SEC Form 4 · Updated Daily
PRQR
— ProQR Therapeutics NV OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Platenburg Gerardus Johannes | Director · Officer | 824,388 | 2026-03-18 | — |
| de Boer Daniel Anton | Director · Officer | 500,000 | 2026-07-31 | P |
| Valerio Domenico | Director | 420,729 | 2026-03-18 | — |
| Filius Bart | Director | 300,000 | 2026-07-17 | P |
| Shannon James Samuel | Director | 61,538 | 2026-03-18 | — |
| HEGGIE THERESA | Director | 43,623 | 2026-03-18 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-07-31 | de Boer Daniel Anton | Open-market buy | 200,000 | $1.77 | 500,000 |
| 2026-07-17 | Filius Bart | Open-market buy | 150,000 | $1.72 | 300,000 |
| 2026-07-09 | de Boer Daniel Anton | Open-market buy | 150,000 | $1.74 | 300,000 |
| 2026-07-07 | de Boer Daniel Anton | Open-market buy | 150,000 | $1.59 | 150,000 |
| 2026-06-26 | Filius Bart | Open-market buy | 150,000 | $1.54 | 150,000 |
| 2026-06-02 | Hinsch Gylvin Lykke | Grant / award (derivative) | 14,495 | $0.00 | 14,495 |
| 2026-06-02 | Hinsch Gylvin Lykke | Grant / award (derivative) | 14,595 | $0.00 | 14,595 |
| 2026-03-18 | Shannon James Samuel | — | — | — | 61,538 |
| 2026-03-18 | HEGGIE THERESA | — | — | — | 43,623 |
| 2026-03-18 | Valerio Domenico | — | — | — | 420,729 |
| 2026-03-18 | Valerio Domenico | — | — | — | 304,963 |
| 2026-03-18 | Platenburg Gerardus Johannes | — | — | — | 824,388 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.