Prosensa Holding NV
13F holders, Q1 2026 (March 31)1holders
0new positions
0sold out
$13.37avg. 13F price*
At the end of Q1 2026, 1 institutions reported holding Prosensa Holding NV in their 13F filings, unchanged from Q4 2025. 0 opened new positions and 0 sold out. The largest holder was Byrne Asset Management LLC ($2K).
- Company
- Prosensa Holding NV
- Filed as
- ATRIUM THERAPEUTICS INC (Q1 2026)
- CUSIP
- N71546100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 0 | $0 |
| Exits | 0 | $0 |
All 13F filers, Q4 2025 → Q1 2026: 1,598 shares sold, net −1,598 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 1 holders
| Byrne Asset Management LLC | 0.00% | Reduce -90.0% | 177 | $2K |
"% of holder's portfolio" is PROSENSA HOLDING NV's weight in each manager's 13F, not the share of Prosensa Holding NV the manager owns.