UBS Group
PRTA icon

UBS Group’s Prothena Corp PRTA Stock Holding History

UBS Group’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
2022
Q2 		– Sell
-40,000
Closed -$1.46M – 10784
2022
Q1 		$1.46M Buy
+40,000
New +$1.44M ﹤0.01% 3741
2015
Q3 		– Sell
-42,400
Closed -$2.23M – 8578
2015
Q2 		$2.23M Buy
+42,400
New +$1.67M ﹤0.01% 2864
2015
Q1 		– Sell
-500
Closed -$10K – 9238
2014
Q4 		$10K Buy
+500
New +$10.4K ﹤0.01% 8395

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

UBS Group's PRTA Position: Q2 2026 in Review

UBS Group reduced its Prothena Corp (PRTA) stake by 27% in Q2 2026, selling an estimated $860K and leaving 241,425 shares worth $2.36M. The position accounts for ﹤0.01% of the portfolio, ranked #4968.

UBS Group first reported a position in PRTA in Q4 2014 and has held it in 47 quarters since. The position peaked at $5.52M in Q3 2021. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • UBS Group held 241,425 shares of Prothena Corp worth $2.36M as of Q2 2026.
  • UBS Group sold 87,066 Prothena Corp shares in Q2 2026, an estimated $860K.
  • Prothena Corp made up ﹤0.01% of UBS Group's portfolio in Q2 2026, its #4968 holding.
  • UBS Group first reported a position in Prothena Corp in Q4 2014 and has held it in 47 quarters since.
  • UBS Group's Prothena Corp position peaked at $5.52M in Q3 2021.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on UBS Group's 13F filing for Q2 2026, filed 13 Aug 2026.