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BIIB · Biogen Inc. · Documents

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$225.88 -1.19 (-0.52%) At close · Sep 30
S&P 500 member Russell 1000 member Rebalance outlook locked
Market Cap
$33.52B
Shares
147.64M
Volume · Sep 30 1.55M Avg daily vol (3M) 1.08M

The company's filings as submitted to the SEC's EDGAR system — 10-K, 10-Q, 8-K, proxy statements and more — listed most recent first.

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Type Filing Date Period Open
Investor Event Transcript 2026-09-14 2026-09-30
Investor Event Transcript 2026-09-09 2026-09-30
10-Q 2026-07-29 2026-06-30
8-K 2026-07-29 —
Investor Event Transcript 2026-07-14 2026-09-30
8-K 2026-07-01 —
8-K/A 2026-06-10 2026-05-14
8-K 2026-06-10 2026-06-09
8-K 2026-05-14 —
8-K 2026-04-29 —
10-Q 2026-04-29 2026-03-31
DEF 14A 2026-04-28 2026-06-09
8-K 2026-04-06 —
8-K 2026-03-31 —
8-K 2026-03-11 —
8-K 2026-02-11 —
10-K 2026-02-06 2025-12-31
8-K 2026-02-06 —
8-K 2026-01-14 2026-01-13
10-Q 2025-10-30 2025-09-30
8-K 2025-10-30 —
8-K 2025-10-14 —
8-K 2025-07-31 —
10-Q 2025-07-31 2025-06-30
8-K 2025-07-07 —
8-K 2025-06-23 2025-06-17
8-K 2025-05-12 2025-05-06
10-Q 2025-05-01 2025-03-31
8-K 2025-05-01 —
DEF 14A 2025-04-28 2025-06-17
8-K 2025-02-12 —
10-K 2025-02-12 2024-12-31
8-K 2025-01-15 2025-01-13
10-Q 2024-10-30 2024-09-30
8-K 2024-10-30 —
8-K 2024-10-30 2024-10-28
8-K 2024-09-12 2024-09-11
8-K 2024-08-14 2024-08-12
10-Q 2024-08-01 2024-06-30
8-K 2024-08-01 —
8-K 2024-06-25 2024-06-20
DEF 14A 2024-04-26 2024-06-20
8-K 2024-04-24 —
10-Q 2024-04-24 2024-03-31
10-K 2024-02-14 2023-12-31
8-K 2024-02-13 —
8-K 2023-12-12 2023-12-06
8-K 2023-11-08 —
10-Q 2023-11-08 2023-09-30
8-K 2023-11-08 2023-11-06
Showing 1–50 of 110 filings
Key facts CIK 875045 CUSIP 09062X103 13F (30d) 23 filings 18 filers Visit website Investor relations