BLUEPRINT MEDICINES CORP

CUSIP: 09627Y109 Class: Common Stock

EcoR1 Capital, LLC's Holding History (CIK: 0001587114)

Note: Option positions (PUT/CALL) are excluded.

Q2 2023
Shares 1,798,300 Value ($000) $113,653 Avg Close — Range —
Q1 2020
Shares 13,946 Value ($000) $816 Avg Close — Range —