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 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
MERCK AND CO INC: MRK
Price: 4/30/26 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$109.96 $125.14 $73.31 $271,576 2,470 10,888 3.1% 1.1% 81.32% 0.06%
Exch Sector Industry Sub-Industry
NYSE Manufacturing Chemicals And Allied Products Pharmaceutical Preparations
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#
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Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
    
 
SMART DALTON E III
VP,FO,CT
JS
$53,291
483
4/29/26
4/30/26
$110.03
$110.95
8,832
-5.2
D
R
5/1/26 - 5:55:32 pm
2
    
 
SMART DALTON E III
VP,FO,CT
JB
$155,349
1,408
4/29/26
4/30/26
$110.03
$110.95
9,296
17.8
D
R
5/1/26 - 5:55:32 pm
3
    
 
LARSON BETTY D
VP,HR
JS
$649,287
5,858
4/29/26
4/30/26
$110.03
$110.95
7,567
-43.6
D
R
5/1/26 - 5:42:35 pm
4
    
 
LARSON BETTY D
VP,HR
JB
$1,488,695
13,435
4/29/26
4/30/26
$110.03
$110.95
18,917
245.1
D
R
5/1/26 - 5:42:35 pm
5
    
 
GUINDO CHIRFI
VP
JS
$106,619
969
---
4/29/26
---
$110.03
61,613
-1.5
D
R
5/1/26 - 6:54:19 pm
6
    
 
GUINDO CHIRFI
VP
JB
$216,429
1,967
---
4/29/26
---
$110.03
62,582
3.2
D
R
5/1/26 - 6:54:19 pm
7
    
 
CHATTOPADHYAY SANAT
VP,PR
JS
$124,334
1,130
---
4/29/26
---
$110.03
15,347
-6.9
D
R
5/1/26 - 6:32:27 pm
8
    
 
CHATTOPADHYAY SANAT
VP,PR
JB
$285,748
2,597
---
4/29/26
---
$110.03
16,477
18.7
D
R
5/1/26 - 6:32:27 pm
9
    
 
DELUCA RICHARD R
VP,PR
JS
$136,547
1,241
---
4/29/26
---
$110.03
161,537
-0.8
D
R
5/1/26 - 6:20:21 pm
10
    
 
DELUCA RICHARD R
VP,PR
JB
$277,056
2,518
---
4/29/26
---
$110.03
162,778
1.6
D
R
5/1/26 - 6:20:21 pm
11
    
 
WILLIAMS DAVID MICHAEL
VP,IO
JS
$74,710
679
---
4/29/26
---
$110.03
31,716
-2.1
D
R
5/1/26 - 5:56:59 pm
12
    
 
WILLIAMS DAVID MICHAEL
VP,IO
JB
$151,511
1,377
---
4/29/26
---
$110.03
32,395
4.4
D
R
5/1/26 - 5:56:59 pm
13
    
 
LI DEAN Y
VP,PR
JS
$255,930
2,326
---
4/29/26
---
$110.03
94,431
-2.4
D
R
5/1/26 - 5:45:07 pm
14
    
 
LI DEAN Y
VP,PR
JB
$519,562
4,722
---
4/29/26
---
$110.03
96,757
5.1
D
R
5/1/26 - 5:45:07 pm
15
    
 
ZACHARY JENNIFER
VP,GC
JS
$159,984
1,454
---
4/29/26
---
$110.03
70,897
-2.0
D
R
5/1/26 - 5:43:51 pm
16
    
 
ZACHARY JENNIFER
VP,GC
JB
$324,699
2,951
---
4/29/26
---
$110.03
72,351
4.3
D
R
5/1/26 - 5:43:51 pm
17
    
 
LITCHFIELD CAROLINE
VP,CFO
JS
$213,238
1,938
---
4/29/26
---
$110.03
92,301
-2.1
D
R
5/1/26 - 5:39:32 pm
18
    
 
LITCHFIELD CAROLINE
VP,CFO
JB
$432,968
3,935
---
4/29/26
---
$110.03
94,239
4.4
D
R
5/1/26 - 5:39:32 pm
19
    
 
DAVIS ROBERT M
CB,CEO,PR,DIR
JS
$720,807
6,551
---
4/29/26
---
$110.03
450,351
-1.4
D
R
5/1/26 - 5:38:12 pm
20
    
 
DAVIS ROBERT M
CB,CEO,PR,DIR
JB
$1,463,399
13,300
---
4/29/26
---
$110.03
456,902
3.0
D
R
5/1/26 - 5:38:12 pm
21
    
 
OOSTHUIZEN JOHANNES JACOBUS
VP
JS
$74,710
679
---
4/29/26
---
$110.03
21,895
-3.0
D
R
5/1/26 - 5:34:24 pm
22
    
 
OOSTHUIZEN JOHANNES JACOBUS
VP
JB
$151,511
1,377
---
4/29/26
---
$110.03
22,574
6.5
D
R
5/1/26 - 5:34:24 pm
23
    
 
FOARD BRIAN
VP
3
---
---
---
3/2/26
---
---
---
---
---
---
3/12/26 - 1:52:51 pm
24
    
 
GUINDO CHIRFI
SO
S
$1,214,562
10,000
---
2/12/26
---
$121.46
60,615
-14.2
D
---
2/12/26 - 4:02:53 pm
25
    
 
LI DEAN Y
VP,PR
S
$1,202,844
10,235
---
2/10/26
---
$117.52
92,035
-10.0
D
---
2/10/26 - 4:04:14 pm
26
    
 
GUINDO CHIRFI
SO
S
$1,184,101
10,000
---
2/9/26
---
$118.41
70,615
-12.4
D
---
2/9/26 - 4:04:59 pm
27
    
 
ZACHARY JENNIFER
VP,GC
OS
$14,485,690
121,573
---
2/9/26
---
$119.15
68,916
-63.8
D
---
2/9/26 - 4:01:25 pm
28
    
 
ZACHARY JENNIFER
VP,GC
OE
$14,485,690
121,573
---
2/9/26
---
$119.15
125,708
2,940.3
D
---
2/9/26 - 4:01:25 pm
29
    
 
WILLIAMS DAVID MICHAEL
VP,IO
OS
$609,525
5,000
---
2/6/26
---
$121.91
30,838
-14.0
D
---
2/6/26 - 4:20:14 pm
30
    
 
WILLIAMS DAVID MICHAEL
VP,IO
OE
$388,100
5,000
---
2/6/26
---
$77.62
35,838
16.2
D
---
2/6/26 - 4:20:14 pm
31
    
 
OOSTHUIZEN JOHANNES JACOBUS
PR
S
$1,827,992
15,000
---
2/6/26
---
$121.87
21,197
-41.4
D
---
2/6/26 - 4:15:15 pm
32
1y
8
25%
7%
1
DELUCA RICHARD R
VP,PR
S
$4,557,025
37,685
---
2/6/26
---
$120.92
160,174
-19.0
D
---
2/6/26 - 4:08:41 pm
33
    
 
GUINDO CHIRFI
SO
S
$2,437,676
20,000
---
2/5/26
---
$121.88
80,615
-19.9
D
---
2/6/26 - 4:10:16 pm
34
    
 
SMART DALTON E III
VP,FO,CT
OS
$765,920
6,400
---
2/4/26
---
$119.67
8,205
-43.8
D
---
2/6/26 - 4:18:28 pm
35
    
 
SMART DALTON E III
VP,FO,CT
OE
$248,280
4,000
---
2/4/26
---
$62.07
14,605
37.7
D
---
2/6/26 - 4:18:28 pm
36
    
 
LITCHFIELD CAROLINE
VP,CFO
OS
$5,023,312
41,997
---
2/4/26
---
$119.61
90,192
-31.8
D
---
2/6/26 - 4:13:42 pm
37
    
 
LITCHFIELD CAROLINE
VP,CFO
OE
$2,228,361
41,997
---
2/4/26
---
$53.06
132,189
46.6
D
---
2/6/26 - 4:13:42 pm
38
    
 
LI DEAN Y
VP,PR
OS
$1,791,824
15,087
---
2/4/26
---
$118.77
102,270
-12.9
D
---
2/6/26 - 4:12:16 pm
39
    
 
LI DEAN Y
VP,PR
OE
$845,476
15,087
---
2/4/26
---
$56.04
117,357
14.8
D
---
2/6/26 - 4:12:16 pm
40
1y
6
67%
-7%
2
DAVIS ROBERT M
CB,CEO,PR,DIR
S
$5,599,328
47,434
---
2/4/26
$117.38
$118.35
443,602
-9.7
D
---
2/6/26 - 4:05:31 pm
41
    
 
ZACHARY JENNIFER
VP,GC
JB
$1,244,014
11,583
---
1/26/26
---
$107.40
68,916
20.2
D
---
1/28/26 - 4:19:55 pm
42
    
 
WILLIAMS DAVID MICHAEL
VP,IO
JB
$656,429
6,112
---
1/26/26
---
$107.40
30,838
24.7
D
---
1/28/26 - 4:18:18 pm
43
    
 
SMART DALTON E III
VP,FO,CT
JB
$114,488
1,066
---
1/26/26
---
$107.40
10,605
11.2
D
---
1/28/26 - 4:16:29 pm
44
    
 
ROMANELLI JOSEPH
PR,HR
JB
$612,502
5,703
---
1/26/26
---
$107.40
28,739
24.8
D
---
1/28/26 - 4:14:43 pm
45
    
 
OOSTHUIZEN JOHANNES JACOBUS
PR
JB
$539,792
5,026
---
1/26/26
---
$107.40
36,197
16.1
D
---
1/28/26 - 4:12:23 pm
46
    
 
LITCHFIELD CAROLINE
VP,CFO
JB
$1,702,505
15,852
---
1/26/26
---
$107.40
90,192
21.3
D
---
1/28/26 - 4:10:59 pm
47
    
 
LI DEAN Y
VP,PR
JB
$2,198,371
20,469
---
1/26/26
---
$107.40
102,270
25.0
D
---
1/28/26 - 4:09:26 pm
48
    
 
GUINDO CHIRFI
SO
JB
$1,059,501
9,865
---
1/26/26
---
$107.40
100,615
10.9
D
---
1/28/26 - 4:08:02 pm
49
    
 
DELUCA RICHARD R
VP,PR
JB
$1,317,154
12,264
---
1/26/26
---
$107.40
197,859
6.6
D
---
1/28/26 - 4:05:39 pm
50
    
 
DAVIS ROBERT M
CB,CEO,PR,DIR
JB
$5,094,412
47,434
---
1/26/26
---
$107.40
491,036
10.7
D
---
1/28/26 - 4:03:37 pm
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