Assenagon Asset Management
PRTA icon

Assenagon Asset Management’s Prothena Corp PRTA Stock Holding History

Assenagon Asset Management’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 		$615K Sell
62,785
-13,984
-18% -$138K ﹤0.01% 1046
2026
Q1 		$746K Hold
76,769
– – ﹤0.01% 945
2025
Q4 		$733K Sell
76,769
-12,935
-14% -$132K ﹤0.01% 1001
2025
Q3 		$876K Buy
+89,704
New +$690K ﹤0.01% 958

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 $3.38T AUM 44.17% 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

Assenagon Asset Management's PRTA Position: Q2 2026 in Review

Assenagon Asset Management reduced its Prothena Corp (PRTA) stake by 18% in Q2 2026, selling an estimated $138K and leaving 62,785 shares worth $615K. The position accounts for ﹤0.01% of the portfolio, ranked #1046.

Assenagon Asset Management first reported a position in PRTA in Q3 2025 and has held it in 4 quarters since. The position peaked at $876K in Q3 2025. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Assenagon Asset Management held 62,785 shares of Prothena Corp worth $615K as of Q2 2026.
  • Assenagon Asset Management sold 13,984 Prothena Corp shares in Q2 2026, an estimated $138K.
  • Prothena Corp made up ﹤0.01% of Assenagon Asset Management's portfolio in Q2 2026, its #1046 holding.
  • Assenagon Asset Management first reported a position in Prothena Corp in Q3 2025 and has held it in 4 quarters since.
  • Assenagon Asset Management's Prothena Corp position peaked at $876K in Q3 2025.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Assenagon Asset Management's 13F filing for Q2 2026, filed 8 Jul 2026.