Blueprint Medicines Corp (BPMC): Biotechnology Value Fund Reports 10.4% Stake

Page 2 of 11 – SEC Filing

1
NAME OF REPORTING PERSON
Biotechnology Value Trading Fund OS LP
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
  (a) x
  (b) o
3
SEC USE ONLY
4
CITIZENSHIP OR PLACE OF ORGANIZATION
Cayman Islands
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5
SOLE VOTING POWER
0 shares
6
SHARED VOTING POWER
170,320
7
SOLE DISPOSITIVE POWER
0 shares
8
SHARED DISPOSITIVE POWER
170,320
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
170,320
10
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
¨
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
Less than 1%
12
TYPE OF REPORTING PERSON
 
PN

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