Aon plc reported an insider ownership change involving Darren Zeidel in the company’s Class A Ordinary Stock. The Form 4 was filed on July 21, 2026, and identifies July 17, 2026, as the transaction date. The filing states that the reported transaction was carried out under a Rule 10b5-1 trading plan that Zeidel entered into on November 5, 2025. Such plans allow corporate insiders to schedule securities transactions in advance, typically to reduce concerns that trades were made on the basis of material nonpublic information. The document text provided does not include the transaction table that normally specifies the transaction code, number of shares acquired or disposed of, transaction price, or Zeidel’s beneficial ownership following the transaction. As a result, the filing confirms that an ownership change occurred in Aon Class A Ordinary Stock on July 17, but the supplied document excerpt does not disclose whether the action was a sale, purchase, award, option exercise, or another type of reportable transaction. The filing was signed on Zeidel’s behalf by Colby Alexis pursuant to a power of attorney dated July 21, 2026. The most substantive detail available is that the transaction was prearranged under the November 2025 10b5-1 plan, which is relevant because it indicates the trade was planned months before the reported July 2026 ownership change.