13G Filing: Armistice Capital and Strongbridge Biopharma PLC (SBBP)

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Exhibit A

AGREEMENT

The undersigned
agree that this Schedule 13G dated September 22, 2017 relating to the Ordinary Shares, par value $0.01 per share, of Strongbridge
Biopharma plc shall be filed on behalf of the undersigned.

Armistice Capital, LLC
By:  /s/ Steven Boyd
Steven Boyd
Managing Member
Armistice Capital Master Fund Ltd.
By:  /s/ Steven Boyd
Steven Boyd
Director
/s/ Steven Boyd
Steven Boyd

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