| CUSIP No. 92511W108 | SCHEDULE 13G | Page 8 of 8 Pages |
EXHIBIT A
JOINT FILING AGREEMENT
The undersigned hereby agree that the Statement on this Schedule 13G dated June 25, 2018 (the “Schedule 13G”), with respect to the common stock of Verrica Pharmaceuticals Inc. is filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and that this Agreement shall be included as an Exhibit to this Schedule 13G. Each of the undersigned agrees to be responsible for the timely filing of the Schedule 13G, and for the completeness and accuracy of the information concerning itself contained therein. This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.
IN WITNESS WHEREOF, the undersigned have executed this Agreement as of June 25, 2018.
| | OrbiMed Advisors LLC | |
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| | By: | /s/ Jonathan T. Silverstein | |
| | | Name: | Jonathan T. Silverstein | |
| | | Title: | Member of OrbiMed Advisors LLC | |
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| | By: | /s/ Sven H. Borho | |
| | | Name: | Sven H. Borho | |
| | | Title: | Member of OrbiMed Advisors LLC | |
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| | By: | /s/ Carl L. Gordon | |
| | | Name: | Carl L. Gordon | |
| | | Title: | Member of OrbiMed Advisors LLC | |
| | OrbiMed Capital GP VI LLC | |
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| | By: | OrbiMed Advisors LLC its Managing Member |
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| | By: | /s/ Jonathan T. Silverstein | |
| | | Name: | Jonathan T. Silverstein | |
| | | Title: | Member of OrbiMed Advisors LLC | |
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| | By: | /s/ Sven H. Borho | |
| | | Name: | Sven H. Borho | |
| | | Title: | Member of OrbiMed Advisors LLC | |
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| | By: | /s/ Carl L. Gordon | |
| | | Name: | Carl L. Gordon | |
| | | Title: | Member of OrbiMed Advisors LLC | |
