In Eric Noll, institutional investors have a voice in Washington. The president and CEO of agency-focused brokerage Convergex has for the past two years served on the Securities and Exchange Commission's Equity Market Structure Advisory Committee, representing his buy-side clients' interests. The 54-year-old chairs the panel's market quality subcommittee, which in November delivered recommendations on the National Market System antivolatility proposal known as Limit Up–Limit Down, marketwide circuit breakers, and uniform opening time.
Convergex was in turnaround mode when Noll, a former Susquehanna International Group and Nasdaq executive, joined in 2013. Today, serving 3,000 clients around the world, it is active in high-touch and electronic trading, prime brokerage, clearing, and commission management. In "ETFs — You're (Probably) Doing It Wrong," one of a series of recent thought papers, Noll observed that trading in the instruments is highly concentrated; 1 percent of the 1,976 U.S.-listed ETFs have almost half of the total assets under management, and many investors are missing out on some top performers. He put in a plug for Convergex's ETF Direct, where clients can "source multiple quotes in all U.S.-listed ETFs" and find block-size liquidity without payment for order flow or hidden fees.
 2. Chris Isaacson Bats Global Markets  3. Bradley Peterson Nasdaq  4. Brad Levy MarkitSERV  5. Dan Keegan Citi |
 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 MillenniumIT  18. Paul Hamill Citadel Securities  19. Eric Noll Convergex  20. Veronica Augustsson Cinnober Financial Technology |
 21. Tyler Moeller & Joshua Walsky Broadway Technology  22. Alasdair Haynes Aquis Exchange  23. Gaurav Suri Arcesium  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 Corvil  29. Stu Taylor Algomi  30. Alfred Eskandar Portware |
 31. Steven Randich Financial Industry Regulatory Authority  32. R. Cromwell Coulson OTC Markets Group  33. Peter Maragos Dash Financial  34. John Fawcett Quantopian  35. Donald Ross III PDQ Enterprises |
 36. Jennifer Nayar Vela Trading Technologies  37. Dan Raju Tradier  38. Susan Estes OpenDoor Trading  39. David Mercer LMAX Exchange  40. Oki Matsumoto Monex Group |
