LYTIR

Company · BIIB

Biogen Inc.

Name as listed on its exchange; filed with the SEC as BIOGEN INC.

Nasdaq's symbol directory lists BIIB on Nasdaq as “Biogen Inc. - Common Stock”.

In the 12 months to Nov 8, 2026: insiders sold on 2 occasions ($240K); 2 planned-sale notices; 1 filing by holders of 5% or more; 9 congressional trade disclosures; 4 company reports (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Minor Lloyd sold on 2 days all under a 10b5-1 plan latest Aug 4, 2026 sold $240K
Every trade (2)
  1. SELLMinor Lloyd sold Aug 4, 2026 593 shares 10b5-1 plan (scheduled) filing $119K
  2. SELLMinor Lloyd sold Aug 3, 2026 593 shares 10b5-1 plan (scheduled) filing $121K

Planned sales · SEC Form 144

Notice given

A Form 144 is filed before an insider sells restricted stock. It states an intent; the sale, if it happens, appears later on a Form 4. Every recent notice

  1. Minor Lloyd filed Aug 4, 2026 Director 593 shares planned sale date 08/04/2026 filing $119K
  2. Minor Lloyd filed Aug 3, 2026 Director 593 shares planned sale date 08/03/2026 filing $121K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. FMR LLC filed Aug 6, 2026 Schedule 13G/A passive 18,294,523 shares filing 12.4%

Congress · STOCK Act

The Althing

Periodic transaction reports. Amounts are the ranges members report; the trade date is when it happened, the report can come up to 45 days later.

  1. Maria Elvira Salazar (R-FL27): Sale Sep 24, 2026 reported Oct 7, 2026 one of 42 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000
  2. Kevin Hern (R-OK01): Sale Aug 18, 2026 reported Sep 1, 2026 one of 29 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000
  3. Gilbert Cisneros (D-CA31): Purchase Jun 5, 2026 reported Jul 2, 2026 one of 66 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000
  4. Maria Elvira Salazar (R-FL27): Sale Jun 2, 2026 reported Jul 7, 2026 one of 10 trades the member reported that day House Stocks (including ADRs) $15,001 - $50,000
  5. Maria Elvira Salazar (R-FL27): Purchase May 12, 2026 reported Jun 8, 2026 one of 14 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000
  6. Maria Elvira Salazar (R-FL27): Purchase May 11, 2026 reported Jun 8, 2026 one of 14 trades the member reported that day House Stocks (including ADRs) $50,001 - $100,000
  7. Maria Elvira Salazar (R-FL27): Purchase May 11, 2026 reported Jun 8, 2026 one of 14 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000
  8. Alan Armstrong (R-OK): Purchase Mar 27, 2026 reported Jul 21, 2026 one of 703 trades the member reported that day Senate Stock $1,001 - $15,000
  9. Gilbert Cisneros (D-CA31): Purchase Jan 30, 2026 reported Feb 13, 2026 one of 151 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition filing Oct 28, 2026
  2. Results of operations and financial condition filing Jul 29, 2026
  3. Results of operations and financial condition filing Jul 1, 2026
  4. Submission of matters to a vote of security holders filing Jun 10, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.