Lasertec: the quiet monopoly behind every EUV chip
A neutral, evidence-first reading of Lasertec — the Japanese maker whose tools verify the photomasks for every leading-edge chip, holding a near-monopoly so profitable, and so concentrated, that it became both Japan's most-traded stock and a short-seller's biggest target.
In the year ended June 2025 Lasertec turned over a record ¥251.5B (up 17.8%) and earned a 48.8% operating margin — economics far above typical hardware-maker margins[11][22]. It does it from a single, narrow franchise: it is effectively the only company in the world selling tools that inspect extreme-ultraviolet (EUV) photomasks at the actual 13.5nm wavelength chips are printed with[41].
Every advanced chip starts from a photomask — the master stencil ASML's EUV scanners project onto silicon. A defect on that mask repeats on every wafer, so chipmakers like TSMC, Samsung and Intel must inspect masks with light of the same 13.5nm wavelength. Lasertec's ACTIS (patterned masks) and ABICS (mask blanks) tools are the only commercial way to do that[17][18]. That position produced a near-sevenfold revenue rise and a stock that rose roughly 1,500–1,800% over five years[4]. The open questions are not whether the franchise is real — it plainly is — but how durable the monopoly is[42], whether record FY2025 marks a cyclical peak[23], and what to make of a 2024 fraud allegation that a special committee dismissed but markets never fully shook off[43]. The evidence cuts both ways. This study lays out both cases; the verdict is yours.
The decisive questions
Each links to the section that lays out the evidence on both sides.
Lasertec is the only company selling tools that inspect EUV photomasks at the actual 13.5nm exposure wavelength — a genuine near-monopoly. Bull: the physics and a decade of customer qualification make it nearly un-substitutable. Bear: the lead is not legally protected, KLA has researched the same actinic approach, and big customers want a second source.
FY2025 was the best year ever — ¥251.5B revenue, a 48.8% operating margin. But orders fell ~60% in the same year and management guided FY2026 to its first profit decline after the record streak. The same EUV capex cycle that lifted Lasertec can pause it.
In June 2024 short-seller Scorpion Capital called Lasertec 'the largest outright fraud in the world.' Lasertec denied it, and a special committee found no accounting irregularities. Skeptics note the close-timed CEO/CFO change and that some questions about inventory and disclosure never fully went away.
Three customers — TSMC, Intel, Samsung — are ~77% of revenue, and ~92% of sales are overseas. Lasertec is ~$1.7B against KLA's ~$12B. A franchise this narrow is extraordinarily profitable when EUV is ramping and extraordinarily exposed when a single buyer pauses.
A decade of growth — into a guided decline
Net sales, ¥B, fiscal years ending June. FY2026 is the company's revised guidance (~¥220B), not a reported figure — the first down year after the record run.
How to read this
Ten sections, each built the same way: a neutral synthesis, a two-sided case-for / case-against ledger, sourced data and charts, and dated facts. Start with the question that interests you, or read in order from the Overview.