John Tsai - 18 Jun 2025 Form 4 Insider Report for Blueprint Medicines Corp (BPMC)

Role: Director
Signature: /s/ Melissa Masse
Issuer symbol: BPMC
Transactions as of: 18 Jun 2025
Net transactions value: +$499,924
Form type: 4
Filing time: 24 Jun 2025, 16:19:47 UTC
Previous filing: 14 Jun 2024
Next filing: 21 Jul 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Tsai John	Director	45 SIDNEY STREET, CAMBRIDGE	/s/ Melissa Masse	23 Jun 2025	0001960467

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BPMC	Common Stock	Award	$499,924	+3,902	+45%	$128.12	12,644	18 Jun 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The reported transaction involved the Reporting Person's receipt of a grant of restricted stock units. The restricted stock units vest with respect to 100% of the shares underlying the restricted stock units on the earlier of (i) June 18, 2026 and (ii) the next annual meeting of the Issuer's stockholders. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Content

The reported transaction involved the Reporting Person's receipt of a grant of restricted stock units. The restricted stock units vest with respect to 100% of the shares underlying the restricted stock units on the earlier of (i) June 18, 2026 and (ii) the next annual meeting of the Issuer's stockholders. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.