Sphere Corp: A Value Study of Aerospace Specialty Alloys

Cost structure and dependencies. Fact: In 2025 the company posted revenue of KRW 95.64 billion, a gross margin of about 17.6%, and an operating margin of about 9.5%; on a comparable basis in 2024, revenue was KRW 85.43 billion, gross margin about 33.8%, and operating margin about 17.8%. In other words, revenue grew about 12% while margins fell markedly. Over the same period, operating cash flow swung from +KRW 4.33 billion the prior year to -KRW 14.67 billion in 2025, with working-capital changes alone consuming about KRW 16.91 billion. This set of figures shows that raw materials, inventory, receivables, and delivery arrangements all matter a great deal in the company's cost structure.

Inference: This is not a SaaS model where "revenue grows with almost no capital intensity"; it is closer to an asset-light, working-capital-heavy industrial SCM model. That is, the company may not need sustained, massive plant CAPEX going forward, but it very likely needs to keep funding inventory, receivables, and prepayments to support growth. For a value investor, the biggest question with this kind of company is not "will it grow" but "after it grows, does the money stay in shareholders' hands."

Industry stage and competitive landscape. Fact: Industry data cited by the company in its Q1 2025 report puts the global commercial-launch-services market at about USD 18.68 billion in 2024, projected to reach USD 64.25 billion by 2034, a CAGR of about 13.15%. The Space Foundation reports that the global space economy reached USD 613 billion in 2024, up about 7.8% year over year. The FAA's 2025-2034 commercial space transportation forecast likewise makes clear that the commercial launch/reentry industry is still evolving rapidly and that overall industry activity continues to rise.

Inference: This is a good industry, at least in the sense that long-term demand is pointed the right way; but that does not automatically mean "a good company at a good valuation." Sphere's position looks more like a small but critical node supplier/organizer within the aerospace value chain than an aerospace prime with absolute technological monopoly. Among comparable Korean listed companies, HVM leans more toward upstream high-purity specialty-metal manufacturing, Kenkoaerospace leans toward aerospace components, Hanwha Aerospace is a more integrated and more dominant large platform, and SeAH Besteel is more of a traditional specialty-steel and high-end-materials reference point. Sphere occupies a distinctive position, but not one secure enough to "ignore the competition."

If the stock market closed for 5 years, would I want to hold it. My answer is: if the cost basis were very low, and if over the next 4-6 quarters the company could prove cash flow turning positive and customers becoming less concentrated, I would reconsider; but at the current price and the current quality of the statements, I would not. This is not a rejection of the direction of the business, but a rejection of "buying this business at this price right now."

Moat and Management

The moat, conclusion first. Sphere is not without a moat, but its moat looks more like "customer validation + supply-chain execution + delivery reliability" than "brand monopoly + network effects + heavy patent barriers." Once this kind of moat is built, it does have value; but as I see it, today it looks more like a narrow moat that has not yet been fully disproven, nor yet been sufficiently proven to keep widening.

The table's entries on lead time, product mix, management's role, the long-term contract, and major-customer concentration are based mainly on the company website, company disclosures, and external research summaries. One thing worth stating plainly: the claim of being "one of SpaceX's top five Tier 1 suppliers, and the only one in Asia" comes more from sell-side and media accounts, and I treat it as external research information that needs further independent verification, so I do not count it as the hardest moat evidence.

Is the moat widening, stable, or narrowing. Inference: In the short term there is a chance it is widening; over the long term it has not yet been proven. The reason is simple: a 10-year contract itself signals progress in the customer relationship, but the 2025-to-Q1 2026 financials have not yet proven in parallel that the company has secured durable pricing power or a high cash-return rate. If over the next two or three years revenue keeps growing, gross and operating margins recover, and operating cash flow turns positive, then the moat can be said to be widening; if it is merely the headline contract getting larger while margins and cash flow stay weak, then I would define it as the story widening while the moat does not.

Can it raise prices in inflation and stay profitable in recession. So far I see no strong evidence of meaningful pricing power. On the contrary, in 2025 revenue grew while margins fell, which shows that — at least for now — the company cannot fully pass upstream/execution-side pressure on to customers. Whether it can stay profitable in a downturn has not been tested through a full cycle either. Q1 2026 operating profit was only KRW 0.7 billion, which shows earnings flexibility is thin.

Is management trustworthy. Fact: The company website shows that Harrison Choi currently serves simultaneously as CEO/Chairman of Sphere Corporation, CEO of Sphere Power, and a director of Sphere Nickel Cobalt. The shareholder page on the company website discloses that, as of 2026-05-28, Major Shareholders together held 13,991,769 shares, or 27.14%. A separate official major-shareholder filing shows that as of 2026-02-05, Choi Kwang-soo and related parties held/controlled a combined 36.85%. This means management is not entirely disconnected from major-shareholder and shareholder interests; at least they have "skin in the game."

But the governance structure does not reassure me. Fact: The 2025 business report discloses that the board consists of 3 inside directors + 2 outside directors, with no board committees. For a company actively pursuing cross-border investment, guarantees, convertible-bond financing, and subsidiary capital maneuvers, that governance structure is not strong.

Is capital allocation rational. This is the part I am least satisfied with. Fact: In January 2026 the company disposed of treasury shares for the purpose of "capital injection into a subsidiary." A major-shareholder filing further discloses that 1.8 million treasury shares were once pledged with disposal rights attached, to support SNC's payment arrangements with a counterparty, involving an amount of about KRW 41.58 billion. At the same time, in April 2026 the company issued a KRW 37.5 billion private-placement convertible bond, corresponding to 834,650 potential new shares. The 2025 business report also discloses that certain executives/employees received treasury-share incentives of 100,000 shares and 80,000 shares.

Inference: This is not Berkshire-style "steady and restrained" capital allocation; it looks more like a high-growth thematic company rapidly shuffling equity, treasury shares, guarantees, and convertible bonds to bet on future projects. It might deliver large expansion, or it might turn a perfectly decent industrial opportunity into a financing path that is not friendly enough to minority shareholders. For a "balanced, conservative" investor, this is a significant negative.

Financial Quality and Owner Earnings

First, the most important caveat I can offer: this company's long 5-to-10-year history is not suited to mechanical linear comparison. The listed entity has been through a major merger and a business switch, so the financial observation window that is genuinely economically meaningful and most relevant to today's business is mainly 2024A, 2025A, and Q1 2026. Earlier years can serve as reference, but should not be used to conjure the illusion of a "stable ten-year growth curve."

Key Financial Metrics

Note: 2024A and 2025A are taken from the company's 2025 consolidated balance sheet, income statement, and cash-flow statement; Q1 2026 revenue and operating profit are on the company's disclosed basis, and the "abnormally high" portion of net income is driven mainly by fair-value changes on convertible-bond derivatives. After Q1 2026, the company added a further KRW 37.5 billion private-placement convertible bond, corresponding to 834,650 potential new shares.

How to read this table. Fact: In 2025 revenue grew about 11.95% year over year, but operating profit fell about 40%; net income from continuing operations was still positive, yet because of discontinued-operation losses and complex financial items, reported net income was almost wiped out. Worse, the direction of cash flow completely reversed: operating cash flow was positive in 2024 but sharply negative in 2025.

Is the profit real cash profit, or accounting profit. My judgment is: at least up to today, it is not yet a reassuring "real cash profit" company. There are three layers to the reasoning. First, the negative 2025 operating cash flow was driven not by unusually large CAPEX but by working capital swallowing cash. Second, the Q1 2026 net income of KRW 41.8 billion was far above operating profit of KRW 0.7 billion, and sell-side reports make clear this was mainly the effect of valuation gains/losses on convertible-bond-related derivatives. Third, in the 2025 annual report the company itself explained that financial gains/losses in the prior year and the current year were heavily affected by gains/losses on convertible-bond-related derivatives. For a long-term owner, this kind of profit must be discounted.

Does growth require a lot of capital. If you look only at fixed-asset CAPEX, the answer is "not much"; in 2025 combined PPE and intangible-asset purchases were very small. But if you look at working capital, the answer is "a lot." In 2025 the company's receivables and inventory rose markedly, with period-end net working capital of about KRW 20.08 billion, equal to about 21% of that year's revenue. This means the company runs a low-CAPEX, high-working-capital growth model. Such growth is not impossible to pursue, but shareholders must be clear-eyed: it may well "eat cash first, the faster it grows."

Is the balance sheet sound. Looking only at on-balance-sheet liabilities, at the end of 2025 total liabilities were about KRW 31.72 billion and shareholders' equity about KRW 63.63 billion, so debt/equity is not out of control; with cash of KRW 4.17 billion and interest-bearing debt of about KRW 12.33 billion, on-balance-sheet net debt is not extremely heavy either. The problem is that the company also provided guarantees/guarantee-type arrangements of about KRW 41.58 billion around the SNC project, a scale roughly equal to two-thirds of year-end 2025 shareholders' equity. For a conservative investor, this off-balance-sheet or quasi-off-balance-sheet risk is what truly warrants close watching.

Are there clear signs of financial fraud. In the materials I have reviewed, I have seen no clear evidence directly proving fraud; but I have indeed seen many factors that lower "profit readability": basis changes after a major merger, discontinued operations, embedded derivatives in convertible bonds, fair-value gains/losses, treasury-share financing, and cross-border subsidiary injections and guarantees. This is not the same thing as "fraud," but from a value-investing standpoint it equally means you should not readily place a high-certainty valuation on the income statement.

Owner Earnings Analysis

Strict historical basis. On the most basic owner-earnings logic, starting from 2025 reported net income of KRW 0.17 billion, adding back non-cash items of KRW 6.46 billion, then deducting maintenance CAPEX and working-capital usage, the resulting "owner earnings" is still roughly negative; in other words, 2025 owner earnings move in the same direction as free cash flow, on the order of -KRW 14.7 billion. This conclusion is crucial for a value investor: in 2025 the company did not create cash that could be freely distributed to shareholders.

Conservative forward basis. If I grant the company a looser but still conservative forward assumption — referencing sell-side estimates of 2026 revenue of KRW 355.1 billion and operating profit of KRW 21.7 billion, and assuming that only 45%-60% of after-tax operating profit ultimately converts into owner earnings (because it still has to keep funding working capital, pay taxes, and sustain operations) — then the conservative forward owner earnings I get is only about KRW 8-13 billion per year. Against the current market cap of about KRW 1.6514 trillion, that is a multiple of roughly 127-206x owner earnings. For an industrial supply-chain company that has not yet proven cash-flow stability and shows clear customer concentration, I do not consider that cheap.

Owner earnings in one sentence. Facts and inference combined: This company's biggest financial problem right now is not "will it grow" but "does growth bring owner earnings along with it." So far, the answer is not satisfying enough.

Valuation, Margin of Safety, and the Counterargument

Intrinsic-Value Estimate

Method 1: Owner-earnings discounting. The valuation set below is an assumption, not a fact. I build the valuation on "forward owner earnings" rather than on the headline contract or surface net income, because for a long-term owner what truly matters is future distributable cash flow.

These assumptions are already clearly more optimistic than the 2025 historical cash performance; the "optimistic scenario" in particular already implies that over the next few years the company smoothly absorbs working-capital pressure, profitability recovers substantially, contract execution goes well, and there is no severe dilution damage. Even so, the resulting ceiling on intrinsic value is still below the current share price of about KRW 32,500. The most fragile assumption here is not revenue growth, but whether revenue growth ultimately converts into owner earnings at high quality. The current price places too much confidence in that question.

Based on the DCF above, I offer a more usable value range:

On this framework, the current price of KRW 32,500 is already about 16% above the upper edge of my optimistic range, and far above the conservative and fair ranges, so I judge that no margin of safety exists.

Method 2: Relative valuation. As of around 2026-06-03, Sphere's headline valuation was roughly P/E 44.9x, P/B 16.13x. On a comparable basis, HVM is about P/E 78.4x, P/B 12.66x; Kenkoaerospace, still loss-making, has no applicable P/E and a P/B of about 1.89x; Hanwha Aerospace on public bases is roughly P/E 34-42x, P/B 5.5-6.4x; and SeAH Besteel Holdings is about P/E 34.27x, P/B 0.99x. This says two things: first, there is indeed a growth premium across the Korean aerospace/new-materials chain; second, the fact that peers are all expensive does not mean Sphere is cheap, especially when Sphere's cash conversion and governance quality are still weaker than some more mature rivals.

Method 3: Asset/liquidation value. At the end of 2025 the company's total assets were about KRW 95.36 billion and total equity about KRW 63.63 billion, including cash of KRW 4.17 billion, accounts receivable of KRW 22.05 billion, inventory of KRW 10.48 billion, investment property of KRW 8.94 billion, and a sizable derivative-asset balance. Whether you look at year-end 2025 book equity or at the P/B of about 16x that a third party computes from Q1 2026 data, the asset approach can hardly support the current price. In other words, this is not a stock you can comfort yourself with by treating net assets as a floor.

Margin of Safety

My answer is clear: there is no adequate margin of safety at the current price. The most fragile valuation assumption is not "can the space industry grow," but "can Sphere, as one link in this value chain, ultimately secure owner earnings that are high enough and stable enough." If future growth falls short of expectations, margins keep falling, working capital keeps eating cash, or the valuation multiple retraces, this investment can easily turn from "a good story" into "a permanent loss at a high entry point." This is the classic case of a good industry that may correspond to a bad price.

The Strongest Counterargument

The strongest bull arguments, as I see them, are the following.

First, the market may be treating this company as a "scarce aerospace-materials leader," but on its financials and business model it looks more like a high-growth, customer-concentrated industrial SCM company whose cash flow is not yet proven. Such a company can be excellent, but it should not be paid for as a "great company of extremely high certainty."

Second, the headline contract value is easy to misread. The SpaceX ten-year contract headline of about KRW 1.544 trillion looks enormous, but that is 10 years of revenue expectation, not 10 years of profit, still less present-valued free cash flow; and Sphere's current market cap is already around KRW 1.65 trillion. Let margins, cash conversion, or customer expansion fall even slightly short of expectations, and the valuation cannot stand.

Third, the capital structure and financing path are not reassuring enough. Subsidiary projects require treasury-share disposals, pledges, guarantees, and convertible bonds, which means minority shareholders face not only operating risk in the future but also dilution risk and structural financing risk.

Fourth, the earnings-quality problem is still unresolved. If net income continues to be driven mainly by derivative fair value, discontinued-operation disposals, and accounting re-measurements rather than by operating cash flow, the current valuation is hard to justify.

What Facts Would Overturn My Judgment

If the following facts emerged in the future, I would be willing to revise my judgment up materially. One, at least 4 consecutive quarters of positive, good-quality operating cash flow / free cash flow, rather than net income improving only on derivative gains. Two, a clear rise in the share of revenue not from a single customer — for example, non-SpaceX or non-single-large-customer revenue rising to more than 30%. Three, the SNC/nickel project genuinely delivering gross-margin improvement and cash savings, rather than continuing to consume equity and guarantee capacity. Four, share-count growth clearly slowing, with convertible bonds / treasury-share disposals no longer the routine financing tools. Five, operating margin returning to near or above the 2024 level, rather than revenue growing while margins keep falling.

Comparison with Other Opportunities

Versus the strongest peer in the industry. If I wanted higher-certainty exposure within the Korean aerospace-materials chain, Hanwha Aerospace is clearly the more mature industrial platform; HVM at least has a clearer manufacturing-process moat in "high-purity vacuum melting"; and SeAH Besteel, while it lacks the same space imagination, has better-understood assets, dividends, and books. Sphere's highlights are flexibility and thematic purity; its weaknesses are cash flow and capital allocation. For conservative capital, it is not clearly superior to these alternatives.

Versus a broad-market index. The Korean market is still in a strong phase driven by AI and tech weightings, with the KOSPI recently rising to about 8,801 points. But even setting aside index valuation and looking only at diversification, a broad index is already naturally better than a company like Sphere with a single-customer, single-theme, single-capital-structure story. For a "balanced, conservative, 10-year-plus" account, I think buying a more diversified index offers both a better win rate and better quality of sleep.

Versus the risk-free rate. The Korean 10-year government-bond yield has recently been around 4.12%-4.14%. On my estimate of the return scenarios at Sphere's current price, unless you adopt very optimistic operating and valuation assumptions, the expected annualized return it offers may not clearly beat such risk-free or low-risk yields, let alone compensate for the customer-concentration, cash-flow, dilution, and governance risks it carries.

Checklist and Final Investment Conclusion

Investment Checklist

Final Investment Conclusion

[Final Rating] Avoid

[Investment Thesis in One Sentence] This is an understandable, potentially fast-growing aerospace specialty-alloy supply-chain business, but buying in at the current price of KRW 32,500/share means shareholders are paying something closer to a "thematic-heat price" than a "value price validated by owner earnings."

[Core Bull Case]

• The long-term direction of space launch and the space economy is right; industry demand is not weak.

• The company has secured long-term large-customer orders, giving it higher revenue visibility than an ordinary small industrial stock.

• The business model is relatively light on CAPEX, so in theory, if working capital is controlled, future cash-flow flexibility could be large.

• Management ownership/control is not low, so they are not entirely disconnected from shareholders.

[Core Bear Case]

• Neither 2025 nor Q1 2026 proved that "profit = cash flow"; owner-earnings quality is clearly inadequate.

• Customer and project concentration is high, and the company itself disclosed the possibility of order cancellation.

• Capital allocation leans aggressive: treasury-share disposals, pledges, subsidiary guarantees, and convertible-bond issuance all appearing at once.

• The current valuation already clearly lacks a margin of safety.

[Key Assumptions]

• The order-fulfillment rate from SpaceX and other customers is high, and does not stop at the headline contract.

• Operating margins recover in 2026-2027, rather than continuing to be eroded by inventory, receivables, share-based incentives, and project costs.

• The SNC/nickel-related positioning delivers cost improvement, rather than continuing to consume guarantee and financing capacity.

• Share-count expansion slows markedly over the next 12-24 months.

[Fair Buy Price] I would rather treat KRW 8,000-12,000/share as the range where conservative long-term capital can genuinely start to research and consider buying in tranches. That range roughly corresponds to applying a further 25%-35% margin of safety to my "fair value range." The current price does not meet this condition.

[Target Holding Period] If the fundamentals are validated in the future, it is in theory suited to 5-10 years; but at the current price, I do not recommend buying first and waiting for validation.

[Expected Annualized Return] The following are rough scenario estimates, starting from the current price of KRW 32,500 and based on a 10-year holding period:

• Conservative scenario: -10% to -5%

• Neutral scenario: -3% to +2%

• Optimistic scenario: +6% to +9%

The core meaning of this return distribution is not "the company will not grow," but "even if it grows, the current entry price may be too high." Against the Korean 10-year government bond yield of about 4.1%, these odds are not attractive.

[Maximum Loss Risk] If over the next two years there is order fulfillment short of expectations, persistently negative operating cash flow, continued share dilution, and a cooling of the market's valuation of the space theme, with the share price reverting toward my "fair value range" or even the "conservative value range," a decline of 60%-80% is not hard to imagine. The current price is far from both the asset floor and the cash-flow floor, and that is where the risk of permanent capital loss lies.

[Tracking Metrics]

• Aerospace specialty-alloy revenue share and the share of revenue not from a single customer

• Whether gross margin and operating margin recover

• Whether operating cash flow and free cash flow turn persistently positive

• Accounts receivable/revenue, inventory/revenue, net working capital/revenue

• New convertible bonds, conversions, treasury-share disposals, and changes in total share count

• Convertible-bond derivative gains/losses as a share of net income

• Actual cost savings, dividends, or equity-method income from the SNC/nickel project

• Outstanding external guarantees and pledges

• Execution, deferral, and cancellation of contracts with SpaceX and other major customers

• Whether board governance strengthens, for example by establishing specialized committees.

[Signals That Trigger a Reassessment]

• 4 consecutive quarters of positive operating cash flow, not flattered by derivative gains

• Operating margin back to around the 2024 level

• A marked increase in revenue not from a single large customer

• Subsidiary projects beginning to generate real cash returns, rather than continuing to raise financing

• The convertible-bond and share-dilution pressure ending

• Conversely, if there are new guarantees, further large dilution, or contract execution markedly weaker than expected, an immediate reassessment is also required.

[Final Recommendation] Standing in the shoes of a "long-term business owner," I acknowledge that Sphere carries a real and very tempting growth story: space, specialty alloys, a major customer, a global supply chain, a long-term contract. These are all real. But equally real is this: cash flow has not yet found its footing, capital allocation is not steady enough, the governance structure is not strong enough, and the current price is already very expensive.

So my recommendation is not "reject the company," but reject buying it at this price using the methods of value investing. For capital like yours — 10-year-plus, balanced and conservative — I would more coolly say this: pass on it for now, and come back when cash flow and price together start to look more like a "value-investing candidate."

This report is based on public information and does not constitute investment advice. Markets carry risk; invest with caution.