Cook Elizabeth A 4

What Happened

• Elizabeth A. Cook, a director of CME Group Inc. (CME), sold 1,000 shares in an open-market transaction on March 6, 2026. The shares were disposed at $320.00 each for a total transaction value of $320,000. This was a sale (S) reported on a Form 4 filed March 9, 2026. Sales are often routine transactions and do not necessarily indicate a change in the director's view of the company.

Key Details

• Transaction date and price: March 6, 2026 — 1,000 shares sold at $320.00 per share.
• Total value: $320,000.
• Transaction type: Open-market sale (code S). No 10b5-1 plan or tax-withholding footnotes indicated in the provided data.
• Shares owned after transaction: Not reported in the supplied filing details.
• Filing timeliness: Form 4 filed March 9, 2026 — the filing date is within the typical two-business-day window following the transaction (i.e., timely).

Context

• Sales by directors are common and can reflect routine liquidity needs, diversification, or other personal reasons; they are generally less informative than insider purchases when assessing insider sentiment. No option exercises, grants, or gifts were reported in this transaction.