Duncan Williams Asset Management’s Prothena Corp PRTA Stock Holding History

Duncan Williams Asset Management’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	$688K	Hold	70,281	–	–	0.16%	79
2026 Q1	$683K	Hold	70,281	–	–	0.19%	77
2025 Q4	$625K	Sell	70,281 -18,058	-20%	-$184K	0.16%	86
2025 Q3	$862K	Hold	88,339	–	–	0.24%	66
2025 Q2	$536K	Hold	88,339	–	–	0.17%	88
2025 Q1	$1.09M	Buy	88,339 +19,140	+28%	+$271K	0.39%	43
2024 Q4	$958K	Buy	69,199 +20,450	+42%	+$323K	0.38%	45
2024 Q3	$816K	Buy	+48,749	New	+$1.05M	0.45%	45

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

Duncan Williams Asset Management's PRTA Position: Q2 2026 in Review

Duncan Williams Asset Management held its Prothena Corp (PRTA) position steady in Q2 2026 at 70,281 shares worth $688K. The position accounts for 0.16% of the portfolio, ranked #79.

Duncan Williams Asset Management first reported a position in PRTA in Q3 2024 and has held it in 8 quarters since. The position peaked at $1.09M in Q1 2025. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

Duncan Williams Asset Management held 70,281 shares of Prothena Corp worth $688K as of Q2 2026.
Duncan Williams Asset Management left its Prothena Corp share count unchanged in Q2 2026.
Prothena Corp made up 0.16% of Duncan Williams Asset Management's portfolio in Q2 2026, its #79 holding.
Duncan Williams Asset Management first reported a position in Prothena Corp in Q3 2024 and has held it in 8 quarters since.
Duncan Williams Asset Management's Prothena Corp position peaked at $1.09M in Q1 2025.
188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Duncan Williams Asset Management's 13F filing for Q2 2026, filed 22 Jul 2026.