# Duncan Grierson

> Duncan Grierson is a seed investor backing Water, Medical and CleanTech. See 2 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Total investments: 2
- Last investment: Jul 2019
- Lead investor: 0%
- Last updated: Aug 2026

Duncan Grierson is a seed investor focused on Water and Medical. Duncan Grierson

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Water | 1 | 50% |
| Medical | 1 | 50% |
| CleanTech | 1 | 50% |
| Power Grid | 1 | 50% |
| Life Science | 1 | 50% |

8 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 50% |
| Series A | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Puraffinity | Puraffinity specialises in the design and development of precision materials, and has developed a sustainable novel adsorbent capable of removing highly challenging pollutants from contaminated water and wastewater. The technology utilises advanced supramolecular chemistry methods to functionalise sustainable materials designed to bind targetchemicals. The company is at the forefront of developing solutions for overcoming imminent water quality challenges, whilst sustainable and positive environmental impact lies at the heart of the company’s ethos. | $3.6M | Seed | Jul 31, 2019 |  |
| Moixa Technology | Moixa Technology develops the Maslow intelligent energy storage solution, enabling homes to store energy and benefit from revenue streams generated by trading energy through GridShare, an SaaS platform that aggregates energy from groups of Maslow energy storage systems. . The company develops smart DC technologies to power DC lighting, computing,electronics from grid-shifted storage or local PV from smart DC hubs, variable DC networks and sockets. The technology and IPR reduces grid peak by shifting DC device load and powering DC devices efficiently without inverters or AC/DC adaptors, together with providing smart control and energy management. The technology aims to address the 1 trillion kwh + lost annually in power conversion, and the significant growing DC demand in homes, offices from ICT, LED lighting and the rise in internet connected devices. | $1.3M | Series A | Jul 20, 2016 |  |

2 of 2 investments shown.

## Co-investors
- [HG Ventures](https://shizune.co/investors/profile/hg-ventures) — VC Fund, 1 deal together
- [Kindred Capital](https://shizune.co/investors/profile/kindredcapital) — VC Fund, 1 deal together
- [Verve Ventures](https://shizune.co/investors/profile/verve-ventures) — VC Fund, 1 deal together

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### Similar industry
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### Similar stage
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### Similar country
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## Featured in investor lists
- [Energy Angel Investors in United Kingdom](https://shizune.co/investors/energy-angel-investors-united-kingdom)
- [Life Science Angel Investors in United Kingdom](https://shizune.co/investors/life-science-angel-investors-united-kingdom)
- [Medical Angel Investors in United Kingdom](https://shizune.co/investors/medical-angel-investors-united-kingdom)
- [Life Science Angel Investors in Europe](https://shizune.co/investors/life-science-angel-investors-europe)
- [Manufacturing Angel Investors in United Kingdom](https://shizune.co/investors/manufacturing-angel-investors-united-kingdom)
- [Sustainability Angel Investors in United Kingdom](https://shizune.co/investors/sustainability-angel-investors-united-kingdom)

## FAQ

### What does Duncan Grierson invest in?

Duncan Grierson invests primarily in Water, Medical and CleanTech startups, most often at Seed and Series A stage. Most of the 2 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 Duncan Grierson last invest?

The most recent investment recorded for Duncan Grierson closed in Jul 2019. Shizune tracks 2 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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