Funds, angels and corporates active in European rounds
| Investor | Type | Deals | Companies | Top sector | Active |
|---|---|---|---|---|---|
| Simon Squibb | Angel | 2 | 2 | Fintech | 2021–2025 |
| Simone Canclini | Angel | 2 | 2 | Marketing | 2021–2022 |
| Simula Innovation | — | 2 | 2 | Consumer | 2017–2024 |
| SineWave Ventures | — | 2 | 2 | Fintech | 2016–2025 |
| SINTEF Venture IV | — | 2 | 2 | Deeptech | 2018–2022 |
| Sioux Technologies | Venture capital | 2 | 1 | Healthtech | 2022–2026 |
| Sir John Egan | Angel | 2 | 2 | Energy | 2022–2023 |
| Sir Richard Branson | — | 2 | 2 | Fintech | 2017–2022 |
| Sir Ronald Cohen | — | 2 | 2 | Healthtech | 2017–2021 |
| Siret Ünsal | Angel | 2 | 2 | AI | 2023 |
| Siris Capital Group | — | 2 | 1 | Travel | 2020–2023 |
| Siskon | Corporate | 2 | 2 | Software | 2025 |
| Sisu Ventures | Venture capital | 2 | 2 | Gaming | 2023–2026 |
| SiteGround | Corporate | 2 | 2 | Transportation | 2024 |
| Situlus | Venture capital | 2 | 2 | Software | 2023 |
| Sixth Street | Venture capital | 2 | 2 | Software | 2022–2026 |
| SJF Ventures | Venture capital | 2 | 2 | Software | 2019–2023 |
| Sjuul Berden | Angel | 2 | 2 | Energy | 2023–2024 |
| Skandia Fonder | — | 2 | 2 | Energy | 2017–2021 |
| Skel Investment Company | Investment firm | 2 | 2 | Foodtech | 2024 |
| Sky Dayton | Angel | 2 | 1 | Deeptech | 2022–2025 |
| Skycatcher | — | 2 | 1 | Gaming | 2021–2022 |
| SkyDeck Europe | Accelerator | 2 | 2 | Cybersecurity | 2026 |
| Skynet Trading | Corporate | 2 | 2 | Fintech | 2022–2024 |
| Skyviews Life Science Ltd. | — | 2 | 2 | Healthtech | 2022 |
