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HRT Financial’s Prothena Corp PRTA Stock Holding History

HRT Financial’s Portfolio PRTA Stock Details PRTA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-31,106
Closed -$303K – 3853
2025
Q3 		$303K Buy
+31,106
New +$239K ﹤0.01% 2165
2025
Q2 		– Sell
-14,036
Closed -$173K – 3358
2025
Q1 		$173K Buy
+14,036
New +$198K ﹤0.01% 2058
2024
Q4 		– Sell
-41,809
Closed -$699K – 3059
2024
Q3 		$699K Buy
41,809
+18,387
+79% +$395K ﹤0.01% 1429
2024
Q2 		$483K Buy
+23,422
New +$507K ﹤0.01% 1314
2024
Q1 		– Sell
-5,904
Closed -$214K – 2926
2023
Q4 		$214K Sell
5,904
-5,555
-48% -$214K ﹤0.01% 1769
2023
Q3 		$552K Buy
+11,459
New +$681K 0.01% 1364
2023
Q2 		– Sell
-6,485
Closed -$314K – 3103
2023
Q1 		$314K Buy
+6,485
New +$343K ﹤0.01% 1690
2022
Q4 		– Sell
-12,363
Closed -$749K – 2994
2022
Q3 		$749K Buy
+12,363
New +$391K 0.01% 1116
2021
Q1 		– Sell
-16,845
Closed -$202K – 3057
2020
Q4 		$202K Sell
16,845
-17,032
-50% -$201K ﹤0.01% 1492
2020
Q3 		$338K Buy
+33,877
New +$408K 0.01% 1072
2020
Q1 		– Sell
-13,732
Closed -$217K – 1226
2019
Q4 		$217K Buy
13,732
+3,718
+37% +$39.9K 0.01% 904
2019
Q3 		$78K Buy
+10,014
New +$89K ﹤0.01% 1264

Other funds holding PRTA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
AC
Armistice Capital New York $8.17B AUM 68.82% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $724M AUM 96.91% 1-Year Est. Return

HRT Financial's PRTA Position: Q4 2025 in Review

HRT Financial sold out of Prothena Corp (PRTA) in Q4 2025, closing a stake of 31,106 shares — an estimated $303K sold.

HRT Financial first reported a position in PRTA in Q3 2019 and held it in 12 quarters. The position peaked at $749K in Q3 2022. 181 funds tracked by Wall St. Rank hold PRTA as of Q4 2025.

  • HRT Financial reported no remaining Prothena Corp position as of Q4 2025 after selling out during the quarter.
  • HRT Financial sold 31,106 Prothena Corp shares in Q4 2025, an estimated $303K.
  • HRT Financial first reported a position in Prothena Corp in Q3 2019 and held it in 12 quarters.
  • HRT Financial's Prothena Corp position peaked at $749K in Q3 2022.
  • 181 funds tracked by Wall St. Rank held Prothena Corp as of Q4 2025.

Based on HRT Financial's 13F filing for Q4 2025, filed 12 Feb 2026.