AMERICAN CENTURY COMPANIES INC
Position in IONS — Ionis Pharmaceuticals Inc
CIK 748054
KANSAS CITY, MO
Position in IONS
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$154,383,656
+$29,448,689 QoQ
Shares Held
1,947,076
+17.0% QoQ
Ownership
1.17%
of shares outstanding
% of Portfolio
0.07%
of 13F equity value
Holder Rank
#20
of 510 holders
Holding Since
Mar 2020
24 quarters on record
Voting authority
Sole 81%
Shared 19%
None 0%
Common Shares in IONS Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026AMERICAN CENTURY COMPANIES INC holds $3,568,637,643 across 178 Biotechnology names. IONS ranks #5 (4.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
1,853,956 | $558,096,374 | |
| 2 | ASND |
Ascendis Pharma A/S
|
1,400,575 | $373,561,364 | |
| 3 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
580,901 | $288,550,953 | |
| 4 | ARGX |
Argenx SE
|
173,193 | $160,683,269 | |
| 5 | IONS |
Ionis Pharmaceuticals Inc
This page
|
1,947,076 | $154,383,656 | |
| 6 | EXEL |
Exelixis, Inc.
|
1,791,664 | $97,484,438 | |
| 7 | HRMY |
Harmony Biosciences Holdings, Inc.
|
2,539,512 | $92,463,631 | |
| 8 | GPCR |
Structure Therapeutics Inc.
|
1,682,179 | $90,282,546 |
All Filings in IONS
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24 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $154,383,656 | 1,947,076 | Shares | Defined | 2026-08-12 | |
| 2026-03-31 | $124,934,967 | 1,663,803 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $127,929,255 | 1,617,106 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $89,770,959 | 1,372,225 | Shares | Defined | 2025-11-12 | |
| 2025-06-30 | $18,678,312 | 472,749 | Shares | Defined | 2025-08-12 | |
| 2025-03-31 | $3,522,890 | 116,768 | Shares | Defined | 2025-05-13 | |
| 2024-09-30 | $252,097 | 6,293 | Shares | Defined | 2024-11-12 | |
| 2024-06-30 | $640,598 | 13,441 | Shares | Defined | 2024-08-07 | |
| 2024-03-31 | $579,936 | 13,378 | Shares | Defined | 2024-05-14 | |
| 2023-12-31 | $668,597 | 13,216 | Shares | Defined | 2024-02-13 | |
| 2023-09-30 | $588,863 | 12,982 | Shares | Defined | 2023-11-13 | |
| 2023-06-30 | $517,265 | 12,607 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $470,445 | 13,163 | Shares | Defined | 2023-05-11 | |
| 2022-12-31 | $1,166,035 | 30,872 | Shares | Defined | 2023-02-13 | |
| 2022-09-30 | $445,794 | 10,079 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $272,282 | 7,355 | Shares | Defined | 2022-08-12 | |
| 2022-03-31 | $207,201 | 5,594 | Shares | Defined | 2022-05-11 | |
| 2021-09-30 | $6,686,064 | 199,346 | Shares | Defined | 2021-11-10 | |
| 2021-06-30 | $9,022,320 | 226,180 | Shares | Defined | 2021-08-05 | |
| 2021-03-31 | $42,382,802 | 942,678 | Shares | Defined | 2021-05-14 | |
| 2020-12-31 | $70,365,726 | 1,244,530 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 | $63,379,629 | 1,335,714 | Shares | Defined | 2020-11-13 | |
| 2020-06-30 | $85,367,122 | 1,447,882 | Shares | Defined | 2020-08-13 | |
| 2020-03-31 | $66,552,651 | 1,407,628 | Shares | Defined | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||