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Brooklyn Investment Group’s Prothena Corp PRTA Stock Holding History

Brooklyn Investment Group’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
Q1 		$146K Buy
14,993
+2,946
+24% +$27K ﹤0.01% 1763
2025
Q4 		$114K Buy
12,047
+934
+8% +$9.51K 0.01% 1455
2025
Q3 		$67.6K Hold
11,113
– – 0.01% 654
2025
Q2 		$67.5K Buy
11,113
+9,359
+534% +$70.2K 0.01% 1172
2025
Q1 		$21.7K Buy
1,754
+1,593
+989% +$22.5K ﹤0.01% 1128
2024
Q4 		$2.23K Buy
+161
New +$2.54K ﹤0.01% 1431

Other funds holding PRTA

Fidelity Investments
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
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
D.E. Shaw & Co
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
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $724M AUM 96.91% 1-Year Est. Return

Brooklyn Investment Group's PRTA Position: Q1 2026 in Review

Brooklyn Investment Group increased its Prothena Corp (PRTA) stake by 24% in Q1 2026, buying an estimated $27K and bringing the position to 14,993 shares worth $146K. The position accounts for ﹤0.01% of the portfolio, ranked #1763.

Brooklyn Investment Group first reported a position in PRTA in Q4 2024 and has held it in 6 quarters since. 186 funds tracked by Wall St. Rank hold PRTA as of Q1 2026.

  • Brooklyn Investment Group held 14,993 shares of Prothena Corp worth $146K as of Q1 2026.
  • Brooklyn Investment Group bought 2,946 Prothena Corp shares in Q1 2026, an estimated $27K.
  • Prothena Corp made up ﹤0.01% of Brooklyn Investment Group's portfolio in Q1 2026, its #1763 holding.
  • Brooklyn Investment Group first reported a position in Prothena Corp in Q4 2024 and has held it in 6 quarters since.
  • 186 funds tracked by Wall St. Rank held Prothena Corp as of Q1 2026.

Based on Brooklyn Investment Group's 13F filing for Q1 2026, filed 29 Apr 2026.