Vanguard Global Advisers
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Vanguard Global Advisers’s Prothena Corp PRTA Stock Holding History

Vanguard Global Advisers’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
Q3 		$143K Sell
17,017
-1,232
-7% -$11K ﹤0.01% 2618
2026
Q2 		$179K Hold
18,249
– – ﹤0.01% 2548
2026
Q1 		$177K Buy
+18,249
New +$167K ﹤0.01% 2490

Other funds holding PRTA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $85.7B AUM 51.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $71.4B AUM 33.43% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $73.4B AUM 32.8% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return

Vanguard Global Advisers's PRTA Position: Q3 2026 in Review

Vanguard Global Advisers reduced its Prothena Corp (PRTA) stake by 6.8% in Q3 2026, selling an estimated $11K and leaving 17,017 shares worth $143K. The position accounts for ﹤0.01% of the portfolio, ranked #2618.

Vanguard Global Advisers first reported a position in PRTA in Q1 2026 and has held it in 3 quarters since. The position peaked at $179K in Q2 2026. 130 funds tracked by Wall St. Rank hold PRTA as of Q3 2026.

  • Vanguard Global Advisers held 17,017 shares of Prothena Corp worth $143K as of Q3 2026.
  • Vanguard Global Advisers sold 1,232 Prothena Corp shares in Q3 2026, an estimated $11K.
  • Prothena Corp made up ﹤0.01% of Vanguard Global Advisers's portfolio in Q3 2026, its #2618 holding.
  • Vanguard Global Advisers first reported a position in Prothena Corp in Q1 2026 and has held it in 3 quarters since.
  • Vanguard Global Advisers's Prothena Corp position peaked at $179K in Q2 2026.
  • 130 funds tracked by Wall St. Rank held Prothena Corp as of Q3 2026.

Based on Vanguard Global Advisers's 13F filing for Q3 2026, filed 13 Nov 2026.