13G

Exhibit 99.1

13G

CUSIP No. 00000X000

AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of Common Stock of Essa Pharma, Inc.

Dated:		January 22, 2016
OMEGA FUND IV, L.P.
BY:		Omega Fund IV GP, L. P
ITS:		GENERAL PARTNER
BY:		Omega Fund IV G.P. Manager, Ltd.
ITS:		GENERAL PARTNER
By:		/s/ Xxxxxxx Xxx
		Director
OMEGA FUND IV GP, L.P
BY:		Omega Fund IV G.P. Manager, Ltd.
ITS:		GENERAL PARTNER
By:		/s/ Xxxxxxx Xxx
		Director
OMEGA FUND IV G.P. MANAGER, LTD.
By:		/s/ Xxxxxxx Xxx
		Director

/s/ Xxxxxxx Xxx

Xxxxxxx Xxx

/s/ Xxxxxx Xxxxxxxxxxx

Xxxxxx Xxxxxxxxxxx

/s/ Xxxx-Xxxx Xxxxxx

Xxxx-Xxxx Xxxxxx