SemiAnalysis Capital Research
Investment Thesis
SemiAnalysis Capital is the newly formed venture investing arm of SemiAnalysis, the semiconductor and AI infrastructure research and consulting firm founded by Dylan Patel in 2020. SemiAnalysis has built its reputation as the preeminent independent authority on the semiconductor supply chain, datacenter buildouts, and AI training/inference infrastructure, publishing deeply technical research consumed by 180,000+ subscribers and institutional clients. SemiAnalysis Capital converts that research edge into direct investing: the firm backs the physical bottlenecks of the AI buildout, including accelerators, memory, networking silicon, and the compute and power infrastructure beneath frontier AI systems, arguing that its supply-chain visibility and technical diligence give it an edge in evaluating deep-tech hardware bets that generalist funds often can't underwrite.
Sector Focus
The firm invests exclusively in the semiconductor and AI-infrastructure stack:
- AI inference and training accelerators / custom silicon
- Memory-first and non-HBM-dependent chip architectures
- AI networking, interconnect, and datacenter systems silicon
- Silicon security and root-of-trust infrastructure
- Decentralized and distributed AI compute/training platforms
- Frontier AI model research labs
It explicitly avoids application-layer consumer software and businesses outside the compute/silicon/power stack.
Stage Focus
Dylan Patel's investing activity, which predates and now feeds into the formal fund, spans a wide range: personal seed and Series A angel checks in 2025 (zeroRISC, Prime Intellect, an early Positron round) through a growth-stage Series C co-lead in September 2026 (Positron AI). SemiAnalysis Capital Fund I, LP filed an SEC Form D-type exemption notice on 2026-07-29 targeting roughly $400M, positioning the vehicle to write both venture-stage and growth-stage checks into AI infrastructure and chip companies.
Check Size
No confirmed typical check size has been disclosed. The fund's reported ~$400M target and its participation as a named co-leader in Positron AI's $375M (Series C) and subsequent $500M (Series C-1) tranches suggest capacity for meaningful growth-stage checks, but individual ticket sizes are not public.
Lead Tendency
Mixed. Patel's earlier personal stakes (zeroRISC, Prime Intellect) were follow-on participations behind other leads (Founders Fund, Fontinalis Partners). SemiAnalysis Capital was named as one of five co-leads (alongside NEA, Atreides Management, Valor Equity Partners, and Andra Capital) on Positron AI's Series C, and Dylan Patel took a board seat as part of that round — a notable step up in involvement and conviction.
Recent Activity
- September 2026: Co-led Positron AI's $875M Series C (two tranches: $375M Series C at a $3.5B pre-money valuation, plus a $500M Series C-1) at a $5B post-money valuation, alongside NEA, Atreides Management, Valor Equity Partners, Andra Capital, and Jim Clark. Dylan Patel joined Positron's board of directors.
- July 2026: SemiAnalysis Capital Fund I, LP filed an SEC exemption notice (Investment Company Act Sections 3(c)(1) and 3(c)(7)), formalizing a reported ~$400M fund-raising effort for AI infrastructure and chip investments.
- 2025: Prior to the fund's formation, Dylan Patel personally built a portfolio of roughly 20 AI-infrastructure and chip startup stakes, including disclosed investments in Positron (Series A), Prime Intellect (seed/Series A), zeroRISC (seed), Enfabrica, Thinking Machines Lab, and a $50M vehicle specifically to invest in Fluidstack.
Portfolio Highlights
- Positron AI (positron.ai) – Memory-first AI inference hardware; Reno, NV. Raised a $5B-valuation Series C in Sept 2026 with Dylan Patel on the board; clients include Oracle Cloud Infrastructure, Jump Trading, and i3d.net.
- Prime Intellect (primeintellect.ai) – Decentralized/distributed AI training and inference stack; raised $15M led by Founders Fund with Menlo Ventures and Andrej Karpathy.
- zeroRISC (zerorisc.com) – Commercial silicon root-of-trust security built on the open-source OpenTitan project; raised a $10M seed.
- Enfabrica (enfabrica.net) – AI networking silicon (GPU network interface controllers); Mountain View, CA.
- Thinking Machines Lab (thinkingmachines.ai) – Frontier AI research lab founded by former OpenAI CTO Mira Murati.
- Fluidstack – AI cloud/GPU infrastructure and datacenter buildout; Patel raised a dedicated $50M vehicle to invest specifically in this company.
No exits have been reported; the portfolio is entirely active, recent positions.
Team
- Dylan Patel, Founder & CEO – Founded SemiAnalysis in 2020 and built it into the leading independent semiconductor/AI research and consulting firm. Since 2025 he has personally built a roughly 20-company angel portfolio in AI infrastructure and chips, which now underpins SemiAnalysis Capital's institutional fund. He sits on Positron AI's board as of September 2026. No other named investing partners have been publicly disclosed; the firm currently operates as a solo-GP structure layered on top of SemiAnalysis's broader research team.
Decision Process
Solo GP. All disclosed investments and the board seat are attributed to Dylan Patel personally; no co-investing partner or investment committee has been publicly named at SemiAnalysis Capital.
Founder Preferences
The firm favors technical, deeply domain-expert founders building differentiated hardware or infrastructure — the kind of founders whose claims can be underwritten by SemiAnalysis's own supply-chain and performance-benchmarking research (e.g., Positron's memory-first architecture claims, validated in part by SemiAnalysis's own TCO and hardware benchmarking work).
Geographic Focus
Primarily United States. The firm/fund entity is associated with a Denver, CO address (per fund registration data), while portfolio companies are concentrated in the traditional US tech hubs (Reno, NV; Mountain View and San Francisco, CA).