Form 4 for BIIB Biogen
Accepted 2026-05-05 16:11:57 ET · period of report 2026-05-01 · accession 0000875045-26-000046 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-05-05 16:11 | 2026-05-01 | BIIB | Keeney Adam | Head of Corp. Development | M - OptEx | $0.00 | +939 | 6,820 | +16% | $0 |
| D | 2026-05-05 16:11 | 2026-05-01 | BIIB | Keeney Adam | Head of Corp. Development | F - Tax | $187.06 | -455 | 6,365 | -7% | -$85.1K |
| D | 2026-05-05 16:11 | 2026-05-01 | BIIB | Keeney Adam | Head of Corp. Development | M - OptEx | $0.00 | -939 | 0 | -100% | $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 | 2026-05-01 | M | A | 939 | $0.00 | 6,820 | D | — | — | |
| 2 | Common | Common Stock | 2026-05-01 | F | D | 455 | $187.06 | 6,365 | D | — | — | |
| 3 | Derivative | Restricted Stock Unit | 2026-05-01 | M | D | 939 | $0.00 | 0 | D | $0.00 · — to 2026-05-01 | 939 Common Stock | (F1) The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of May 1, 2023. |