BIIB - CIK 0000875045
BIOGEN INC. has filed 2,690 documents with the SEC between 1996 and 2026. The most frequent type is insider trade (1,544 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Insider trade | 4 | 2017-06-09 | 2017-06-07 |
| Insider trade | 4 | 2017-06-09 | 2017-06-07 |
| Insider trade | 4 | 2017-06-09 | 2017-06-07 |
| Insider trade | 4 | 2017-06-09 | 2017-06-07 |
| Insider trade | 4 | 2017-06-05 | 2017-06-01 |
| SEC correspondence | UPLOAD | 2017-05-25 | - |
| Company correspondence | CORRESP | 2017-05-10 | - |
| Insider trade | 4 | 2017-05-04 | 2017-05-02 |
| SEC correspondence | UPLOAD | 2017-05-03 | - |
| Insider trade | 4 | 2017-05-02 | 2017-05-01 |
| Insider trade | 4 | 2017-05-01 | 2017-04-27 |
| Insider trade | 4 | 2017-04-27 | 2017-04-25 |
| Proxy materials | DEFA14A | 2017-04-26 | - |
| Proxy statement | DEF 14A | 2017-04-26 | 2017-06-07 |
| Quarterly report | 10-Q | 2017-04-25 | 2017-03-31 |
| Major company event | 8-K | 2017-04-25 | 2017-04-25 |
| Insider trade | 4 | 2017-04-04 | 2017-04-03 |
| Company correspondence | CORRESP | 2017-04-04 | - |
| SEC correspondence | UPLOAD | 2017-03-23 | - |
| Insider trade | 4 | 2017-03-14 | 2017-03-13 |
| Insider trade | 4 | 2017-03-03 | 2017-03-01 |
| Insider trade | 4 | 2017-03-03 | 2017-03-01 |
| Insider trade | 4 | 2017-03-02 | 2017-02-28 |
| Insider trade | 4 | 2017-03-02 | 2017-02-28 |
| Insider trade | 4 | 2017-03-02 | 2017-02-28 |
| Insider trade | 4 | 2017-03-02 | 2017-02-28 |
| Insider trade | 4 | 2017-03-02 | 2017-02-28 |
| Insider trade | 4 | 2017-03-02 | 2017-02-28 |
| Insider trade | 4 | 2017-03-01 | 2017-02-27 |
| NO ACT | - | 2017-02-23 | 2017-02-16 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Insider trade | 4 | 2017-02-17 | 2017-02-15 |
| Passive ownership stake (update) | SC 13G/A | 2017-02-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2017-02-10 | - |
| Annual report | 10-K | 2017-02-02 | 2016-12-31 |
| Major company event | 8-K | 2017-02-02 | 2017-02-02 |
| Insider trade | 4 | 2017-02-01 | 2017-02-01 |
| Major company event | 8-K | 2017-02-01 | 2017-02-01 |
| Major company event | 8-K | 2017-01-26 | 2017-01-26 |
| Passive ownership stake (update) | SC 13G/A | 2017-01-19 | - |
| Major company event | 8-K | 2017-01-17 | 2017-01-17 |
| Insider trade | 4 | 2017-01-10 | 2017-01-09 |
| New insider ownership | 3 | 2016-12-22 | 2016-12-22 |