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The 2017 Trading Tech 40: John Mackay (Mack) Gill

17. John Mackay (Mack) Gill
Chief Executive Officer
MillenniumIT – London Stock Exchange Group
Last year: 18

Market technology providers routinely push the envelope in the rush to execute trades in the smallest possible fraction of a second. The 800-employee, Sri Lanka–based MillenniumIT, which London Stock Exchange Group acquired in 2009 and has been headed by John Mackay (Mack) Gill since 2013, developed one of the world's fastest exchange platforms for the LSE and has more than 40 client sites around the world using its systems. It ensures extremely low latency by deploying field-programmable gate array (FPGA) hardware in operations such as the LSE Group Ticker Plant.

But high-performance technologies aren't just for the front end of the transaction cycle. With the Millennium PostTrade clearing, settlement, and depository platform, the company relies on graphics processing units (GPUs) to deliver real-time, cross-asset analytic and risk management capabilities. Having completed a sizable installation of PostTrade last year at the Singapore Exchange, MillenniumIT is taking it up a notch with the next-generation platform now in progress for the LSEG-controlled clearinghouse LCH. "Real-time capabilities will be extended to stress testing, backtesting and member-driven 'what if' scenarios, providing a comprehensive and flexible real-time enterprisewide risk management framework," LSEG said in an announcement last fall. "Clearinghouses are systemically important entities that cut across many financial institutions," notes Gill, 47, who spent 19 years with various units of SunGard Data Systems before becoming CEO of MillenniumIT. "Improved analytics in real time, with enhanced margining and netting capabilities, are important tools for central counterparties such as LCH."

The 2017 Trading Tech 40

1. Richard Prager
2. Chris Isaacson
Bats Global Markets
3. Bradley Peterson
4. Brad Levy
5. Dan Keegan
6. Glenn Lesko
Bloomberg Tradebook
7. Bryan Durkin
CME Group
8. Mayur Kapani
Intercontinental Exchange
9. Mike Blum
KCG Holdings
10. Raj Mahajan
Goldman Sachs Group
11. Ronald DePoalo
Fidelity Institutional
12. Nick Themelis
MarketAxess Holdings
13. Jenny Knott
NEX Optimisation
14. Billy Hult
Tradeweb Markets
15. Rob Park
IEX Group
16. Bill Chow & Richard Leung
Hong Kong Exchanges and Clearing
17. John Mackay (Mack) Gill
18. Paul Hamill
Citadel Securities
19. Eric Noll
20. Veronica Augustsson
Cinnober Financial Technology
21. Tyler Moeller & Joshua Walsky
Broadway Technology
22. Alasdair Haynes
Aquis Exchange
23. Gaurav Suri
24. Manoj Narang
Mana Partners
25. Michael Chin & Neill Penney
Thomson Reuters
26. Robert Sloan
S3 Partners
27. Anton Katz & Stephen Mock
AQR Capital Management
28. Donal Byrne
29. Stu Taylor
30. Alfred Eskandar
31. Steven Randich
Financial Industry Regulatory Authority
32. R. Cromwell Coulson
OTC Markets Group
33. Peter Maragos
Dash Financial
34. John Fawcett
35. Donald
Ross III
PDQ Enterprises
36. Jennifer Nayar
Vela Trading Technologies
37. Dan Raju
38. Susan Estes
OpenDoor Trading
39. David Mercer
LMAX Exchange
40. Oki Matsumoto
Monex Group

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