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 2765 Sand Hill Road Menlo Park, CA 94025 Designated Filer: Canaan X L.P. Issuer and Ticker Symbol: Iterum Therapeutics plc [ITRM] Date of Event: May 30, 2018 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