Trade Summary

5 months ago, Firestone Karen, serving as Dir at Amylyx Pharmaceuticals, Inc. (AMLX), purchased 8,100 shares at $12.45 per share, for a total transaction value of $100,845.00. Following this transaction, Firestone Karen now holds 63,100 shares of AMLX.

This purchase represents a 15.00% increase in Firestone Karen's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Tuesday, December 23, 2025 and publicly disclosed via SEC Form 4 filing on Tuesday, December 23, 2025 at 8:48 PM ET, meaning the disclosure happened on the same day as the trade.

Amylyx Pharmaceuticals, Inc. operates in the HEALTHCARE sector, specifically within the BIOTECHNOLOGY industry. Insider buying activity in this sector can provide valuable signals about industry trends and company-specific developments.