EXHIBIT A
Agreement of Joint Filing
The undersigned hereby agree that a single Schedule 13G (or any amendment thereto) relating to the Common Stock of Arcus Biosciences, Inc. shall be filed on behalf of each of the undersigned and that this Agreement shall be filed as an exhibit to such Schedule 13G.
Date: February 11, 2019
| GV 2016, L.P. | ||
| By: | GV 2016 GP, L.P., its General Partner | |
| By: | GV 2016 GP, L.L.C., its General Partner | |
| By: | Alphabet Holdings LLC, its Sole Member | |
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Secretary | |
| GV 2016 GP, L.P. | ||
| By: | GV 2016 GP, L.L.C., its General Partner | |
| By: | Alphabet Holdings LLC, its Sole Member | |
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Secretary | |
| GV 2016 GP, L.L.C. | ||
| By: | Alphabet Holdings LLC, its Sole Member | |
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Secretary | |
| GV 2017, L.P. | ||
| By: | GV 2017 GP, L.P., its General Partner | |
| By: | GV 2017 GP, L.L.C., its General Partner | |
| By: | Alphabet Holdings LLC, its Sole Member | |
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Secretary | |
| GV 2017 GP, L.P. | ||
| By: | GV 2017 GP, L.L.C., its General Partner | |
| By: | Alphabet Holdings LLC, its Sole Member | |
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Secretary | |
| GV 2017 GP, L.L.C | ||
| By: | Alphabet Holdings LLC, its Sole Member | |
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Secretary | |
| Alphabet Holdings LLC | ||
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Secretary | |
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| XXVI Holdings Inc. | ||
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Assistant Secretary | |
| Alphabet Inc. | ||
| By: | /s/ Kathryn W. Hall | |
| Name: | Kathryn W. Hall | |
| Title: | Assistant Secretary | |
Page 19 of 19