Russell Investments Group, Ltd.
Position in PRTA — Prothena Corp Public Ltd Co
CIK 1692234
Seattle, WA
Position in PRTA
as of Jun 30, 2026
· filed Aug 6, 2026
Position Value
$1,193,407
+$215,317 QoQ
Shares Held
121,901
+21.1% QoQ
Ownership
0.237%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#44
of 187 holders
Holding Since
Mar 2020
18 quarters on record
Voting authority
Sole 80%
Shared 0%
None 20%
Common Shares in PRTA Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Russell Investments Group, Ltd. holds $1,494,413,888 across 308 Biotechnology names. PRTA ranks #112 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
336,990 | $167,393,033 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
230,151 | $143,508,345 | |
| 3 | RPRX |
Royalty Pharma plc
|
1,694,250 | $94,996,587 | |
| 4 | INCY |
Incyte Corp
|
425,616 | $48,247,822 | |
| 5 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
158,228 | $47,631,369 | |
| 6 | BMRN |
Biomarin Pharmaceutical Inc
|
783,148 | $44,811,725 | |
| 7 | LGND |
Ligand Pharmaceuticals Inc
|
120,304 | $38,026,888 | |
| 8 | PTCT |
Ptc Therapeutics, Inc.
|
418,025 | $34,098,295 |
All Filings in PRTA
Export CSV
18 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $1,193,407 | 121,901 | Shares | Defined | 2026-08-06 | |
| 2026-03-31 | $978,090 | 100,627 | Shares | Other | 2026-05-08 | |
| 2025-12-31 | $948,789 | 99,350 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $1,246,905 | 127,757 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $583,908 | 96,196 | Shares | Defined | 2025-08-13 | |
| 2025-03-31 | $14,775 | 1,194 | Shares | Defined | 2025-05-13 | |
| 2024-12-31 | $12,201 | 881 | Shares | Defined | 2025-02-13 | |
| 2024-09-30 | $16,646 | 995 | Shares | Defined | 2024-11-13 | |
| 2024-06-30 | $36,140 | 1,751 | Shares | Defined | 2024-08-08 | |
| 2024-03-31 | $3,220 | 130 | Shares | Defined | 2024-05-08 | |
| 2023-12-31 | $13,880 | 382 | Shares | Defined | 2024-02-05 | |
| 2021-12-31 | $1,171,323 | 23,711 | Shares | Sole | 2022-01-21 | |
| 2021-09-30 | $249,020 | 3,496 | Shares | Sole | 2021-11-08 | |
| 2021-03-31 | $1,635,787 | 65,119 | Shares | Sole | 2021-05-10 | |
| 2020-12-31 | $1,112,798 | 92,656 | Shares | Sole | 2021-02-08 | |
| 2020-09-30 | $961,966 | 96,293 | Shares | Defined | 2020-11-09 | |
| 2020-06-30 | $1,168,735 | 111,734 | Shares | Defined | 2020-08-05 | |
| 2020-03-31 | $1,000,642 | 93,518 | Shares | Sole | 2020-05-06 | |
| No filing history on record for this holder in this stock. | ||||||