Janney Montgomery Scott
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Janney Montgomery Scott’s Prothena Corp PRTA Stock Holding History

Janney Montgomery Scott’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
Q4 		– Sell
-106,898
Closed -$1.04M – 2998
2025
Q3 		$1.04M Buy
+106,898
New +$822K ﹤0.01% 1670

Other funds holding PRTA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
AC
Armistice Capital New York $8.17B AUM 68.82% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $724M AUM 96.91% 1-Year Est. Return

Janney Montgomery Scott's PRTA Position: Q4 2025 in Review

Janney Montgomery Scott sold out of Prothena Corp (PRTA) in Q4 2025, closing a stake of 106,898 shares — an estimated $1.04M sold.

Janney Montgomery Scott first reported a position in PRTA in Q3 2025 and held it in 1 quarter. The position peaked at $1.04M in Q3 2025. 181 funds tracked by Wall St. Rank hold PRTA as of Q4 2025.

  • Janney Montgomery Scott reported no remaining Prothena Corp position as of Q4 2025 after selling out during the quarter.
  • Janney Montgomery Scott sold 106,898 Prothena Corp shares in Q4 2025, an estimated $1.04M.
  • Janney Montgomery Scott first reported a position in Prothena Corp in Q3 2025 and held it in 1 quarter.
  • Janney Montgomery Scott's Prothena Corp position peaked at $1.04M in Q3 2025.
  • 181 funds tracked by Wall St. Rank held Prothena Corp as of Q4 2025.

Based on Janney Montgomery Scott's 13F filing for Q4 2025, filed 11 Feb 2026.