# Cleantech investors in United Kingdom (2026 list)

> 135 cleantech investors in United Kingdom, 93% active in the last 12 months. Led by Techstars, Alumni Ventures, Plug and Play. Ranked by what they funded.

Source: https://millionrounds.com/lists/cleantech-investors-in-united-kingdom (Millionrounds; every figure on the page links to its filing or article)

[Investor Lists](https://millionrounds.com/lists)

# Cleantech investors in United Kingdom

Updated 7 November 2026

Firms observed backing a cleantech company in United Kingdom in the last two years, wherever the firm is based.

[See all 135 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fcleantech-investors-in-united-kingdom)The top 25

**135** investors on the list No change this week

**3,024** cheques in 12 months *-15%* against the market

**$7.1M** median round they joined *-11%* against the market median

**93%** wrote a cheque in 12 months

**57%** have led a round

## The Top 25

Ordered by cheques observed, never by anything anyone paid for

Deploying now (25)

- 1 [Techstars](https://millionrounds.com/fund/techstars) *Deploying now* VC firm · United States **2,989** **$1.2M** median round **Nov 2026** last seen
- 2 [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) *Deploying now* VC firm · United States **1,598** **$12M** median round **Nov 2026** last seen
- 3 [Plug and Play](https://millionrounds.com/fund/plug-and-play) *Deploying now* Accelerator · United States **1,561** **$5M** median round **Nov 2026** last seen
- 4 [MassChallenge](https://millionrounds.com/fund/masschallenge) *Deploying now* Accelerator · United States **984** **$1.8M** median round **Sept 2026** last seen
- 5 [EIC Accelerator](https://millionrounds.com/fund/eic-accelerator) *Deploying now* Government · European Union **875** **$4.3M** median round **Oct 2026** last seen
- 6 [Goldman Sachs](https://millionrounds.com/fund/goldman-sachs) *Deploying now* Private equity · United States **758** **$73M** median round **Oct 2026** last seen
- 7 [Antler](https://millionrounds.com/fund/antler) *Deploying now* VC firm · United Kingdom **729** **$1M** median round **Nov 2026** last seen
- 8 [Crowdcube](https://millionrounds.com/fund/crowdcube) *Deploying now* VC firm · United Kingdom **715** **$615K** median round **Sept 2026** last seen
- 9 [Innovate UK](https://millionrounds.com/fund/innovate-uk) *Deploying now* VC firm · United Kingdom **704** **$1.2M** median round **Oct 2026** last seen
- 10 [Tengxun Touzi](https://millionrounds.com/fund/tengxun-touzi) *Deploying now* VC firm · China **553** **$50M** median round **Nov 2026** last seen
- 11 [Global Brain Corporation](https://millionrounds.com/fund/global-brain-corporation) *Deploying now* VC firm · Japan **480** **$7.6M** median round **Sept 2026** last seen
- 12 [Creative Destruction Lab](https://millionrounds.com/fund/creative-destruction-lab) *Deploying now* Accelerator · Canada **427** **$3M** median round **Sept 2026** last seen
- 13 [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) *Deploying now* VC firm · United States **398** **$40M** median round **Nov 2026** last seen
- 14 [SFC Capital](https://millionrounds.com/fund/sfc-capital) *Deploying now* Angel network · United Kingdom **379** **$431K** median round **Nov 2026** last seen
- 15 [Octopus Ventures](https://millionrounds.com/fund/octopus-ventures) *Deploying now* VC firm · United Kingdom **355** **$10M** median round **Oct 2026** last seen
- 16 [Business Growth Fund](https://millionrounds.com/fund/bgf) *Deploying now* Private equity · United Kingdom **260** **$9.9M** median round **Nov 2026** last seen
- 17 [Scottish Enterprise](https://millionrounds.com/fund/scottish-enterprise) *Deploying now* Government · United Kingdom **256** **$2.1M** median round **Nov 2026** last seen
- 18 [Seedrs](https://millionrounds.com/fund/seedrs) *Deploying now* VC firm · United Kingdom **244** **$961K** median round **Sept 2026** last seen
- 19 [HSBC](https://millionrounds.com/fund/hsbc) *Deploying now* Growth equity · United Kingdom **234** **$45M** median round **Oct 2026** last seen
- 20 [Mizuho Corporate Bank](https://millionrounds.com/fund/mizuho-corporate-bank) *Deploying now* VC firm · Japan **217** **$9.5M** median round **Oct 2026** last seen
- 21 [Reach](https://millionrounds.com/fund/reach) *Deploying now* VC firm · Canada **217** **$5M** median round **Sept 2026** last seen
- 22 [Parkwalk](https://millionrounds.com/fund/parkwalk) *Deploying now* VC firm · United Kingdom **209** **$6.9M** median round **Oct 2026** last seen
- 23 [Artesian VC](https://millionrounds.com/fund/artesian) *Deploying now* Asset manager · Australia **201** **$2M** median round **Oct 2026** last seen
- 24 [Ascension](https://millionrounds.com/fund/ascension) *Deploying now* VC firm · United Kingdom **190** **$3.4M** median round **Oct 2026** last seen
- 25 [Blackbird Ventures](https://millionrounds.com/fund/blackbird-ventures-2) *Deploying now* VC firm · United States **177** **$7M** median round **Oct 2026** last seen

**110 more on this list**

All 135 are in the app, with filters for stage, sector and market. A free account shows 10 per search, Pro up to 1,000.

[See the whole list *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fcleantech-investors-in-united-kingdom)

## The Newest Cheques

Rounds this list's investors joined most recently

- **6** Nov **[Humble Robotics](https://millionrounds.com/company/humble-robotics)** Series A · $51M *With* [Energy Impact Partners](https://millionrounds.com/fund/energy-impact-partners)
- **5** Nov **[T-Therapeutics](https://millionrounds.com/company/t-therapeutics)** Series B · $133M *Led by* [British Business Bank](https://millionrounds.com/fund/national-security-strategic-investment-fund)
- **5** Nov **[Pure Data Centres Group](https://millionrounds.com/company/pure-data-centres-group)** Debt · $1.9B *With* [ABN AMRO Fund](https://millionrounds.com/fund/abn-amro-clearing)
- **5** Nov **[firmly](https://millionrounds.com/company/firmly)** Series A · $15M *With* [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund)
- **5** Nov **[Claimlane](https://millionrounds.com/company/claimlane)** Series A · $6.3M *With* [Verb Ventures](https://millionrounds.com/fund/verb-ventures)
- **5** Nov **[Alethio Therapeutics](https://millionrounds.com/company/alethio-therapeutics)** Series A · $90M *With* [Oxford Science Enterprises](https://millionrounds.com/fund/oxford-science-enterprises)

## Stages This Year

2,439 rounds

- Seed **20%**
- Venture **20%**
- Series A **16%**
- Pre-seed **9%**
- Debt **8%**
- Other **27%**

## What They Backed

Sectors, last 12 months

- AI **769**
- Biotech **201**
- Healthcare **154**
- Energy **152**
- Big Data & Analytics **124**
- Fintech **116**

## Cheques by Quarter

Led Joined

963 Q1 25

947 Q2 25

912 Q3 25

974 Q4 25

968 Q1 26

831 Q2 26

717 Q3 26

159 Q4 26

The last bar is the quarter still running.

## Lists Like This

- [AI investors in United States 3,683](https://millionrounds.com/lists/ai-investors-in-united-states)
- [Fintech investors in United States 1,166](https://millionrounds.com/lists/fintech-investors-in-united-states)
- [AI investors in United Kingdom 1,039](https://millionrounds.com/lists/ai-investors-in-united-kingdom)
- [Big Data & Analytics investors in United States 1,039](https://millionrounds.com/lists/big-data-investors-in-united-states)
- [Biotech investors in United States 914](https://millionrounds.com/lists/biotech-investors-in-united-states)
- [Energy investors in United States 798](https://millionrounds.com/lists/energy-investors-in-united-states)
- [Robotics investors in United States 797](https://millionrounds.com/lists/robotics-investors-in-united-states)
- [Construction investors in United States 742](https://millionrounds.com/lists/construction-investors-in-united-states)
- [Cybersecurity investors in United States 702](https://millionrounds.com/lists/cybersecurity-investors-in-united-states)

[All investor lists *→*](https://millionrounds.com/lists)

## Reading for founders in climate and energy

- Taming the Sun: Innovations to Harness Solar Energy and Power the Planet Varun Sivaram · 2018 4.06 from 510 ratings on Goodreads Climate and energy Innovation About the book How solar could spark a clean-energy transition through transformative innovation--creative financing, revolutionary technologies, and flexible energy systems. Solar energy, once a niche application for a limited market, has become the cheapest and fastest-growing power… On AmazonListen on Audible
- Race for Tomorrow: Survival, Innovation and Profit on the Front Lines of the Climate Crisis Simon Mundy · 2022 4.22 from 207 ratings on Goodreads Climate and energy Innovation Company building About the book In this extraordinary journey through twenty-six countries, Simon Mundy meets the people on the front lines of the climate crisis, showing how the struggle to respond is already reshaping the modern world – shattering communities, shaking up global business, and propelling a… On AmazonListen on Audible
- The Elements of Power: Gadgets, Guns, and the Struggle for a Sustainable Future in the Rare Metal Age David S. Abraham · 2015 4.06 from 264 ratings on Goodreads Climate and energy Company building About the book Our future hinges on a set of rare metals that few of us have even heard of. In this eye-opening book, a natural resource strategist reveals the critical importance of these transformative elements to our technological lifestyle and the consequences of our reliance upon them,… On AmazonListen on Audible
- Scale: The Universal Laws of Growth, Innovation, Sustainability, and the Pace of Life in Organisms, Cities, Economies, and Companies Geoffrey B. West · 2017 4.11 from 5,764 ratings on Goodreads Climate and energy Company building Innovation About the book The former head of the Sante Fe Institute, visionary physicist Geoffrey West is a pioneer in the field of complexity science, the science of emergent systems and networks. The term “complexity” can be misleading, however, because what makes West’s discoveries so beautiful is… On AmazonListen on Audible

More books for founders and investors on the [Reading List](https://millionrounds.com/reading-list?role=founder&industry=climate).

As an Amazon Associate we earn from qualifying purchases.

## Quick answers about cleantech investors in United Kingdom

### Who are the most active cleantech investors in United Kingdom?

By cheques observed, the most active are Techstars, Alumni Ventures, Plug and Play, MassChallenge and EIC Accelerator.

### How many cleantech investors in United Kingdom are there?

135 are on record. 93% made an investment in the last 12 months and 57% have led a round.

### Which stages do cleantech investors in United Kingdom back?

Of the rounds with a named stage in the last 12 months, mostly Seed (27%) and Series A (21%).

### How big are the rounds cleantech investors in United Kingdom join?

The typical (median) round among the leading investors here is $5M.

### Which sectors do cleantech investors in United Kingdom back most?

In the last 12 months, mostly AI, Biotech and Healthcare.

### Which cleantech investors in United Kingdom lead the most rounds?

Kleiner Perkins (33 led), Goldman Sachs (22 led) and Tengxun Touzi (20 led).

### Where are cleantech investors in United Kingdom based?

Among the most active, most are based in the United Kingdom (11), the United States (7) and Japan (2).

### What have cleantech investors in United Kingdom invested in recently?

Recent rounds include Humble Robotics (Series A, Nov 2026, with Energy Impact Partners), T-Therapeutics (Series B, Nov 2026, with British Business Bank) and Pure Data Centres Group (Debt, Nov 2026, with ABN AMRO Fund).

Built from the rounds we watched, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)