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Clearstead Advisors’s Prothena Corp PRTA Stock Holding History

Clearstead 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 		$40 Hold
4
– – ﹤0.01% 3511
2026
Q1 		$39 Sell
4
-6
-60% -$55 ﹤0.01% 2215
2025
Q4 		$96 Sell
10
-11
-52% -$112 ﹤0.01% 2522
2025
Q3 		$205 Buy
21
+17
+425% +$131 ﹤0.01% 2857
2025
Q2 		$25 Hold
4
– – ﹤0.01% 2697
2025
Q1 		$50 Hold
4
– – ﹤0.01% 2161
2024
Q4 		$56 Hold
4
– – ﹤0.01% 2063
2024
Q3 		$67 Hold
4
– – ﹤0.01% 2004
2024
Q2 		$83 Buy
+4
New +$87 ﹤0.01% 1991

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

Clearstead Advisors's PRTA Position: Q2 2026 in Review

Clearstead Advisors held its Prothena Corp (PRTA) position steady in Q2 2026 at 4 shares worth $40. The position accounts for ﹤0.01% of the portfolio, ranked #3511.

Clearstead Advisors first reported a position in PRTA in Q2 2024 and has held it in 9 quarters since. The position peaked at $205 in Q3 2025. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Clearstead Advisors held 4 shares of Prothena Corp worth $40 as of Q2 2026.
  • Clearstead Advisors left its Prothena Corp share count unchanged in Q2 2026.
  • Prothena Corp made up ﹤0.01% of Clearstead Advisors's portfolio in Q2 2026, its #3511 holding.
  • Clearstead Advisors first reported a position in Prothena Corp in Q2 2024 and has held it in 9 quarters since.
  • Clearstead Advisors's Prothena Corp position peaked at $205 in Q3 2025.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Clearstead Advisors's 13F filing for Q2 2026, filed 6 Aug 2026.