Artisan Partners Limited Partnership
Position in IONS — Ionis Pharmaceuticals Inc
CIK 1466153
Milwaukee, WI
Position in IONS
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$209,327,502
+$54,769,155 QoQ
Shares Held
2,640,024
+28.3% QoQ
Ownership
1.59%
of shares outstanding
% of Portfolio
0.34%
of 13F equity value
Holder Rank
#14
of 510 holders
Holding Since
Mar 2024
10 quarters on record
Voting authority
Sole 83%
Shared 0%
None 17%
Common Shares in IONS Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Artisan Partners Limited Partnership holds $3,449,495,070 across 23 Biotechnology names. IONS ranks #4 (6.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ARGX |
Argenx SE
|
1,508,778 | $1,399,798,965 | |
| 2 | ASND |
Ascendis Pharma A/S
|
2,634,024 | $702,546,881 | |
| 3 | INSM |
INSMED Inc
|
5,441,718 | $580,195,973 | |
| 4 | IONS |
Ionis Pharmaceuticals Inc
This page
|
2,640,024 | $209,327,502 | |
| 5 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
210,205 | $112,869,574 | |
| 6 | CELC |
Celcuity Inc.
|
461,591 | $48,291,650 | |
| 7 | LEGN |
Legend Biotech Corp
|
1,559,441 | $45,036,656 | |
| 8 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
354,816 | $39,395,220 |
All Filings in IONS
Export CSV
10 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $209,327,502 | 2,640,024 | Shares | Sole | 2026-08-13 | |
| 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. | ||||||