CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
PensionPosition in IONS — Ionis Pharmaceuticals Inc
CIK 1081019
WEST SACRAMENTO, CA
Position in IONS
as of Mar 31, 2026
· filed May 18, 2026
Position Value
$13,252,258
+$1,846,732 QoQ
Shares Held
176,485
+22.4% QoQ
Ownership
0.107%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 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, 2026CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $883,936,485 across 222 Biotechnology names. IONS ranks #9 (1.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
373,481 | $166,774,205 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
154,201 | $119,141,860 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
196,863 | $65,136,060 | |
| 4 | INSM |
INSMED Inc
|
303,182 | $49,576,320 | |
| 5 | RPRX |
Royalty Pharma plc
|
759,042 | $36,411,244 | |
| 6 | INCY |
Incyte Corp
|
241,287 | $22,709,932 | |
| 7 | MRNA |
Moderna, Inc.
|
407,190 | $20,685,252 | |
| 8 | RVMD |
Revolution Medicines, Inc.
|
165,277 | $16,073,188 |
All Filings in IONS
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $13,252,258 | 176,485 | Shares | Sole | 2026-05-18 | |
| 2025-12-31 | $11,405,526 | 144,173 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $9,493,227 | 145,112 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $5,733,059 | 145,104 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $3,989,620 | 132,238 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $4,681,213 | 133,902 | Shares | Sole | 2025-03-18 | |
| 2024-09-30 | $5,054,770 | 126,180 | Shares | Sole | 2025-04-04 | |
| 2024-06-30 | $6,158,434 | 129,216 | Shares | Sole | 2025-04-08 | |
| 2024-03-31 | $5,714,310 | 131,818 | Shares | Sole | 2024-05-16 | |
| 2023-12-31 | $7,008,333 | 138,532 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $6,603,599 | 145,582 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $6,605,747 | 160,998 | Shares | Sole | 2023-08-21 | |
| 2023-03-31 | $5,903,533 | 165,180 | Shares | Sole | 2023-05-09 | |
| 2022-12-31 | $6,340,638 | 167,875 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $7,338,862 | 165,925 | Shares | Sole | 2022-11-21 | |
| 2022-06-30 | $6,271,706 | 169,414 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $6,236,128 | 168,362 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $5,599,241 | 184,004 | Shares | Sole | 2022-02-15 | |
| 2021-09-30 | $7,579,738 | 225,991 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $9,722,070 | 243,722 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $11,018,931 | 245,083 | Shares | Sole | 2021-05-18 | |
| 2020-12-31 | $13,717,452 | 242,615 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $11,304,440 | 238,239 | Shares | Sole | 2020-11-17 | |
| 2020-06-30 | $14,362,597 | 243,599 | Shares | Sole | 2020-08-17 | |
| 2020-03-31 | $10,503,110 | 222,147 | Shares | Sole | 2020-05-13 | |
| No filing history on record for this holder in this stock. | ||||||