Investors / United States / Fine Structure Ventures
Fine Structure Ventures
Venture capital · Cambridge, MA, United States · North America
Fine Structure Ventures is a venture capital firm that backs companies leveraging scientific breakthroughs worldwide. It focuses on early stage investments in disruptive scientific and technological innovation and takes board representation in most of its portfolio companies.
Invests inAI & Machine LearningIndustrial & Manufacturing
In its own wordsscientific innovationdeep techearly stagelife sciencestechnology
Your fit with Fine Structure Ventures
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See how your round matches what it backs, point by point.
Or find every investor that fitsFine Structure Ventures lists 26 checked portfolio companies on its own site and is named in 8 funding rounds, 4 of them as lead. Its most frequent entry is Series B, 50% of the companies with a known first round. Its largest themes are AI & Machine Learning (28%), Industrial & Manufacturing (28%) and Education (11%). 75% of its companies are based in United States. It invests most often alongside Engine Ventures, Collaborative Fund and Balerion Space Ventures.
Counts come from funding rounds that name Fine Structure Ventures, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Round figures show recent activity, not Fine Structure Ventures' whole history. Rounds on record name 7 companies; its own site lists 26. 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.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 17% |
| Series A | 33% |
| Series B | 50% |
| Growth | 0% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 4 | 2 |
| '26 | 4 | 2 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 62th | 26 companies |
| Recent activity | 86th | 5 rounds in 12 months |
| Early stage | 57th | 17% of entries at pre-seed or seed |
| Evidence | 80th | 12% of companies confirmed by a round |
| Sector focus | 44th | 28% in its largest sector |
| Reach | 70th | 4 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 28% | 18% |
| Industrial & Manufacturing | 28% | 7% |
| Education | 11% | 7% |
| Healthcare & Biotech | 9% | 15% |
| Robotics & Hardware | 4% | 1% |
| Mobility & Logistics | 4% | 1% |
| Climate & Energy | 4% | 1% |
| Food & Agriculture | 4% | 3% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Engine Ventures | 5 |
| Collaborative Fund | 4 |
| Balerion Space Ventures | 3 |
| Global Brain | 3 |
| Override | 3 |
| Safar Partners | 3 |
| ACVC Partners | 2 |
| Advection Growth Capital | 2 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers26100%
- No longer answers00%
- Points to another company00%
- 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 togetherCompare Fine Structure Ventures head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Fine Structure Ventures| Date | Company | Stage |
|---|---|---|
| 18 Jun 2026 | Seed Led | |
| 26 Mar 2026 | Series B Led | |
| 18 Feb 2026 | Series A | |
| 4 Dec 2025 | Series B Led | |
| 26 Aug 2025 | Round Led | |
| 19 Aug 2025 | Series B |
Round details for Fine Structure Ventures
Amounts, full round histories and every co-investor in Fine Structure Ventures' rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
26 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Aalo Atomics builds mass-manufactured nuclear power plants designed to power data centers and other applications | EducationIndustrial & Manufacturing | Aug 2025Series B | Page + round | |
| BoolSi compiles software functions into custom hardware accelerators | Robotics & HardwareAI & Machine Learning | Jun 2026Seed | Funding round | |
| Boston Metal produces high-value metals from a wide range of inputs using its Molten Oxide Electrolysis technology | Industrial & ManufacturingClimate & Energy | Portfolio page | ||
| Caelux is commercializing advanced energy materials to build the most powerful solar module, for the fastest, most cost-efficient new power generation. | EducationIndustrial & Manufacturing | Portfolio page | ||
| Commonwealth Fusion Systems is developing commercial fusion energy systems using high-temperature superconducting magnets and tokamak-based configurations. | EducationIndustrial & Manufacturing | Portfolio page | ||
| Constructive Bio designs and manufactures new-to-nature proteins for next-generation therapies. | Healthcare & Biotech | Portfolio page | ||
| Debut combines AI and biotechnology to create beauty products | Healthcare & Biotech | Aug 2025Round | Page + round | |
| DG Matrix manufactures solid-state transformers and provides solutions for AI data centers, utility, and fleet electrification. | AI & Machine LearningIndustrial & Manufacturing | Feb 2026Series A | Funding round | |
| femtoAI develops and provides AI silicon and compression platforms for everyday devices | AI & Machine LearningRobotics & Hardware | Portfolio page | ||
| Feon develops breakthrough electrolytes for next-generation battery chemistries using a pharmaceutical-inspired discovery platform | EducationIndustrial & Manufacturing | Portfolio page | ||
| Finwave Semiconductor develops and manufactures radio frequency switches and power amplifiers using Gallium Nitride on Silicon technology. | Space & DefenseIndustrial & Manufacturing | Portfolio page | ||
| Gilmour Space Technologies builds and operates an integrated launch vehicle, satellite platform and spaceport capability to provide flexible access to orbit for customers worldwide | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Portfolio page | ||||
| Hoxton Farms crafts fats using biomanufacturing | Food & AgricultureAI & Machine Learning | Portfolio page | ||
| Mainspring Energy delivers firm, flexible power when and where you need it. | Industrial & ManufacturingE-commerce & Marketplaces | Portfolio page | ||
| Mantle3D combines CNC machining with 3D printing of industry-standard tool steels to produce precision tooling. | Industrial & Manufacturing | Portfolio page | ||
| Nitricity makes plant-based, organic fertilizer using air, water, clean energy, and almond shells. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Nulixir develops and manufactures functional ingredients and beverages | Food & AgricultureHealthcare & Biotech | Portfolio page | ||
| Osmoses meets the world's smallest molecules with the planet's biggest challenge | Healthcare & BiotechClimate & Energy | Portfolio page | ||
| pH7 Technologies extracts critical and precious metals from primary and secondary resources using sustainable solutions. | Mobility & LogisticsIndustrial & Manufacturing | Dec 2025Series B | Funding round |
About this data
site last read 12 Nov 2026- Site
- finestructure.vc
- Last read
- 12 Nov 2026
- Watching since
- 6 Nov 2026
- Rounds since
- 29 Jan 2025
- Companies checked
- 26
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.
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