Covestor’s Prothena Corp PRTA Stock Holding History

Covestor’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	$246K	Sell	25,190 -7,467	-23%	-$73.7K	0.14%	100
2026 Q1	$317K	Buy	32,657 +10,864	+50%	+$99.6K	0.22%	70
2025 Q4	$208K	Sell	21,793 -9,639	-31%	-$98.1K	0.11%	203
2025 Q3	$307K	Sell	31,432 -10,863	-26%	-$83.5K	0.17%	78
2025 Q2	$257K	Buy	42,295 +42,291	+1,057,275%	+$317K	0.15%	98
2025 Q1	$0	Hold	4	–	–	﹤0.01%	2620
2024 Q4	$0	Hold	4	–	–	﹤0.01%	2629
2024 Q3	$0	Hold	4	–	–	﹤0.01%	2639
2024 Q2	$0	Hold	4	–	–	﹤0.01%	2641
2024 Q1	$0	Buy	4 +1	+33%	+$30	﹤0.01%	2627
2023 Q4	$0	Hold	3	–	–	﹤0.01%	2585
2023 Q3	$0	Hold	3	–	–	﹤0.01%	2579
2023 Q2	$0	Hold	3	–	–	﹤0.01%	2529
2023 Q1	$0	Hold	3	–	–	﹤0.01%	2455
2022 Q4	$0	Sell	3 -1	-25%	-$59	﹤0.01%	2479
2022 Q3	$0	Buy	+4	New	+$126	﹤0.01%	2449

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

Covestor's PRTA Position: Q2 2026 in Review

Covestor reduced its Prothena Corp (PRTA) stake by 23% in Q2 2026, selling an estimated $73.7K and leaving 25,190 shares worth $246K. The position accounts for 0.14% of the portfolio, ranked #100.

Covestor first reported a position in PRTA in Q3 2022 and has held it in 16 quarters since. The position peaked at $317K in Q1 2026. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

Covestor held 25,190 shares of Prothena Corp worth $246K as of Q2 2026.
Covestor sold 7,467 Prothena Corp shares in Q2 2026, an estimated $73.7K.
Prothena Corp made up 0.14% of Covestor's portfolio in Q2 2026, its #100 holding.
Covestor first reported a position in Prothena Corp in Q3 2022 and has held it in 16 quarters since.
Covestor's Prothena Corp position peaked at $317K in Q1 2026.
188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

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