PRQR — ProQR Therapeutics N.V.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Others in Healthcare
Measured signals that fired on PRQR
| date | signal | measured base rate |
|---|---|---|
| 2026-08-03 | Conviction buy by an officer insider | -1.03% over 21 days · t = -2.24 · n = 1,083 statistically distinguishable from its control group |
| 2026-07-13 | Conviction buy by an officer insider | -1.03% over 21 days · t = -2.24 · n = 1,083 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-07-31 | de Boer Daniel Anton Chief Executive Officer | Open-market purchase | 200.0K | 1.77 | 354.0K |
| 2026-07-17 | Filius Bart Director | Open-market purchase | 150.0K | 1.72 | 257.9K |
| 2026-07-09 | de Boer Daniel Anton Chief Executive Officer | Open-market purchase | 150.0K | 1.74 | 261.0K |
| 2026-07-07 | de Boer Daniel Anton Chief Executive Officer | Open-market purchase | 150.0K | 1.59 | 238.5K |
| 2026-06-26 | Filius Bart Director | Open-market purchase | 150.0K | 1.54 | 231.0K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 10.1M | 6.3M |
| Privium Fund Management B.V. | 8.9M | 5.5M |
| Aberdeen Group plc | 5.4M | 3.3M |
| Affinity Asset Advisors, LLC | 4.0M | 2.5M |
| Sio Capital Management, LLC | 3.2M | 2.0M |
| DAFNA Capital Management LLC | 2.5M | 1.6M |
| Kynam Capital Management, LP | 2.5M | 1.6M |
| Ikarian Capital, LLC | 2.4M | 1.5M |
| MORGAN STANLEY | 2.1M | 1.3M |
| PLATINUM INVESTMENT MANAGEMENT LTD | 2.0M | 1.2M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 6-K | 2026-08-13 | 2026-06-30 | on EDGAR ↗ |
| 6-K | 2026-08-13 | 2026-08-13 | on EDGAR ↗ |
| 4 | 2026-08-03 | 2026-07-31 | on EDGAR ↗ |
| SCHEDULE 13D/A | 2026-07-29 | — | on EDGAR ↗ |
| SCHEDULE 13G | 2026-07-29 | — | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-07-24 | — | on EDGAR ↗ |
| 4 | 2026-07-21 | 2026-07-17 | on EDGAR ↗ |
| EFFECT | 2026-07-15 | — | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
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