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Quantinno Capital Management’s Prothena Corp PRTA Stock Holding History

Quantinno Capital Management’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 		$1.55M Buy
158,331
+14,032
+10% +$139K ﹤0.01% 2190
2026
Q1 		$1.4M Buy
144,299
+40,681
+39% +$373K ﹤0.01% 1887
2025
Q4 		$990K Buy
103,618
+2,431
+2% +$24.7K ﹤0.01% 1797
2025
Q3 		$988K Buy
101,187
+41,569
+70% +$320K ﹤0.01% 1504
2025
Q2 		$362K Buy
+59,618
New +$447K ﹤0.01% 1877

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

Quantinno Capital Management's PRTA Position: Q2 2026 in Review

Quantinno Capital Management increased its Prothena Corp (PRTA) stake by 9.7% in Q2 2026, buying an estimated $139K and bringing the position to 158,331 shares worth $1.55M. The position accounts for ﹤0.01% of the portfolio, ranked #2190.

Quantinno Capital Management first reported a position in PRTA in Q2 2025 and has held it in 5 quarters since. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Quantinno Capital Management held 158,331 shares of Prothena Corp worth $1.55M as of Q2 2026.
  • Quantinno Capital Management bought 14,032 Prothena Corp shares in Q2 2026, an estimated $139K.
  • Prothena Corp made up ﹤0.01% of Quantinno Capital Management's portfolio in Q2 2026, its #2190 holding.
  • Quantinno Capital Management first reported a position in Prothena Corp in Q2 2025 and has held it in 5 quarters since.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Quantinno Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.