Form 4 Filing for CME Group Inc.

Hilda Harris Piell, Sr MD & Chief HR Officer at CME Group Inc., reported a transaction on March 15, 2026. This involved the acquisition of 7,076 shares of Common Stock Class A, valued at $311.40 per share, under a performance share grant. This acquisition is subject to footnote F1, indicating it relates to a 2022 grant performance share award tied to the company's total shareholder return relative to the S&P 500 over the period of January 1, 2023, through December 31, 2025. Following this, Ms. Piell surrendered 3,039 shares to the company to cover tax withholding obligations, as noted in footnote F2. The net post-transaction shares owned by Ms. Piell are 33,455.