MarketAxess Holdings Inc. (NASDAQ:MKTX) the operator of a leading electronic trading platform for fixed-income securities, will issue a press release announcing its third quarter 2025 financial results on Friday, November 7, 2025, before the market opens. Chris Concannon, Chief Executive Officer, and Ilene Fiszel Bieler, Chief Financial Officer, will host a conference call to provide a strategic update and discuss the Company's financial results and outlook on Friday, November 7, 2025 at 11:00 a.m. ET.

To access the conference call, please dial +1-646-307-1963 (U.S./International) and use the ID 1832176. The Company will also host a live audio Webcast of the conference call on the Investor Relations section of the Company's website at http://investor.marketaxess.com. The Webcast will also be archived on http://investor.marketaxess.com for 90 days following the announcement.

About MarketAxess

MarketAxess (NASDAQ:MKTX) operates a leading electronic trading platform that delivers greater trading efficiency, a diversified pool of liquidity and significant cost savings to institutional investors and broker-dealers across the global fixed-income markets. Approximately 2,100 firms leverage MarketAxess' patented technology to efficiently trade fixed-income securities. Our automated and algorithmic trading solutions, combined with our integrated and actionable data offerings, help our clients make faster, better-informed decisions on when and how to trade on our platform. MarketAxess' award-winning Open Trading® marketplace is widely regarded as the preferred all-to-all trading solution in the global credit markets. Founded in 2000, MarketAxess connects a robust network of market participants through an advanced full trading lifecycle solution that includes automated trading solutions, intelligent data and index products and a range of post-trade services. Learn more at www.marketaxess.com and on X @MarketAxess.

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INVESTOR RELATIONS

Stephen Davidson

MarketAxess Holdings Inc.

+1 212 813 6313

sdavidson2@marketaxess.com

MEDIA RELATIONS

Marisha Mistry

MarketAxess Holdings Inc.

+1 917 267 1232

mmistry@marketaxess.com

MarketAxess to Host Conference Call Announcing Third Quarter 2025 Financial Results on Friday, November 7, 2025