Quantum Cyber N.V.
Ownership
Ownership Structure
Who owns Quantum Cyber N.V. (QUCY)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 28.6% of the shares are freely tradable; institutional investors hold 1.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Jane Street Group LLC | 0.10 | 84,574 | +425.5 | 06/30/2026 |
| Virtu Financial LLC | 0.05 | 41,068 | +42.4 | 06/30/2026 |
| Steward Partners Investment Advisory, LLC | 0.04 | 30,000 | +0.0 | 03/31/2026 |
| UBS Group AG | 0.03 | 26,110 | -69.8 | 06/30/2026 |
| XTX Topco Ltd | 0.01 | 11,391 | -82.3 | 06/30/2026 |
| Professional Advisory Services Inc | 0.01 | 10,000 | +0.0 | 06/30/2026 |
| Journey Advisory Group, LLC | 0.01 | 10,000 | -33.3 | 06/30/2026 |
| Keystone Financial Group Inc | 0.01 | 5,300 | +0.0 | 06/30/2026 |
| Tower Research Capital LLC | 0.00 | 4,000 | +0.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Fidelity Nasdaq Composite Index | 0.01 | 9,293 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: October 5, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.