Susquehanna International Group
PRTA icon

Susquehanna International Group’s Prothena Corp PRTA Stock Holding History

Susquehanna International Group’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
2026
Q1 		$1.34M Sell
138,000
-98,800
-42% -$905K ﹤0.01% 7168
2025
Q4 		$2.26M Sell
236,800
-130,100
-35% -$1.32M ﹤0.01% 5389
2025
Q3 		$3.58M Sell
366,900
-17,000
-4% -$131K ﹤0.01% 4646
2025
Q2 		$2.33M Buy
383,900
+353,200
+1,150% +$2.65M ﹤0.01% 5468
2025
Q1 		$380K Sell
30,700
-226,300
-88% -$3.2M ﹤0.01% 9523
2024
Q4 		$3.56M Buy
257,000
+144,100
+128% +$2.27M ﹤0.01% 4145
2024
Q3 		$1.89M Buy
112,900
+57,700
+105% +$1.24M ﹤0.01% 5376
2024
Q2 		$1.14M Sell
55,200
-29,700
-35% -$643K ﹤0.01% 6288
2024
Q1 		$2.1M Sell
84,900
-456,600
-84% -$13.6M ﹤0.01% 5215
2023
Q4 		$19.7M Buy
541,500
+498,800
+1,168% +$19.2M ﹤0.01% 1835
2023
Q3 		$2.06M Sell
42,700
-82,400
-66% -$4.9M ﹤0.01% 5067
2023
Q2 		$8.54M Buy
125,100
+36,000
+40% +$2.32M ﹤0.01% 2719
2023
Q1 		$4.32M Sell
89,100
-12,600
-12% -$666K ﹤0.01% 3669
2022
Q4 		$6.13M Sell
101,700
-23,600
-19% -$1.38M ﹤0.01% 2924
2022
Q3 		$7.6M Sell
125,300
-15,700
-11% -$496K ﹤0.01% 2543
2022
Q2 		$3.83M Buy
141,000
+105,600
+298% +$3.09M ﹤0.01% 3645
2022
Q1 		$1.29M Sell
35,400
-58,300
-62% -$2.1M ﹤0.01% 6491
2021
Q4 		$4.63M Sell
93,700
-15,700
-14% -$871K ﹤0.01% 3876
2021
Q3 		$7.79M Buy
109,400
+28,800
+36% +$1.79M ﹤0.01% 3247
2021
Q2 		$4.14M Sell
80,600
-70,400
-47% -$2.2M ﹤0.01% 4372
2021
Q1 		$3.79M Buy
151,000
+73,600
+95% +$1.38M ﹤0.01% 4461
2020
Q4 		$930K Buy
77,400
+51,000
+193% +$603K ﹤0.01% 6881
2020
Q3 		$264K Buy
+26,400
New +$318K ﹤0.01% 8967
2020
Q2 		– Sell
-51,000
Closed -$546K – 10746
2020
Q1 		$546K Buy
51,000
+14,000
+38% +$170K ﹤0.01% 6746
2019
Q4 		$586K Sell
37,000
-47,100
-56% -$505K ﹤0.01% 6637
2019
Q3 		$659K Buy
84,100
+65,600
+355% +$583K ﹤0.01% 6658
2019
Q2 		$196K Sell
18,500
-10,500
-36% -$108K ﹤0.01% 9138
2019
Q1 		$352K Sell
29,000
-37,200
-56% -$464K ﹤0.01% 6933
2018
Q4 		$682K Sell
66,200
-8,100
-11% -$96.3K ﹤0.01% 5421
2018
Q3 		$972K Sell
74,300
-5,900
-7% -$85.2K ﹤0.01% 5272
2018
Q2 		$1.17M Sell
80,200
-162,700
-67% -$3.21M ﹤0.01% 5012
2018
Q1 		$8.92M Buy
242,900
+188,800
+349% +$6.87M ﹤0.01% 1893
2017
Q4 		$2.03M Buy
54,100
+14,900
+38% +$759K ﹤0.01% 3885
2017
Q3 		$2.54M Buy
39,200
+1,300
+3% +$79.6K ﹤0.01% 3486
2017
Q2 		$2.05M Sell
37,900
-54,000
-59% -$2.88M ﹤0.01% 3863
2017
Q1 		$5.13M Buy
91,900
+30,800
+50% +$1.62M ﹤0.01% 2333
2016
Q4 		$3.01M Buy
61,100
+38,100
+166% +$2.1M ﹤0.01% 3240
2016
Q3 		$1.38M Sell
23,000
-61,600
-73% -$3.3M ﹤0.01% 4200
2016
Q2 		$2.96M Buy
84,600
+12,700
+18% +$553K ﹤0.01% 2956
2016
Q1 		$2.96M Sell
71,900
-23,300
-24% -$912K ﹤0.01% 3076
2015
Q4 		$6.48M Sell
95,200
-2,500
-3% -$151K ﹤0.01% 2203
2015
Q3 		$4.43M Buy
97,700
+4,800
+5% +$280K ﹤0.01% 2848
2015
Q2 		$4.89M Sell
92,900
-9,400
-9% -$371K ﹤0.01% 2948
2015
Q1 		$3.9M Buy
102,300
+61,100
+148% +$1.57M ﹤0.01% 3110
2014
Q4 		$855K Sell
41,200
-37,400
-48% -$780K ﹤0.01% 6169
2014
Q3 		$1.74M Buy
78,600
+6,100
+8% +$129K ﹤0.01% 4845
2014
Q2 		$1.64M Buy
72,500
+13,500
+23% +$338K ﹤0.01% 5050
2014
Q1 		$2.26M Buy
59,000
+25,400
+76% +$819K ﹤0.01% 4129
2013
Q4 		$891K Buy
+33,600
New +$843K ﹤0.01% 5708

Other funds holding PRTA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return

Susquehanna International Group's PRTA Position: Q1 2026 in Review

Susquehanna International Group increased its Prothena Corp (PRTA) stake by 11% in Q1 2026, buying an estimated $16.7K and bringing the position to 17,792 shares worth $173K. The position accounts for ﹤0.01% of the portfolio, ranked #11845.

Susquehanna International Group first reported a position in PRTA in Q2 2013 and has held it in 46 quarters since. The position peaked at $5.98M in Q3 2022. 185 funds tracked by Wall St. Rank hold PRTA as of Q1 2026.

  • Susquehanna International Group held 17,792 shares of Prothena Corp worth $173K as of Q1 2026.
  • Susquehanna International Group bought 1,817 Prothena Corp shares in Q1 2026, an estimated $16.7K.
  • Prothena Corp made up ﹤0.01% of Susquehanna International Group's portfolio in Q1 2026, its #11845 holding.
  • Susquehanna International Group first reported a position in Prothena Corp in Q2 2013 and has held it in 46 quarters since.
  • Susquehanna International Group's Prothena Corp position peaked at $5.98M in Q3 2022.
  • 185 funds tracked by Wall St. Rank held Prothena Corp as of Q1 2026.

Based on Susquehanna International Group's 13F filing for Q1 2026, filed 15 May 2026.