Comments on SEC Roundtable on Trade-Through Prohibitions and Roundtable on Rule 611 of Regulation NMS

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Date Received
Date Letter Type Commenter Name
Public Comment Joseph Saluzzi, Partner, Themis Trading LLC
Public Comment Mark Marcelis
Public Comment Haoxiang Zhu, Associate Professor of Finance, MIT Sloan School of Management
Public Comment Patrick Sexton EVP, General Counsel, and Corporate Secretary, Cboe Global Markets, Inc.
Public Comment Chris Nagy, Research Director, Healthy Markets Association
Public Comment Samuel Raffalli
Public Comment Rivera, Retail Investor
Public Comment Jenn-James Wang
Public Comment John A. Zecca, Executive Vice President, Global Chief Legal, Risk & Regulatory Officer, Nasdaq
Public Comment Raz Tirosh and Calvin Hayes, Jane Street Capital, LLC
Public Comment Adrian Griffiths, Head of Market Structure, MEMX LLC ("MEMX")
Public Comment Benjamin L. Schiffrin , Director of Securities Policy, Better Markets, Inc.
Public Comment Ari Burstein, General Counsel, Imperative Execution
Public Comment FIA Principal Traders Group (FIA PTG), Secretary, FIA Principal Traders Group
Public Comment Chris Nagy, Research Director, Healthy Markets Association
Public Comment Matt Billings, President, Robinhood Financial, LLC and Robinhood Securities, LLC
Public Comment William O'Brien, Former CEO, Direct Edge
Public Comment Patrick Sexton, EVP, General Counsel and Corporate Secretary, Cboe Global Markets, Inc.
Public Comment Kelvin To, Founder and President of Data Boiler Technologies
Public Comment Timothy J. Boyle, Chief Operating Officer, McKay Brothers, LLC
Public Comment James Angel, Associate Professor, Georgetown University
Public Comment R. T. Leuchtkafer
Public Comment Allen Spence
Public Comment Peter J. Haynes, CFA, Index and Market Structure Research, TD Securities

Last Reviewed or Updated: Dec. 18, 2025

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