1. 63 Moons Technologies Limited
2. Akuna Capital
3. AlgoBulls Technologies Private Limited
4. AlpacaDB Inc.
5. Argo SE
6. Ava Trade Markets Ltd.
7. Binatix Inc.
8. Citadel LLC
9. CMC Markets Group
10. Coinigy Inc
11. CREDIT SUISSE GROUP AG
12. DRW Holdings
LLC.
13. Fidelity National Information Services Inc.
14. Fiserv Inc.
15. Flow Traders Group
16. FXCM Australia Pty. Limited
17. Gelber Group
LLC.
18. Geneva Trading
19. Hudson River Trading
20. InfoReach Inc.
21. iRageCapital Advisory Private Limited
22. Jump Trading LLC
23. KeyCorp
24. Liquid Capital Group
25. London Stock Exchange Group
26. Maven Securities Ltd
27. MetaQuotes Ltd.
28. NinjaTrader Group
LLC
29. Optiver
30. Oracle Corporation
31. Pepperstone Markets Limited
32. Pit Base LLC.
33. Powerweave Heuristic Investment Technologies Pvt Ltd.
34. Quantlab Financial
35. Questrade Group
36. RSJ Securities a.s.
37. Scotiabank
38. SOFTWARE AG
39. Spotware Systems Ltd.
40. Symphony Fintech Solutions Private Limited
41. Tata Consultancy Services Limited
42. Tethys Technology
43. Thomson Reuters Holdings Inc.
44. Tickeron Inc.
45. Tradebot Systems
46. TradeStation Group Inc.
47. TRALITY GmbH
48. Two Sigma Securities
LLC
49. Vatic Investments
50. VIRTU Financial Inc.
51. Wyden AG
52. XTX Markets Limited