Funds, angels and corporates active in European rounds
| Investor | Type | Deals | Companies | Top sector | Active |
|---|---|---|---|---|---|
| Orhan Çetin | Angel | 2 | 1 | Transportation | 2022–2024 |
| Origin Energy | Corporate | 2 | 1 | Energy | 2021–2023 |
| Oriol Vinyals | Angel | 2 | 2 | AI | 2022–2024 |
| Ornament Health | Corporate | 2 | 2 | Deeptech | 2021–2022 |
| Ortho Innovations | Venture capital | 2 | 2 | Healthtech | 2022–2023 |
| Ory Weihs | Angel | 2 | 2 | Software | 2025–2026 |
| Oscar Salazar | Angel | 2 | 2 | Software | 2022–2023 |
| OSEO Innovation | Investment firm | 2 | 2 | Marketing | 2007–2013 |
| Oskar Hartmann | Angel | 2 | 2 | Fashion | 2011–2016 |
| Oskari Saarenmaa | Angel | 2 | 2 | Deeptech | 2022–2024 |
| Osman Alp Arlı | Angel | 2 | 2 | E-commerce | 2021–2024 |
| OSTİM GSYF | Venture capital | 2 | 2 | Robotics | 2023 |
| other shareholders | Angel | 2 | 2 | Agritech | 2024–2026 |
| Othman Laraki | — | 2 | 2 | Software | 2016–2026 |
| Otium Brands | — | 2 | 2 | Agritech | 2018 |
| Ouest Croissance | — | 2 | 2 | Software | 2016–2022 |
| Ouest Valorisation SATT | — | 2 | 2 | Cleantech | 2016–2018 |
| OurCrowd.com | — | 2 | 2 | Software | 2018 |
| OurCrowd-GCai | — | 2 | 2 | Software | 2017 |
| Oxford Finance LLC | — | 2 | 2 | Fintech | 2021–2026 |
| Oxford Innovation Fund | Venture capital | 2 | 2 | Deeptech | 2022–2025 |
| Oxford Sciences Enterprises | Venture capital | 2 | 2 | Deeptech | 2023–2025 |
| Oxtech Ventures | Venture capital | 2 | 2 | Cleantech | 2025 |
| Oxygen Accelerator | Accelerator | 2 | 2 | Media | 2013–2014 |
| Oy Ingman Finance | — | 2 | 1 | Software | 2013–2014 |
