Martlet (formerly Martlet Capital) is an early-stage venture capital firm based in Cambridge, UK, providing patient capital to deep tech and life sciences B2B startups. Its operational business was acquired by EMV Capital in 2024 and it now operates as EMV Capital's Cambridge-based early-stage investment practice.
Their most common stage is series-a (48% of deals). Average disclosed round size is $7.5M (across 17 rounds with reported amounts).
Portfolio
26
Fund Size
—
Top Stage
Series A
Last 12 Mo
0
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
31 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 AllFocal Optics | Seed | — | Nov 2024 |
 Infinitopes | Seed | $16M | Apr 2024 |
 OctaiPipe | Series A | — | Jan 2024 |
 Spotta | Growth | — | Dec 2023 |
 NunaBio | Seed | — | Apr 2023 |
 Robok | Growth | $2.1M | Jan 2023 |
| DDeepTech Recycling | Unknown | — | Jan 2023 |
 Robok | Growth | $2.1M | Jan 2023 |
 Porotech | Series A | $20M | Jan 2021 |
 Nu Quantum | Seed | — | Oct 2020 |
 Flusso | Series A | $5.7M | Jun 2020 |
 Flusso | Series A | $5.7M | Jun 2020 |
 Flusso | Series A | $5.7M | Jun 2020 |
 Flusso | Series A | $5.7M | Jan 2020 |
 Rovco | Series A | — | Jan 2020 |
 Audio Analytic | Series B | $12M | Jan 2019 |
 Audio Analytic | Series B | $12M | Jan 2019 |
 UNDO | Series A | $3.3M | Jan 2016 |
| Audio Analytic | Series A | $5.5M | Jan 2014 |
| Audio Analytic | Series A | — | Jan 2014 |
 Pencil Biosciences | Seed | — | — |
| Robok | Series A | $2.1M | — |
 Closed Loop Medicine | Series A | — | — |
| Spotta | Seed | $1M | — |
 Poro Technologies | Seed | — | — |
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Top Co-Investors
Cambridge Angels18 shared
Cambridge Enterprise12 shared
IQ Capital8 shared
Parkwalk Advisors7 shared
Amadeus Capital Partners5 shared
Cambridge Innovation Capital5 shared
Deeptech Labs5 shared
Innovate UK4 shared
Octopus Ventures3 shared
ACF Investors3 shared
Speedinvest2 shared
private angel investors2 shared
BGF2 shared
British Business Bank2 shared
Cambridge Capital2 shared
National Grid Partners2 shared
Vibe Capital1 shared
Cancer Research Horizons1 shared
Nosara Capital1 shared
Manta Ray Ventures1 shared
Last updated: 7 October 2026