Biogen Inc., US09062X1037

Biogen stock slips before the bell after September 24 close

Published on 09/25/2026 at 07:45 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

At the close on September 24, 2026, Biogen stock finished lower while the Nasdaq Composite rose 0.01 percent to 26,939.37. The session outlook comes before the US market opens.

Fotorealistisches Biotech-Labor in Cambridge MA mit Forscherin am Mikroskop und Blick auf den Charles River
Biogen Inc. Neurowissenschaftslabor in Cambridge MA zeigt Forscherin bei Gehirngewebeanalyse unter Mikroskop ISIN US09062X1037, Illustration mit AI erstellt.

Biogen stock closed at USD 226.36 on the Nasdaq on September 24, 2026, down 0.51 percent. The Nasdaq Composite ended at 26,939.37, up 0.01 percent, leaving Biogen behind the reference index by 0.52 percentage points.

September 24, 2026 in numbers

Biogen Inc. (ISIN US09062X1037) ended the session at USD 226.36 on the Nasdaq. A market scan published on September 24, 2026, also showed Biogen at USD 226.36, down 0.51 percent, while the broader technology-heavy index was nearly unchanged.

The Nasdaq Composite closed at 26,939.37 on September 24, 2026, adding 0.01 percent. The comparison provides a dated session benchmark for Biogen stock before the September 25, 2026, opening bell.

September 25, 2026 outlook

The US market session begins after this pre-market article. The Nasdaq Composite reference close and Biogen session figures above are from September 24, 2026; no September 25, 2026, stock price or market reaction is included.

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en | US09062X1037 | BIOGEN INC. | boerse | 70181694 | bgmi