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HM Payson & Co’s Prothena Corp PRTA Stock Holding History

HM Payson & Co’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 		$5.87K Hold
600
– – ﹤0.01% 970
2026
Q1 		$5.83K Hold
600
– – ﹤0.01% 964
2025
Q4 		$5.73K Hold
600
– – ﹤0.01% 969
2025
Q3 		$5.86K Hold
600
– – ﹤0.01% 936
2025
Q2 		$3.64K Hold
600
– – ﹤0.01% 897
2025
Q1 		$7.42K Sell
600
-200
-25% -$2.83K ﹤0.01% 883
2024
Q4 		$11.1K Buy
+800
New +$12.6K ﹤0.01% 832

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

HM Payson & Co's PRTA Position: Q2 2026 in Review

HM Payson & Co held its Prothena Corp (PRTA) position steady in Q2 2026 at 600 shares worth $5.87K. The position accounts for ﹤0.01% of the portfolio, ranked #970.

HM Payson & Co first reported a position in PRTA in Q4 2024 and has held it in 7 quarters since. The position peaked at $11.1K in Q4 2024. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • HM Payson & Co held 600 shares of Prothena Corp worth $5.87K as of Q2 2026.
  • HM Payson & Co left its Prothena Corp share count unchanged in Q2 2026.
  • Prothena Corp made up ﹤0.01% of HM Payson & Co's portfolio in Q2 2026, its #970 holding.
  • HM Payson & Co first reported a position in Prothena Corp in Q4 2024 and has held it in 7 quarters since.
  • HM Payson & Co's Prothena Corp position peaked at $11.1K in Q4 2024.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on HM Payson & Co's 13F filing for Q2 2026, filed 17 Jul 2026.