Exhibit 99.1
13G
| CUSIP No. 29668H104 |
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/ Richard Lim | |
| Director | ||
| OMEGA FUND IV GP, L.P | ||
| BY: | Omega Fund IV G.P. Manager, Ltd. | |
| ITS: | GENERAL PARTNER | |
| By: | /s/ Richard Lim | |
| Director | ||
| OMEGA FUND IV G.P. MANAGER, LTD. | ||
| By: | /s/ Richard Lim | |
| Director | ||
/s/ Richard Lim |
| Richard Lim |
/s/ Otello Stampacchia |
| Otello Stampacchia |
/s/ Anne-Mari Paster |
| Anne-Mari Paster |
