Event Brief
Dec 15, 2025 at 5:01 AM ET
Sanofi stock slumps after MS drug setbacks
By The BriefBrief
Sanofi shares fell as U.S. review of MS drug delayed and trial failed.
WHO: Sanofi
WHAT: Stock slump due to regulatory and trial setbacks
WHEN: Dec 14, 2025 at 7:00 PM ET
WHERE: United States
WHY: Regulatory review not completed and trial for MS drug unsuccessful
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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