DEERFIELD MANAGEMENT COMPANY, L.P.
Position in SION — Sionna Therapeutics, Inc.
CIK 1009258
NEW YORK, NY
Position in SION
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$38,910,953
-$1,019,119 QoQ
Shares Held
970,590
0.0% QoQ
Ownership
2.15%
of shares outstanding
% of Portfolio
0.54%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2025
5 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in SION Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026DEERFIELD MANAGEMENT COMPANY, L.P. holds $5,090,522,306 across 44 Biotechnology names. SION ranks #29 (0.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | NUVL |
Nuvalent, Inc.
|
17,248,450 | $1,767,103,702 | |
| 2 | COGT |
Cogent Biosciences, Inc.
|
9,043,903 | $348,099,826 | |
| 3 | PRAX |
Praxis Precision Medicines, Inc.
|
963,351 | $310,382,058 | |
| 4 | RVMD |
Revolution Medicines, Inc.
|
2,297,000 | $223,383,250 | |
| 5 | CELC |
Celcuity Inc.
|
1,714,000 | $195,635,960 | |
| 6 | LRMR |
Larimar Therapeutics, Inc.
|
35,606,974 | $160,231,383 | |
| 7 | VERA |
Vera Therapeutics, Inc.
|
3,722,100 | $149,740,083 | |
| 8 | IONS |
Ionis Pharmaceuticals Inc
|
1,979,669 | $148,653,345 |
All Filings in SION
Export CSV
5 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $38,910,953 | 970,590 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $39,930,072 | 970,590 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $28,545,051 | 970,590 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $16,839,736 | 970,590 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $7,813,620 | 747,000 | Shares | Defined | 2025-05-15 | |
| No filing history on record for this holder in this stock. | ||||||