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Wheaton Precious Metals Acquires GOLD and Palladium Stream ON Stillwater

Royalties & Streams

FOR IMMEDIATE RELEASE TSX: WPM

July 16, 2018 NYSE: WPM

WHEATON PRECIOUS METALS ACQUIRES

GOLD AND PALLADIUM STREAM ON STILLWATER

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

“Company”) is pleased to announce that its wholly -owned subsidiary, Wheaton Precious

Metals International Ltd (“Wheaton International”) has agreed to acquire from Sibanye Gold

Limited ("Sibanye-Stillwater") (JSE: SGL; NYSE:SBGL) an amount of gold and palladium

equal to a fixed percentage of production from the Stillwater and East Boulder mines,

collectively “Stillwater” (the “ Precious Metals Stream”). Wheaton International will pay

Sibanye-Stillwater upfront cash consideration of US$500 million upon closing of the Precious

Metals Stream. In addition, Wheaton will make ongoing payments equal to 18% of the spot

gold price and spot palladium price until the reduction of the advanced payment to nil, and

22% of the spot gold price and spot palladium price thereafter. The Precious Metals Stream

is effective July 1, 2018.

TRANSACTION HIGHLIGHTS

▪ Adds to Wheaton’s existing high-quality portfolio

• Wheaton International will receive an amount of gold equal to 100% of the

Stillwater gold production for the life of mine.

• Wheaton International will initially receive an amount of palladium equal to 4.5%

of Stillwater palladium production, decreasing to 2.25% and then 1% based on

defined delivery thresholds, for the life of mine.

• Stillwater is one of the lowest cost platinum group metals mines globally and is

located in Montana in the United States.

• Subsequent to the closing of this acquisition, Wheaton’s estimated Proven and

Probable gold reserves increase by 410 thousand ounces (“Koz”) and Inferred

gold resources increase by 920 Koz. And, for the first time, Wheaton will have

estimated Proven and Probable palladium reserves of 610 Koz and Inferred

palladium resources of 430 Koz.1

▪ Adds long-term production and exploration upside potential

• For the 10 years starting in 2019, production is forecast to average approximately

14.5 Koz of gold and 29 Koz of palladium per year, or approximately 37 Koz of

gold equivalent per year.2

• For the 20 years starting in 2019, production is forecast to average approximately

14.7 Koz of gold and 24 Koz of palladium per year, or approximately 33 Koz of

gold equivalent per year.2

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• Declared current reserves are sufficient to support mining activities at Stillwater

until 2041, but this could be significantly extended should inferred resources be

upgraded.3

• Significant exploration potential exists both regionally and at depth below current

mineral reserves and resources. Of significance is the 12.2 kilometre undeveloped

mineralized section between the currently producing Stillwater and East Boulder

mines.

▪ Immediate production and cash flow

• This acquisition increases Wheaton's production profile with attributable sales

starting July 1, 2018 with expected production in the second half of 2018 forecast

to be approximately 5.4 thousand gold ounces and 10.4 thousand palladium

ounces.

"Stillwater is another accretive addition to Wheaton’s portfolio of assets that is expected to

contribute both production and cash flow for decades to come,” said Randy Smallwood,

Wheaton’s President and Chief Executive Officer. "What mainly attracted us to this

opportunity was the quality and size of the J-M Reef deposit, coupled with the ongoing

expansion at the Blitz Project . There are over 12 kilometres of undeveloped mineralization

associated with the J -M Reef between the two currently producing mines. With a mine life

extending well into the foreseeable future, we believe Stillwater will be one of Wheaton’s

foundational assets for many years to come. Finally, the acquisition will be funded through

our current r evolving credit facility, which we are comfortable utilizing given our industry

leading cash flow.”

TRANSACTION TERMS

▪ The Precious Metals Stream is effective July 1, 2018.

▪ Wheaton International will be entitled to receive from Sibanye-Stillwater an amount of

gold equal to 100% of Stillwater gold production for the life of mine.

▪ Wheaton International will be entitled to an amount of palladium equal to:

• 4.5% of Stillwater palladium production until 375 Koz delivered to Wheaton;

• Thereafter, 2.25% of Stillwater palladium production until 550 Koz delivered

to Wheaton; and,

• 1% of Stillwater palladium production thereafter for the life of mine.

▪ Wheaton International will pay Sibanye-Stillwater cash consideration of US$500

million upon closing of the Precious Metals Stream.

▪ Wheaton International will make ongoing payments equal to 18% of the spot gold

price and spot palladium price until the reduction of the advanced payment to nil, and

22% of the spot gold price and spot palladium price thereafter.4

▪ Payable rates for gold and palladium have been fixed at 99.0% and 99.6%,

respectively.

▪ Gold and palladium deliveries will be the obligation of Sibanye-Stillwater but will be

guaranteed by certain Sibanye -Stillwater subsidiaries, including Stillwater Mining

Company (the owner of Stillwater).

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▪ The Precious Metals Stream includes a completion test on the development of the

Blitz Project , including completion of underground development, critical surface

infrastructure and concentrator production output.

▪ The stream area of interest is defined as the area inclusive of all patented and

unpatented claims at the Stillwater mining operations.

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

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

ABOUT STILLWATER

Stillwater is the only US -based mine for platinum group metals (“PGM”s) and the largest

primary producer of PGMs outside of South Africa and the Russian Federation. Located in

Montana, US, Stillwater’s operations consist of two underground PGM mines (the Stillwater

Mine and East Boulder Mine), the Blitz Project and the Columbus metallurgical complex. The

mining asse ts are located in the front range of the Beartooth Mountains with elevations

exceeding 1,500 metres above mean sea level.

The Stillwater Mine and East Boulder Mine have been in operation since 1986 and 2002,

respectively. The mines produce from the J-M Reef, the world’s highest-grade PGM deposit.

Each mine has its own milling and concentrator infrastructure on site. The Blitz Project, part

of the Stillwater mine, started ore production in 2017 and is expected to ramp up to full

production in 2021.

The Columbus metallurgical complex is a state -of-the-art operation that is capable of

providing smelting and refining processes for mine concentrates. The complex produces a

PGM-rich filter cake that is shipped to a third-party precious metal refinery.

Below are Wheaton’s attributable Mineral R eserves and Resources in respect of the

Stillwater mine.

Attributable Mineral Reserves and Mineral Resources – Stillwater, effective as of

December 31, 2017

Category

Streamed

Metal

Tonnage

Mt

Grade

Au g/t

Grade

Pd g/t

Contained

Au Moz

Contained

Pd Moz

Proven

Gold

5.0 0.31 0.05

Probable 36.8 0.31 0.36

Proven

Palladium

0.2 13.2 0.08

Probable 1.3 12.6 0.53

Total P&P

Gold 41.8 0.31 0.41

Palladium 1.5 12.7 0.61

Inferred

Gold 92.5 0.31 0.92

Palladium 1.0 12.9 0.43

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FINANCING THE TRANSACTION

The initial upfront cash payment of US$500 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. The Company recently acquired a cobalt stream from Vale S.A.’s

Voisey’s Bay mine, which was also funded using the revolving credit facility. Net debt for the

company, including the acquisition costs of streams on Stillwater and Voisey’s Bay will be

approximately $1.4 billion. 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).

PALLADIUM – A PRECIOUS METAL WITH A PURPOSE6

Palladium is a PGM and is generally considered a precious metal and offers significant

practical application as it is considered to be integral to reducing emissions caused by

gasoline-powered internal combustion engines.

Palladium mine supply is highly concentrated, with a pproximately 80% of annual supply

coming from just two countries: South Africa and Russia. Disruption in either country has

potential for outsized market influence. In addition, palladium is mined overwhelmingly as a

by-product, which results in mine supply being relatively price-inelastic (i.e. the economics of

mine supply is driven primarily by consideration of other metals). Half of mine supply comes

from nickel -copper mines, 40% comes from primary platinum mines and just under 10%

comes from primary palladium mines.

The automobile industry became the biggest end-user of PGMs in the late-1970s. PGMs in

autocatalytic converters help reduce harmful emissions caused by internal combustion

engines. Palladium resists oxidation, high temperature corrosion and is particularly effective

in scrubbing hydrocarbon emissions. Its application by the industry began to accelerate in

the late-1990s and has in the intervening years replaced its cousin – platinum – in gasoline-

powered vehicles. A spate of recent government announceme nts from around the world

regarding diesel-powered vehicles strongly suggests that gasoline-based engines – and thus

palladium – is expected to be gaining market share at the expense of diesel for the

foreseeable future.

Fully-electric vehicles do not u se PGMs; however, vehicles that are the intermediate stage

between combustion and pure battery power (e.g. hybrids, plug -in hybrids) do use

PGMs. While it is reasonable to expect combustion -vehicles to lose market share over the

coming decades , the rise of overall vehicle sales and higher loadings per vehicle are

anticipated to maintain demand for PGMs . Though North American and European markets

are saturated, the analyst community expects vehicle growth in China and India to raise the

overall global total. Tightening emission targets around the world add further support for the

long-term necessity of palladium. While the pie slice may eventually shrink, the overall pie is

growing and there will be more palladium per slice (and that’s delicious).

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UPDATED FIVE-YEAR PRODUCTION GUIDANCE

Wheaton is pleased to provide its updated five-year production guidance, which now includes

both palladium and cobalt production estimates , in the table below . Given the timing of the

effectiveness of the Stillwater and Voisey’s Bay streams, palladium and cobalt production are

given as average annual production as of 2019 and 2021, respectively. Average annual gold

production is inclusive of gold from Stillwater from 2019 to 2022 as gold production from

Stillwater in 2018 is only for half of the year. For context, on a gold equivalent ounce (“GEO”)

basis, five-year average annual production is approximately 730 thousand GEOs based on

gold, silver and palladium, or approximately 800 thousand GEOs if cobalt is included as well.7

Forecast Average Annual Production

Metal Streamed Average Annual Production

2018E 2019E 2020E 2021E 2022E

Gold 385 thousand ounces / year8

Silver 25 Million ounces / year

Palladium 10.4 koz 27 thousand ounces / year

Cobalt 2.1 million pounds / year

ABOUT SIBANYE-STILLWATER

Stillwater was purchased by Sibanye -Stillwater in May 2017. Sibanye -Stillwater is the third

largest producer of platinum and palladium and features amongst the world’s top gold

producing companies with operations in two main regions: South Africa and the U nited

States. Sibanye-Stillwater has over the years developed several safety initiatives, including

the creation and investment in “Digimine ,” a joint venture between Sibanye -Stillwater,

academic institutions and other stakeholders. This initiative priorit izes the use of digital

technology for enhanced safety applications including focus areas of seismicity and pro -

active monitoring of underground environmental conditions. Wheaton is pleased to have the

opportunity to support Sibanye-Stillwater’s initiatives through further investment linked to

Digimine, facilitating the fast tracking of certain technology prototypes into Sibanye -

Stillwater’s underground environment.

CONFERENCE CALL

A conference call will be held on July 16, 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

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

Pass code: 9391518

Live audio webcast: www.wheatonpm.com

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

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The conference call will be recorded and available until July 23, 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: 9391518

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

RBC Capital Markets 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) 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 Stillwater including accompanying footnotes.

2) Production estimates based upon Competent Person’s Report of the Montana Platinum Group Metal Mineral

Assets for Sibanye Gold Limited, United States of America, dated November 2017, and prepared by The Mineral

Corporation. Assumptions for converting to GEOs: Pd $990/oz and Gold $1,270/oz. Production forecast contain

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

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

and important disclosure associated with this information.

3) Mine life is based on recoverable reserves and resources as of December 31, 2017 and based on the mine

plan provided by Sibanye-Stillwater as of June 2018.

4) Production payment is subject to further downward adjustment based upon Sibanye-Stillwater’s leverage

ratios.

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

6) The following sources were referenced in the discussion on palladium: Loferski, Patricia J. “Platinum-Group

Metals (Ir, Os, Pd, Pt, Rh, Ru)” Metal Prices in the United States Through 2010. United States Geological

Survey. 05-Mar-2010; Steel, James. "PGM Outlook" Commodities, Precious Metals, HSBC Global Research.

22-Nov-2017; Agate, Nell, Johann Steyn and Raghav Gupta-Chaudhary. "PGMs: Demand impact of LDV

diesel-engine erosion" Commodities Industry Focus, Commodities. Citi Research. 13-Oct-2017; Metals Focus.

Platinum & Palladium Focus 2017. May-2017.

7) GEOs are calculated based on the following commodity prices: $1,270 per gold ounce, $16.50 per silver

ounce, $960 per palladium ounce, and $40 per cobalt pound.

8) Average annual five-year gold production is the sum of the expected average annual production for all

streamed assets over 2018-2022 except for Stillwater; as 2018 is only a partial year of production, the average

annual production for Stillwater from 2019-2022 was used in the calculation for the total average annual gold

production for 2018-2022.

- 7 -

ATTRIBUTABLE MINERAL RESERVES & MINERAL RESOURCES FOR STILLWATER

Effective as of December 31, 2017

Mine Category Stream Mt Au g/t Pd g/t Au Moz Pd Moz

Stillwater

Proven Gold 2.6 0.31 0.03

Probable 15.1 0.31 0.15

Proven Palladium 0.1 16.0 0.05

Probable 0.5 15.7 0.27

East

Boulder

Proven Gold 2.4 0.30 0.02

Probable 21.6 0.31 0.21

Proven Palladium 0.1 10.2 0.03

Probable 0.8 10.5 0.26

Total P&P Gold 41.8 0.31 0.41

Palladium 1.5 12.7 0.61

Stillwater

Inferred Gold

48.9 0.27 0.42

East

Boulder 43.6 0.36 0.50

Stillwater

Inferred Palladium

0.5 13.6 0.24

East

Boulder 0.5 12.2 0.19

Total Inferred Gold 92.5 0.31 0.92

Palladium 1.0 12.9 0.43

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”), grams

per metric tonne (“g/t”) and millions of ounces (“Moz”).

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

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 recoveries of palladium to a PGM concentrate average approximately 92%. Process

recoveries of gold, being a by-product, is not measured but has been assumed to be line with

palladium.

• Mineral Reserves at Stillwater are estimated using appropriate process and mine recovery rates,

dilution, operating costs and the following cut-offs:

o Stillwater mine – combined platinum and palladium grade cut-offs of 10.29 g/t for Off-shaft

areas and 6.86 g/t for Farwest

o East Boulder mine – combined platinum and palladium cut-off of 6.86 g/t

• Mineral Resources at Stillwater are estimated using appropriate process recovery rates and the

following cut-offs:

- 8 -

o Stillwater mine and East Boulder mine – geologic boundaries for Inferred Mineral Resources

• The Stillwater precious metals purchase agreement provides that effective July 1, 2018. Sibanye-

Stillwater will deliver 100% of the gold production for the life of the mine and 4.5% of palladium

production until 375,000 ounces are delivered, 2.25% of palladium production until a further 175,000

ounces are delivered and 1.0% of the palladium production thereafter for the life of the mine.

Attributable palladium Mineral Reserves and Mineral Resources have been calculated based upon the

4.5% / 2.25% / 1.0% production entitlements.

• The Stillwater mine has been in operation since 1986 and East Boulder mine since 2002. Individual

grades for platinum, palladium, gold and rhodium are estimated using ratios applied to the combined

platinum plus palladium grades based upon average historic production results provided to the

Company as of the date of this document. As such, the Attributable Mineral Resource and Mineral

Reserve palladium and gold grades for the Stillwater mines have been estimated using the following

ratios:

o Stillwater mine: Pd = (Pt + Pd) / (1/3.51 + 1) and Au = (Pd + Pt) x 0.0153

o East Boulder mine: Pd = (Pt + Pd) / (1/3.6 + 1) and Au = (Pd + Pt) x 0.0227

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

Mineral Resources and Mineral Reserves will be influenced by changes in platinum and palladium

prices at the time.

• Full Mineral Reserve and Mineral 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$500 million to Sibanye-Stillwater in connection with

the Precious Metals Stream;

• the timing of delivery of gold and palladium by Sibanye-Stillwater under the Precious Metals Stream;

• the receipt of Wheaton of gold and palladium production in respect of Stillwater;

• the demand, uses and supply of gold and palladium;

• the construction timeline, including completion, of the Blitz Project.

• the commencement and timing of delivery of gold and palladium by Sibanye-Stilwater under the Precious

Metals 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;

• 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;