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Dark Forest Capital Management’s Prothena Corp PRTA Stock Holding History

Dark Forest Capital 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
2025
Q3 		– Sell
-32,866
Closed -$199K – 1418
2025
Q2 		$199K Buy
32,866
+11,807
+56% +$88.6K 0.01% 1091
2025
Q1 		$261K Buy
+21,059
New +$298K 0.01% 1098
2022
Q1 		– Sell
-2
Closed – – 1664
2021
Q4 		$0 Buy
+2
New +$111 ﹤0.01% 1707

Other funds holding PRTA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 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

Dark Forest Capital Management's PRTA Position: Q3 2025 in Review

Dark Forest Capital Management sold out of Prothena Corp (PRTA) in Q3 2025, closing a stake of 32,866 shares — an estimated $199K sold.

Dark Forest Capital Management first reported a position in PRTA in Q4 2021 and held it in 3 quarters. The position peaked at $261K in Q1 2025. 187 funds tracked by Wall St. Rank hold PRTA as of Q3 2025.

  • Dark Forest Capital Management reported no remaining Prothena Corp position as of Q3 2025 after selling out during the quarter.
  • Dark Forest Capital Management sold 32,866 Prothena Corp shares in Q3 2025, an estimated $199K.
  • Dark Forest Capital Management first reported a position in Prothena Corp in Q4 2021 and held it in 3 quarters.
  • Dark Forest Capital Management's Prothena Corp position peaked at $261K in Q1 2025.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q3 2025.

Based on Dark Forest Capital Management's 13F filing for Q3 2025, filed 14 Nov 2025.