Seabridge Gold Reports Maiden Snip North Resource Estimate at Its Iskut Project in B.C.’s Golden Triangle

Press Release

April 15, 2026

Iskut Project Being Renamed Bronson Corridor Project

Toronto, Ontario– – Seabridge Gold (TSX: SEA) (NYSE: SA) (“Seabridge” or the “Company”) reports today its first mineral resource estimate (“MRE”) for the Snip North deposit at its 100% owned Iskut Project in the Golden Triangle Area of northwestern British Columbia. The maiden inferred mineral resource at Snip North totals 9.2 million ounces of gold, 28.3 million ounces of silver and 923 million pounds of copper (605.7 million tonnes at 0.47 g/T gold, 0.07% copper and 1.5 g/T silver). The resource remains open in several directions.

In addition, the Iskut Project is being renamed for the mineralized belt along which the Project’s deposits lie; it will now be known as the Bronson Corridor Project.

Snip North is the second deposit discovered at the Bronson Corridor Project. The other deposit at Bronson Corridor is Bronson Slope. For information on the Bronson Slope deposit see here.

Resources at Snip North were principally constructed based on exploration diamond drilling by the Company between 2023 and 2025.  Mineralized domains and grade profiles are consistent with a significant magmatic-hydrothermal feature generated by a Cu-Au porphyry system, however that source intrusion has yet to be discovered.  The maiden MRE is restricted primarily to altered sedimentary-volcanoclastic wall rock.

Seabridge Chair and CEO Rudi Fronk commented: “We are excited to have accomplished our goal of a robust maiden resource for Snip North.  This resource estimate reminds us of our first estimate at KSM nearly 20 years ago. Although it is not yet a material part of our total resource holdings, there remains considerable upside for expansion and discovery of the intrusive. Our team will soon be back on the ground to refine and improve our understanding of this mineral resource and use that understanding to continue exploring the Project.”

Leading the estimation and geostatistical analysis was Wood Canada Limited (“Wood”) with Moose Mountain Technical Services (“MMTS”) providing mining constraints for the estimation and Tetra Tech Canada Inc. (“Tetra Tech”) providing metallurgical recovery testing and projections.  All three groups are independent of Seabridge Gold.

The mineral resource estimation utilizes 58 verified diamond drill holes completed between 2006 and 2025.  A total of 47 holes were drilled by Seabridge Gold and 11 holes by previous operators.  These drill holes yielded 27,935 unique assays intervals that were composited to 5-meter lengths. Initial composite assays were evaluated by probability distribution and decile analysis to establish composite grade outliers, before construction of 10x10x10 meter blocks.  Outlier estimation restrictions were instituted by domain, and the influence of the grade outliers was significantly reduced in the subsequent estimations.  Based on an analysis of variography, the block grades were estimated by multi-pass ordinary kriging.

The MRE is constrained by an open pit and a long hole open stope underground shape below the constraining pit. These constraining mining shapes are preliminary and require more work to refine initial environmental and development considerations.  Additional drilling is expected to provide results that may shift the center of the deposit, changing future constraining shapes and development concepts.

Snip North Mineral Resource Estimate

Indicated
	Tonnes (000)	Gold		Copper		Silver		Molybdenum
		Grade (g/t)	Ounces (millions)	Grade (%)	Pounds (millions)	Grade (g/t)	Ounces (millions)	Grade (ppm)	Pounds (millions)
Open Pit	27,649	0.38	0.3	0.06	36	1.3	1.1	66	4
Inferred
	Tonnes (000)	Gold		Copper		Silver		Molybdenum
		Grade (g/t)	Ounces (millions)	Grade (%)	Pounds (millions)	Grade (g/t)	Ounces (millions)	Grade (ppm)	Pounds (millions)
Open Pit	301,375	0.33	3.2	0.05	351	1.2	11.9	57	38
Underground	304,281	0.61	6.0	0.09	572	1.7	16.5	66	44
Total Inferred	605,656	0.47	9.2	0.07	923	1.5	28.3	62	82

Notes:

1. The effective date for the Mineral Resource Estimate for Snip North is April 8, 2026.
2. The Mineral Resource Estimates have been verified and endorsed by Henry Kim P.Geo., an independent Qualified Person.
3. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. It is reasonably expected that the majority of Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration.
4. Mineral Resources were prepared in accordance with CIM Definition Standards for Mineral Resources and Mineral Reserves (May 10, 2014) and CIM Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines (Nov 29, 2019).
5. Mineral Resources were constrained within mineable shapes depending on the assumed mining methods.
6. Net Smelter Return (NSR) cut-off is $14.51/t for the Open Pit based on estimated operating cost and using the following assumptions: metal prices of US$5.05/lb Cu, US$2875/oz Au, US$34.50/oz Ag, US$23/lbs Mo and exchange rate of 0.73 US$ per 1.00 Cdn$; Copper concentrate terms are 90% payable Cu; 97% payable Au; 91% payable Ag. Offsite costs (smelting, refining, transport, and insurance) are $218 per tonne of concentrate; doré terms are $3/oz Au offsite costs (refining, transport and insurance), 99.8% Au and Ag payable; and variable overall metallurgical recoveries of Cu (45 to 95.5%), Au (35 to 82%), Ag (25 to 55%) and Mo (0 to 68%) based on their head grades.
7. The Mineral Resources have been constrained by “reasonable prospects of eventual economic extraction” mining shapes using assumptions: metal prices 140% higher than the NSR assumptions including US$4025/oz Au, US$7.1/lb Cu, US$48.3/oz Ag, and US$ 32.2/lb Mo with a currency exchange rate of 0.73 US$ per 1.00 Cdn$, pit slope of 45 degrees, open pit mining cost of $2.50/t, underground mining cost of $40/t for long hole open stope mining;
8. “Moly” = “Molybdenum”
9. Numbers may not add due to rounding.
10. Unless noted otherwise, dollars reported herein are Canadian dollars.

The mineralization at Snip North is hosted by sedimentary and volcanoclastic rocks of the Triassic Stuhini Group.  Metal grades are disseminated in stockwork veins and replacements of calcareous interbeds.  Extensive and intensive potassic alteration of these rocks is characterized by biotite and K-feldspar.  On the west side of the system, muscovite-quartz-pyrite dominates and near the central part of the zone overprints the potassic alteration.  Bounding the north and south sides of the zone are fractured and sheared areas that display very little off set.  The system plunges to the north-northwest.

The contents of this release have been reviewed and approved by Henry Kim, P.Geo., Principal Resource Geologist, Wood Canada Limited. Data verification by Henry Kim included comparison of the data to the original source documents, review of the QAQC program, and site visit during Aug 8-12, 2025, that involved inspection and re-logging of existing drill cores which concluded that the data are suitable to support mineral resource estimates.

Seabridge holds a 100% interest in several North American gold projects. Seabridge’s principal assets, the KSM project, and its Bronson Corridor project are in British Columbia, Canada’s “Golden Triangle”, the Courageous Lake project is in Canada’s Northwest Territories, the Snowstorm project in the Getchell Gold Belt of Northern Nevada and the 3 Aces project set in the Yukon Territory. A full breakdown of Seabridge’s mineral reserves and mineral resources by category can be found on the Company’s website at http://www.seabridgegold.com.

Neither the Toronto Stock Exchange, New York Stock Exchange, nor their Regulation Services Providers accepts responsibility for the adequacy or accuracy of this release.

Cautionary note to U.S. Investors concerning estimates of Mineral Reserves and Mineral Resources

All mineral resource estimates reported by Seabridge were estimated in accordance with the Canadian National Instrument 43-101 and the Canadian Institute of Mining, Metallurgy and Petroleum (“CIM”) Definition Standards (May 10, 2014). Since 2021 the U.S. Securities and Exchange Commission (“SEC”) recognizes estimates of “measured mineral resources,” “indicated mineral resources” and “inferred mineral resources” and uses new definitions of “proven mineral reserves” and “probable mineral reserves” and the supporting mining studies that are substantially similar to the corresponding CIM Definition Standards. However, the CIM Definition Standards differ from the requirements applicable to US domestic issuers. Further, “inferred mineral resources” are that part of a mineral resource for which quantity and grade are estimated on the basis of limited geologic evidence and sampling. Mineral resources which are not mineral reserves do not have demonstrated economic viability.

ON BEHALF OF THE BOARD
“Rudi Fronk”
Chair & C.E.O.

For further information please contact:
Rudi P. Fronk, Chair and C.E.O.
Tel: (416) 367-9292   •  Fax: (416) 367-2711
Email:  info@seabridgegold.com

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