EXHIBIT 99.1
JOINT FILING 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 13D relating to the Common Stock, $0.001 par value, of Seattle Genetics, Inc. is being filed with the Securities and Exchange Commission on behalf of each of them.
December 16, 2013
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 |
FBB2, LLC | ||
By: | /s/ Julian C. Baker | |
Name: Julian C. Baker | ||
Title: Manager |