Key Highlights

● SSR Mining rebuilt its Balance Sheet after closing the roughly $1.49 billion sale of its 80% stake in the Çöpler mine in Türkiye, ending the second quarter of 2026 with $1.783 billion in cash and no long-term debt.

● NioCorp Developments remains a pre-revenue developer whose Elk Creek project carries an upfront Capital requirement near $1.85 billion, leaving its non-binding agreements with Lockheed Martin and Traxys as promising but unfunded until financing actually closes.

● Sigma Lithium delivered 35,000 tonnes of lithium concentrate in the second quarter of 2026, beating its own 33,000-tonne guidance, with all-in sustaining costs cited near $668 per tonne positioning it toward the low end of the global cost curve during a weak pricing environment.

● Aura Minerals, a genuinely operating gold, copper and silver producer rather than a pre-production explorer, reported full-year 2025 Revenue near $921.7 million alongside a reported net loss that investors should scrutinize given the company's dual-listed capital structure.

Gold and silver, niobium and scandium, lithium and primary aluminum: five very different Nasdaq-listed miners show why the materials complex is drawing fresh attention this September, and why the risks are as specific as the catalysts.

A Materials Moment Inside a Tech-Heavy Index

The Nasdaq Composite is best known for software and semiconductors, but tucked inside it is a small cluster of metals and materials companies whose fortunes turn on Commodity prices, government policy and mine-level execution rather than product cycles. As of mid-September 2026, five of them stand out: SSR Mining, NioCorp Developments, Sigma Lithium, Century Aluminum and Aura Minerals.

They span the risk spectrum, from a cash-rich gold and silver producer to a pre-construction critical-minerals developer. What links them is timing. Each is approaching a catalyst, a milestone or a policy decision that could reset expectations.

The Sector Backdrop for September 2026

These five companies occupy distinct corners of the materials world. SSR Mining (NASDAQ: SSRM) and Aura Minerals (NASDAQ: AUGO) are precious-metals producers. NioCorp Developments (NASDAQ: NB) is a development-stage niobium, scandium and rare-earth hopeful. Sigma Lithium (NASDAQ: SGML) is a Brazilian lithium concentrate producer. Century Aluminum (NASDAQ: CENX) is a US-focused primary aluminum smelter.

Two forces frame the group. The first is precious-metals strength, which has supported cash generation at the gold names. The second is Washington's push to onshore critical-minerals and metals Supply chains, a theme that touches NioCorp's scandium and rare-earth ambitions and Century's smelter expansion directly.

If policy support for domestic metals holds and precious-metals prices stay firm, the producers should keep throwing off cash while the developers chase financing. But commodity markets are cyclical, policy can reverse, and development projects routinely slip. The spread of outcomes here is wide.

SSR Mining (NASDAQ:SSRM): A Rebuilt Balance Sheet

SSR Mining is a gold and silver producer. In its second-quarter 2026 report filed with the SEC, for the period ended 30 June 2026, the company reported production of 101,959 gold equivalent ounces, revenue of $443.8 million and Net Income from continuing operations of $137.0 million, or $0.66 per diluted share. It closed the sale of its 80% stake in the Çöpler mine in Türkiye for roughly $1.49 billion in cash, ending June with $1.783 billion in cash and no long-term debt. Full-year 2026 production guidance was stated as 450,000 to 535,000 gold equivalent ounces.

The company repurchased $337.8 million of stock in the quarter and expanded its revolving Credit Facility to $600 million.

The Çöpler divestiture completes a pivot toward Americas-focused operations after the 2024 tailings incident that had defined the prior narrative. The balance sheet is now a genuine asset, giving management optionality on buybacks, dividends or acquisitions. Investors will likely judge SSRM on how it redeploys that cash; with all-in sustaining costs running toward the higher end of guidance, cost control and any tuck-in deals are what to watch.

NioCorp Developments (NASDAQ:NB): A Developer at the Financing Crossroads

NioCorp Developments is a development-stage company advancing the Elk Creek Critical Minerals Project in Nebraska, targeting niobium, scandium and rare earths. According to market data, NioCorp released updated feasibility results on 10 August 2026, describing a roughly 40-year mine life, an after-tax net present value at an 8% discount rate in the billions of dollars, and an upfront capital requirement near $1.85 billion. That same reporting notes a non-binding scandium-oxide supply memorandum with Lockheed Martin, an offtake and potential Equity term sheet with Traxys, and completion of study work tied to US Export-Import Bank due diligence.

Shares traded around $3.80 in mid-September 2026, with a market Capitalization near $554 million, according to aggregator figures.

NioCorp is the highest-risk, highest-optionality name here. It has no production and no revenue. Its value rests almost entirely on securing project financing and permitting, against a capital bill that dwarfs its market value. The binary questions are whether the Export-Import Bank-linked financing closes and whether the non-binding agreements convert into firm, funded commitments. Until then, the net present value headlines should be read as engineering estimates, not bankable value, and dilution risk is real given the funding gap.

Sigma Lithium (NASDAQ:SGML): Production Through a Price Trough

Sigma Lithium produces lithium concentrate from operations in Brazil, with corporate headquarters in Toronto. Per market data, the company delivered 35,000 tonnes of lithium concentrate in the second quarter of 2026, exceeding its 33,000-tonne guidance, and reported quarterly revenue of $54.7 million with all-in sustaining costs cited near $668 per tonne. It has pointed to an annualized production pace in the range of 240,000 tonnes. Its market capitalization sat around $1.0 billion, with shares near $8.90 in mid-September 2026.

Sigma's story is operational execution during a weak lithium-price environment. Low unit costs matter enormously in a downturn, because they let a producer keep generating Margin while higher-cost supply idles. The reported cost figures, if sustained, position it toward the lower end of the global cost curve.

The swing Factor is lithium prices, which have been depressed by oversupply and softer-than-hoped EV Demand growth. Volume expansion is within management's control; the price it fetches is not. A recovery would Leverage the cost advantage, while continued weakness would test the balance sheet.

Century Aluminum (NASDAQ:CENX): Leveraged to US Industrial Policy

Century Aluminum produces primary aluminum, operating smelters in the United States and Iceland, alongside alumina and bauxite operations. Market data cite 2025 revenue of about $2.53 billion and second-quarter 2026 sales of roughly $752 million, with adjusted EBITDA margins running in the low double digits in early-to-mid September 2026. The company is advancing a large greenfield smelter project in Inola, Oklahoma, alongside a partner, and a Mount Holly, South Carolina expansion, both moving toward final Investment decisions.

Century is arguably the most policy-sensitive name in the group. US tariffs on imported aluminum and incentives for domestic production directly shape smelter economics, and the Oklahoma project has been framed as a landmark domestic investment. That is a double-edged sword: policy tailwinds can lift Earnings power, but they can also reverse.

Watch for a formal final investment decision on Oklahoma, power-contract terms and any change in the Tariff or incentive regime. Aluminum prices and energy costs remain the core cyclical drivers, and the upside case leans heavily on sustained policy support that cannot be assumed to persist.

Aura Minerals (NASDAQ:AUGO): A Newly Prominent Nasdaq Gold Name

Aura Minerals is an operating gold, copper and silver producer with mines across the Americas, including Assets known as Minosa, Apoena, Aranzazu, Almas, Borborema and Serra Grande. It is not a pre-production explorer; production is already underway across its portfolio. Market data list full-year 2025 revenue near $921.7 million alongside a reported net loss, and a mid-September 2026 share price around $86 with a market capitalization cited near $7 billion on roughly 84 million Nasdaq-listed common shares.

Aura is the least-familiar ticker to US investors of the five, having become prominent on Nasdaq relatively recently while retaining a large Brazilian Shareholder base through depositary receipts. The reported market-cap and price figures come from aggregators and should be treated cautiously, because Aura's dual-listed structure can distort simple share-count math; its full economic capitalization differs from the Nasdaq common-share slice alone.

The producer's diversified, growing asset base gives it Operating Leverage to firm gold prices, but the 2025 reported net loss signals that cost, financing or non-cash items Warrant scrutiny. Investors should verify the Capital Structure directly from company filings before relying on any single-source valuation figure.

What Investors Should Watch

The near-term catalysts differ by name. For SSRM, it is capital allocation and any acquisitions funded by the Çöpler proceeds. For NB, it is whether project financing actually closes and whether memoranda become binding. For SGML, it is the lithium price and continued cost discipline. For CENX, it is a smelter final investment decision and the durability of US aluminum policy. For AUGO, it is verified financials and clarity on its capital structure.

Commodity prices sit beneath all five, and none of the companies controls them. Gold strength helps SSRM and AUGO; lithium weakness pressures SGML; aluminum and power markets swing CENX; and NB depends on Capital Markets and government backing rather than current cash flows.

One Index, Five Completely Different Commodity Clocks

Together these five show that materials inside the Nasdaq is not one trade but several. There is a de-risked precious-metals producer in SSR Mining, a speculative critical-minerals developer in NioCorp, a low-cost lithium operator riding out a price trough in Sigma Lithium, a policy-leveraged aluminum smelter in Century Aluminum, and a newly visible operating gold producer in Aura Minerals whose capital structure deserves its own scrutiny.

The clearest distinction running through the group is not commodity exposure but funding status: SSR Mining and Aura Minerals already produce and sell metal, Sigma Lithium and Century Aluminum sit between production and expansion decisions, and NioCorp has neither revenue nor committed financing. That funding gradient, more than any single price forecast, is what should shape how each name is sized.