Cary Street Partners’s Prothena Corp PRTA Stock Holding History

Cary Street Partners’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	$122K	Hold	12,500	–	–	﹤0.01%	988
2026 Q1	$122K	Hold	12,500	–	–	﹤0.01%	887
2025 Q4	$119K	Hold	12,500	–	–	﹤0.01%	893
2025 Q3	$122K	Hold	12,500	–	–	﹤0.01%	850
2025 Q2	$75.9K	Hold	12,500	–	–	﹤0.01%	849
2025 Q1	$155K	Hold	12,500	–	–	﹤0.01%	787
2024 Q4	$173K	Buy	+12,500	New	+$197K	0.01%	748

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

Cary Street Partners's PRTA Position: Q2 2026 in Review

Cary Street Partners held its Prothena Corp (PRTA) position steady in Q2 2026 at 12,500 shares worth $122K. The position accounts for ﹤0.01% of the portfolio, ranked #988.

Cary Street Partners first reported a position in PRTA in Q4 2024 and has held it in 7 quarters since. The position peaked at $173K in Q4 2024. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

Cary Street Partners held 12,500 shares of Prothena Corp worth $122K as of Q2 2026.
Cary Street Partners left its Prothena Corp share count unchanged in Q2 2026.
Prothena Corp made up ﹤0.01% of Cary Street Partners's portfolio in Q2 2026, its #988 holding.
Cary Street Partners first reported a position in Prothena Corp in Q4 2024 and has held it in 7 quarters since.
Cary Street Partners's Prothena Corp position peaked at $173K in Q4 2024.
188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Cary Street Partners's 13F filing for Q2 2026, filed 17 Jul 2026.