Anteros Completes 3D Modelling and Identifies New Critical Mineral Targets at Havens Steady VMS Deposit, Newfoundland - March 27, 2025

Anteros Completes 3D Modelling and Iden�fies New Cri�cal Mineral Targets at Havens Steady VMS Deposit, Newfoundland

St. John’s, Newfoundland and Labrador, March 27, 2025 – Anteros Metals Inc. (CSE:ANT) (“Anteros” or the “Company”) is pleased to announce the comple�on of 3D geological modelling of its 100% owned, road-accessible Havens Steady VMS Property (the “Property”) in central Newfoundland. The Property is located approximately 40 kilometres southeast of Buchans and 17 kilometres from the past-producing Duck Pond Mine. The inaugural 3D model integrates over 8,000 metres of historical drilling, surface geochemistry, and geophysical data into a unified geological framework. Interpreta�on was supported by AI-assisted workflows to enhance target confidence and reduce interpre�ve bias. The model defines a laterally extensive polymetallic volcanogenic massive sulphide (“VMS”) system characterized by zinclead-silver ± copper-gold mineraliza�on. It confirms a steeply southeast-dipping mineralized zone trending 057°, with over 700 metres of drilled strike length along the main mineralized zone (“MMZ”), as depicted in Figure 1, and iden�fies mul�ple untested vectors remaining open along strike and at depth.

KEY TARGETING HIGHLIGHTS:

• Copper-Rich Southwestern Feeder Zone – A newly delineated zone of copper-enrichment supported by elevated Cu:Pb+Zn ra�os, silica-chlorite altera�on, and historic drill intercepts may represent a vent-proximal feeder and remains underexplored.
• Northeast Extension of the MMZ – Geophysical trends, soil geochemistry, and altera�on vectors indicate strong poten�al for mineraliza�on northeast of the current drill coverage.
• Untested Pyri�c Footwall Target – Pyrite-rich lithologies east of the MMZ, associated with structural and geochemical indicators, may reflect another feeder or deeper mineraliza�on.
• Shallow Infill Drilling Opportuni�es – Gaps in data within the main mineralized horizon, par�cularly in areas with shallow overburden, provide cost effec�ve targets for near-surface resource defini�on.
• New Surface Access – Recent �mber harves�ng has improved access to mul�ple target areas, enabling inaugural trenching and low-cost grade verifica�on.
• Overlapping Anomalies – Coincident VLF conductors, magne�c highs, and geochemical soil anomalies that correlate with known mineraliza�on also support extensions along strike.
• Scalable System in a Proven Cri�cal Mineral District – The system remains open along strike and at depth, and is situated with polymetallic (Zn-Pb-Ag ± Cu-Au) mineraliza�on consistent with cri�cal mineral designa�on and regional VMS analogues.

Figure 1: Havens Steady Main Mineralized Zone (modelled in red), looking north-northeast

“Comple�on of this model is a significant milestone for Anteros and provides a modern pla�orm for explora�on decision-making,” said Trumbull Fisher, CEO. “Our team now has the tools to efficiently target high-priority zones including the copper-rich southwestern extension and newly iden�fied anomalies to the northeast.”

NEXT STEPS

Anteros plans to complete field valida�on in Q2 2025, followed by a focused diamond drilling campaign expected to commence in Q3 2025, with ini�al targets focused on copper-rich vectors including northeast extensions. The property is fully permited for diamond drilling and the Company plans to capitalize on government cri�cal metal explora�on grants to bolster its funded 2025 explora�on program.

ABOUT THE PROPERTY

The Havens Steady VMS Property lies within the Storm Brook Forma�on of the Red Cross Group in the Exploits Subzone of the Dunnage Zone — a prolific metallogenic belt in central Newfoundland. The Property benefits from exis�ng road infrastructure and proximity to hydroelectric power. The region hosts world class VMS deposits such as the past-producing Duck Pond Mine. The Company cau�ons

ANTEROS METALS – MAR 27, 2025 2

that mineraliza�on hosted on adjacent and/or nearby proper�es is not necessarily indica�ve of mineraliza�on on the Property.

Since acquiring the Property in January 2024, Anteros has performed comprehensive digital compila�on and modelling of historical explora�on data. Compila�on confirmed that previous geophysical work, including airborne electromagne�cs, iden�fied mul�ple conduc�ve anomalies consistent with the presence of sulfide mineraliza�on. Addi�onally, historic drill programs have outlined mul�ple zones of high-grade zinc, lead, silver, and copper mineraliza�on demonstrated by the presence of sphalerite and galena with bornite and chalcopyrite in copper-rich zones. The known deposit area has a strike length of at least 1,000 metres and historic drilling shows mineraliza�on extending to over 800 metres below surface. For more informa�on on the Property, please visit Projects

• Havens Steady on the Company webpage: www.anterosmetals.com/havens-steady.

QUALIFIED PERSON

The technical content of this news release has been reviewed and approved by Jesse R. Halle, P.Geo., an independent Qualified Person as defined by Na�onal Instrument 43-101 – Standards of Disclosure for Mineral Projects.

ABOUT ANTEROS METALS INC.

Anteros is a mul�mineral junior mining company using data science to target and acquire highly prospec�ve deposits for explora�on and development throughout Newfoundland and Labrador. The Company is currently focused on advancing four key projects across diverse commodi�es and development horizons. Immediate plans for their flagship Knob Lake Property include bringing the historical Fe-Mn Mineral Resource Es�mate into current status as well as commencing baseline environmental and feasibility studies.

For further informa�on please contact or visit:

Email: [email protected] | Phone: +1-709-769-1151 Web: www.anterosmetals.com | Social: @anterosmetals

On behalf of the Board of Directors,

Chris Morrison Director

Email: [email protected] | Phone: +1-709-725-6520 Web: www.anterosmetals.com/contact

16 Forest Road, Suite 200, St. John’s, NL, Canada A1X 2B9

ANTEROS METALS – MAR 27, 2025 3

Cau�onary Statement Regarding Forward-Looking Informa�on

This news release may contain "forward-looking informa�on" and "forward-looking statements" within the meaning of applicable Canadian securi�es legisla�on. All informa�on contained herein that is not historical in nature may cons�tute forward-looking informa�on. Forward-looking statements herein include but are not limited to statements rela�ng to the prospects for development of the Company's mineral proper�es, and are necessarily based upon a number of assump�ons that, while considered reasonable by management, are inherently subject to business, market and economic risks, uncertain�es and con�ngencies that may cause actual results, performance or achievements to be materially different from those expressed or implied by forward looking statements. Except as required by law, the Company disclaims any obliga�on to update or revise any forward-looking statements. Readers are cau�oned not to put undue reliance on these forward-looking statements.

ANTEROS METALS – MAR 27, 2025 4