13G Filing: Adage Capital Management and Sangamo Therapeutics Inc (SGMO)

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 SIGNATURES

After reasonable
inquiry and to the best of his or its knowledge and belief, each of the undersigned certifies that the information set forth in
this statement is true, complete and correct.

DATE: June 2, 2017

ADAGE CAPITAL PARTNERS, L.P.
By:  Adage Capital Partners GP, L.L.C.,
its general partner
By:  Adage Capital Advisors, L.L.C.,
its managing member
/s/ Robert Atchinson
Name:  Robert Atchinson
Title: Managing Member
ADAGE CAPITAL PARTNERS GP, L.L.C.
By:  Adage Capital Advisors, L.L.C.,
its managing member
/s/ Robert Atchinson
Name:  Robert Atchinson
Title: Managing Member
ADAGE CAPITAL ADVISORS, L.L.C.
/s/ Robert Atchinson
Name:  Robert Atchinson
Title: Managing Member
ROBERT ATCHINSON
/s/ Robert Atchinson
ROBERT ATCHINSON, individually
PHILLIP GROSS
/s/ Phillip Gross
PHILLIP GROSS, individually

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