Biogen Inc. (BIIB) results explained: sales up 5%

Quantooo Lab · 2026-10-28

What happened?

Biogen Inc. (BIIB) reported results on 28 Oct, covering the 9 months to 30 Sep.

The numbers in plain words

Sales were up 5.3% compared with the same period a year earlier.

Source: the company's 10-Q filed 2026-10-28.

How did the share price react?

Since the results, the share price has moved −3.43% (to the close of 28 Oct), while the S&P 500 moved +0.34%.

What changed in our score?

Our score went from 59 to 60 out of 100; the fundamentals part went from 15 to 29. Every step of the calculation: BIIB stock page.

How bumpy could the next month be?

Our volatility model expects the next month to be bumpier than usual for BIIB (31% a year vs a normal 30%).

What does it mean?

Results describe the past few months. They don't tell you where the price goes next, and our own tests found our scores don't reliably predict that either.

Educational, not investment advice.