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Sherbrooke Park Advisers’s Prothena Corp PRTA Stock Holding History

Sherbrooke Park Advisers’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
Q3 		– Sell
-27,221
Closed -$165K – 682
2025
Q2 		$165K Buy
+27,221
New +$204K 0.07% 419
2024
Q4 		– Sell
-27,582
Closed -$461K – 1080
2024
Q3 		$461K Buy
+27,582
New +$593K 0.11% 338

Other funds holding PRTA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
AC
Armistice Capital New York $5.62B AUM 36.06% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Sherbrooke Park Advisers's PRTA Position: Q3 2025 in Review

Sherbrooke Park Advisers sold out of Prothena Corp (PRTA) in Q3 2025, closing a stake of 27,221 shares — an estimated $165K sold.

Sherbrooke Park Advisers first reported a position in PRTA in Q3 2024 and held it in 2 quarters. The position peaked at $461K in Q3 2024. 187 funds tracked by Wall St. Rank hold PRTA as of Q3 2025.

  • Sherbrooke Park Advisers reported no remaining Prothena Corp position as of Q3 2025 after selling out during the quarter.
  • Sherbrooke Park Advisers sold 27,221 Prothena Corp shares in Q3 2025, an estimated $165K.
  • Sherbrooke Park Advisers first reported a position in Prothena Corp in Q3 2024 and held it in 2 quarters.
  • Sherbrooke Park Advisers's Prothena Corp position peaked at $461K in Q3 2024.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q3 2025.

Based on Sherbrooke Park Advisers's 13F filing for Q3 2025, filed 14 Nov 2025.