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Biogen BIIB Business Segments

Q2 '26Q1 '26Q4 '25Q3 '25Q2 '25
Estimated additional payments upon achievement of development and commercial milestones by Product
Felzartamab$730M

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Questions, answered.

How does Biogen break its business down?
Biogen (BIIB) reports revenue by product across 2 parts — Contract manufacturing, royalty and other revenue and Other. Each is extracted from the segment footnotes and tracked over time.
Where does Biogen's segment data come from?
Segment breakdowns are pulled from the segment footnotes in Biogen's SEC filings (the XBRL dimensional tags), so every line ties back to a reported figure. Switch between quarterly, annual, and TTM, or open any segment for its full history.