Form 4 for BIIB Biogen
Accepted 2026-02-10 00:00:00 ET · period of report 2026-02-06 · accession 0000875045-26-000023 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-02-10 | 2026-02-06 | BIIB | Singhal Priya | Head of Development | M - OptEx | $0.00 | +6,900 | 12.1K | +132% | $0 |
| D | 2026-02-10 | 2026-02-09 | BIIB | Singhal Priya | Head of Development | S - Sale+OE | $199.83 | -2,660 | 8,043 | -25% | -$531.5K |
| DM | 2026-02-10 | 2026-02-06 | BIIB | Singhal Priya | Head of Development | F - Tax | $201.18 | -2,468 | 7,432 | -25% | -$496.5K |
| DM | 2026-02-10 | 2026-02-06 | BIIB | Singhal Priya | Head of Development | M - OptEx | $0.00 | -6,900 | 2,217 | -76% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-02-06 | M | A | 2,217 | $0.00 | 8,488.14 | D | — | — | |
| 2 | Common | Common Stock | 2026-02-09 | S | D | 2,660 | $199.83 | 8,043.14 | D | — | — | |
| 3 | Common | Common Stock | 2026-02-06 | F | D | 1,412 | $201.18 | 10,703.14 | D | — | — | |
| 4 | Common | Common Stock | 2026-02-06 | M | A | 4,683 | $0.00 | 12,115.14 | D | — | — | |
| 5 | Common | Common Stock | 2026-02-06 | F | D | 1,056 | $201.18 | 7,432.14 | D | — | — | |
| 6 | Derivative | Restricted Stock Unit | 2026-02-06 | M | D | 4,683 | $0.00 | 9,367 | D | $0.00 · — to 2028-02-06 | 4,683 Common Stock | (F2) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025. |
| 7 | Derivative | Restricted Stock Unit | 2026-02-06 | M | D | 2,217 | $0.00 | 2,217 | D | $0.00 · — to 2027-02-07 | 2,217 Common Stock | (F1) The restricted stock units vest in three (3) equal annual installments, commencing one year after the grant date of 02/07/2024. |