Stephen DeMartin - Email & Phone Number

Wholesale Market Making at Global Trading Systems

Stephen DeMartin is based out of New York City Metropolitan Area and works at Global Trading Systems as Wholesale Market Making.

Stephen DeMartin's Contact Information

Stephen DeMartin's Work email

s*****@gtsx***.com

Valid

Latest update

October 31, 2025

Location

New York City Metropolitan Area

Stephen's current employer

Global Trading Systems

Description

Website

gtsx.com

HQ Location

New York, NY, United States

Number of employees

51-200

Industry

Capital Markets

Latest update

May 1, 2024

Read about Global Trading Systems

Frequent questions about Stephen DeMartin

What company is Stephen DeMartin working for?

Stephen DeMartin works for Global Trading Systems.

What is Stephen DeMartin's function at Global Trading Systems?

Stephen DeMartin is Wholesale Market Making at Global Trading Systems.

Where is Stephen DeMartin based?

Stephen DeMartin is based out of New York City Metropolitan Area.

What is Stephen DeMartin's work email address?

Stephen DeMartin's professional email address is s*****@gtsx***.com

Who are Stephen DeMartin's co-workers?

Stephen DeMartin's colleagues are Saddam Hussain, Matt Lewis, Ari Rubenstein, Dario Fischbein, Bert McCooey, Ken Zhang, Bill White, Glenn Carell, Nicholas Otte, Viktoria Slutskaya, Branden Babcock, Paul Adcock, Jonathan Kepets, Kamil Wasilewski, Brian Dieckmann, Vladimir Neyman, Adam Celentano, Rama Subramaniam, Sandy Lionetti, Rick Gillette, Michael Strashnov, JP Park, Maria Ruiz, Tuukka Rouvinen, Jason Bell, Francois Rouffiac, Maximilian Hall, David Moran, Kari Magedoff, Jérôme Bourgeois, Eric Centeno, Lauren Grazioso, Xiaoliang Ruan, Patrick Clemens, Kirill Dyachenko.

Stephen's co-workers

Saddam Hussain

Co-Chief Executive Officer

Vice President of Corporate Relations

Ken Zhang

Managing Director, Special Situations

Bill White

Managing Director Strategy

Glenn Carell

Managing Director for GTS NYSE Floor Operations

Nicholas Otte

Director, Client Strategy

Viktoria Slutskaya

Director, Talent Acquisition

Branden Babcock

Software Engineering Team Lead

Paul Adcock

Managing Director

Jonathan Kepets

Head of Financial Planning & Analysis & Management Reporting

Kamil Wasilewski

Partner, Trading Model Developer, Director

Brian Dieckmann

Managing Director

Vladimir Neyman

Head of Quant Strategies

Adam Celentano

Trade Desk Head

Rama Subramaniam

Head of Systematic Asset Management

Sandy Lionetti

Managing Director

Rick Gillette

Managing Director Compliance

Michael Strashnov

Managing Director

JP Park

Head of Quantitative Research, Head of Factor Strategies in Options

Maria Ruiz

Managing Director

Tuukka Rouvinen

Director of Core Technology

Jason Bell

Managing Director

Francois Rouffiac

Managing Director, Special Situations

Maximilian Hall

Director, Systematic Trading EU

David Moran

Managing Director, Head of Capital Markets and Advisory Services

Kari Magedoff

Human Resources Director

Wholesale Market Making Sales

Xiaoliang Ruan

Quantitative Researcher

Patrick Clemens

Data Center Engineer

Kirill Dyachenko

Senior Quantitative Developer

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