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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1597264	Blueprint Medicines Corp	BPMC	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1756941	Christina Rossi	C/O Blueprint Medicines Corporation 45 Sidney Street Cambridge MA 02139	Chief Commercial Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2021-03-04	87	$89.10	32,995	No	4	S	Direct
Common Stock	Disposition	2021-03-04	1,272	$86.61	31,723	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Direct

Footnotes

The sale reported on this Form 4 represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. The sale occurred automatically to satisfy the tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the Reporting Person.
The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.08 to $89.25 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.