CITADEL SECURITIES v. SECURITIES & EXCHANGE COM'N

Attorney(s) appearing for the Case

Jeffrey B. Wall argued the cause for petitioner. On the briefs were Jeffrey B. Korn , Patricia O. Haynes , Mark T. Stancil , and Kristin Bender.

Christina M. Carroll , Kristen C. Rodriguez , Douglas W. Henkin , and Richard M. Zuckerman were on the brief for amici curiae New York Stock Exchange, LLC, et al. in support of petitioner.

Alexandra A.E. Shapiro and Daniel J. O'Neill were on the brief for amicus curiae Andrew N. Vollmer in support of petitioner.

Emily True Parise , Senior Litigation Counsel, U.S. Securities and Exchange Commission, argued the cause for respondent. With her on the brief were Michael A. Conley , Acting General Counsel, Dominick V. Freda , Assistant General Counsel, and Brooke Wagner , Attorney.

Catherine E. Stetson argued the cause for intervenor. With her on the brief were Katherine B. Wellington and Reedy C. Swanson.   Sundeep Iyer and Neal K. Katyal entered appearances.

Dennis M. Kelleher , Stephen W. Hall , and Jason R. Grimes were on the brief for amicus curiae Better Markets, Inc. in support of respondent.

Daniel A. Rubens and Alexandra Bursak were on the brief for amicus curiae XTX Markets, LLC in support of respondent.

Thomas A. Burns was on the brief for amicus curiae Healthy Markets Association in support of respondent.

Before: Rao and Walker, Circuit Judges, and Sentelle, Senior Circuit Judge.