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 John Tsai.

Business address: Blueprint Medicines Corporation, 45 Sidney Street, Cambridge, MA, 02139

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John Tsai has filed 6 SEC EDGAR filings since 09 Jan 2023

Recent SEC filings for John Tsai including 4, 3.

Form type	Document	Filing	Description	Filing date	Reporting date	File number(s)
4	Open 4 document	View SEC filing for 4	OWNERSHIP DOCUMENT	21 Jul 2025	17 Jul 2025	001-37359
4	Open 4 document	View SEC filing for 4		24 Jun 2025	18 Jun 2025	001-37359
4	Open 4 document	View SEC filing for 4		14 Jun 2024	12 Jun 2024	001-37359
4	Open 4 document	View SEC filing for 4		23 Jun 2023	21 Jun 2023	001-37359
4	Open 4 document	View SEC filing for 4		09 Jan 2023	06 Jan 2023	001-37359
3	Open 3 document	View SEC filing for 3		09 Jan 2023	06 Jan 2023	001-37359

John Tsai files with the SEC under CIK 0001960467. 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.