Orbimed Advisors SC 13D Ikena Oncology / ORBIMED ADVISORS ownership change

Exhibit 1

JOINT FILING AGREEMENT

The undersigned hereby agree that the Statement on Schedule 13D, dated April 14, 2021, with respect to the ordinary shares of Ikena Oncology, 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. Each of the undersigned agrees to be responsible for the timely filing of this Statement, 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 the 14^th day of April 2021.

ORBIMED ADVISORS LLC
By:	/s/ Jonathan T. Silverstein
	Name: Jonathan T. Silverstein
	Title: Member
ORBIMED CAPITAL GP VI LLC
By:	ORBIMED ADVISORS LLC, its managing member
By:	/s/ Jonathan T. Silverstein
	Name: Jonathan T. Silverstein
	Title: Member of OrbiMed Advisors LLC
ORBIMED GENESIS GP LLC
By:	ORBIMED ADVISORS LLC, its managing member
By:	/s/ Jonathan T. Silverstein
	Name: Jonathan T. Silverstein
	Title: Member of OrbiMed Advisors LLC
ORBIMED CAPITAL LLC
By:	/s/ Jonathan T. Silverstein
	Name: Jonathan T. Silverstein
	Title: Member