John Tsai

John Tsai appears in our data through filings on Blueprint Medicines Corp shares, published by SEC (Form 4). The record holds 5 filings, for trades running from 6 January 2023 to 17 July 2025.

None of the filings is a plain purchase or sale on the open market; they cover grants, option exercises and other movements. Grants and option exercises follow pay plans set in advance, so they reveal less about an insider's own view than a purchase made with personal money.

The record was last updated on 21 July 2025 with a transaction in Blueprint Medicines Corp. Typically, a trade is published a median of 3 days after it takes place. For comparison, the SEC allows two business days to file a Form 4. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.