{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-293433","form_type":"8-K","ticker":"BIIB","cik":"0000875045","company_name":"BIOGEN INC.","filed_at":"2023-12-12T23:59:59+00:00","discovered_at":"2026-05-14T18:03:32.210592+00:00","generated_at":"2026-06-07T14:31:15.422620+00:00","sec_items":["5.03","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Biogen amends bylaws to update stockholder notice requirements and align with SEC universal proxy rules","bullets":["Requires disclosure of derivative/synthetic long positions from stockholders proposing business or nominations.","Aligns director nomination procedures with Rule 14a-19, including 67% proxy solicitation representation requirement.","Limits number of nominees a stockholder may propose to number of directors to be elected at meeting.","Requires stockholder proxy solicitations to use non-white proxy cards; white cards reserved for Board use.","Updates adjournment, quorum, and stockholder list provisions to conform to recent Delaware law changes."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-293433","json":"https://secwatch.observer/filing/0001193125-23-293433.json","markdown":"https://secwatch.observer/filing/0001193125-23-293433.md","text":"https://secwatch.observer/filing/0001193125-23-293433.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/875045/000119312523293433/0001193125-23-293433-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/875045/000119312523293433/d850833d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T14:31:15.422620+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}