DEERFIELD MANAGEMENT COMPANY, L.P.
Position in IONS — Ionis Pharmaceuticals Inc
CIK 1009258
NEW YORK, NY
Position in IONS
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$156,967,955
+$8,314,610 QoQ
Shares Held
1,979,669
0.0% QoQ
Ownership
1.19%
of shares outstanding
% of Portfolio
2.66%
of 13F equity value
Holder Rank
#19
of 510 holders
Holding Since
Sep 2025
4 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in IONS Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026DEERFIELD MANAGEMENT COMPANY, L.P. holds $3,763,549,987 across 45 Biotechnology names. IONS ranks #7 (4.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RVMD |
Revolution Medicines, Inc.
|
2,392,000 | $447,973,760 | |
| 2 | PRAX |
Praxis Precision Medicines, Inc.
|
963,351 | $322,520,281 | |
| 3 | LEGN |
Legend Biotech Corp
|
8,137,638 | $235,014,985 | |
| 4 | COGT |
Cogent Biosciences, Inc.
|
5,006,104 | $193,736,224 | |
| 5 | GMAB |
Genmab A/S
|
6,865,000 | $188,581,550 | |
| 6 | VERA |
Vera Therapeutics, Inc.
|
3,916,400 | $168,052,724 | |
| 7 | IONS |
Ionis Pharmaceuticals Inc
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|
1,979,669 | $156,967,955 | |
| 8 | CELC |
Celcuity Inc.
|
1,451,014 | $151,805,084 |
All Filings in IONS
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4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $156,967,955 | 1,979,669 | Shares | Defined | 2026-08-14 | |
| 2026-03-31 | $148,653,345 | 1,979,669 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $156,611,614 | 1,979,669 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $129,509,945 | 1,979,669 | Shares | Defined | 2025-11-14 | |
| No filing history on record for this holder in this stock. | ||||||