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 Leiden Dworak.

Business address: C/O Tscan Therapeutics, Inc., 880 Winter Street, Waltham, MA, 02451

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Leiden Dworak has filed 5 SEC EDGAR filings since 24 Jul 2023

Recent SEC filings for Leiden Dworak 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	22 Jan 2026	20 Jan 2026	001-40603
3	Open 3 document	View SEC filing for 3	3	22 Aug 2025	14 Aug 2025	001-40603
4	Open 4 document	View SEC filing for 4	4	11 Feb 2025	12 Jan 2024	001-40603
4	Open 4 document	View SEC filing for 4	4	24 Jul 2023	21 Jul 2023	001-40603
3	Open 3 document	View SEC filing for 3	3	24 Jul 2023	21 Jul 2023	001-40603

Leiden Dworak files with the SEC under CIK 0001986012. 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.