Funds, angels and corporates active in European rounds
| Investor | Type | Deals | Companies | Top sector | Active |
|---|---|---|---|---|---|
| Siebel Invest One | Venture capital | 1 | 1 | Fashion | 2022 |
| Siem Offshore Contractors | — | 1 | 1 | Energy | 2017 |
| Siemens Financial Services (SFS) | Venture capital | 1 | 1 | Cleantech | 2023 |
| Sienna Capital | Venture capital | 1 | 1 | Travel | 2022 |
| Siep van der Valk | Angel | 1 | 1 | Energy | 2022 |
| Sierra Peterson | Angel | 1 | 1 | Energy | 2024 |
| Siew-Veena Sahi | Venture capital | 1 | 1 | Healthtech | 2022 |
| SIF Ventures | Venture capital | 1 | 1 | AI | 2025 |
| SIF Transilvania | Venture capital | 1 | 1 | Software | 2022 |
| SIG | Venture capital | 1 | 1 | Fintech | 2023 |
| SIG InnoVentures | Venture capital | 1 | 1 | Hardware | 2024 |
| Sigi Föhn | Angel | 1 | 1 | Healthtech | 2022 |
| Sigil/Zeeprime | Venture capital | 1 | 1 | Fintech | 2025 |
| Sigma Capital | Venture capital | 1 | 1 | AI | 2026 |
| Sigma Software Lab | Corporate | 1 | 1 | Fintech | 2023 |
| SIGNA | Venture capital | 1 | 1 | Software | 2021 |
| Signal Ocean | Venture capital | 1 | 1 | Software | 2022 |
| Signature Hospitality Group | Venture capital | 1 | 1 | Gaming | 2025 |
| Signavio | Venture capital | 1 | 1 | Software | 2023 |
| Signet Jewelers | Corporate | 1 | 1 | E-commerce | 2021 |
| Sigul Invest | Venture capital | 1 | 1 | E-commerce | 2026 |
| Siguler Guff & Company | Venture capital | 1 | 1 | AI | 2025 |
| Sigurgeir Guðlaugsson | Angel | 1 | 1 | Healthtech | 2022 |
| Siim Teller | Angel | 1 | 1 | Software | 2022 |
| Sijoittaja Pro‘s investor group | Venture capital | 1 | 1 | E-commerce | 2022 |
