The largest holder of CME stock is Vanguard Capital Management LLC, with 23.7 million shares (6.58% of the company), worth about $6.76 billion as of September 25, 2026. The 10 largest holders together own 32.2%.
In Q2 2026, 1,789 institutional holdings reports listed shares worth $76.00 billion.
Insiders reported 74 transactions in the last two years: 24 sales worth $22.77 million and 3 purchases. The newest one on file is from March 26, 2026 (Shepard William R, Director).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through March 26, 2026.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Vanguard Capital Management LLC | 23.7 million | 6.58% | $6.8B |
| BlackRock Advisors LLC | 23.6 million | 6.55% | $6.7B |
| State Street Corporation | 16.3 million | 4.55% | $4.7B |
| Eaton Vance Management | 9.7 million | 2.71% | $2.8B |
| Geode Capital Management LLC | 9.3 million | 2.58% | $2.6B |
| Vanguard Portfolio Management LLC | 9.2 million | 2.55% | $2.6B |
| Capital Research & Management Co. (World Investors) | 6.8 million | 1.90% | $1.9B |
| BlackRock Life Ltd. | 6.3 million | 1.75% | $1.8B |
| JPMorgan Investment Management, Inc. | 5.8 million | 1.60% | $1.6B |
| Sanders Capital LLC | 5.1 million | 1.41% | $1.4B |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 1,789 | – | $76.0B |
| Q1 2026 | 1,877 | 322.0 million | $95.1B |
| Q4 2025 | 1,811 | 326.0 million | $88.8B |
| Q3 2025 | 1,745 | 327.0 million | $88.2B |
| Q2 2025 | 1,766 | 327.0 million | $90.0B |
| Q1 2025 | 1,683 | 325.0 million | $88.4B |
| Q4 2024 | 1,584 | 322.0 million | $74.6B |
| Q3 2024 | 1,473 | 327.0 million | $72.1B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Shepard William R | Mar 26, 2026 | Director | Purchase at price 297.38 per share. | $437,101 |
| Marcus Jonathan L | Mar 17, 2026 | General Counsel | Sale at price 333.37 per share. | $1.1M |
| Marcus Jonathan L | Mar 17, 2026 | Officer | Sale at price 313.37 per share. | $1.0M |
| Fitzpatrick Lynne | Mar 13, 2026 | Chief Executive Officer | Stock Award(Grant) at price 311.40 per share. | $1.7M |
| Mccourt Timothy Francis | Mar 13, 2026 | Officer | Stock Award(Grant) at price 311.40 per share. | $1.7M |
| Marcus Jonathan L | Mar 13, 2026 | General Counsel | Stock Award(Grant) at price 311.40 per share. | $1.6M |
| Winkler Julie | Mar 13, 2026 | Officer | Stock Award(Grant) at price 311.40 per share. | $2.6M |
| Sprague Suzanne | Mar 13, 2026 | Chief Operating Officer | Stock Award(Grant) at price 311.40 per share. | $1.7M |
| Tobin Jack J | Mar 13, 2026 | Officer | Stock Award(Grant) at price 311.40 per share. | $189,331 |
| Cutinho Sunil Kiran | Mar 13, 2026 | Chief Technology Officer | Stock Award(Grant) at price 311.40 per share. | $2.6M |
| Sammann Derek Louis | Mar 13, 2026 | Officer | Stock Award(Grant) at price 311.40 per share. | $2.6M |
| Vroman Kendal L | Mar 13, 2026 | Officer | Stock Award(Grant) at price 311.40 per share. | $2.2M |
Newest 12 of 74 insider transactions in the last two years.
Vanguard Capital Management LLC, with 6.58% of the company (as of September 25, 2026). Next: BlackRock Advisors LLC (6.55%) and State Street Corporation (4.55%).
1,789 institutional holdings reports listed CME shares in Q2 2026 worth $76.00 billion.
In the last two years insiders reported 24 sales and 3 purchases (74 transactions in all); the newest on file is from March 26, 2026.