Commonwealth Equity Services
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Commonwealth Equity Services’s Prothena Corp PRTA Stock Holding History

Commonwealth Equity Services’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 		$112K Sell
11,410
-520
-4% -$5.13K ﹤0.01% 4236
2026
Q1 		$116K Buy
+11,930
New +$109K ﹤0.01% 4111
2025
Q3 		– Sell
-11,820
Closed -$72K – 4396
2025
Q2 		$72K Sell
11,820
-1,500
-11% -$11.3K ﹤0.01% 4117
2025
Q1 		$165K Buy
+13,320
New +$188K ﹤0.01% 3893

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

Commonwealth Equity Services's PRTA Position: Q2 2026 in Review

Commonwealth Equity Services reduced its Prothena Corp (PRTA) stake by 4.4% in Q2 2026, selling an estimated $5.13K and leaving 11,410 shares worth $112K. The position accounts for ﹤0.01% of the portfolio, ranked #4236.

Commonwealth Equity Services first reported a position in PRTA in Q1 2025 and has held it in 4 quarters since. The position peaked at $165K in Q1 2025. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Commonwealth Equity Services held 11,410 shares of Prothena Corp worth $112K as of Q2 2026.
  • Commonwealth Equity Services sold 520 Prothena Corp shares in Q2 2026, an estimated $5.13K.
  • Prothena Corp made up ﹤0.01% of Commonwealth Equity Services's portfolio in Q2 2026, its #4236 holding.
  • Commonwealth Equity Services first reported a position in Prothena Corp in Q1 2025 and has held it in 4 quarters since.
  • Commonwealth Equity Services's Prothena Corp position peaked at $165K in Q1 2025.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Commonwealth Equity Services's 13F filing for Q2 2026, filed 29 Jul 2026.