Tsai John — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

Tsai John is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.

Recent Transactions

Date	Ticker	Company	Code	Shares	Price	Value
2025-07-17	BPMC	Blueprint Medicines Corp	J — Other acquisition / disposition	8.7K	—
2025-07-17	BPMC	Blueprint Medicines Corp	D — Derivative transaction	3.9K	—

Frequently Asked Questions

Who is Tsai John?

Tsai John is a corporate insider — currently tracked as Director. InsiderAlpha tracks every SEC Form 4 filing in real time.

Where can I see all of Tsai John's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

Learn More

What is SEC Form 4?
How to read insider buying signals
Understanding Rule 10b5-1 trading plans
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