Investors / Nucleation Capital
Nucleation Capital
Venture capital
Nucleation Capital is a venture fund that invests in privately held ventures innovating in and around nuclear energy, including advanced fission, fusion and related atomic technologies, as well as carbon management and grid enhancement. It offers Fund I, Fund II and a syndicate through which accredited investors can invest alongside the firm.
Invests inEducationIndustrial & Manufacturing
In its own wordsadvanced nuclearcarbon managementgriddeep techclimateenergy transition
Your fit with Nucleation Capital
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsNucleation Capital lists 17 checked portfolio companies on its own site and is named in 1 funding round. Its most frequent entry is Series B, 100% of the companies with a known first round. Its largest themes are Education (42%), Industrial & Manufacturing (39%) and Space & Defense (9%). 75% of its companies are based in United States. It invests most often alongside Capital Factory, Timescale Ventures and Cantos.
Counts come from funding rounds that name Nucleation Capital, 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 Nucleation Capital's whole history. Rounds on record name 1 company; its own site lists 17. 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 | 0% |
| Series A | 0% |
| Series B | 100% |
| 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 | 1 | 0 |
| '26 | 0 | 0 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 44th | 17 companies |
| Recent activity | 46th | 0 rounds in 12 months |
| Early stage | 54th | 0% of entries at pre-seed or seed |
| Evidence | 66th | 6% of companies confirmed by a round |
| Sector focus | 76th | 42% in its largest sector |
| Reach | 70th | 4 countries |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Capital Factory | 3 |
| Timescale Ventures | 3 |
| Cantos | 2 |
| Critical Frontier | 2 |
| Crosscut | 2 |
| DCVC | 2 |
| Earth Venture Capital | 2 |
| Invariantes Fund | 2 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers17100%
- 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.
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| Education | 42% | 7% |
| Industrial & Manufacturing | 39% | 7% |
| Space & Defense | 9% | 3% |
| AI & Machine Learning | 3% | 18% |
| Climate & Energy | 3% | 1% |
| Healthcare & Biotech | 3% | 15% |
Co-investor network
who it backs companies with, and who they back togetherCompare Nucleation Capital head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Funds
from public registers and its siteRecent portfolio activity
when companies last raised with Nucleation Capital| Date | Company | Stage |
|---|---|---|
| 19 Aug 2025 | Series B |
Round details for Nucleation Capital
Amounts, full round histories and every co-investor in Nucleation Capital's rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
17 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 | |
| Apollo Atomics develops nuclear power systems. | EducationIndustrial & Manufacturing | Portfolio page | ||
| Blue Energy designs and builds nuclear power plants using a factory-based approach to reduce costs and construction time. | EducationIndustrial & Manufacturing | Portfolio page | ||
| Blykalla develops and deploys small modular nuclear reactors for clean energy production | EducationIndustrial & Manufacturing | Portfolio page | ||
| Copenhagen Atomics develops and manufactures molten salt reactors powered by thorium | EducationIndustrial & Manufacturing | Portfolio page | ||
| Core Power builds, integrates and deploys ship-based nuclear energy systems and the infrastructure that makes them possible. | EducationIndustrial & Manufacturing | Portfolio page | ||
| The company designs and develops a directional borehole disposal solution for nuclear waste | EducationIndustrial & Manufacturing | Portfolio page | ||
| Deployable Energy manufactures and develops compact, modular, transportable microreactor systems for various applications | EducationIndustrial & Manufacturing | Portfolio page | ||
| Focused Energy is commercializing laser fusion technology to produce energy | EducationIndustrial & Manufacturing | Portfolio page | ||
| Nuclearn develops and provides AI software for nuclear plants. | AI & Machine LearningIndustrial & Manufacturing | Portfolio page | ||
| Path Power provides equipment, support, and training for utility undergrounding projects. | EducationIndustrial & Manufacturing | Portfolio page | ||
| Planetary restores the chemistry of seawater to support life and protect the planet by introducing purified alkaline minerals into coastal outfalls | Climate & Energy | Portfolio page | ||
| Radiant develops and manufactures nuclear microreactors for commercial and government customers. | EducationIndustrial & Manufacturing | Portfolio page | ||
| SHINE Technologies engages in commercial markets and solves important problems while expanding capabilities needed for fusion energy, including testing, medical isotopes, recycling, and energy production. | EducationHealthcare & Biotech | Portfolio page | ||
| Syntholene Energy develops synthetic aviation fuel solutions | EducationEducation | Portfolio page | ||
| Twelve is a next-generation industrial company that advances how everyday products are made from the molecule up using its Power-to-X hydrocarbon platform. | Industrial & ManufacturingSpace & Defense | Portfolio page | ||
| Zeno Power develops nuclear batteries to generate reliable and clean energy for space and seabed applications | Space & DefenseSpace & Defense | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- nucleationcapital.com
- Last read
- 5 Nov 2026
- Watching since
- 6 Nov 2026
- Rounds since
- 19 Aug 2025
- Companies checked
- 17
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 Nucleation Capital's profile as data
Pull Nucleation Capital's portfolio, co-investors and changes through one API key or MCP, open every portfolio row, compare it with other firms, and get an email when it adds a company or files a fund.
Work email, sign-in link by email. Already have an account? Log in- Ask AI5 plain-English investor searches a day
- Full listsEvery portfolio row and two-firm overlap
- API and MCP100 REST or MCP calls a month, one key
- AlertsFollow 5 investors for portfolio and fund changes
$ curl -H "X-API-Key: YOUR_KEY" \
https://api.vcinfo.io/v1/firms/nucleationcapital.com
# also
GET /v1/firms/nucleationcapital.com/portfolio
GET /v1/firms/nucleationcapital.com/coinvestors
GET /v1/firms/nucleationcapital.com/news