UBS AM’s Prothena Corp PRTA Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q2
$1.28K Hold
131
﹤0.01% 3593
2026
Q1
$1.27K Buy
+131
New +$1.2K ﹤0.01% 3657
2025
Q3
Sell
-139,284
Closed -$845K 2522
2025
Q2
$845K Sell
139,284
-242,368
-64% -$1.82M ﹤0.01% 2424
2025
Q1
$4.72M Buy
381,652
+144
+0% +$2.04K ﹤0.01% 1605
2024
Q4
$5.28M Sell
381,508
-145,240
-28% -$2.29M ﹤0.01% 1576
2024
Q3
$8.81M Buy
526,748
+483,673
+1,123% +$10.4M ﹤0.01% 1295
2024
Q2
$889K Sell
43,075
-332,090
-89% -$7.19M ﹤0.01% 2436
2024
Q1
$9.29M Buy
375,165
+83,298
+29% +$2.48M ﹤0.01% 1027
2023
Q4
$10.6M Buy
291,867
+25,820
+10% +$994K ﹤0.01% 960
2023
Q3
$12.8M Buy
266,047
+39,845
+18% +$2.37M 0.01% 875
2023
Q2
$11M Hold
226,202
0.01% 938
2023
Q1
$11M Sell
226,202
-2,166
-0.9% -$114K 0.01% 938
2022
Q4
$13.8M Sell
228,368
-14,642
-6% -$857K 0.01% 840
2022
Q3
$14.7M Hold
243,010
0.01% 840
2022
Q2
$6.6M Sell
243,010
-16,964
-7% -$496K ﹤0.01% 1114
2022
Q1
$9.51M Hold
259,974
﹤0.01% 1082
2021
Q4
$12.8M Sell
259,974
-19,849
-7% -$1.1M ﹤0.01% 1034
2021
Q3
$19.9M Sell
279,823
-122,345
-30% -$7.6M 0.01% 869
2021
Q2
$20.7M Buy
402,168
+49,641
+14% +$1.55M 0.01% 878
2021
Q1
$8.86M Buy
352,527
+316,420
+876% +$5.95M ﹤0.01% 1122
2020
Q4
$434K Hold
36,107
﹤0.01% 2335
2020
Q3
$361K Hold
36,107
﹤0.01% 2266
2020
Q2
$378K Sell
36,107
-6,258
-15% -$69.5K ﹤0.01% 2222
2020
Q1
$453K Sell
42,365
-11,048
-21% -$134K ﹤0.01% 2012
2019
Q4
$846K Buy
53,413
+19,146
+56% +$205K ﹤0.01% 1998
2019
Q3
$269K Buy
34,267
+3,452
+11% +$30.7K ﹤0.01% 2487
2019
Q2
$326K Buy
30,815
+3,495
+13% +$35.9K ﹤0.01% 2382
2019
Q1
$331K Buy
27,320
+12,320
+82% +$154K ﹤0.01% 2278
2018
Q4
$155K Hold
15,000
﹤0.01% 2464
2018
Q3
$196K Hold
15,000
﹤0.01% 2454
2018
Q2
$219K Buy
15,000
+14,952
+31,150% +$295K ﹤0.01% 2442
2018
Q1
$1.76K Hold
48
﹤0.01% 2635
2017
Q4
$1.8K Hold
48
﹤0.01% 2554
2017
Q3
$3.11K Hold
48
﹤0.01% 2494
2017
Q2
$2.6K Hold
48
﹤0.01% 2483
2017
Q1
$2.68K Hold
48
﹤0.01% 2430
2016
Q4
$2K Buy
+48
New +$2.65K ﹤0.01% 2449

Other funds holding PRTA

UBS AM's PRTA Position: Q2 2026 in Review

UBS AM held its Prothena Corp (PRTA) position steady in Q2 2026 at 131 shares worth $1.28K. The position accounts for ﹤0.01% of the portfolio, ranked #3593.

UBS AM first reported a position in PRTA in Q4 2016 and has held it in 37 quarters since. The position peaked at $20.7M in Q2 2021. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • UBS AM held 131 shares of Prothena Corp worth $1.28K as of Q2 2026.
  • UBS AM left its Prothena Corp share count unchanged in Q2 2026.
  • Prothena Corp made up ﹤0.01% of UBS AM's portfolio in Q2 2026, its #3593 holding.
  • UBS AM first reported a position in Prothena Corp in Q4 2016 and has held it in 37 quarters since.
  • UBS AM's Prothena Corp position peaked at $20.7M in Q2 2021.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

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