Investors / Helium-3 Ventures
Helium-3 Ventures
Venture capital
Helium-3 Ventures is an investment firm that backs founders building companies for earth and beyond. It lists a portfolio of companies spanning space, energy, robotics, AI, and consumer sectors, and offers founders support such as hiring, branding, office space in NYC, data, and company contacts.
Your fit with Helium-3 Ventures
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Or find every investor that fitsHelium-3 Ventures lists 29 checked portfolio companies on its own site and is named in 1 funding round. Its most frequent entry is Series A, 100% of the companies with a known first round. Its largest themes are AI & Machine Learning (24%), Industrial & Manufacturing (18%) and Education (12%). 86% of its companies are based in United States. It invests most often alongside Y Combinator, Evolution VC Partners and ARK Venture Fund.
Counts come from funding rounds that name Helium-3 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 Helium-3 Ventures' whole history. Rounds on record name 1 company; its own site lists 29. 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 roundHelium-3 Ventures does not state its stages on its site, so only what it does is shown.
Show as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 0% |
| Series A | 100% |
| Series B | 0% |
| 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 | 65th | 28 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 | 31th | 24% in its largest sector |
| Reach | 58th | 3 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 24% | 18% |
| Industrial & Manufacturing | 18% | 7% |
| Education | 12% | 7% |
| Enterprise Software | 8% | 8% |
| E-commerce & Marketplaces | 6% | 6% |
| Fintech | 6% | 12% |
| Healthcare & Biotech | 6% | 15% |
| Space & Defense | 4% | 3% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Y Combinator | 10 |
| Evolution VC Partners | 5 |
| ARK Venture Fund | 4 |
| Soma Capital | 4 |
| Capitoria | 3 |
| Gaingels | 3 |
| Lombardstreet Ventures | 3 |
| Moonshots Capital | 3 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers29100%
- 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 Helium-3 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 Helium-3 Ventures| Date | Company | Stage |
|---|---|---|
| 18 Mar 2025 | Series A |
Round details for Helium-3 Ventures
Amounts, full round histories and every co-investor in Helium-3 Ventures' rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
29 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Alga Biosciences improves agriculture by using algae to create a feed supplement that reduces methane emissions in cattle. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Apptronik provides solutions for businesses, including goods-to-person, person-to-goods, packout, kitting, inspection and sorting, and machine and tool tending. | Industrial & Manufacturing | Mar 2025Series A | Funding round | |
| Astranis designs, manufactures, tests, and operates geostationary orbit satellites for commercial and government customers. | Space & DefenseAI & Machine Learning | Portfolio page | ||
| Boom builds supersonic airliners and natural gas turbines from scratch | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Cart.com provides fulfillment, commerce, and government logistics services | E-commerce & MarketplacesFintech | Portfolio page | ||
| Contraline is a company developing investigational male contraceptive products, including a topical gel and a reversible implant. | Healthcare & Biotech | Portfolio page | ||
| DigiBuild automates the process of finding, ordering, tracking, and managing materials for construction projects | Real Estate & ConstructionAI & Machine Learning | Portfolio page | ||
| Engineered Arts creates humanoid robotics for business | Robotics & Hardware | Portfolio page | ||
| Exa provides a search API for AI agents to access real-time web data | AI & Machine LearningEnterprise Software | Portfolio page | ||
| Figure develops and uses a humanoid robot and artificial intelligence for household tasks | Robotics & HardwareAI & Machine Learning | Portfolio page | ||
| Genecis Bioindustries is a climate biotech company turning organic waste into sustainable, biodegradable materials | Climate & EnergyIndustrial & Manufacturing | Portfolio page | ||
| General Fusion develops fusion energy technology to produce usable energy | EducationIndustrial & Manufacturing | Portfolio page | ||
| LineLeap provides a mobile app and platform for users to skip lines, pay for cover, and buy tickets at bars, venues, and events. | Enterprise SoftwareEnterprise Software | Portfolio page | ||
| Machina builds and operates factories that use AI-guided robotics to manufacture complex metal structures. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Pair Eyewear sells customizable glasses and sunglasses | Healthcare & BiotechE-commerce & Marketplaces | Portfolio page | ||
| Pirouette Pharma develops a disc-shaped, push-button auto-injector for simplified injectable medicine | Healthcare & Biotech | Portfolio page | ||
| Princeton Nuenergy Technologies develops and provides lithium-ion battery recycling technologies and services. | EducationIndustrial & Manufacturing | Portfolio page | ||
| Quaise is developing an entirely new way to access geothermal energy | EducationIndustrial & Manufacturing | Portfolio page | ||
| Quidnet Energy develops and demonstrates Geomechanical Energy Storage technology to store and generate electricity | EducationIndustrial & Manufacturing | Portfolio page | ||
| Rho provides business banking and corporate card services for startups and scale-ups | FintechFintech | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- helium-3ventures.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 18 Mar 2025
- Companies checked
- 29
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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