| Date | Issuer | Type | Security | Price | Units | Value | |
|---|---|---|---|---|---|---|---|
| Biogen Inc. Chief Accounting Officer | F | Common Stock | |||||
| Biogen Inc. Chief Accounting Officer | M | Common Stock | |||||
| Biogen Inc. Chief Accounting Officer | M | Restricted Stock Unit | |||||
| Biogen Inc. Chief Accounting Officer | A | Restricted Stock Unit | |||||
| Biogen Inc. Chief Accounting Officer | F | Common Stock |