Barclays
PRTA icon

Barclays’s Prothena Corp PRTA Stock Holding History

Barclays’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
2020
Q2 		– Sell
-89,400
Closed -$956K – 6108
2020
Q1 		$956K Sell
89,400
-600
-0.7% -$7.27K ﹤0.01% 3002
2019
Q4 		$1.42M Buy
90,000
+88,900
+8,082% +$953K ﹤0.01% 3337
2019
Q3 		$9K Sell
1,100
-5,600
-84% -$49.7K ﹤0.01% 6374
2019
Q2 		$71K Buy
6,700
+3,100
+86% +$31.8K ﹤0.01% 5918
2019
Q1 		$44K Sell
3,600
-15,600
-81% -$195K ﹤0.01% 5970
2018
Q4 		$198K Sell
19,200
-6,200
-24% -$73.7K ﹤0.01% 4581
2018
Q3 		$332K Buy
25,400
+10,700
+73% +$155K ﹤0.01% 4602
2018
Q2 		$214K Sell
14,700
-408,700
-97% -$8.07M ﹤0.01% 4663
2018
Q1 		$15.5M Buy
423,400
+403,500
+2,028% +$14.7M 0.01% 972
2017
Q4 		$746K Buy
+19,900
New +$1.01M ﹤0.01% 3412
2017
Q1 		– Sell
-1,200
Closed -$59K – 6927
2016
Q4 		$59K Buy
+1,200
New +$66.2K ﹤0.01% 5061
2015
Q1 		– Sell
-90
Closed -$2K – 7216
2014
Q4 		$2K Hold
90
– – ﹤0.01% 7120
2014
Q3 		$2K Hold
90
– – ﹤0.01% 7413
2014
Q2 		$2K Hold
90
– – ﹤0.01% 7405
2014
Q1 		$3K Sell
90
-218
-71% -$7.03K ﹤0.01% 7337
2013
Q4 		$8K Buy
+308
New +$7.72K ﹤0.01% 7063
2013
Q3 		– Sell
-322
Closed -$4K – 7563
2013
Q2 		$4K Buy
+322
New +$3K ﹤0.01% 7410

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
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 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

Barclays's PRTA Position: Q1 2026 in Review

Barclays reduced its Prothena Corp (PRTA) stake by 78% in Q1 2026, selling an estimated $1.31M and leaving 40,862 shares worth $397K. The position accounts for ﹤0.01% of the portfolio, ranked #3316.

Barclays first reported a position in PRTA in Q2 2013 and has held it in 51 quarters since. The position peaked at $5.18M in Q4 2023. 185 funds tracked by Wall St. Rank hold PRTA as of Q1 2026.

  • Barclays held 40,862 shares of Prothena Corp worth $397K as of Q1 2026.
  • Barclays sold 142,763 Prothena Corp shares in Q1 2026, an estimated $1.31M.
  • Prothena Corp made up ﹤0.01% of Barclays's portfolio in Q1 2026, its #3316 holding.
  • Barclays first reported a position in Prothena Corp in Q2 2013 and has held it in 51 quarters since.
  • Barclays's Prothena Corp position peaked at $5.18M in Q4 2023.
  • 185 funds tracked by Wall St. Rank held Prothena Corp as of Q1 2026.

Based on Barclays's 13F filing for Q1 2026, filed 15 May 2026.