D.E. Shaw & Co
PRTA icon

D.E. Shaw & Co’s Prothena Corp PRTA Stock Holding History

D.E. Shaw & 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
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 $1.9T AUM 41.92% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

D.E. Shaw & Co's PRTA Position: Q1 2026 in Review

D.E. Shaw & Co increased its Prothena Corp (PRTA) stake by 4.9% in Q1 2026, buying an estimated $751K and bringing the position to 1,763,347 shares worth $17.1M. The position accounts for 0.01% of the portfolio, ranked #1252.

D.E. Shaw & Co first reported a position in PRTA in Q2 2014 and has held it in 34 quarters since. 185 funds tracked by Wall St. Rank hold PRTA as of Q1 2026.

  • D.E. Shaw & Co held 1,763,347 shares of Prothena Corp worth $17.1M as of Q1 2026.
  • D.E. Shaw & Co bought 81,978 Prothena Corp shares in Q1 2026, an estimated $751K.
  • Prothena Corp made up 0.01% of D.E. Shaw & Co's portfolio in Q1 2026, its #1252 holding.
  • D.E. Shaw & Co first reported a position in Prothena Corp in Q2 2014 and has held it in 34 quarters since.
  • 185 funds tracked by Wall St. Rank held Prothena Corp as of Q1 2026.

Based on D.E. Shaw & Co's 13F filing for Q1 2026, filed 15 May 2026.