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Osisko Announces Agreement to Purchase Royalties ON Spartan Resources’ Dalgaranga GOLD Project IN Western Australia

Mergers & Acquisitions Royalties & Streams

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OSISKO ANNOUNCES AGREEMENT TO PURCHASE ROYALTIES ON SPARTAN

RESOURCES’ DALGARANGA GOLD PROJECT IN WESTERN AUSTRALIA

MONTREAL, September 30, 2024 — Osisko Gold Royalties Ltd (the “ Company” or “Osisko ”)

(OR: TSX & NYSE) is pleased to announce that it has entered into a binding agreement to acquire a

1.8% gross revenue royalty (“GRR”) on the Dalgaranga Gold p roject (the “Dalgaranga Royalty” and

the “Project”) operated by Spartan Resources Limited (“Spartan”) in Western Australia. In addition,

Osisko shall also acquire a 1.35% GRR (the “Exploration Royalty”) on additional regional exploration

licenses in proximity to Dalgaranga. The considerations to be paid by Osisko to the seller, Tembo Capital

Mining Fund III (“Tembo”), for the Dalgaranga Royalty and the Exploration Royalty , respectively, total

US$44 million and US$6 million (collectively the “Transaction”). Closing of the Transaction is subject

to approval from Australia’s Foreign Investment Review Board which is expected in the coming weeks.

TRANSACTION HIGHLIGHTS

Exposure to a Premium Gold Development Project in a Top-Tier Mining Jurisdiction

• Dalgaranga is one of the best gold development and production re -start projects globally . The

Project is located in Western Australia, one of the most prolific and well -established mining

jurisdictions; and

• Dalgaranga, a recently mined open pit operation, has been rejuvenated by very impressive new

high-grade discoveries, most notably the Never Never and Pepper deposits, which have shifted the

focus towards ore extraction via underground mining methods.

Near-Term Cash Flow Potential

• The Dalgaranga mill is fully-permitted and approvals for future underground mining are in progress,

providing a clear path to near-term production. The Project is on the verge of re-starting as one of

Western Australia’s next significant high- grade gold mines with first production from underground

likely re-commencing within the next 2 years.

Significant Geological Potential

• High-grade discoveries at the Project continue to drive ongoing underground mineral inventory

growth;

• Spartan expects to complete a Mineral Reserve Estimate update and Feasibility Study both within

the first half of 2025 ; the new underground mine plan will serve as the basis for Spartan’s Final

Investment Decision (“FID”) to re-start operations at Dalgaranga; and,

• In addition to the evolving exploration story at Dalgaranga, the Exploration Royalty provides

exposure to a large prospective land package covering mineralization within trucking distance to

various mills located in the Murchison Gold District.

Jason Attew , President and CEO of Osisko commented: “Osisko’s ability to uncover and execute

accretive near-term cash flow precious metals transactions in Tier-1 mining jurisdictions is synonymous

with our strategy. We believe that Dalgaranga is one of the most attractive gold development and re -

start projects globally given its high-grade underground nature, and its location in the Murchison Gold

District in Western Australia. What the Spartan team has been able to accomplish in terms of resource

discovery and definition at Dalgaranga over the past two years is impressive. We believe that Spartan

will move forward with an FID at the Project before the end of 2025 and that its team will continue to

expand the high-grade resource at Dalgaranga. We’re extremely pleased to be associated with one of

Australia’s most exciting gold development and re- start opportunities, and with an asset that boasts

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such exciting exploration upside potential . We look forward to our partnership with the Spartan team

going forward.”

DALGARANGA ROYALTY - ASSET HIGHLIGHTS

Fully-Permitted Processing Plant in a Tier-11 Mining Jurisdiction

• With most material approvals already in place, the Project is in a position to be advanced quickly

into development and construction upon FID and final project financing; and,

• Significant infrastructure has already been established on site, including a 2.5 million tonnes per

annum sulphide processing mill (gravity and CIL) commissioned in May 2018 and operated until

November 2022 , and associated tailings, water, power and camp facilities to support the

operations (all currently on care & maintenance). Spartan has also commenced construction of

twin exploration declines, which is also likely to also be used for near-term production purposes.

High-Grade, Long Life, and Low-Cost Future Gold Mine

• Spartan’s Dalgaranga licenses cover an area of approximately 509 square kilometers (“km2”) in

the prospective Murchison Gold District of Western Australia;

• As of June 30th, 2024 the global Mineral Resource Estimate (“MRE”) at Dalgaranga consisted of

8.70 million tonnes (“ Mt”) grading 4.98 g/t gold (“ Au”) for 1.393 million ounces (“ Moz”) in the

Indicated category, in addition to 7.44Mt grading 4.56 g/t Au for 1.089 Moz in the Inferred

category;

• The Project’s “high-grade core,” which is spread across the Never Never and Pepper deposits,

consists of 3.88Mt grading 8.74 g/t Au for 1.09 Moz in the Indicated category, and 2.86Mt grading

8.52g/t Au for 0.78 Moz in the Inferred category and currently contains 75% of the identified gold

to date; as such, this area remains a key target for future MRE expansions;

• Spartan is also focused on delineating higher grade underground Mineral Resources for the Four

Pillars and West Winds gold prospects, situated under the historic Gilbey’s open pit;

• Based on the above MRE, Osisko currently expects a mine life of 12+ years at Dalgaranga; and,

• Due to the high -grade nature of the deposit, Osisko expects Dalgaranga to be in the lowest

quartile on the global gold cost curve, once back in production.

Spartan is a Mid-Sized and Experienced Australian Underground Miner

• Spartan is a mid-sized and well-capitalized miner (~A$90 million in cash at June 30, 2024), led

by a management team with a history of exploration success, mine development and operational

expertise;

• Spartan has access to Western Australia’s renowned, highly -skilled and trained local mining

workforce; and,

• Spartan’s key shareholders include Ramelius Resources Limited (18%) and Tembo (10%).

Additional Information

• Spartan has the ability to buy back up to 20% of the Dalgaranga Royalty, as well as 20% of the

Exploration Royalty for a total of A$3.15 million until February 2027.

1 “Tier-1 Mining Jurisdiction” defined as Australia, Canada, or USA

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EXPLORATION ROYALTY HIGHLIGHTS

Large Land Packages and Highly Prospective Exploration Licenses

• The Exploration Royalty covers the 685 km2 Yalgoo Licenses, in addition to ~1000 km2 of other

prospective licenses (including the advanced Glenburgh and Mt Egerton exploration properties,

which have the potential to be a second production hub);

• Yalgoo is approximately 110 kilometers (“km”) Southwest via road from Dalgaranga and hosts

the Melville gold deposit which consists of an open pit MRE which contains 3.35 Mt grading 1.49

g/t Au for 16 0 thousand ounces (“koz”) in the Indicated category, and 1.88Mt grading 1.37 g/t

Au for 83koz in the Inferred category, within a granted Mining Lease;

• Spartan is progressing with permitting of Yalgoo, which is expected to provide feed to

supplement the high-grade ore from Never Never and Pepper;

• Glenburgh is a 768 km2 land package, approximately 300km North of Dalgaranga, and contains

13.5Mt grading 1.0 g/t Au for 431koz in the Indicated category, and 2.80Mt grading 0.90 g/t Au

for 79koz in the Inferred category, spread across 11 separate near-surface deposits, 10 of which

are on a granted Mining Lease; and,

• Mt Egerton is a 237 km2 land package, approximately 300km North of Dalgaranga, and contains

0.23Mt grading 3.40 g/t Au for 25koz in the Indicated category , spread across t wo existing

deposits (Hibernian and Gaffney’s Find), both of which are located within granted Mining Leases.

For more information, please refer to https://spartanresources.com.au/.

Qualified Person

The scientific and technical content of this news release has been reviewed and approved by Guy

Desharnais, Ph.D., P.Geo., Vice President, Project Evaluation at Osisko Gold Royalties Ltd, who is a

“qualified person” as defined by National Instrument 43- 101 – Standards of Disclosure for Mineral

Projects (“NI 43-101”).

About Osisko Gold Royalties Ltd.

Osisko Gold Royalties Ltd is an intermediate precious metal royalty company which holds a North

American focused portfolio of over 185 royalties, streams and precious metal offtakes, including 20

producing assets. Osisko’s portfolio is anchored by its cornerstone asset, a 5% net smelter return royalty

on the Canadian Malartic Complex, one of Canada’s largest gold mines.

Osisko’s head office is located at 1100 Avenue des Canadiens -de-Montréal, Suite 300, Montréal,

Québec, H3B 2S2.

For further information, please contact Osisko Gold Royalties Ltd:

Grant Moenting

Vice President, Capital Markets

Tel: (514) 940-0670 #116

Mobile : (365) 275-1954

Email: [email protected]

Heather Taylor

Vice President, Sustainability & Communications

Tel: (514) 940-0670 #105

Email: [email protected]

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain statements contained in this press release may be deemed “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 Canadi an securities

legislation. Forward-looking statements are statements other than statements of historical fact, that address, without limitation, future events,

the obtaining of the required approval to close the Transaction, that the Project, including the Never Never and Pepper deposits will continue

to be developed and will achieve near-term production re-start within 2 years, that exploration will be successful and that high-grade discovery

will continue to drive growth of mineral inventories, that a Mining Reserve Estimate update and Feasibility Study will be delivered by the first

half of 2025, that exploration potential on land covered by the Exploration Royalty will materialize, that a FID to re-start operations will be made

by Spartan before the end of 2025 and that final project financing will be achieved, that delineation of higher grade undergr ound Mineral

Resources for the Four Pillars and West Winds gold prospects will be achieved, that Osisko’s expectation of a mine life of 12+ years at

Dalgaranga at the lowest quartile on the global cost curve will be accurate, that Spartan will continue to be well capitalized and have access

to highly-skilled workforce, that Spartan may exercise its right to buy back 20% of the Dalgaranga Royalty as well as 20% of the Explor ation

Royalty, production estimates of Osisko’s assets (including increase of production), timely developments of mining properties over which

Osisko has royalties, streams, offtakes and investments, management’s expectations regarding Osisko’s growth, results of oper ations,

estimated future revenues, production costs, carrying value of assets, ability to continue to pay dividend, requirements for additional capital,

business prospects and opportunities future demand for and fluctuation of prices of commodities (including outlook on gold, silver, diamonds,

other commodities) currency, markets and general market conditions. In addition, statements and estimates (including data in tables) relating

to mineral reserves and resources and gold equivalent ounces are forward-looking statements, as they involve implied assessment, based on

certain estimates and assumptions, and no assurance can be given that the estimates will be realized. Forward- looking statements are

statements that are not historical facts and are generally, but not always, identified by the words “expects”, “plans”, “anti cipates”, “believes”,

“intends”, “estimates”, “projects”, “potential”, “scheduled” and similar expressions or variations (including negative variations), or that events or

conditions “will”, “would”, “may”, “could” or “should” occur. Forward-looking statements are subject to known and unknown risks, uncertainties

and other factors, most of which are beyond the control of Osisko, and actual results may accordingly differ materially from those in forward-

looking statements. Such risk factors include, without limitation, (i) with respect to properties in which Osisko holds a royalty, stream or other

interest; risks related to: (a) the operators of the properties, (b) timely development, permitting, construction, commencement of production,

ramp-up (including operating and technical challenges), (c) differences in rate and timing of production from resource estimates or production

forecasts by operators, (d) differences in conversion rate from resources to reserves and ability to replace resources, (e) t he unfavorable

outcome of any challenges or litigation relating title, permit or license, (f) hazards and uncertainty associated with the business of exploring,

development and mining including, but not limited to unusual or unexpected geological and metallurgical conditions, slope failures or cave-ins,

flooding and other natural disasters or civil unrest or other uninsured risks, (g) that development of the Project will be pursued diligently and in

a timely manner, (ii) with respect to other external factors: (a) fluctuations in the prices of the commodities that drive royalties, streams, offtakes

and investments held by Osisko, (b) fluctuations in the value of the Canadian dollar relative to the U.S. dollar, (c) regulatory changes by national

and local governments, including permitting and licensing regimes and taxat ion policies, regulations and political or economic developments

in any of the countries where properties in which Osisko holds a royalty, stream or other interest are located or through whi ch they are held,

(d) continued availability of capital and financ ing and general economic, market or business conditions, and (e) responses of relevant

governments to infectious diseases outbreaks and the effectiveness of such response and the potential impact of such outbreaks on Osisko’s

business, operations and finan cial condition, (f) that conditions will be met to allow Osisko to exercise to exercise certain additional rights

granted by Savannah; (iii) with respect to internal factors: (a) business opportunities that may or not become available to, or are pursued by

Osisko, (b) the integration of acquired assets or (c) the determination of Osisko’s PFIC status. The forward- looking statements contained in

this press release are based upon assumptions management believes to be reasonable, including, without limitation: that Spartan will maintain

development of the Dalgaranga Project in a manner consistent with past activities; that public disclosure concerning the Proj ect remains

accurate; that no adverse development occurs in respect of the Project; and the absence of any other factors that could cause actions, events

or results to differ from those anticipated, estimated or intended and the absence of significant change in the Corporation’s ongoing income

and assets relating to determination of its PFIC status; the absence of any other factors that could cause actions, events or results to differ

from those anticipated, estimated or intended and, with respect to properties in which Osisko holds a royalty, stream or other interest, (i) the

ongoing operation of the proper ties by the owners or operators of such properties in a manner consistent with past practice and with public

disclosure (including forecast of production), (ii) the accuracy of public statements and disclosures made by the owners or operators of such

underlying properties (including expectations for the development of underlying properties that are not yet in production), (iii) no adverse

development in respect of any significant property, (iv) that statements and estimates relating to mineral reserves and resources by owners

and operators are accurate and (v) the implementation of an adequate plan for integration of acquired assets.

For additional information on risks, uncertainties and assumptions, please refer to the most recent Annual Information Form of Osisko filed on

SEDAR+ at www.sedarplus.ca and EDGAR at www.sec.gov which also provides additional general assumptions in connect ion with these

statements. Osisko cautions that the foregoing list of risk and uncertainties is not exhaustive. Investors and others should carefully consider

the above factors as well as the uncertainties they represent and the risk they entail. Osisko believes that the assumptions reflected in those

forward-looking statements are reasonable, but no assurance can be given that these expectations will prove to be accurate as actual results,

and prospective events could materially differ from those anticipated such the forward-looking statements and such forward-looking statements

included in this press release are not guarantee of future performance and should not be unduly relied upon. In this press release, Osisko

relies on information publicly disclosed by a third party pertaining to its assets and, therefore, assumes no liability for such third -

party public disclosure. These statements speak only as of the date of this press release. Osisko undertakes no obligation to publicly update

or revise any forward- looking statements, whether as a result of new information, future events or otherwise, other than as required by

applicable law.