Name

Place of Incorporation of Organization

MarketAxess Corporation

Delaware

MarketAxess SEF Corporation

Delaware

MarketAxess Technologies Inc.

Delaware

MarketAxess Colombia Corp.

Delaware

MarketAxess International Holdings, LLC

Delaware

MarketAxess Limited

United Kingdom

MarketAxess Europe Limited

United Kingdom

MarketAxess Post-Trade Limited

United Kingdom

MarketAxess Capital Limited

United Kingdom

MarketAxess Canada Company

Nova Scotia, Canada

MarketAxess Plataforma De Negociacao Ltda.

Brazil

MarketAxess Information Consulting (Shanghai) Co., Ltd.

China

MarketAxess Singapore Pte Limited

Singapore

MarketAxess NL B.V.

Netherlands

MarketAxess Post-Trade B.V.

Netherlands

MarketAxess India Markets Private Limited

India

Pragma LLC

New York

Pragma Financial Systems LLC

New York

Trax Limited

United Kingdom