CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
Holdings in BIIB
Position Over Time
| Report Date | Value (USD) | Shares | Type | Discretion | Filed |
|---|---|---|---|---|---|
| 2025-12-31 | $39,840,616 | 226,380 | Shares | Sole | 2026-02-17 |
| 2025-09-30 | $32,893,305 | 234,818 | Shares | Sole | 2025-11-14 |
| 2025-06-30 | $29,977,202 | 238,691 | Shares | Sole | 2025-08-14 |
| 2025-03-31 | $31,546,409 | 230,535 | Shares | Sole | 2025-05-15 |
| 2024-12-31 | $35,678,988 | 233,318 | Shares | Sole | 2025-03-18 |
| 2024-09-30 | $44,681,476 | 230,507 | Shares | Sole | 2025-04-04 |
| 2024-06-30 | $53,535,351 | 230,935 | Shares | Sole | 2025-04-08 |
| 2024-03-31 | $48,963,535 | 227,072 | Shares | Sole | 2024-05-16 |
| 2023-12-31 | $58,591,220 | 226,422 | Shares | Sole | 2024-02-13 |
| 2023-09-30 | $58,169,844 | 226,333 | Shares | Sole | 2023-11-14 |
| 2023-06-30 | $66,527,572 | 233,553 | Shares | Sole | 2023-08-21 |
| 2023-03-31 | $68,891,385 | 247,784 | Shares | Sole | 2023-05-09 |
| 2022-12-31 | $69,651,472 | 251,522 | Shares | Sole | 2023-02-14 |
| 2022-09-30 | $66,786,846 | 250,138 | Shares | Sole | 2022-11-21 |
| 2022-06-30 | $51,405,524 | 252,062 | Shares | Sole | 2022-08-15 |
| 2022-03-31 | $54,070,075 | 256,743 | Shares | Sole | 2022-05-16 |
| 2021-12-31 | $65,700,892 | 273,845 | Shares | Sole | 2022-02-15 |
| 2021-09-30 | $75,382,593 | 266,379 | Shares | Sole | 2021-11-15 |
| 2021-06-30 | $91,499,077 | 264,242 | Shares | Sole | 2021-08-16 |
| 2021-03-31 | $82,531,005 | 295,017 | Shares | Sole | 2021-05-18 |
| 2020-12-31 | $72,602,459 | 296,506 | Shares | Sole | 2021-02-16 |
| 2020-09-30 | $95,271,942 | 335,843 | Shares | Sole | 2020-11-17 |
| 2020-06-30 | $95,330,472 | 356,309 | Shares | Sole | 2020-08-17 |
| 2020-03-31 | $118,894,022 | 375,795 | Shares | Sole | 2020-05-13 |