Understand Stock

$MRK

$116.39 +$1.69 (1.47%)

Deep Research with AI Research

Overview

$MRK Overview Financials SEC Filings Executives News

Specialized Tools

Valuations P Insider Transactions P Congressional Trades P

Insider Transactions

Insider Transaction Summary

KENNETH C FRAZIER

936,422 shares

Net: 0 B/S: -

Robert M Davis

456,902 shares

Net: +39,211 B/S: 4.06

Adam H Schechter

277,879 shares

Net: 0 B/S: -

Richard R. DeLuca

162,778 shares

Net: -24,144 B/S: 0.39

ROGER M PERLMUTTER

151,029 shares

Net: 0 B/S: -

Willie A Deese

133,759 shares

Net: 0 B/S: -

PETER C WENDELL

124,753 shares

Net: 0 B/S: -

THOMAS H GLOCER

108,293 shares

Net: +2,065 B/S: ∞

Frank Clyburn

97,095 shares

Net: 0 B/S: -

Dean Y Li

96,757 shares

Net: +12,630 B/S: 1.59

Caroline Litchfield

94,239 shares

Net: +17,849 B/S: 1.47

ROCHELLE B LAZARUS

87,596 shares

Net: 0 B/S: -

Jennifer Zachary

72,351 shares

Net: +13,080 B/S: 1.56

Michael J Holston

69,786 shares

Net: 0 B/S: -

Chirfi Guindo

62,582 shares

Net: -10,409 B/S: 1.22

WEIR MIRIAN M GRADDICK

62,213 shares

Net: 0 B/S: -

PATRICIA F RUSSO

58,523 shares

Net: 0 B/S: -

Michael Rosenblatt

50,934 shares

Net: 0 B/S: -

LESLIE A BRUN

49,719 shares

Net: 0 B/S: -

Julie L. Gerberding

48,712 shares

Net: 0 B/S: -

Rita A Karachun

45,710 shares

Net: 0 B/S: -

Thomas R Cech

40,238 shares

Net: 0 B/S: -

CARLOS E REPRESAS

33,755 shares

Net: 0 B/S: -

David Michael Williams

32,395 shares

Net: +6,883 B/S: 2.17

Pamela J. Craig

31,991 shares

Net: 0 B/S: -

Paul Rothman

31,991 shares

Net: 0 B/S: -

Craig B. Thompson

31,810 shares

Net: 0 B/S: -

Mary Ellen Coe

29,703 shares

Net: +1,270 B/S: ∞

Joseph Romanelli

28,739 shares

Net: +5,703 B/S: ∞

INGE G THULIN

24,764 shares

Net: 0 B/S: -

Michael A Klobuchar

23,621 shares

Net: 0 B/S: -

STEVEN MIZELL

23,619 shares

Net: 0 B/S: -

ADELE D AMBROSE

22,708 shares

Net: 0 B/S: -

Johannes Jacobus Oosthuizen

22,574 shares

Net: -9,276 B/S: 0.43

Michael Nally

19,630 shares

Net: 0 B/S: -

Christine E Seidman

19,238 shares

Net: +345 B/S: ∞

Betty D Larson

18,917 shares

Net: +7,577 B/S: ∞

Inge G Thulin

16,519 shares

Net: 0 B/S: -

Sanat Chattopadhyay

16,477 shares

Net: +15,347 B/S: ∞

WILLIAM B JR HARRISON

16,400 shares

Net: 0 B/S: -

Kathy J Warden

15,504 shares

Net: 0 B/S: -

RISA J LAVIZZO-MOUREY

15,367 shares

Net: 0 B/S: -

Clark Golestani

14,083 shares

Net: 0 B/S: -

Stephen Mayo

12,540 shares

Net: 0 B/S: -

Michael Fleming

10,283 shares

Net: 0 B/S: -

DOUGLAS M JR BAKER

9,344 shares

Net: 0 B/S: -

C ROBERT KIDDER

9,317 shares

Net: 0 B/S: -

John H Noseworthy

9,225 shares

Net: 0 B/S: -

Dalton E. III Smart

9,137 shares

Net: +1,991 B/S: 1.62

James H Scholefield

7,142 shares

Net: 0 B/S: -

Dalton Smart

7,014 shares

Net: 0 B/S: -

Lisa LeCointe-Cephas

5,142 shares

Net: 0 B/S: -

Surendralal Lanca Karsanbhai

3,421 shares

Net: 0 B/S: -

Ashley Watson

2,597 shares

Net: 0 B/S: -

Arpa Garay

2,109 shares

Net: 0 B/S: -

WENDELL P WEEKS

100 shares

Net: 0 B/S: -

Cristal N Downing

0 shares

Net: -7,085 B/S: -

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
KENNETH C FRAZIER	936,422	0	-
Robert M Davis	456,902	+39,211	4.06
Adam H Schechter	277,879	0	-
Richard R. DeLuca	162,778	-24,144	0.39
ROGER M PERLMUTTER	151,029	0	-
Willie A Deese	133,759	0	-
PETER C WENDELL	124,753	0	-
THOMAS H GLOCER	108,293	+2,065	∞
Frank Clyburn	97,095	0	-
Dean Y Li	96,757	+12,630	1.59
Caroline Litchfield	94,239	+17,849	1.47
ROCHELLE B LAZARUS	87,596	0	-
Jennifer Zachary	72,351	+13,080	1.56
Michael J Holston	69,786	0	-
Chirfi Guindo	62,582	-10,409	1.22
WEIR MIRIAN M GRADDICK	62,213	0	-
PATRICIA F RUSSO	58,523	0	-
Michael Rosenblatt	50,934	0	-
LESLIE A BRUN	49,719	0	-
Julie L. Gerberding	48,712	0	-
Rita A Karachun	45,710	0	-
Thomas R Cech	40,238	0	-
CARLOS E REPRESAS	33,755	0	-
David Michael Williams	32,395	+6,883	2.17
Pamela J. Craig	31,991	0	-
Paul Rothman	31,991	0	-
Craig B. Thompson	31,810	0	-
Mary Ellen Coe	29,703	+1,270	∞
Joseph Romanelli	28,739	+5,703	∞
INGE G THULIN	24,764	0	-
Michael A Klobuchar	23,621	0	-
STEVEN MIZELL	23,619	0	-
ADELE D AMBROSE	22,708	0	-
Johannes Jacobus Oosthuizen	22,574	-9,276	0.43
Michael Nally	19,630	0	-
Christine E Seidman	19,238	+345	∞
Betty D Larson	18,917	+7,577	∞
Inge G Thulin	16,519	0	-
Sanat Chattopadhyay	16,477	+15,347	∞
WILLIAM B JR HARRISON	16,400	0	-
Kathy J Warden	15,504	0	-
RISA J LAVIZZO-MOUREY	15,367	0	-
Clark Golestani	14,083	0	-
Stephen Mayo	12,540	0	-
Michael Fleming	10,283	0	-
DOUGLAS M JR BAKER	9,344	0	-
C ROBERT KIDDER	9,317	0	-
John H Noseworthy	9,225	0	-
Dalton E. III Smart	9,137	+1,991	1.62
James H Scholefield	7,142	0	-
Dalton Smart	7,014	0	-
Lisa LeCointe-Cephas	5,142	0	-
Surendralal Lanca Karsanbhai	3,421	0	-
Ashley Watson	2,597	0	-
Arpa Garay	2,109	0	-
WENDELL P WEEKS	100	0	-
Cristal N Downing	0	-7,085	-

Individual Transactions

April 30, 2026

Dalton E. III Smart

Option Exercise/Conversion

Change: +464

Price: $110.95

Shares: 9,296

Value: +$51,480

Betty D Larson

Tax Payment

Change: -5,143

Price: $110.95

Shares: 13,774

Value: -$570,615

Betty D Larson

Option Exercise/Conversion

Change: +11,350

Price: $110.95

Shares: 18,917

Value: +$1,259,282

Dalton E. III Smart

Tax Payment

Change: -159

Price: $110.95

Shares: 9,137

Value: -$17,641

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Dalton E. III Smart	May 01	Option Exercise/Conversion (M) Compensation/Award	9,296	+464	$110.95	+$51,480
Betty D Larson	May 01	Tax Payment (F) Tax Payment	13,774	-5,143	$110.95	-$570,615
Betty D Larson	May 01	Option Exercise/Conversion (M) Compensation/Award	18,917	+11,350	$110.95	+$1,259,282
Dalton E. III Smart	May 01	Tax Payment (F) Tax Payment	9,137	-159	$110.95	-$17,641

April 29, 2026

Robert M Davis

Tax Payment

Change: -6,551

Price: $110.03

Shares: 450,351

Value: -$720,806

Robert M Davis

Option Exercise/Conversion

Change: +13,300

Price: $110.03

Shares: 456,902

Value: +$1,463,399

Richard R. DeLuca

Tax Payment

Change: -1,241

Price: $110.03

Shares: 161,537

Value: -$136,547

Richard R. DeLuca

Option Exercise/Conversion

Change: +2,518

Price: $110.03

Shares: 162,778

Value: +$277,055

Betty D Larson

Tax Payment

Change: -715

Price: $110.03

Shares: 7,567

Value: -$78,671

Betty D Larson

Option Exercise/Conversion

Change: +2,085

Price: $110.03

Shares: 8,282

Value: +$229,412

Sanat Chattopadhyay

Tax Payment

Change: -1,130

Price: $110.03

Shares: 15,347

Value: -$124,333

Sanat Chattopadhyay

Option Exercise/Conversion

Change: +2,597

Price: $110.03

Shares: 16,477

Value: +$285,747

Chirfi Guindo

Tax Payment

Change: -969

Price: $110.03

Shares: 61,613

Value: -$106,619

Chirfi Guindo

Option Exercise/Conversion

Change: +1,967

Price: $110.03

Shares: 62,582

Value: +$216,429

Jennifer Zachary

Tax Payment

Change: -1,454

Price: $110.03

Shares: 70,897

Value: -$159,983

Jennifer Zachary

Option Exercise/Conversion

Change: +2,951

Price: $110.03

Shares: 72,351

Value: +$324,698

David Michael Williams

Tax Payment

Change: -679

Price: $110.03

Shares: 31,716

Value: -$74,710

David Michael Williams

Option Exercise/Conversion

Change: +1,377

Price: $110.03

Shares: 32,395

Value: +$151,511

Dean Y Li

Tax Payment

Change: -2,326

Price: $110.03

Shares: 94,431

Value: -$255,929

Dean Y Li

Option Exercise/Conversion

Change: +4,722

Price: $110.03

Shares: 96,757

Value: +$519,561

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Robert M Davis	May 01	Tax Payment (F) Tax Payment	450,351	-6,551	$110.03	-$720,806
Robert M Davis	May 01	Option Exercise/Conversion (M) Compensation/Award	456,902	+13,300	$110.03	+$1,463,399
Richard R. DeLuca	May 01	Tax Payment (F) Tax Payment	161,537	-1,241	$110.03	-$136,547
Richard R. DeLuca	May 01	Option Exercise/Conversion (M) Compensation/Award	162,778	+2,518	$110.03	+$277,055
Betty D Larson	May 01	Tax Payment (F) Tax Payment	7,567	-715	$110.03	-$78,671
Betty D Larson	May 01	Option Exercise/Conversion (M) Compensation/Award	8,282	+2,085	$110.03	+$229,412
Sanat Chattopadhyay	May 01	Tax Payment (F) Tax Payment	15,347	-1,130	$110.03	-$124,333
Sanat Chattopadhyay	May 01	Option Exercise/Conversion (M) Compensation/Award	16,477	+2,597	$110.03	+$285,747
Chirfi Guindo	May 01	Tax Payment (F) Tax Payment	61,613	-969	$110.03	-$106,619
Chirfi Guindo	May 01	Option Exercise/Conversion (M) Compensation/Award	62,582	+1,967	$110.03	+$216,429
Jennifer Zachary	May 01	Tax Payment (F) Tax Payment	70,897	-1,454	$110.03	-$159,983
Jennifer Zachary	May 01	Option Exercise/Conversion (M) Compensation/Award	72,351	+2,951	$110.03	+$324,698
David Michael Williams	May 01	Tax Payment (F) Tax Payment	31,716	-679	$110.03	-$74,710
David Michael Williams	May 01	Option Exercise/Conversion (M) Compensation/Award	32,395	+1,377	$110.03	+$151,511
Dean Y Li	May 01	Tax Payment (F) Tax Payment	94,431	-2,326	$110.03	-$255,929
Dean Y Li	May 01	Option Exercise/Conversion (M) Compensation/Award	96,757	+4,722	$110.03	+$519,561