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CMECME Group · Insider ownership research

CME Group insiders sold $30.0M in the past 12 months. How much of their stake is that?

About 10% overall. As a group they ended with more shares than they started with. The biggest individual seller, Terrence Duffy, gave up 83% of starting holdings.

Updated Oct 9, 2026 from SEC filings · covers Oct 10, 2025 to Oct 9, 2026
How this comparesMore of their stake sold than at 343 of the 490 other companies we can measure (#148 of 491)See ranking
1
buyer among officers and directors (7 trades), past 12 months
3.4%
of sales were under disclosed trading plans, past 12 months
10 of 32
officers and directors sold shares, past 12 months
Recent activity · past 30 days, Sep 10, 2026 to Oct 9, 2026
Sep 25, 2026William Shepard bought 293 shares ($79K). The total stake went from 264K to 264K shares that day.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
William Shepard
Director
293$268.76n/a264KSep 25, 2026Sep 28, 2026

"% of total stake" is the shares in this event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings don't reconcile, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Sep 16, 202610 executives had 2.8K shares ($759K) withheld by the company for taxes (not a market sale). That is between 0.2% and 2.7% of each person's total stake held that day.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Timothy McCourt
Sr MD Global Head Equity & FX
364$272.462.7%13KSep 16, 2026Sep 17, 2026
Derek Sammann
Sr MD Gl Hd Commodities Mkts
359$272.461.1%33KSep 16, 2026Sep 17, 2026
Julie Winkler
Sr MD Chief Commercial Officer
359$272.461.1%32KSep 16, 2026Sep 17, 2026
Lynne Fitzpatrick
President and CFO
359$272.461.3%27KSep 16, 2026Sep 17, 2026
Sunil Cutinho
Chief Information Officer
359$272.461.4%25KSep 16, 2026Sep 17, 2026
Ken Vroman
Chief Transformation Officer
308$272.461.5%20KSep 16, 2026Sep 17, 2026
Suzanne Sprague
COO & Global Head of Clearing
308$272.461.9%16KSep 16, 2026Sep 17, 2026
Michael Dennis
Global Head of Fixed Income
274$272.462.5%11KSep 16, 2026Sep 17, 2026
Jack Tobin
MD Chief Accounting Officer
51$272.460.2%26KSep 16, 2026Sep 17, 2026
John Marchese
Sr MD, General Counsel
44$272.461.2%3.6KSep 16, 2026Sep 17, 2026

"% of total stake" is the shares in this event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings don't reconcile, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Sep 15, 202610 executives had 7.6K shares ($2.1M) withheld by the company for taxes (not a market sale). That is between 1.1% and 6.6% of each person's total stake held that day. 25K shares came in from vesting or option exercises the same day, so their combined holdings rose by 17K net.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Derek Sammann
Sr MD Gl Hd Commodities Mkts
1,054$275.093.1%33KSep 15, 2026Sep 17, 2026
Julie Winkler
Sr MD Chief Commercial Officer
1,054$275.093.2%32KSep 15, 2026Sep 17, 2026
Sunil Cutinho
Chief Information Officer
1,054$275.094.0%25KSep 15, 2026Sep 17, 2026
Lynne Fitzpatrick
President and CFO
981$275.093.5%27KSep 15, 2026Sep 17, 2026
Timothy McCourt
Sr MD Global Head Equity & FX
970$275.096.6%14KSep 15, 2026Sep 17, 2026
Ken Vroman
Chief Transformation Officer
903$275.094.2%21KSep 15, 2026Sep 17, 2026
Suzanne Sprague
COO & Global Head of Clearing
844$275.095.1%16KSep 15, 2026Sep 17, 2026
Jack Tobin
MD Chief Accounting Officer
296$275.091.1%26KSep 15, 2026Sep 17, 2026
Michael Dennis
Global Head of Fixed Income
274$275.092.4%11KSep 15, 2026Sep 17, 2026
John Marchese
Sr MD, General Counsel
197$275.095.1%3.6KSep 15, 2026Sep 17, 2026

"% of total stake" is the shares in this event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings don't reconcile, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Sep 14, 2026Elizabeth Cook sold 500 shares ($140K) with no plan disclosed. That is 2.7% of the total stake held that day.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Elizabeth Cook
Director
500$280.112.7%18KSep 14, 2026Sep 14, 2026

"% of total stake" is the shares in this event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings don't reconcile, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Sep 10, 2026Terrence Duffy sold 15K shares ($4.1M) with no plan disclosed. That is 27% of the total stake held that day.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Terrence Duffy
Chairman and CEO, Director
15,000$274.4427%41KSep 10, 2026Sep 11, 2026

"% of total stake" is the shares in this event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings don't reconcile, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Is this normal? In line with the past 5 years. 10 insiders sold; the average is 14 a year. Year by year
Latest filing: Filed Sep 28 for a purchase on Sep 25. William Shepard bought 293 shares ($79K). Filing
61 SEC ownership filings in the period · See the evidence

What stands out

Three officers sold more than 25% of vested holdings: Terrence Duffy (83% of holdings, $21.3M, none under a disclosed plan), Ken Vroman (26% of holdings, $1.6M, none under a disclosed plan) and Jonathan Marcus (42% of holdings, $1.0M, all under a disclosed plan).Terrence Duffy: largest sale, May 15, 2026 · Ken Vroman: largest sale, Mar 12, 2026 · Jonathan Marcus: largest sale, Mar 17, 2026
Three insiders sold $5.0M with no disclosed plan: Derek Sammann ($2.0M, 21% of holdings), Hilda Piell ($1.8M, 19%) and Bryan Durkin ($1.3M, 8.9%). The filings don't state a reason.Derek Sammann: largest such sale, Nov 20, 2025 · Hilda Piell: largest such sale, May 18, 2026 · Bryan Durkin: largest such sale, Feb 23, 2026
Two directors sold shares but ended with larger stakes, because more shares came in than were sold: Harold Ford Jr. (sold 1K, 48% of starting holdings; 1.1K added) and Martin Gepsman (sold 300, 1.2% of starting holdings; 645 added).Harold Ford Jr.: largest sale, Nov 3, 2025 · Martin Gepsman: largest sale, Feb 20, 2026

Percentages cover 30 of 32 officers and directors. Left out: Elizabeth Cook (most holdings were last confirmed in 2019); Charles Carey (most holdings were last confirmed in 2017). Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Each bar is 100% of that person's own stake; not comparable between people. The stake is the vested shares held at the start of the period (Oct 9, 2025); the gold part is what they sold.

SoldRest of starting stake
Terrence Duffy
Chairman and CEO, Director
83% · $21.3MNo plan disclosed
Derek Sammann
Sr MD Gl Hd Commodities Mkts
21% · $2.0MNo plan disclosed
Hilda Piell
Sr MD & Chief HR Officer
19% · $1.8MNo plan disclosed
Ken Vroman
Chief Transformation Officer
26% · $1.6MNo plan disclosed
Bryan Durkin
Director
8.9% · $1.3MNo plan disclosed
All 10 sellers

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planNo plan disclosedOne dollar scale for every month; the tallest bar is labeled
OctNov 2025: $2.2M no plan disclosedNovDec 2025: $6.7M no plan disclosedDecJanFeb 2026: $1.6M no plan disclosedFebMar 2026: $1.0M under a disclosed planMar 2026: $1.9M no plan disclosedMarAprMay 2026: $12.2M no plan disclosed$12.2MMayJunJulAugSep 2026: $4.3M no plan disclosedSepOct

Common questions

Is the CME Group CEO selling stock?

Yes. Terrence Duffy sold 75K shares ($21.3M, 83% of starting holdings) in the past 12 months, none of it under a trading plan disclosed in the filings.

Why are CME Group insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 3% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 97% had no disclosed plan. A trading plan schedules sales in advance.

Are any CME Group insiders buying?

Yes. 1 officer or director reported 7 purchases in the past 12 months (Form 4 code P, which includes private purchases).

How much of their stake did CME Group insiders sell?

About 10% overall. As a group they ended with more shares than they started with. The biggest individual seller, Terrence Duffy, gave up 83% of starting holdings. That covers the 12 months to Oct 9, 2026 and counts vested shares reported on SEC Forms 3, 4 and 5, which is not an insider's whole wealth.

The evidence

Who sold10 officers and directors: amount, % of holdings, trading plan
Who soldAmount% of holdingsTrading plan
Terrence Duffy
Chairman and CEO, Director
$21.3M
75K shares
83%No plan disclosed
Derek Sammann
Sr MD Gl Hd Commodities Mkts
$2.0M
7.2K shares
21%No plan disclosed
Hilda Piell
Sr MD & Chief HR Officer
$1.8M
5.8K shares
19%No plan disclosed
Ken Vroman
Chief Transformation Officer
$1.6M
5.2K shares
26%No plan disclosed
Bryan Durkin
Director
$1.3M
4.2K shares
8.9%No plan disclosed
Jonathan Marcus
Sr MD General Counsel
$1.0M
3.3K shares
42%Disclosed plan
Elizabeth Cook
Director
$460K
1.5K shares
i
No percentage: most holdings were last confirmed in 2019.
No plan disclosed
Harold Ford Jr.
Director
$264K
1K shares
48%No plan disclosed
Dennis Suskind
Director
$224K
748 shares
22%No plan disclosed
Martin Gepsman
Director
$92K
300 shares
1.2%No plan disclosed
The full ownership picture32 of 32 insiders fully reconciled · 32 officers and directors

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

InsiderHeld Oct 9, 2025SoldHeld Oct 9, 2026Still held
William Shepard
i
Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Director
261K0264Kno sales
Vesting, gifts, unvested awards and holding lines for William Shepard
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A2,4661,067
TrustCommon Stock Class A258,459263,289

Additional holdings last reported Dec 31, 2017, not confirmed since: 68 shares. Not included in any total or percentage on this page.

William Hobert
i
Minor difference of 21 shares. Difference is under 0.5% of holdings. In-kind distributions to the fund's own investors are labeled as distributions, not sales. Additional holdings last reported more than 3 years ago are shown separately and excluded from totals. New Form 3 filed 2018-05-31; earlier filings set aside.
Director
127K0128Kno sales
Vesting, gifts, unvested awards and holding lines for William Hobert
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • In-kind distributions to the fund's own investors are labeled as distributions, not sales.
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
  • New Form 3 filed 2018-05-31; earlier filings set aside.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A86,598108,006
FirmCommon Stock Class A40,00019,680

Additional holdings last reported May 23, 2018, not confirmed since: 15 shares. Not included in any total or percentage on this page.

Reconciliation: minor difference of 21 shares. Difference is under 0.5% of holdings.

Terrence Duffy
Chairman and CEO, Director
91K−75K62K69%
Vesting, gifts, unvested awards and holding lines for Terrence Duffy
0shares vested or exercised
0gifted (net of own trusts)
−38Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A90,80462,442
Howard Siegel
Director
70K071Kno sales
Vesting, gifts, unvested awards and holding lines for Howard Siegel
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A47,79148,858
TrustCommon Stock Class A21,87321,873
Patrick Mulchrone
i
Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Director
53K054Kno sales
Vesting, gifts, unvested awards and holding lines for Patrick Mulchrone
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A28,48529,130
SpouseCommon Stock Class A25,00025,000

Additional holdings last reported May 6, 2020, not confirmed since: 4 shares. Not included in any total or percentage on this page.

Bryan Durkin
Director
47K−4.2K44K92%
Vesting, gifts, unvested awards and holding lines for Bryan Durkin
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A47,20743,652
Larry Gerdes
Director
37K037Kno sales
Vesting, gifts, unvested awards and holding lines for Larry Gerdes
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A36,65136,651
Derek Sammann
i
Additional holdings last reported more than 3 years ago are shown separately and excluded from totals. New Form 3 filed 2014-09-15; earlier filings set aside.
Sr MD Gl Hd Commodities Mkts
34K−7.2K33K97%
Vesting, gifts, unvested awards and holding lines for Derek Sammann
0shares vested or exercised
0gifted (net of own trusts)
−5Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
  • New Form 3 filed 2014-09-15; earlier filings set aside.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A10,98310,134
TrustCommon Stock Class A14,61415,657
SpouseCommon Stock Class A8,3367,022

Additional holdings last reported Sep 10, 2014, not confirmed since: 21,299 shares. Not included in any total or percentage on this page.

Hilda Piell
Sr MD & Chief HR Officer
30K−5.8K28K91%
Vesting, gifts, unvested awards and holding lines for Hilda Piell
0shares vested or exercised
−973gifted (net of own trusts)
−3Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A30,39127,702
Julie Winkler
Sr MD Chief Commercial Officer
26K032Kno sales
Vesting, gifts, unvested awards and holding lines for Julie Winkler
0shares vested or exercised
0gifted (net of own trusts)
−5.1Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A25,51231,561
Martin Gepsman
Director
25K−30026K+1.4%
Vesting, gifts, unvested awards and holding lines for Martin Gepsman
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A25,29925,644
Jack Tobin
MD Chief Accounting Officer
25K026Kno sales
Vesting, gifts, unvested awards and holding lines for Jack Tobin
0shares vested or exercised
−105gifted (net of own trusts)
−526withheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A25,08525,762
Lynne Fitzpatrick
President and CFO
21K027Kno sales
Vesting, gifts, unvested awards and holding lines for Lynne Fitzpatrick
0shares vested or exercised
0gifted (net of own trusts)
−3.9Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A20,92426,661
Ken Vroman
i
New Form 3 filed 2020-02-13; earlier filings set aside.
Chief Transformation Officer
20K−5.2K20K+0.8%
Vesting, gifts, unvested awards and holding lines for Ken Vroman
0shares vested or exercised
0gifted (net of own trusts)
−4.3Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • New Form 3 filed 2020-02-13; earlier filings set aside.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A20,07020,232
Sunil Cutinho
Chief Information Officer
19K025Kno sales
Vesting, gifts, unvested awards and holding lines for Sunil Cutinho
0shares vested or exercised
0gifted (net of own trusts)
−5.1Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A18,98825,037
Elizabeth Cook
!
Most of this insider's holdings were last confirmed in 2019. Confirmed in the last three years: 17,936 shares. Not confirmed since: 20,822 shares, left out of this row. "Still held" is not shown because it would cover only the smaller, confirmed part.
Director
19K−1.5K18Ksee note
Vesting, gifts, unvested awards and holding lines for Elizabeth Cook
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Held throughShare classOct 9, 2025Oct 9, 2026
TrustCommon Stock Class A18,77117,916
Joint AccountCommon Stock Class A2020

Additional holdings last reported Jun 10, 2019, not confirmed since: 20,822 shares. Not included in any total or percentage on this page.

Robert Tierney Jr.
i
Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Director
14K014Kno sales
Vesting, gifts, unvested awards and holding lines for Robert Tierney Jr.
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A13,70014,345

Additional holdings last reported May 8, 2019, not confirmed since: 4 shares. Not included in any total or percentage on this page.

Timothy Bitsberger
Director
11K012Kno sales
Vesting, gifts, unvested awards and holding lines for Timothy Bitsberger
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A11,12111,766
Suzanne Sprague
COO & Global Head of Clearing
11K016Kno sales
Vesting, gifts, unvested awards and holding lines for Suzanne Sprague
0shares vested or exercised
0gifted (net of own trusts)
−3.7Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A10,84715,548
Timothy McCourt
Sr MD Global Head Equity & FX
9.5K013Kno sales
Vesting, gifts, unvested awards and holding lines for Timothy McCourt
0shares vested or exercised
0gifted (net of own trusts)
−4.2Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A9,50813,366
Michael Dennis
Global Head of Fixed Income
8.7K011Kno sales
Vesting, gifts, unvested awards and holding lines for Michael Dennis
0shares vested or exercised
0gifted (net of own trusts)
−548withheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A8,63810,682
SpouseCommon Stock Class A4141
Jonathan Marcus
Sr MD General Counsel
7.9K−3.3K7.2K92%
Vesting, gifts, unvested awards and holding lines for Jonathan Marcus
0shares vested or exercised
0gifted (net of own trusts)
−2.6Kwithheld by the company for taxes
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A7,8517,192
Charles Carey
!
Most of this insider's holdings were last confirmed in 2017. Confirmed in the last three years: 7,031 shares. Not confirmed since: 10,617 shares, left out of this row. "Still held" is not shown because it would cover only the smaller, confirmed part.
Director
6K07Ksee note
Vesting, gifts, unvested awards and holding lines for Charles Carey
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Held throughShare classOct 9, 2025Oct 9, 2026
TrustCommon Stock Class A5,7796,846
FirmCommon Stock Class A185185
PartnershipCommon Stock Class A00

Additional holdings last reported Jun 26, 2017, not confirmed since: 10,617 shares. Not included in any total or percentage on this page.

Daniel Kaye
Director
4.2K04.8Kno sales
Vesting, gifts, unvested awards and holding lines for Daniel Kaye
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A4,2004,845
Patrick Maloney
i
Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Director
4.1K04.7Kno sales
Vesting, gifts, unvested awards and holding lines for Patrick Maloney
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A4,0984,743

Additional holdings last reported May 6, 2020, not confirmed since: 1 shares. Not included in any total or percentage on this page.

Rahael Seifu
Director
4.1K04.7Kno sales
Vesting, gifts, unvested awards and holding lines for Rahael Seifu
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A4,0944,739
Deborah Lucas
Director
3.9K04.5Kno sales
Vesting, gifts, unvested awards and holding lines for Deborah Lucas
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A3,8884,533
Phyllis Lockett
Director
3.6K04.3Kno sales
Vesting, gifts, unvested awards and holding lines for Phyllis Lockett
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A3,6404,285
Dennis Suskind
i
Includes unvested RSUs, amount not disclosed.
Director
3.4K−7483.3K97%
Vesting, gifts, unvested awards and holding lines for Dennis Suskind
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock Class A3,4473,344
John Marchese
i
Started reporting during the period; starting holdings are from the Form 3.
Sr MD, General Counsel
3.1K03.6Kno sales
Vesting, gifts, unvested awards and holding lines for John Marchese
0shares vested or exercised
0gifted (net of own trusts)
−241withheld by the company for taxes
none reportedunvested awards, start → end
  • Started reporting during the period; starting holdings are from the Form 3.
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A3,0553,598
Kathryn Benesh
Director
2.1K02.8Kno sales
Vesting, gifts, unvested awards and holding lines for Kathryn Benesh
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A2,1072,752
Harold Ford Jr.
Director
2.1K−1K2.2K+3.2%
Vesting, gifts, unvested awards and holding lines for Harold Ford Jr.
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock Class A2,0912,158

32 of 32 insiders fully reconciled: starting holdings plus reported transactions match ending holdings (31 exactly, 1 with a minor or footnoted difference). Percentages cover 30 of 32 officers and directors. Left out: Elizabeth Cook (most holdings were last confirmed in 2019); Charles Carey (most holdings were last confirmed in 2017). "Still held" compares ending with starting vested shares; a plus sign means the holding grew.

What explains the selling$30.0M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $30.0M across 104,152 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

The lighter segment is sales with no plan disclosed in the filing ($29.0M), including tax-related sales outside a plan.

No plan disclosed · $29.0M

Sales with no 10b5-1 plan and no tax reference in the filing. $21.3M of it is Terrence Duffy. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Terrence Duffy, May 15, 2026

Taxes

76,356 shares ($23.0M) were withheld by the company for taxes, which isn't a market sale.

Purchases · 1 buyer (7 trades)

1 officer or director bought shares in this period, in 7 trades(Form 4 code P). Across all their filings on record there are 71 purchase trades.

Charitable gifts · 973 shares

Gifts the filings describe as charitable. Gifts are not sales and are not included in the sale totals.

SellerShares soldProceedsUnder a disclosed planShare of totalSales dates
Terrence Duffy
Chairman and CEO, Director
75K$21.3M0%71%Dec 11, 2025 to Sep 10, 2026
Derek Sammann
Sr MD Gl Hd Commodities Mkts
7.2K$2.0M0%7%Nov 20, 2025 to Nov 20, 2025
Hilda Piell
Sr MD & Chief HR Officer
5.8K$1.8M0%6%May 18, 2026 to May 18, 2026
Ken Vroman
Chief Transformation Officer
5.2K$1.6M0%5%Mar 12, 2026 to Mar 12, 2026
Bryan Durkin
Director
4.2K$1.3M0%4%Feb 23, 2026 to Feb 23, 2026
Jonathan Marcus
Sr MD General Counsel
3.3K$1.0M100%3%Mar 17, 2026 to Mar 17, 2026
Elizabeth Cook
Director
1.5K$460K0%2%Mar 6, 2026 to Sep 14, 2026
Harold Ford Jr.
Director
1K$264K0%0.9%Nov 3, 2025 to Nov 3, 2025
Dennis Suskind
Director
748$224K0%0.7%Feb 6, 2026 to Feb 6, 2026
Martin Gepsman
Director
300$92K0%0.3%Feb 20, 2026 to Feb 20, 2026

Sales by month

MonthSale proceedsDisclosed planTo cover taxesNo plan disclosed
Oct 2025$0$0$0$0
Nov 2025$2.2M$0$0$2.2M
Dec 2025$6.7M$0$0$6.7M
Jan 2026$0$0$0$0
Feb 2026$1.6M$0$0$1.6M
Mar 2026$2.9M$1.0M$0$1.9M
Apr 2026$0$0$0$0
May 2026$12.2M$0$0$12.2M
Jun 2026$0$0$0$0
Jul 2026$0$0$0$0
Aug 2026$0$0$0$0
Sep 2026$4.3M$0$0$4.3M
Oct 2026$0$0$0$0
Is this normal? Selling year by year5 earlier years to compare with

In line with the past 5 years. 10 insiders sold; the average is 14 a year.

12 months endingShares soldInsiders who soldProceeds
Oct 9, 2026
Latest 12 months
104K10$30.0M
Oct 9, 2025
1 year earlier
100K19$25.9M
Oct 9, 2024
2 years earlier
85K12$18.1M
Oct 10, 2023
3 years earlier
68K8$13.8M
Oct 10, 2022
4 years earlier
79K16$17.9M
Oct 10, 2021
5 years earlier
123K15$24.5M

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertaintyEvery officer and director reconciles

Every officer and director reconciles for this period.

William Hobert: minor difference of 21 shares. Difference is under 0.5% of holdings.

Inferred rename: "Rev. Living Trust" is treated as the same holder as "in Trust", because the old name was never reported again and the new one opened with the same balance (6,565 shares). Old name, new name

Inferred rename: "in Trust" is treated as the same holder as "Trust", because the old name was never reported again and the new one opened with the same balance (12,885 shares). Old name, new name

Inferred rename: "Milton Glickman Trust" is treated as the same holder as "M Glickman Trust", because the old name was never reported again and the new one opened with the same balance (2,100 shares). Old name, new name

Inferred rename: "M Glickman Trust" is treated as the same holder as "Trust", because the old name was never reported again and the new one opened with the same balance (2,100 shares). Old name, new name

Inferred rename: "J. Salatich Trst" is treated as the same holder as "W. Salatich Jr. Trst", because the old name was never reported again and the new one opened with the same balance (27,180 shares). Old name, new name

Inferred rename: "WH Trading LLC" is treated as the same holder as "Firm", because the old name was never reported again and the new one opened with the same balance (40,000 shares). Old name, new name

Inferred rename: the share class "Common Stock" is treated as the same class as "Common Stock Class A" on 1 holding line, because the old title was never reported again on those lines and each balance carried over exactly. Example (James Oliff, 1,500 shares): old title, new title

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology2,213 filings from SEC EDGAR, and how we read them

All 2,213 Forms 3, 4 and 5 filed for CME Group (SEC CIK 1156375) from Jun 10, 2003 to Sep 28, 2026, retrieved from SEC EDGAR on Oct 9, 2026. Prices are the ones reported in each filing, often weighted averages. 1 filing was left out because CME Group filed them as an owner of another company's stock.

Probable 5-for-1 stock split on or before Jul 30, 2012 (first filing that shows post-split balances). Splits aren't reported as transactions; 33 holding lines changed by exactly this ratio, so earlier share counts are restated.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (63)No filing in 18 months; last reported balances, not in any total
NameLast filedLast reported balance
Julie HolzrichterSep 17, 202440,437 shares, last reported balance as of Sep 16, 2024
Terry SavageJun 26, 202427,754 shares, last reported balance as of Jun 25, 2024
Daniel GlickmanJun 26, 202418,956 shares, last reported balance as of Jun 25, 2024
Sean TullyDec 19, 202222,087 shares, last reported balance as of Dec 15, 2022
John PietrowiczSep 19, 202290,606 shares, last reported balance as of Sep 16, 2022
Dennis ChookaszianJun 29, 202217,040 shares, last reported balance as of Jun 27, 2022
Ana DutraJun 29, 20227,176 shares, last reported balance as of Jun 27, 2022
Kathleen CroninMar 17, 202245,466 shares, last reported balance as of Mar 15, 2022
Kevin KometerFeb 14, 202263,207 shares, last reported balance as of Feb 10, 2022
Ronald PankauFeb 28, 20203,911 shares, last reported balance as of Nov 7, 2019
Yra HarrisSep 27, 20192,386 shares, last reported balance as of Sep 25, 2019
Alex PollockJun 27, 201922,568 shares, last reported balance as of Jun 25, 2019
David WescottJun 27, 201975,863 shares, last reported balance as of Jun 25, 2019
Gedon HertshtenJun 27, 2019135,769 shares, last reported balance as of Jun 25, 2019
Jeffrey BernacchiFeb 27, 201942,009 shares, last reported balance as of Feb 26, 2019
Michael SpencerFeb 14, 20193,010,283 shares, last reported balance as of Nov 2, 2018
John SandnerFeb 8, 2018624,293 shares, last reported balance as of Oct 20, 2017
Leo MelamedFeb 7, 201826,302 shares, last reported balance as of Feb 5, 2018
Kimberly TaylorDec 4, 2017166,865 shares, last reported balance as of Nov 30, 2017
Phupinder GillSep 21, 2016134,572 shares, last reported balance as of Sep 19, 2016
Robert ZagottaSep 19, 201616,240 shares, last reported balance as of Sep 16, 2016
James OliffJul 19, 201675,950 shares, last reported balance as of Jul 15, 2016
William Miller IIJun 29, 201613,024 shares, last reported balance as of Jun 27, 2016
Jill HarleyMar 18, 201521,676 shares, last reported balance as of Mar 16, 2015
James ParisiSep 17, 201448,353 shares, last reported balance as of Sep 16, 2014
Bruce JohnsonAug 27, 2014107,338 shares, last reported balance as of Aug 25, 2014
Dennis HastertAug 27, 20149,235 shares, last reported balance as of Aug 25, 2014
Steven WollackAug 27, 20143,380 shares, last reported balance as of Aug 25, 2014
Odom C C IIMay 22, 20143 shares, last reported balance as of May 21, 2014
James PieperMar 18, 20144,769 shares, last reported balance as of Mar 15, 2014
Jackie CleggMar 17, 20146,947 shares, last reported balance as of Mar 12, 2014
Linda RichNov 26, 20138,039 shares, last reported balance as of Nov 22, 2013
James DonaldsonNov 15, 201320,093 shares, last reported balance as of Nov 13, 2013
Laurent PaulhacSep 17, 201316,715 shares, last reported balance as of Sep 16, 2013
Scot WarrenSep 17, 201331,772 shares, last reported balance as of Sep 16, 2013
Joseph NiciforoJun 27, 201328,088 shares, last reported balance as of Jun 25, 2013
Mark CermakJun 27, 201326,371 shares, last reported balance as of Jun 25, 2013
Christopher StewartJun 27, 20138,411 shares, last reported balance as of Jun 25, 2013
Gary KatlerFeb 11, 20131,000 shares, last reported balance as of Feb 8, 2013
Craig DonohueMay 2, 2012410,360 shares, last reported balance as of Apr 30, 2012
John PietrzakJul 5, 2011104,767 shares, last reported balance as of Jun 29, 2011
Robert CorvinoJun 29, 201113,841 shares, last reported balance as of Jun 27, 2011
James NewsomeJun 16, 20108,980 shares, last reported balance as of Jun 14, 2010
Patrick LynchMay 27, 201055,640 shares, last reported balance as of May 25, 2010
Richard ReddingSep 17, 200968,570 shares, last reported balance as of Sep 15, 2009
Barry GoldblattSep 17, 20094,935 shares, last reported balance as of Sep 15, 2009
Robert SteeleJan 30, 20092,190 shares, last reported balance as of Sep 25, 2008
William Salatich Jr.May 29, 200855,465 shares, last reported balance as of May 27, 2008
Nancy GobleFeb 12, 200810,250 shares, last reported balance as of Feb 12, 2008
Eileen KeeveAug 9, 20078,675 shares, last reported balance as of Aug 7, 2007
James KrauseJul 3, 200720,675 shares, last reported balance as of Jul 2, 2007
John Davidson IIIJun 19, 20078,250 shares, last reported balance as of Jun 15, 2007
Elizabeth HarringtonMay 30, 20072,000 shares, last reported balance as of May 25, 2007
Myron ScholesMay 30, 20072,000 shares, last reported balance as of May 25, 2007
Mazen ChadidAug 11, 200682,150 shares, last reported balance as of Aug 9, 2006
John Roberts IIIJun 19, 20065,750 shares, last reported balance as of Jun 15, 2006
David GomachJun 16, 200428,900 shares, last reported balance as of Jun 14, 2004
Scott RobinsonJun 16, 20047,000 shares, last reported balance as of Jun 14, 2004
Satish NandapurkarJan 6, 2004159,000 shares, last reported balance as of Jan 5, 2004
James McNultyNov 17, 2003676,070 shares, last reported balance as of Nov 13, 2003
Scott JohnstonNo balance on record
Scott GordonNo balance on record
Edemir PintoNo balance on record

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