Position in IONS
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$1,718,152,929
+$127,268,481 QoQ
Shares Held
21,669,226
+2.3% QoQ
Ownership
13.0%
of shares outstanding
% of Portfolio
0.20%
of 13F equity value
Holder Rank
#2
of 510 holders
Holding Since
Jun 2023
13 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, 2026Capital World Investors holds $27,435,334,973 across 33 Biotechnology names. IONS ranks #4 (6.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
26,115,014 | $12,972,110,904 | |
| 2 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
11,144,846 | $3,354,932,991 | |
| 3 | ARGX |
Argenx SE
|
2,199,770 | $2,040,880,612 | |
| 4 | IONS |
Ionis Pharmaceuticals Inc
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|
21,669,226 | $1,718,152,929 | |
| 5 | MRNA |
Moderna, Inc.
|
22,276,996 | $1,560,058,029 | |
| 6 | RVMD |
Revolution Medicines, Inc.
|
4,008,244 | $750,663,936 | |
| 7 | JAZZ |
Jazz Pharmaceuticals plc
|
2,697,610 | $650,043,081 | |
| 8 | ONC |
BeOne Medicines Ltd.
|
2,249,582 | $641,063,382 |
All Filings in IONS
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13 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $1,718,152,929 | 21,669,226 | Shares | Defined | 2026-08-12 | |
| 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. | ||||||