GI
PRTA icon

GAMMA Investing’s Prothena Corp PRTA Stock Holding History

GAMMA Investing’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 		$25.3K Buy
2,588
+433
+20% +$4.28K ﹤0.01% 2712
2026
Q1 		$20.9K Buy
2,155
+1,645
+323% +$15.1K ﹤0.01% 2691
2025
Q4 		$4.87K Buy
510
+124
+32% +$1.26K ﹤0.01% 3289
2025
Q3 		$3.77K Buy
386
+189
+96% +$1.45K ﹤0.01% 3279
2025
Q2 		$1.2K Sell
197
-288
-59% -$2.16K ﹤0.01% 3503
2025
Q1 		$6K Buy
485
+358
+282% +$5.06K ﹤0.01% 3010
2024
Q4 		$1.76K Buy
127
+60
+90% +$946 ﹤0.01% 3259
2024
Q3 		$1.12K Sell
67
-300
-82% -$6.45K ﹤0.01% 3227
2024
Q2 		$7.58K Buy
367
+309
+533% +$6.69K ﹤0.01% 2388
2024
Q1 		$1.44K Buy
58
+18
+45% +$535 ﹤0.01% 2852
2023
Q4 		$1.14K Buy
+40
New +$1.54K ﹤0.01% 2757

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 $3.37T AUM 44.26% 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
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
Two Sigma Investments
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

GAMMA Investing's PRTA Position: Q2 2026 in Review

GAMMA Investing increased its Prothena Corp (PRTA) stake by 20% in Q2 2026, buying an estimated $4.28K and bringing the position to 2,588 shares worth $25.3K. The position accounts for ﹤0.01% of the portfolio, ranked #2712.

GAMMA Investing first reported a position in PRTA in Q4 2023 and has held it in 11 quarters since. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • GAMMA Investing held 2,588 shares of Prothena Corp worth $25.3K as of Q2 2026.
  • GAMMA Investing bought 433 Prothena Corp shares in Q2 2026, an estimated $4.28K.
  • Prothena Corp made up ﹤0.01% of GAMMA Investing's portfolio in Q2 2026, its #2712 holding.
  • GAMMA Investing first reported a position in Prothena Corp in Q4 2023 and has held it in 11 quarters since.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on GAMMA Investing's 13F filing for Q2 2026, filed 7 Jul 2026.