Position in IONS
as of Mar 31, 2026
· filed May 13, 2026
Position Value
$1,590,884,448
+$169,966,085 QoQ
Shares Held
21,186,369
+18.0% QoQ
Ownership
12.8%
of shares outstanding
% of Portfolio
0.22%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2023
12 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in IONS Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026Capital World Investors holds $23,534,298,325 across 32 Biotechnology names. IONS ranks #4 (6.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
25,368,124 | $11,327,882,090 | |
| 2 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
10,802,348 | $3,574,172,882 | |
| 3 | ARGX |
Argenx SE
|
2,256,216 | $1,647,601,734 | |
| 4 | IONS |
Ionis Pharmaceuticals Inc
This page
|
21,186,369 | $1,590,884,448 | |
| 5 | REGN |
Regeneron Pharmaceuticals, Inc.
|
1,419,000 | $1,096,376,160 | |
| 6 | MRNA |
Moderna, Inc.
|
18,697,694 | $949,842,855 | |
| 7 | JAZZ |
Jazz Pharmaceuticals plc
|
2,673,376 | $505,401,732 | |
| 8 | ONC |
BeOne Medicines Ltd.
|
1,622,687 | $481,889,358 |
All Filings in IONS
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12 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $1,590,884,448 | 21,186,369 | Shares | Defined | 2026-05-13 | |
| 2025-12-31 | $1,420,918,363 | 17,961,299 | Shares | Defined | 2026-02-11 | |
| 2025-09-30 | $832,320,865 | 12,722,728 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $495,462,827 | 12,540,188 | Shares | Defined | 2025-08-13 | |
| 2025-03-31 | $372,961,358 | 12,361,994 | Shares | Defined | 2025-05-12 | |
| 2024-12-31 | $400,830,838 | 11,465,413 | Shares | Defined | 2025-02-13 | |
| 2024-09-30 | $313,604,582 | 7,828,372 | Shares | Defined | 2024-11-13 | |
| 2024-06-30 | $107,334,561 | 2,252,089 | Shares | Defined | 2024-08-13 | |
| 2024-03-31 | $36,390,721 | 839,463 | Shares | Defined | 2024-05-14 | |
| 2023-12-31 | $42,468,433 | 839,463 | Shares | Defined | 2024-02-13 | |
| 2023-09-30 | $38,078,041 | 839,463 | Shares | Defined | 2023-11-13 | |
| 2023-06-30 | $34,443,166 | 839,463 | Shares | Defined | 2023-08-11 | |
| No filing history on record for this holder in this stock. | ||||||