SEC ownership of CME GROUP INC.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001156375.

Comparable stake leader

VANGUARD CAPITAL MANAGEMENT LLC

Disclosed value leader

BlackRock, Inc.

Comparable rows

50/50

Latest evidence

31 Mar 2026

Top shareholders Insider holders Latest transactions

Public ticker: CME on Nasdaq
Parsed ownership sources: 13D/G and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder: VANGUARD CAPITAL MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
Comparable ownership rows: 50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder: VANGUARD CAPITAL MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date: 31 Mar 2026
Freshness: Most recent filing date in this holder set
Issuer CIK: 0001156375
Issuer location: Chicago, IL

Ownership snapshot

Top shareholders of CME GROUP INC. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

VANGUARD CAPITAL MANAGEME...

Disclosed value leader

BlackRock, Inc.

Comparable rows

50/50

Latest evidence

31 Mar 2026

13D/G 13F Lead comparable stake: 7.4% 13D/G row: VANGUARD CAPITAL MANAGEMENT LLC Showing 1-8 of 50 holder rows.

Quick read

VANGUARD CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 7.4%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens VANGUARD CAPITAL MANAGEMENT LLC's linked filing trail.

Comparable ownership Top 5

VANGUARD CAPITAL MANAGEMENT LLC 7.4%

BlackRock, Inc. 8.7%

STATE STREET CORP 4.4%

JPMORGAN CHASE & CO 3.4%

MORGAN STANLEY 2.6%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
VANGUARD CAPITAL MANAGEMENT LLC	13D/G 13F Vanguard Capital Management · Company 13D/G 13F	7.4%	$7,987,654,803 27,044,709 shares	$0	31 Mar 2026
BlackRock, Inc.	13F Company 13F	8.7%	$9,288,242,644 31,448,257 shares	—	31 Mar 2026
STATE STREET CORP	13F Company 13F	4.4%	$4,741,929,015 16,055,287 shares	—	31 Mar 2026
JPMORGAN CHASE & CO	13F Company 13F	3.4%	$3,633,381,157 12,209,761 shares	—	31 Mar 2026
MORGAN STANLEY	13F Company 13F	2.6%	$2,778,311,853 9,406,843 shares	—	31 Mar 2026
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	2.5%	$2,700,299,074 9,146,888 shares	—	31 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC	13F Company 13F	2.5%	$2,666,800,506 9,029,289 shares	—	31 Mar 2026
Capital World Investors	13F Company 13F	1.9%	$2,048,692,236 6,936,488 shares	—	31 Mar 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$28,695,198.

Buys

$582,781

Insiders: 1

Sells

$29,277,979

Insiders: 12

Net

-$28,695,198

Shares: -99,689

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 2,006 Shares: 101,695

Window (months)	Buy shares	Sell shares	Buy value	Sell value	Net value
0-3	0	40,753	$0	$12,200,402	-$12,200,402
3-6	1,732	14,699	$510,109	$4,562,441	-$4,052,332
6-9	0	33,200	$0	$8,987,144	-$8,987,144
9-12	274	13,043	$72,672	$3,527,993	-$3,455,321

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 40 reporting-owner rows connected to CME GROUP INC.. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

William R. Shepard

Net 12M change

-$28,695,198

Latest report

18 May 2026

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
William R. Shepard	Director	$78,108,935	+$582,781	+0.75%	Filing P/S	26 Mar 2026
William W. Hobert	Director	$48,045,909			Mixed	25 Jun 2025
Howard J. Siegel	Director	$34,027,524			Mixed	25 Jun 2025
Patrick J. Mulchrone	Director	$18,055,436			Mixed	25 Jun 2025
Larry G. Gerdes	Director	$17,643,970			Mixed	24 Apr 2025
Julie Holzrichter	Sr MD Chief Operating Officer	$17,192,178			Mixed	15 Sep 2024
Terrence A. Duffy	Chairman and CEO, Director	$16,665,635	-$17,186,681	-51%	Filing P/S	15 May 2026
Bryan T. Durkin	Director	$13,317,117	-$1,300,530	-8.9%	Filing P/S	23 Feb 2026
Kevin Kometer	Sr MD Chief Information Office	$12,795,625			Mixed	10 Feb 2022
John W. Pietrowicz	Sr MD Chief Financial Officer	$11,182,381			Mixed	15 Sep 2022
Hilda Harris Piell	Sr MD & Chief HR Officer	$8,438,860	-$1,752,536	-17%	Filing P/S	18 May 2026
Kathleen M. Cronin	Sr MD Gen Counsel & Corp Secr	$8,394,377			Mixed	15 Mar 2022
Derek Louis Sammann	Sr MD Gl Hd Commodities Mkts	$7,829,826	-$1,984,798	-20%	Mixed	15 Mar 2026
Martin J. Gepsman	Director	$7,647,194	-$91,770	-1.2%	Filing P/S	20 Feb 2026
Julie Marie Winkler	Sr MD Chief Commercial Officer	$6,628,782			Mixed	15 Mar 2026
Jack J. Tobin	MD Chief Accounting Officer	$6,517,835			Mixed	15 Mar 2026
Robert J. Tierney Jr.	Director	$6,296,419			Mixed	25 Jun 2025
Elizabeth A. Cook	Director	$5,691,247	-$320,000	-5.3%	Mixed	06 Mar 2026
Lynne Fitzpatrick	President and CFO	$5,436,682			Mixed	15 Mar 2026
Timothy S. Bitsberger	Director	$5,285,791			Mixed	25 Jun 2025

Recent insider transactions for CME GROUP INC.

Showing up to 300 recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	SEC-reported value	SEC-reported price	Shares	Shares owned	Date	Ownership
Hilda Harris Piell	CME	Common Stock Class A	Sale	-17.2%	$1,752,536	$304.63	-5,753	27,702	18 May 2026	Direct
Terrence A. Duffy	CME	Common Stock Class A	Sale	-38.6%	$10,447,866	$298.51	-35,000	55,630	15 May 2026	Direct
William R. Shepard	CME	Common Stock Class A	Purchase	2.51%	$18,455	$297.38	62.06	2,539	26 Mar 2026	Direct
William R. Shepard	CME	Common Stock Class A	Purchase	0.54%	$418,646	$297.38	1,408	260,118	26 Mar 2026	by Trust
Jonathan L. Marcus	CME	Common Stock Class A	Sale	-31.4%	$1,031,301	$313.37	-3,291	7,192	17 Mar 2026	Direct
Timothy Francis McCourt	CME	Common Stock Class A	Tax liability	-19.3%			-2,904	12,108	15 Mar 2026	Direct
Timothy Francis McCourt	CME	Common Stock Class A	Award	57.9%			5,504	15,012	15 Mar 2026	Direct
Jonathan L. Marcus	CME	Common Stock Class A	Tax liability	-20.1%			-2,638	10,483	15 Mar 2026	Direct
Jonathan L. Marcus	CME	Common Stock Class A	Award	67.1%			5,270	13,121	15 Mar 2026	Direct
Hilda Harris Piell	CME	Common Stock Class A	Tax liability	-8.33%			-3,039	33,455	15 Mar 2026	Direct
Hilda Harris Piell	CME	Common Stock Class A	Award	24%			7,076	36,494	15 Mar 2026	Direct
Suzanne Sprague	CME	Common Stock Class A	Tax liability	-15.4%			-2,515	13,836	15 Mar 2026	Direct
Suzanne Sprague	CME	Common Stock Class A	Award	50.7%			5,504	16,351	15 Mar 2026	Direct
Terrence A. Duffy	CME	Common Stock Class A	Tax liability	-23.5%			-27,866	90,630	15 Mar 2026	Direct
Terrence A. Duffy	CME	Common Stock Class A	Award	113.2%			62,902	118,496	15 Mar 2026	Direct
Ken Vroman	CME	Common Stock Class A	Tax liability	-14.3%			-3,135	18,851	15 Mar 2026	Direct
Ken Vroman	CME	Common Stock Class A	Award	47.5%			7,076	21,986	15 Mar 2026	Direct
Julie Marie Winkler	CME	Common Stock Class A	Tax liability	-10.8%			-3,658	30,110	15 Mar 2026	Direct
Julie Marie Winkler	CME	Common Stock Class A	Award	32.4%			8,256	33,768	15 Mar 2026	Direct
Derek Louis Sammann	CME	Common Stock Class A	Tax liability	-21.4%			-3,627	13,312	15 Mar 2026	Direct
Derek Louis Sammann	CME	Common Stock Class A	Award	95.1%			8,256	16,939	15 Mar 2026	Direct
Lynne Fitzpatrick	CME	Common Stock Class A	Tax liability	-9.52%			-2,515	23,913	15 Mar 2026	Direct
Lynne Fitzpatrick	CME	Common Stock Class A	Award	26.3%			5,504	26,428	15 Mar 2026	Direct
Jack J. Tobin	CME	Common Stock Class A	Tax liability	-0.7%			-179	25,409	15 Mar 2026	Direct
Jack J. Tobin	CME	Common Stock Class A	Award	2.43%			608	25,588	15 Mar 2026	Direct
Sunil Kiran Cutinho	CME	Common Stock Class A	Tax liability	-13.4%			-3,658	23,586	15 Mar 2026	Direct
Sunil Kiran Cutinho	CME	Common Stock Class A	Award	43.5%			8,256	27,244	15 Mar 2026	Direct
Ken Vroman	CME	Common Stock Class A	Sale	-25.7%	$1,594,440	$309.00	-5,160	14,910	12 Mar 2026	Direct
Jack J. Tobin	CME	Common Stock Class A	Gift	-0.42%			-105	24,980	11 Mar 2026	Direct
Elizabeth A. Cook	CME	Common Stock Class A	Sale	-5.33%	$320,000	$320.00	-1,000	17,771	06 Mar 2026	by Trust
Bryan T. Durkin	CME	Common Stock Class A	Sale	-8.9%	$1,300,530	$309.65	-4,200	43,007	23 Feb 2026	Direct
Martin J. Gepsman	CME	Common Stock Class A	Sale	-1.19%	$91,770	$305.90	-300	24,999	20 Feb 2026	Direct
Dennis Suskind	CME	Common Stock Class A	Sale	-21.7%	$224,400	$300.00	-748	2,699	06 Feb 2026	Direct
Terrence A. Duffy	CME	Common Stock Class A	Tax liability	-15.5%			-10,210	55,594	31 Dec 2025	Direct
William R. Shepard	CME	Common Stock Class A	Purchase	0.1%	$69,929	$278.37	251	258,710	30 Dec 2025	by Trust
William R. Shepard	CME	Common Stock Class A	Purchase	0.45%	$3,079	$278.37	11.06	2,477	30 Dec 2025	Direct
Terrence A. Duffy	CME	Common Stock Class A	Sale	-27.5%	$6,738,815	$269.55	-25,000	65,804	11 Dec 2025	Direct
Derek Louis Sammann	CME	Common Stock Class A	Sale	-15.8%	$362,322	$275.74	-1,314	7,022	20 Nov 2025	by Spouse
Derek Louis Sammann	CME	Common Stock Class A	Sale	-34.8%	$1,622,476	$275.65	-5,886	11,028	20 Nov 2025	by Trust
Hilda Harris Piell	CME	Common Stock Class A	Gift	-3.2%			-973	29,418	07 Nov 2025	Direct
Derek Louis Sammann	CME	Common Stock Class A	Other	15.7%			2,300	16,914	06 Nov 2025	by Trust
Derek Louis Sammann	CME	Common Stock Class A	Other	-20.9%			-2,300	8,683	06 Nov 2025	Direct
Harold Eugene Ford Jr.	CME	Common Stock Class A	Sale	-47.8%	$263,530	$263.53	-1,000	1,091	03 Nov 2025	Direct
William R. Shepard	CME	Common Stock Class A	Purchase	0.47%	$3,069	$265.22	11.57	2,466	25 Sep 2025	Direct
William R. Shepard	CME	Common Stock Class A	Purchase	0.1%	$69,603	$265.19	262	258,459	25 Sep 2025	by Trust
Jonathan L. Marcus	CME	Common Stock Class A	Sale	-4.76%	$102,704	$262.00	-392	7,851	18 Sep 2025	Direct
Sunil Kiran Cutinho	CME	Common Stock Class A	Tax liability	-1.96%			-379	18,988	16 Sep 2025	Direct
Julie Marie Winkler	CME	Common Stock Class A	Tax liability	-1.46%			-379	25,512	16 Sep 2025	Direct
Ken Vroman	CME	Common Stock Class A	Tax liability	-1.59%			-325	20,070	16 Sep 2025	Direct
Jonathan L. Marcus	CME	Common Stock Class A	Tax liability	-3.44%			-294	8,243	16 Sep 2025	Direct

^* marks a reported price that did not pass the local price check.