Compare moats
Up to three covered companies, band by band. Every call is a curated editorial judgment, never a disclosed figure — and every band carries its cited basis.
| Teradyne | ASML | Vistra | |
|---|---|---|---|
| Moat rating | narrow Real but bounded: the FY2025 10-K reports gross profit at 58.2% of total revenues, a level it records as a decrease - 'Gross profit as a percent of total revenues decreased by 0.3 points, primarily due to product mix' from 58.5% in 2024 - while a shared IG-XL test-program environment spans the FLEX and J750 families. Against that, the filing's own risk-factor heading is 'We are subject to intense competition' and it concedes that 'Some of our competitors have introduced or announced new products with certain performance characteristics that may be considered equal or superior to those we currently offer,' adding that it faces competition 'from emerging Asian companies and internal development at several of our customers.' | wide ASML's FY2025 20-F states it "is currently the world's only manufacturer of EUV lithography systems" — an effective monopoly on the extreme-ultraviolet tools required to pattern leading-edge logic and memory chips. | narrow The 10-K states that "the majority of our facilities operate as “merchant” facilities without long-term power sales agreements" and that Vistra is "not guaranteed any rate of return on our capital investments". Against that, the scarcity is real: six NRC-licensed nuclear units totalling 6,448 MW, licences running 2036-2053, inside a 43,641 MW fleet, plus 20-year PPAs with AWS (1,200 MW) and Meta (2,609 MW). The 2025 gas additions - Lotus (2,600 MW, closed October 2025) and pending Cogentrix (5,500 MW) - extend the merchant gas side, not the nuclear scarcity. Only the 433 MW of uprates extends the moat asset. |
| Moat type | switching costs The 10-K's Products section grounds the stickiness in test-program and capital reuse rather than in protected IP: the FLEX Test Platform runs 'The IG-XL™ software operating system which provides fast program development, including instant conversion from single to multi-site test', the J750 'shares the IG-XL software environment with the family of FLEX Test Platform systems,' and its instruments are 'coupled with a universal slot test head design that allows easy test system reconfiguration to address changing test needs.' The filing credits that versatility with making FLEX 'a widely used test solution at OSATs... allowing OSATs to leverage their capital investments.' The same 10-K expressly disclaims an IP-based moat: 'We do not believe that any single piece of intellectual property or proprietary rights is essential to our business.' | intangibles ip The durable advantage rests on decades of proprietary technology and IP — the 20-F describes ASML's April 2025 1,000-watt EUV light source as "built on 25 years of engineering advancements" — reinforced by an exclusive arrangement with Carl Zeiss SMT as its "sole supplier" of the critical optics no rival can source. | intangibles ip The intangibles are non-replicable regulatory assets rather than patents: six nuclear licences (Comanche Peak 2050/2053, Perry 2046, Davis-Besse 2037, Beaver Valley 2036/2047), fuel "contracted to support all our refueling needs through 2030", section 45U credits "recognizing the value of existing carbon-free nuclear power", and TXU Energy, sold "for over 20 years" and "registered and protected by trademark law". Read 45U as a floor, not moat strength: the 2025 credit was $220m against $545m in 2024, and it "provides increasing levels of support as unit revenues decline". Efficient scale does not apply. |
| Leadership | co leader The 10-K opens by calling Teradyne 'a leading global provider of automated test equipment and robotics solutions' - a leading provider, not the leader - and its Competition section names Semiconductor Test rivals non-exhaustively: competitors 'include, among others, Advantest Corporation, SPEA S.p.A., and Cohu, Inc.' It discloses no share figure and warns that competitors' announced products 'may be considered equal or superior to those we currently offer,' which reads as shared leadership rather than a clear lead. | clear leader Effectively 100% of the EUV market as the world's only EUV system maker; in the older DUV segment it "compete[s] primarily with Canon and Nikon" yet remains the leading supplier. | co leader Vistra describes itself as "one of the largest producers of power in deregulated markets in the U.S." with over 230 TWh generated, "one of the largest competitive power generators in the U.S. as measured by MWh of generation capacity", "one of the largest electricity generators in the U.S.", and "one of the largest competitive residential retail electricity providers". That hedged phrasing appears four times and is the strongest claim the filing makes. The 10-K names no competitor and assigns no rank, so co-leader is the ceiling the disclosure supports. |
| Pricing power | moderate Gross profit was 58.2% of total revenues in 2025 against 58.5% in 2024, and the 10-K attributes the 0.3-point decline to product mix; product gross margin fell 0.8 points to 57.3%. The risk factor 'Our operating results are likely to fluctuate significantly' lists 'competitive pressures on selling prices' among factors that 'could impact future operations,' and the same list cites the tendency of customers to 'wait until late in a quarter to commit to purchase... or the hope of obtaining more favorable pricing from a competitor seeking the business' - margin is defended, not expanded. | strong FY2025 gross margin of 52.8%, up 1.5 percentage points year over year, with management guiding toward 56-60% by 2030 — consistent with monopoly pricing power on EUV tools. | weak Vistra is a merchant price taker. Price formation rests on "the highest variable cost unit that clears the market", prices are "unpredictable and may fluctuate substantially", hedging markets have "limited liquidity after two to three years", and competing retailers "may offer different products, lower electricity prices and other incentives". ERCOT's $2,000/MWh figure is the low system-wide offer cap, applied conditionally when the peaker net margin exceeds three times CONE or under the PUCT Emergency Pricing Program, not a standing cap. PJM has "announced that it would propose" extending its capacity cap to 2028-29 and 2029-30, subject to FERC approval. |
| Summary | Teradyne sells the test step that sits between fabrication and shipment, and its hold on customers comes from platform continuity rather than patents. The FY2025 10-K describes one IG-XL software environment shared across the FLEX and J750 test families and a universal slot test head that lets a customer reconfigure a system to address changing test needs, which the filing credits with making FLEX widely used at OSATs because it lets them leverage their capital investments. The margin that continuity sits on is high but not rising: gross profit was 58.2% of revenue in 2025, which the filing records as a 0.3-point decrease from 2024 on product mix, with product margin down 0.8 points to 57.3% and service margin up 2.9 points to 62.9% - and the filing attributes that service gain to the May 2024 sale of the DIS business, not to the platform. It is a narrow moat, not a wide one: the filing names Advantest, SPEA and Cohu 'among others' in Semiconductor Test, warns of internal development at several customers, states that rival products may be 'equal or superior,' and discloses that the five largest direct customers rose to 44% of consolidated revenue in 2025 from 36% in 2024 - buyer power that caps how much of the platform advantage converts to price. | ASML is the sole producer of EUV lithography systems, the only tools able to pattern the most advanced logic and memory nodes, with a roadmap "intended to drive affordable scaling to 2030 and beyond" and a High-NA EUV (TWINSCAN EXE) platform on which customers "had run more than 400,000 wafers" by end-2025. That dominance is protected by 25 years of accumulated engineering IP and an exclusive lock on Carl Zeiss SMT optics that competitors cannot replicate. | Vistra's moat is one scarce asset wrapped in a commodity business. Six NRC-licensed nuclear units - 6,448 MW, licences running 2036-2053 - sit inside a 43,641 MW fleet that the 10-K says operates in the majority as "merchant" facilities with no long-term power sales agreements and no guaranteed rate of return. That block cannot be rebuilt by a rival, and is now partly de-risked by 20-year PPAs with AWS (1,200 MW from Comanche Peak) and Meta (2,609 MW from the PJM plants) plus section 45U credits. Everything else - 26,989 MW of gas, 8,743 MW of coal, the 5m-customer retail book - competes on price in markets Vistra does not set, against entrants the filing says keep building "despite relatively low power prices". The 2025 growth was gas M&A (Lotus, pending Cogentrix), which widens the commodity-exposed side. Narrow, for a specific reason: the moat is 15% of the fleet. |
| Chain position | Back-end capital equipment: its testers sit between fabrication and shipment, and the 10-K states that AI related customer demand drove the majority of revenue in the second half of 2025, with Semiconductor Test at 79% of consolidated revenue. | Upstream chokepoint of the AI chip supply chain: every leading-edge logic/DRAM wafer for AI accelerators is patterned on ASML EUV tools, making it the single indispensable equipment supplier to TSMC, Samsung and Intel. | Merchant IPP: sells energy, capacity and ancillary services into ISO/RTO spot and short-term wholesale markets (ERCOT, PJM, ISO-NE, NYISO, CAISO, MISO) and resells to ~5m retail customers. Emerging role as long-term nuclear offtake supplier to hyperscalers (AWS, Meta). Not a price setter at any link. |
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| Long-horizon vote | +0.13 at weight 0.20 · swarm bullish Editorial prior, not backtested. | +0.42 at weight 0.20 · swarm bullish Editorial prior, not backtested. | +0.05 at weight 0.20 · swarm neutral Editorial prior, not backtested. |