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Metalla Reports Financial Results FOR the Second Quarter of 2025 and Provides Asset Updates

Financials

METALLA REPORTS FINANCIAL RESULTS FOR THE SECOND QUARTER OF 2025

AND PROVIDES ASSET UPDATES

(All dollar amounts are in thousands of United States dollars unless otherwise indicated, except for shares,

per ounce, and per share amounts)

FOR IMMEDIATE RELEASE TSXV: MTA

NYSE American: MTA

August 14, 2025

Vancouver, Canada: Metalla Royalty & Streaming Ltd. (“Metalla” or the “Company”) (TSXV: MTA)

(NYSE American: MTA) announces its operating and financial results for the three and six months

ended June 30, 202 5. For complete details of the condensed interim consolidated financial

statements and accompanying management's discussion and analysis (“MD&A”) for the three

and six months ended June 30, 202 5, please see the Company's filings on SEDAR +

(www.sedarplus.ca) or EDGAR ( www.sec.gov). Shareholders are encouraged to visit the

Company's website at www.metallaroyalty.com.

Brett Heath, CEO of Metalla, commented, “The second quarter of 2025 marked another

important milestone in Metalla’s growth, highlighted by the successful closing of our inaugural

revolving credit facility and recommissioning of the Endeavor Mine. The facility lowers our cost of

capital and materially enhances our financial flexibility to continue scaling our business. We are

also pleased that, in its first month of production, the Endeavor Mine has achieved its operating

costs targets while producing 5,398 dry metric tonnes of silver -lead concentrate in July. We

anticipate our first cash flows in the third quarter. Further and subsequent to quarter end, we are

delighted to see Hudbay’s joint venture announcement for a 30% interest in Copper World b y

Mitsubishi Corporation and Equinox Gold’s announcement that Castle Mountain has been

accepted into the United States Federal Permitting Improvement Steering Council’s FAST -41

Program as we believe both updates are key to progressing these assets to a construction

decision.”

COMPANY HIGHLIGHTS

Key Company highlights for the three mo nths ended June 30, 2025 , and subsequent period

include:

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• On June 2 4, 2025, the Company entered into an agreement with the Bank of Montreal

and National Bank Financial for a revolving credit facility (“RCF”) of up to $40.0 million with

an accordion feature for an additional $35.0 million in availability, subject to the

satisfaction of certain conditions. Concurrent with entering into the RCF, the Company

also fully repaid and retired a C$50.0 million convertible loan facility with Beedie

Investments Ltd.;

• On June 26, 2025, the Company announced the release of its 2025 Asset Handbook

outlining the Company’s gold, silver, and copper royalties and streams, as well as Mineral

Reserve and Mineral Resource data for the underlying properties. The Asset Handbook is

available on the Company’s website;

• On July 9, 2025, Polymetals Resources Ltd. (“ Polymetals”) announced that it had

successfully refurbished and commissioned the Endeavor mine (“Endeavor”) and

processing plant with first concentrate shipment scheduled for July. On August 4, 2025,

Polymetals announced that Endeavor was now meeting its operating costs after its first full

month of production and had produced 5,398 dry metric tonnes of silver-lead concentrate

during July and had received concentrate prepayments of A$11.6 million;

• On August 11, 2025, Equinox Gold Corp. (“Equinox”) announced that its Castle Mountain

Mine Phase 2 Project (“Castle Mountain”) has been accepted into the FAST -41 program.

FAST-41 is a federal permitting framework designed to streamline environmental reviews,

improve interagency coordination, and increase transparency. Acceptance into the

program is expected to enhance regulator y certainty through a defined permitting

schedule that may reflect reduced permitting timelines. Based on the permitting timeline

posted to the FAST-41 project dashboard on August 8, 2025, the federal permitting process

should be completed in December 2026; and

• On August 13, 2025, Hudbay Minerals Inc. (“Hudbay”) announced a $600 million strategic

investment from Mitsubishi Corporation (“ Mitsubishi”) for a 30% joint venture interest in

Copper World. The contribution from Mitsubishi will consist of $420 million upon closing and

a $180 million matching contribution payable no later than 18 months following the closing.

Mitsubishi will contribute 30% of the ongoing costs beginning August 31, 2025, and will

participate in the funding of the definitive feasibility study as well as the final project design,

project financing, and project construction for Copper World.

Key operating and financial metrics for the Company include:

Three months ended Six months ended

June 30, June 30, June 30, June 30,

2025 2024 2025 2024

Revenue from royalty interests(1) $2,695 $875 $4,416 $2,130

Net loss $(1,603) $(1,491) $(2,334) $(3,223)

Adjusted EBITDA(2) $1,485 $165 $2,351 $243

Total attributable GEOs(2) 840 401 1,468 1,025

Average realized price per attributable GEO(2) $3,289 $2,332 $3,104 $2,173

Average cash cost per attributable GEO(2) $8 $17 $10 $12

Operating cash margin per attributable GEO(2) $3,281 $2,315 $3,094 $2,161

(1) For the methodology used to calculate attributable Gold Equivalent Ounces (“GEOs”), see Non-IFRS Financial Measures.

(2) Adjusted for the Company’s proportionate share of NLGM held by Silverback.

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ASSET UPDATES

Below are updates for the three months ended June 30, 2025, and subsequent period to certain

of the Company’s assets, based on information publicly filed by the applicable project owner:

Tocantinzinho

On July 8, 2025, G Mining Ventures Corp. (“G Mining”) reported second quarter gold production

of 42.6 Koz and that the processing plant reached nameplate capacity of 12,890 tonnes per day

(“tpd”) over 30 consecutive days. G Mining also reaffirmed their 2025 production guidance of 175

to 200 Koz with 56% of output concentrated in the second half of the year as higher -grade ore

becomes accessible deeper in the pit.

Metalla accrued 309 GEOs from Tocantinzinho for the second quarter of 2025.

Metalla holds a 0.75% Gross Value Return (“GVR”) royalty on Tocantinzinho.

Wharf

On August 6, 2025, Coeur Mining, Inc. (“Coeur”) reported second quarter gold production of 24.1

Koz. Gold production in the second quarter increased 18% quarter-over-quarter driven by higher

gold grades. Exploration expenditures for the second quarter were $4 million with expansion and

infill drilling programs at Wedge and North Foley completed during the quarter, results met

expectations with both zones expected to contribute meaningfully to year -end reserve and

resource estimates. Coeur indicated that e xploration priorities in the third quarter include infill

drilling at Juno, following up on 2024 expansion drilling, which extended mineralization

approximately 500 feet to the northwest. Coeur reaffirmed its full year guidance for 2025 at Wharf

of 90 – 100 Koz gold and announced it expects to spend $13 to $17 million on capital expenditures

to materially extend the mine life as well as other investments which are expected to be required

to convert the Juno and North Foley deposits into reserves.

Metalla accrued 279 GEOs from Wharf for the second quarter of 2025.

Metalla holds a 1.0% GVR royalty on the Wharf mine.

Aranzazu

On August 5, 2025, Aura Minerals Inc. (“Aura”) reported second quarter production from Aranzazu

of 22,281 GEOs (as defined by Aura) , marking a 9% increase over the first quarter of 2025. The

increase was driven by higher grades and improved recoveries, attributed to greater stability in

the grinding-flotation circuits and the introduction of more effective reagents. During the quarter,

infill drilling at the Glory Hole zone focused on converting Inferred to Indicated Mineral Resources

in deeper parts of the deposit. Drilling confirmed continuity of the mineralized skarn, with highlight

intercepts of 5.86% copper, 1.3 g/t gold, and 62 g/t silver over 25.5 meters, and 0.95% copper,

0.33 g/t gold, and 10 g/t silver over 26 meters. At Esperanza, drilling continued to confirm

mineralization continuity, with notable results including 2.3% copper, 0.88 g/t gold, and 20 g/t

silver over 6.4 meters, and 0.72% copper, 0.27 g/t gold, and 5 g/t silver over 3.35 meters.

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On May 5, 2025, Aura highlighted the release of an updated National Instrument 43 -101 -

Standards of Disclosure for Mineral Projects (“NI 43-101”) technical report for Aranzazu on April 1,

2025, which confirmed a 10 -year mine life and projected average annual production of 28.1

million pounds of copper, 25.2 Koz of gold, and 652 Koz of silver.

Metalla accrued 175 GEOs from Aranzazu for the second quarter of 2025.

Metalla holds a 1.0% Net Smelter Returns (“NSR”) royalty on Aranzazu.

La Guitarra

On July 31, 2025, Sierra Madre Gold & Silver Ltd. (“Sierra Madre”) announced closing of the final

tranche of a C$19.5 million private placement , with net proceeds to be used to expand the

capacity of the La Guitarra mine and conduct a detailed exploration program, including drilling

in the East District of the La Guitarra property.

On April 29, 2025, Sierra Madre announced the commencement of underground mining at the

Coloso mine, located within the Guitarra complex. The Coloso mine is located 4 kilometers from

the Guitarra processing plant and was previously mined allowing Sierra Ma dre to restart

operations with minimal pre -production expenditures and seven months ahead of schedule.

Sierra Madre noted that the Coloso Mineral Resource grades are 1.7 times higher in silver and 1.2

times higher in gold than the Guitarra vein, which served as the initial mining front at La Guitarra.

Metalla accrued 30 GEOs from La Guitarra for the second quarter of 2025.

Metalla holds a 2.0% NSR Royalty on La Guitarra, subject to a 1.0% buyback for $2.0 million. The

Company’s NSR royalty covers 100% of the Guitarra complex, including the Guitarra, Coloso, and

Nazareno mines.

La Encantada

On July 8, 2025, First Majestic Silver Corp. reported production of 49 oz of gold from La Encantada

in the second quarter of 2025. During the quarter, one underground rig completed 2,546 meters

of drilling on the property.

Metalla accrued 26 GEOs from La Encantada for the second quarter of 2025.

Metalla holds a 100% GVR royalty on gold produced at the La Encantada mine limited to 1.0 Koz

annually.

Endeavor

On August 4, 2025, Polymetals announced that Endeavor was now meeting its operating costs

after its first full month of production. Endeavor produced 5,398 dry metric tonnes of silver -lead

and zinc concentrates during July and has agreed to a second pre -payment with its offtake

partner of A$11.6 million. Polymetals announced that z inc concentrate transports from site will

commence mid -August with the first ocean shipment scheduled for early September. The

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operational ramp -up remains on track, with mining of the high -grade Upper North silver ore

expected to begin in August.

On July 9, 2025, Polymetals announced that it had successfully refurbished and commissioned

the Endeavor mine and processing plant. Mining and processing activities were ramping up to

planned levels, with production of silver -lead-zinc concentrate well underway. Polymetals

reported that first ore was treated on June 7, with a total of 36,066 dry metric tonnes of

commissioning ore processed, grading 103 g/t silver, 3.72% z inc, and 2.31% lead. Site activities

remain on track to process an average of 65,000 dr y metric tonnes of ore per month during the

second half of 2025. Exploration during the second quarter focused on the Carpark target and

Endeavor South. At Endeavor South, drilling intersected encouraging alteration, veining, and

visible sulphides, including elevated copper values, supporting the potential continuation of the

mineral system south of the Endeavor main lode.

Metalla holds a 4.0% NSR royalty on lead, zinc and silver produced from Endeavor and expects

its first cash flow in the third quarter of 2025 at which point it will be classified as producing.

Gurupi (formerly CentroGold)

On July 23, 2025, G Mining reported that a Brazilian federal court had nullified legacy

environmental licenses granted in 2011 to a prior operator, resolving a longstanding legal dispute

over the Gurupi Project and providing a clean regulatory path forward. The ruling allows G Mining

to initiate a new environmental licensing process, including the preparation of a full

environmental impact assessment and engagement with the National Institute for Colonization

and Agrarian Reform. G Mining also announced a budget of $2 to $4 million has been allocated

to Gurupi for 2025, with a larger budget to be mobilized in the second half of the year upon

receipt of the necessary exploration permits.

Metalla holds a 1.0% NSR royalty on the first 500 koz of production, 2.0% NSR royalty on the next 1

Moz, and 1.0% NSR royalty thereafter on Gurupi.

Côté-Gosselin

On August 7, 2025, IAMGOLD Corporation (“IAMGOLD”) reported in their second quarter MD&A

that approximately 19,700 meters of drilling were completed at the Gosselin deposit during the

quarter (31,700 meters year-to-date). The program was focused on increasing confidence in the

existing resource and conv erting a significant portion of Inferred Resources to the Indicated

category. IAMGOLD plans to drill a total of 45,000 meters at Gosselin in 2025, however this

program could increase. In addition, 6,500 meter s of the 20,000 -meter infill drill program

commenced in the second quarter of 2025 to improve resource confidence in the northeastern

extension of the Côté deposit. According to IAMGOLD, t he results of the Gosselin exploration

program are expected to be included in an updated Mineral Reserve and Resource estimate

next year and will inform the updated technical report which IAMGOLD announced will consider

a larger scale Côté gold mine with a conceptual mine plan targeting both the Côté and Gosselin

zones over life of mine. The updated technical report is expected to be completed by the end

of 2026.

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IAMGOLD also reported gold production at Côté gold mine in the second quarter was 96 Koz, as

the mine continues to ramp up following the start of production in 2024. Mining activities continue

to expand the pit and increase the volume of blasted ore in the pit to provide flexibility in

supporting the planned m ill feed with reduced handling. Production at Côté Gold in 2025 is

expected to be in the 360 – 400 Koz range.

Figure 1: Long section of Côté and Gosselin conceptual super pit (Source: IAMGOLD Q2 2025 Presentation)

Metalla holds a 1.35% NSR royalty cover ing less than 10% of the Côté Mineral Reserves and

Resources estimate in the northeastern portion of the pit design, as well as 100% of the Gosselin

Mineral Resource estimate.

Castle Mountain

On August 11, 2025, Equinox reported that Castle Mountain has been accepted into the United

States Federal Permitting Improvement Steering Council’s FAST -41 program. FAST-41 is a federal

permitting framework designed to streamline environmental reviews, improve interagency

coordination, and increase transparency. Acceptance into the program is expected to enhance

regulatory certainty through a defined permitting schedule that may reflect reduced permitting

timelines. Based on the permitting timeline posted to the FAST-41 project dashboard on August 8,

2025, the federal permitting process should be comple ted in December 2026. Equinox further

stated that with FAST-41 permitting status in place, that it has initiated study updates and project

optimization to align with the permitting timeline and position the project for a timely construction

decision. Based on a 2021 Feasibility Study, the project is expected to produce 200 Koz gold

annually over a 14 year mine life, totaling 3.2 million ounces.

On May 7, 2025, Equinox reported in their first quarter MD&A that they are continuing to advance

engineering and permitting for Castle Mountain. Equinox reiterated its expectation that the lead

agencies will publish a notice of intent in 2025, which would commence the formal permitting

review process, and announced that a memorandum of understanding has been signed among

the project lead agencies to prepare the joint Environmental Impact Statement/Environmental

Impact Report (“EIS/EIR”). Equinox expects the EIS/EIR stage of formal environmental analysis to

occur throughout 2025 and 2026.

Metalla holds a 5.0% NSR royalty on the South Domes area of Castle Mountain.

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Taca Taca

On July 23, 2025, First Quantum Minerals Ltd. (“ First Quantum”) reported in their second quarter

MD&A that the Environmental and Social Impact Assessment (“ESIA”) continues to be reviewed

by the Secretariat of Mining of Salta Province. First Quantum is awaiting a consolidated technical

report from provincial authorities, following an independent evaluation conducted by SEGEMAR

(Argentinian Geological and Mining Service) in the four th quarter of 2024. First Quantum also

stated that it is preparing an update d NI 43-101 Technical Report for Taca Taca , and plans to

submit an application for the RIGI regime, a new incentive regime for large investments created

by the Argentine government.

Metalla holds a 0.42% NSR royalty on Taca Taca subject to a buyback based on the amount of

Proven Reserves in a feasibility study multiplied by the prevailing market prices of all applicable

commodities.

Joaquin

On July 29, 2025, Unico Silver Ltd. (“Unico”) announced the results of continued drilling at Joaquin,

aimed at expanding mineralization and converting the Foreign Resource Estimate (as defined by

Unico) to a maiden JORC compliant resource. Step out drilling at La Marocha SE returned a

highlight intercept of 163 g/t AgEq (as defined by Unico) over 69 meters. Further, initial infill drilling

completed at Joaquin confirmed historical mineralization and highlight previously under -

modelled high-grade zones with a highlight intercept of 522 g/t AuEq over 28 meters.

Figure 2: Plan view map of significant intercepts at Joaquin (historical and new) (Source: Unico quarterly activities report

dated July 30, 2025)

Metalla holds a 2.0% NSR royalty on Joaquin.

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San Luis

On July 29, 2025, Highlander Silver Corporation (“Highlander”) reported assays results testing a

conceptual open pit target called Bonita at San Luis. All seven holes intersected high grade

broad mineralization with highlight intercepts of 4.92 g/t gold and 16.52 g/t silver over 23.1 meters

and 3.7 g/t gold and 17.47 g/t silver over 14.5 meters. Highlander plans to expand the drill program

to two drill rigs upon receipt of regulatory approval.

Metalla holds a 1.0% NSR royalty on San Luis.

Fifteen Mile Stream

On July 24, 2025, St Barbara Limited (“St Barbara”) reported that the prefeasibility study for the 15-

Mile processing hub remains on track for completion in March 2026. The study is evaluating the

integration of Cochrane Hill into the previously proposed 15-Mile and Beaver Dam combination,

with an increased throughput scenario. St Barbara a lso highlighted continued improvements in

the resource development and permitting environment in Nova Scotia, where gold was added

to the list of Provincial Strategic Minerals.

Metalla holds a 1.0% NSR royalty on the Fifteen Mile Stream project, and 3.0% NSR royalty on the

Plenty and Seloam Brook deposits.

Fosterville

On July 30, 2025, Agnico Eagle Mines Ltd. (“Agnico”) reported that Fosterville produced 49.6 Koz

of gold in the second quarter of 2025, higher than planned due to higher grades at Harrier and a

change in mining sequence at Phoenix.

Metalla holds a 2.5% GVR royalty on the northern and southern extensions of the Fosterville mining

license and other areas in the land package which are not currently in production.

Copper World

On August 13, 2025, Hudbay Minerals Inc. (“ Hudbay”) announced a $600 million strategic

investment from Mitsubishi Corporation (“Mitsubishi”) for a 30% joint venture interest in Copper

World. The contribution from Mitsubishi will consist of $420 million upon closing and a $180 million

matching contribution payable no later than 18 months following the closing. Mitsubishi will

contribute 30% of the ongoing costs beginning August 31, 2025, and will participate in the funding

of the definitive feasibility study as well as the final project design, project financing, and project

construction for Copper World. The joint venture is expe cted to close in late 2025 or early 2026.

Hudbay stated that this transaction secures a premier long-term strategic partner and validates

the longer term value of Copper World as a world-class copper asset.

On June 11, 2025, Copper World Inc., a wholly -owned subsidiary of Hudbay announced the

selection of several companies to conduct feasibility studies and drive early stage project

development for Copper World, a milestone that marks the continued advancement of the fully

permitted mine. Hudbay stated that this development is structured under an integrated project

delivery model which fosters more efficient planning, enhances risk mitigation, and streamlines