What the executives and directors of CME Group actually did with their own shares, decoded from three years of SEC Form 4 filings.
The tape: three years of insider trades
Every marker sits at the exact price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the gray strip is routine flow (vestings, tax withholding, gifts) that headlines love to miscount as selling.
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price.
Skin in the game
Directly held shares as reported after each trade, indexed to 100 five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades.
Who holds what
| Insider | Role | Shares held | Buys 12 m | Sales 12 m |
|---|---|---|---|---|
| SHEPARD WILLIAM R | Director | 263.6K | $661K | — |
| Hobert William W | Director | 127.3K | — | — |
| SIEGEL HOWARD J | Director | 70.3K | — | — |
| DUFFY TERRENCE A Chairman and CEO | CEO | 64.6K | — | $17.2M |
| Mulchrone Patrick J | Director | 54.1K | — | — |
| Durkin Bryan T | Director | 43.7K | — | $1.3M |
| Holzrichter Julie Sr MD Chief Operating Officer | COO | 40.4K | — | — |
| Cook Elizabeth A | Director | 39.2K | — | $320K |
| GERDES LARRY G | Director | 36.7K | — | — |
| Winkler Julie Sr MD Chief Commercial Officer | Officer | 33.8K | — | — |
| Sammann Derek Sr MD Gl Hd Commodities Mkts | Officer | 28K | — | $2M |
| Piell Hilda Harris Sr MD & Chief HR Officer | Officer | 27.7K | — | $1.8M |
| Cutinho Sunil Chief Information Officer | Officer | 27.2K | — | $3.2M |
| Fitzpatrick Lynne President and CFO | CFO | 26.4K | — | — |
Open-market trade log
| Date | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| 2026-06-25 | SHEPARD WILLIAM R (Director) | Open-market buy | 14 | $230.57 | $3K |
| 2026-06-25 | SHEPARD WILLIAM R (Director) | Open-market buy | 325 | $230.57 | $75K |
| 2026-05-18 | Piell Hilda Harris (Officer) | Discretionary sale | 5,753 | $304.63 | $1.8M |
| 2026-05-15 | DUFFY TERRENCE A (CEO) | Discretionary sale | 9,004 | $299.58 | $2.7M |
| 2026-05-15 | DUFFY TERRENCE A (CEO) | Discretionary sale | 26K | $298.14 | $7.8M |
| 2026-03-26 | SHEPARD WILLIAM R (Director) | Open-market buy | 62 | $297.38 | $18K |
| 2026-03-26 | SHEPARD WILLIAM R (Director) | Open-market buy | 1,408 | $297.38 | $419K |
| 2026-03-17 | Marcus Jonathan L (Officer) | Planned sale (10b5-1) | 3,291 | $313.37 | $1M |
| 2026-03-17 | Marcus Jonathan L (Officer) | Planned sale (10b5-1) | 3,291 | $333.37 | $1.1M |
| 2026-03-12 | Vroman Ken (Officer) | Discretionary sale | 5,160 | $309.00 | $1.6M |
| 2026-03-06 | Cook Elizabeth A (Director) | Discretionary sale | 1,000 | $320.00 | $320K |
| 2026-02-23 | Durkin Bryan T (Director) | Discretionary sale | 4,200 | $309.65 | $1.3M |
| 2026-02-20 | GEPSMAN MARTIN J (Director) | Discretionary sale | 300 | $305.90 | $92K |
| 2026-02-06 | Suskind Dennis (Director) | Discretionary sale | 748 | $300.00 | $224K |
| 2025-12-30 | SHEPARD WILLIAM R (Director) | Open-market buy | 11 | $278.37 | $3K |
| 2025-12-30 | SHEPARD WILLIAM R (Director) | Open-market buy | 251 | $278.37 | $70K |
| 2025-12-11 | DUFFY TERRENCE A (CEO) | Discretionary sale | 11.9K | $270.05 | $3.2M |
| 2025-12-11 | DUFFY TERRENCE A (CEO) | Discretionary sale | 13.1K | $269.10 | $3.5M |
| 2025-11-20 | Sammann Derek (Officer) | Discretionary sale | 1,314 | $275.74 | $362K |
| 2025-11-20 | Sammann Derek (Officer) | Discretionary sale | 5,886 | $275.65 | $1.6M |
| 2025-11-03 | Ford Harold Eugene Jr. (Director) | Discretionary sale | 1,000 | $263.53 | $264K |
| 2025-09-25 | SHEPARD WILLIAM R (Director) | Open-market buy | 12 | $265.22 | $3K |
| 2025-09-25 | SHEPARD WILLIAM R (Director) | Open-market buy | 262 | $265.19 | $70K |
| 2025-09-18 | Marcus Jonathan L (Officer) | Planned sale (10b5-1) | 392 | $262.00 | $103K |
| 2025-09-16 | McCourt Timothy Francis (Officer) | Discretionary sale | 379 | $259.83 | $98K |
| 2025-09-16 | Marcus Jonathan L (Officer) | Planned sale (10b5-1) | 376 | $258.96 | $97K |
| 2025-08-26 | Cutinho Sunil (Officer) | Discretionary sale | 5,930 | $272.10 | $1.6M |
| 2025-08-26 | Cutinho Sunil (Officer) | Discretionary sale | 5,966 | $270.85 | $1.6M |
| 2025-06-25 | SHEPARD WILLIAM R (Director) | Open-market buy | 11 | $270.53 | $3K |
| 2025-06-25 | SHEPARD WILLIAM R (Director) | Open-market buy | 256 | $270.53 | $69K |
| 2025-06-10 | Carey Charles P (Director) | Discretionary sale | 150 | $265.36 | $40K |
| 2025-06-10 | Carey Charles P (Director) | Discretionary sale | 350 | $265.35 | $93K |
| 2025-05-22 | Kaye Daniel G (Director) | Discretionary sale | 500 | $282.42 | $141K |
| 2025-05-20 | Marcus Jonathan L (Officer) | Planned sale (10b5-1) | 390 | $277.50 | $108K |
| 2025-05-19 | Lockett Phyllis M (Director) | Discretionary sale | 1,060 | $277.88 | $295K |
| 2025-05-15 | GEPSMAN MARTIN J (Director) | Discretionary sale | 300 | $273.17 | $82K |
| 2025-05-15 | Carey Charles P (Director) | Discretionary sale | 3,000 | $272.56 | $818K |
| 2025-05-05 | Sammann Derek (Officer) | Discretionary sale | 2,175 | $280.63 | $610K |
| 2025-05-05 | Sammann Derek (Officer) | Discretionary sale | 2,475 | $280.60 | $694K |
| 2025-04-29 | Suskind Dennis (Director) | Discretionary sale | 1,000 | $271.28 | $271K |
| 2025-04-25 | GERDES LARRY G (Director) | Discretionary sale | 2,000 | $266.12 | $532K |
| 2025-04-24 | GERDES LARRY G (Director) | Discretionary sale | 1,000 | $263.10 | $263K |
| 2025-04-24 | GERDES LARRY G (Director) | Discretionary sale | 1,000 | $265.10 | $265K |
| 2025-03-26 | SHEPARD WILLIAM R (Director) | Open-market buy | 12 | $262.62 | $3K |
| 2025-03-26 | SHEPARD WILLIAM R (Director) | Open-market buy | 263 | $262.62 | $69K |
| 2025-03-14 | Lucas Deborah J (Director) | Discretionary sale | 1,500 | $256.95 | $385K |
| 2025-03-13 | SIEGEL HOWARD J (Director) | Discretionary sale | 10K | $260.00 | $2.6M |
| 2025-03-11 | DUFFY TERRENCE A (CEO) | Discretionary sale | 30K | $259.18 | $7.8M |
| 2025-03-03 | Sprague Suzanne (COO) | Discretionary sale | 1,500 | $256.83 | $385K |
| 2025-02-27 | Piell Hilda Harris (Officer) | Discretionary sale | 3,984 | $250.47 | $998K |
| 2025-02-13 | Vroman Ken (Officer) | Discretionary sale | 5,066 | $250.00 | $1.3M |
| 2025-02-13 | Winkler Julie (Officer) | Discretionary sale | 11.6K | $249.17 | $2.9M |
| 2025-01-16 | SHEPARD WILLIAM R (Director) | Open-market buy | 60 | $227.96 | $14K |
| 2025-01-16 | SHEPARD WILLIAM R (Director) | Open-market buy | 60 | $227.96 | $14K |
| 2025-01-16 | SHEPARD WILLIAM R (Director) | Open-market buy | 1,362 | $227.96 | $311K |
| 2025-01-16 | SHEPARD WILLIAM R (Director) | Open-market buy | 1,369 | $227.96 | $312K |
| 2024-12-27 | SHEPARD WILLIAM R (Director) | Open-market buy | 12 | $232.89 | $3K |
| 2024-12-27 | SHEPARD WILLIAM R (Director) | Open-market buy | 264 | $232.89 | $62K |
| 2024-12-27 | Benesh Kathryn (Director) | Open-market buy | 8 | $232.77 | $2K |
| 2024-11-12 | Cook Elizabeth A (Director) | Discretionary sale | 750 | $226.33 | $170K |
“Since trade” compares with the latest insider-implied price, not a market quote; this site carries no market data by design.
Filing hygiene
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.