Michael Landsittel - 08 May 2024 Form 4 Insider Report for Blueprint Medicines Corp (BPMC)

Role: CHIEF FINANCIAL OFFICER
Signature: /s/ Melissa Masse, Attorney-in-Fact
Issuer symbol: BPMC
Transactions as of: 08 May 2024
Net transactions value: +$65,297
Form type: 4
Filing time: 10 May 2024, 16:05:35 UTC
Previous filing: 06 May 2024
Next filing: 17 May 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BPMC	Common Stock	Options Exercise	$49,299	+26,363	+56%	$1.87^*	73,649	08 May 2024	Direct	F1
transaction	BPMC	Common Stock	Options Exercise	$15,998	+1,818	+2.5%	$8.80^*	75,467	08 May 2024	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	BPMC	Stock Option (Right to Buy)	Options Exercise	$0	+26,363		$0.000000^*	0	08 May 2024	Common Stock	26,363	$1.87	Direct	F2
transaction	BPMC	Stock Option (Right to Buy)	Options Exercise	$0	+1,818		$0.000000^*	0	08 May 2024	Common Stock	1,818	$8.80	Direct	F3

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

Explanation of Responses:

Id	Content
F1	This transaction involved a cash exercise of options without a subsequent sale of the underlying shares of common stock.
F2	The options were granted on February 10, 2015 and are fully vested as of the transaction date.
F3	The options were granted on October 8, 2014 and are fully vested as of the transaction date.