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$CBOE

$286.10 +$10.51 (3.81%)

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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: -2,990 B/S: 1.09

Fredric J Tomczyk

35,438 shares

Net: +13,414 B/S: ∞

RODERICK A PALMORE

27,200 shares

Net: 0 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: ∞

R EDEN MARTIN

16,876 shares

Net: 0 B/S: -

SUSAN M PHILLIPS

16,876 shares

Net: 0 B/S: -

Janet P Froetscher

14,500 shares

Net: 0 B/S: -

Carole E Stone

13,819 shares

Net: 0 B/S: -

Dave Howson

13,309 shares

Net: 0 B/S: -

Edward J. Fitzpatrick

12,921 shares

Net: -3,947 B/S: -

William M III Farrow

12,205 shares

Net: 0 B/S: -

Jill R Goodman

11,918 shares

Net: 0 B/S: -

JAMES R BORIS

10,161 shares

Net: 0 B/S: -

Brian N Schell

9,577 shares

Net: 0 B/S: -

James E. Parisi

9,439 shares

Net: 0 B/S: -

Ivan K Fong

6,911 shares

Net: 0 B/S: -

Jill E. Sommers

6,550 shares

Net: 0 B/S: -

Jennifer J McPeek

5,838 shares

Net: 0 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: -

John P Sexton

2,289 shares

Net: +3,799 B/S: ∞

Andrew Lowenthal

2,105 shares

Net: 0 B/S: -

Timothy Lipscomb

2,053 shares

Net: +2,638 B/S: ∞

Adam Inzirillo

1,993 shares

Net: 0 B/S: -

Cecilia Mao

1,911 shares

Net: 0 B/S: -

Erin Mansfield

1,911 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: +627 B/S: ∞

Allen Wilkinson

410 shares

Net: +537 B/S: 3.65

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	-2,990	1.09
Fredric J Tomczyk	35,438	+13,414	∞
RODERICK A PALMORE	27,200	0	-
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	∞
R EDEN MARTIN	16,876	0	-
SUSAN M PHILLIPS	16,876	0	-
Janet P Froetscher	14,500	0	-
Carole E Stone	13,819	0	-
Dave Howson	13,309	0	-
Edward J. Fitzpatrick	12,921	-3,947	-
William M III Farrow	12,205	0	-
Jill R Goodman	11,918	0	-
JAMES R BORIS	10,161	0	-
Brian N Schell	9,577	0	-
James E. Parisi	9,439	0	-
Ivan K Fong	6,911	0	-
Jill E. Sommers	6,550	0	-
Jennifer J McPeek	5,838	0	-
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	-
John P Sexton	2,289	+3,799	∞
Andrew Lowenthal	2,105	0	-
Timothy Lipscomb	2,053	+2,638	∞
Adam Inzirillo	1,993	0	-
Cecilia Mao	1,911	0	-
Erin Mansfield	1,911	0	-
Bryan Harkins	1,760	0	-
DAVID S REYNOLDS	1,523	0	-
Stephanie Foley	1,311	+1,877	∞
Catherine R Clay	627	+627	∞
Allen Wilkinson	410	+537	3.65
Christopher Mitchell	0	0	-

Individual Transactions

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

Stephanie Foley

Tax Payment

Change: -177

Price: $286.17

Shares: 3,087

Value: -$50,652

Christopher A Isaacson

Option Exercise/Conversion

Change: +2,488

Price: $286.17

Shares: 49,232

Value: +$711,990

John P Sexton

Tax Payment

Change: -38

Price: $286.17

Shares: 28,040

Value: -$10,874

John P Sexton

Option Exercise/Conversion

Change: +84

Price: $286.17

Shares: 28,078

Value: +$24,038

Prashant Bhatia

Grant/Award Acquisition

Change: +2,621

Price: $0.00

Shares: 2,621

Value: +$0

Prashant Bhatia

Option Exercise/Conversion

Change: +224

Price: $286.17

Shares: 224

Value: +$64,102

Prashant Bhatia

Tax Payment

Change: -129

Price: $286.17

Shares: 95

Value: -$36,915

Robert A Hocking

Grant/Award Acquisition

Change: +3,495

Price: $0.00

Shares: 3,495

Value: +$0

Robert A Hocking

Option Exercise/Conversion

Change: +355

Price: $286.17

Shares: 637

Value: +$101,590

Robert A Hocking

Tax Payment

Change: -123

Price: $286.17

Shares: 514

Value: -$35,198

Timothy Lipscomb

Grant/Award Acquisition

Change: +2,053

Price: $0.00

Shares: 2,053

Value: +$0

Timothy Lipscomb

Option Exercise/Conversion

Change: +416

Price: $286.17

Shares: 2,032

Value: +$119,046

Timothy Lipscomb

Tax Payment

Change: -207

Price: $286.17

Shares: 1,825

Value: -$59,237

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
Stephanie Foley	Feb 23	Tax Payment (F) Tax Payment	3,087	-177	$286.17	-$50,652
Christopher A Isaacson	Feb 23	Option Exercise/Conversion (M) Compensation/Award	49,232	+2,488	$286.17	+$711,990
John P Sexton	Feb 23	Tax Payment (F) Tax Payment	28,040	-38	$286.17	-$10,874
John P Sexton	Feb 23	Option Exercise/Conversion (M) Compensation/Award	28,078	+84	$286.17	+$24,038
Prashant Bhatia	Feb 23	Grant/Award Acquisition (A) Compensation/Award	2,621	+2,621	$0.00	+$0
Prashant Bhatia	Feb 23	Option Exercise/Conversion (M) Compensation/Award	224	+224	$286.17	+$64,102
Prashant Bhatia	Feb 23	Tax Payment (F) Tax Payment	95	-129	$286.17	-$36,915
Robert A Hocking	Feb 23	Grant/Award Acquisition (A) Compensation/Award	3,495	+3,495	$0.00	+$0
Robert A Hocking	Feb 23	Option Exercise/Conversion (M) Compensation/Award	637	+355	$286.17	+$101,590
Robert A Hocking	Feb 23	Tax Payment (F) Tax Payment	514	-123	$286.17	-$35,198
Timothy Lipscomb	Feb 23	Grant/Award Acquisition (A) Compensation/Award	2,053	+2,053	$0.00	+$0
Timothy Lipscomb	Feb 23	Option Exercise/Conversion (M) Compensation/Award	2,032	+416	$286.17	+$119,046
Timothy Lipscomb	Feb 23	Tax Payment (F) Tax Payment	1,825	-207	$286.17	-$59,237