CME CME Group Inc

NASDAQ
$272.46

CME Group Inc (CME) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with CME's own trailing one-year pace, with 7% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 1 buyer in the last 90 days 2 sellers in the last 90 days
Insiders buying
1
8 transactions
Insiders selling
11
21 transactions
Purchases
$661.0K
2,345 shares
Sales
$31.4M
108,590 shares
Net activity
-$30.7M
purchases less sales

How much of that selling was preplanned? 7% planned / 93% discretionary

10b5-1 plan sales $2.3M 4 transactions · 7,350 shares
Discretionary sales $29.1M 17 transactions · 101,240 shares

Largest single sale: $7.8M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: June 25, 2026 , by SHEPARD WILLIAM R .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Cook Elizabeth A Director Sell 500 $280.11 $140.1K 17,916 −2.7% of holding
DUFFY TERRENCE A 2 fills Chairman and CEO Sell 15,000 $274.44 $4.1M 41,258 −26.7% of holding
SHEPARD WILLIAM R 2 fills Director Buy 339 $230.57 $78.2K 260,442
Piell Hilda Harris Sr MD & Chief HR Officer Sell 5,753 $304.63 $1.8M 27,702 −17.2% of holding
DUFFY TERRENCE A 2 fills Chairman and CEO Sell 35,000 $298.51 $10.4M 64,634 −35.1% of holding
SHEPARD WILLIAM R 2 fills Director Buy 1,470 $297.38 $437.1K 260,118
Marcus Jonathan L 2 fills Sr MD General Counsel Sell 10b5-1 6,582 $323.37 $2.1M 7,192 −47.8% of holding
Vroman Ken Chief Transformation Officer Sell 5,160 $309.00 $1.6M 14,910 −25.7% of holding
Cook Elizabeth A Director Sell 1,000 $320.00 $320.0K 17,771 −5.3% of holding
Durkin Bryan T Director Sell 4,200 $309.65 $1.3M 43,007 −8.9% of holding
GEPSMAN MARTIN J Director Sell 300 $305.90 $91.8K 24,999 −1.2% of holding
Suskind Dennis Director Sell 748 $300.00 $224.4K 2,699 −21.7% of holding
SHEPARD WILLIAM R 2 fills Director Buy 262 $278.37 $73.0K 258,710
DUFFY TERRENCE A 2 fills Chairman and CEO Sell 25,000 $269.55 $6.7M 77,715 −24.3% of holding
Sammann Derek 2 fills Sr MD Gl Hd Commodities Mkts Sell 7,200 $275.67 $2.0M 11,028 −39.5% of holding
Ford Harold Eugene Jr. Director Sell 1,000 $263.53 $263.5K 1,091 −47.8% of holding
SHEPARD WILLIAM R 2 fills Director Buy 274 $265.19 $72.7K 258,459
Marcus Jonathan L Sr MD General Counsel Sell 10b5-1 392 $262.00 $102.7K 7,851 −4.8% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.