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STATE OF MICHIGAN RETIREMENT SYSTEM → BIIB
STATE OF MICHIGAN RETIREMENT SYSTEM BIIB Position History
Biogen Inc. • Healthcare
Quarters held
5
Latest value
$9.7M
Q3 2026
Peak value
$9.7M
First seen
Q3 2025
Dollar value over time
Show data table
| Period | Position value |
|---|---|
| Q3 2025 | $6M |
| Q4 2025 | $7.6M |
| Q1 2026 | $7.9M |
| Q2 2026 | $9.4M |
| Q3 2026 | $9.7M |
Quarter-by-quarter history
Every disclosed snapshot of the position
| Quarter | Value | Shares | % Portfolio | Change |
|---|---|---|---|---|
| Q3 2026 | $9.7M | 42.9K | — | — |
| Q2 2026 | $9.4M | 43.6K | — | — |
| Q1 2026 | $7.9M | 43.0K | — | — |
| Q4 2025 | $7.6M | 43.1K | — | — |
| Q3 2025 | $6M | 43.1K | — | — |
Other funds holding BIIB
$2.8B
$2.2B
$2.2B
$2.1B
$1.8B
$1.6B
$1.6B
$1.6B