CME insider buying
2 cluster buysCME GROUP INC.
When two or more insiders at CME GROUP INC. buy CME in a qualifying detection window, the grouped purchases provide a starting point for further research. Below is every cluster we've detected in CME plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Dec 30, 2025 – Mar 26, 2026Detected Mar 26, 20262 insidersTotal bought$491.7KMarket cap$85.1B
- Dec 27, 2024 – Mar 26, 2025Detected Mar 26, 20252 insidersTotal bought$448.3KMarket cap$85.1B
All notable open-market buys in CME
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Sep 25, 2026 | Director | 292.55 | $268.76 | $78.6K | SEC ↗ |
| Mar 26, 2026 | SHEPARD WILLIAM Rcluster Director | 1,407.78 | $297.38 | $418.6K | SEC ↗ |
| Dec 30, 2025 | SHEPARD WILLIAM Rcluster Director | 251.21 | $278.37 | $69.9K | SEC ↗ |
| Dec 30, 2025 | SHEPARD WILLIAM Rcluster Director | 11.06 | $278.37 | $3.1K | SEC ↗ |
| Sep 25, 2025 | Director | 262.47 | $265.19 | $69.6K | SEC ↗ |
| Sep 25, 2025 | Director | 11.57 | $265.22 | $3.1K | SEC ↗ |
| Jun 25, 2025 | Director | 256.1 | $270.53 | $69.3K | SEC ↗ |
| Jun 25, 2025 | Director | 11.29 | $270.53 | $3.1K | SEC ↗ |
| Mar 26, 2025 | SHEPARD WILLIAM Rcluster Director | 262.56 | $262.62 | $69.0K | SEC ↗ |
| Mar 26, 2025 | SHEPARD WILLIAM Rcluster Director | 11.58 | $262.62 | $3.0K | SEC ↗ |
| Jan 16, 2025 | SHEPARD WILLIAM Rcluster Director | 1,368.84 | $227.96 | $312.0K | SEC ↗ |
| Dec 27, 2024 | SHEPARD WILLIAM Rcluster Director | 264.37 | $232.89 | $61.6K | SEC ↗ |
| Dec 27, 2024 | SHEPARD WILLIAM Rcluster Director | 11.66 | $232.89 | $2.7K | SEC ↗ |
| Sep 25, 2024 | Director | 280.3 | $218.50 | $61.2K | SEC ↗ |
| Sep 25, 2024 | Director | 12.36 | $218.50 | $2.7K | SEC ↗ |
| Jun 25, 2024 | Director | 312.12 | $195.07 | $60.9K | SEC ↗ |
| Jun 25, 2024 | Director | 13.76 | $195.07 | $2.7K | SEC ↗ |
CME insider buying — FAQ
- Are insiders buying CME stock?
- Yes — 2 distinct insiders have bought CME (CME GROUP INC.) on the open market, including 2 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Sep 28, 2026.
- How much CME stock have insiders bought?
- Insiders have bought a combined $1.3M of CME across 17 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in CME?
- A cluster buy is two or more distinct CME GROUP INC. insiders — officers, directors, or 10% owners — each buying CME on the open market within a rolling window. CME has 2 detected cluster buys to date.
- Where does this CME insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in CME
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy CME within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Transactions link to official filings; prices and market capitalizations may be cached market data. Read our methodology and data limits before interpreting the figures. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding CME.