Company · Ownership research

ProQR Therapeutics N.V. PRQR

CIK 0001612940 · CUSIP N71542109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP N71542109 (PRQR), not CUSIP N71542909 (PRQR), CUSIP N71542959 (PRQR), and does not merge CUSIPs.

This page lists the top 20 of 67 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$10.78M 8,102,098 shares	0.02%	-1.50M(-15.60%)Reduced	SEC filing ↗ May 15, 2025	▾
02	Privium Fund Management B.V. CIK 1795097 · View history	$6.63M 4,985,633 shares	1.73%	0(0.00%)Unchanged	SEC filing ↗ May 9, 2025	▾
03	Affinity Asset Advisors, LLC CIK 1773195 · View history	$4.37M 3,284,512 shares	0.68%	+459.51K(+16.30%)Added	SEC filing ↗ May 14, 2025	▾
04	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$2.75M 2,070,648 shares	0.00%	-756.63K(-26.80%)Reduced	SEC filing ↗ May 15, 2025	▾
05	Sio Capital Management, LLC CIK 1482416 · View history	$2.73M 2,054,593 shares	0.83%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2025	▾
06	Aberdeen Group plc CIK 1716774 · View history	$2.46M 1,850,348 shares	0.00%	+1.85MNew	SEC filing ↗ May 13, 2025	▾
07	UBS Group AG CIK 1610520 · View history	$2.38M 1,787,049 shares	0.00%	-523.00K(-22.60%)Reduced	SEC filing ↗ May 13, 2025	▾
08	Kynam Capital Management, LP CIK 1907884 · View history	$2.33M 1,750,000 shares	0.20%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2025	▾
09	DAFNA Capital Management LLC CIK 1389933 · View history	$2.08M 1,567,561 shares	0.59%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2025	▾
10	Siren, L.L.C. CIK 2005245 · Amended · View history	$2.06M 1,552,183 shares	0.12%	-22.82K(-1.40%)Reduced	SEC filing ↗ May 23, 2025	▾
11	PLATINUM INVESTMENT MANAGEMENT LTD CIK 1256071 · View history	$2.05M 1,538,247 shares	0.12%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2025	▾
12	MORGAN STANLEY CIK 895421 · View history	$1.84M 1,383,493 shares	0.00%	+897.51K(+184.70%)Added	SEC filing ↗ May 15, 2025	▾
13	Woodline Partners LP CIK 1784547 · View history	$1.76M 1,325,655 shares	0.01%	-2.23M(-62.70%)Reduced	SEC filing ↗ May 15, 2025	▾
14	ArrowMark Colorado Holdings LLC CIK 1483859 · View history	$1.66M 1,245,038 shares	0.03%	+63.63K(+5.40%)Added	SEC filing ↗ May 15, 2025	▾
15	M28 Capital Management LP CIK 1807489 · View history	$1.36M 1,019,498 shares	1.86%	0(0.00%)Unchanged	SEC filing ↗ May 14, 2025	▾
16	CITADEL ADVISORS LLC CIK 1423053 · View history	$1.09M 818,858 shares	0.00%	+410.05K(+100.30%)Added	SEC filing ↗ May 15, 2025	▾
17	Point72 Asset Management, L.P. CIK 1603466 · Amended · View history	$997.50K 750,000 shares	0.00%	-741.27K(-49.70%)Reduced	SEC filing ↗ Jul 21, 2025	▾
18	MACQUARIE GROUP LTD CIK 1418333 · Amended · View history	$825.00K 620,000 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2025	▾
19	Walleye Capital LLC CIK 1758720 · View history	$669.74K 503,564 shares	0.01%	+52.26K(+11.60%)Added	SEC filing ↗ May 14, 2025	▾
20	Monaco Asset Management SAM CIK 1803593 · View history	$627.64K 471,908 shares	0.32%	+175.29K(+59.10%)Added	SEC filing ↗ May 8, 2025	▾

Showing 20 / 67 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

41,293,076

Not deduplicated across managers

Disclosed value

$54.92M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

ProQR Therapeutics N.V. · Q1 2025

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.