Mr. Brett Heath reports

METALLA INCREASES ITS COTE & GOSSElin roYALTY TO 1.5% AND PROVIDES PORTFOLIO UPDATES

Metalla Royalty & Streaming Ltd. has completed the acquisition of the remaining 0.15-per-cent interest in a net smelter return (NSR) royalty on a portion of the Cote gold mine and all of the Gosselin project, owned by Iamgold Corp. (New York Stock Exchange: IAG) (Toronto Stock Exchange: IMG) and Sumitomo Metal Mining Co. Ltd., and now holds a consolidated 1.5 per cent of the Cote/Gosselin royalty.

"The additional 0.15 per cent of the Cote/Gosselin royalty further strengthens our position on one of the most significant gold assets in Canada," commented Brett Heath, chief executive officer of Metalla. "By increasing our royalty, we have enhanced our leverage to one of the premier gold assets globally. Iamgold continues to demonstrate the scale and quality of the Cote-Gosselin system. We expect this acquisition to further bolster Metalla's portfolio as Iamgold expects to integrate Gosselin into the mine plan and resources continue to expand."

Cote/Gosselin (1.5-per-cent NSR royalty)

On Oct. 31, 2025, Metalla completed the acquisition of the remaining 0.15-per-cent interest in the Cote/Gosselin royalty for total consideration of $3.4-million in cash from an arm's-length seller. The acquisition increases Metalla's total royalty percentage to 1.5 per cent.

The Cote mine reached commercial production in August, 2024, after pouring its first gold in March, 2024, and has achieved nameplate processing capacity of 36,000 tonnes per day. With plans to integrate the Gosselin deposit into an updated mine plan and boost overall throughput, Cote/Gosselin is positioned to become one of Canada's largest gold-producing complexes.

Iamgold disclosed on Aug. 7, 2025, that it plans to drill a total of 45,000 metres at Gosselin in 2025 and expects results from the 2024 and 2025 Gosselin exploration programs to be incorporated into an updated mineral reserve and resource estimate in 2026, as well as an updated technical report, considering a larger-scale operation with a conceptual plan targeting both the Cote and Gosselin zones. Iamgold expects the updated technical report to be completed by year-end 2026.

Asset updates

• La Guitarra -- expansion plans under way to increase processing capacity to approximately 1,500 tonnes per day by Q3 2027 and the commencement of a district-wide exploration program;
• La Parrilla -- rehabilitation plans under way supported by offtake financing from Samsung;
• Endeavor -- recommencement of mining operations following fatal incident at Endeavor mine and discovery of new massive sulphide zone at the Carpark prospect;
• San Luis -- drilling confirms significant extensions of the Bonita vein system;
• Wharf - 2025 production guidance at Wharf increased to 93,000 to 103,000 ounces gold.

La Guitarra (2.0-per-cent NSR royalty)

Metalla holds a 2.0-per-cent NSR royalty on Sierra Madre Gold & Silver Ltd.'s La Guitarra silver-gold mine complex in the Temascaltepec mining district, Mexico.

On Sept. 8, 2025, Sierra Madre outlined a two-stage expansion plan at La Guitarra. The planned expansions would increase the site's nameplate processing capacity from 500 tonnes per day (tpd) to approximately 750 to 800 tpd by Q2 2026. Sierra Madre then intends to further increase capacity to roughly 1,200 to 1,500 tpd by Q3 2027 through the construction of a new dry-stack tailings facility and the installation of a second crushing circuit.

On Oct. 23, 2025, Sierra Madre announced a $3.5-million exploration program focused on the East district of the La Guitarra mine complex. The program will begin with drill-target definition through mapping and surveying, including work around the historic El Rincon mine, followed by a 20,000-to-25,000-metre drill campaign.

For more information, please view the Sierra Madre's Sept. 8, 2025, press release and Sierra Madre's Oct. 23, 2025, press release.

La Parrilla (2.0-per-cent NSR royalty)

Metalla holds a 2.0-per-cent NSR royalty interest on Silver Storm Mining Ltd.'s La Parrilla mine complex in Durango, Mexico.

On Oct. 21, 2025, Silver Storm reported that rehabilitation activities had commenced at La Parrilla, with engineers engaged and mobilized, long-lead items ordered for the sulphide circuit expansion to 1,250 tonnes per day, and SRK Consulting retained to review the restart plan.

The president and chief executive officer of Silver Storm stated: "With the existing infrastructure in place and recent financings completed, we are taking decisive steps in respect of the Silver Storm's objective of bringing the historic La Parrilla back into production and creating value for our shareholders and the communities of Durango. Rehabilitation and preparation activities will take seven to nine months, and subject to further technical evaluations, we could target the potential restart of operations as early as the second quarter of 2026."

For more information, please view the Silver Storm's Oct. 10, 2025, press release and Silver Storm's Oct. 21, 2025, press release.

Endeavor (4.0-per-cent NSR royalty)

Metalla holds a 4.0-per-cent NSR royalty interest on Polymetals Resources Ltd.'s Endeavor mine in Cobar, Australia.

On Oct. 31, 2025, Polymetals provided an update in relation to a fatal incident that occurred at Endeavor on Oct. 28, 2025, that resulted in all mining and surface operations being suspended pending completion of an investigation into its cause. Polymetals has announced plans to take a staged approach to recommencing operations at Endeavor with exploration drilling and concentrate transport expected to commence next week. Personnel are expected to return to work on Nov. 5, 2025, with the progressive resumption of mining and processing activities.

Metalla wishes to extend our deepest condolences to the families and all those impacted by the recent tragic events in Cobar, Australia.

On Oct. 23, 2025, Polymetals reported the discovery of a new zone of massive sulphides south of the Endeavor mine in the Carpark prospect. Polymetals stated that visual evidence from the drill holes completed support the likely presence of a significant mineralized structure in the area.

For more information, please view the Polymetals' Oct. 23, 2025, press release and Polymetals' Oct. 31 2025, press release.

San Luis (1.0-per-cent NSR royalty)

Metalla holds a 1.0-per-cent NSR royalty on Highlander Silver's San Luis gold-silver project in central Peru.

On Sept. 16, 2025, Highlander reported results of step out drilling to the southeast of prior drilling at the Bonita open pit target with high grade intercepts of 7.43 g/t gold and 16.45 g/t silver over 24.8 metres and 3.42 g/t gold and 16.93 g/t silver over 40.4 metres.

On Oct. 6, 2025, Highlander reported drill results from the expanding Bonita drill program with the discovery of a new zone called Kusy. The highlight intercept from Kusy returned 15.56 g/t gold and 74.49 g/t silver over 23.6 metres.

For more information, please view the Highlander Sept 16, 2025, press release and Highlander Oct. 6, 2025, press release.

Wharf (1.0-per-cent royalty)

Metalla holds a 1.0-per-cent GVR royalty on Coeur Mining Inc.'s Wharf mine.

On Oct. 29, 2025, Coeur increased its full year production guidance for 2025 at Wharf to 93,000 to 103,000 ounces gold, reflecting strong year-to-date performance and higher expected grades in the fourth quarter.

Exploration expenditures at Wharf for the third quarter were $3-million with expansion and infill drilling programs at Juno completed during the quarter.

For more information, please view the Coeur Mining Oct. 29, 2025, press release.

Qualified person

The technical information contained in this news release has been reviewed and approved by Charles Beaudry, geologist, MSc, member of the Association of Professional Geoscientists of Ontario and of the Ordre des Geologues du Quebec. Mr. Beaudry is a QP as defined in National Instrument 43-101 -- Standards of Disclosure for Mineral Projects.

About Metalla Royalty & Streaming Ltd.

Metalla provides shareholders with leveraged gold, silver and copper exposure by acquiring royalties and streams. The company's goal is to increase share value by accumulating a diversified portfolio of royalties and streams with attractive returns. The company's 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.

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