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UBS O'Connor’s ProQR Therapeutics PRQR Stock Holding History

UBS O'Connor’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
2025
Q1 		– Sell
-227,020
Closed -$602K – 432
2024
Q4 		$602K Buy
+227,020
New +$721K 0.02% 266
2023
Q4 		– Sell
-189,328
Closed -$246K – 581
2023
Q3 		$246K Hold
189,328
– – ﹤0.01% 442
2023
Q2 		$307K Buy
189,328
+9,328
+5% +$18.2K 0.01% 467
2023
Q1 		$383K Buy
+180,000
New +$550K 0.01% 480

Other funds holding PRQR

Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
PFM
Privium Fund Management Amsterdam, Netherlands $480M AUM 77.45% 1-Year Est. Return
AAA
Affinity Asset Advisors New York $1.94B AUM 374.45% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
SCM
Sio Capital Management New York $697M AUM 79.73% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $61.9B AUM 29.81% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
KCM
Kynam Capital Management Princeton, New Jersey $1.62B AUM 138.67% 1-Year Est. Return
DCM
DAFNA Capital Management Los Angeles, California $440M AUM 109.12% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 1-Year Est. Return

UBS O'Connor's PRQR Position: Q1 2025 in Review

UBS O'Connor sold out of ProQR Therapeutics (PRQR) in Q1 2025, closing a stake of 227,020 shares — an estimated $602K sold.

UBS O'Connor first reported a position in PRQR in Q1 2023 and held it in 4 quarters. The position peaked at $602K in Q4 2024. 65 funds tracked by Wall St. Rank hold PRQR as of Q1 2025.

  • UBS O'Connor reported no remaining ProQR Therapeutics position as of Q1 2025 after selling out during the quarter.
  • UBS O'Connor sold 227,020 ProQR Therapeutics shares in Q1 2025, an estimated $602K.
  • UBS O'Connor first reported a position in ProQR Therapeutics in Q1 2023 and held it in 4 quarters.
  • UBS O'Connor's ProQR Therapeutics position peaked at $602K in Q4 2024.
  • 65 funds tracked by Wall St. Rank held ProQR Therapeutics as of Q1 2025.

Based on UBS O'Connor's 13F filing for Q1 2025, filed 15 May 2025.