Position in ACLX
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$19,503,210
+$8,428,404 QoQ
Shares Held
169,859
0.0% QoQ
Ownership
0.290%
of shares outstanding
% of Portfolio
1.15%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2025
4 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ACLX Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026Rock Springs Capital Management LP holds $1,246,050,197 across 66 Biotechnology names. ACLX ranks #20 (1.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RVMD |
Revolution Medicines, Inc.
|
1,209,465 | $117,620,471 | |
| 2 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
170,999 | $89,512,846 | |
| 3 | MIRM |
Mirum Pharmaceuticals, Inc.
|
811,294 | $74,947,339 | |
| 4 | ARGX |
Argenx SE
|
98,500 | $71,929,625 | |
| 5 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
689,748 | $59,987,383 | |
| 6 | INSM |
INSMED Inc
|
314,300 | $51,394,336 | |
| 7 | ASND |
Ascendis Pharma A/S
|
194,000 | $44,373,620 | |
| 8 | XENE |
Xenon Pharmaceuticals Inc.
|
763,020 | $44,369,613 |
All Filings in ACLX
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $19,503,210 | 169,859 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $11,074,806 | 169,859 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $14,694,422 | 178,982 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $12,268,776 | 186,314 | Shares | Sole | 2025-08-14 | |
| No filing history on record for this holder in this stock. | ||||||