Kitsault Valley’s 93% Resource Upgrade vs a 33% Share Price Fall

A 93% uplift in a silver resource sounds like a headline worth celebrating. Yet Contango Silver and Gold’s share price has fallen roughly 33% year-to-date, even as the company just confirmed its Kitsault Valley silver resource now holds 89.55 million ounces of silver-equivalent in the higher-confidence Indicated category.

That gap between the geological story and the market’s verdict is the question worth answering. The September 2026 mineral resource estimate is the most significant milestone Contango has published for the project, establishing Kitsault as one of the larger Canadian silver assets at the resource stage, with deposits still open at depth and along strike and roughly 98% of the project area yet to be touched by a drill bit.

At the same time, the estimate is a resource-only document. No reserves, no economics, no mine plan. The distance between those two facts is what you need to understand before forming a view.

This piece gives you a framework for evaluating what the numbers actually represent, where the upside case rests, and what the remaining study milestones mean for the timeline before any economic reality test arrives. The aim is an opinion grounded in the data, not the headline.

What the 89.55-million-ounce estimate actually says, and what it does not

Start with the raw figures. The Indicated category holds 7.66 Mt at 363 g/t silver equivalent, containing 89.55 Moz of silver-equivalent: specifically 58.7 Moz of silver, 394,700 oz of gold, plus copper, lead and zinc. The Inferred category adds 6.31 Mt at 320 g/t AgEq, for a further 64.92 Moz AgEq, of which 22.8 Moz is silver and 620,800 oz is gold.

The estimate carries an effective date of 11 September 2026, was announced on 22 September 2026, and was filed under the US SEC’s Subpart 1300 of Regulation S-K (S-K 1300). It covers eight resource deposits across the Kitsault Valley project in northwest British Columbia, underpinned by roughly 1,877 drill holes totalling over 433,000 metres, with 1,454 holes and 328,638 metres assigned directly to the eight deposits.

Now strip away the inflation. The Indicated and Inferred figures are not interchangeable. Indicated is the higher-confidence category, the one that can feed into a future economic study. Inferred is lower confidence and cannot be blended into the same total for economic purposes.

This is the distinction that matters most. Investors who add the two together to reach a headline of roughly 154 Moz are working with a number that overstates the project’s economic-study-ready asset base. The figure that counts for any future valuation exercise is the 89.55 Moz sitting in Indicated.

The distinction between Indicated and Inferred resource classification categories is the single most consequential filter investors apply when comparing resource-stage silver projects; blending the two into a combined headline figure produces a number with no economic study utility.

The deposits carry a cut-off grade of 132 g/t AgEq for seven of the eight, with South Reef retaining a historical 2.0 g/t AuEq baseline.

What the document does not contain is as important as what it does:

• No mineral reserves
• No net present value (NPV)
• No internal rate of return (IRR)
• No capital expenditure estimate
• No mine schedule

Knowing precisely which category the ounces sit in, and what is still absent from the study pipeline, is the first filter for any comparison against other silver assets.

Why the 93% increase reflects geology, not just drilling metres

A 93% jump in Indicated resources invites an obvious question: did the company simply drill more holes? The answer is more interesting than that, and it matters for how durable the number is likely to be.

The 93.1% increase over the prior 2023 estimate comes primarily from a substantially revised geological interpretation across both the Dolly Varden and Homestake systems. The drilling density of roughly 1,877 holes across more than 433,000 metres gave Contango the data volume to re-model the deposits, but the step-change came from re-logging structure and continuity, not from meterage alone.

The logic of that re-interpretation shows up in the grade continuity. In-deposit intercepts referenced in original coverage illustrate the point.

A single intercept of 66 metres grading 170 g/t silver demonstrates the kind of grade continuity that allows previously uncertain material to be modelled with higher confidence.

Here is the signal most investors miss. The Inferred category was reduced, and that reduction is a positive, not a loss. Material did not disappear; it was reclassified upward into the higher-confidence Indicated category as the re-modelled geology and denser data improved continuity confidence.

Indicated resource upgrades at the resource-stage attract different investor responses depending on the geological interpretation underpinning them: upgrades driven by reclassification from Inferred, as opposed to new drilling alone, tend to signal more durable confidence in the deposit model because the data density required for the confidence threshold has already been demonstrated.

A resource upgrade built on geological re-interpretation rather than optimistic interpolation is more durable. It reduces the risk of future resource contraction when the next re-modelling exercise runs, which is the kind of stability that compounds in value as later studies build on the base.

What the Leapfrog migration means for future estimate speed

Contango migrated its resource model from the Gems software platform into Leapfrog, enabling a more detailed geological model and, in the company’s framing, faster future updates. The practical implication is a shorter lag between new drilling and a refreshed resource figure, which directly supports the targeted first-half 2027 estimate update.

For you, that means less waiting between catalysts. A faster modelling workflow turns each drilling season into an updated resource figure more quickly, tightening the feedback loop between exploration spend and a quantifiable result.

The exploration upside case and its honest limits

The upside argument at Kitsault starts with a single striking number. Management estimates only about 2% of the total project area has been explored to date.

Build from there. The deposits remain open at depth, having not been drill-tested below 300 metres vertically, and they remain open along strike. The entire 2026 drilling programme is excluded from the 11 September 2026 effective-date estimate, which means the current figure is a lagging snapshot rather than the full picture.

The forward schedule is designed to close that gap. The H1 2027 update will begin to quantify what the 2026 programme found, and an Initial Assessment under S-K 1300, targeted for later in 2027, will introduce the first economic metrics the project has ever carried.

Now apply the countervailing forces, because the 2% figure is a ceiling on potential, not a floor under value. Kitsault sits in northwest British Columbia’s Golden Triangle, a region that industry commentary consistently associates with infrastructure deficits, lengthy permitting timelines, and complex environmental assessments. None of that is addressed by a resource-stage document.

British Columbia Indigenous consultation requirements apply to mining projects across the province, including those in the northwest Golden Triangle, and represent a material component of the permitting timeline that sits between any completed feasibility study and a formal production decision.

The phases still standing between the current estimate and any production decision are numerous:

1. H1 2027 MRE update
2. Initial Assessment, later 2027
3. Pre-Feasibility Study
4. Feasibility Study
5. Permitting
6. Construction

So the honest reading holds two truths at once. The untested ground is real and quantifiable, and the time and capital required to convert geological upside into economic reality are measured in years and in successive capital commitments, not in drill metres alone.

How the market is pricing the gap between ounces and economics

Here is the puzzle. A 93% Indicated resource increase and a 32-36% year-to-date share price decline are sitting at the same company at the same moment.

93% resource increase, 33% share price decline.

That is not a contradiction to be explained away. It is the market pricing a resource-stage project on the probability-weighted path to cashflow, and for Kitsault that path is long.

As of late September and early October 2026, Contango carried a market capitalisation of roughly US$550-565 million, with the share price around US$16.57-US$16.97, down approximately 32-36% year-to-date across some 33.2-33.4 million shares outstanding. The resource upgrade landed inside that decline, not before it.

The structural reasons resource-only stories get discounted are consistent across the sector:

Resource-stage valuation discounting follows consistent structural patterns across the sector: long time horizons before cashflow, multi-phase capital dilution risk, and the absence of economic metrics each widen the gap between what geology implies and what the market will pay for it today.

• Long time horizons before any economic metric exists
• Capital dilution risk across multiple study phases
• Commodity cycle uncertainty over a multi-year timeline
• No NPV, IRR, capex, or mine schedule in the current document
• Mining method uncertainty, with no defined dilution assumptions or processing route

That last point deserves weight. With no mine plan declared, there is no confirmation of whether grade and geometry will favour open-pit or underground development, and the difference carries material cost implications. An underground scenario would reshape the economics the Initial Assessment eventually presents.

What this tells you is that the share price decline is not a verdict on the geology. It is rational discounting of a long-dated asset, and the distinction matters. Investors who understand it are better placed to judge whether the current valuation is a risk-adjusted opportunity or a justified discount, rather than reacting to the headline in either direction.

Where Kitsault sits in the development arc, and what to watch next

The through-line is now clear. Kitsault Valley is a credibly large silver-gold resource in a well-regarded jurisdiction, carrying genuine exploration upside, but it is firmly at the resource stage, with the Initial Assessment standing as the next meaningful economic reality test.

Three variables will determine whether the story strengthens or plateaus over the next 12-18 months:

Applying an exploration due diligence framework to a resource-stage project means holding geological confidence, study pipeline completeness, and balance sheet runway in the same analytical frame; any one of those variables in isolation produces an incomplete picture of where a project sits on the risk-return curve.

• The H1 2027 MRE update: does the 2026 drilling materially expand the resource base?
• The later-2027 Initial Assessment: do the first economic metrics support a plausible mine case at current or near-current metal prices?
• Silver price trajectory: does the commodity backdrop stay supportive while study costs are incurred?

Those two documents are the ones worth waiting for. They are what will tell you whether the geological story has economic legs, in either direction.

One factor separates Kitsault from similarly staged projects, and it belongs in the frame.

Contango held approximately US$90-100 million in cash as of around September 2025, alongside free cash flow from the Manh Choh joint venture. That provides a funded pathway to the next study phases without the immediate dilution pressure that forces competing developers into capital raises at the worst possible moment.

A resource upgrade without an economic framework leaves you with a geological asset and an open question about value. The H1 2027 update and the later-2027 Initial Assessment are the milestones that start to answer it.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results, and financial projections are subject to market conditions and various risk factors. Forward-looking statements regarding study timelines and resource figures are speculative and subject to change based on market developments and company performance.