# Martlet Capital

> Martlet Capital is a VC fund backing Health Care and Biotechnology. See 55 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Cambridge, United Kingdom
- Total investments: 55
- Last investment: Nov 2024
- Lead investor: 13%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/martlet
- X (Twitter): https://twitter.com/MartletCapital
- Website: http://www.martletcap.com

Martlet Capital is an early-stage investor based in Cambridge, providing patient capital to deep technology and life science startups with high growth potential.They seek to support entrepreneurs with value beyond capital. They have experience of helping companies scale from first-round through to exit. Visit their website to take a look at howwe work and their investment focus.

## Contacts

5 contacts available for Martlet Capital. Shizune tracks 2 team members at Martlet Capital. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/martlet?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $525k–$7.5M |
| Pre-Seed | $191k–$1.2M |
| Series A | $1M–$9.5M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Health Care | 9 | 16% |
| Biotechnology | 9 | 16% |
| Software | 8 | 15% |
| Medical | 5 | 9% |
| Sensor | 4 | 7% |

78 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 30 | 55% |
| Series A | 10 | 18% |
| Pre-Seed | 4 | 7% |
| Series B | 3 | 5% |
| Angel | 2 | 4% |

7 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United Kingdom | 41 | 75% |
| United States | 2 | 4% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Alan Cowley | Investment Analyst | 0 | https://shizune.co/investors/profile/alan-cowley |
| Robert Marshall | Founder, Chief Executive Officer & Executive Chairman | 1 | https://shizune.co/investors/profile/robert-marshall-6b82 |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| AllFocal Optics | AllFocal Optics revolutionizes display technology through groundbreaking nanophotonic solutions. | $3.6M | Seed | Nov 06, 2024 |  |
| Infinitopes | Infinitopes is a cancer research organization whose mission is to strengthen the immune system so that it can stop metastases and save lives. The company's platform creates healthcare systems and therapy designs to integrate high-efficiency vector delivery systems with optimal tumor target identification technologies in early-stage clinicaltrials, allowing patients to prevent cancer and tumors from taking their lives | $16M | Seed | Apr 30, 2024 |  |
| Xampla | Xampla creates plant protein material for commercial use. Our next generation material performs like synthetic polymers, but decomposes naturally and fully, without harming the environment. | $7.2M | Series B | Jan 30, 2024 |  |
| Xampla | Xampla creates plant protein material for commercial use. Our next generation material performs like synthetic polymers, but decomposes naturally and fully, without harming the environment. | $7M | Venture - Series Unknown | Jan 30, 2024 |  |
| OctaiPipe | OctaiPipe is a Federated Learning Operations (FL-Ops) architecture developed exclusively for Edge AIoT devices. It simplifies the entire lifecycle, from setup and training to smooth deployment, fine-tuning, and continuous learning. This allows data scientists to develop distributed IoT solutions that can learn and adapt at scale while lowering thecost of monitoring, maintenance, upgrades, and auditing. | $3.9M | Seed | Jan 23, 2024 |  |
| Spotta | Spotta is a provider of smart pest systems. Spotta commercialized Bed Pod, its first product which monitors bed bugs in hotels and other multi-room accommodation offerings. | $3.8M | Series A | Dec 15, 2023 |  |
| Nu Quantum | Nu Quantum is a telecommunications company that develops end-to-end quantum cryptography systems.It secures communications within and between cities through urban and satellite free-space optical links. The system helps with the realization of commercial deliverable photonic technologies by combining novel materials and semiconductor technology.This enables clients to secure the exchange of cryptographic keys for the ultra-sensitive detection of light.Yuri Andersson, Mete Atatüre, and Carmen Berraquero founded Nu Quantum in Cambridge, Cambridgeshire in 2018. | $8.5M | Seed | Nov 02, 2023 |  |
| Strolll | Strolll Neurotechnology | $2.6M | Seed | Oct 17, 2023 |  |
| Pencil Biosciences | Pencil Biosciences aims to develop a novel, programmable genome-modulation tool that overcomes the challenges associated with the technologies currently available. | $7.3M | Seed | Sep 28, 2023 |  |
| RoboK | VC-backed startup developing software solutions and tools for building and validating AI-based perception. The company's vision is to accelerate the deployment of affordable autonomy solutions for automotive and industrial applications. | $2M | Seed | Jun 29, 2023 |  |

10 of 55 investments shown.

## Co-investors
- [Cambridge Angels group](https://shizune.co/investors/profile/cambridge-angels-group) — VC Fund, 28 deals together
- [University of Cambridge Enterprise](https://shizune.co/investors/profile/university-of-cambridge-enterprise) — VC Fund, 19 deals together
- [Parkwalk Advisors](https://shizune.co/investors/profile/parkwalk-advisors) — VC Fund, 14 deals together
- [IQ Capital](https://shizune.co/investors/profile/iq-capital-partners) — VC Fund, 12 deals together
- [Amadeus Capital Partners](https://shizune.co/investors/profile/amadeus-capital-partners) — VC Fund, 9 deals together
- [Cambridge Capital Group](https://shizune.co/investors/profile/cambridge-capital-group) — VC Fund, 6 deals together

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## FAQ

### What does Martlet Capital invest in?

Martlet Capital invests primarily in Health Care, Biotechnology and Software startups, most often at Seed and Series A stage. Most of the 55 investments tracked by Shizune back companies in United Kingdom. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Martlet Capital's check size?

Martlet Capital typically joins rounds of $525k–$7.5M at Seed, $191k–$1.2M at Pre-Seed and $1M–$9.5M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Martlet Capital participates in.

### How do I contact Martlet Capital?

Public channels for Martlet Capital include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Who are the partners at Martlet Capital?

The team at Martlet Capital includes Alan Cowley (Investment Analyst) and Robert Marshall (Founder, Chief Executive Officer & Executive Chairman). The Team section lists each member with their title, investment count and links.

### 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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