MARKETAXESS HOLDINGS INC (MKTX)

Nitin A. Mirwani — Appointment | Appointed as Chief Accounting Officer.; Will also serve as the Company's principal accounting officer for SEC filings.; Previous roles include Global Controller at CBRE Investment Management and Bumble Inc., and Vice President at PGIM Inc.; Holds a bachelor's degree from the University of Mumbai and an MBA from Baruch College, Zicklin School of Business.; Is a Certified Public Accountant.

Dean Berry — Employment Agreement | Base Salary: GBP £560,000 annually.; Annual Cash Incentive Target (2026): GBP £840,000.; Target Year-End Equity Award Value (2026): GBP £1.8 million.; Equity Award Composition: 50% time-based Restricted Stock Units (RSUs) vesting in three equal installments annually, and 50% performance-based Performance Stock Units (PSUs) cliff-vesting on the third anniversary of the grant date, subject to continued service and performance criteria.; Cash Lost Opportunity Award: GBP £500,000, payable by MAEL's first payroll run after the Effective Date, subject to repayment provisions.; Equity Lost Opportunity Award: GBP £1.563 million in PSUs, expected to be granted in February 2026, cliff-vesting on the third anniversary of the grant date, subject to continued service and performance criteria.; Cash Make-Whole Award: GBP £500,000, representing unvested equity scheduled to vest before May 1, 2026, payable by March 31, 2026, subject to repayment provisions.; Equity Make-Whole Award: GBP £3.437 million in RSUs, representing unvested equity scheduled to vest on or after May 1, 2026, expected to be granted on the first day of the first calendar month following the Effective Date, vesting ratably over three years, subject to continued service.; Post-employment covenants: Includes non-competition and non-solicitation clauses.; Termination Notice: At least six months written notice required by either party. Garden leave is permitted.

Christopher R. Concannon stock (Grant FV $1,200,025)

Ilene J. Fiszel Bieler stock (Grant FV $554,736)

Kevin M. McPherson stock (Grant FV $723,653)

Naineshkumar S. Panchal stock (Grant FV $477,533)

Christophe Roupie stock (Grant FV $481,403)

Christopher R. Concannon grant (stock)