Vanguard Group’s Prothena Corp PRTA Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2025
Q4
$20.4M Buy
2,140,909
+91,060
+4% +$927K ﹤0.01% 2608
2025
Q3
$20M Sell
2,049,849
-126,378
-6% -$971K ﹤0.01% 2626
2025
Q2
$13.2M Buy
2,176,227
+906,956
+71% +$6.81M ﹤0.01% 2756
2025
Q1
$15.7M Sell
1,269,271
-134,567
-10% -$1.9M ﹤0.01% 2618
2024
Q4
$19.4M Buy
1,403,838
+144,737
+11% +$2.28M ﹤0.01% 2602
2024
Q3
$21.1M Buy
1,259,101
+87,354
+7% +$1.88M ﹤0.01% 2572
2024
Q2
$24.2M Buy
1,171,747
+46,464
+4% +$1.01M ﹤0.01% 2470
2024
Q1
$27.9M Buy
1,125,283
+54,728
+5% +$1.63M ﹤0.01% 2431
2023
Q4
$38.9M Buy
1,070,555
+39,781
+4% +$1.53M ﹤0.01% 2289
2023
Q3
$49.7M Sell
1,030,774
-9,907
-1% -$589K ﹤0.01% 2141
2023
Q2
$71.1M Buy
1,040,681
+96,125
+10% +$6.2M ﹤0.01% 2036
2023
Q1
$45.8M Buy
944,556
+74,422
+9% +$3.93M ﹤0.01% 2214
2022
Q4
$52.4M Buy
870,134
+62,174
+8% +$3.64M ﹤0.01% 2162
2022
Q3
$49M Sell
807,960
-21,116
-3% -$668K ﹤0.01% 2197
2022
Q2
$22.5M Sell
829,076
-46,224
-5% -$1.35M ﹤0.01% 2582
2022
Q1
$32M Sell
875,300
-25,904
-3% -$934K ﹤0.01% 2537
2021
Q4
$44.5M Buy
901,204
+32,726
+4% +$1.81M ﹤0.01% 2414
2021
Q3
$61.9M Buy
868,478
+187,382
+28% +$11.6M ﹤0.01% 2240
2021
Q2
$35M Buy
681,096
+109,420
+19% +$3.41M ﹤0.01% 2556
2021
Q1
$14.4M Sell
571,676
-32,135
-5% -$605K ﹤0.01% 2958
2020
Q4
$7.25M Buy
603,811
+29,664
+5% +$351K ﹤0.01% 3161
2020
Q3
$5.74M Sell
574,147
-199,075
-26% -$2.39M ﹤0.01% 3083
2020
Q2
$8.09M Sell
773,222
-19,031
-2% -$211K ﹤0.01% 2870
2020
Q1
$8.48M Buy
792,253
+23,756
+3% +$288K ﹤0.01% 2694
2019
Q4
$12.2M Sell
768,497
-83,762
-10% -$898K ﹤0.01% 2765
2019
Q3
$6.68M Buy
852,259
+38,883
+5% +$345K ﹤0.01% 3025
2019
Q2
$8.6M Buy
813,376
+5,817
+0.7% +$59.7K ﹤0.01% 2947
2019
Q1
$9.8M Buy
807,559
+113,902
+16% +$1.42M ﹤0.01% 2835
2018
Q4
$7.14M Sell
693,657
-74,778
-10% -$889K ﹤0.01% 2932
2018
Q3
$10.1M Sell
768,435
-296,580
-28% -$4.28M ﹤0.01% 2916
2018
Q2
$15.5M Buy
1,065,015
+316,411
+42% +$6.25M ﹤0.01% 2687
2018
Q1
$27.5M Buy
748,604
+9,935
+1% +$361K ﹤0.01% 2368
2017
Q4
$27.7M Buy
738,669
+6,471
+0.9% +$329K ﹤0.01% 2357
2017
Q3
$47.4M Buy
732,198
+19,114
+3% +$1.17M ﹤0.01% 2069
2017
Q2
$38.6M Buy
713,084
+13,226
+2% +$705K ﹤0.01% 2148
2017
Q1
$39M Buy
699,858
+97,631
+16% +$5.13M ﹤0.01% 2123
2016
Q4
$29.6M Buy
602,227
+10,348
+2% +$571K ﹤0.01% 2226
2016
Q3
$35.5M Buy
591,879
+8,073
+1% +$433K ﹤0.01% 2090
2016
Q2
$20.4M Buy
583,806
+15,722
+3% +$685K ﹤0.01% 2325
2016
Q1
$23.4M Buy
568,084
+48,050
+9% +$1.88M ﹤0.01% 2231
2015
Q4
$35.4M Buy
520,034
+10,642
+2% +$642K ﹤0.01% 2040
2015
Q3
$23.1M Buy
509,392
+48,909
+11% +$2.85M ﹤0.01% 2223
2015
Q2
$24.3M Buy
460,483
+66,838
+17% +$2.64M ﹤0.01% 2270
2015
Q1
$15M Buy
393,645
+18,392
+5% +$472K ﹤0.01% 2453
2014
Q4
$7.79M Sell
375,253
-26,973
-7% -$563K ﹤0.01% 2656
2014
Q3
$8.91M Buy
402,226
+45,110
+13% +$956K ﹤0.01% 2546
2014
Q2
$8.05M Buy
357,116
+114,459
+47% +$2.86M ﹤0.01% 2606
2014
Q1
$9.3M Buy
242,657
+74,387
+44% +$2.4M ﹤0.01% 2530
2013
Q4
$4.46M Buy
168,270
+49,036
+41% +$1.23M ﹤0.01% 2862
2013
Q3
$2.41M Buy
119,234
+90,974
+322% +$1.61M ﹤0.01% 3062
2013
Q2
$365K Buy
+28,260
New +$263K ﹤0.01% 3547

Other funds holding PRTA

Vanguard Group's PRTA Position: Q4 2025 in Review

Vanguard Group increased its Prothena Corp (PRTA) stake by 4.4% in Q4 2025, buying an estimated $927K and bringing the position to 2,140,909 shares worth $20.4M. The position accounts for ﹤0.01% of the portfolio, ranked #2608.

Vanguard Group first reported a position in PRTA in Q2 2013 and has held it in 51 quarters since. The position peaked at $71.1M in Q2 2023. 181 funds tracked by Wall St. Rank hold PRTA as of Q4 2025.

  • Vanguard Group held 2,140,909 shares of Prothena Corp worth $20.4M as of Q4 2025.
  • Vanguard Group bought 91,060 Prothena Corp shares in Q4 2025, an estimated $927K.
  • Prothena Corp made up ﹤0.01% of Vanguard Group's portfolio in Q4 2025, its #2608 holding.
  • Vanguard Group first reported a position in Prothena Corp in Q2 2013 and has held it in 51 quarters since.
  • Vanguard Group's Prothena Corp position peaked at $71.1M in Q2 2023.
  • 181 funds tracked by Wall St. Rank held Prothena Corp as of Q4 2025.

Based on Vanguard Group's 13F filing for Q4 2025, filed 29 Jan 2026.