Rafferty Asset Management, LLC
Position in PRTA — Prothena Corp Public Ltd Co
CIK 1389426
New York, NY
Position in PRTA
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$395,486
-$122,259 QoQ
Shares Held
40,397
-24.2% QoQ
Ownership
0.079%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#74
of 187 holders
Holding Since
Jun 2020
22 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, 2026Rafferty Asset Management, LLC holds $331,711,589 across 163 Biotechnology names. PRTA ranks #124 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
65,798 | $32,683,840 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
38,534 | $24,027,490 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
55,332 | $16,656,591 | |
| 4 | MRNA |
Moderna, Inc.
|
111,906 | $7,836,777 | |
| 5 | INCY |
Incyte Corp
|
44,663 | $5,062,997 | |
| 6 | APGE |
Apogee Therapeutics, Inc.
|
33,369 | $4,429,067 | |
| 7 | ORKA |
Oruka Therapeutics, Inc.
|
43,110 | $4,102,778 | |
| 8 | KYMR |
Kymera Therapeutics, Inc.
|
35,287 | $4,046,360 |
All Filings in PRTA
Export CSV
22 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $395,486 | 40,397 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $517,745 | 53,266 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $788,381 | 82,553 | Shares | Sole | 2026-02-13 | |
| 2025-03-31 | $544,227 | 43,978 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $1,075,757 | 77,672 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $1,041,107 | 62,230 | Shares | Sole | 2024-11-13 | |
| 2024-06-30 | $2,002,472 | 97,019 | Shares | Sole | 2024-08-13 | |
| 2024-03-31 | $7,516,580 | 303,455 | Shares | Sole | 2024-05-13 | |
| 2023-12-31 | $7,537,606 | 207,419 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $7,567,530 | 156,840 | Shares | Sole | 2023-11-13 | |
| 2023-06-30 | $8,164,785 | 119,578 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $6,867,665 | 141,689 | Shares | Sole | 2023-05-11 | |
| 2022-12-31 | $8,335,768 | 138,353 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $6,467,159 | 106,666 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $2,211,964 | 81,472 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $5,249,513 | 143,547 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $5,960,999 | 120,668 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $2,905,970 | 40,797 | Shares | Sole | 2021-11-10 | |
| 2021-06-30 | $1,756,988 | 34,176 | Shares | Sole | 2021-08-10 | |
| 2021-03-31 | $1,031,879 | 41,078 | Shares | Sole | 2021-05-10 | |
| 2020-09-30 | $229,959 | 23,019 | Shares | Sole | 2020-11-13 | |
| 2020-06-30 | $120,467 | 11,517 | Shares | Sole | 2020-08-07 | |
| No filing history on record for this holder in this stock. | ||||||