Form4insider filings, from the source

Company · CIK 0001278021 · SIC 6211 — Security Brokers, Dealers & Flotation Companies · Nasdaq

MARKETAXESS HOLDINGS INC · MKTX

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $1.1M · 4net −$1.1M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesJun 28Jul 13Jul 28Aug 13Aug 28Sep 13Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 10, 2026 SForm 4 →Sep 11, 4:15 pm EDTScott PintoffGeneral Counsel and Secretary100$163.32$16,33211,486−0.86%10b5-1
Sep 10, 2026 SForm 4 →Sep 11, 4:15 pm EDTWilliam Frank Cruger Jr.Director6,164$163.20$1,005,9654,033−60.4%
Aug 12, 2026 GForm 4 →Aug 13, 4:15 pm EDTEmily Hope PortneyDirector4,170——1,571—
Aug 10, 2026 SForm 4 →Aug 10, 4:15 pm EDTScott PintoffGeneral Counsel and Secretary100$162.60$16,26011,586−0.86%10b5-1
Aug 7, 2026 GForm 4 →Aug 7, 4:15 pm EDTJane ChwickDirector606——9,223—
Jul 10, 2026 SForm 4 →Jul 10, 4:15 pm EDTScott PintoffGeneral Counsel and Secretary100$115.12$11,51211,686−0.85%10b5-1

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.