ProQR Therapeutics N.V.
PRQRNasdaqHealthcare · Pharmaceutical Preparations · P7 · SEC filings ↗ · Compare ⊕
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SEC XBRL · annualNo structured XBRL financials available (common for pre-2009 filers, foreign issuers, or companies that never reported as a US public company).
5%+ owners
SEC Schedule 13D / 13G · last 3 yrs- Van Herk Investments B.V.Activist (13D)Feb 6, 2026
- Privium Fund Management B.V.Passive (13G)Jan 20, 2026
- Adage Capital Management, L.P.Passive (13G)Aug 12, 2025
Holders who disclosed a 5%+ stake. 13D signals intent to influence or control; 13G is a passive holding. Latest filing per holder — open it for the exact stake.
Short interest
FINRA · bi-monthly| Settlement | Shares short | Days to cover | Δ vs prior |
|---|---|---|---|
| May 15, 2026 | 865,672 | 1.8 | +2.5% |
| Apr 30, 2026 | 844,972 | 1.0 | -33.0% |
| Apr 15, 2026 | 1.3M | 1.7 | -24.4% |
| Mar 31, 2026 | 1.7M | 3.9 | -0.9% |
| Mar 13, 2026 | 1.7M | 4.9 | -1.3% |
Shares sold short as reported to FINRA. Days-to-cover = short shares ÷ average daily volume — higher means more potential squeeze pressure.
Recent SEC filings
All filings ↗- 6-KMay 12, 2026
- 6-KFORM 6-KMay 12, 2026
- 6-KFORM 6-KMay 4, 2026
- 6-KFORM 6-KApr 30, 2026
- 6-KFORM 6-KApr 8, 2026
- 6-KFORM 6-KApr 8, 2026
- 6-KFORM 6-KMar 25, 2026
- 3OWNERSHIP DOCUMENTMar 18, 2026
- 3OWNERSHIP DOCUMENTMar 18, 2026
- 3OWNERSHIP DOCUMENTMar 18, 2026
- 3OWNERSHIP DOCUMENTMar 18, 2026
- 3OWNERSHIP DOCUMENTMar 18, 2026
- 3OWNERSHIP DOCUMENTMar 18, 2026
- 3OWNERSHIP DOCUMENTMar 18, 2026
- 3OWNERSHIP DOCUMENTMar 18, 2026