Rock Springs Capital Management LP
Position in CLDX — Celldex Therapeutics, Inc.
CIK 1595725
Baltimore, MD
Position in CLDX
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$26,015,222
+$5,388,658 QoQ
Shares Held
699,146
+7.5% QoQ
Ownership
0.890%
of shares outstanding
% of Portfolio
1.27%
of 13F equity value
Holder Rank
#31
of 252 holders
Holding Since
Mar 2022
18 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CLDX Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Rock Springs Capital Management LP holds $1,502,002,537 across 70 Biotechnology names. CLDX ranks #14 (1.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RVMD |
Revolution Medicines, Inc.
|
1,105,210 | $206,983,728 | |
| 2 | TVTX |
Travere Therapeutics, Inc.
|
2,179,069 | $123,792,909 | |
| 3 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
174,999 | $93,965,713 | |
| 4 | MIRM |
Mirum Pharmaceuticals, Inc.
|
798,145 | $93,438,835 | |
| 5 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
692,598 | $76,899,155 | |
| 6 | KYMR |
Kymera Therapeutics, Inc.
|
453,156 | $51,963,398 | |
| 7 | ARGX |
Argenx SE
|
52,750 | $48,939,867 | |
| 8 | ASND |
Ascendis Pharma A/S
|
168,750 | $45,009,000 |
All Filings in CLDX
Export CSV
18 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $26,015,222 | 699,146 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $20,626,564 | 650,270 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $18,809,332 | 692,538 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $18,666,188 | 721,538 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $16,537,488 | 812,653 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $14,749,651 | 812,653 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $30,884,539 | 1,222,182 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $37,517,414 | 1,103,778 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $51,776,767 | 1,398,994 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $57,590,604 | 1,372,185 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $38,456,160 | 969,646 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $13,762,779 | 500,101 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $14,305,396 | 421,615 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $15,165,713 | 421,504 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $18,786,433 | 421,504 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $11,851,288 | 421,604 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $9,044,459 | 335,477 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $3,314,617 | 97,317 | Shares | Sole | 2022-05-16 | |
| No filing history on record for this holder in this stock. | ||||||