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.
| Constellation Energy | Wiwynn | Cerebras Systems | |
|---|---|---|---|
| Moat rating | wide The FY2025 10-K describes the nation's largest nuclear fleet — approximately 22 GW across 14 stations producing 68% of 2025 electric supply — running at a 94.7% capacity factor that 'has been approximately four percentage points better than the industry average annually since 2013', with NRC licences extending to 2054 and an IRA nuclear production tax credit floor from 2024. | narrow The 2025 annual report (published 2026-04-30) shows a real but shallow position: products deployed in "more than 750 hyperscale data centers" and, on the Company's own internally assessed shipment volume, "more than 10% of global server shipments and nearly 30% of global ODM-Direct server shipments" in 2025 — while the same report's own list of negative factors names "Excessive concentration of customers" and a market "getting more and more competitive", discloses three customers at 41.48%, 26.03% and 10.43% of 2025 net sales, and reports 2025 gross profit up 109.77% against revenue up 163.68% for an 8.3% gross margin. Defensible incumbency, not a durable one. | narrow One-of-a-kind silicon sold to very few buyers: the IPO prospectus discloses G42 at 24.0% of 2025 revenue (85.0% in 2024), MBZUAI at 62.0% of 2025 revenue, and a December 2025 MRA with OpenAI representing 'a substantial portion of our projected revenues over the next several years' — against a competitive field the same document names as NVIDIA, AMD, Intel, hyperscaler accelerators and the major clouds. |
| Moat type | cost scale The cited edge is operating cost at scale: average refuelling outages of 22 days in 2025 against industry averages of 33 and 38 days in 2024 and 2023, a capacity factor about four points above the industry every year since 2013, and 'significant economies of scale' in what the filing calls the largest US customer-facing energy platform. | switching costs The report's "Competitive niche" section locates the advantage in the customer program rather than in IP or unit cost: "highly customized solutions for hyperscale data centers", "end-to-end technical integration capabilities ranging from server design and system integration to large-scale L10/L11 rack-level delivery", and a one-stop service "covering product design, integration, optimization, deployment, and after-sales services" across a base of more than 750 hyperscale data centers. Every advantage the section claims is about integration work and customer proximity, none about patents or proprietary silicon, and an 8.3% gross margin is not the profile of a cost advantage; what is left is the friction in an installed, co-designed rack program. | intangibles ip Wafer-scale integration is the moat's substance: the prospectus contrasts the WSE-3's 4 trillion transistors on 46,225 mm² of silicon with NVIDIA's B200 at 208 billion on roughly 1,600 mm² — a commercial chip category with one occupant. |
| Leadership | clear leader The 10-K states Constellation is 'the largest nuclear energy company in the U.S.', is 'the nation's largest energy supplier for C&I and residential power volumes' based on EEI data, and has 'over 32% of the C&I market share of direct customer business'. | co leader The report claims "nearly 30% of global ODM-Direct server shipments" for 2025 on internally assessed volume, against an IDC Worldwide Quarterly Server Tracker base of approximately 7.7 million ODM-Direct units within roughly 16.78 million total 2025 server shipments — yet describes the Company only as "one of the major suppliers to international hyperscale data centers". Among the largest in its segment; the report makes no claim to be first. | clear leader Scoped to the category the record supports: wafer-scale integration has no other commercial occupant per the prospectus's own comparison, and the Q2 release claims — attributed, via AMD and AWS partnerships — leadership in disaggregated inference, a technique the prospectus defines. |
| Pricing power | moderate The 10-K states 'While providing customers with a competitive price is a key focus' in retail, on roughly two-year average C&I contract terms with 77% power and 84% gas renewal rates in 2025, and the nuclear fleet's downside is set by the IRA nuclear PTC 'as unit revenues decline below levels established in the IRA'; SEC-reported operating income was 13.6% of revenue in 2025. | weak 2025 gross margin was 8.3% and operating margin 6.7%; gross profit rose 109.77% while revenue rose 163.68%, so the margin narrowed as volume grew. The report discloses three customers at 41.48%, 26.03% and 10.43% of 2025 net sales, lists "Excessive concentration of customers" among its negative factors, and explains its main-supplier table with "The suppliers are designated by customers." | moderate The CFO states Q2 'significantly improved core gross and operating margins compared to a year ago' — improving, from a base where three named customers hold most of the revenue and the leverage that comes with it. |
| Summary | Constellation pairs the largest US nuclear fleet with the largest competitive retail book, which lets it sell around-the-clock carbon-free power under long-term contracts such as the 20-year Microsoft PPA restarting Three Mile Island Unit 1 as the 835 MW Crane Clean Energy Center. | Wiwynn sells ODM-Direct — it designs and builds cloud and AI server systems to hyperscale operators' specifications rather than shipping a branded product — and the 2025 annual report grounds its edge in that relationship: "highly customized solutions", integration "from server design and system integration to large-scale L10/L11 rack-level delivery", Open Compute Project participation described as "a core competitive advantage in marketing to global hyperscale data centers", and products deployed in more than 750 hyperscale data centers as of the end of 2025. The report also says that high integration and testing abilities "increases the threshold of vendors in the assembly industry and creates entry barriers". Against that, the same report lists excessive customer concentration and an increasingly competitive market as its negative factors, discloses customers at 41.48%, 26.03% and 10.43% of 2025 net sales, explains its main-supplier table with "The suppliers are designated by customers", and reports an 8.3% gross margin on 2025 revenue of NT$950.66bn. | Cerebras bet that AI compute should be one enormous chip rather than many small ones — 'quantities of compute and memory never before assembled on a single commercial chip,' avoiding 'the latency and the power-draw induced by the traditional approach,' in the prospectus's words — and is converting that bet into an inference cloud: Q2 2026 cloud revenue grew 281% with 600 MW of data center capacity under contract and $25.4 billion of remaining performance obligations. The concentration that funded the bet is the risk that remains: two related-party Gulf customers were 86% of 2025 revenue between them, with the OpenAI MRA now layered on top. |
| Chain position | Generator and retailer in one — the fleet is the physical supply behind the long-term carbon-free contracts it sells to large corporate buyers. | The report's cloud/AI-server value-chain diagram places system assembling in the midstream and "Direct sales from original manufacturers" downstream selling to cloud service providers; Wiwynn describes itself as providing "IT equipment and rack system integration service to hyperscale data centers". 82.12% of 2025 revenue came from America. | Layer-4 wafer-scale accelerators plus an inference cloud — hardware vendor and specialized cloud in one node. |
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| Long-horizon vote | +0.38 at weight 0.20 · swarm neutral Editorial prior, not backtested. | +0.05 at weight 0.20 · swarm bearish Editorial prior, not backtested. | +0.20 at weight 0.20 · swarm bearish Editorial prior, not backtested. |