Zurich Cantonal Bank’s Prothena Corp PRTA Stock Holding History

Zurich Cantonal Bank’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 Q1	–	Sell	-71	Closed	-$678	–	3289
2025 Q4	$678	Buy	+71	New	+$723	﹤0.01%	2518

Other funds holding PRTA

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

RCMNY

Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

ACM

ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

PAI

Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return

Zurich Cantonal Bank's PRTA Position: Q4 2025 in Review

Zurich Cantonal Bank sold out of Prothena Corp (PRTA) in Q4 2025, closing a stake of 71 shares — an estimated $723 sold.

Zurich Cantonal Bank first reported a position in PRTA in Q2 2015 and held it in 42 quarters. The position peaked at $455K in Q2 2023. 181 funds tracked by Wall St. Rank hold PRTA as of Q4 2025.

Zurich Cantonal Bank reported no remaining Prothena Corp position as of Q4 2025 after selling out during the quarter.
Zurich Cantonal Bank sold 71 Prothena Corp shares in Q4 2025, an estimated $723.
Zurich Cantonal Bank first reported a position in Prothena Corp in Q2 2015 and held it in 42 quarters.
Zurich Cantonal Bank's Prothena Corp position peaked at $455K in Q2 2023.
181 funds tracked by Wall St. Rank held Prothena Corp as of Q4 2025.

Based on Zurich Cantonal Bank's 13F filing for Q4 2025, filed 27 Jan 2026.