CME — Insider Trading Activity
One insider at CME put personal money into the stock on the open market this window, led by a Director, against 2 insiders selling.
What this means for CME
CME is not showing a cluster buy or a step-change versus its own baseline, so what the window amounts to is a single insider acting alone. Who is buying. The most credible buyer in this window is a Director (< $100K). That insider’s track record: past buys beat the S&P 500 4 of 10 times (avg −4% vs S&P over 6 mo). Overall credibility score: 14/100 (Low).
By the numbers. One insider filed 1 open-market purchase at CME over the window, 293 shares in all at an average of $268.76 a share, most recently on September 25, 2026. On the other side, 2 insiders filed 3 sales covering 15,500 shares at an average of $274.62, the latest on September 14, 2026. That puts the average sale 2% above the average purchase — worth checking against where the stock trades today.
How we read these filings — which transaction codes count, how the cluster and credibility thresholds are set, and what the signals have and haven’t predicted — is written up in the insider trading methodology.
CME insider filings, one by one
All 4 Form 4 filings from the last 90 days, by insider, with share count, dollar amount and date.
Other tickers with the same signal
Companies of a comparable size whose Form 4 filings tripped the same insider buying flag as CME in this window.
- CROX insider trading — 2 buyers, 1 seller, credibility 38/100
- UPST insider trading — 1 buyer, 4 sellers, credibility 54/100
- ONON insider trading — 2 buyers, 2 sellers, credibility 73/100
- BJRI insider trading — 1 buyer, 3 sellers, credibility 21/100
- CLBK insider trading — 16 buyers, credibility 87/100