Sio Capital Management’s ProQR Therapeutics PRQR Stock Holding History

Sio Capital Management’s Portfolio PRQR Stock Details PRQR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	–	Sell	-1,954,715	Closed	-$3.17M	–	85
2026 Q1	$3.17M	Sell	1,954,715 -209,466	-10%	-$343K	0.45%	49
2025 Q4	$4.37M	Buy	2,164,181 +89,042	+4%	+$208K	0.69%	35
2025 Q3	$4.42M	Hold	2,075,139	–	–	1.12%	26
2025 Q2	$4.23M	Buy	2,075,139 +20,546	+1%	+$33.4K	1.62%	19
2025 Q1	$2.73M	Hold	2,054,593	–	–	0.81%	29
2024 Q4	$5.44M	Buy	+2,054,593	New	+$6.52M	1.53%	22
2021 Q3	–	Sell	-380,045	Closed	-$2.56M	–	77
2021 Q2	$2.56M	Sell	380,045 -12,776	-3%	-$82.4K	0.64%	47
2021 Q1	$2.6M	Buy	+392,821	New	+$2.01M	0.53%	58

Other funds holding PRQR

Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return

Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return

AAA

Affinity Asset Advisors New York $2.21B AUM 431.26% 1-Year Est. Return

PFM

Privium Fund Management Amsterdam, Netherlands $544M AUM 72.49% 1-Year Est. Return

Ikarian Capital Dallas, Texas $928M AUM 596.14% 1-Year Est. Return

Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return

HCM

Heights Capital Management San Francisco, California $433M AUM 8.59% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

SFM

Sphera Funds Management Tel Aviv, Israel $767M AUM 119.71% 1-Year Est. Return

KCM

Kynam Capital Management Princeton, New Jersey $1.81B AUM 192.15% 1-Year Est. Return

Sio Capital Management's PRQR Position: Q2 2026 in Review

Sio Capital Management sold out of ProQR Therapeutics (PRQR) in Q2 2026, closing a stake of 1,954,715 shares — an estimated $3.17M sold.

Sio Capital Management first reported a position in PRQR in Q1 2021 and held it in 8 quarters. The position peaked at $5.44M in Q4 2024. 70 funds tracked by Wall St. Rank hold PRQR as of Q2 2026.

Sio Capital Management reported no remaining ProQR Therapeutics position as of Q2 2026 after selling out during the quarter.
Sio Capital Management sold 1,954,715 ProQR Therapeutics shares in Q2 2026, an estimated $3.17M.
Sio Capital Management first reported a position in ProQR Therapeutics in Q1 2021 and held it in 8 quarters.
Sio Capital Management's ProQR Therapeutics position peaked at $5.44M in Q4 2024.
70 funds tracked by Wall St. Rank held ProQR Therapeutics as of Q2 2026.

Based on Sio Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.