Artisan Partners Limited Partnership
Position in IONS — Ionis Pharmaceuticals Inc
CIK 1466153
Milwaukee, WI
Position in IONS
as of Mar 31, 2026
· filed May 13, 2026
Position Value
$154,558,347
+$61,096,528 QoQ
Shares Held
2,058,308
+74.2% QoQ
Ownership
1.25%
of shares outstanding
% of Portfolio
0.25%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2024
9 quarters on record
Voting authority
Sole 84.41598633440671.ToString("F0")%
Shared 0.ToString("F0")%
None 15.584013665593293.ToString("F0")%
Common Shares in IONS Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026Artisan Partners Limited Partnership holds $3,601,883,777 across 24 Biotechnology names. IONS ranks #4 (4.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ARGX |
Argenx SE
|
1,467,982 | $1,071,993,855 | |
| 2 | INSM |
INSMED Inc
|
6,527,301 | $1,067,344,259 | |
| 3 | ASND |
Ascendis Pharma A/S
|
3,230,188 | $738,840,901 | |
| 4 | IONS |
Ionis Pharmaceuticals Inc
This page
|
2,058,308 | $154,558,347 | |
| 5 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
183,540 | $96,077,683 | |
| 6 | CELC |
Celcuity Inc.
|
457,070 | $52,169,969 | |
| 7 | DBVT |
DBV Technologies S.A.
|
2,219,386 | $46,362,973 | |
| 8 | LEGN |
Legend Biotech Corp
|
2,254,488 | $40,783,687 |
All Filings in IONS
Export CSV
9 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $154,558,347 | 2,058,308 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $93,461,819 | 1,181,416 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $58,228,510 | 890,072 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $14,024,548 | 354,962 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $6,129,880 | 203,178 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $8,832,119 | 252,635 | Shares | Sole | 2025-02-12 | |
| 2024-09-30 | $89,752,627 | 2,240,455 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $79,641,575 | 1,671,036 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $18,065,202 | 416,729 | Shares | Sole | 2024-05-13 | |
| No filing history on record for this holder in this stock. | ||||||