Position in IONS
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$153,763,820
+$12,011,279 QoQ
Shares Held
2,047,727
+14.3% QoQ
Ownership
1.24%
of shares outstanding
% of Portfolio
0.89%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2024
6 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, 2026BAKER BROS. ADVISORS LP holds $16,600,149,582 across 76 Biotechnology names. IONS ranks #14 (0.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | INCY |
Incyte Corp
|
30,744,412 | $2,893,664,057 | |
| 2 | ONC |
BeOne Medicines Ltd.
|
8,799,053 | $2,613,054,769 | |
| 3 | INSM |
INSMED Inc
|
7,421,111 | $1,213,500,070 | |
| 4 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
2,141,701 | $1,121,116,222 | |
| 5 | ACAD |
Acadia Pharmaceuticals Inc
|
42,896,690 | $954,880,319 | |
| 6 | RVMD |
Revolution Medicines, Inc.
|
9,555,357 | $929,258,468 | |
| 7 | CELC |
Celcuity Inc.
|
7,915,792 | $903,508,498 | |
| 8 | KOD |
Kodiak Sciences Inc.
|
19,919,186 | $759,319,370 |
All Filings in IONS
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6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $153,763,820 | 2,047,727 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $141,752,541 | 1,791,841 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $37,079,925 | 566,798 | Shares | Sole | 2025-11-14 | |
| 2025-03-31 | $10,798,295 | 357,915 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $12,512,708 | 357,915 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $8,952,208 | 223,470 | Shares | Sole | 2024-11-14 | |
| No filing history on record for this holder in this stock. | ||||||