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David Shaw’s Prothena Corp PRTA Stock Holding History

David Shaw’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
2016
Q1 		– Sell
-36,600
Closed -$2.49M – 3704
2015
Q4 		$2.49M Hold
36,600
– – ﹤0.01% 1962
2015
Q3 		$1.66M Buy
+36,600
New +$2.13M ﹤0.01% 2227

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
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
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

David Shaw's PRTA Position: Q2 2026 in Review

David Shaw reduced its Prothena Corp (PRTA) stake by 8.6% in Q2 2026, selling an estimated $1.5M and leaving 1,611,457 shares worth $15.8M. The position accounts for 0.01% of the portfolio, ranked #1465.

David Shaw first reported a position in PRTA in Q2 2014 and has held it in 35 quarters since. The position peaked at $17.1M in Q1 2026. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • David Shaw held 1,611,457 shares of Prothena Corp worth $15.8M as of Q2 2026.
  • David Shaw sold 151,890 Prothena Corp shares in Q2 2026, an estimated $1.5M.
  • Prothena Corp made up 0.01% of David Shaw's portfolio in Q2 2026, its #1465 holding.
  • David Shaw first reported a position in Prothena Corp in Q2 2014 and has held it in 35 quarters since.
  • David Shaw's Prothena Corp position peaked at $17.1M in Q1 2026.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on D.E. Shaw & Co's 13F filing for Q2 2026, filed 14 Aug 2026.