AIBiotech & Life SciencesClimate & EnergyHardware & SemiconductorsRobotics & AutomationDefense & Space
SiteGround Capital is the family office of SiteGround, Bulgaria's first unicorn and a pioneering web hosting company. It provides patient capital backing breakthrough science and engineering across deep tech, sustainability, and intelligence, solving critical challenges in human health, the physical world, and sustainability.
Deal activity increased 300% year-over-year (4 deals in the last 12 months). Average disclosed round size is $129.9M (across 15 rounds with reported amounts).
Portfolio
13
Fund Size
—
Top Stage
Series C
Last 12 Mo
4
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
18 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Universal Quantum | Series A | — | Oct 2026 |
 Kyoto Fusioneering ltd. | Series D | — | Aug 2026 |
| AAxelera | Series C | $250M | Mar 2026 |
 Axelera AI | Series C | — | Feb 2026 |
 Terrestrial Bio | Unknown | $50M | Jan 2026 |
| SSage Geosystems | Series B | $97M | Jan 2026 |
 Ph7 | Series B | $25.6M | Dec 2025 |
 Realta Fusion | Series A | $36M | May 2025 |
| Terrestrial Bio | Series C | $12M | May 2024 |
 Project 3 Mobility | Series A | $108M | Feb 2024 |
 VEIR | Series B | $75M | — |
| Axelera AI | Growth | $250M | — |
| AAxelera | Growth | $250M | — |
| TTerrestrial | Series C | $50M | — |
| AAxelera AI B.V. | Growth | $250M | — |
| AAxelera AI B.V. | Series C | $250M | — |
| SSage Geosystems | Series A | $44.8M | — |
 Type One Energy | Debt | $200M | — |
Top Co-Investors
Innovation Industries6 shared
Verve Ventures5 shared
SFPIM4 shared
Bitfury4 shared
Samsung Catalyst Fund4 shared
CDP Venture Capital4 shared
Invest-NL4 shared
SiteGround4 shared
Engine Ventures4 shared
Fine Structure Ventures2 shared
RA Capital Management2 shared
Breakthrough Energy Ventures2 shared
European Commission2 shared
Nabors Industries2 shared
Carbon Direct Capital2 shared
Cubit Capital2 shared
Ormat Technologies2 shared
TitletownTech1 shared
Last updated: 20 October 2026