GLA
PRTA icon

Great Lakes Advisors’s Prothena Corp PRTA Stock Holding History

Great Lakes Advisors’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 		$281K Sell
28,733
-860
-3% -$8.49K ﹤0.01% 723
2026
Q1 		$288K Buy
29,593
+16,404
+124% +$150K ﹤0.01% 704
2025
Q4 		$126K Sell
13,189
-95
-0.7% -$967 ﹤0.01% 790
2025
Q3 		$130K Buy
+13,284
New +$102K ﹤0.01% 785

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 $3.38T AUM 44.17% 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

Great Lakes Advisors's PRTA Position: Q2 2026 in Review

Great Lakes Advisors reduced its Prothena Corp (PRTA) stake by 2.9% in Q2 2026, selling an estimated $8.49K and leaving 28,733 shares worth $281K. The position accounts for ﹤0.01% of the portfolio, ranked #723.

Great Lakes Advisors first reported a position in PRTA in Q3 2025 and has held it in 4 quarters since. The position peaked at $288K in Q1 2026. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Great Lakes Advisors held 28,733 shares of Prothena Corp worth $281K as of Q2 2026.
  • Great Lakes Advisors sold 860 Prothena Corp shares in Q2 2026, an estimated $8.49K.
  • Prothena Corp made up ﹤0.01% of Great Lakes Advisors's portfolio in Q2 2026, its #723 holding.
  • Great Lakes Advisors first reported a position in Prothena Corp in Q3 2025 and has held it in 4 quarters since.
  • Great Lakes Advisors's Prothena Corp position peaked at $288K in Q1 2026.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Great Lakes Advisors's 13F filing for Q2 2026, filed 10 Aug 2026.