13G Filing: Adage Capital Management and Calithera Biosciences Inc. (CALA)

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Page 2 of 11 – SEC Filing

1

NAME OF REPORTING PERSON

Adage Capital Partners, L.P.

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ¨

(b) ¨

3 SEC USE ONLY
4

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH:
5

SOLE VOTING POWER

0

6

SHARED VOTING POWER

3,447,873

7

SOLE DISPOSITIVE POWER

0

8

SHARED DISPOSITIVE POWER

3,447,873

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

3,447,873

10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ¨
11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

9.72%

12

TYPE OF REPORTING PERSON

PN

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