HSBC Holdings’s Prothena Corp PRTA Stock Holding History

HSBC Holdings’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	$492K	Sell	49,569 -15,501	-24%	-$153K	﹤0.01%	2291
2026 Q1	$632K	Buy	65,070 +37,337	+135%	+$342K	﹤0.01%	2103
2025 Q4	$261K	Sell	27,733 -9,699	-26%	-$98.7K	﹤0.01%	2581
2025 Q3	$365K	Sell	37,432 -8,615	-19%	-$66.2K	﹤0.01%	2249
2025 Q2	$282K	Buy	46,047 +32,959	+252%	+$247K	﹤0.01%	2487
2025 Q1	$160K	Sell	13,088 -11,091	-46%	-$157K	﹤0.01%	2686
2024 Q4	$323K	Buy	24,179 +9,101	+60%	+$144K	﹤0.01%	2452
2024 Q3	$245K	Buy	+15,078	New	+$324K	﹤0.01%	2483
2019 Q2	–	Sell	-43,436	Closed	-$527K	–	2825
2019 Q1	$527K	Buy	+43,436	New	+$542K	﹤0.01%	2071
2017 Q1	–	Sell	-5,985	Closed	-$294K	–	2483
2016 Q4	$294K	Buy	+5,985	New	+$330K	﹤0.01%	2250

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

HSBC Holdings's PRTA Position: Q2 2026 in Review

HSBC Holdings reduced its Prothena Corp (PRTA) stake by 24% in Q2 2026, selling an estimated $153K and leaving 49,569 shares worth $492K. The position accounts for ﹤0.01% of the portfolio, ranked #2291.

HSBC Holdings first reported a position in PRTA in Q4 2016 and has held it in 10 quarters since. The position peaked at $632K in Q1 2026. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

HSBC Holdings held 49,569 shares of Prothena Corp worth $492K as of Q2 2026.
HSBC Holdings sold 15,501 Prothena Corp shares in Q2 2026, an estimated $153K.
Prothena Corp made up ﹤0.01% of HSBC Holdings's portfolio in Q2 2026, its #2291 holding.
HSBC Holdings first reported a position in Prothena Corp in Q4 2016 and has held it in 10 quarters since.
HSBC Holdings's Prothena Corp position peaked at $632K in Q1 2026.
188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on HSBC Holdings's 13F filing for Q2 2026, filed 14 Aug 2026.