JP Morgan Chase
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JP Morgan Chase’s Prothena Corp PRTA Stock Holding History

JP Morgan Chase’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
2022
Q4 		– Sell
-249,900
Closed -$15.2M – 6902
2022
Q3 		$15.2M Hold
249,900
– – ﹤0.01% 1799
2022
Q2 		$6.79M Buy
249,900
+116,100
+87% +$3.4M ﹤0.01% 2497
2022
Q1 		$4.89M Buy
+133,800
New +$4.82M ﹤0.01% 3021

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

JP Morgan Chase's PRTA Position: Q2 2026 in Review

JP Morgan Chase increased its Prothena Corp (PRTA) stake by 2.5% in Q2 2026, buying an estimated $6.45K and bringing the position to 26,620 shares worth $265K. The position accounts for ﹤0.01% of the portfolio, ranked #5468.

JP Morgan Chase first reported a position in PRTA in Q3 2013 and has held it in 49 quarters since. The position peaked at $28.3M in Q2 2023. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • JP Morgan Chase held 26,620 shares of Prothena Corp worth $265K as of Q2 2026.
  • JP Morgan Chase bought 653 Prothena Corp shares in Q2 2026, an estimated $6.45K.
  • Prothena Corp made up ﹤0.01% of JP Morgan Chase's portfolio in Q2 2026, its #5468 holding.
  • JP Morgan Chase first reported a position in Prothena Corp in Q3 2013 and has held it in 49 quarters since.
  • JP Morgan Chase's Prothena Corp position peaked at $28.3M in Q2 2023.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on JP Morgan Chase's 13F filing for Q2 2026, filed 12 Aug 2026.