# Jeff Twentyman

> Jeff Twentyman is a seed investor in London backing CleanTech, GreenTech and Energy Management. See 1 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Location: London, United Kingdom
- Total investments: 1
- Last investment: Feb 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/jefftwentyman/?originalSubdomain=uk

Jeff Twentyman is a seed investor in London focused on CleanTech and GreenTech. Jeff Twentyman

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| CleanTech | 1 | 100% |
| GreenTech | 1 | 100% |
| Energy Management | 1 | 100% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Heat Geek | Heat Geek is a designer and installer of energy systems. | $4.7M | Seed | Feb 29, 2024 |  |

1 of 1 investments shown.

## Co-investors
- [Transition](https://shizune.co/investors/profile/transition-c21b) — VC Fund, 2 deals together
- [Triple Point Ventures](https://shizune.co/investors/profile/triple-point) — VC Fund, 1 deal together

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### Similar industry
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### Similar stage
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## Featured in investor lists
- [Sustainability Angel Investors in United Kingdom](https://shizune.co/investors/sustainability-angel-investors-united-kingdom)
- [Impact Angel Investors in United Kingdom](https://shizune.co/investors/impact-angel-investors-united-kingdom)
- [Energy Angel Investors in United Kingdom](https://shizune.co/investors/energy-angel-investors-united-kingdom)

## FAQ

### What does Jeff Twentyman invest in?

Jeff Twentyman invests primarily in CleanTech, GreenTech and Energy Management startups, most often at Seed stage. Most of the 1 investments tracked by Shizune back companies in United Kingdom. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Jeff Twentyman last invest?

The most recent investment recorded for Jeff Twentyman closed in Feb 2024. Shizune tracks 1 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### 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.

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