Bank of America’s Prothena Corp PRTA Stock Holding History

Bank of America’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
2023 Q3	–	Sell	-30,000	Closed	-$2.05M	–	7906
2023 Q2	$2.05M	Buy	+30,000	New	+$1.93M	﹤0.01%	4216
2021 Q2	–	Sell	-98,000	Closed	-$2.46M	–	8005
2021 Q1	$2.46M	Buy	+98,000	New	+$1.84M	﹤0.01%	4076
2020 Q1	–	Sell	-18,600	Closed	-$294K	–	7159
2019 Q4	$294K	Buy	+18,600	New	+$199K	﹤0.01%	5380
2018 Q3	–	Sell	-94,500	Closed	-$1.38M	–	7427
2018 Q2	$1.38M	Buy	+94,500	New	+$1.87M	﹤0.01%	4260
2018 Q1	–	Sell	-1,400	Closed	-$52K	–	7286
2017 Q4	$52K	Buy	+1,400	New	+$71.3K	﹤0.01%	6052

Other funds holding PRTA

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

RCMNY

Rubric Capital Management (New York) New York $9.44B AUM 68.42% 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

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

ACM

ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

PAI

Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return

Bank of America's PRTA Position: Q1 2026 in Review

Bank of America reduced its Prothena Corp (PRTA) stake by 7.9% in Q1 2026, selling an estimated $309K and leaving 393,632 shares worth $3.83M. The position accounts for ﹤0.01% of the portfolio, ranked #3660.

Bank of America first reported a position in PRTA in Q2 2013 and has held it in 52 quarters since. The position peaked at $37.3M in Q2 2014. 185 funds tracked by Wall St. Rank hold PRTA as of Q1 2026.

Bank of America held 393,632 shares of Prothena Corp worth $3.83M as of Q1 2026.
Bank of America sold 33,728 Prothena Corp shares in Q1 2026, an estimated $309K.
Prothena Corp made up ﹤0.01% of Bank of America's portfolio in Q1 2026, its #3660 holding.
Bank of America first reported a position in Prothena Corp in Q2 2013 and has held it in 52 quarters since.
Bank of America's Prothena Corp position peaked at $37.3M in Q2 2014.
185 funds tracked by Wall St. Rank held Prothena Corp as of Q1 2026.

Based on Bank of America's 13F filing for Q1 2026, filed 18 May 2026.