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

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< Wall Street’s Nerds: The World’s Most Powerful Trading Executives

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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

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1. Richard Prager
BlackRock

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2. Chris Isaacson
Bats Global Markets

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3. Bradley Peterson
Nasdaq

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4. Brad Levy
MarkitSERV

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5. Dan Keegan
Citi

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6. Glenn Lesko
Bloomberg Tradebook

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7. Bryan Durkin
CME Group

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8. Mayur Kapani
Intercontinental Exchange

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9. Mike Blum
KCG Holdings

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10. Raj Mahajan
Goldman Sachs Group

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11. Ronald DePoalo
Fidelity Institutional

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12. Nick Themelis
MarketAxess Holdings

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13. Jenny Knott
NEX Optimisation

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14. Billy Hult
Tradeweb Markets

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15. Rob Park
IEX Group

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16. Bill Chow & Richard Leung
Hong Kong Exchanges and Clearing

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17. John Mackay (Mack) Gill
MillenniumIT

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18. Paul Hamill
Citadel Securities

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19. Eric Noll
Convergex

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20. Veronica Augustsson
Cinnober Financial Technology

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21. Tyler Moeller & Joshua Walsky
Broadway Technology

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22. Alasdair Haynes
Aquis Exchange

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23. Gaurav Suri
Arcesium

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24. Manoj Narang
Mana Partners

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25. Michael Chin & Neill Penney
Thomson Reuters

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26. Robert Sloan
S3 Partners

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27. Anton Katz & Stephen Mock
AQR Capital Management

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28. Donal Byrne
Corvil

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29. Stu Taylor
Algomi

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30. Alfred Eskandar
Portware

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31. Steven Randich
Financial Industry Regulatory Authority

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32. R. Cromwell Coulson
OTC Markets Group

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33. Peter Maragos
Dash Financial

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34. John Fawcett
Quantopian

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35. Donald
Ross III
PDQ Enterprises

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36. Jennifer Nayar
Vela Trading Technologies

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37. Dan Raju
Tradier

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38. Susan Estes
OpenDoor Trading

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39. David Mercer
LMAX Exchange

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40. Oki Matsumoto
Monex Group


Jennifer Nayar Eric Noll Raj Mahajan John Mackay MillenniumIT
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