Schedule 13G

MKTX Schedule 13G filing by Vanguard Capital Management

Vanguard Capital Management reported beneficial ownership of 1.9M shares, representing 5.32% of MARKETAXESS HOLDINGS INC in this filing.

FiledApr 30, 2026

Ownership dateMar 31, 2026

Reported shares1.9M

Reported ownership5.32%

Ownership details

Voting and dispositive power reported in the filing

These figures describe the reporting filer’s disclosed voting and investment authority. They should be read together with the reported share count and percentage.

Sole voting power 282.8K

Shared voting power 0

Sole dispositive power 1.9M

Shared dispositive power 0

Price context

Price dates alongside the ownership filing

Price data provides market context around the disclosure. It does not identify the filer’s actual transaction price.

Close near filing date$157.19as of Apr 30, 2026

Latest tracked price$162.44as of Aug 5, 2026

Source

Original filing and accession

Use the SEC filing as the primary source when you need the complete disclosure, footnotes, exhibits, or reporting-person details.

Reporting filer: Vanguard Capital Management
CIK: CIK0002100119
Accession: 0002100119-26-000861
Form: Schedule 13G

Open SEC filing View MKTX ownership history

Read the filing in context

Understand what a Schedule 13 filing does—and does not—tell you.

How to read a Schedule 13G → Does a 13G mean the shares were just bought? → Filing date vs. ownership date →