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	-9,000	Closed	-$615K	–	7907
2023 Q2	$615K	Buy	+9,000	New	+$580K	﹤0.01%	5127
2021 Q2	–	Sell	-70,000	Closed	-$1.76M	–	8006
2021 Q1	$1.76M	Buy	+70,000	New	+$1.32M	﹤0.01%	4372
2018 Q4	–	Sell	-989,600	Closed	-$12.9M	–	7323
2018 Q3	$12.9M	Buy	+989,600	New	+$14.3M	﹤0.01%	2212
2018 Q1	–	Sell	-500	Closed	-$19K	–	7287
2017 Q4	$19K	Buy	+500	New	+$25.5K	﹤0.01%	6430
2014 Q4	–	Sell	-38,900	Closed	-$862K	–	7887
2014 Q3	$862K	Sell	38,900 -1,100	-3%	-$23.3K	﹤0.01%	4107
2014 Q2	$902K	Buy	+40,000	New	+$1M	﹤0.01%	4076

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 $5.72T AUM 30.48% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 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.