YIH
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Y-Intercept (HK)’s Prothena Corp PRTA Stock Holding History

Y-Intercept (HK)’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 		– Sell
-100,805
Closed -$980K – 2069
2026
Q1 		$980K Buy
100,805
+295
+0.3% +$2.7K 0.02% 1040
2025
Q4 		$960K Buy
100,510
+88,339
+726% +$899K 0.02% 995
2025
Q3 		$119K Buy
+12,171
New +$93.6K ﹤0.01% 1486
2024
Q3 		– Sell
-21,351
Closed -$441K – 1707
2024
Q2 		$441K Buy
+21,351
New +$462K 0.02% 873

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

Y-Intercept (HK)'s PRTA Position: Q2 2026 in Review

Y-Intercept (HK) sold out of Prothena Corp (PRTA) in Q2 2026, closing a stake of 100,805 shares — an estimated $980K sold.

Y-Intercept (HK) first reported a position in PRTA in Q2 2024 and held it in 4 quarters. The position peaked at $980K in Q1 2026. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Y-Intercept (HK) reported no remaining Prothena Corp position as of Q2 2026 after selling out during the quarter.
  • Y-Intercept (HK) sold 100,805 Prothena Corp shares in Q2 2026, an estimated $980K.
  • Y-Intercept (HK) first reported a position in Prothena Corp in Q2 2024 and held it in 4 quarters.
  • Y-Intercept (HK)'s Prothena Corp position peaked at $980K in Q1 2026.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Y-Intercept (HK)'s 13F filing for Q2 2026, filed 14 Jul 2026.