13D Filing: Bay City Capital Fund V, L.P. and Sunesis Pharmaceuticals Inc (SNSS)

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SIGNATURE

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

Date: November 6, 2017
/s/ Fred Craves

Fred Craves, Managing Director

Bay City
Capital LLC

for itself, for and on behalf of Bay City Capital Management V LLC in its capacity as manager thereof, and for and on behalf
of Bay City Capital Fund V, L.P. and Bay City Capital Fund V Co-Investment Fund, L.P. in its capacity as manager of Bay City Capital Management V LLC, the general partner of Bay City Capital Fund V, L.P. and Bay City Capital Fund V Co-Investment
Fund, L.P.

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