Funds, angels and corporates active in European rounds
| Investor | Type | Deals | Companies | Top sector | Active |
|---|---|---|---|---|---|
| Oisin Hanrahan | — | 1 | 1 | Marketing | 2018 |
| OIW 100 Pitches | Accelerator | 1 | 1 | Cleantech | 2021 |
| OK.se | Venture capital | 1 | 1 | Energy | 2022 |
| Okan Coşgun | Angel | 1 | 1 | Edtech | 2025 |
| Oke Göttlich | Angel | 1 | 1 | Media | 2022 |
| OKEx | Venture capital | 1 | 1 | Fintech | 2021 |
| OKEx Blockdream Ventures | Venture capital | 1 | 1 | Gaming | 2022 |
| Oklo Inc | Venture capital | 1 | 1 | Energy | 2025 |
| OKWAVE | — | 1 | 1 | Fintech | 2017 |
| Ola Håkansson | Angel | 1 | 1 | Media | 2021 |
| Olaf Berlien | Angel | 1 | 1 | Software | 2021 |
| Olaf Kempin | Angel | 1 | 1 | Fintech | 2021 |
| Olaf Koch | Angel | 1 | 1 | Media | 2023 |
| Olaf Schlüter | — | 1 | 1 | Energy | 2025 |
| Olaf Zöftig | Angel | 1 | 1 | Fintech | 2025 |
| Olam | Venture capital | 1 | 1 | Software | 2024 |
| Olav Slupphaug | Angel | 1 | 1 | Software | 2024 |
| Old College Capital (OCC) - the University of Edinburgh’s in-house venture investment fund | Investment firm | 1 | 1 | Healthtech | 2024 |
| Olda Bajer | Angel | 1 | 1 | Travel | 2022 |
| Oldenburg Vineyards | Corporate | 1 | 1 | Agritech | 2024 |
| Oldham Council | Government / public | 1 | 1 | Healthtech | 2026 |
| Ole GS Holding | Venture capital | 1 | 1 | Healthtech | 2023 |
| Oleg Evseenkov | — | 1 | 1 | Transportation | 2017 |
| Oleg Krymasov | — | 1 | 1 | Media | 2018 |
| Oleg Popov | Angel | 1 | 1 | Legaltech | 2021 |
