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ALLIANCEBERNSTEIN L.P.

Position in PRTA — Prothena Corp Public Ltd Co

CIK 1109448 NASHVILLE, TN

Position in PRTA

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$677,634
+$1,054 QoQ
Shares Held
69,217
-0.6% QoQ
Ownership
0.135%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#58
of 187 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in PRTA Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

ALLIANCEBERNSTEIN L.P. holds $5,177,847,011 across 257 Biotechnology names. PRTA ranks #153 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in PRTA

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $677,634 69,217
2026-03-31 $676,580 69,607
2025-12-31 $664,746 69,607
2025-09-30 $679,364 69,607
2025-06-30 $531,653 87,587
2025-03-31 $578,568 46,753
2024-12-31 $647,529 46,753
2024-09-30 $782,060 46,746
2024-06-30 $964,837 46,746
2024-03-31 $1,157,898 46,746
2023-12-31 $1,698,749 46,746
2023-09-30 $2,207,244 45,746
2023-06-30 $3,355,688 49,146
2023-03-31 $2,174,655 44,866
2022-12-31 $2,703,176 44,866
2022-09-30 $2,750,540 45,366
2022-06-30 $1,231,686 45,366
2022-03-31 $1,623,708 44,400
2021-12-31 $2,188,420 44,300
2021-09-30 $3,201,076 44,940
2021-06-30 $2,546,851 49,540
2021-03-31 $1,076,140 42,840
2020-12-31 $602,181 50,140
2020-09-30 $549,849 55,040
2020-06-30 $575,718 55,040
2020-03-31 $554,688 51,840