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$CBOE

$297.01 -$13.22 (4.26%)

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Insider Transactions

Insider Transaction Summary

WILLIAM J BRODSKY

213,735 shares

Net: 0 B/S: -

Edward T Tilly

178,883 shares

Net: 0 B/S: -

CHRISTOPHER R CONCANNON

128,761 shares

Net: 0 B/S: -

Mark S Hemsley

84,046 shares

Net: 0 B/S: -

Edward L Provost

83,446 shares

Net: 0 B/S: -

Joanne Moffic-Silver

78,744 shares

Net: 0 B/S: -

Gerald T O'Connell

67,606 shares

Net: 0 B/S: -

Alan J Dean

63,458 shares

Net: 0 B/S: -

Christopher A Isaacson

49,232 shares

Net: +1,070 B/S: 1.99

Fredric J Tomczyk

35,968 shares

Net: +13,321 B/S: ∞

RODERICK A PALMORE

27,730 shares

Net: +530 B/S: ∞

Eugene S Sunshine

24,611 shares

Net: 0 B/S: -

Michael L Richter

22,171 shares

Net: 0 B/S: -

JOSEPH P RATTERMAN

20,515 shares

Net: 0 B/S: -

SAMUEL K SKINNER

18,061 shares

Net: 0 B/S: -

CRAIG S DONOHUE

17,560 shares

Net: +20,164 B/S: ∞

SUSAN M PHILLIPS

16,876 shares

Net: 0 B/S: -

R EDEN MARTIN

16,876 shares

Net: 0 B/S: -

Carole E Stone

13,819 shares

Net: 0 B/S: -

Janet P Froetscher

13,807 shares

Net: -693 B/S: 0.43

Edward J. Fitzpatrick

13,451 shares

Net: -3,417 B/S: 0.13

Dave Howson

13,309 shares

Net: 0 B/S: -

William M III Farrow

12,735 shares

Net: +530 B/S: ∞

Jill R Goodman

12,448 shares

Net: +530 B/S: ∞

JAMES R BORIS

10,161 shares

Net: 0 B/S: -

James E. Parisi

9,969 shares

Net: +530 B/S: ∞

Brian N Schell

9,577 shares

Net: 0 B/S: -

Ivan K Fong

7,441 shares

Net: +530 B/S: ∞

Jill E. Sommers

6,550 shares

Net: 0 B/S: -

Jennifer J McPeek

6,368 shares

Net: +530 B/S: ∞

Jill Griebenow

4,980 shares

Net: +5,917 B/S: ∞

Alexander JR Matturri

4,761 shares

Net: -1,500 B/S: -

Frank E. Jr. English

4,373 shares

Net: 0 B/S: -

Robert A Hocking

3,495 shares

Net: +4,793 B/S: ∞

Prashant Bhatia

2,621 shares

Net: +3,390 B/S: ∞

John Deters

2,488 shares

Net: 0 B/S: -

Cecilia Mao

2,441 shares

Net: +530 B/S: ∞

Erin Mansfield

2,441 shares

Net: +530 B/S: ∞

John P Sexton

2,289 shares

Net: +3,548 B/S: ∞

Andrew Lowenthal

2,105 shares

Net: 0 B/S: -

Timothy Lipscomb

2,053 shares

Net: +2,262 B/S: ∞

Adam Inzirillo

1,993 shares

Net: 0 B/S: -

Bryan Harkins

1,760 shares

Net: 0 B/S: -

DAVID S REYNOLDS

1,523 shares

Net: 0 B/S: -

Stephanie Foley

1,311 shares

Net: +1,877 B/S: ∞

Catherine R Clay

627 shares

Net: 0 B/S: -

Allen Wilkinson

166 shares

Net: +703 B/S: 4.32

Christopher Mitchell

0 shares

Net: 0 B/S: -

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
WILLIAM J BRODSKY	213,735	0	-
Edward T Tilly	178,883	0	-
CHRISTOPHER R CONCANNON	128,761	0	-
Mark S Hemsley	84,046	0	-
Edward L Provost	83,446	0	-
Joanne Moffic-Silver	78,744	0	-
Gerald T O'Connell	67,606	0	-
Alan J Dean	63,458	0	-
Christopher A Isaacson	49,232	+1,070	1.99
Fredric J Tomczyk	35,968	+13,321	∞
RODERICK A PALMORE	27,730	+530	∞
Eugene S Sunshine	24,611	0	-
Michael L Richter	22,171	0	-
JOSEPH P RATTERMAN	20,515	0	-
SAMUEL K SKINNER	18,061	0	-
CRAIG S DONOHUE	17,560	+20,164	∞
SUSAN M PHILLIPS	16,876	0	-
R EDEN MARTIN	16,876	0	-
Carole E Stone	13,819	0	-
Janet P Froetscher	13,807	-693	0.43
Edward J. Fitzpatrick	13,451	-3,417	0.13
Dave Howson	13,309	0	-
William M III Farrow	12,735	+530	∞
Jill R Goodman	12,448	+530	∞
JAMES R BORIS	10,161	0	-
James E. Parisi	9,969	+530	∞
Brian N Schell	9,577	0	-
Ivan K Fong	7,441	+530	∞
Jill E. Sommers	6,550	0	-
Jennifer J McPeek	6,368	+530	∞
Jill Griebenow	4,980	+5,917	∞
Alexander JR Matturri	4,761	-1,500	-
Frank E. Jr. English	4,373	0	-
Robert A Hocking	3,495	+4,793	∞
Prashant Bhatia	2,621	+3,390	∞
John Deters	2,488	0	-
Cecilia Mao	2,441	+530	∞
Erin Mansfield	2,441	+530	∞
John P Sexton	2,289	+3,548	∞
Andrew Lowenthal	2,105	0	-
Timothy Lipscomb	2,053	+2,262	∞
Adam Inzirillo	1,993	0	-
Bryan Harkins	1,760	0	-
DAVID S REYNOLDS	1,523	0	-
Stephanie Foley	1,311	+1,877	∞
Catherine R Clay	627	0	-
Allen Wilkinson	166	+703	4.32
Christopher Mitchell	0	0	-

Individual Transactions

May 19, 2026

Allen Wilkinson

Grant/Award Acquisition

Change: +166

Price: $0.00

Shares: 166

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Allen Wilkinson	May 21	Grant/Award Acquisition (A) Compensation/Award	166	+166	$0.00	+$0

May 18, 2026

Janet P Froetscher

Open Market Sale

Change: -1,223

Price: $358.09

Shares: 13,807

Value: -$437,944

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Janet P Froetscher	May 20	Open Market Sale (S) Market Sale	13,807	-1,223	$358.09	-$437,944

May 14, 2026

RODERICK A PALMORE

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 27,730

Value: +$0

James E. Parisi

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 9,969

Value: +$0

William M III Farrow

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 12,735

Value: +$0

Ivan K Fong

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 7,441

Value: +$0

Fredric J Tomczyk

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 35,968

Value: +$0

Edward J. Fitzpatrick

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 13,451

Value: +$0

Janet P Froetscher

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 15,030

Value: +$0

Jill R Goodman

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 12,448

Value: +$0

Jennifer J McPeek

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 6,368

Value: +$0

Cecilia Mao

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 2,441

Value: +$0

Erin Mansfield

Grant/Award Acquisition

Change: +530

Price: $0.00

Shares: 2,441

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
RODERICK A PALMORE	May 18	Grant/Award Acquisition (A) Compensation/Award	27,730	+530	$0.00	+$0
James E. Parisi	May 18	Grant/Award Acquisition (A) Compensation/Award	9,969	+530	$0.00	+$0
William M III Farrow	May 18	Grant/Award Acquisition (A) Compensation/Award	12,735	+530	$0.00	+$0
Ivan K Fong	May 18	Grant/Award Acquisition (A) Compensation/Award	7,441	+530	$0.00	+$0
Fredric J Tomczyk	May 18	Grant/Award Acquisition (A) Compensation/Award	35,968	+530	$0.00	+$0
Edward J. Fitzpatrick	May 18	Grant/Award Acquisition (A) Compensation/Award	13,451	+530	$0.00	+$0
Janet P Froetscher	May 18	Grant/Award Acquisition (A) Compensation/Award	15,030	+530	$0.00	+$0
Jill R Goodman	May 18	Grant/Award Acquisition (A) Compensation/Award	12,448	+530	$0.00	+$0
Jennifer J McPeek	May 18	Grant/Award Acquisition (A) Compensation/Award	6,368	+530	$0.00	+$0
Cecilia Mao	May 18	Grant/Award Acquisition (A) Compensation/Award	2,441	+530	$0.00	+$0
Erin Mansfield	May 18	Grant/Award Acquisition (A) Compensation/Award	2,441	+530	$0.00	+$0

February 23, 2026

Allen Wilkinson

Open Market Sale

Change: -248

Price: $292.79

Shares: 410

Value: -$72,611

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Allen Wilkinson	Feb 25	Open Market Sale (S) Market Sale	410	-248	$292.79	-$72,611

February 19, 2026

CRAIG S DONOHUE

Option Exercise/Conversion

Change: +4,683

Price: $286.17

Shares: 4,683

Value: +$1,340,134

Fredric J Tomczyk

Option Exercise/Conversion

Change: +10,965

Price: $286.17

Shares: 41,865

Value: +$3,137,854

Christopher A Isaacson

Tax Payment

Change: -1,104

Price: $286.17

Shares: 48,128

Value: -$315,931

Jill Griebenow

Tax Payment

Change: -192

Price: $286.17

Shares: 14,761

Value: -$54,944

Jill Griebenow

Option Exercise/Conversion

Change: +432

Price: $286.17

Shares: 14,953

Value: +$123,625

Stephanie Foley

Option Exercise/Conversion

Change: +447

Price: $286.17

Shares: 3,264

Value: +$127,917

Insider	Filing Date	Transaction	Shares	Change	Price	Value
CRAIG S DONOHUE	Feb 23	Option Exercise/Conversion (M) Compensation/Award	4,683	+4,683	$286.17	+$1,340,134
Fredric J Tomczyk	Feb 23	Option Exercise/Conversion (M) Compensation/Award	41,865	+10,965	$286.17	+$3,137,854
Christopher A Isaacson	Feb 23	Tax Payment (F) Tax Payment	48,128	-1,104	$286.17	-$315,931
Jill Griebenow	Feb 23	Tax Payment (F) Tax Payment	14,761	-192	$286.17	-$54,944
Jill Griebenow	Feb 23	Option Exercise/Conversion (M) Compensation/Award	14,953	+432	$286.17	+$123,625
Stephanie Foley	Feb 23	Option Exercise/Conversion (M) Compensation/Award	3,264	+447	$286.17	+$127,917