BIIB NASDAQ
Biogen Inc.
1W: +8.0%
1M: +10.8%
3M: +22.7%
YTD: +41.9%
1Y: +68.1%
3Y: -2.0%
5Y: -6.5%
$252.73
+0.47 (+0.19%)
After Hours: $251.83 (-0.90, -0.35%)
Weekly Expected Move ±4.4%
$229
$240
$251
$262
$273
Credit Risk of going bust: lower than 68% of companies Debt: 18.3% of company value Bonds: $137.0M held by 192 funds, 91 bp over Treasuries → details ▾
Of US companies ranked in the safest four tenths, about 1 in 3,500 filed for bankruptcy within a year (2020-2025).
If the stock fell to about $4.22 (down 98%), Biogen Inc. would be worth roughly what it owes.
Total debt $8.36B against a stock market value of $37.27B.
Distance to default 7.34 (Merton model): prices to 2026-10-26, balance sheet 2026-06-30, debt counted $4.45B (short-term plus half of long-term), stock volatility 33.9%; Altman Z 3.16. A ranking and a back-test, not a forecast.
Bond figures are fund-reported marks (SEC N-PORT) as of Jul 2026. How these are computed.
If the stock fell to about $4.22 (down 98%), Biogen Inc. would be worth roughly what it owes.
Total debt $8.36B against a stock market value of $37.27B.
Distance to default 7.34 (Merton model): prices to 2026-10-26, balance sheet 2026-06-30, debt counted $4.45B (short-term plus half of long-term), stock volatility 33.9%; Altman Z 3.16. A ranking and a back-test, not a forecast.
Bond figures are fund-reported marks (SEC N-PORT) as of Jul 2026. How these are computed.
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View All ESG Filings (124)
| Date | Form | Environmental | Social | Governance | ESG Score | Filing |
|---|---|---|---|---|---|---|
| 2026-06-30 | 10-Q | 70.0 | 63.6 | 74.3 | 69.3 | SEC ↗ |
| 2026-03-31 | 10-Q | 70.2 | 63.5 | 74.0 | 69.2 | SEC ↗ |
| 2025-12-31 | 10-K | 71.7 | 63.8 | 74.4 | 70.0 | SEC ↗ |
| 2025-09-30 | 10-Q | 70.5 | 63.3 | 74.3 | 69.4 | SEC ↗ |
| 2025-06-30 | 10-Q | 71.2 | 63.6 | 74.3 | 69.7 | SEC ↗ |
| 2025-03-31 | 10-Q | 71.0 | 63.6 | 74.1 | 69.6 | SEC ↗ |
| 2024-12-31 | 10-K | 72.0 | 64.1 | 74.4 | 70.2 | SEC ↗ |
| 2024-09-30 | 10-Q | 69.3 | 63.8 | 74.5 | 69.2 | SEC ↗ |
| 2024-06-30 | 10-Q | 69.6 | 63.6 | 74.1 | 69.1 | SEC ↗ |
| 2024-03-31 | 10-Q | 70.2 | 63.4 | 73.9 | 69.1 | SEC ↗ |
| 2023-12-31 | 10-K | 72.3 | 64.4 | 74.5 | 70.4 | SEC ↗ |
| 2023-09-30 | 10-Q | 72.0 | 63.8 | 75.4 | 70.4 | SEC ↗ |
| 2023-06-30 | 10-Q | 72.2 | 64.4 | 75.9 | 70.9 | SEC ↗ |
| 2023-03-31 | 10-Q | 72.0 | 64.2 | 75.4 | 70.6 | SEC ↗ |
| 2022-12-31 | 10-K | 73.8 | 64.3 | 74.5 | 70.8 | SEC ↗ |
| 2022-09-30 | 10-Q | 73.2 | 64.2 | 75.7 | 71.0 | SEC ↗ |
| 2022-06-30 | 10-Q | 73.4 | 63.8 | 75.0 | 70.7 | SEC ↗ |
| 2022-03-31 | 10-Q | 73.8 | 64.5 | 75.6 | 71.3 | SEC ↗ |
| 2021-12-31 | 10-K | 75.0 | 64.7 | 74.9 | 71.5 | SEC ↗ |
| 2021-09-30 | 10-Q | 72.3 | 64.6 | 75.4 | 70.8 | SEC ↗ |
| 2021-06-30 | 10-Q | 72.5 | 64.4 | 74.7 | 70.5 | SEC ↗ |
| 2021-03-31 | 10-Q | 72.1 | 64.0 | 74.1 | 70.1 | SEC ↗ |
| 2020-12-31 | 10-K | 74.9 | 64.6 | 74.2 | 71.2 | SEC ↗ |
| 2020-09-30 | 10-Q | 73.2 | 64.5 | 74.6 | 70.8 | SEC ↗ |
| 2020-06-30 | 10-Q | 72.5 | 64.2 | 74.7 | 70.5 | SEC ↗ |
| 2020-03-31 | 10-Q | 73.2 | 64.4 | 74.2 | 70.6 | SEC ↗ |
| 2019-12-31 | 10-K | 74.5 | 65.0 | 75.3 | 71.6 | SEC ↗ |
| 2019-09-30 | 10-Q | 72.3 | 64.8 | 75.5 | 70.9 | SEC ↗ |
| 2019-06-30 | 10-Q | 73.3 | 65.0 | 76.2 | 71.5 | SEC ↗ |
| 2019-03-31 | 10-Q | 72.8 | 64.8 | 76.7 | 71.4 | SEC ↗ |
| 2018-12-31 | 10-K | 74.2 | 64.5 | 75.1 | 71.3 | SEC ↗ |
| 2018-09-30 | 10-Q | 73.5 | 64.3 | 76.6 | 71.5 | SEC ↗ |
| 2018-06-30 | 10-Q | 73.0 | 64.8 | 76.2 | 71.3 | SEC ↗ |
| 2018-03-31 | 10-Q | 73.4 | 64.3 | 75.7 | 71.2 | SEC ↗ |
| 2017-12-31 | 10-K | 75.3 | 65.3 | 75.2 | 71.9 | SEC ↗ |
| 2017-09-30 | 10-Q | 73.9 | 64.4 | 75.6 | 71.3 | SEC ↗ |
| 2017-06-30 | 10-Q | 73.5 | 64.3 | 75.7 | 71.2 | SEC ↗ |
| 2017-03-31 | 10-Q | 73.2 | 64.0 | 75.6 | 71.0 | SEC ↗ |
| 2016-12-31 | 10-K | 73.8 | 64.8 | 75.1 | 71.2 | SEC ↗ |
| 2016-09-30 | 10-Q | 71.8 | 64.4 | 75.9 | 70.7 | SEC ↗ |
| 2016-06-30 | 10-Q | 71.8 | 64.3 | 75.7 | 70.6 | SEC ↗ |
| 2016-03-31 | 10-Q | 71.7 | 63.9 | 75.9 | 70.5 | SEC ↗ |
| 2015-12-31 | 10-K | 74.0 | 64.8 | 75.4 | 71.4 | SEC ↗ |
| 2015-09-30 | 10-Q | 72.8 | 63.9 | 76.5 | 71.1 | SEC ↗ |
| 2015-06-30 | 10-Q | 73.0 | 63.7 | 76.8 | 71.2 | SEC ↗ |
| 2015-03-31 | 10-Q | 72.9 | 63.3 | 76.5 | 70.9 | SEC ↗ |
| 2014-12-31 | 10-K | 74.6 | 65.1 | 75.3 | 71.7 | SEC ↗ |
| 2014-09-30 | 10-Q | 72.5 | 64.2 | 76.0 | 70.9 | SEC ↗ |
| 2014-06-30 | 10-Q | 71.9 | 64.0 | 76.3 | 70.7 | SEC ↗ |
| 2014-03-31 | 10-Q | 71.9 | 63.5 | 75.3 | 70.2 | SEC ↗ |
| 2013-12-31 | 10-K | 74.1 | 64.3 | 74.5 | 71.0 | SEC ↗ |
| 2013-09-30 | 10-Q | 71.3 | 64.2 | 74.9 | 70.2 | SEC ↗ |
| 2013-06-30 | 10-Q | 71.2 | 64.2 | 74.8 | 70.1 | SEC ↗ |
| 2013-03-31 | 10-Q | 71.8 | 64.2 | 74.8 | 70.3 | SEC ↗ |
| 2012-12-31 | 10-K | 74.1 | 64.7 | 74.7 | 71.2 | SEC ↗ |
| 2012-09-30 | 10-Q | 71.4 | 64.5 | 74.7 | 70.2 | SEC ↗ |
| 2012-06-30 | 10-Q | 70.0 | 64.2 | 74.1 | 69.4 | SEC ↗ |
| 2012-03-31 | 10-Q | 70.5 | 63.7 | 74.0 | 69.4 | SEC ↗ |
| 2011-12-31 | 10-K | 74.6 | 64.2 | 74.0 | 70.9 | SEC ↗ |
| 2011-09-30 | 10-Q | 74.3 | 63.8 | 73.5 | 70.5 | SEC ↗ |
| 2011-06-30 | 10-Q | 70.5 | 63.2 | 73.3 | 69.0 | SEC ↗ |
| 2011-03-31 | 10-Q | 70.4 | 63.0 | 73.2 | 68.9 | SEC ↗ |
| 2010-12-31 | 10-K | 72.3 | 64.2 | 73.9 | 70.1 | SEC ↗ |
| 2010-09-30 | 10-Q | 70.2 | 63.9 | 74.7 | 69.6 | SEC ↗ |
| 2010-06-30 | 10-Q | 69.7 | 63.6 | 74.4 | 69.2 | SEC ↗ |
| 2010-03-31 | 10-Q | 70.2 | 63.7 | 75.3 | 69.7 | SEC ↗ |
| 2009-12-31 | 10-K | 72.2 | 64.1 | 74.4 | 70.3 | SEC ↗ |
| 2009-09-30 | 10-Q | 69.3 | 65.0 | 73.8 | 69.4 | SEC ↗ |
| 2009-06-30 | 10-Q | 69.7 | 64.5 | 73.2 | 69.2 | SEC ↗ |
| 2009-03-31 | 10-Q | 68.8 | 64.6 | 73.5 | 69.0 | SEC ↗ |
| 2008-12-31 | 10-K | 71.2 | 64.6 | 74.0 | 69.9 | SEC ↗ |
| 2008-09-30 | 10-Q | 69.8 | 63.0 | 73.8 | 68.9 | SEC ↗ |
| 2008-06-30 | 10-Q | 69.6 | 63.2 | 73.5 | 68.8 | SEC ↗ |
| 2008-03-31 | 10-Q | 69.4 | 62.6 | 73.5 | 68.5 | SEC ↗ |
| 2007-12-31 | 10-K | 71.3 | 63.5 | 72.8 | 69.2 | SEC ↗ |
| 2007-09-30 | 10-Q | 71.3 | 63.4 | 73.8 | 69.5 | SEC ↗ |
| 2007-06-30 | 10-Q | 70.3 | 63.3 | 73.0 | 68.9 | SEC ↗ |
| 2007-03-31 | 10-Q | 70.5 | 62.8 | 74.0 | 69.1 | SEC ↗ |
| 2006-12-31 | 10-K | 71.0 | 64.2 | 73.0 | 69.4 | SEC ↗ |
| 2006-09-30 | 10-Q | 70.0 | 64.0 | 72.6 | 68.8 | SEC ↗ |
| 2006-06-30 | 10-Q | 70.6 | 63.6 | 72.8 | 69.0 | SEC ↗ |
| 2006-03-31 | 10-Q | 69.3 | 63.1 | 72.0 | 68.2 | SEC ↗ |
| 2005-12-31 | 10-K | 68.5 | 64.2 | 73.6 | 68.8 | SEC ↗ |
| 2005-09-30 | 10-Q | 69.1 | 63.3 | 73.8 | 68.7 | SEC ↗ |
| 2005-06-30 | 10-Q | 69.6 | 63.8 | 73.1 | 68.8 | SEC ↗ |
| 2005-03-31 | 10-Q | 67.7 | 63.8 | 73.1 | 68.2 | SEC ↗ |
| 2004-12-31 | 10-K | 69.8 | 64.2 | 73.1 | 69.0 | SEC ↗ |
| 2004-09-30 | 10-Q | 70.2 | 64.8 | 74.3 | 69.8 | SEC ↗ |
| 2004-06-30 | 10-Q | 72.9 | 64.9 | 72.8 | 70.2 | SEC ↗ |
| 2004-03-31 | 10-Q | 72.4 | 64.5 | 73.4 | 70.1 | SEC ↗ |
| 2003-12-31 | 10-K | 73.1 | 64.9 | 74.9 | 71.0 | SEC ↗ |
| 2003-09-30 | 10-Q | 73.2 | 65.2 | 75.1 | 71.2 | SEC ↗ |
| 2003-06-30 | 10-Q | 72.4 | 65.3 | 75.3 | 71.0 | SEC ↗ |
| 2003-03-31 | 10-K | 69.3 | 64.7 | 73.5 | 69.2 | SEC ↗ |
| 2002-12-31 | 10-K | 69.3 | 65.2 | 73.8 | 69.5 | SEC ↗ |
| 2002-09-30 | 10-Q | 73.2 | 64.8 | 72.7 | 70.2 | SEC ↗ |
| 2002-06-30 | 10-Q | 75.5 | 64.9 | 74.3 | 71.6 | SEC ↗ |
| 2002-03-31 | 10-Q | 75.5 | 64.9 | 75.7 | 72.0 | SEC ↗ |
| 2001-12-31 | 10-K | 70.3 | 64.2 | 74.3 | 69.6 | SEC ↗ |
| 2001-09-30 | 10-Q | 74.8 | 64.4 | 74.9 | 71.4 | SEC ↗ |
| 2001-06-30 | 10-Q | 75.8 | 64.6 | 73.8 | 71.4 | SEC ↗ |
| 2001-03-31 | 10-Q | 75.8 | 64.6 | 74.5 | 71.6 | SEC ↗ |
| 2000-12-31 | 10-K | 70.7 | 63.7 | 74.1 | 69.5 | SEC ↗ |
| 2000-09-30 | 10-Q | 74.1 | 62.9 | 74.6 | 70.5 | SEC ↗ |
| 2000-06-30 | 10-Q | 81.3 | 64.0 | 74.7 | 73.3 | SEC ↗ |
| 2000-03-31 | 10-Q | 81.1 | 64.0 | 75.0 | 73.4 | SEC ↗ |
| 1999-12-31 | 10-K | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1999-09-30 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1999-06-30 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1999-03-31 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1998-12-31 | 10-K405 | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1998-09-30 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1998-06-30 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1998-03-31 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1997-12-31 | 10-K405 | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1997-09-30 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1997-06-30 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1997-03-31 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1996-12-31 | 10-K405 | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1996-09-30 | 10-Q | 69.6 | 59.1 | 69.6 | 66.1 | SEC ↗ |
| 1996-06-30 | 10-Q | 74.6 | 62.8 | 74.5 | 70.7 | SEC ↗ |
| 1996-03-31 | 10-Q/A | 69.6 | 72.8 | 70.8 | 71.0 | SEC ↗ |
| 1995-12-31 | 10-K/A | 69.6 | 72.8 | 69.6 | 70.7 | SEC ↗ |
| 1995-09-30 | 10-Q/A | 69.6 | 69.0 | 70.8 | 69.8 | SEC ↗ |