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Susquehanna Portfolio Strategies’s Prothena Corp PRTA Stock Holding History

Susquehanna Portfolio Strategies’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
Q2 		$810K Buy
82,710
+14,840
+22% +$147K 0.01% 589
2026
Q1 		$660K Buy
67,870
+9,017
+15% +$82.6K 0.01% 709
2025
Q4 		$562K Buy
58,853
+29,878
+103% +$304K 0.01% 760
2025
Q3 		$283K Sell
28,975
-42,693
-60% -$328K ﹤0.01% 923
2025
Q2 		$435K Buy
+71,668
New +$538K 0.01% 688
2024
Q1 		– Sell
-20,158
Closed -$733K – 917
2023
Q4 		$733K Buy
+20,158
New +$776K 0.01% 672

Other funds holding PRTA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $724M AUM 96.91% 1-Year Est. Return

Susquehanna Portfolio Strategies's PRTA Position: Q2 2026 in Review

Susquehanna Portfolio Strategies increased its Prothena Corp (PRTA) stake by 22% in Q2 2026, buying an estimated $147K and bringing the position to 82,710 shares worth $810K. The position accounts for 0.01% of the portfolio, ranked #589.

Susquehanna Portfolio Strategies first reported a position in PRTA in Q4 2023 and has held it in 6 quarters since. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Susquehanna Portfolio Strategies held 82,710 shares of Prothena Corp worth $810K as of Q2 2026.
  • Susquehanna Portfolio Strategies bought 14,840 Prothena Corp shares in Q2 2026, an estimated $147K.
  • Prothena Corp made up 0.01% of Susquehanna Portfolio Strategies's portfolio in Q2 2026, its #589 holding.
  • Susquehanna Portfolio Strategies first reported a position in Prothena Corp in Q4 2023 and has held it in 6 quarters since.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Susquehanna Portfolio Strategies's 13F filing for Q2 2026, filed 14 Aug 2026.