($10.30/lb) and a 15% royalty is charged on profit in excess of $22.70/kg U₃O₈. Profit is determined as revenue less certain operating, exploration, reclamation and capital costs. Both exploration and capital costs are deductible at the discretion of the producer.

As a resource corporation in Saskatchewan, we also pay a corporate resource surcharge of 3% of the value of resource sales.

During the period from 2013 to 2015, transitional rules for the new profit royalty regime were applied whereby only 50% of capital costs were deductible. The remaining 50% was accumulated and will now be deductible beginning in 2016. In addition, the capital allowance related to Cigar Lake under the previous system was grandfathered and is also now deductible beginning in 2016. Based on the expected application of transitional and grandfathered capital allowance deductions, we anticipate that only the first tier of the profit royalty (10%) will apply in 2016 and 2017. As capital pools are depleted, we expect to also be subject to the top tier of the profit royalty (15%) in 2018.

CAPITAL SPENDING

We classify capital spending as sustaining, capacity replacement or growth. As a mining company, sustaining capital is the money we spend to keep our facilities running in their present state, which would follow a gradually decreasing production curve, while capacity replacement capital is spent to maintain current production levels at those operations. Growth capital is money we invest to generate incremental production, and for business development.

We expect total capital expenditures for uranium and fuel services to decrease by about 11% in 2016.

Major sustaining, capacity replacement and growth expenditures in 2016 include:

• McArthur River/Key Lake - At McArthur River, the largest projects are the expansion of freeze capacity and mine development. Other projects include site facility and equipment purchases. At Key Lake, work will be done to expand capacity in the solvent extraction and crystallization circuits of the mill.
• US in situ recovery (ISR) - wellfield construction represents the largest portion of our expenditures in the US.
• Rabbit Lake - At Eagle Point, the largest component is mine development, along with mine equipment upgrades and purchases. At the mill, we plan to optimize tailings capacity and work on various mill facility and equipment replacements.
• Cigar Lake - Work to expand freezing capacity makes up the largest portion of capital at the Cigar Lake site. We are also paying our share of the costs to modify and expand the McClean Lake mill.

We previously expected to spend between $350 million and $400 million in 2017. We now expect to spend between $300 million and $350 million in 2017. Due to the continued market uncertainty, we have reduced growth capital to focus on our tier-one properties.

This information regarding currently expected capital expenditures for future periods is forward-looking information, and is based upon the assumptions and subject to the material risks discussed on pages 21 and 22. Our actual capital expenditures for future periods may be significantly different.

REVENUE, CASH FLOW AND EARNINGS SENSITIVITY ANALYSIS

For 2016:

• An increase of $5 (US) per pound in each of the Ux spot price ($34.65 (US) per pound on February 1, 2016) and the Ux long-term price indicator ($44.00 (US) per pound on January 25, 2016) would change revenue by $72 million and net earnings by $56 million. Conversely, a decrease of $5 (US) per pound would decrease revenue by $69 million and net earnings by $54 million.
• A one cent change in the value of the Canadian dollar versus the US dollar would change adjusted net earnings by $8 million and cash flow by $1 million, with a decrease in the value of the Canadian dollar versus the US dollar having a positive impact.

URANIUM SEGMENT OUTLOOK

We expect to produce 30.0 million pounds in 2016 and have commitments under long-term contracts to purchase approximately 9 million pounds.

Based on the contracts we have in place, and not including sales between our segments, we expect to deliver between 30 million and 32 million pounds of U₃O₈ in 2016. We expect the unit cost of sales to be up to 5% higher than in 2015, primarily due to the planned purchases during the year. If we make additional discretionary purchases in 2016 at a cost different than our other sources of supply, then we expect the overall unit cost of sales to be affected.

We expect revenue to be up to 5% lower than in 2015 as a result of an expected decrease in deliveries, not including sales between our segments, partially offset by a higher average realized price.

In our uranium and fuel services segments, our customers choose when in the year to receive deliveries. As a result, our quarterly delivery patterns and, therefore, our sales volumes and revenue can vary significantly as shown below. We expect the quarterly distribution of uranium deliveries in 2016 to be weighted to the second half of the year. However, not all delivery notices have been received to date and the expected delivery pattern could change. Typically, we receive notices six months in advance of the requested delivery date.

PRICE SENSITIVITY ANALYSIS: URANIUM SEGMENT

The following table is not a forecast of prices we expect to receive. The prices we actually realize will be different from the prices shown in the table. It is designed to indicate how the portfolio of long-term contracts we had in place on December 31, 2015 would respond to different spot prices. In other words, we would realize these prices only if the contract portfolio remained the same as it was on December 31, 2015, and none of the assumptions we list below change.

We intend to update this table each quarter in our MD&A to reflect deliveries made and changes to our contract portfolio. As a result, we expect the table to change from quarter to quarter.

The table illustrates the mix of long-term contracts in our December 31, 2015 portfolio, and is consistent with our marketing strategy. It has been updated to reflect deliveries made and contracts entered into up to December 31, 2015.

Our portfolio includes a mix of fixed-price and market-related contracts, which we target at a 40:60 ratio. Those that are fixed at lower prices or have low ceiling prices will yield prices that are lower than current market prices.

Our portfolio is affected by more than just the spot price. We made the following assumptions (which are not forecasts) to create the table:

Sales

• sales volumes on average of 27 million pounds per year, with commitment levels in 2016 through 2018 higher than in 2019 and 2020
• excludes sales between our uranium, fuel services and NUKEM segments

Deliveries

• deliveries include best estimates of requirements contracts and contracts with volume flex provisions

Annual inflation

• is 2% in the US

Prices

• the average long-term price indicator is the same as the average spot price for the entire year (a simplified approach for this purpose only). Since 1996, the long-term price indicator has averaged 19% higher than the spot price. This differential has varied significantly. Assuming the long-term price is at a premium to spot, the prices in the table and graph will be higher.

FUEL SERVICES OUTLOOK

In 2016, we plan to produce 8 million to 9 million kgU, and we expect sales volumes, not including intersegment sales, to be up to 5% lower than in 2015. Overall revenue is expected to increase by up to 5% as lower sales volumes will be more than offset by an increase in the average realized price. We expect the average unit cost of sales (including D&A) to increase by 10% to 15%; therefore, overall gross profit will decrease as a result.

NUKEM OUTLOOK

For 2016, NUKEM expects to deliver between 9 million and 10 million pounds of uranium. Total revenue and unit cost of sales, not including intersegment sales, is expected to increase by 5% to 10% compared to 2015; however, the overall gross profit percentage is expected to be slightly lower than 2015 at 4% to 5%.

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 adjusted for impairment charges, the write-off of assets, NUKEM inventory write-down, gain on interest in BPLP (after tax), 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 years ended 2015 and 2014, and three months ended December 31, 2015 and December 31, 2014.

TRANSFER PRICING DISPUTES

We have been reporting on our transfer pricing disputes with CRA since 2008, when it originated, and with the United States Internal Revenue Service (IRS) since the first quarter of 2015. Below, we discuss the general nature of transfer pricing disputes and, more specifically, the ongoing disputes we have.

Transfer pricing is a complex area of tax law, and it is difficult to predict the outcome of cases like ours. However, tax authorities generally test two things:

• the governance (structure) of the corporate entities involved in the transactions
• the price at which goods and services are sold by one member of a corporate group to another

We have a global customer base and we established a marketing and trading structure involving foreign subsidiaries, including Cameco Europe Limited (CEL), which entered into various intercompany arrangements, including purchase and sale agreements, as well as uranium purchase and sale agreements with third parties. Cameco and its subsidiaries made reasonable efforts to put arm's-length transfer pricing arrangements in place, and these arrangements expose the parties to the risks and rewards accruing to them under these contracts. The intercompany contract prices are generally comparable to those established in comparable contracts between arm's-length parties entered into at that time.

For the years 2003 to 2010, CRA has shifted CEL's income (as recalculated by CRA) back to Canada and applied statutory tax rates, interest and instalment penalties, and, from 2007 to 2009, transfer pricing penalties. There has not yet been a decision regarding a transfer pricing penalty for 2010. The IRS also allocated a portion of CEL's income for the years 2009 through 2012 to the US, resulting in such income being taxed in multiple jurisdictions. Taxes of approximately $320 million for the 2003 - 2015 years have already been paid in a jurisdiction outside Canada and the US. Bilateral international tax treaties contain provisions that generally seek to prevent taxation of the same income in both countries. As such, in connection with these disputes, we are considering our options, including remedies under international tax treaties that would limit double taxation; however, there is a risk that we will not be successful in eliminating all potential double taxation. The expected income adjustments under our tax disputes are represented by the amounts claimed by CRA and IRS and are described below.

CRA dispute

Since 2008, CRA has disputed our corporate structure and the related transfer pricing methodology we used for certain intercompany uranium sale and purchase agreements. To the end of 2014, we received notices of reassessment for our 2003 through 2009 tax returns, and, in the fourth quarter of 2015, we received a notice of reassessment for our 2010 tax year. We have recorded a cumulative tax provision of $50 million (September 30, 2015 - $92 million), where an argument could be made that our transfer price may have fallen outside of an appropriate range of pricing in uranium contracts for the period from 2003 through 2015. We have reduced the provision to reflect management's revised estimate, which takes into account additional contract information. We are confident that we will be successful in our case and continue to believe the ultimate resolution of this matter will not be material to our financial position, results of operations and cash flows in the year(s) of resolution.

For the years 2003 through 2010, CRA issued notices of reassessment for approximately $3.4 billion of additional income for Canadian tax purposes, which would result in a related tax expense of about $1.1 billion. CRA has also issued notices of reassessment for transfer pricing penalties for the years 2007 through 2009 in the amount of $229 million. The Canadian income tax rules include provisions that require larger companies like us to remit or otherwise secure 50% of the cash tax plus related interest and penalties at the time of reassessment. To date, under these provisions, after applying elective deductions, we have paid a net amount of $232 million cash. In addition, we have provided $332 million in letters of credit (LC) to secure 50% of the cash taxes and related interest amounts reassessed in 2015. The amounts paid or secured are shown in the table below.

Using the methodology we believe CRA will continue to apply, and including the $3.4 billion already reassessed, we expect to receive notices of reassessment for a total of approximately $7.0 billion of additional income taxable in Canada for the years 2003 through 2015, which would result in a related tax expense of approximately $2.1 billion. As well, CRA may continue to apply transfer pricing penalties to taxation years subsequent to 2009. As a result, we estimate that cash taxes and transfer pricing penalties for these years would be between $1.65 billion and $1.70 billion. In addition, we estimate there would be interest and instalment penalties applied that would be material to us. While in dispute, we would be responsible for remitting or otherwise providing security for 50% of the cash taxes and transfer pricing penalties (between $825 million and $850 million), plus related interest and instalment penalties assessed, which would be material to us.

Under the Canadian federal and provincial tax rules, the amount required to be paid or secured each year will depend on the amount of income reassessed in that year and the availability of elective deductions and tax loss carryovers. Recently, the CRA decided to disallow the use of any loss carry-backs for any transfer pricing adjustment, starting with the 2008 tax year. This does not impact the anticipated income tax expense for a particular year, but does impact the timing of any required security or payment. As noted above, for the 2010 tax year, as an alternative to paying cash, we used letters of credit to satisfy our obligations related to the reassessed income tax and related interest amounts. We expect to be able to continue to provide security in the form of letters of credit to satisfy these requirements. The estimated amounts summarized in the table below reflect actual amounts paid or secured and estimated future amounts owing based on the actual and expected reassessments for the years 2003 through 2015, and include the expected timing adjustment for the inability to use any loss carry-backs starting in 2008. We will update this table annually to include the estimated impact of reassessments expected for completed years subsequent to 2015.

In light of our view of the likely outcome of the case as described above, we expect to recover the amounts remitted, including the $564 million already paid or otherwise secured to date.

We are expecting the trial for the 2003, 2005 and 2006 reassessments to commence during the week of September 26, 2016, with final arguments in April 2017. If this timing is adhered to, we expect to receive a Tax Court decision within six to 18 months after the trial is complete.

IRS dispute

In the fourth quarter of 2015, we received a Revenue Agents Report (RAR) from the IRS for the tax years 2010 to 2012. Similar to the 2009 RAR received in the first quarter of 2015, the IRS is challenging the transfer pricing used under certain intercompany transactions pertaining to the 2010 to 2012 tax years for certain of our US subsidiaries. The 2009 and 2010 to 2012 RARs list the adjustments proposed by the IRS and calculate the tax and any penalties owing based on the proposed adjustments.

The current position of the IRS is that a portion of the non-US income reported under our corporate structure and taxed in non-US jurisdictions should be recognized and taxed in the US on the basis that:

• the prices received by our US mining subsidiaries for the sale of uranium to CEL are too low
• the compensation earned by Cameco Inc., one of our US subsidiaries, is inadequate

The proposed adjustments result in an increase in taxable income in the US of approximately $419 million (US) and a corresponding increased income tax expense of approximately $122 million (US) for the 2009 through 2012 taxation years, with interest being charged thereon. In addition, the IRS proposed cumulative penalties of approximately $8 million (US) in respect of the adjustment.

We believe that the conclusions of the IRS in the RARs are incorrect and we are contesting them in an administrative appeal, during which we are not required to make any cash payments. Until this matter progresses further, we cannot provide an estimation of the likely timeline for a resolution of the dispute.

We believe that the ultimate resolution of this matter will not be material to our financial position, results of operations and cash flows in the year(s) of resolution.

Overview of disputes

The table below provides an overview of some of the key points with respect to our CRA and IRS tax disputes.

Caution about forward-looking information relating to our CRA and IRS tax dispute

This discussion of our expectations relating to our tax disputes with CRA and IRS and future tax reassessments by CRA and IRS is forward-looking information that is based upon the assumptions and subject to the material risks discussed under the heading Caution about forward-looking information beginning on page 21 and also on the more specific assumptions and risks listed below. Actual outcomes may vary significantly.

Assumptions

• CRA will reassess us for the years 2011 through 2015 using a similar methodology as for the years 2003 through 2010, and the reassessments will be issued on the basis we expect
• we will be able to apply elective deductions and utilize letters of credit to the extent anticipated
• CRA will seek to impose transfer pricing penalties (in a manner consistent with penalties charged in the years 2007 through 2009) in addition to interest charges and instalment penalties
• we will be substantially successful in our dispute with CRA and the cumulative tax provision of $50 million to date will be adequate to satisfy any tax liability resulting from the outcome of the dispute to date
• IRS may propose adjustments for later years subsequent to 2012
• we will be substantially successful in our dispute with IRS

Material risks that could cause actual results to differ materially

• CRA reassesses us for years 2011 through 2015 using a different methodology than for years 2003 through 2010, or we are unable to utilize elective deductions or letters of credit to the extent anticipated, resulting in the required cash payments or security provided to CRA pending the outcome of the dispute being higher than expected
• the time lag for the reassessments for each year is different than we currently expect
• we are unsuccessful and the outcomes of our dispute with CRA and/or IRS result in significantly higher cash taxes, interest charges and penalties than the amount of our cumulative tax provision, which could have a material adverse effect on our liquidity, financial position, results of operations and cash flows
• cash tax payable increases due to unanticipated adjustments by CRA or IRS not related to transfer pricing
• IRS proposes adjustments for years 2013 through 2015 using a different methodology than for 2009 through 2012
• we are unable to effectively eliminate all double taxation

FOURTH QUARTER

Production volumes this quarter were 17% higher compared to the fourth quarter of 2014, mainly as a result of higher production from the rampup of Cigar Lake production, offset by lower production at McArthur River/Key Lake, Rabbit Lake and our US ISR operations. See Our operations starting on page 15 for more information.

Uranium revenues were up 13% due to a 5% increase in sales volumes, which represents normal quarterly variance in our delivery schedule, and an 8% increase in the average realized price.

Average spot and long-term prices decreased, as did our US dollar average realized price due to lower prices under fixed-price contracts, and the mix of market and fixed contracts. However, the effect of foreign exchange resulted in an 8% higher Canadian dollar average realized price than the prior year. In the fourth quarter of 2015, our realized foreign exchange rate was $1.32 compared to $1.12 in the prior year.

Total cost of sales (including D&A) increased by 17% ($429 million compared to $366 million in 2014). This was the result of a 12% increase in the average unit cost of sales and a 5% increase in sales volumes.

The unit cost of sales increased due to an increase in the volume of material purchased throughout the year at prices higher than our average cost of inventory and an increase in the unit production costs related to the addition of higher cost production from Cigar Lake during rampup.

The net effect was a $17 million increase in gross profit for the quarter.

FULL YEAR

Production volumes in 2015 increased by 22% compared to 2014. Lower production at our US ISR operations was more than offset by the rampup of Cigar Lake production. See Our operations starting on page 15 for more information.

Uranium revenues this year were up 5% compared to 2014 due to an increase of 10% in the Canadian dollar average realized price, partially offset by a decrease in sales volumes of 4%. The spot price for uranium averaged $36.55 (US) per pound in 2015, an increase of 10% compared to the 2014 average price of $33.21 (US) per pound; however, our US dollar average realized price was lower mainly due to lower prices under fixed price contracts. The effect of foreign exchange resulted in a higher Canadian dollar average realized price than in the prior year. The realized foreign exchange rate was $1.27 compared to $1.10 in 2014.

Total cost of sales (including D&A) increased by 7% ($1.26 billion compared to $1.18 billion in 2014) due to higher unit cost of sales offset by lower sales volumes. The higher unit cost of sales was mainly the result of an increase in the volume of material purchased at prices higher than our average cost of inventory, and an increase in unit production costs related to the addition of higher costs from Cigar Lake during rampup.

The net effect was a $6 million increase in gross profit for the year.

The following table shows the costs of produced and purchased uranium incurred in the reporting periods (non-IFRS measures, see below). These costs do not include selling costs such as royalties, transportation and commissions, nor do they reflect the impact of opening inventories on our reported cost of sales.

Cash cost per pound, non-cash cost per pound and total cost per pound for produced and purchased uranium presented in the above table are non-IFRS measures. These measures do not have a standardized meaning or a consistent basis of calculation under IFRS. We use these measures in our assessment of the performance of our uranium business. We believe that, in addition to conventional measures prepared in accordance with IFRS, certain investors use this information to evaluate our performance and ability to generate cash flow.

These measures are non-standard supplemental information and should not be considered in isolation or as a substitute for measures of performance prepared according to accounting standards. These measures are not necessarily indicative of operating profit or cash flow from operations as determined under IFRS. Other companies may calculate these measures 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 following table presents a reconciliation of these measures to our unit cost of sales for the years ended 2015 and 2014 and three months ended December 31, 2015 and December 31, 2014 as reported in our financial statements.

FOURTH QUARTER

Total revenue decreased by 21% due to a 39% decrease in sales volumes, partially offset by a 29% increase in average realized price.

The total cost of sales (including D&A) decreased by 28% ($78 million compared to $109 million in the fourth quarter of 2014) mainly due to a 39% decrease in sales volumes, partially offset by an increase of 16% in the average unit cost of sales, primarily as a result of the mix of products sold.

The net effect was a $5 million increase in gross profit.

FULL YEAR

Total revenue increased by 4% due to a 19% increase in the realized price, partially offset by a 12% decrease in sales volumes.

The total cost of products and services sold (including D&A) decreased by 4% compared to 2014 ($258 million compared to $268 million in 2014), as a 12% decrease in sales volumes was partially offset by a 9% increase in the average unit cost of sales (including D&A). When compared to 2014, the average unit cost of sales was 9% higher due to the mix of fuel services products sold.

The net effect was a $23 million increase in gross profit.

FOURTH QUARTER

NUKEM delivered 3.7 million pounds of uranium, an increase of 0.3 million pounds compared to 2014. NUKEM revenues amounted to $192 million compared to $159 million in 2014 due to an increase in volumes delivered.

Gross profit percentage was 3% in the fourth quarter of 2015, compared to 2% in the fourth quarter of 2014.

The net effect was a $3 million increase in gross profit.

FULL YEAR

During 2015, NUKEM delivered 10.7 million pounds of uranium, an increase of 2.6 million pounds compared to the previous year due to an increase in market activity. Revenues from NUKEM amounted to $554 million, 59% higher than in 2014 as a result of higher sales volumes and an increase in the average realized price, mainly due to weakening of the Canadian dollar. Gross profit percentage was 8% for 2015, compared to 6% for 2014.

The net effect was a $20 million increase in gross profit.

Production Outlook

We remain focused on taking advantage of the long-term growth we see coming in our industry, while maintaining the ability to respond to market conditions as they evolve. Our strategy is to focus on our tier-one assets and profitably produce at a pace aligned with market signals in order to increase long-term shareholder value.

We plan to:

• ensure continued safe, reliable, low-cost production from our tier-one assets - McArthur River/Key Lake, Cigar Lake and Inkai
• complete rampup of production at Cigar Lake
• seek to expand production at McArthur River/Key Lake in conjunction with market signals
• manage the rest of our sources of supply in a manner that retains the flexibility to respond to market signals and take advantage of value adding opportunities within our own portfolio and the uranium market
• maintain our low-cost advantage by focusing on execution and operational excellence

MCARTHUR RIVER/KEY LAKE

Production

Production from McArthur River/Key Lake was 19.1 million pounds; our share was 13.3 million pounds. This was 3% lower than our forecast for the year due to unplanned maintenance outages to repair the calciner at Key Lake. Annual production was unchanged from 2014.

Licensing and production capacity

In 2015, the CNSC approved our application to increase McArthur River's licensed annual production to 25 million pounds (100% basis) to allow flexibility to match the approved Key Lake mill capacity. The licence conditions handbooks for these operations now allow both operations to produce up to 25 million pounds (100% basis) per year.

Key Lake extension and McArthur River production expansion

In support of our strategy to maintain the flexibility to respond to market conditions as they evolve, we continue to advance projects that are necessary to sustain and increase production when the market signals that additional production is needed.

The Key Lake mill began operating in 1983 and we continue to upgrade circuits with new technology to simplify operations and improve environmental performance. The extension project involved increasing our tailings capacity and the mill's nominal annual production rate to closely follow production from the McArthur River mine. As part of the mill upgrades, we continue to construct and commission a new calciner circuit, and expect to begin operating with the new calciner in 2016. The existing calciner circuit will remain in place until operational reliability of the new calciner is achieved. The calciner replacement project was planned in a way that temporarily allows us to use either calciner, which will help to mitigate risks to our production rate during the commissioning phase. In order to increase production at Key Lake, we also need to optimize and expand the solvent extraction and crystallization circuits in the mill (projects planned for 2017).

At McArthur River, we must continue to successfully transition into new mine areas through mine development and investment in support infrastructure. We plan to:

• improve our dewatering system and expand our water treatment capacity as required to mitigate capacity losses, should mine development increase background water volumes
• expand the concrete distribution systems and batch plant capacity

New mining areas

New mining zones and increased mine production require increased freeze capacity and ventilation. In 2015, we continued to upgrade our electrical infrastructure on surface as part of our plan to address these future needs. We advanced groundworks to prepare for the next freeze plant, which is scheduled to begin freezing the south end of the orebody (zone 4) in 2017.

We also made changes in shaft 2 to increase air flow, resulting in a 15% to 20% improvement in ventilation capacity. The improved ventilation eliminates the need for a new ventilation shaft to support a higher production rate.

Tailings capacity

We expect to have sufficient tailings capacity to mill all the known McArthur River mineral reserves and resources, should they be converted to reserves, with additional capacity to toll mill ore from other regional deposits.

PLANNING FOR THE FUTURE AT MCARTHUR RIVER/KEY LAKE

Production

We plan to produce 20.0 million pounds in 2016; our share is 14.0 million pounds.

Expansion progress

As previously disclosed in our 2012 Technical Report, we plan to reach an annual capacity of 22 million pounds by 2018. The capital required to do so is shown in our 2016 capital spending plan, and in our outlook for investing activities in 2017 and 2018, beginning on page 6.

As we increase to 22 million pounds per year, we will optimize the capacity of both the Key Lake mill and McArthur River mine with a view to further increasing production to 25 million pounds per year (100% basis), as market conditions improve. Using this approach, we do not expect significant additional growth capital will be required to increase from annual production of 22 million pounds to an annual rate of 25 million pounds. We expect that this paced approach will allow us to extract maximum value from the operation as the market transitions.

Exploration

In 2015, underground drilling further delineated the zone A mineral resources. Underground definition drilling of zone B will be conducted in 2016 and 2017 to provide the information required for engineering work to develop more detailed mining plans.

CIGAR LAKE

Production

Total packaged production from Cigar Lake was 11.3 million pounds U₃O₈; our share was 5.7 million pounds. The operation exceeded our forecast of 10 million pounds (100% basis) as a result of higher productivity and our intention to adjust annual production as necessary, based on our operating experience during rampup.

During the year, we:

• completed commissioning of the equipment required to operate three JBS units at a production scale
• brought on additional slurry haul trucks to ensure a sufficient quantity of ore slurry can be transported to the McClean Lake mill
• completed final commissioning of underground processing circuits and updated our production rampup plan based on commissioning experience
• modified mine and project plans to reflect our decision to exclusively freeze from surface
• declared commercial production

Commercial production

Commercial production signals a transition in the accounting treatment for costs incurred at the mine. Cigar Lake met all of the criteria for commercial production, including cycle time and process specifications, in the second quarter of 2015. Therefore, effective May 1, 2015, we began charging all production costs, including depreciation, to inventory and subsequently recognizing them in cost of sales as the product is sold.

Underground development

As a result of our decision to exclusively use surface freezing going forward, and the resulting change in the mine plan, the bulk of the development and freeze drilling required for mining in 2016 is already complete. We are continuing to plan for future expansion of surface freezing infrastructure in late 2016.

McClean Lake mill update

Additional estimated expenditures of $50 million (100% basis, our share $25 million) are expected to be required at the McClean Lake mill in 2016, primarily to complete upgrades in the tailings neutralization area in support of the continued rampup to full production of 18 million pounds per year.

PLANNING FOR THE FUTURE AT CIGAR LAKE

Production

In 2016, we expect to produce 16.0 million packaged pounds at Cigar Lake; our share is 8.0 million pounds.

In 2016, we also expect to:

• extend the current surface freeze pad and advance planning for freeze plant infrastructure expansion to support future production
• advance underground development according to the new mine plan and backfill drifts no longer required for underground freezing operations
• continue ramping up towards the planned full annual production rate of 18 million pounds (100% basis) in 2017

Exploration

We are planning to conduct delineation drilling from surface to confirm and upgrade resources contained in the western portion of the deposit. Approximately 65,000 metres of diamond drilling is planned over a three-year period, starting in 2016, in order to complete a detailed geological and geotechnical interpretation, a resource estimate, and a technical study for the western portion of the deposit.

Rampup schedule

In 2017, we expect to reach full annual production of 18 million pounds (100% basis, 9 million pounds our share).

The McClean Lake mill's operating licence currently has an annual production limit of 13 million pounds. AREVA has submitted an application to the CNSC to increase the mill's licensed annual production limit; our 2016 and 2017 production outlook for Cigar Lake is therefore subject to AREVA securing the regulatory approvals necessary to increase mill production.

Labour relations

The current collective agreement between AREVA and unionized employees at the McClean Lake operation expires in May 2016. There is risk to our 2016 and 2017 production outlook for Cigar Lake if AREVA is unable to reach an agreement and there is a labour dispute.

INKAI

Production

Total production from Inkai was 5.8 million pounds; our share was 3.4 million pounds. Production was 17% higher than our production in 2014. During 2015, the subsoil use law in Kazakhstan was amended to allow producers to produce within 20% (above or below) their licensed capacity in a year. As a result, Inkai produced 5.8 million pounds in 2015, 11% higher than its licensed capacity. The increase in production was the result of a higher head grade and an increase in wellfield development efficiency compared to 2014.

Project funding

As of December 31, 2015, Inkai had fully repaid the outstanding loan under our agreement to fund its project development costs related to blocks 1 and 2. In 2015, Inkai paid the remaining $0.8 million (US) in interest on the loan and repaid $55 million (US) of principal.

We are currently advancing funds for Inkai's work on block 3 and, as of December 31, 2015, the principal amounted to $148 million (US). Under the loan agreement, Inkai is to repay Cameco from the net sales proceeds from the sale of production from block 3.

Production expansion

In 2012, we entered into a binding memorandum of agreement (2012 MOA) with our joint venture partner, Kazatomprom, setting out a framework to:

• increase Inkai's annual production from blocks 1 and 2 to 10.4 million pounds (our share 5.2 million pounds) and sustain it at that level
• extend the term of Inkai's resource use contract through 2045

Kazatomprom is pursuing a strategic objective to develop uranium processing capacity in Kazakhstan to complement its leading uranium mining operations. Their primary focus is now on uranium refining, which is an intermediate step in the uranium conversion process. A Nuclear Co-operation Agreement between Canada and Kazakhstan is in place, providing the international framework necessary for applying to the two governments for the required licences and permits. We expect to pursue further expansion of production at Inkai at a pace measured to market opportunities. Discussions continue with Kazatomprom.

Block 3 exploration

In 2015, Inkai completed construction of the test leach facility and began pilot production from test wellfields, as well as advancing work on a preliminary appraisal of the mineral potential of block 3 according to Kazakhstan standards.

Block 3 licence extension

The block 3 test leach facility is now operational and state commissioning of the test wellfields was accomplished during 2015. Our application for an extension of the block 3 evaluation period is still pending final approval from the Ministry of Energy of the Republic of Kazakhstan. Inkai continues working on the final appraisal of the mineral potential of block 3 according to Kazakhstan standards. Although a number of extensions of the licence term have been granted by Kazakh regulatory authorities in the past, there is no assurance that a further extension will be granted. Without such extension, there is a risk we could lose our rights to block 3, and a risk we will not be compensated for the funds we advanced to Inkai to fund block 3 activities.

PLANNING FOR THE FUTURE AT INKAI

Production

We expect total production from blocks 1 and 2 to be 5.2 million pounds in 2016; our share is 3.0 million pounds. We expect to maintain production at this level until the potential growth plans are finalized with Kazatomprom.

Block 3 exploration

In 2016, Inkai expects to continue with pilot production from the test leach facility and to continue working on a final appraisal of the mineral potential according to Kazakhstan standards.

RABBIT LAKE

Production

Production this year was unchanged from our 2014 production as a result of planned timing of production stopes, coupled with slightly improved ore grades.

Development and production continued at the Eagle Point mine. At the mill, we continued to improve the efficiency of the mill operation schedule.

Temporary mining restrictions

On December 17, 2015, we announced that underground mining activities at Eagle Point were being restricted due to a rock fall in an inactive area of the mine. As a precautionary measure, non-essential personnel were removed from the mine while the condition of the affected area was evaluated. Mine production was suspended, although milling of previously mined and transported ore continued through to year end.

The assessment determined that repairs were necessary to support the ground in the affected area of the mine. The repairs were completed, along with some further assessment of stability in other areas of the mine. The mine was reopened and normal operations resumed on February 3, 2016.

PLANNING FOR THE FUTURE AT RABBIT LAKE

Production

We expect to produce 3.6 million pounds in 2016. The decrease compared to 2015 is the result of the restriction of mining activities at the end of 2015, which extended into 2016.

Tailings capacity

Under our current licence, we expect to have sufficient tailings capacity to support milling of Eagle Point ore until about late 2017, based upon expected ore tonnage, milling rates and tailings properties.

Our plan for fully utilizing the available tailings capacity of the Rabbit Lake In-Pit Tailings Management facility requires regulatory approval in 2016 for which we have submitted the required applications. With these regulatory approvals and after we complete the necessary work on the existing pit, we expect to then have sufficient tailings capacity to support milling of Eagle Point ore until at least 2021 based upon expected ore tonnage, milling rates, and tailings properties.

Exploration

We plan to continue our underground drilling reserve replacement program in areas of interest north and northeast of the current mine workings in 2016. The drilling will be carried out from underground locations.

Reclamation

As part of our multi-year site-wide reclamation plan, we spent over $0.7 million in 2015 to reclaim facilities that are no longer in use and plan to spend over $0.5 million in 2016.

FUEL SERVICES

2015 UPDATE

Production

Fuel services produced 9.7 million kgU, 16% lower than 2014. This was a result of our decision to decrease production in response to weak market conditions and the termination of our toll milling agreement with SFL in 2014.

Port Hope conversion facility cleanup and modernization (Vision in Motion)

The Vision in Motion project is currently in the feasibility stage and will continue with the CNSC licensing process in 2016, which is required to advance the project.

Labour relations

Approximately 100 unionized employees at Cameco Fuel Manufacturing Inc.'s operations in Port Hope and Cobourg, Ontario accepted a new collective bargaining agreement in the second quarter of 2015. The employees, represented by the United Steelworkers local 14193, agreed to a three-year contract that includes a 7% wage increase over the term of the agreement. The previous contract expired on June 1, 2015.

PLANNING FOR THE FUTURE AT FUEL SERVICES

Production

We have decreased our production target for 2016 to between 8 million and 9 million kgU in response to the continued weak market conditions.

Labour relations

The current collective bargaining agreement for our unionized employees at the Port Hope conversion facility expires on June 30, 2016. We will commence the bargaining process in early 2016.

Regulatory

The current operating licence for the Port Hope conversion facility expires in February 2017. The CNSC relicensing process will take place in 2016.

Qualified persons

The technical and scientific information discussed in this document for our material properties (McArthur River/Key Lake, Cigar Lake and Inkai) was approved by the following individuals who are qualified persons for the purposes of NI 43-101:

MCARTHUR RIVER/KEY LAKE

• Alain G. Mainville, director, mineral resources management, Cameco
• David Bronkhorst, vice-president, mining and technology, Cameco
• Baoyao Tang, technical superintendent, McArthur River, Cameco

CIGAR LAKE

• Alain G. Mainville, director, mineral resources management, Cameco
• Leslie Yesnik, general manager, Cigar Lake, Cameco
• Scott Bishop, manager, technical services, Cameco

INKAI

• Alain G. Mainville, director, mineral resources management, Cameco
• Darryl Clark, general manager, JV Inkai
• Lawrence Reimann, manager, technical services, Cameco Resources
• Bryan Soliz, principal geologist, mineral resources management, Cameco

Caution about forward-looking information

This document includes statements and information about our expectations for the future. When we discuss our strategy, plans, future financial and operating performance, or other things that have not yet taken place, we are making statements considered to be forward-looking information or forward-looking statements under Canadian and United States securities laws. We refer to them in this document as forward-looking information.

Key things to understand about the forward-looking information in this document:

• It typically includes words and phrases about the future, such as: anticipate, believe, estimate, expect, plan, will, intend, goal, target, forecast, project, strategy and outlook (see examples below).
• It represents our current views, and can change significantly.
• It is based on a number of material assumptions, including those we have listed on page 22, which may prove to be incorrect.
• Actual results and events may be significantly different from what we currently expect, due to the risks associated with our business. We list a number of these material risks on pages 21 and 22. We recommend you also review our annual information form, which includes a discussion of other material risks that could cause actual results to differ significantly from our current expectations.
• 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.

Examples of forward-looking information in this document

• our consolidated outlook for the year and the outlook for our uranium, fuel services and NUKEM segments for 2016
• our expectations for future tax payments and rates
• our expectations for future royalty payments
• our expectations for uranium deliveries in 2016
• our price sensitivity analysis for our uranium segment
• our expectations for 2016, 2017 and 2018 capital expenditures
• the discussion of our expectations relating to our transfer pricing disputes including our estimate of the amount and timing of expected cash taxes and transfer pricing penalties
• our future plans and expectations for each of our uranium operating properties and fuel services operating sites

Material risks

• actual sales volumes or market prices for any of our products or services are lower than we expect for any reason, including changes in market prices or loss of market share to a competitor
• we are adversely affected by changes in currency exchange rates, interest rates, royalty rates or tax rates
• our production costs are higher than planned, or necessary supplies are not available, or not available on commercially reasonable terms
• our estimates of production, purchases, costs, decommissioning or reclamation expenses, or our tax expense estimates prove to be inaccurate
• we are unable to enforce our legal rights under our existing agreements, permits or licences
• we are subject to litigation or arbitration that has an adverse outcome, including lack of success in our disputes with tax authorities
• we are unsuccessful in our dispute with CRA and this results in significantly higher cash taxes, interest charges and penalties than the amount of our cumulative tax provision
• we are unable to utilize letters of credit to the extent anticipated in our dispute with CRA
• there are defects in, or challenges to, title to our properties
• our mineral reserve and resource estimates are not reliable, or we face unexpected or challenging geological, hydrological or mining conditions
• we are affected by environmental, safety and regulatory risks, including increased regulatory burdens or delays
• we cannot obtain or maintain necessary permits or approvals from government authorities
• we are affected by political risks
• we are affected by terrorism, sabotage, blockades, civil unrest, social or political activism, accident or a deterioration in political support for, or demand for, nuclear energy
• we are impacted by changes in the regulation or public perception of the safety of nuclear power plants, which adversely affect the construction of new plants, the relicensing of existing plants and the demand for uranium
• there are changes to government regulations or policies that adversely affect us, including tax and trade laws and policies
• our uranium suppliers fail to fulfil delivery commitments
• our McArthur River development, mining or production plans are delayed or do not succeed for any reason
• our Cigar Lake development, mining or production plans are delayed or do not succeed, including as a result of any difficulties with freezing the deposit to meet production targets, or any difficulties with the McClean Lake mill modifications or expansion or milling of Cigar Lake ore
• the production increase approval at McClean Lake is delayed or not obtained or there is a labour dispute at McClean Lake
• we are affected by natural phenomena, including inclement weather, fire, flood and earthquakes
• our operations are disrupted due to problems with our own or our customers' facilities, the unavailability of reagents, equipment, operating parts and supplies critical to production, equipment failure, lack of tailings capacity, labour shortages, labour relations issues (including an inability to renew the collective bargaining agreement with unionized employees at the Port Hope conversion facility), strikes or lockouts, underground floods, cave-ins, ground movements, tailings dam failures, transportation disruptions or accidents, or other development and operating risks

Material assumptions

• our expectations regarding sales and purchase volumes and prices for uranium and fuel services
• our expectations regarding the demand for uranium, the construction of new nuclear power plants and the relicensing of existing nuclear power plants not being more adversely affected than expected by changes in regulation or in the public perception of the safety of nuclear power plants
• our expected production level and production costs
• the assumptions regarding market conditions upon which we have based our capital expenditures expectations
• our expectations regarding spot prices and realized prices for uranium, and other factors discussed under the heading Price sensitivity analysis: uranium segment
• our expectations regarding tax rates and payments, royalty rates, currency exchange rates and interest rates
• our expectations about the outcome of disputes with tax authorities
• we are able to utilize letters of credit to the extent anticipated in our dispute with CRA
• our decommissioning and reclamation expenses
• our mineral reserve and resource estimates, and the assumptions upon which they are based, are reliable
• the geological, hydrological and other conditions at our mines
• our McArthur River development, mining and production plans succeed
• our Cigar Lake development, mining and production plans succeed, and the deposit freezes as planned
• modification and expansion of the McClean Lake mill are completed as planned and the mill is able to process Cigar Lake ore as expected
• the production increase approval at McClean Lake is approved by the regulator and there is no labour dispute at the McClean Lake mill
• our ability to continue to supply our products and services in the expected quantities and at the expected times
• our ability to comply with current and future environmental, safety and other regulatory requirements, and to obtain and maintain required regulatory approvals
• our operations are not significantly disrupted as a result of political instability, nationalization, terrorism, sabotage, blockades, civil unrest, breakdown, natural disasters, governmental or political actions, litigation or arbitration proceedings, the unavailability of reagents, equipment, operating parts and supplies critical to production, labour shortages, labour relations issues (including an ability to renew the collective bargaining agreement with unionized employees at the Port Hope conversion facility), strikes or lockouts, underground floods, cave-ins, ground movements, tailings dam failure, lack of tailings capacity, transportation disruptions or accidents or other development or operating risks

Conference call

We invite you to join our fourth quarter conference call on Monday, February 8, 2016 at 11:00 a.m. Eastern.

The call will be open to all investors and the media. To join the call, please dial (800) 769-8320 (Canada and US) or (416) 340-8530. An operator will put your call through. A live audio feed 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 13, 2016, by calling (800) 408-3053 (Canada and US) or (905) 694-9451 (Passcode 5846753)

2016 quarterly report release dates

We plan to announce our 2016 quarter results as follows:

• first quarter consolidated financial and operating results: before markets open on April 29, 2016
• second quarter consolidated financial and operating results: before markets open on July 28, 2016
• third quarter consolidated financial and operating results: before markets open on November 2, 2016

The 2017 date for the announcement of our fourth quarter and 2016 consolidated financial and operating results will be provided in our 2016 third quarter MD&A. Announcement dates are subject to change.

Additional information

Our 2015 annual management's discussion and analysis, and annual audited financial statements, will be available shortly on our website at cameco.com, on SEDAR at sedar.com and on EDGAR at sec.gov/edgar.shtml. Our 2015 annual information form is expected to be available later in March.

Profile

We are 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. We also explore for uranium in the Americas, Australia and Asia. 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 Corp. and its subsidiaries; including NUKEM Energy GmbH, unless otherwise indicated.

Contact

Investor inquiries:
Rachelle Girard
(306) 956-6403
Media inquiries:
Gord Struthers
(306) 956-6593