CME Group · Insider Trading

Last 365 days · Open-market buys and sells by officers and directors · Same-day, same-person, same-direction trades combined · Amounts in USD millions← CME

Buy

2 · $0.52M

Sell

5 · $17.5M

Net

−$17.0M

By Insider

Name	Title	Buy	Sell	Latest Trade
DUFFY TERRENCE A	Chairman and CEO	—	50,000 shares · $14.6M	2026-09-10
Piell Hilda Harris	Sr MD & Chief HR Officer	—	5,753 shares · $1.8M	2026-05-18
Marcus Jonathan L	Sr MD General Counsel	—	3,291 shares · $1.0M	2026-03-17
SHEPARD WILLIAM R	—	1,808.94 shares · $0.52M	—	2026-06-25
Cook Elizabeth A	—	—	500 shares · $0.14M	2026-09-14

All Trades

Date	Name	Title	Side	Shares	Trades	Avg Price	Value
2026-09-14	Cook Elizabeth A	Director	Sell	500	1	280.11	$0.14M
2026-09-10	DUFFY TERRENCE A	Chairman and CEO	Sell	15,000	2	274.44	$4.1M
2026-06-25	SHEPARD WILLIAM R	Director	Buy	339.1	2	230.57	$0.08M
2026-05-18	Piell Hilda Harris	Sr MD & Chief HR Officer	Sell	5,753	1	304.63	$1.8M
2026-05-15	DUFFY TERRENCE A	Chairman and CEO	Sell	35,000	2	298.51	$10.4M
2026-03-26	SHEPARD WILLIAM R	Director	Buy	1,469.84	2	297.38	$0.44M
2026-03-17	Marcus Jonathan L	Sr MD General Counsel	Sell	3,291	1	313.37	$1.0M

Data comes from insiders' SEC ownership filings (Form 4). Only open-market purchases (P) and sales (S) are counted; option exercises, grants, tax withholding and other non-trading changes are excluded.