T. Rowe Price Investment Management, Inc.
Position in IONS — Ionis Pharmaceuticals Inc
CIK 1897612
BALTIMORE, MD
Position in IONS
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$313,938,605
-$148,542,732 QoQ
Shares Held
3,959,372
-35.7% QoQ
Ownership
2.38%
of shares outstanding
% of Portfolio
0.21%
of 13F equity value
Holder Rank
#10
of 514 holders
Holding Since
Sep 2022
16 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, 2026T. Rowe Price Investment Management, Inc. holds $12,305,680,119 across 52 Biotechnology names. IONS ranks #12 (2.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ASND |
Ascendis Pharma A/S
|
6,754,846 | $1,801,652,525 | |
| 2 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
5,642,173 | $1,698,463,338 | |
| 3 | CYTK |
Cytokinetics Inc
|
18,718,498 | $1,594,628,844 | |
| 4 | KYMR |
Kymera Therapeutics, Inc.
|
6,257,261 | $717,520,118 | |
| 5 | PCVX |
Vaxcyte, Inc.
|
12,207,450 | $709,619,068 | |
| 6 | DYN |
Dyne Therapeutics, Inc.
|
30,912,287 | $686,561,894 | |
| 7 | CGON |
CG Oncology, Inc.
|
6,616,899 | $470,130,673 | |
| 8 | IMNM |
Immunome Inc.
|
19,676,883 | $416,953,150 |
All Filings in IONS
Export CSV
16 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $313,938,605 | 3,959,372 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $462,481,337 | 6,159,027 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $458,036,061 | 5,789,863 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $860,726,295 | 13,156,929 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $634,084,966 | 16,048,721 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $488,015,830 | 16,175,533 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $495,355,197 | 14,169,199 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $567,574,726 | 14,168,116 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $602,407,339 | 12,639,684 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $577,296,805 | 13,317,112 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $667,861,507 | 13,201,453 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $595,261,774 | 13,123,055 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $536,825,318 | 13,083,727 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $466,909,039 | 13,064,047 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $441,087,842 | 11,678,259 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $493,460,619 | 11,156,695 | Shares | Sole | 2022-11-14 | |
| No filing history on record for this holder in this stock. | ||||||