Funds, angels and corporates active in European rounds
| Investor | Type | Deals | Companies | Top sector | Active |
|---|---|---|---|---|---|
| OP Financial Group | — | 1 | 1 | Fintech | 2017 |
| OP Insurance | — | 1 | 1 | Software | 2018 |
| Opalic | — | 1 | 1 | Energy | 2018 |
| OpAmp Capital | Venture capital | 1 | 1 | AI | 2023 |
| Open Data Security | — | 1 | 1 | Cybersecurity | 2019 |
| Open Field Capital | Investment firm | 1 | 1 | Software | 2015 |
| Open Learning Spain | Corporate | 1 | 1 | Travel | 2023 |
| Open Society Foundations | Venture capital | 1 | 1 | Cleantech | 2024 |
| Open Value Foundation | Venture capital | 1 | 1 | Software | 2022 |
| OpenAI | Venture capital | 1 | 1 | Software | 2024 |
| OpenAI operators | Angel | 1 | 1 | AI | 2025 |
| OpenAI Startup Fund | Venture capital | 1 | 1 | Robotics | 2023 |
| OpenFX | Venture capital | 1 | 1 | Fintech | 2026 |
| Openspace Ventures | Venture capital | 1 | 1 | Fintech | 2026 |
| Opentech | Venture capital | 1 | 1 | Fintech | 2023 |
| operative shareholders | Venture capital | 1 | 1 | E-commerce | 2025 |
| Opificio137 | Venture capital | 1 | 1 | Software | 2024 |
| Oppenheimer Syndicate | Venture capital | 1 | 1 | Robotics | 2025 |
| Oppiva Invest | Venture capital | 1 | 1 | Edtech | 2022 |
| Opportunity Partners | — | 1 | 1 | Transportation | 2021 |
| Ops Capital | Venture capital | 1 | 1 | Healthtech | 2022 |
| Opstart platform | Crowdfunding | 1 | 1 | Cleantech | 2023 |
| OptiJob | — | 1 | 1 | Semiconductors | 2015 |
| Optima | — | 1 | 1 | Marketing | 2017 |
| Optima-Aegidius | Corporate | 1 | 1 | Proptech | 2023 |
