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ISSUER PROFILE · CIK 0001612940 · CUSIP N71542109

ProQR Therapeutics N.V.PRQR

5 13D/G filings 2 distinct filers 1 insider transactions (365d)

Post-Filing Returns · across 3 activist filings on this issuer

Median 30d
0.0%
avg +1.4%
Median 60d
0.0%
avg 0.0%
Median 90d
0.0%
avg 0.0%
Median 180d
0.0%
avg 0.0%

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
5
3 SCHEDULE 13D/A · 1 SCHEDULE 13G · 1 SCHEDULE
Distinct filers
2
multi-activist cluster
Insiders (365d)
1
1 buys · 0 sales
Latest short DTC
1.75
as of 2026-07-15

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $1.64M
Point72 Asset Mgmt

13D/G Filings Timeline · 5 total

FiledFormFilerStakeSharesIntent
2026-07-29 SCHEDULE 13D/A VAN HERK INVESTMENTS B.V. 15,384,250 view →
2026-07-29 SCHEDULE 13G Aberdeen Group plc view →
2026-06-30 SCHEDULE 13D/A VAN HERK INVESTMENTS B.V. 15,384,250 view →
2026-06-03 SCHEDULE 13D/A VAN HERK INVESTMENTS B.V. 14.60% 15,384,250 view →
2025-09-30 SCHEDULE VAN HERK INVESTMENTS B.V. 13.60% 14,329,690 view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-07-09 de Boer Daniel Anton director, officer Buy 150,000 $1.74 $261K

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-07-15 2,308,954 1.75 +92.5%
2026-06-30 1,199,214 1.00 +18.8%
2026-06-15 1,009,500 1.78 +13.7%
2026-05-29 887,574 1.60 +2.5%
2026-05-15 865,672 1.75 +2.5%
2026-04-30 844,972 1.00 -33.0%
2026-04-15 1,261,281 1.71 -24.4%
2026-03-31 1,667,465 3.93 -0.9%
2026-03-13 1,683,024 4.87 -1.3%
2026-02-27 1,704,877 6.93 -4.3%
2026-02-13 1,782,469 4.45 -0.2%
2026-01-30 1,785,809 4.06 +47.2%

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