Funds, angels and corporates active in European rounds
| Investor | Type | Deals | Companies | Top sector | Active |
|---|---|---|---|---|---|
| Intermediate Capital Group | Investment firm | 2 | 2 | Energy | 2022–2023 |
| International Airlines Group | — | 2 | 2 | Energy | 2018–2025 |
| International Airlines Group (IAG) | Venture capital | 2 | 2 | Cleantech | 2022–2025 |
| Internet Attitude | Investment firm | 2 | 2 | Marketing | 2014–2016 |
| Interogo Holding | Corporate | 2 | 2 | Energy | 2022–2025 |
| InterWest Partners | — | 2 | 1 | Software | 2014–2016 |
| Intrepid Partners | Venture capital | 2 | 2 | Healthtech | 2025 |
| Intrepid Growth Partners | Venture capital | 2 | 2 | AI | 2025–2026 |
| Intuition VC | Venture capital | 2 | 2 | Cybersecurity | 2025–2026 |
| Invenio Partners | Venture capital | 2 | 2 | Agritech | 2023–2024 |
| Inversiones Financieras Perseo | Venture capital | 2 | 1 | Energy | 2023–2025 |
| Invertidos | Venture capital | 2 | 2 | Software | 2021–2024 |
| Invest NI | — | 2 | 2 | Software | 2020–2023 |
| Invest Pme | — | 2 | 2 | Marketing | 2017–2018 |
| Investbridge | — | 2 | 2 | Agritech | 2021 |
| Invested | Venture capital | 2 | 2 | HRtech | 2022 |
| Investing Profit Wisely | — | 2 | 2 | Software | 2016–2023 |
| Investment and Development Agency for the Northern Netherlands (NOM) | Investment firm | 2 | 2 | HRtech | 2023 |
| Invus Opportunities | — | 2 | 2 | Fashion | 2021–2024 |
| InZet | Venture capital | 2 | 2 | Healthtech | 2023–2024 |
| ION Group | — | 2 | 2 | Fintech | 2021–2023 |
| Iona Star Capital | Venture capital | 2 | 2 | Software | 2024–2025 |
| Ionut Ciobotaru | Angel | 2 | 2 | AI | 2023–2024 |
| Ippen | — | 2 | 1 | Healthtech | 2021–2022 |
| IRD Invest | Investment firm | 2 | 2 | Edtech | 2022–2024 |
