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 13G relating to the Common Stock of Trillium Therapeutics, Inc. is being filed with the Securities and Exchange Commission on behalf of each of them.

February 16, 2016

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