Westhaven Extends High-Grade Gold and Silver Mineralization Below the South Zone Deposit, Including 10.04m Grading 12.18 g/t Au & 103 g/t Ag, Shovelnose Gold Property, Southern British Columbia

Westhaven Gold Corp. (WHN) has released the fifth batch of assay results from its ongoing 35,000m South Zone resource infill program. The initiative is now more than 76% complete, with 85 holes totaling 26,581m drilled across four active rigs.

The latest data includes results from six additional infill holes, with reported intervals measured downhole and estimated true widths calculated at 70-80%. Assay intervals were selected based on a cutoff of at least 2m using a 1 g/t Au threshold with no more than 3m of contiguous internal dilution, or intervals less than 2m containing a sample exceeding 10 g/t Au. One table note indicates an interval includes 4.10 contiguous metres below 1 g/t Au, which appears to exceed the stated 3m dilution rule, though the specific interval to which this applies is not fully clear in the provided text.

Notable intercepts include SNR26-117, which returned 10.04m grading 12.18 g/t Au and 103 g/t Ag, described as extending mineralization below the deepest stopes in the 2025 PEA. Another significant interval, SNR26-110, returned 37.34m grading 6.24 g/t Au and 55 g/t Ag, confirming thick mineralization at the southeastern deposit margin.

Westhaven Gold Corp. (WHN) released infill and resource-definition drilling results rather than a discovery hole or major step-out. The company noted that financial context is prior-period and provided separately, as this is not an earnings release.

Against the embedded South Zone resource grade of 6.1 g/t Au, the results showed specific outcomes. - SNR26-110 confirms resource continuity at grade. - SNR26-117 is higher grade but needs follow-up to show a meaningful resource expansion below PEA stopes.

The stock had already re-rated into the C$0.38-C$0.40 area before this release, so the market was pricing a generally positive drill program. For an infill program, confirming resource grade is a positive but routine event; it does not yet change tonnes, mine life, or NAV. The Dundee earn-in provides funding and de-risks execution, but the release itself is not transformational.

Westhaven Gold Corp. (TSX-V: WHN, OTCQB: WTHVF, Frankfurt: 1W5) is a pre-revenue gold-silver exploration and development company controlling approximately 60,263 hectares across four properties in the Spences Bridge Gold Belt of southern British Columbia. The company’s most advanced asset is the Shovelnose project, which features a 2025 preliminary economic assessment (PEA) base case for an 11-year underground mine. This plan projects annual production of approximately 56,000 ounces of gold and 313,000 ounces of silver.

The PEA assumes gold at US$2,400/oz, silver at US$28/oz, and an exchange rate of 0.72 CAD/USD. Under these conditions, the project yields an after-tax net present value (NPV) at 6% of C$454 million and an internal rate of return (IRR) of 43.2%, with an all-in sustaining cost (AISC) of US$836/oz AuEq. Mineral resource estimates from the company’s presentation include an indicated resource of 3,767 kilotonnes at 6.0 g/t Au and 31 g/t Ag, containing 737,000 ounces of gold and 3,825,000 ounces of silver. An inferred resource of 3,198 kilotonnes at 3.6 g/t Au and 28 g/t Ag contains 371,000 ounces of gold and 2,981,000 ounces of silver.

Dundee Corporation holds an option to earn up to a 60% interest in four Spences Bridge Gold Belt properties through staged expenditures totaling up to C$85 million, with a Phase 1 minimum commitment of C$30 million. Westhaven’s financials reflect no revenue and recurring losses, accompanied by a going-concern flag. The company reported a net loss of C$1.27 million for the first quarter of 2026, with cash holdings of C$3.37 million as of March 31, 2026.