SKC (011790) Stock Outlook 2026: The Copper Foil and Glass Substrate Reinvention Bet

The First Question to Ask Before Buying SKC

In one sentence, SKC (KRX 011790) is “a company that has sold off its old businesses and bet everything on future growth materials.” The bottom line: SKC has concentrated on two high-growth pillars, EV-battery copper foil and semiconductor glass substrates, while divesting legacy film, and the success of that transition determines where the stock goes. In other words, SKC is not a stock you value on today’s earnings, but one you value on the outcome of its reinvention.

Many investors approach SKC with a vague sense that it is “SK Group’s chemicals name,” then get caught off guard seeing earnings sitting in a loss or transitional phase. But the essence of this company is not a chemicals firm; it is a transition-stage company transforming into a growth-materials player. That is exactly why trying to value today’s SKC with traditional earnings metrics produces a picture that does not fit.

SKC’s business rests on three pillars. First, EV-battery copper foil made by subsidiary SK Nexilis. Second, semiconductor packaging glass substrates that subsidiary Absolics is pushing toward mass production. Third, a chemicals business centered on propylene oxide (PO) and propylene glycol (PG). On top of that, its formerly core film business has been divested, shifting the center of gravity toward growth materials.

Investors who understand this structure precisely decompose SKC into “copper foil cycle + glass substrate option + chemicals residual + financial burden.” Those who see it only as one lump struggle to identify which business moved earnings or why the stock is moving. This article’s goal is to help you make that decomposition.

👉 If you want to understand the battery-materials cycle structure, read the L&F (066970) stock outlook alongside this for context on materials cycles.

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The Big Picture of the Reinvention: Why Sell Film and Focus on Materials

The starting point of the SKC story is the business reinvention. The film business that once made SKC’s name had matured. Growth was limited, and commodity film faced fierce competition with thin margins. SKC chose to sell such legacy operations and concentrate the proceeds on copper foil and glass substrates, where growth potential is much larger.

The logic is clear: sell the cash from a mature business to bet on future growth. EV battery materials (copper foil) and next-generation semiconductor packaging (glass substrates) are areas with structural growth stories, so success could lift SKC’s enterprise value to a new tier.

But this reinvention cuts both ways. Because it shrank businesses that generated stable cash and shifted weight to growth businesses still going through heavy investment and a soft market, earnings volatility and financial burden rise during the transition. The reinvention raises growth potential while creating a window in which the company is vulnerable until that growth materializes.

For investors, the key question is this: “Can the growth pillars secured through the reinvention (copper foil and glass substrates) fill the gap left by the divested cash cow and then some?” The answer to that question is where the SKC investment is decided. The direction of the reinvention is reasonable, but two variables, market conditions and financing, can trip up execution.

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Copper Foil (SK Nexilis): Growth Pillar and Cyclical Risk

The first pillar of SKC’s growth story is subsidiary SK Nexilis’s copper foil. Copper foil is the thin copper layer that acts as the current collector on the battery anode. Each cell uses a meaningful amount of foil, so foil demand rises as EV sales rise.

SK Nexilis’s competitive edge lies in how thin, wide, and long it can make foil at uniform quality. Thinner foil lets you pack more active material into the same space and raise energy density, so higher-performance batteries demand higher-quality foil. This difficult manufacturing capability is SK Nexilis’s moat.

But the copper foil business carries a strong embedded cyclical risk. Broken down by phase:

Phase	Foil Demand	Processing Charge (Pricing)	Utilization / Profitability
EV boom / undersupply	Rapid increase	Rising, firm	Utilization up, margins improve
Entering oversupply	Slowing	Downward pressure	Utilization and margins erode
With demand slowdown	Flat to declining	Further declines	Double hit, loss risk
Normalization / recovery	Reaccelerating	Stabilizing	Utilization recovers

The problem is that amid EV-boom expectations, many players expanded copper foil capacity simultaneously, producing an oversupply phase. When supply exceeds demand, the processing charge gets squeezed. Layer on an EV demand slowdown, and utilization falls while the fixed costs of the expanded capacity turn into a burden. Margins thin even when volumes sell, and expansion becomes dead weight.

So copper foil is SKC’s growth pillar and, at the same time, the epicenter of its earnings volatility. Investors should understand foil as “a business whose long-term growth is intact but that deeply depresses earnings at the bottom of the cycle.” Tracking foil shipments, utilization, and the direction of the processing charge, rather than headline revenue, is the way to see the underlying reality.

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Glass Substrates (Absolics): Real Growth Theme or Distant Option?

The pillar that draws the brightest spotlight in the SKC story is the semiconductor glass substrate. Handled by subsidiary Absolics, this is a next-generation technology that replaces the traditional organic (plastic-based) substrate in packaging with glass.

Why glass? Glass offers excellent flatness and high thermal stability, and it suits stable fine-pattern formation over large areas. As semiconductors move toward higher density and performance, and as heterogeneous integration, bundling multiple chips in one package, spreads especially in AI and data-center chips, the need for larger, more stable substrates grows. Glass substrates are drawing attention as an alternative that could overcome the limits of organic substrates in this trend.

SKC investing early through Absolics and securing initial capacity is a clear strategic asset. If glass substrates are actually commercialized and adopted by major semiconductor and packaging customers, SKC gains an entirely new high-value growth engine. This is why the market calls SKC a “next-generation packaging growth theme.”

But there is plenty to weigh soberly.

First, uncertainty over commercialization timing. New materials and processes have a large gap between lab success and volume production. When, and at what scale, glass substrates will actually generate revenue is not yet certain.

Second, mass-production yield and reliability verification. Glass is fragile and requires difficult processes like through-glass via (TGV) fabrication. Stably achieving the yield and reliability customers demand is the crux.

Third, the pace of customer adoption. Semiconductor packaging takes a long time to qualify. It takes time for a customer to decide to switch from organic to glass, and longer still for that to translate into volume adoption.

So glass substrates are “an option that could someday become big,” not “the pillar carrying earnings today.” When investors reflect this in valuation, they must be careful not to pull too much of the expectation into present value. Remember that each piece of news on commercialization progress and customer qualification reprices this option.

👉 If you want to understand demand for AI and data-center semiconductors, read the SK Hynix (000660) stock outlook alongside this to see the backdrop for glass substrate demand.

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Chemicals (PO/PG) and the Residual Portfolio: Buffer and Market Variable

SKC’s third pillar is the chemicals business centered on propylene oxide (PO) and propylene glycol (PG). These are base and specialty chemicals used across broad downstream industries, from polyurethane to cosmetics, food, and pharmaceutical raw materials.

The chemicals business has a different character from growth materials (copper foil and glass substrates). It is a relatively mature area, but within SKC’s portfolio it adds cash flow and partly buffers earnings volatility. That said, this is also a spread business whose margins rise and fall with feedstock prices, downstream demand, and regional supply, so it cannot be called stable either.

From an investor’s view, chemicals carry two meanings. First, a buffer that props up total earnings while copper foil and glass substrates are not yet generating enough profit. Second, a variable that, when the chemicals market is weak, sees that buffer weaken and drag down company-wide earnings. In short, chemicals can make SKC’s earnings smoother or rougher.

From the reinvention angle, as SKC concentrates more on growth materials, the weight and role of chemicals may be recalibrated. Watching which businesses the company keeps as core and which it trims or adjusts is important.

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SKC Investment Risks: Balancing the Bull Case With a Reality Check

SKC’s growth story is attractive, but the following risks deserve serious scrutiny.

EV demand slowdown risk: Foil demand derives from EV sales. If growth falls short of expectations, foil shipments flatten or fall and utilization drops. This is a cyclical variable embedded in the business structure.

Copper foil oversupply and falling prices: Simultaneous capacity expansion by many players pushes supply ahead of demand and squeezes the processing charge. Falling prices mean thinner margins even as volumes grow.

Heavy capex and financial burden: Expanding copper foil and glass substrates requires enormous capex. Funding it with debt brings interest and leverage burden; funding it through asset sales or equity issuance brings portfolio shrinkage or dilution. When the market is soft, this burden weighs more heavily.

Glass substrate commercialization uncertainty: Absolics’s glass substrates carry uncertainty over timing, yield, and adoption pace. Because expectations have run ahead, delays can trigger disappointment selling.

Difficulty of valuation: With earnings in a loss or transitional phase, earnings-based metrics (P/E) are hard to apply. That leaves reliance on sum-of-the-parts or normalized-future assumptions, and if those assumptions wobble, the valuation reprices sharply.

Group and governance variables: As an SK Group affiliate, group-level restructuring, inter-affiliate business adjustments, and asset sales can move the stock. Such events are both opportunity and uncertainty.

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SKC vs. Peers: Where It Sits in the Value Chain

Before adding SKC to a portfolio, comparing it with differently structured names clarifies its positioning.

Company	Core Business	Growth-Theme Exposure	Earnings Stability	Character
SKC (011790)	Copper foil + glass substrate + chemicals	Batteries + semiconductor packaging	Low (transition)	Restructuring / turnaround
L&F (066970)	High-nickel cathode	Pure battery-material play	Low (cyclical)	Metal-price linked, demand cycle
POSCO Future M (003670)	Cathode + anode	Diversified battery materials	Medium	Material diversification
SK Hynix (000660)	Memory chips	AI / data center	Medium (cyclical)	Large-cap semiconductor

The comparison reveals SKC’s position. Where L&F and POSCO Future M are “pure plays” on battery materials, SKC straddles two different growth themes, copper foil (batteries) and glass substrates (semiconductor packaging). This is both a diversification benefit and a dilution of focus.

The most reasonable classification is to see SKC as “a restructuring and turnaround stock exposed to two growth themes.” From that view, it is hard to value with the same yardstick as stable-earnings names; you must judge it by tracking the reinvention’s progress and each business’s recovery trajectory. Rather than a large standalone weight, diversified exposure within a materials and semiconductor value chain is better for managing volatility.

👉 Comparing with the POSCO Future M (003670) stock outlook in the same battery-materials space highlights the differences in materials-business structure.

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A Practical Framework for International Investors

Scenario 1: SKC’s Role in a Materials and Semiconductor Portfolio

If you hold SKC alongside battery materials like L&F and POSCO Future M and a semiconductor name like SK Hynix, what positioning fits?

SKC is a “hybrid growth-and-turnaround stock” straddling two themes. Within a portfolio, it is closest to an aggressive growth slot that bets on the reinvention succeeding. Because earnings volatility and financial risk are high, a large standalone weight is dangerous.

A suitable approach: cap the individual weight and diversify alongside battery-material (cathode) and semiconductor (memory) names to reduce single-company and single-theme risk. Within that mix, SKC is best understood as a high-beta slot with “large upside if the reinvention succeeds, large downside if it fails or is delayed.”

On dividends, SKC is likely to prioritize cash toward investment and balance-sheet stability, so this is a capital-gains story rather than a dividend one.

Scenario 2: Currency, Access, and Tax for International Investors

SKC is a domestic Korean stock listed on the KOSPI. For an international investor, the first practical layer is access and currency. You typically gain exposure either through a broker that offers direct Korea market access or, where available, via depositary receipts or Korea-focused funds. Note that direct Korea access is less common than for US names, so check what your broker supports.

Currency is a real variable. Your total return combines SKC’s price move with the KRW/USD (or your home currency) move. A strong dollar against the won can erode gains for a dollar-based holder even if the local-currency price rises, and vice versa. For a volatile transition-stage stock, this currency layer adds another swing factor to size for.

On tax, rules differ by your country of residence and by treaty. Korea applies withholding on dividends for foreign investors, and capital-gains treatment for non-residents depends on ownership thresholds and tax treaties. Because SKC is in a reinvestment phase with limited dividend appeal, the more relevant considerations are capital-gains treatment and currency, not dividend yield. Confirm the current rules with a qualified tax advisor in your jurisdiction before investing.

👉 For the broader picture of capital-gains tax mechanics, see the stock capital gains tax guide.

Scenario 3: An Entry and Exit Strategy Tied to Reinvention and Market Signals

Because SKC is a transition-stage stock, “event-linked monitoring of reinvention progress and market signals” may fit better than fixed-interval accumulation.

Key monitoring metrics:

• Copper foil shipments, utilization, and processing-charge direction to judge cycle bottom and recovery
• EV sales growth (especially North America, Europe, China) as the ceiling on foil demand
• Glass substrate (Absolics) customer qualification, orders, and commercialization progress as the realization of the growth option
• Chemicals (PO/PG) spreads as the strength of the earnings buffer
• The debt and financing structure supporting heavy capex, plus progress on asset sales, as the financial risk gauge

The difficulty of this strategy is that a transition-stage stock’s price reacts to expectations and news before earnings. Glass substrate hopes can push it up early, while copper foil market fears can depress it excessively. So focus on leading signals (orders, qualifications, expansion, financing) rather than lagging earnings, and keep a principle of “scaling in as the substance of the reinvention is confirmed, and scaling out when expectations run ahead into overheating.”

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SKC Earnings Monitoring: What to Check Every Quarter

When tracking SKC, knowing what to look at first in quarterly results makes judgment clearer. The key is not being dazzled by a single headline revenue or profit line.

Priority 1: Copper foil shipments, utilization, and pricing

The physical growth of the foil business shows up in shipments; profitability shows up in utilization and processing charges. Whether shipments rise, utilization holds, and price declines stop is the substance of a cycle recovery. Conversely, if utilization drops, fixed-cost burden can widen losses.

Priority 2: Glass substrate (Absolics) commercialization progress

Customer qualification, initial orders, production-line ramp, and yield stabilization show how far the growth option is being realized. This news flow is one of the biggest variables driving SKC’s medium- to long-term valuation.

Priority 3: Chemicals (PO/PG) market and spread

Check whether chemicals buffer earnings or drag them down. A weak chemicals market makes the transition-phase earnings burden heavier.

Priority 4: Balance sheet and financing

The debt level supporting heavy capex, interest burden, progress on asset sales, and any equity issuance reveal the financial risk. The crux is whether growth investment proceeds without impairing balance-sheet health.

Combining these four lets you look past the “revenue up or down” headline and track the qualitative progress of the reinvention by separating each business’s recovery trajectory from financial resilience.

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Related Reading

• 👉 L&F (066970) Stock Outlook 2026: High-Nickel Cathode Leadership and Metal-Price Linkage
• 👉 POSCO Future M (003670) Stock Outlook 2026: Integrated Cathode-Anode and Material Diversification
• 👉 SK Hynix (000660) Stock Outlook 2026: The AI and Data-Center Memory Cycle
• 👉 Stock Capital Gains Tax Guide: Reporting and Tax-Saving Strategies

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This article is for informational purposes only and is not investment advice or a recommendation to buy or sell any security. Stock investing carries the risk of loss of principal, and investment decisions should be made independently based on your own financial situation and risk tolerance. Any description of a company’s business or outlook reflects the time of writing; always verify the latest disclosures and consult a professional before investing.