Optiver Holding
PRTA icon

Optiver Holding’s Prothena Corp PRTA Stock Holding History

Optiver Holding’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 		$1.56K Sell
159
-138
-46% -$1.36K ﹤0.01% 2380
2026
Q1 		$2.89K Buy
297
+1
+0.3% +$9 ﹤0.01% 1683
2025
Q4 		$2.83K Sell
296
-56
-16% -$570 ﹤0.01% 1794
2025
Q3 		$3.44K Buy
+352
New +$2.71K ﹤0.01% 2079

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

Optiver Holding's PRTA Position: Q2 2026 in Review

Optiver Holding reduced its Prothena Corp (PRTA) stake by 46% in Q2 2026, selling an estimated $1.36K and leaving 159 shares worth $1.56K. The position accounts for ﹤0.01% of the portfolio, ranked #2380.

Optiver Holding first reported a position in PRTA in Q3 2025 and has held it in 4 quarters since. The position peaked at $3.44K in Q3 2025. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Optiver Holding held 159 shares of Prothena Corp worth $1.56K as of Q2 2026.
  • Optiver Holding sold 138 Prothena Corp shares in Q2 2026, an estimated $1.36K.
  • Prothena Corp made up ﹤0.01% of Optiver Holding's portfolio in Q2 2026, its #2380 holding.
  • Optiver Holding first reported a position in Prothena Corp in Q3 2025 and has held it in 4 quarters since.
  • Optiver Holding's Prothena Corp position peaked at $3.44K in Q3 2025.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Optiver Holding's 13F filing for Q2 2026, filed 12 Aug 2026.