Cornerstone Financial Management LLC
Position in PRTA — Prothena Corp Public Ltd Co
CIK 2110329
PROVIDENCE, RI
Position in PRTA
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$538
+$4 QoQ
Shares Held
55
0.0% QoQ
Ownership
0.000%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#172
of 187 holders
Holding Since
Mar 2026
2 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, 2026Cornerstone Financial Management LLC holds $250,591 across 58 Biotechnology names. PRTA ranks #53 (0.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
209 | $103,816 | |
| 2 | RVMD |
Revolution Medicines, Inc.
|
174 | $32,586 | |
| 3 | ARGX |
Argenx SE
|
12 | $11,133 | |
| 4 | REGN |
Regeneron Pharmaceuticals, Inc.
|
14 | $8,729 | |
| 5 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
26 | $7,826 | |
| 6 | JAZZ |
Jazz Pharmaceuticals plc
|
27 | $6,506 | |
| 7 | ERAS |
Erasca, Inc.
|
338 | $6,192 | |
| 8 | KRYS |
Krystal Biotech, Inc.
|
14 | $5,203 |
All Filings in PRTA
Export CSV
2 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $538 | 55 | Shares | Sole | 2026-08-12 | |
| 2026-03-31 | $534 | 55 | Shares | Sole | 2026-05-08 | |
| No filing history on record for this holder in this stock. | ||||||