Don't invest unless you're prepared to lose all the money you invest. These are high-risk investments and you are unlikely to be protected if something goes wrong. Take 2 mins to learn more.
Investing with Impact
Sustainable Ventures has built one of Europe’s leading climate tech ecosystem and has been at the forefront of UK climate investing for several years.
The previous Sustainable Accelerator Funds have invested in over 55 deep technology, highly scalable, climate tech focused companies, with three exits to date.
The SEIS Impact and EIS Impact Funds are open. To access the Fund documents please provide your details below.
Past performance is not a reliable indicator of future performance.
Our Track Record
The Funds were one of the first investors in companies such as Concrete4Change, Zeigo (exited to Schneider Electric), and Sennen (exited to Octopus Energy).
In 2024 we won the Early-Stage Investor of the Year Award from Business Green, as recognition for our work in the sector.
3*
Exits to date
(Zeigo, Sennen & Kuppa)
*As at 31st October 2025
58
Investments made
since 2017
55%
Of our portfolio companies have
at least one female founder
2.8x
Average Investment Multiple (inc.tax) for the previous 7 cohorts*
+£175m
Follow-on investment secured by investee companies
38%
Of our portfolio have either gender parity or majority female founder teams
Source: Sustainable Ventures Investment Management Ltd portfolio track record as at September 2025.
The previous seven Sustainable Accelerator cohorts invested between November 2017 and July 2015. The Investment multiple is the current value per £1 invested, and is based on partial or unrealised valuations and is therefore subject to change. Portfolio valuations are updated every six months, or more frequently if there is a material change e.g. due to an exit or an investee company failing. There is no appropriate benchmark for early stage companies by which to show a comparison. No warranty as to future outcome is implied nor should one be inferred.
Sustainable Ventures SEIS / EIS Impact Funds now OPEN
The Sustainable Ventures SEIS and EIS Impact Funds enable investors to back UK sustainability
and climate tech startups while benefitting from SEIS / EIS tax reliefs.
The SEIS Impact Fund
The Fund will invest into SEIS qualifying investments that have the potential, when at scale, to address one or more of the six sustainability objectives.
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The S stands for Seed, meaning earlier stage companies, which are typically higher risk.
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The government offers higher tax benefits, with 50% of the amount you invest comes off your tax bill as a UK taxpayer.
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The target return is £4 for every £1 invested by the Fund (net of fees) over seven years.
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Initial Fee: 3.5% + VAT for direct investors. Performance Fee: 25% ( + VAT) on returns over 1.25, meaning £1.25 for every £1.00 invested, calculated on a whole fund basis, not individual investments.
The EIS Impact Fund
The Fund will invest into EIS qualifying investments that have the potential, when at scale, to address one or more of the six sustainability objectives.
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Slightly later stage companies, still risky but typically more mature than SEIS rounds.
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With EIS, you will get 30% of the amount you invest off your income tax bill as a UK taxpayer.
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The target return is £3 for every £1 invested by the Fund (net of fees) over seven years.
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Initial Fee: 2.5% + VAT for direct investors. Performance Fee: 20% ( + VAT) on returns over 1.20, meaning £1.20 for every £1.00 invested, calculated on a whole fund basis, not individual investments.
The current funds opened in January 2025 and are evergreen, with a tranche closing every quarter. The Investment Manager is Sapphire Capital Partners LLP.
The tax treatment referred to above depends on the individual circumstances of each investor and may be subject to change in the future. Tax reliefs are not guaranteed and depend on personal circumstances and HMRC rules. In addition, the availability of any tax reliefs depends on the investee companies maintaining their qualifying status. SEIS and EIS investments involve buying shares in early-stage private companies. These shares are illiquid, difficult to value, and may not be realisable for many years, if at all. Investors should be prepared to lose their entire investment. This investment is not suitable for all investors as the underlying investments are illiquid. Please ensure you review the risk summary in detail.
Sustainable Accelerator Funds
(NOW CLOSED)
The previous Sustainable Accelerator Funds invested in over 50 deep technology, highly scalable, climate tech focused companies with three exits to date.
The seven cohorts invested between 2017 and 2025 with Republic Capital Adviser LLC (then known as Seedrs) as the Investment Manager.
The Funds will uniquely back companies that are developing solutions to one or more of the six sustainability challenges set out in the EU taxonomy:
Transition to Renewable Energy
Protection of Water Resources
Pollution Prevention & Control
Climate Change Mitigation
Climate Change Adaptation
Transition to a Circular Economy
Four sustainable investment labels have recently been introduced by the financial regulator to help investors find products that have a specific sustainability goal that is aligned with their investment objectives.
This fund has adopted the ‘Sustainability Impact’ label, meaning it invests mainly in solutions to sustainability problems, with an aim to achieve a positive impact for people or the planet
Read our short summary of our approach to sustainability here.
Join our next webinar
Every third Tuesday of the month we host a short webinar which is an opportunity to catch up on the investment strategy, highlights from the portfolio and an opportunity to find out more about the EIS and SEIS Impact Funds. Put your questions directly to the Fund Adviser.
Case Study
Sennen* was acquired by Octopus Energy’s smart energy platform Kraken Tech in December 2023, delivering a 3.4x return for investors in that fund.
This is an example of combining financial returns with long term sustainability outcomes as Sennen’s technology will supports Octopus Energy’s mission to “Make energy fair, clean, and simple for all using technology”.
"With renewable energy capacity set to triple globally, Sennen's focus on meeting the challenges faced by renewable project owners will be of increasing importance. Kraken is at the absolute vanguard of the energy transformation."
- Gaby Amiel, CEO of Sennen Tech
*Sustainable Accelerator Cohort 2 investment in July 2019.
Examples of valuation uplift* across previous portfolios:
(Stated as at 30 September 2025. Note the below is subject to change)
Past performance is not a reliable indicator of future performance. Other than for Zeigo, the valuation uplifts shown below are based on unrealised valuations and are therefore subject to change. No warranty as to future outcome is implied nor should one be inferred.
2019/20
2020/21
Unrealised Multiple Uplift
3.4x
2021/22
Unrealised Multiple Uplift
4.2x
2022/23
2022/23
Unrealised Multiple Uplift
8.8x
Unrealised Multiple Uplift
2.8x
2018/19
Unrealised Multiple Uplift
9.7x
Unrealised Multiple Uplift
5.9x
Realised Multiple Uplift
4.5x
Unrealised Multiple Uplift
4.1x
Unrealised Multiple Uplift
25.8x
Unrealised Multiple Uplift
10.1x
*Sustainable Ventures Investment Management Ltd portfolio track record as at September 2025. The Investment multiple is the current value per £1 invested, and is based on partial or unrealised valuations and is therefore subject to change. Portfolio valuations are updated every six months, or more frequently if there is a material change e.g. due to an exit or an investee company failing. Most early-stage investments fail or return less than capital invested. Tax reliefs depend on individual circumstances and may change; loss of relief is possible.
Inclusive investing
The Sustainable Ventures SEIS and EIS Impact Funds make climate-tech investing more accessible, with a minimum investment of only £5,000 - lower than most comparable EIS funds. So whilst they remain high risk, and therefore not appropriate for all retail investors, you don’t have to be a High Net Worth or Sophisticated Investor — Restricted Investors are also eligible to apply.
A restricted investor in the UK is an everyday investor - there’s no requirement for previous investment experience, or a minimum level of income or wealth. Instead, there are just two things they need to do: show that they understand the risks of investing in early-stage businesses, and commit to not investing more than 10% of their net assets in these kinds of investments each year.
We believe a more sustainable future should be built by all of us - so want to minimise the restriction on who can invest, so that more people have the opportunity to make a profit and make a difference - though success is by no means guaranteed.
First time investors will need to read and pay attention to the key documents and then register on Further as a restricted investor. Once registered, the investment process is simpler.
To find out more, head to the UK Regulator (the Financial Conduct Authority) website to see the rules they have put in place to protect people considering investing in shares in private companies where you can’t sell your shares once you have invested (non readily realizable securities or NRRS).
Sustainable Ventures Investment Management Limited is the appointed representative of Sapphire Capital Partners LLP, who are authorised and regulated by the Financial Conduct Authority with firm reference number 565716.
This web page constitutes a financial promotion pursuant to section 21 of the Financial Services and Markets Act 2000 ("FSMA") issued by Sapphire Capital Partners LLP (partnership number NC000562) whose registered office is at 28 Deramore Park, Belfast BT9 5JU (the “Authorised Person") and which is authorised and regulated by the Financial Conduct Authority ("FCA") (FCA Number: 565716). This financial promotion has been approved by Sapphire Capital Partners LLP on 15 December 2025. This promotion is directed only at investors who meet the FCA’s eligibility criteria.