Hercules Metals Extends Southern Flats Copper Hit in Idaho

Hercules Metals (TSXV: BIG; US-OTC: BADEF) said it has extended its Southern Flats copper discovery in Idaho with drill hole HER-26-01, enlarging a target that may connect northward with the company's Leviathan porphyry system; the OTC listing traded at 0.92, down 1.13%, as of 17:41 GMT on Sept. 30, 2026.

Hercules Metals (TSXV: BIG; US-OTC: BADEF) has pushed the boundaries of its Southern Flats copper discovery in Idaho, reporting that drill hole HER-26-01 extended the mineralized footprint and enlarged a target the company believes may eventually join up with the Leviathan system to the north.

That last point is the one that matters most for how the market values the story. Southern Flats on its own is an early-stage copper target. Southern Flats as the southern extension of Leviathan is something else: a single, continuous porphyry system with a much longer strike length, and a project whose eventual scale is set by geology rather than by the boundaries of an initial discovery hole.

The extension was reported by The Northern Miner.

Why a possible link to Leviathan changes the arithmetic of the project

Porphyry copper deposits are large, relatively low-grade bodies of rock formed around ancient intrusions of magma. Their economics are unusual among metal deposits: grade per tonne is often modest, so value comes from tonnage, from consistency, and from the ability to move very large volumes of material at low unit cost. That makes continuity the single most valuable geological attribute a porphyry explorer can demonstrate.

Two separate zones, each requiring its own pit, its own waste rock handling and potentially its own haulage profile, are worth considerably less than one zone of the same combined size. If Hercules can show that the mineralization at Southern Flats and the Leviathan system to the north are parts of the same hydrothermal architecture, it collapses two exploration problems into one development concept. Step-out drilling of the kind HER-26-01 represents is precisely how that case gets built or falls apart — hole by hole, along the gap between the two.

It is worth being clear about what has and has not been established. The company has described the target as enlarged and the potential connection as something that may exist. A possible link is a drilling hypothesis, not a defined resource, and the distance between the two is measured in seasons of drilling and millions of dollars of expenditure.

Idaho's place in the American copper conversation

The location is not incidental. Copper has moved from an industrial-cycle metal to a strategic one, pulled by electrification, grid rebuilding, data centre construction and transport. New pounds are hard to come by: the discovery cycle is long, permitting is longer, and much of the world's undeveloped copper sits in jurisdictions where political risk is priced into every financing conversation.

Against that backdrop, a copper porphyry target in Idaho carries a premium that has little to do with its assay sheet. A domestic United States address means permitting inside a known legal framework, proximity to North American smelting and fabrication demand, and eligibility for the kind of policy attention now directed at critical-minerals supply chains. It also means a serious permitting timeline and a local stakeholder process that cannot be short-circuited, which is why investors in this part of the market tend to be underwriting optionality on a resource rather than a near-term mine.

How the shares are trading around the news

Hercules Metals carries a dual listing: its primary quote is on the TSX Venture Exchange under BIG, with a United States over-the-counter line under BADEF. As of the last trade at 17:41 GMT on Sept. 30, 2026, BADEF changed hands at 0.92, down 1.13% from the prior close of 0.93, inside a session range of 0.91 to 0.94.

That is a narrow band and a modest decline — the trading pattern of an OTC line in a junior explorer, where the domestic tape is thin and price discovery largely happens on the Canadian listing during Toronto hours. Investors reading the United States quote should keep two things in mind: the OTC price is a shadow of the TSXV market rather than the primary market itself, and currency translation sits between the two quotes.

For context on the broader market backdrop that day, the S&P 500 tracker (SPY) traded at $767.43, up 0.42%, and the Nasdaq 100 tracker (QQQ) at $743.18, up 0.71%, while the Dow 30 tracker (DIA) slipped 0.21% to $511.80. In other words, a risk-tolerant session for large-cap equities — the kind of tape in which a positive exploration update would normally find a receptive audience. That BADEF did not move materially higher says more about how junior exploration is valued than about the geology: step-out extensions rarely re-rate a stock the way a maiden discovery hole or a resource estimate does.

The next disclosures that will actually move the valuation

Several specific items will determine whether the Southern Flats extension becomes a scale story or stays a line item in a news release.

• Intercept detail. The grades, widths and downhole depths from HER-26-01, and how they compare with earlier Southern Flats and Leviathan holes, are the raw material for any continuity argument.
• Drilling in the gap. Holes sited between the two zones are the direct test of the connection hypothesis. Their results, positive or negative, are more informative than further step-outs at either end.
• Geophysics and alteration mapping. Porphyry systems leave large geophysical and alteration signatures. Whether those signatures are continuous across the gap is a cheaper early indicator than drilling.
• Financing and rig count. Junior explorers convert news into value only if they can fund the follow-up. Treasury position, the number of rigs turning and the length of the drill program set the pace of newsflow.
• A maiden resource. The moment tonnage and grade are formally estimated is usually the moment the market stops valuing a project on narrative.

What the update tells investors about the risk profile

The honest reading of an announcement like this is incremental. Hercules has made a discovery, is drilling around it, and has found that it continues in a direction that matters. That is how successful porphyry campaigns proceed, and it is also how many campaigns look shortly before they stall.

Anyone evaluating the shares should treat the extension as a reduction in one specific risk — that Southern Flats is an isolated, small-footprint occurrence — rather than as progress toward a mine. Copper porphyries reward patience with very long project lives when they work, and they consume exploration capital without result when they do not. The distinguishing evidence in this case is geological continuity between two zones, and only the drill bit can produce it.

Key facts

• US OTC quote: BADEF at 0.92, -1.13%, as of 17:41 GMT Sept. 30, 2026
• Listings: TSX Venture Exchange: BIG; US-OTC: BADEF
• Drill hole: HER-26-01, extending the Southern Flats copper discovery
• Scale question: Enlarged Southern Flats target may connect with the Leviathan system to the north

Frequently asked questions

What did Hercules Metals announce about Southern Flats?

Hercules Metals said it extended its Southern Flats copper discovery in Idaho on the strength of drill hole HER-26-01. The result enlarged the target area and raised the possibility that Southern Flats connects with the company's Leviathan system to the north, which would imply a single, larger mineralized system rather than two separate zones.

Where does Hercules Metals trade and under what symbols?

Hercules Metals is listed on the TSX Venture Exchange under the symbol BIG, with a secondary United States over-the-counter quote under BADEF. The TSXV line is the primary market and generally sets price discovery, while the OTC quote gives American investors access and reflects the Canadian price plus currency translation.

How did the shares react?

The United States OTC listing, BADEF, traded at 0.92 as of the last trade at 17:41 GMT on Sept. 30, 2026, down 1.13% from a prior close of 0.93, within a session range of 0.91 to 0.94. That is a narrow move, typical of a thinly traded OTC line in a junior exploration company.

Why would linking Southern Flats to Leviathan matter?

Porphyry copper deposits earn their economics from scale and continuity rather than high grade. One continuous system of a given size is generally more valuable than two separate zones of the same combined size, because it can be mined with a single pit, one waste-handling plan and shared infrastructure. Continuity is therefore the key exploration objective.

Does this mean Hercules has a defined copper resource?

No. The company described an extended discovery and an enlarged target, with a potential connection to Leviathan still a drilling hypothesis. A formal mineral resource estimate requires enough drill density to estimate tonnage and grade with confidence, and that milestone has not been reported here. The project remains at the exploration stage.

What should investors watch next?

The reported grades, widths and depths from HER-26-01; drilling placed in the gap between Southern Flats and Leviathan to test continuity directly; geophysical and alteration evidence across that gap; the company's treasury and rig count, which set the pace of newsflow; and ultimately any maiden resource estimate.

Sources

• Hercules extends Idaho copper discovery — Northern Miner

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