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Wheaton Precious Metals Acquires Cobalt Stream from Vale’S Voisey’S BAY MINE

Mergers & Acquisitions Royalties & Streams

FOR IMMEDIATE RELEASE TSX: WPM

June 11, 2018 NYSE: WPM

WHEATON PRECIOUS METALS ACQUIRES COBALT STREAM

FROM VALE’S VOISEY’S BAY MINE

Vancouver, British Columbia – Wheaton Precious Metals™ Corp. (“Wheaton” or the

“Company”) is pleased to announce that it has agreed to acquire from a subsidiary of Vale

S.A. ("Vale") (NYSE:VALE) an amount of finished cobalt equal to a fixed percentage of cobalt

production from the Voisey’s Bay mine (the “Cobalt Stream”). Wheaton will pay Vale upfront

cash consideration of US$390 million upon closing of the Cobalt Stream. In addition,

Wheaton will make ongoing payments of 18% of the Metal Bulletin market price (“cobalt spot

price”) per cobalt pound delivered 1. Also on June 11, 2018, Vale entered into a separate

streaming agreement with Cobalt 27 Capital Corp. ("Cobalt 27”). In total, Wheaton and Cobalt

27 will provide Vale an aggregate of US$690 million in funding for the combined purchase of

cobalt equal to 75% of Voisey's Bay cobalt production effective January 1, 2021.

TRANSACTION HIGHLIGHTS

• Adds to Wheaton’s existing high-quality portfolio

▪ Effective January 1, 2021, Wheaton will be entitled to receive from Vale an amount

of cobalt equal to 42.4% of the Voisey’s Bay mine cobalt production until the

delivery of 31 million pounds of cobalt and an amount of cobalt equal to 21.2% of

cobalt production thereafter for the life of mine.

▪ Voisey’s Bay is one of the lowest -cost, highest -margin nickel mines globally,

ranking in the bottom half of the nickel cost curve.2

▪ Further strengthens Wheaton’s partnership with Vale, one of the largest

diversified mining companies in the world.

• Increases Wheaton’s growth profile and cash flow

▪ Wheaton will be entitled to production starting in 2021, coincident with the

anticipated ramp up in underground production from Voisey’s Bay.

▪ Attributable cobalt production is forecast to average 2. 6 million pounds per year

for the first 10 years and 2.4 million pounds for the life of mine. For context, on a

gold equivalent ounce ( “GEO”) basis, that is the equivalent to approximately 80

thousand GEOs and 75 thousand GEOs per year, respectively.3

▪ Operating cash flow to Wheaton at current cobalt price s is forecast to average

over US$75 million per year for the first 10 years4.

• Diversifies Wheaton’s portfolio with an integral metal for clean energy

▪ Cobalt is primarily used in battery technology, especially in the rapidly expanding

electric vehicles (“EV”) market.

▪ Similar to silver, cobalt is primarily produced as a by-product.

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▪ While most cobalt supply comes from high political risk jurisdictions, Voisey’s Bay

is located in Newfoundland and Labrador, Canada.

"While our focus has been, and always will be on precious metal streaming, we welcomed

the opportunity to invest in another low -cost, long-life asset with a partner of Vale’s calibre.

Wheaton has built a portfolio of streams on high -quality mines, and Voisey’s Bay has both

the quality and the scale to make it an accretive addition to this portfolio,” said Randy

Smallwood, Wheaton’s President and Chief Executive Officer. "We see numerous similarities

between cobalt and silver, as both are primarily produced as by -products and both are

integral to sustainable clean energy and electronics. In addition, given cobalt supply is

concentrated in high political risk jurisdictions, Voisey’s Bay is particularly attractive for cobalt

production as it is located in Canada.”

TRANSACTION TERMS

• Effective January 1, 2021, Wheaton will be entitled to receive from Vale an amount of

cobalt equal to 42.4% of the Voisey’s Bay mine cobalt production until the delivery of

31 million pounds of cobalt.

• Once Wheaton has received 31 million pounds of cobalt, Wheaton will be entitled to

21.2% of cobalt production for the life of mine.

• Wheaton will pay Vale cash consideration of US$390 million upon closing of the

Cobalt Stream.

• Wheaton will make ongoing payments of 18% of the cobalt spot price to Vale per

cobalt pound delivered until the balance of the upfront cash consideration is reduced

to zero.

• When the balance of the upfront cash consideration is reduced to zero, Wheaton will

make ongoing payments of 22% of the cobalt spot price per cobalt pound delivered.

• Payable rates for cobalt in concentrate have generally been fixed at 93.3%

• Wheaton will take physical deliveries of high-quality, finished cobalt by way of

warehouse certificates.

• Cobalt deliveries will be the obligation of Vale but will be guaranteed by Vale

Newfoundland & Labrador Ltd. , the project owner, and Vale S.A. will provide a

financial guarantee.

• The Cobalt Stream includes a completion test on underground operations measured

by the throughput rate.

• The stream area of interest is defined as the area including Voisey's Bay mining lease

plus a 2 kilometre surrounding area of interest so long as any such cobalt is extracted

using the same underground infrastructure as th e planned Reid Brook and Eastern

Deeps deposits.

• Closing of the transaction is expected to occur shortly following announcement and is

subject to the completion of certain corporate matters and customary conditions.

• On June 11, 2018, Vale entered into separate streaming agreements with each of

Wheaton and Cobalt 27 Capital Corp. for an aggregate total upfront consideration of

US$690 million, of which Wheaton will contribute US$390 million for its stream. The

terms of each streaming agreement are substantially similar other than in respect of

the upfront consideration and cobalt stream percentages.

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FINANCING THE TRANSACTION

The initial upfront cash payment of US$390 million will be paid by using amounts drawn from

the Company’s US$2 billion revolving credit facility. At March 31, 2018, the Company had

approximately US$116 million of cash on hand and US$663 million outstanding under the

revolving credit facility . With trailing four -quarter operating cash flow of just under $ 550

million5, the Company believes it has ample capacity to service the additional debt resulting

from this transaction, especially given the low interest rate and flexible nature of the

covenants under the revolving credit facility (minimum net debt to total net worth and

minimum interest coverage tests).

ABOUT THE VOISEY’S BAY MINE

The Voisey’s Bay mine and concentrator is located on the north coast of Labrador,

approximately 1,200 kilometres north of St. John’s, Newfoundland. Production began in 2005

and open pit mining is expected to continue until 2022. There will be a gradual transition from

open pit to underground mining beginning in 2021.

In July 2015 Vale’s Board of Directors sanctioned the development of the underground

deposits at Voisey’s Bay. The mine expansion project will focus on the development of two

separate deposits, Reid Brook and Eastern Deeps. Once in operation, underground m ining

is expected to extend the life of the Voisey’s Bay operation until at least 203 4. At peak

production, the underground mines are expected to produce about 45,000 tonnes per year

of nickel-in-concentrate which will be shipped to Vale’s processing facility in Long Harbour,

Newfoundland for further processing into finished nickel. The mine also produces a copper

concentrate which is shipped to third party smelters but does not contain payable cobalt.

The construction phase of the mine expansion began in 2016 and is expected to be

completed in 2022. This will include the expansion of existing surface infrastructure at

Voisey’s Bay for increased power generation capacity, additional permanent

accommodations, offices, warehousing and maintenance shops. The water and sewage

treatment facilities will also be upgraded.

The development of the underground mines, which is the largest segment of the construction

program, requires the development of declines from surface to access the ore bodies, and

the construction and installation of supporting infrastructure including underground crushing

and conveying, paste / backfill plant, maintenance facilities and underground mine ventilation

systems.

Vale has entered into a development agreement with the Government of Newfoundland and

Labrador in respect of the development and construction of the underground mines, including

commitments as to the timing of completion of those underground mines. In addition, as

Voisey’s Bay is located in an area subject to land claims by both the Innu Nation and the

Nunatsiavut Government, Vale has also entered into impacts and benefits agreements with

both groups.

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Below are Wheaton’s attributable Mineral Reserves and Resources in respect of the Voisey’s

Bay mine.6

Attributable Mineral Reserves and Mineral Resources – Voisey’s Bay, effective as of

December 31, 2017

Tonnage Grade Contained

Category Mt Co % Co Mlbs

Proven 4.6 0.14 13.9

Probable 6.5 0.13 18.7

P&P 11.1 0.13 32.6

Measured - - -

Indicated 2.2 0.04 2.0

M&I 2.2 0.04 2.0

Inferred 3.9 0.10 8.6

ABOUT COBALT

Cobalt derives its name from the Germanic word for goblin, kobold , a reference to cobalt’s

propensity to turn to black powder on smelting . Despite that early name, t oday, cobalt is

known as the hard, lustrous metal whose high energy density, low thermal conductivity, ability

to alloy, and ferromagnetism results in diverse commercial, industrial and military

applications.

The leading use of cobalt is in rechargeable batteries as cobalt significantly improves lithium

ion batteries’ (“LIB”) perform ance by providing stability and prolonging battery life. Battery

chemicals already consume just under half of the world’s cobalt and that percentage is

expected to grow by 57% in 2020 and 73% in 2025 with the broader adoption of electric

vehicles. The EV industry is expected to lead the demand for cobalt-containing LIB as relative

to the traditional lead-acid battery, LIB have higher charge density, power-to-weight ratio and

a longer lifespan.7

The two main global supply risks for cobalt relate to its geographic concentration and its by-

product nature. The top three producing countries account for two-thirds of supply, with

most of the world’s production coming from the African Copper Belt, mainly the Democratic

Republic of Congo (“DRC”). The DRC is the world’s largest producer of mined cobalt with a

55% global share, and the US Geological Survey estimates that half of global in situ

reserves are in the DRC. Similar to silver, the vast majority of cobalt is produced as a by-

product of other base metals. In cobalt’s case, from copper and nickel, and as such, cobalt

production is more tied to the economics of those two metals rather than any tightness in

the cobalt market.

CONFERENCE CALL

A conference call will be held on June 12, 2018 , starting at 11:00 am (Eastern Time) to

discuss this transaction. A presentation on the transaction will be available on the Company’s

website shortly before the conference call. To participate in the live call please use one of the

following methods:

Dial toll free from Canada or the US: 888-231-8191

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Dial from outside Canada or the US: 647-427-7450

Pass code: 7861228

Live audio webcast: www.wheatonpm.com

Participants should dial in ten to fifteen minutes before the call.

The conference call will be recorded and available until June 19, 2018 at 11:59 pm ET. The

webcast will be available for one year. You can listen to an archive of the call by one of the

following methods:

Dial toll free from Canada or the US: 855-859-2056

Dial from outside Canada or the US: 416-849-0833

Pass code: 7861228

Archived audio webcast: www.wheatonpm.com

Mr. Neil Burns, Vice President of Technical Services for Wheaton, is a "qualified person" as

such term is defined under National Instrument 43 -101 and has reviewed and approved the

technical disclosure in this news release including information on Mineral Reserves and

Mineral Resources.

ADVISORS AND COUNSEL

Scotiabank acted as financial advisor and Cassels Brock & Blackwell LLP acted as legal counsel to

Wheaton.

For further information, please contact:

Patrick Drouin

Senior Vice President, Investor Relations

Wheaton Precious Metals Corp.

Tel: 1-844-288-9878

Email: [email protected]

Website: www.wheatonpm.com

End Notes

1) Production payment is set at 18% of cobalt spot prices, increasing to 22% upon the balance of upfront

consideration being reduced to zero.

2) Based on Wood Mackenzie est. of 2nd quarter of 2018 by-product cost curve for nickel mines.

3) Production is defined as metal contained in concentrate and is based on mine plans provided by Vale and a

gold to cobalt ratio based on $1,300 per ounce of gold and $40 per pound of cobalt.

4) Operating cash flow is based on current market cobalt prices of approximately $40 per pound of cobalt, 2.6

million pounds of cobalt produced annually, a payable cobalt rate of 93.3%, production payment of 18%, and an

assumed cobalt marketing fee. Statements as to estimated operating cash flow and EBITDA contain forward

looking information and readers are cautioned that actual outcomes may vary. Please see the “Cautionary Note

Regarding Forward Looking-Statements” at the end of this news release for material risks, assumptions, and

important disclosure associated with this information.

5) Operating cash flow based on Q2, Q3, and Q4 of 2017, and Q1 2018

6) Please refer to the Mineral Reserves & Mineral Resources table at the end of this news release for full

disclosure of reserves and resources associated with Voisey’s Bay including accompanying footnotes.

7) Spender, Reg, Larry Hill, Eric Zaunscherb, Thomas Gallo and John Kratochwil. "Cobalt: Out of the shadows

and into the spotlight" Specialty Minerals and Metals, Global Equity Research, Canaccord Genuity. 25-May-17.

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ATTRIBUTABLE MINERAL RESERVES AND MINERAL RESOURCES FOR VOISEY’S

BAY

Deposit Category Tonnage Grade Contained

Mt Co % Co Mlbs

Main & Mini Ovoid Proven 0.3 0.18 1.3

SE Extension Proven 0.8 0.04 0.7

Reid Brook Proven 1.7 0.15 5.6

Probable 0.9 0.13 2.6

Eastern Deeps Proven 1.8 0.16 6.3

Probable 5.6 0.13 16.2

Total Reserves Proven 4.6 0.14 13.9

Probable 6.5 0.13 18.7

P&P 11.1 0.13 32.6

Discovery Hill Indicated 1.4 0.05 1.5

Inferred 1.4 0.05 1.6

SE Extension Indicated 0.8 0.03 0.5

Reid Brook Inferred 2.5 0.13 7.0

Total Resources Measured - - -

Indicated 2.2 0.04 2.0

M&I 2.2 0.04 2.0

Inferred 3.9 0.10 8.6

Notes on Mineral Reserves and Mineral Resources

• All Mineral Reserves and Mineral Resources have been estimated in accordance with the 2014 Canadian

Institute of Mining, Metallurgy and Petroleum (CIM) Standards for Mineral Resources and Mineral Reserves

and National Instrument 43 -101 – Standards for Disclosure for Mineral Projects (“NI 43 -101”), or the 2012

Australasian Joint Ore Reserves Committee (JORC) Code for Reporting of Exploration Results, Mineral

Resources and Ore Reserves.

• Mineral Reserves and Mineral Resources are reported above in millions of metric tonnes ("Mt"), percent ("%")

and millions of pounds ("Mlbs").

• Qualified persons (“QPs”), as defined by the NI 43 -101, for the Mineral Reserve and Mineral Resou rce

estimates are:

o Neil Burns, M.Sc., P.Geo. (Vice President, Technical Services); and

o Ryan Ulansky, M.A.Sc., P.Eng. (Senior Director, Engineering),

• The Mineral Resources reported in the above tables are exclusive of Mineral Reserves.

• Mineral Resources which are not Mineral Reserves do not have demonstrated economic viability.

• Mineral Reserves and Mineral Resources are reported as of December 31, 2017 based on information

available to the Company as of the date of this document, and therefore will not reflect updates, if any, after

such date.

• Process recovery of cobalt to a nickel concentrate averages 84%.

• Mineral Reserves and Resources are estimated using appropriate process recovery rates and the following

NSR cut-offs and commodity prices:

o Ovoid, Mini Ovoid and SE Extension Mineral Reserves – Cdn $24.04 per tonne assuming $9.07 per

pound nickel, $2.86 per pound copper and $12.25 per pound cobalt;

o Reid Brook Mineral Reserves and Mineral Resources - $275.00 per tonne assuming $9.72 per pound

nickel, $3.40 per pound copper and $11.50 per pound cobalt;

o Eastern Deeps Mineral Reserves - $225.00 per tonne assuming $6.35 per pound nickel, $2.81 per

pound copper and $18.13 per pound cobalt;

o SE Extension Mineral Resources - $24.00 per tonne assuming $10.43 per p ound nickel, $3.45 per

pound copper and $13.00 per pound cobalt; and

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o Discovery Hill Mineral Resources - $24.81 per tonne assuming $9.53 per pound nickel, $3.13 per

pound copper and $12.50 per pound cobalt.

• The Company's attributable Resources and Reserves for Voisey’s Bay have been constrained to the

production expected from January 1, 2021 onwards.

• The Voisey’s Bay cobalt purchase and sale agreement provides that Vale will deliver an amount of finished

cobalt equal to 42.4% of the cobalt production until 3 1 million pounds are delivered and 21.2% of cobalt

production thereafter, for the life of the mine. Attributable reserves and resources have been calculated on

the 42.4% / 21.2% basis.

• Cobalt is produced as a by -product metal; therefore, the economic cut -off applied to the reporting of cobalt

Resources and Reserves will be influenced by changes in the commodity prices of other metals at the time.

• Full Reserve and Resource tables are available on the Company's website, www.wheatonpm.com.

CAUTIONARY NOTE REGARDING FORWARD LOOKING-STATEMENTS

The information contained herein contains “forward -looking statements” within the meaning of the United States

Private Securities Litigation Reform Act of 1995 and “forward-looking information” within the meaning of applicable

Canadian securities legislation. Forward -looking statements, which are all statements other than statements of

historical fact, include, but are not limited to, statements with respect to:

• the payment of the upfront cash consideration of US$390 million to Vale in connection with the Cobalt

Stream;

• the construction timeline, including completion, of the mine expansion, including the underground mines,

at Voisey’s Bay by Vale;

• the commencement and timing of delivery of cobalt by Vale under the Cobalt Stream;

• the receipt of cobalt by Wheaton of cobalt production in respect of Voisey’s Bay;

• Vale’s obligations under the development agreement with the Government of Newfoundland and

Labrador and the impacts and benefits agreements with the Innu Nation a nd the Nunatsiavut

government;

• the demand, uses and supply of cobalt;

• future payments by the Company in accordance with precious metal purchase agreements, including

any acceleration of payments, estimated throughput and exploration potential;

• projected increases to Wheaton’s production and cash flow profile;

• the expansion and exploration potential at the Salobo and Peñasquito mines;

• projected changes to Wheaton’s production mix;

• anticipated increases in total throughput;

• the estimated future production;

• the future price of commodities;

• the estimation of mineral reserves and mineral resources;

• the realization of mineral reserve estimates;

• the timing and amount of estimated future production (including 2018 and average attributable annual

production over the next five years);

• the costs of future production;

• reserve determination;

• estimated reserve conversion rates and produced but not yet delivered ounces;

• any statements as to future dividends, the ability to fund outstanding commitments and the ability to

continue to acquire accretive precious metal stream interests;

• confidence in the Company’s business structure;

• the Company’s position relating to any dispute with the CRA and the Company’s intention to defend

reassessments issued by the CRA; the impact of potential taxes, penalties and interest payable to the

CRA; possible audits for taxation years subsequent to 2015; estimates as to amounts that may be

reassessed by the CRA in respect of taxation years subsequent to 2010; amounts that may be payable

in res pect of penalties and interest; the Company’s intention to file future tax returns in a manner

consistent with previous filings; that the CRA will continue to accept the Company posting security for

amounts sought by the CRA under notices of reassessment f or the 2005 -2010 taxation years or will

accept posting security for any other amounts that may be sought by the CRA under other notices of

reassessment; the length of time it would take to resolve any dispute with the CRA or an objection to a

reassessment; and assessments of the impact and resolution of various tax matters, including

outstanding audits, proceedings with the CRA and proceedings before the courts; and

• assessments of the impact and resolution of various legal and tax matters, including but not limited to

outstanding class actions.

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Generally, these forward-looking statements can be identified by the use of forward-looking terminology such as

“plans”, “expects” or “does not expect”, “is expected”, “budget”, “scheduled”, “estimates”, “forecasts”, “projects”,

“intends”, “anticipates” or “does not anticipate”, or “believes”, “potential”, or variations of such words and phrases

or statements that certain actions, events or results “may”, “could”, “would”, “might” or “will be taken”, “occur” or

“be ac hieved”. Forward -looking statements are subject to known and unknown risks, uncertainties and other

factors that may cause the actual results, level of activity, performance or achievements of Wheaton to be

materially different from those expressed or implied by such forward-looking statements, including but not limited

to:

• that each party does not satisfy its obligations in accordance with the terms of the Cobalt Stream;

• Vale does not meet the construction timeline, including anticipated completion, of the mine expansion,

including the underground mines, at Voisey’s Bay;

• Vale is unable to commence, or the timing of delivery of cobalt by Vale is delayed or deferred under the

Cobalt Stream or Wheaton is unable to sell its cobalt production delivered under the Cobalt Stream at

acceptable prices or at all;

• Vale does not meet its obligations under the development agreement with the Government of

Newfoundland and Labrador or the impacts and benefits agreements with the Innu Nation and the

Nunatsiavut government;

• the decrease in demand for cobalt , the decrease in uses for cobalt or the discovery of new supplies of

cobalt, any or all of which could result in a decrease to the price of cobalt or a decrease in the ability to

sell cobalt;

• risks related to the satisfa ction of each party's obligations in accordance with the terms of Wheaton’s

precious metal purchase agreements, including any acceleration of payments, estimated throughput and

exploration potential;

• fluctuations in the price of commodities;

• risks related to the Mining Operations including risks related to fluctuations in the price of the primary

commodities mined at such operations, actual results of mining and exploration activities, environmental,

economic and political risks of the jurisdictions in which the Mining Operations are located, and changes

in project parameters as plans continue to be refined;

• absence of control over the Mining Operations and having to rely on the accuracy of the public disclosure

and other information Wheaton receives from the owners and operators of the Mining Operations as the

basis for its analyses, forecasts and assessments relating to its own business;

• differences in the interpretation or application of tax laws and regulations or accounting policies and

rules;

• Wheaton’s interpretation of, or compliance with, tax laws and regulations or accounting policies and

rules, being found to be incorrect or the tax impact to the Company’s business operations being

materially different than currently contemplated;

• any challenge by the CRA of the Company’s tax filings being successful and the potential negative impact

to the Company’s previous and future tax filings;

• the Company’s business or ability to enter into precious metal purchase agreements being materially

impacted as a result of any CRA reassessment;

• any reassessment of the Company’s tax filings and the continuation or timing of any such process is

outside the Company’s control;

• any requirement to pay reassessed tax, and the amount of any tax, interest and penalties that may be

payable changing due to currency fluctuations;

• the Company not being assessed taxes on its foreign subsidiary’s income on the same basis that the

Company pays taxes on its Canadian income, if taxable in Canada;

• interest and penalties associated with a CRA reassessment having an adverse impact on the Company’s

financial position;

• litigation risk associated with a challenge to the Company’s tax filings;

• credit and liquidity risks;

• indebtedness and guarantees risks;

• mine operator concentration risks;

• hedging risk;

• competition in the mining industry;

• risks related to Wheaton’s acquisition strategy;

• risks related to the market price of the common shares of Wheaton;

• equity price risks related to Wheaton’s holding of long-term investments in other exploration and mining

companies;

• risks related to interest rates;

• risks related to the declaration, timing and payment of dividends;

• the ability of Wheaton and the Mining Operations to retain key management employees or procure the

services of skilled and experienced personnel;