Vontobel Holding’s Prothena Corp PRTA Stock Holding History

Vontobel Holding’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 Q2	–	Sell	-10,000	Closed	-$97.2K	–	1531
2026 Q1	$97.2K	Buy	+10,000	New	+$91.6K	﹤0.01%	1148

Other funds holding PRTA

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 New York $6.73T AUM 46.02% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

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 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

Vontobel Holding's PRTA Position: Q2 2026 in Review

Vontobel Holding sold out of Prothena Corp (PRTA) in Q2 2026, closing a stake of 10,000 shares — an estimated $97.2K sold.

Vontobel Holding first reported a position in PRTA in Q1 2026 and held it in 1 quarter. The position peaked at $97.2K in Q1 2026. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

Vontobel Holding reported no remaining Prothena Corp position as of Q2 2026 after selling out during the quarter.
Vontobel Holding sold 10,000 Prothena Corp shares in Q2 2026, an estimated $97.2K.
Vontobel Holding first reported a position in Prothena Corp in Q1 2026 and held it in 1 quarter.
Vontobel Holding's Prothena Corp position peaked at $97.2K in Q1 2026.
188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Vontobel Holding's 13F filing for Q2 2026, filed 3 Aug 2026.