MarketAxess Holdings Inc. (MKTX) reported an insider ownership-change filing involving Scott Pintoff on July 10, 2026. The filing relates to MarketAxess common stock, par value $0.003 per share, and was signed by Patrick Wilson as attorney-in-fact for Pintoff. The document is a Form 4, the standard filing used to disclose changes in beneficial ownership by corporate insiders. However, the provided filing text does not include the transaction table that normally specifies the key economic details of the action—such as whether the transaction was a purchase, sale, option exercise, restricted stock vesting, grant, withholding for taxes, or other event. As a result, the filing confirms that an ownership change was reported for Scott Pintoff on July 10, 2026, but it does not provide the transaction code, number of shares acquired or disposed of, price per share, ownership form, or Pintoff’s beneficial ownership after the transaction. Those details are necessary to determine the size, direction, and financial significance of the insider action. The filing matters because Form 4 reports are closely watched by investors for signals about insider activity at public companies. In this case, though, the available text only establishes that MarketAxess common stock was involved and that an insider ownership change was reported; it does not reveal the substance of the transaction.