Gould Capital’s Prothena Corp PRTA Stock Holding History

Gould Capital’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	$979	Hold	100	–	–	﹤0.01%	206
2026 Q1	$972	Hold	100	–	–	﹤0.01%	191
2025 Q4	$955	Hold	100	–	–	﹤0.01%	194
2025 Q3	$976	Hold	100	–	–	﹤0.01%	203
2025 Q2	$607	Hold	100	–	–	﹤0.01%	207
2025 Q1	$1.24K	Hold	100	–	–	﹤0.01%	186
2024 Q4	$1.39K	Hold	100	–	–	﹤0.01%	187
2024 Q3	$1.67K	Hold	100	–	–	﹤0.01%	183
2024 Q2	$2.06K	Hold	100	–	–	﹤0.01%	184
2024 Q1	$2.48K	Hold	100	–	–	﹤0.01%	175
2023 Q4	$3.63K	Hold	100	–	–	﹤0.01%	173
2023 Q3	$4.66K	Hold	100	–	–	﹤0.01%	164
2023 Q2	$6.83K	Hold	100	–	–	0.01%	157
2023 Q1	$4.85K	Hold	100	–	–	﹤0.01%	170
2022 Q4	$6.03K	Hold	100	–	–	﹤0.01%	165
2022 Q3	$6K	Hold	100	–	–	0.01%	159
2022 Q2	$3K	Hold	100	–	–	﹤0.01%	175
2022 Q1	$4K	Hold	100	–	–	﹤0.01%	166
2021 Q4	$5K	Buy	+100	New	+$5.54K	﹤0.01%	176

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

Gould Capital's PRTA Position: Q2 2026 in Review

Gould Capital held its Prothena Corp (PRTA) position steady in Q2 2026 at 100 shares worth $979. The position accounts for ﹤0.01% of the portfolio, ranked #206.

Gould Capital first reported a position in PRTA in Q4 2021 and has held it in 19 quarters since. The position peaked at $6.83K in Q2 2023. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

Gould Capital held 100 shares of Prothena Corp worth $979 as of Q2 2026.
Gould Capital left its Prothena Corp share count unchanged in Q2 2026.
Prothena Corp made up ﹤0.01% of Gould Capital's portfolio in Q2 2026, its #206 holding.
Gould Capital first reported a position in Prothena Corp in Q4 2021 and has held it in 19 quarters since.
Gould Capital's Prothena Corp position peaked at $6.83K in Q2 2023.
187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Gould Capital's 13F filing for Q2 2026, filed 7 Aug 2026.