MARKETAXESS CORPORATION

LEI: GPSMMRI21JE7ZCVYF972

Entity

Legal Name

Legal Name Language Code

Legal Address

251 LITTLE FALLS DRIVE New Castle WILMINGTON, Delaware (US-DE), 19808 UNITED STATES

Headquarters Address

251 LITTLE FALLS DRIVE New Castle WILMINGTON, Delaware (US-DE), 19808 UNITED STATES

Legal Jurisdiction Country

UNITED STATES (US)

Legal Jurisdiction Region

Delaware (US-DE)

Registration Authority

Registration Authority ID

(US-DE): Division of Corporations, Department of State (RA000602)

Registration Authority Entity ID

2794375

Entity Legal Form Code

Corporation (XTIQ)

Entity Category

GENERAL

Entity Status

ACTIVE

Entity Creation Date

1997-09-09 00:00:00

Relationships

Direct Parent

Parent Information

Parent Entity

Parent LEI

LEI

5493002U1CA1XJOVID83

Relationship Periods

Relationship Period 1

Start Date

2024-01-01 00:00:00

End Date

2024-06-30 00:00:00

Period Type

ACCOUNTING_PERIOD

Relationship Period 2

Start Date

1997-09-09 00:00:00

Period Type

RELATIONSHIP_PERIOD

Relationship Status

ACTIVE

Accounting Standards

Accounting Standard 1

Standard

US_GAAP

Relationship Registration

Initial Registration Date

2024-11-15 12:30:42

Last Update Date

2025-02-19 11:42:10

Registration Status

PUBLISHED

Validation Sources

FULLY_CORROBORATED

Validation Documents

ACCOUNTS_FILING

Validation Reference

https://www.sec.gov/Archives/edgar/data/1278021/000095017022001811/mktx-ex21_1.htm

Ultimate Parent

Parent Information

Parent Entity

Parent LEI

LEI

5493002U1CA1XJOVID83

Relationship Periods

Relationship Period 1

Start Date

2024-01-01 00:00:00

End Date

2024-06-30 00:00:00

Period Type

ACCOUNTING_PERIOD

Relationship Period 2

Start Date

1997-09-09 00:00:00

Period Type

RELATIONSHIP_PERIOD

Relationship Status

ACTIVE

Accounting Standards

Accounting Standard 1

Standard

US_GAAP

Relationship Registration

Initial Registration Date

2024-11-15 12:30:42

Last Update Date

2025-02-19 11:42:10

Registration Status

PUBLISHED

Validation Sources

FULLY_CORROBORATED

Validation Documents

ACCOUNTS_FILING

Validation Reference

https://www.sec.gov/Archives/edgar/data/1278021/000095017022001811/mktx-ex21_1.htm

Registration

Initial Registration Date

2012-06-06 15:53:00

Last Update Date

2025-02-19 11:42:10

Next Renewal Date

2026-02-28 17:38:50

Registration Status

ISSUED

Managing LOU

529900T8BM49AURSDO55

Validation Sources

FULLY_CORROBORATED

Validation Authority

Validation Authority ID

(US-DE): Division of Corporations, Department of State (RA000602)

Validation Authority Entity ID

2794375