Director Dorsa Caroline purchased 1,235 shares of BIIB at $122.72 on 2025-05-02, increasing holdings to 27.8K shares. Stock down 48.6% from 52-week high.
Director Dorsa Caroline bought 1,235 shares at $122.72, adding 4.6% to prior holdings of 26.6K shares at a time when BIIB trades at $121.80 (current), down significantly from its 52-week high of $236.80 and down 14.5% over the past 90 days. The purchase occurs amid modest fundamental metrics: P/E of 12.06 on annual revenue of $2.4B with net income of $240.5M, while the company faces year-over-year revenue decline of -1.6%. The transaction represents an open-market purchase by a director and provides a factual data point on insider positioning during a period of material stock decline, though the modest share quantity and single-transaction nature limit broader inference about insider conviction across the company.