Position in ACLX
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$21,059,021
New position
Shares Held
183,409
first reported quarter
Ownership
0.314%
of shares outstanding
% of Portfolio
2.96%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2026
1 quarter on record
Voting authority
Sole 100%
Shared 0%
None 0%
Position in Biotechnology
Healthcare · as of Mar 31, 2026WATER ISLAND CAPITAL LLC holds $59,556,936 across 7 Biotechnology names. ACLX ranks #1 (35.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ACLX |
Arcellx, Inc.
This page
|
183,409 | $21,059,021 | |
| 2 | DAWN |
Day One Biopharmaceuticals, Inc.
|
944,247 | $20,244,655 | |
| 3 | TERN |
Terns Pharmaceuticals, Inc.
|
188,500 | $9,937,720 | |
| 4 | APLS |
Apellis Pharmaceuticals, Inc.
|
120,500 | $4,847,715 | |
| 5 | CNTA |
Centessa Pharmaceuticals plc
|
41,000 | $1,628,520 | |
| 6 | FOLD |
AMICUS THERAPEUTICS, INC.
|
104,066 | $1,504,794 | |
| 7 | VKTX |
Viking Therapeutics, Inc.
|
10,280 | $334,511 |
All Filings in ACLX
Export CSV
1 filing row on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $21,059,021 | 183,409 | Shares | Sole | 2026-05-15 | |
| No filing history on record for this holder in this stock. | ||||||