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AMLX - Amylyx Pharmaceuticals, Inc.

Insider Purchase by Firestone Karen (Dir)

3 Months
After Trade
Before Trade

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Trade Summary

2 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, 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.

Firestone Karen

Firestone Karen

Dir

Karen Firestone is a seasoned investment professional and corporate director known for her expertise in portfolio management, particularly in biotechnology and healthcare sectors. She holds a BA in economics from Harvard College, earned magna cum laude, and an MBA from Harvard Business School. Firestone spent 22 years at Fidelity Investments, managing diversified funds such as the Fidelity Destiny I Fund and Large Cap funds, as well as sector-specific funds in biotechnology, health care, and media. In 2005, she co-founded Aureus Asset Management, an SEC-registered investment advisor managing over $6 billion for high-net-worth individuals, families, and institutions, where she served as Chairman and CEO before transitioning to Chair Emerita in 2025. Firestone joined the board of Amylyx Pharmaceuticals, Inc. (NASDAQ: AMLX) as an independent Class I director on March 16, 2023, serving on the Audit Committee and Nominating & Corporate Governance Committee. She also holds directorships at Hamilton Thorne Ltd. since 2022, and contributes to non-profits including the Boys & Girls Clubs of Boston, Beth Israel Deaconess Medical Center as Trustee Emerita, and the Boston Athletic Association. Firestone demonstrates strong alignment with Amylyx through recent insider activity, including the purchase of 8,100 shares on December 23, 2025, at $12.45 per share, increasing her stake to approximately 55,000 shares. Her financial oversight experience and sector knowledge continue to support her role on Amylyx's board, with a term extending to 2028 pending re-election.

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Trade Price

$12.45

Quantity

8,100

Total Value

$100,845.00

Shares Owned

63,100

Trade Date

Tuesday, December 23, 2025

61 days ago

SEC Filing Date

Tuesday, December 23, 2025

HEALTHCAREBIOTECHNOLOGY

About Amylyx Pharmaceuticals, Inc.

Company Overview

No company information available
View news mentioning AMLX

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