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  • PRQR ProQR Therapeutics N.V.

PRQR

ProQR Therapeutics N.V.

Company with tickers: PRQR

CIK
1612940
CUSIP
N71542109
Shares Outstanding
105,362,551
13F Activity (30d)
60 filings 58 filers
Holders: 68
Total Value: $56,619,582
Total Shares: 34,950,377

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 68 13F filers · Δ vs Dec 31, 2025
Top Holder
17.9%
Jun 2023 → Mar 2026 · range 16.3% – 32.2%
+1.1 pts
Top 5
55.6%
Jun 2023 → Mar 2026 · range 49.6% – 80.4%
+4.1 pts
Top 10
76.1%
Jun 2023 → Mar 2026 · range 70.1% – 92.9%
+5.1 pts
HHI
853
Jun 2023 → Mar 2026 · range 722 – 1,740
Broadly held +99

Quarterly Activity

vs Dec 31, 2025
New
9
Increased
15
Decreased
16
Sold Out
7
Unchanged
28
Holder count: +2
Institutional value: -24.7%
Shares held: -6.1%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Large Aberdeen Group plc +366,289 3,316,965
Mega RAYMOND JAMES FINANCIAL INC +203,193 546,079
Small Privium Fund Management B.V. +109,387 5,467,149
Mega CITADEL ADVISORS LLC +85,901 703,323
Mega TWO SIGMA INVESTMENTS, LP +79,473 918,857

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega UBS Group AG −492,400 305,264
Micro M28 Capital Management LP −419,705 599,793
Mega MILLENNIUM MANAGEMENT LLC −240,745 194,246
Small Sio Capital Management, LLC −209,466 1,954,715
Mega JANE STREET GROUP, LLC −126,886 33,289

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Large MARSHALL WACE, LLP 115,945 $187,830
Mid GSA CAPITAL PARTNERS LLP 114,256 $185,094
Mid Graham Capital Management, L.P. 91,553 $148,315
Small Axiom Investment Management LLC 33,000 $53,460
Large Squarepoint Ops LLC 31,518 $51,059

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mid ArrowMark Colorado Holdings LLC 1,164,722 $2,352,738
Large TWO SIGMA ADVISERS, LP 452,400 $913,848
Small FRANKLIN STREET ADVISORS INC /NC 150,000 $303,000
Large FIFTH THIRD BANCORP 30,000 $60,600
Mega PNC FINANCIAL SERVICES GROUP, INC. 20,097 $40,595
Filter: New 9 Increased 15 Reduced 16 Sold out 7 Unchanged 28
Showing 69 of 69
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $10,130,616 17.89% 6,253,467
Small Privium Fund Management B.V. $8,856,781 15.64% 5,467,149
Large Aberdeen Group plc $5,373,483 9.49% 3,316,965
Mid Affinity Asset Advisors, LLC $3,975,930 7.02% 2,454,278
Small Sio Capital Management, LLC $3,166,638 5.59% 1,954,715
Small DAFNA Capital Management LLC $2,539,448 4.49% 1,567,561
Mid Kynam Capital Management, LP $2,537,433 4.48% 1,566,317
Mid Ikarian Capital, LLC $2,417,410 4.27% 1,492,229
Mega MORGAN STANLEY $2,105,635 3.72% 1,299,775
Small PLATINUM INVESTMENT MANAGEMENT LTD $2,001,532 3.54% 1,235,514
Mega TWO SIGMA INVESTMENTS, LP $1,488,548 2.63% 918,857
Large Point72 Asset Management, L.P. $1,224,464 2.16% 755,842
Mega CITADEL ADVISORS LLC $1,139,383 2.01% 703,323
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $1,004,400 1.77% 620,000
Large Walleye Capital LLC $984,196 1.74% 607,529
Micro M28 Capital Management LP $971,664 1.72% 599,793
Mega RAYMOND JAMES FINANCIAL INC $884,647 1.56% 546,079
Small Monaco Asset Management SAM $678,460 1.20% 418,803
Mid BOOTHBAY FUND MANAGEMENT, LLC $575,558 1.02% 355,283
Mega UBS Group AG $494,527 0.87% 305,264
Mega NORTHERN TRUST CORP Bank $471,928 0.83% 291,314
Mega MILLENNIUM MANAGEMENT LLC $314,678 0.56% 194,246
Small Palo Alto Investors LP $305,867 0.54% 188,807
Mega BANK OF AMERICA CORP /DE/ Bank $299,878 0.53% 185,110
Small DIADEMA PARTNERS LP $291,734 0.52% 180,083
Mega BNP PARIBAS ARBITRAGE, SA $279,205 0.49% 172,349
Large MARSHALL WACE, LLP $187,830 0.33% 115,945
Mid GSA CAPITAL PARTNERS LLP $185,094 0.33% 114,256
Mega DEUTSCHE BANK AG\ Bank $176,194 0.31% 108,762
Mid Graham Capital Management, L.P. $148,315 0.26% 91,553
Mid OneDigital Investment Advisors LLC $137,700 0.24% 85,000
Mega GEODE CAPITAL MANAGEMENT, LLC $137,552 0.24% 84,909
Mid XTX Topco Ltd $125,204 0.22% 77,287
Small Lynx1 Capital Management LP $110,947 0.20% 68,486
Small Persistent Asset Partners Ltd $74,628 0.13% 46,067
Small Velan Capital Investment Management LP $72,900 0.13% 45,000
Mega Invesco Ltd. $72,239 0.13% 44,592
Mega JANE STREET GROUP, LLC $53,927 0.10% 33,289
Small Axiom Investment Management LLC $53,460 0.09% 33,000
Large Squarepoint Ops LLC $51,059 0.09% 31,518
Mid NINE MASTS CAPITAL Ltd $47,819 0.08% 29,518
Large GUGGENHEIM CAPITAL LLC $44,783 0.08% 27,644
Mid MOODY LYNN LIEBERSON & WALKER, LLC $40,500 0.07% 25,000
Mid SIMPLEX TRADING, LLC $40,286 0.07% 24,868
Small Keating Financial Advisory Services, Inc. $33,294 0.06% 20,552
Large Mariner, LLC $32,673 0.06% 20,169
Mid China Universal Asset Management Co., Ltd. $32,400 0.06% 20,000
Mid Vanguard Personalized Indexing Management, LLC $31,444 0.06% 19,410
Small RFG Advisory, LLC $30,780 0.05% 19,000
Mid GROUP ONE TRADING LLC $30,656 0.05% 18,924
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $22,194 0.04% 13,700
Mid Atom Investors LP $21,233 0.04% 13,107
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $19,773 0.03% 12,206
Mid Quadrature Capital Ltd $19,496 0.03% 12,035
Micro NANO CAP NEW MILLENNIUM GROWTH FUND L P $16,200 0.03% 10,000
Mid ADAR1 Capital Management, LLC $16,200 0.03% 10,000
Large TRUIST FINANCIAL CORP $16,200 0.03% 10,000
Mega WELLS FARGO & COMPANY/MN $6,480 0.01% 4,000
Mega BlackRock, Inc. $6,390 0.01% 3,945
Small Hilton Head Capital Partners, LLC $2,274 0.00% 1,404
Large Steward Partners Investment Advisory, LLC $2,106 0.00% 1,300
Mid Farther Finance Advisors, LLC $1,620 0.00% 1,000
Micro PFS Partners, LLC $1,620 0.00% 1,000
Mid SBI Securities Co., Ltd. Broker-Dealer $834 0.00% 515
Mega ROYAL BANK OF CANADA Bank $498 0.00% 308
Mega JPMORGAN CHASE & CO $458 0.00% 283
Small Caitong International Asset Management Co., Ltd $199 0.00% 123
Large TD Waterhouse Canada Inc. $64 0.00% 40
Small Medallion Wealth Advisors, LLC $16 0.00% 10

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