EX-23.1 3 mktx-ex23_1.htm EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-265483, 333-239084, 333-205858, 333-136101 and 333-120229) of MarketAxess Holdings Inc. of our report dated February 24, 2026, relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP
New York, New York
February 24, 2026