BIIB Stock Split History

BIIB's most recent stock split occurred on January 18, 2001. It was a 3-for-1 split.

Summary

Total Stock Splits: 2

Stock Splits Table

Ex Date	Adjustment Factor	Split From	Split To	Split Type
1999-12-21	2	1	2	stock split
2001-01-18	3	1	3	stock split

Stock Splits Chart

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Discover Biogen Inc's stock split history, key dates, split ratios, and their impact on share prices, market capitalization, and overall investment growth.

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BIIB Historical Prices

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