HighMark Wealth Management’s Prothena Corp PRTA Stock Holding History

HighMark Wealth 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	$8.81K	Hold	900	–	–	﹤0.01%	336
2026 Q1	$8.75K	Hold	900	–	–	﹤0.01%	309
2025 Q4	$8.6K	Sell	900 -1,108	-55%	-$11.3K	﹤0.01%	334
2025 Q3	$19.6K	Sell	2,008 -10	-0.5%	-$77	0.01%	236
2025 Q2	$12.2K	Hold	2,018	–	–	0.01%	282
2025 Q1	$25K	Sell	2,018 -9,150	-82%	-$129K	0.01%	181
2024 Q4	$155K	Sell	11,168 -5,334	-32%	-$84.1K	0.09%	62
2024 Q3	$276K	Hold	16,502	–	–	0.15%	51
2024 Q2	$341K	Hold	16,502	–	–	0.21%	47
2024 Q1	$409K	Buy	16,502 +9,150	+124%	+$272K	0.25%	41
2023 Q4	$267K	Hold	7,352	–	–	0.2%	49
2023 Q3	$355K	Hold	7,352	–	–	0.29%	34
2023 Q2	$502K	Hold	7,352	–	–	0.38%	30
2023 Q1	$356K	Sell	7,352 -175	-2%	-$9.24K	0.28%	36
2022 Q4	$454K	Buy	7,527 +6,352	+541%	+$372K	0.34%	31
2022 Q3	$71K	Hold	1,175	–	–	0.06%	80
2022 Q2	$32K	Hold	1,175	–	–	0.03%	124
2022 Q1	$43K	Buy	1,175 +100	+9%	+$3.6K	0.03%	117
2021 Q4	$53K	Sell	1,075 -721	-40%	-$40K	0.03%	115
2021 Q3	$128K	Sell	1,796 -308	-15%	-$19.1K	0.09%	66
2021 Q2	$108K	Sell	2,104 -465	-18%	-$14.5K	0.08%	74
2021 Q1	$65K	Sell	2,569 -186	-7%	-$3.5K	0.05%	91
2020 Q4	$33K	Buy	+2,755	New	+$32.6K	0.03%	125

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

HighMark Wealth Management's PRTA Position: Q2 2026 in Review

HighMark Wealth Management held its Prothena Corp (PRTA) position steady in Q2 2026 at 900 shares worth $8.81K. The position accounts for ﹤0.01% of the portfolio, ranked #336.

HighMark Wealth Management first reported a position in PRTA in Q4 2020 and has held it in 23 quarters since. The position peaked at $502K in Q2 2023. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

HighMark Wealth Management held 900 shares of Prothena Corp worth $8.81K as of Q2 2026.
HighMark Wealth Management left its Prothena Corp share count unchanged in Q2 2026.
Prothena Corp made up ﹤0.01% of HighMark Wealth Management's portfolio in Q2 2026, its #336 holding.
HighMark Wealth Management first reported a position in Prothena Corp in Q4 2020 and has held it in 23 quarters since.
HighMark Wealth Management's Prothena Corp position peaked at $502K in Q2 2023.
188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on HighMark Wealth Management's 13F filing for Q2 2026, filed 12 Aug 2026.