EXHIBIT 99.1
AGREEMENT
In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that this Statement on Schedule 13G relating to the Common Stock of Versartis, Inc. is being filed with the Securities and Exchange Commission on behalf of each of them.
February 10, 2015
| BAKER BROS. ADVISORS LP | ||
| By: Baker Bros. Advisors (GP) LLC, its general partner | ||
| By: | /s/ Scott L. Lessing | |
| Name: Scott L. Lessing | ||
| Title: President | ||
| BAKER BROS. ADVISORS (GP) LLC | ||
| By: | /s/ Scott L. Lessing | |
| Name: Scott L. Lessing Title: President | ||
| /s/ Julian C. Baker | |
| Julian C. Baker | |
| /s/ Felix J. Baker | |
| Felix J. Baker |
