1. AdColony
2. ADMEDO LIMITED
3. Adobe Inc.
4. AdPushup Inc.
5. Adsetica Limited
6. AppNexus acquired by Xandr
7. Criteo SA
8. Facebook Inc.
9. Google LLC
10. Match2One AB
11. MediaMath Inc.
12. MoPub a division of Twitter Inc.
13. PubMatic Inc.
14. Salesforce.com Inc.
15. Smaato Inc.
16. SmartyAds
17. The Rubicon Project Inc.
18. Verizon Media
19. WPP plc
20. Yandex Europe AG