A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.

Why are some filings missing?

New filings appear as the SEC updates EDGAR, and older records can vary by availability.

How often is this page updated?

Updates follow new EDGAR submissions and periodic data refreshes.

SEC EDGAR filings, ownership reports, and insider transactions for Karen Firestone.

Business address: C/O Amylyx Pharmaceuticals, Inc., 43 Thorndike St., Cambridge, MA, 02141
Top holdings (ownership): AMLX

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Karen Firestone has filed 8 SEC EDGAR filings since 20 Mar 2023

Recent SEC filings for Karen Firestone including 4, 3.

Form type	Document	Filing	Description	Filing date	Reporting date	File number(s)
4	Open 4 document	View SEC filing for 4	4	23 Dec 2025	23 Dec 2025	001-41199
4	Open 4 document	View SEC filing for 4	4	09 Jun 2025	05 Jun 2025	001-41199
4	Open 4 document	View SEC filing for 4	4	09 Sep 2024	05 Sep 2024	001-41199
4	Open 4 document	View SEC filing for 4	4	07 Jun 2024	06 Jun 2024	001-41199
4	Open 4 document	View SEC filing for 4	4	19 Dec 2023	15 Dec 2023	001-41199
4	Open 4 document	View SEC filing for 4	FORM 4 SUBMISSION	12 Jun 2023	08 Jun 2023	001-41199
4	Open 4 document	View SEC filing for 4	FORM 4 SUBMISSION	20 Mar 2023	16 Mar 2023	001-41199
3	Open 3 document	View SEC filing for 3	FORM 3 SUBMISSION	20 Mar 2023	16 Mar 2023	001-41199

Karen Firestone files with the SEC under CIK 0001969821. This page aggregates EDGAR filings and related ownership activity.

What is a CIK?: A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?: New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?: Updates follow new EDGAR submissions and periodic data refreshes.