Investors / Prefix Capital
Prefix Capital
Venture capital
Prefix Capital is a venture capital firm whose founding partners invest in early-stage deep technology companies. The team handles diligence, investment management and operational tasks in-house.
Invests inAI & Machine LearningHealthcare & BiotechIndustrial & Manufacturing
In its own wordsdeep techearly stageartificial intelligencesemiconductorsbiotechconsumer electronics
Your fit with Prefix Capital
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsPrefix Capital lists 15 checked portfolio companies on its own site. Its largest themes are AI & Machine Learning (33%), Healthcare & Biotech (17%) and Industrial & Manufacturing (17%). 100% of its companies are based in United States. It invests most often alongside Civilization Ventures, IndieBio and SOSV.
No funding round on record names Prefix Capital yet, so the figures come from its portfolio page.
Round figures show recent activity, not Prefix Capital's whole history. Rounds on record name 0 companies; its own site lists 15. Funding rounds are complete from mid-2025, so counts and the yearly trend undercount a firm that invested before then. The portfolio, themes and places come from its own site and are not affected.
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 33% | 18% |
| Healthcare & Biotech | 17% | 15% |
| Industrial & Manufacturing | 17% | 7% |
| Cybersecurity | 13% | 4% |
| Enterprise Software | 8% | 8% |
| Fintech | 4% | 12% |
| Space & Defense | 4% | 3% |
| Food & Agriculture | 4% | 3% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Civilization Ventures | 4 |
| IndieBio | 2 |
| SOSV | 2 |
| +ND Capital | 1 |
| ARTIS | 1 |
| Acequia Capital | 1 |
| Air Street Capital | 1 |
| Black Diamond Ventures | 1 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 39th | 15 companies |
| Recent activity | 46th | 0 rounds in 12 months |
| Early stage | 54th | 0% of entries at pre-seed or seed |
| Evidence | 52th | 0% of companies confirmed by a round |
| Sector focus | 62th | 33% in its largest sector |
| Reach | 20th | 1 country |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers1280%
- No longer answers00%
- Points to another company320%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with Civilization Ventures
Compare Prefix Capital head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Portfolio
15 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Base Operations provides street-level threat intelligence for corporate security | CybersecurityAI & Machine Learning | Portfolio page | ||
Industrial & ManufacturingCybersecurity | Portfolio page | |||
| Diamond Foundry develops and manufactures semiconductor-grade single-crystal diamond substrates for AI chips and other applications | Industrial & ManufacturingAI & Machine Learning | Portfolio page | ||
| Epoch builds products and research at the frontier of autonomous software | AI & Machine LearningEnterprise Software | Portfolio page | ||
AI & Machine LearningEnterprise Software | Portfolio page | |||
| Portfolio page | ||||
| The company provides online doctor and telehealth services. | Healthcare & Biotech | Portfolio page | ||
| Manus Bio manufactures bioalternatives, including sweeteners and ingredients, using industrial biotechnology | Food & AgricultureIndustrial & Manufacturing | Portfolio page | ||
| Neocortix develops and applies various artificial intelligence technologies, including large language models and machine learning methods | AI & Machine Learning | Portfolio page | ||
| Neutrolis is a clinical-stage biotechnology company developing first-in-class neutrophil extracellular trap (NET)-degrading therapies for autoimmune and inflammatory diseases. | Healthcare & Biotech | Portfolio page | ||
| Prellis Biologics discovers and develops therapeutics using a platform that integrates human biology with machine learning | Healthcare & Biotech | Portfolio page | ||
| The company provides compliance management software for water utilities. | Healthcare & BiotechIndustrial & Manufacturing | Portfolio page | ||
| Symmetry Systems provides a data and AI security platform that connects every identity to every data object and every AI agent | CybersecurityAI & Machine Learning | Portfolio page | ||
| Tractable develops and provides artificial intelligence solutions for vehicle damage assessment and other industry challenges | AI & Machine LearningFintech | Portfolio page | ||
Space & DefenseAI & Machine Learning | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- prefixcapital.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Companies checked
- 15
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
Get Prefix Capital's profile as data
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