Tower Research Capital LLC (TRC)
Position in PRTA — Prothena Corp Public Ltd Co
CIK 1533421
NEW YORK, NY
Position in PRTA
as of Jun 30, 2026
· filed Aug 11, 2026
Position Value
$46,385
+$1,314 QoQ
Shares Held
4,738
+2.2% QoQ
Ownership
0.009%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#129
of 187 holders
Holding Since
Jun 2020
25 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, 2026Tower Research Capital LLC (TRC) holds $49,473,308 across 466 Biotechnology names. PRTA ranks #145 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ARGX |
Argenx SE
|
4,547 | $4,218,570 | |
| 2 | BBIO |
BridgeBio Pharma, Inc.
|
38,206 | $2,845,582 | |
| 3 | ARWR |
Arrowhead Pharmaceuticals, Inc.
|
34,537 | $2,815,110 | |
| 4 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
4,292 | $2,131,964 | |
| 5 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
3,927 | $2,108,602 | |
| 6 | AXSM |
Axsome Therapeutics, Inc.
|
6,437 | $1,575,584 | |
| 7 | INSM |
INSMED Inc
|
10,927 | $1,165,036 | |
| 8 | ROIV |
Roivant Sciences Ltd.
|
32,746 | $1,158,880 |
All Filings in PRTA
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $46,385 | 4,738 | Shares | Defined | 2026-08-11 | |
| 2026-03-31 | $45,071 | 4,637 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $26,988 | 2,826 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $12,541 | 1,285 | Shares | Other | 2025-11-14 | |
| 2025-06-30 | $77,143 | 12,709 | Shares | Defined | 2025-08-15 | |
| 2025-03-31 | $23,437 | 1,894 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $233,040 | 16,826 | Shares | Other | 2025-02-13 | |
| 2024-09-30 | $91,295 | 5,457 | Shares | Other | 2024-11-14 | |
| 2024-06-30 | $144,273 | 6,990 | Shares | Defined | 2024-08-13 | |
| 2024-03-31 | $14,465 | 584 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $182,390 | 5,019 | Shares | Defined | 2024-02-13 | |
| 2023-09-30 | $67,453 | 1,398 | Shares | Other | 2023-11-14 | |
| 2023-06-30 | $173,089 | 2,535 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $86,616 | 1,803 | Shares | Other | 2023-05-09 | |
| 2022-12-31 | $93,146 | 1,546 | Shares | Other | 2023-02-10 | |
| 2022-09-30 | $504,016 | 8,313 | Shares | Other | 2022-11-10 | |
| 2022-06-30 | $137,270 | 5,056 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $300,714 | 8,223 | Shares | Other | 2022-05-12 | |
| 2021-12-31 | $167,762 | 3,396 | Shares | Other | 2022-02-14 | |
| 2021-09-30 | $378,800 | 5,318 | Shares | Other | 2021-11-15 | |
| 2021-06-30 | $106,315 | 2,068 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $48,431 | 1,928 | Shares | Defined | 2021-05-17 | |
| 2020-12-31 | $40,605 | 3,381 | Shares | Defined | 2021-02-16 | |
| 2020-09-30 | $125,454 | 12,558 | Shares | Other | 2020-11-16 | |
| 2020-06-30 | $96,220 | 9,199 | Shares | Other | 2020-08-13 | |
| No filing history on record for this holder in this stock. | ||||||