HARBOR INVESTMENT ADVISORY, LLC
Position in PRTA — Prothena Corp Public Ltd Co
CIK 1468792
LUTHERVILLE, MD
Position in PRTA
as of Jun 30, 2026
· filed Jul 7, 2026
Position Value
$979
+$7 QoQ
Shares Held
100
0.0% QoQ
Ownership
0.000%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#168
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, 2026HARBOR INVESTMENT ADVISORY, LLC holds $5,602,456 across 30 Biotechnology names. PRTA ranks #28 (0.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | REGN |
Regeneron Pharmaceuticals, Inc.
|
2,382 | $1,485,272 | |
| 2 | ARGX |
Argenx SE
|
1,157 | $1,073,429 | |
| 3 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
1,399 | $694,925 | |
| 4 | TECH |
BIO-TECHNE Corp
|
9,300 | $657,045 | |
| 5 | BBIO |
BridgeBio Pharma, Inc.
|
1,835 | $136,670 | |
| 6 | CRSP |
CRISPR Therapeutics AG
|
2,300 | $125,442 | |
| 7 | HALO |
Halozyme Therapeutics, Inc.
|
1,494 | $116,935 | |
| 8 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
208 | $111,685 |
All Filings in PRTA
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $979 | 100 | Shares | Sole | 2026-07-07 | |
| 2026-03-31 | $972 | 100 | Shares | Sole | 2026-04-23 | |
| 2025-12-31 | $955 | 100 | Shares | Sole | 2026-01-07 | |
| 2025-09-30 | $976 | 100 | Shares | Sole | 2025-10-27 | |
| 2025-06-30 | $607 | 100 | Shares | Sole | 2025-07-01 | |
| 2025-03-31 | $1,237 | 100 | Shares | Sole | 2025-04-09 | |
| 2024-12-31 | $1,385 | 100 | Shares | Sole | 2025-01-16 | |
| 2024-09-30 | $1,673 | 100 | Shares | Sole | 2024-10-04 | |
| 2024-06-30 | $2,064 | 100 | Shares | Sole | 2024-07-19 | |
| 2024-03-31 | $2,477 | 100 | Shares | Sole | 2024-04-12 | |
| 2023-12-31 | $3,634 | 100 | Shares | Sole | 2024-01-26 | |
| 2023-09-30 | $4,825 | 100 | Shares | Sole | 2023-10-13 | |
| 2023-06-30 | $6,828 | 100 | Shares | Sole | 2023-07-14 | |
| 2023-03-31 | $4,847 | 100 | Shares | Sole | 2023-04-21 | |
| 2022-12-31 | $6,025 | 100 | Shares | Sole | 2023-01-24 | |
| 2022-09-30 | $6,063 | 100 | Shares | Sole | 2022-11-01 | |
| 2022-06-30 | $2,715 | 100 | Shares | Sole | 2022-07-18 | |
| 2022-03-31 | $3,657 | 100 | Shares | Sole | 2022-04-20 | |
| 2021-12-31 | $4,940 | 100 | Shares | Sole | 2022-01-10 | |
| 2021-09-30 | $7,123 | 100 | Shares | Sole | 2021-10-12 | |
| 2021-06-30 | $5,141 | 100 | Shares | Sole | 2021-07-27 | |
| 2021-03-31 | $2,512 | 100 | Shares | Sole | 2021-04-16 | |
| 2020-12-31 | $1,201 | 100 | Shares | Sole | 2021-02-04 | |
| 2020-09-30 | $999 | 100 | Shares | Sole | 2020-10-23 | |
| 2020-06-30 | $1,046 | 100 | Shares | Sole | 2020-07-16 | |
| 2020-03-31 | $1,070 | 100 | Shares | Sole | 2020-05-11 | |
| No filing history on record for this holder in this stock. | ||||||