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 JS
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Detailed Insider History for:
MERCK AND CO INC: MRK
Price: 3/6/26 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
$115.79 $125.14 $73.31 $286,278 2,472 13,232 2.9% 1.3% 81.36% 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
    
 
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
2
    
 
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
3
    
 
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
4
    
 
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
5
    
 
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
6
    
 
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
7
    
 
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
8
    
 
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
9
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
10
    
 
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
11
    
 
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
12
    
 
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
13
    
 
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
14
    
 
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
15
    
 
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
16
    
 
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
17
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
18
    
 
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
19
    
 
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
20
    
 
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
21
    
 
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
22
    
 
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
23
    
 
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
24
    
 
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
25
    
 
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
26
    
 
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
27
    
 
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
28
    
 
CHATTOPADHYAY SANAT
VP,PR
JB
$1,490,712
13,880
---
1/26/26
---
$107.40
13,880
New
D
---
1/28/26 - 4:01:29 pm
29
    
 
DOWNING CRISTAL N
O
S
$616,395
7,085
---
11/10/25
---
$87.00
---
All
D
---
11/12/25 - 4:01:31 pm
30
    
 
WILLIAMS DAVID MICHAEL
VP,IO
S
$720,040
8,614
---
11/3/25
---
$83.59
24,578
-26.0
D
---
11/4/25 - 4:02:03 pm
31
    
 
WILLIAMS DAVID MICHAEL
VP,IO
JS
$668,573
8,432
---
8/4/25
---
$79.29
33,013
-20.3
D
R
8/5/25 - 8:46:15 am
32
    
 
WILLIAMS DAVID MICHAEL
VP,IO
JB
$1,357,366
17,119
---
8/4/25
---
$79.29
41,445
70.4
D
R
8/5/25 - 8:46:15 am
33
    
 
GUINDO CHIRFI
SO
JS
$1,441,096
18,175
---
8/4/25
---
$79.29
89,234
-16.9
D
R
8/5/25 - 8:43:24 am
34
    
 
GUINDO CHIRFI
SO
JB
$2,926,039
36,903
---
8/4/25
---
$79.29
107,409
52.3
D
R
8/5/25 - 8:43:24 am
35
    
 
LARSON BETTY D
VP,HR
JS
$436,511
5,153
---
4/30/25
---
$84.71
6,197
-45.4
D
R
5/2/25 - 4:12:31 pm
36
    
 
LARSON BETTY D
VP,HR
JB
$961,459
11,350
---
4/30/25
---
$84.71
11,350
New
D
R
5/2/25 - 4:12:31 pm
37
    
 
SMART DALTON E III
VP,FO,CT
OS
$352,723
4,262
---
4/25/25
---
$82.76
7,778
-35.4
D
---
4/29/25 - 4:04:40 pm
38
    
 
SMART DALTON E III
VP,FO,CT
OE
$290,400
5,000
---
4/25/25
---
$58.08
12,040
71.0
D
---
4/29/25 - 4:04:40 pm
39
    
 
OOSTHUIZEN JOHANNES JACOBUS
PR
S
$714,745
8,500
---
2/19/25
---
$84.09
30,705
-21.7
D
---
2/20/25 - 4:01:54 pm
40
    
 
WILLIAMS DAVID MICHAEL
VP,IO
S
$512,057
6,000
---
2/13/25
---
$85.34
24,123
-19.9
D
---
2/13/25 - 4:01:11 pm
41
    
 
OOSTHUIZEN JOHANNES JACOBUS
PR
JS
$558,941
6,404
---
2/8/25
---
$87.28
39,205
-14.0
D
R
2/11/25 - 2:59:22 pm
42
    
 
OOSTHUIZEN JOHANNES JACOBUS
PR
JB
$1,134,815
13,002
---
2/8/25
---
$87.28
45,609
39.9
D
R
2/11/25 - 2:59:22 pm
43
1y
1
100%
40%
3
THULIN INGE G
DIR
B
$250,000
2,833
---
2/6/25
---
$88.25
2,933
2,832.9
D
---
2/7/25 - 4:09:51 pm
44
    
 
DOWNING CRISTAL N
O
S
$209,551
2,361
---
2/6/25
---
$88.76
7,085
-25.0
D
---
2/7/25 - 4:07:43 pm
45
1y
1
100%
40%
4
BAKER DOUGLAS M JR
DIR
B
$1,327,500
15,000
---
2/5/25
---
$88.50
16,000
1,500.0
D
---
2/7/25 - 4:04:52 pm
46
    
 
ZACHARY JENNIFER
VP,GC
JB
$2,489,929
25,423
---
1/27/25
---
$97.94
55,286
85.1
D
---
1/29/25 - 6:29:21 pm
47
    
 
WILLIAMS DAVID MICHAEL
VP,IO
JB
$1,003,493
10,246
---
1/27/25
---
$97.94
30,123
51.5
D
---
1/29/25 - 6:27:10 pm
48
    
 
SMART DALTON
VP,FO,CT
JB
$253,273
2,586
---
1/27/25
---
$97.94
7,014
58.4
D
---
1/29/25 - 6:25:14 pm
49
    
 
OOSTHUIZEN JOHANNES JACOBUS
PR
JB
$848,552
8,664
---
1/27/25
---
$97.94
32,607
36.2
D
---
1/29/25 - 6:23:37 pm
50
    
 
LITCHFIELD CAROLINE
VP,CFO
JB
$2,294,930
23,432
---
1/27/25
---
$97.94
74,340
46.0
D
---
1/29/25 - 6:21:12 pm
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