Karen Firestone

Companies

• Amylyx PharmaceuticalsBoard member Mar 20, 2023 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Amylyx Pharmaceuticals AMLX116,900 shares²$3.2M at $27.07Aug 31, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Aug 31, 2026Exercised options 25,000 shares at $5.05 of Amylyx Pharmaceuticals²
• Aug 31, 2026Exercised options 25,000 shares at $1.76 of Amylyx Pharmaceuticals²
• May 21, 2026Bought 3,800 shares at $13.51 of Amylyx Pharmaceuticals³
• Dec 23, 2025Bought 8,100 shares at $12.45 of Amylyx Pharmaceuticals⁴
• Sep 5, 2024Bought 50,000 shares at $2.13 of Amylyx Pharmaceuticals⁵
• Dec 15, 2023Bought 4,000 shares at $14.97 of Amylyx Pharmaceuticals⁶
• Mar 16, 2023Bought 1,000 shares at $31.99 of Amylyx Pharmaceuticals⁷