EX-21.1 4 zd20211231ex-211.htm EX-21.1
EXHIBIT 21.1
List of Subsidiaries of
Ziff Davis, Inc.
Ziff Davis, Inc.'s principal affiliates as of December 31, 2021, are listed below. All other affiliates, if considered in the aggregate as a single affiliate, would not constitute a significant subsidiary.

Name |  |  | State or Other Jurisdiction of Incorporation
J2 Global Australia Pty Ltd |  |  | Australia |
j2 Global Canada, Inc. |  |  | Canada |
Ekahau Oy |  |  | Finland |
Ziff Davis Performance Marketing Private Limited |  |  | India |
Electric Mail (Ireland) Limited |  |  | Ireland |
j2 Global Holdings Limited |  |  | Ireland |
j2 Global Ireland Limited |  |  | Ireland |
Ziff Davis Ireland Limited |  |  | Ireland |
Serinus42 B.V. |  |  | Netherlands |
J2 Global UK Limited |  |  | United Kingdom |
Livedrive Internet Limited |  |  | United Kingdom |
Ziff Davis International Ltd. |  |  | United Kingdom |
BabyCenter, LLC |  |  | Delaware, United States |
DW Prime Holdings Inc. |  |  | Delaware, United States |
Ekahau, Inc. |  |  | Delaware, United States |
Everyday Health, Inc. |  |  | Delaware, United States |
Everyday Health Media, LLC |  |  | Delaware, United States |
Humble Bundle, Inc. |  |  | Delaware, United States |
IGN Entertainment, Inc. |  |  | Delaware, United States |
J2 Martech Corp. |  |  | Delaware, United States |
J2 Global Ventures, LLC |  |  | Delaware, United States |
J2 Web Services, Inc. |  |  | Delaware, United States |
Mashable, Inc. |  |  | Delaware, United States |
Offers.com, LLC |  |  | Delaware, United States |
OnTargetJobs, Inc. |  |  | Delaware, United States |
RetailMeNot, Inc. |  |  | Delaware, United States |
SEOMoz, Inc |  |  | Delaware, United States |
SpiceWorks, Inc. |  |  | Delaware, United States |
ThreatTrack Security Holdings, Inc. |  |  | Delaware, United States |
Ziff Davis, LLC |  |  | Delaware, United States |
Ziff Davis Performance Marketing, Inc. |  |  | Delaware, United States |
Mudhook Marketing, Inc. |  |  | Florida, United States |
NetProtect, Inc. |  |  | Florida, United States |
Prime Education, LLC |  |  | Florida, United States |
ThreatTrack Security, Inc. |  |  | Florida, United States |
MedPage Today, L.L.C. |  |  | New Jersey, United States |
Excel Micro, LLC |  |  | Pennsylvania, United States |
Ookla, LLC |  |  | Washington, United States |
Root Wireless, Inc. |  |  | Washington, United States |