Position in CPRX
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$0
New position
Shares Held
933,819
first reported quarter
Ownership
0.763%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2026
1 quarter on record
Voting authority
Sole 100%
Shared 0%
None 0%
Position in Biotechnology
Healthcare · as of Jun 30, 2026WATER ISLAND CAPITAL LLC holds $37,326,339 across 7 Biotechnology names. CPRX ranks #5 (0.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | TECH |
BIO-TECHNE Corp
|
335,727 | $23,719,112 | |
| 2 | APGE |
Apogee Therapeutics, Inc.
|
94,900 | $12,596,077 | |
| 3 | VKTX |
Viking Therapeutics, Inc.
|
15,000 | $585,150 | |
| 4 | AURA |
Aura Biosciences, Inc.
|
60,000 | $426,000 | |
| 5 | CPRX |
Catalyst Pharmaceuticals, Inc.
This page
|
933,819 | $0 | |
| 6 | XOMA |
XOMA Royalty Corp
|
242,000 | $0 | |
| 7 | NUVL |
Nuvalent, Inc.
|
103,979 | $0 |
All Filings in CPRX
Export CSV
1 filing row on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | — | 933,819 | Shares | Sole | 2026-08-14 | |
| No filing history on record for this holder in this stock. | ||||||