Edgewood Management’s Prothena Corp PRTA Stock Holding History

Edgewood 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	$490K	Hold	50,000	–	–	0.01%	77
2026 Q1	$486K	Buy	50,000 +25,940	+108%	+$238K	﹤0.01%	76
2025 Q4	$230K	Hold	24,060	–	–	﹤0.01%	86
2025 Q3	$235K	Hold	24,060	–	–	﹤0.01%	85
2025 Q2	$146K	Hold	24,060	–	–	﹤0.01%	80
2025 Q1	$298K	Hold	24,060	–	–	﹤0.01%	74
2024 Q4	$333K	Hold	24,060	–	–	﹤0.01%	74
2024 Q3	$403K	Hold	24,060	–	–	﹤0.01%	66
2024 Q2	$497K	Hold	24,060	–	–	﹤0.01%	69
2024 Q1	$596K	Hold	24,060	–	–	﹤0.01%	66
2023 Q4	$874K	Hold	24,060	–	–	﹤0.01%	60
2023 Q3	$1.16M	Hold	24,060	–	–	﹤0.01%	55
2023 Q2	$1.64M	Hold	24,060	–	–	0.01%	46
2023 Q1	$1.17M	Hold	24,060	–	–	﹤0.01%	53
2022 Q4	$1.45M	Sell	24,060 -940	-4%	-$55K	0.01%	46
2022 Q3	$1.52M	Hold	25,000	–	–	0.01%	42
2022 Q2	$679K	Hold	25,000	–	–	﹤0.01%	57
2022 Q1	$914K	Hold	25,000	–	–	﹤0.01%	52
2021 Q4	$1.24M	Hold	25,000	–	–	﹤0.01%	52
2021 Q3	$1.78M	Hold	25,000	–	–	﹤0.01%	42
2021 Q2	$1.28M	Hold	25,000	–	–	﹤0.01%	48
2021 Q1	$628K	Hold	25,000	–	–	﹤0.01%	62
2020 Q4	$300K	Buy	+25,000	New	+$296K	﹤0.01%	73

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

Edgewood Management's PRTA Position: Q2 2026 in Review

Edgewood Management held its Prothena Corp (PRTA) position steady in Q2 2026 at 50,000 shares worth $490K. The position accounts for 0.01% of the portfolio, ranked #77.

Edgewood Management first reported a position in PRTA in Q4 2020 and has held it in 23 quarters since. The position peaked at $1.78M in Q3 2021. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

Edgewood Management held 50,000 shares of Prothena Corp worth $490K as of Q2 2026.
Edgewood Management left its Prothena Corp share count unchanged in Q2 2026.
Prothena Corp made up 0.01% of Edgewood Management's portfolio in Q2 2026, its #77 holding.
Edgewood Management first reported a position in Prothena Corp in Q4 2020 and has held it in 23 quarters since.
Edgewood Management's Prothena Corp position peaked at $1.78M in Q3 2021.
188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Edgewood Management's 13F filing for Q2 2026, filed 13 Aug 2026.