For investors

Capital for the
Climate
Emergency.

We build and back Europe's most promising climatetech ventures. Whether you're exploring our SEIS Fund, interested in an LP position, or want to invest directly into one of our portfolio companies, we'd love to hear from you.

300+
Ventures built since 2021
£100m+
Raised by our ventures
500M
Potential tonnes CO₂e (net)

Get in touch

Not sure what's right for you? Tell us a little about yourself and our investment team will be in touch.

We won't share your data. Privacy policy. This is a high-risk investment. Risk summary.

Investment pathways

Two ways to invest
with Carbon13

Each route is structured differently, with its own risk profile, tax treatment, minimum commitment and eligibility requirements. Select a pathway to learn more.

Tax Efficient · UK Investors · Fund X Open Now

SEIS Fund

Seed Enterprise Investment Scheme · Fund X open now

Tax-efficient exposure to a diversified portfolio of pre-seed climate ventures, built through our Venture Builder programme in Cambridge. For individual investors seeking both financial returns and measurable climate impact in the 2026/27 tax year.

  • Up to 50% income tax relief on your investment
  • Capital gains tax exemption after 3 years
  • Loss relief available if a venture fails
  • Minimum investment: £10,000
  • Managed by Syndicate Room
Explore SEIS Fund →
Institutional · Qualified Investors Only

LP Fund

Limited Partner · Carbon13 I SCSp

Our institutional fund vehicle for professional and sophisticated investors seeking portfolio-level exposure to the climatetech asset class. Structured as a Luxembourg SCSp, advised by Carbon13 Capital Limited.

Designed to focus follow-on capital on ventures showing the strongest progress from our programmes, from Pre-seed to Series A.

  • Diversified across UK, EU and Accelerator programmes
  • Proprietary dealflow, we build our startups
  • Luxembourg SCSp; its AIFM (AQ1443 Lux Sàrl) is advised in relation to the fund by Carbon13 Capital Limited, an Appointed Representative of an FCA-authorised firm
  • Qualified professional investors only
Explore LP Fund →

Our edge

We don't source deals.
We build them.

Carbon13 is a venture builder first. Our investors access proprietary dealflow that no one else can offer, because we created it from scratch through our Venture Builder programmes in Cambridge and Berlin.

01
Proprietary Dealflow
We build our startups from scratch through our Venture Builder programmes. We invest before anyone else, at the earliest possible stage, with maximum information advantage.
02
Deep Domain Network
400+ domain experts in science, technology, industry and fundraising give every venture a structural advantage unavailable at any other fund of comparable size.
03
Carbon at the Core
Every venture must demonstrate potential to mitigate at least 10M tonnes of CO₂e per year at scale. Impact is a filter, not a badge; it is built into every investment thesis.
04
Tier-1 Follow-ons
Octopus Ventures, Planet A, Pale Blue Dot, Ada Ventures and Cambridge Enterprise have all followed on into Carbon13 portfolio companies, independently validating venture quality.
500M
Potential tonnes CO₂e (net)
300+
Ventures built since 2021
100+
Ventures invested in since 2021
£230m+
Total portfolio market value
64%
Female co-founders

Follow-on investors in Carbon13 portfolio companies

Octopus Ventures Ada Ventures Cambridge Enterprise Planet A Ventures Pale Blue Dot Regeneration.VC Extantia Plug and Play SOSV

General enquiries

Not sure where
to start?

Whether you're exploring SEIS for the first time, considering an LP position, or simply want to learn more about our portfolio companies, our investment team is happy to help you find the right fit.

Send us a message

We won't share your data. Privacy policy. This is a high-risk investment. Risk summary.

The Venture Builder for the Climate Emergency.
Cambridge & Berlin.

Carbon13 Capital Limited (FRN: 953220) is an Appointed Representative of AQ1443 Limited, an FCA authorised and regulated entity (FRN: 978496), in relation to their role as investment advisor to Carbon13 I SCSp. This website is not an offer to buy or sell securities and does not constitute a Direct Offer Financial Promotion. Applications for investment may only be made on the basis of the relevant documentation, copies of which are available on request. © 2026 Carbon13, Salisbury House, Station Road, Cambridge, CB1 2LA. All rights reserved.