| | | | | | | | |
| Name | | State or Other Jurisdiction of Incorporation |
| Ziff Davis, LLC | | Delaware, United States |
| Everyday Health, Inc. | | Delaware, United States |
| Everyday Health Media, LLC | | Delaware, United States |
| J2 Global Ventures, LLC | | Delaware, United States |
| J2 Martech Corp. | | Delaware, United States |
| J2 Web Services, Inc. | | Delaware, United States |
| RetailMeNot, Inc. | | Delaware, United States |
| Humble Bundle, Inc. | | Delaware, United States |
| FitNow, Inc. | | Delaware, United States |
| IGN Entertainment, Inc. | | Delaware, United States |
| Ekahau, Inc. | | Delaware, United States |
| SEOMoz, Inc | | Delaware, United States |
| OnTargetJobs, Inc. | | Delaware, United States |
| ThreatTrack Security, Inc. | | Delaware, United States |
| BabyCenter, L.L.C. | | Delaware, United States |
| Spiceworks, Inc. | | Delaware, United States |
| Mashable, Inc. | | Delaware, United States |
| Offers.com, LLC | | Delaware, United States |
| The Aberdeen Group, LLC | | Delaware, United States |
| Ziff Davis Performance Marketing, Inc. | | Delaware, United States |
| Ookla, LLC | | Washington, United States |
| Root Wireless, Inc. | | Washington, United States |
| NetProtect, Inc. | | Florida, United States |
| Mudhook Marketing, Inc. | | Florida, United States |
| Prime Education, LLC | | Florida, United States |
| MedPage Today, LLC | | New Jersey, United States |
| J2 Global Ireland Limited | | Ireland |
| Electric Mail (Ireland) Limited | | Ireland |
| Ziff Davis Ireland Limited | | Ireland |
| J2 Global UK Limited | | United Kingdom |
| Livedrive Internet Limited | | United Kingdom |
| Ziff Davis International, Ltd. | | United Kingdom |
| Lifecycle Marketing (Mother and Baby) Ltd | | United Kingdom |
| RetailMeNot UK Limited | | United Kingdom |
| J2 Global Canada, Inc. | | Canada |
| J2 Global Denmark A/S | | Denmark |
| Ekahau Oy | | Finland |
| Serinus 42 B.V. | | Netherlands |
| Demandshore Solutions Pvt. Ltd. | | India |