Ohio Public Employees Retirement System (OPERS)
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Ohio Public Employees Retirement System (OPERS)’s Prothena Corp PRTA Stock Holding History

Ohio Public Employees Retirement System (OPERS)’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 		$413K Hold
42,158
– – ﹤0.01% 1529
2026
Q1 		$410K Hold
42,158
– – ﹤0.01% 1528
2025
Q4 		$403K Hold
42,158
– – ﹤0.01% 1546
2025
Q3 		$411K Hold
42,158
– – ﹤0.01% 1538
2025
Q2 		$256K Buy
+42,158
New +$316K ﹤0.01% 1613

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

Ohio Public Employees Retirement System (OPERS)'s PRTA Position: Q2 2026 in Review

Ohio Public Employees Retirement System (OPERS) held its Prothena Corp (PRTA) position steady in Q2 2026 at 42,158 shares worth $413K. The position accounts for ﹤0.01% of the portfolio, ranked #1529.

Ohio Public Employees Retirement System (OPERS) 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.

  • Ohio Public Employees Retirement System (OPERS) held 42,158 shares of Prothena Corp worth $413K as of Q2 2026.
  • Ohio Public Employees Retirement System (OPERS) left its Prothena Corp share count unchanged in Q2 2026.
  • Prothena Corp made up ﹤0.01% of Ohio Public Employees Retirement System (OPERS)'s portfolio in Q2 2026, its #1529 holding.
  • Ohio Public Employees Retirement System (OPERS) 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 Ohio Public Employees Retirement System (OPERS)'s 13F filing for Q2 2026, filed 17 Aug 2026.