Martlet is an early-stage venture capital firm, primarily focusing on pre-seed and seed-stage IP-rich, B2B deep technology and life science startups, predominantly in Cambridge, UK. Their strategy involves providing patient capital, typically upwards of £250k initially, alongside hands-on support and a network of contacts, often co-investing with other angels and seed funds.
67% of their portfolio is in Hardware & Semiconductors. Their most common stage is seed (100% of deals). Average disclosed round size is $7.8M (across 3 rounds with reported amounts).
Portfolio
3
Fund Size
$29M
Top Stage
Seed
Last 12 Mo
0
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
3 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 AllFocal Optics | Seed | $5.3M | Nov 2024 |
 Infinitopes | Seed | $16M | Apr 2024 |
 Nu Quantum | Seed | $2.1M | Oct 2020 |
Top Co-Investors
Speedinvest1 shared
another.vc1 shared
Innovate UK1 shared
Octopus Ventures1 shared
Kindred Ventures1 shared
Cancer Research Horizons1 shared
Manta Ray Ventures1 shared
Last updated: 9 April 2026