# CarbonFix

> CarbonFix is a VC fund backing Sustainability and Environmental Consulting. See 5 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Amsterdam, The Netherlands
- Total investments: 5
- Last investment: Jul 2026
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/carbon-fix/
- Website: https://carbonfix.org/

CarbonFix is a network of climate innovators. It acts as a foundation to support initiatives and help them scale-up by connecting them to people, relevant expertise or adjacent industries.

## Contacts

5 contacts available for CarbonFix. Shizune tracks 1 team members at CarbonFix. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/carbonfix?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $1.2M–$5.4M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Sustainability | 2 | 40% |
| Environmental Consulting | 2 | 40% |
| CleanTech | 1 | 20% |
| Recycling | 1 | 20% |
| Agriculture | 1 | 20% |

10 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 3 | 60% |
| Pre-Seed | 2 | 40% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| The Netherlands | 2 | 40% |
| Canada | 1 | 20% |
| Belgium | 1 | 20% |
| United States | 1 | 20% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Siemon van den Berg | Founder | 0 | https://shizune.co/investors/profile/siemon-van-den-berg |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| StratX | StratX installs engineered landfill covers that destroy methane and lock away carbon dioxide, while financing and operating the systems at no cost to the landfill. | $1.2M | Seed | Jul 14, 2026 |  |
| Astracite | Astracite designs next-generation, climate-positive graphite-silicon composite anode materials explicitly engineered for lithium-ion batteries. The business model addresses global supply chain and environmental vulnerabilities by transforming captured carbon dioxide emissions into high-performing battery components via an eco-friendly processpowered by green electricity. By structurally embedding silicon into a specialized carbon matrix, the company delivers a fivefold capacity boost over traditional synthetic graphite while maintaining an ultra-low manufacturing footprint. | $870.7K | Pre-Seed | Jun 16, 2026 |  |
| Skyrenu Technologies | Skyrenu Technologies develops and markets direct atmospheric systems based on its patented technology. |  | Pre-Seed | Jun 03, 2025 |  |
| DOPS Recycling Technologies | DOPS Recycling Technologies is developing a circular technology for converting complex waste flows into raw materials for new products. | $5.4M | Seed | Mar 27, 2025 |  |
| SeaO2 | SeaO2 is an ocean carbon removal startup that offers scalable carbon dioxide removal technology at the giga-ton level. It aims to prevent global warming by lowering CO₂ concentrations in the water and indirectly in the atmosphere. | $2.2M | Seed | Nov 04, 2024 |  |

5 of 5 investments shown.

## Co-investors
- [Alphatron Group B.V.](https://shizune.co/investors/profile/alphatron-group-b-v) — VC Fund, 1 deal together
- [ATechX Accelerator](https://shizune.co/investors/profile/atechx-accelerator) — VC Fund, 1 deal together
- [Carbon13](https://shizune.co/investors/profile/carbon13) — VC Fund, 1 deal together
- [DOEN Participaties](https://shizune.co/investors/profile/doen-foundation) — VC Fund, 1 deal together
- [Future Tech Ventures](https://shizune.co/investors/profile/future-tech-ventures) — VC Fund, 1 deal together
- [Init Power](https://shizune.co/investors/profile/init-power-a4df) — VC Fund, 1 deal together

## Similar investors

### Similar industry
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Breakthrough Energy Ventures](https://shizune.co/investors/profile/breakthrough-energy-ventures) — VC Fund
- [Shell Ventures](https://shizune.co/investors/profile/shell-technology-ventures) — VC Fund

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

### Similar country
- [PMV](https://shizune.co/investors/profile/pmv-eu) — VC Fund
- [Limburgse Reconversie Maatschappij](https://shizune.co/investors/profile/limburgse-reconversie-maatschappij) — VC Fund
- [Qbic Fund](https://shizune.co/investors/profile/qbic-fund) — VC Fund

## Featured in investor lists
- [Clean Energy Investors in Belgium](https://shizune.co/investors/clean-energy-investors-belgium)

## FAQ

### What does CarbonFix invest in?

CarbonFix invests primarily in Sustainability, Environmental Consulting and CleanTech startups, most often at Seed and Pre-Seed stage. Most of the 5 investments tracked by Shizune back companies in The Netherlands. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is CarbonFix's check size?

CarbonFix typically joins rounds of $1.2M–$5.4M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds CarbonFix participates in.

### How do I contact CarbonFix?

Public channels for CarbonFix include LinkedIn and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Who are the partners at CarbonFix?

The team at CarbonFix includes Siemon van den Berg (Founder). The Team section lists each member with their title, investment count and links.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

# About Shizune
Shizune.co is an investor database. Core features:
- 48,091 startup investors (angels, VCs, accelerators, and others)
- Email, phone, LinkedIn (for intros), socials, and other contact data
- Updated daily from public funding news
- CSV and Excel export

The User can access the full database FOR FREE after signing up: shizune.co