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MTA.V ·

Metalla Reports Portfolio Updates

Corporate Updates

METALLA REPORTS PORTFOLIO

UPDATES

(All dollar amounts are in United States dollars unless otherwise

indicated)

TSXV: MTA

NYSE AMERICAN: MTA

VANCOUVER, BC, May 28, 2025 /CNW/ - Metalla Royalty &

Streaming Ltd. ("Metalla" or the "Company") (NYSE American:

MTA) (TSXV: MTA) is pleased to report the following recent

developments in its royalty portfolio:

• Côté & Gosselin – Franco-Nevada announces acquisition of

existing Côté & Gosselin gross margin royalty for $1.05 billion.

• Endeavor – Commissioning underway and first cash flow

scheduled in June.

• Joaquin – Drilling confirms significant extensions to the La

Negra deposit.

"We are encouraged by Franco-Nevada's strong vote of confidence in

Côté and Gosselin as demonstrated by their commitment of over $1

billion. The acquisition marks one of the largest investments in their

history and we believe one of the most significant royalty

transactions," commented Brett Heath, Chief Executive Officer of

Metalla. "Franco-Nevada highlighted(1) the quality of IAMGOLD's work,

stating that following detailed due diligence, it believes Côté to be an

excellent new operation with an extensive Resource endowment that

has high potential to continue expanding. We believe the Gosselin

zone, where Metalla holds a 1.35% NSR royalty covering the entire

deposit, will drive most of that future expansion and that this

transaction should materially enhance market recognition of the value

of our royalty interest."

Côté & Gosselin (1.35% NSR royalty)

Metalla holds a 1.35% Net Smelter Return ("NSR") royalty interest

covering all of IAMGOLD Corporation's ("IAMGOLD") Gosselin

deposit and the northern portion of the Côté mine in Ontario, Canada.

Metalla notes the announcement made by Franco-Nevada

Corporation ("Franco-Nevada") on May 27, 2025, regarding its

acquisition of a 7.5% Gross Margin royalty over the Côté Gold Mine,

which includes the Côté and Gosselin deposits (together, the "Côté

Gosselin Royalty Interest"), for total cash consideration of $1.05

billion. The transaction was completed with the cooperation of

IAMGOLD and Sumitomo Mining Co. Ltd. ("Sumitomo"), who

provided Franco-Nevada with exclusive access to conduct detailed

due diligence.

Franco-Nevada stated, after completing detailed due diligence, that

the large Resource endowment offers excellent potential to expand

milling capacity and grow the current Resource. Franco-Nevada

expects the mill to ramp up to nameplate capacity of 13 Mtpa by year-

end with potential to expand to 20 Mtpa in the longer term to better

align with current mining capacity.

Further, Renaud Adams, President & CEO of IAMGOLD, commented:

"…The value upside of the Côté Gold Mine is further supported by the

rapidly growing Gosselin zone which we intend to incorporate into an

updated mine plan next year that will bring the Côté and Gosselin

zones together to outline a Côté Gold Mine of increased scale and

scope for generations to come."

(1) For more information, please view the Franco-Nevada May 27,

2025 Press Release.

Côté Royalty Map

(CNW Group/Metalla Royalty & Streaming Ltd.)

Endeavor (4.0% NSR royalty)

Metalla holds a 4.0% NSR royalty interest on Polymetals Resources

Ltd.'s ("Polymetals") Endeavor Mine ("Endeavor") in Cobar,

Australia.

On May 21, 2025, Polymetals reported that the redevelopment of the

Endeavor Mine remains on schedule and on budget, with processing

expected to commence in the coming weeks and initial cash flow

anticipated in June. Polymetals noted that mining operations are well

underway, with over 40 kt of ore stockpiled underground.

Development to access high-grade silver ore is advancing as planned,

with first production from these areas expected in July. Polymetals

also confirmed that site activities remain on track to achieve a

processing rate of 65 kt of ore per month during the second half of

2025.

In addition, diamond drilling continues at the Carpark prospect

targeting south extensions to the Main Lode.

For more information, please view the Polymetals Resources May 21,

2025 Press Release.

Joaquin (2.0% NSR royalty)

Metalla holds a 2.0% NSR royalty on Unico Silver's ("Unico") Joaquin

project ("Joaquin") in Santa Cruz, Argentina.

On May 19, 2025, Unico announced that drilling confirmed significant

extensions to the La Negra mineralization with highlight intercepts of

23 meters at 268 g/t AgEq, 64 meters at 81 g/t AgEq and 17 meters at

258 g/t AgEq. The focus for the next phase of drilling will be ongoing

infill and extensional drilling at La Negra to support a maiden JORC

Mineral Resource.

For more information, please view the Unico Silver May 19, 2025

Press Release.

QUALIFIED PERSON

The technical information contained in this news release has been

reviewed and approved by Charles Beaudry, geologist M.Sc., member

of the Association of Professional Geoscientists of Ontario and of the

Ordre des Géologues du Québec. Mr. Beaudry is a QP as defined in

National Instrument 43-101 - Standards of Disclosure for Mineral

Projects ("NI 43-101").

ABOUT METALLA

Metalla provides shareholders with leveraged gold, silver, and copper

exposure by acquiring royalties and streams. Our goal is to increase

share value by accumulating a diversified portfolio of royalties and

streams with attractive returns. Our strong foundation of current and

future cash-generating asset base, combined with an experienced

team, gives Metalla a path to become one of the leading royalty

companies.

For further information, please visit our website at

www.metallaroyalty.com.

ON BEHALF OF METALLA ROYALTY & STREAMING LTD.

(signed) "Brett Heath"

Chief Executive Officer

Neither the TSX Venture Exchange nor its Regulation Services

Provider (as that term is defined in the policies of the Exchange)

accept responsibility for the adequacy or accuracy of this alert.

The securities described herein have not been and will not be

registered under the United States Securities Act of 1933, as

amended, and may not be offered or sold in the United States or to, or

for the account or benefit of, U.S. persons absent registration or an

applicable exemption from registration requirements.

Technical and Third-Party Information

Metalla has limited, if any, access to the properties on which Metalla

holds a royalty, stream or other interest. Metalla is dependent on (i)

the operators of the mines or properties and their qualified persons to

provide technical or other information to Metalla, or (ii) publicly

available information to prepare disclosure pertaining to properties

and operations on the mines or properties on which Metalla holds a

royalty, stream or other interest, and generally has limited or no ability

to independently verify such information. Although Metalla does not

have any knowledge that such information may not be accurate, there

can be no assurance that such third-party information is complete or

accurate. Some information publicly reported by operators may relate

to a larger property than the area covered by Metalla's royalty, stream

or other interests. Metalla's royalty, stream or other interests can

cover less than 100% and sometimes only a portion of the publicly

reported mineral reserves, resources and production of a property.

Ounces are converted to grams using a multiple of 31.1035.

Unless otherwise indicated, the technical and scientific disclosure

contained or referenced in this alert, including any references to

mineral resources or mineral reserves, was prepared in accordance

with Canadian NI 43-101, which differs significantly from the

requirements of the U.S. Securities and Exchange Commission (the

"SEC") applicable to U.S. domestic issuers. Accordingly, the scientific

and technical information contained or referenced in this alert may not

be comparable to similar information made public by U.S. companies

subject to the reporting and disclosure requirements of the SEC.

"Inferred mineral resources" have a great amount of uncertainty as to

their existence and great uncertainty as to their economic and legal

feasibility. It cannot be assumed that all or any part of an inferred

mineral resource will ever be upgraded to a higher category. Historical

results or feasibility models presented herein are not guarantees or

expectations of future performance.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING

STATEMENTS

This alert contains forward-looking statements and forward-looking

information (collectively, "forward-looking statements") within the

meaning of applicable securities legislation. Often, but not always,

forward-looking statements can be identified by the use of words such

as "plans", "expects", "is expected", "budgets", "scheduled",

"estimates", "forecasts", "predicts", "projects", "intends", "targets",

"aims", "anticipates" or "believes" or variations (including negative

variations) of such words and phrases or may be identified by

statements to the effect that certain actions "may", "could", "should",

"would", "might" or "will" be taken, occur, or be achieved. Forward-

looking statements include, but are not limited to, the statements of

the property owners/operators with respect to the properties on which

Metalla holds a royalty; the statements of management regarding an

extensive resource endowment that has high potential to continue

expanding at Cote and Gosselin; the potential to expand milling

capacity and grow the current resource at Cote and Gosselin; that the

Gosselin zone is expected to drive most of the expansion; that the

Côté and Gosselin transaction could materially enhance market

recognition of the value of Metalla's royalty interest; the ramp-up to

nameplate capacity at Côté and Gosselin, and the expected timing

thereof; the commencement of processing at Endeavor and the

expected timing thereof; the initial cash flow at Endeavor and the

expected timing thereof; the commencement of production from high-

grade silver ore areas at Endeavor and the expected timing thereof;

the expected processing rate for the second half of 2025 at Endeavor;

potential south extensions to the Main Lode; the focus of the next

phase of drilling at Joaquin; the expectations generally of Metalla the

property owners/operators and the authors of relevant technical

reports and studies with respect to the mineral projects in which

Metalla has an interest, including without limitation, estimates of

mineral resources and mineral reserves and updates thereto,

production, mine life, NPV, IRR, costs, drilling, development,

permitting, water sourcing, commodity mix and prices, and the timing

thereof; future opportunities and acquisitions; future exploration,

financing, development, production and other anticipated

developments on the properties in which the Company has or has

agreed to acquire an interest; future growth, increased share value,

cash generation and returns; and Metalla having a path to becoming a

leading gold and silver royalty company.

Forward-looking statements and information are based on forecasts of

future results, estimates of amounts not yet determinable and

assumptions that, while believed by management to be reasonable,

are inherently subject to significant business, economic and

competitive uncertainties, and contingencies. Forward-looking

statements and information are subject to various known and

unknown risks and uncertainties, many of which are beyond the ability

of Metalla to control or predict, that may cause Metalla's actual results,

performance or achievements to be materially different from those

expressed or implied thereby, and are developed based on

assumptions about such risks, uncertainties and other factors set out

herein, including but not limited to: that the milling capacity and the

current resource at Cote and Gosselin may not expand and grow as

anticipated; that the Gosselin zone may not drive most of the

expansion; that the Côté and Gosselin transaction may not materially

enhance market recognition of the value of Metalla's royalty interest;

that the ramp-up to nameplate capacity at Côté and Gosselin may not

occur at all or in the expected timing thereof; that the processing at

Endeavor may not commence at all or in the expected timing thereof;

that cash flow may not start at Endeavor at all or in the expected

timing thereof; that the production from high-grade silver ore areas at

Endeavor may not commence at all or in the expected timing thereof;

that the processing rate for the second half of 2025 at Endeavor may

differ from the expectations; that the Main Lode may not expand to the

south; that the focus of the next phase of drilling at Joaquin may differ

from anticipated; the absence of control over mining operations from

which Metalla will purchase precious metals or from which it will

receive stream or royalty payments and risks related to those mining

operations, including risks related to international operations,

government and environmental regulation, delays in mine construction

and operations, actual results of mining and current exploration

activities, conclusions of economic evaluations and changes in project

parameters as plans are refined; problems related to the ability to

market precious metals or other metals; industry conditions, including

commodity price fluctuations, interest and exchange rate fluctuations;

interpretation by government entities of tax laws or the implementation

of new tax laws; regulatory, political or economic developments in any

of the countries where properties in which Metalla holds a royalty,

stream or other interest are located or through which they are held;

risks related to the operators of the properties in which Metalla holds a

royalty or stream or other interest, including changes in the ownership

and control of such operators; risks related to global pandemics,

including the current novel coronavirus (COVID-19) global health

pandemic, and the spread of other viruses or pathogens; influence of

macroeconomic developments; business opportunities that become

available to, or are pursued by Metalla; reduced access to debt and

equity capital; litigation; title, permit or license disputes related to

interests on any of the properties in which Metalla holds a royalty,

stream or other interest; the volatility of the stock market; competition;

future sales or issuances of debt or equity securities; use of proceeds;

dividend policy and future payment of dividends; liquidity; market for

securities; enforcement of civil judgments; and risks relating to Metalla

potentially being a passive foreign investment company within the

meaning of U.S. federal tax laws; and the other risks and uncertainties

disclosed under the heading "Risk Factors" in the Company's most

recent annual information form, annual report on Form 40-F and other

documents filed with or submitted to the Canadian securities

regulatory authorities on the SEDAR website at www.sedar.com and

the U.S. Securities and Exchange Commission on the EDGAR