EXHIBIT 99
FORM 4 JOINT FILER INFORMATION
Names of Joint Filers:
Canaan X L.P.
Canaan Partners X LLC
Address of Joint Filers:
c/o Canaan Partners
285 Riverside Avenue, Suite 250
Westport, CT 06880
Designated Filer:
Canaan X L.P.
Issuer and Ticker Symbol:
IDEAYA Biosciences, Inc. [IDYA]
Date of Event:
May 28, 2019
Signatures of Joint Filers:
Canaan X L.P.
By: Canaan Partners X LLC, its General Partner
By: /s/ Janine MacDonald
Attorney-in-Fact
Canaan Partners X LLC
By: /s/ Janine MacDonald
Attorney-in-Fact
