X0306 4 2018-05-30 0 0001659323 Iterum Therapeutics plc ITRM 0001619859 CANAAN X L.P. 2765 SAND HILL ROAD MENLO PARK CA 94025 1 0 1 0 0001673228 Canaan Partners X LLC 2765 SAND HILL ROAD MENLO PARK CA 94025 1 0 1 0 Ordinary Shares 2018-05-30 4 C 0 721408 A 721408 D Ordinary Shares 2018-05-30 4 C 0 275446 A 996854 D Ordinary Shares 2018-05-30 4 C 0 229660 A 1226514 D Ordinary Shares 2018-05-30 4 P 0 506656 13.00 A 1733170 D Series A Preferred Shares 2018-05-30 4 C 0 721408 0.00 D Ordinary Shares 721408 0 D Series B-1 Preferred Shares 2018-05-30 4 C 0 275446 0.00 D Ordinary Shares 275446 0 D Series B-2 Preferred Shares 2018-05-30 4 C 0 229660 0.00 D Ordinary Shares 229660 0 D The Series A Preferred Shares automatically converted into Ordinary Shares of the Issuer on a 1-to-1 basis upon closing of the initial public offering of the Issuer and had no expiration date. These shares are held directly by Canaan X L.P. (the "Canaan Fund"). The sole general partner of the Canaan Fund is Canaan Partners X LLC ("Canaan X", and together with the Canaan Fund, the "Canaan Entities"), and each may be deemed to have sole voting, investment and dispositive power with respect to the shares held by the Canaan Fund. Brenton K. Ahrens, a manager and member of Canaan X, serves as the representative of the Canaan Entities on the Issuer's board of directors. Investment and voting decisions with respect to the shares held by the Canaan Fund are made by the managers of Canaan X, collectively. Canaan X disclaims Section 16 beneficial ownership of the shares held by the Canaan Fund, except to the extent, if any, of its pecuniary interest therein. The Series B-1 Preferred Shares automatically converted into Ordinary Shares of the Issuer on a 1-to-1 basis upon closing of the initial public offering of the Issuer and had no expiration date. The Series B-2 Preferred Shares automatically converted into Ordinary Shares of the Issuer on a 1-to-1 basis upon closing of the initial public offering of the Issuer and had no expiration date. Exhibit 99 - Form 4 Joint Filer Information Canaan X L.P., By: Canaan Partners X LLC, its general partner, By: /s/ Janine MacDonald, Attorney-in-Fact 2018-05-30 Canaan Partners X LLC, By: /s/ Janine MacDonald, Attorney-in-Fact 2018-05-30