CME Group Director Elizabeth Cook Sells 500 Shares

What Happened Elizabeth A. Cook, a director of CME Group Inc. (CME), sold 500 shares in an open-market transaction on September 14, 2026. The shares traded at $280.11 each, for a total sale value of approximately $140,055. This was a sale (code S), which is often routine insider selling and not by itself a clear signal about company prospects.

Key Details

• Transaction date and price: 2026-09-14 @ $280.11 per share
• Shares sold: 500; Total proceeds ≈ $140,055
• Transaction type: Sale (open market or private sale) — reported on SEC Form 4 (Accession: 0001156375-26-000054)
• Shares owned after transaction: Not specified in the provided filing
• Notable footnotes: Filing does not indicate a 10b5-1 plan, gift, option exercise, or tax-withholding transaction
• Timeliness: Form 4 was filed on 2026-09-14 (same date as the reported transaction), indicating a timely filing

Context Insider sales can be for many personal reasons (diversification, taxes, liquidity) and do not necessarily reflect management's view of the company's future. Purchases tend to be more informative about confidence in the stock; this single sale should be viewed as one data point among other insider activity and company fundamentals.