DRW Securities’s Prothena Corp PRTA Stock Holding History

DRW Securities’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	-11,955	Closed	-$114K	–	1633
2025 Q4	$114K	Buy	+11,955	New	+$122K	﹤0.01%	1052

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 $3.38T AUM 44.17% 1-Year Est. Return

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

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

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

PAI

Palo Alto Investors Palo Alto, California $724M AUM 96.91% 1-Year Est. Return

DRW Securities's PRTA Position: Q1 2026 in Review

DRW Securities sold out of Prothena Corp (PRTA) in Q1 2026, closing a stake of 11,955 shares — an estimated $114K sold.

DRW Securities first reported a position in PRTA in Q4 2025 and held it in 1 quarter. The position peaked at $114K in Q4 2025. 186 funds tracked by Wall St. Rank hold PRTA as of Q1 2026.

DRW Securities reported no remaining Prothena Corp position as of Q1 2026 after selling out during the quarter.
DRW Securities sold 11,955 Prothena Corp shares in Q1 2026, an estimated $114K.
DRW Securities first reported a position in Prothena Corp in Q4 2025 and held it in 1 quarter.
DRW Securities's Prothena Corp position peaked at $114K in Q4 2025.
186 funds tracked by Wall St. Rank held Prothena Corp as of Q1 2026.

Based on DRW Securities's 13F filing for Q1 2026, filed 13 May 2026.