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Ballentine Partners’s Prothena Corp PRTA Stock Holding History

Ballentine Partners’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 		$164K Hold
16,793
– – ﹤0.01% 1022
2026
Q1 		$163K Sell
16,793
-1,277
-7% -$11.7K ﹤0.01% 959
2025
Q4 		$173K Sell
18,070
-240
-1% -$2.44K ﹤0.01% 935
2025
Q3 		$179K Buy
+18,310
New +$141K ﹤0.01% 938

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

Ballentine Partners's PRTA Position: Q2 2026 in Review

Ballentine Partners held its Prothena Corp (PRTA) position steady in Q2 2026 at 16,793 shares worth $164K. The position accounts for ﹤0.01% of the portfolio, ranked #1022.

Ballentine Partners first reported a position in PRTA in Q3 2025 and has held it in 4 quarters since. The position peaked at $179K in Q3 2025. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Ballentine Partners held 16,793 shares of Prothena Corp worth $164K as of Q2 2026.
  • Ballentine Partners left its Prothena Corp share count unchanged in Q2 2026.
  • Prothena Corp made up ﹤0.01% of Ballentine Partners's portfolio in Q2 2026, its #1022 holding.
  • Ballentine Partners first reported a position in Prothena Corp in Q3 2025 and has held it in 4 quarters since.
  • Ballentine Partners's Prothena Corp position peaked at $179K in Q3 2025.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Ballentine Partners's 13F filing for Q2 2026, filed 17 Jul 2026.