InsiderClue
← All stocks

Merck & Co.

MRK Net selling
CIK 0000310158 #311 in the set updated 17 Sep 2026
Bought (120 mo)
$1.62M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$922.23M
$0.00 on a plan · $850.14M straight out of an exercise
Sold at will
$72.10M
49 of 192 sales
Net
−$920.61M
−$70.47M against sales at will

By person

41 insiders · 308 transactions
36.9×

Robert M. Davis holds 36.9 times base salary in stock. $60.80M of shares against $1.65M in salary for 2025.

Salary from the company's own proxy. The shares are what Robert M. Davis last reported holding, valued at $135.00, the price Common Stock was last bought or sold at on the open market here, on 13 Aug 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
FRAZIER KENNETH C
Executive Chair
—
$413.58M (35) scheduled
−$413.58M
700,653
0.0284%
$94.59M
+135.1%
Davis Robert M
Chairman, CEO & President
—
$123.52M (13) scheduled
−$123.52M
450,351
0.0183%
$60.80M
+15,549%
DeLuca Richard R.
EVP&Pres, Merck Animal Heallth
—
$71.18M (19) scheduled
−$71.18M
110,167
0.0045%
$14.87M
+111.6%
Zachary Jennifer
EVP, General Counsel
—
$57.95M (9) scheduled
−$57.95M
45,509
0.0018%
$6.14M
+532.0%
Schechter Adam H
EVP & Pres-Global Human Health
—
$48.22M (10) scheduled
−$48.22M
55,406
0.0022%
$7.48M
−56.7%
Chattopadhyay Sanat
Exe V-P & Pres. MMD
—
$45.61M (12) scheduled
−$45.61M
15,347
0.0006%
$2.07M
—
Gerberding Julie L.
EVP, Chief Patient Officer
—
$28.93M (7) scheduled
−$28.93M
48,712
0.0020%
$6.58M
+12.4%
MIZELL STEVEN
EVP, Chief HR Officer
—
$20.94M (14) scheduled
−$20.94M
23,619
0.0010%
$3.19M
+54,644%
PERLMUTTER ROGER M
Exe V-P & Pres, MRL
—
$16.97M (1) scheduled
−$16.97M
214,428
0.0087%
$28.95M
+172.0%
Karachun Rita A
Sr. VP Fince-Global Controller
—
$12.91M (6) scheduled
−$12.91M
45,710
0.0019%
$6.17M
+212.0%
Litchfield Caroline
EVP & CFO
—
$11.50M (3) scheduled
−$11.50M
92,301
0.0037%
$12.46M
+370.9%
Oosthuizen Johannes Jacobus
EVP, Oncology & Int?l
—
$10.25M (7) scheduled
−$10.25M
21,895
0.0009%
$2.96M
+56.9%
Williams David Michael
EVP,Chief Info&Digital Officer
—
$9.71M (8) scheduled
−$9.71M
31,716
0.0013%
$4.28M
+768.0%
Clyburn Frank
EVP & Pres ? Human Health
—
$8.49M (4) scheduled
−$8.49M
97,095
0.0039%
$13.11M
+42.4%
Guindo Chirfi
EVP, Access, Policy & Comms
—
$8.15M (5)
−$8.15M
36,613
0.0015%
$4.94M
+570.2%
GRADDICK WEIR MIRIAN M
Exe V-P, HR
—
$7.91M (5) scheduled
−$7.91M
80,433
0.0033%
$10.86M
−7.0%
Holston Michael J
EVP, General Counsel
—
$6.65M (3) scheduled
−$6.65M
69,786
0.0028%
$9.42M
+10.0%
Li Dean Y
Executive VP & President, MRL
—
$4.84M (3) scheduled
−$4.84M
94,431
0.0038%
$12.75M
+795.6%
Watson Ashley
SVP Chief Ethics & Com Officer
—
$3.50M (1) scheduled
−$3.50M
9,770
0.0004%
$1.32M
+6,079%
Maraldo David R.
EVP & Pres. MMD
—
$2.41M (3) scheduled
−$2.41M
18,212
0.0007%
$2.46M
+2.2%
WEEKS WENDELL P
Director
—
$1.36M (4) scheduled
−$1.36M
100
<0.0001%
$13.50K
0.0%
BAKER DOUGLAS M JR
Director
$1.33M (1)
—
+$1.33M
16,000
0.0006%
$2.16M
+1,500%
WENDELL PETER C
Director
—
$1.25M (2) scheduled
−$1.25M
1,000
<0.0001%
$135.00K
0.0%
LAZARUS ROCHELLE B
Director
—
$1.18M (1) scheduled
−$1.18M
4,594
0.0002%
$620.19K
0.0%
Smart Dalton E. III
SVP Fin. - Global Controller
—
$1.12M (3) scheduled
−$1.12M
9,388
0.0004%
$1.27M
+23,780%
GLOCER THOMAS H
Director
—
$1.04M (2) scheduled
−$1.04M
5,100
0.0002%
$688.50K
0.0%
Downing Cristal N
Chief Comm. & Public Afrs Ofcr
—
$825.95K (2)
−$825.95K
0
0.0000%
$0.00
—
Romanelli Joseph
President, Human Health Int?l
$44.34K (8)
$679.21K (5)
−$634.87K
28,739
0.0012%
$3.88M
+13.1%
BRUN LESLIE A
Director
—
$612.98K (2) scheduled
−$612.98K
1,948
<0.0001%
$262.98K
—
RUSSO PATRICIA F
Director
—
$322.12K (1) scheduled
−$322.12K
13,148
0.0005%
$1.77M
0.0%
KIDDER C ROBERT
Director
—
$317.70K (1) scheduled
−$317.70K
9,317
0.0004%
$1.26M
0.0%
Cech Thomas R
Director
—
$317.10K (1) scheduled
−$317.10K
100
<0.0001%
$13.50K
0.0%
THULIN INGE G
Director
$250.00K (1)
—
+$250.00K
2,933
0.0001%
$395.94K
+2,833%
Klobuchar Michael A
EVP - Chief Strategy Officer
—
—
—
23,621
0.0010%
$3.19M
+106.1%
AMBROSE ADELE D
Sr.V-P & Chief Comuns Officer
—
—
—
22,708
0.0009%
$3.07M
+24.1%
Nally Michael
EVP, Chief Marketing Officer
—
—
—
19,630
0.0008%
$2.65M
+4,360%
Larson Betty D
EVP, Chief HR Officer
—
—
—
13,774
0.0006%
$1.86M
—
Fleming Michael
SVP Chief Ethics & Com Officer
—
—
—
10,283
0.0004%
$1.39M
+612.5%
Scholefield James H
EVP,Chief Info&Digital Officer
—
—
—
7,142
0.0003%
$964.17K
—
LeCointe-Cephas Lisa
SVP Chief Ethics & Com Officer
—
—
—
5,142
0.0002%
$694.13K
+287.6%
Garay Arpa
SVP Human Health Global Mktg.
—
—
—
2,109
<0.0001%
$284.72K
+627.2%

Individual transactions

42
Insider
Date
Role
Action
Shares
Price
Amount
Guindo Chirfi
13 Aug 2026
EVP, Access, Policy & Comms
Sell
10,000
$135.00
$1.35M
DeLuca Richard R.
12 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
600
$132.04
$79.22K
DeLuca Richard R.
12 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
11,099
$131.61
$1.46M
DeLuca Richard R.
11 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
5,427
$132.35
$718.26K
DeLuca Richard R.
11 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
7,410
$131.33
$973.16K
DeLuca Richard R.
10 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
20,784
$130.43
$2.71M
Guindo Chirfi
6 Aug 2026
EVP, Access, Policy & Comms
Sell
15,000
$131.00
$1.97M
DeLuca Richard R.
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
300
$131.02
$39.31K
DeLuca Richard R.
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
4,945
$130.23
$643.99K
DeLuca Richard R.
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
805
$131.02
$105.47K
Guindo Chirfi
12 Feb 2026
Chief Marketing Officer
Sell
10,000
$121.46
$1.21M
Li Dean Y
10 Feb 2026
Executive VP & President, MRL
Sell
10,235
$117.52
$1.20M
Guindo Chirfi
9 Feb 2026
Chief Marketing Officer
Sell
10,000
$118.41
$1.18M
DeLuca Richard R.
6 Feb 2026
EVP&Pres, Merck Animal Heallth
Sell
37,685
$120.92
$4.56M
Oosthuizen Johannes Jacobus
6 Feb 2026
President, U.S. Market
Sell
15,000
$121.87
$1.83M
Guindo Chirfi
5 Feb 2026
Chief Marketing Officer
Sell
20,000
$121.88
$2.44M
Davis Robert M
4 Feb 2026
Chairman, CEO & President
Sell
32,462
$118.35
$3.84M
Davis Robert M
4 Feb 2026
Chairman, CEO & President
Sell
14,972
$117.38
$1.76M
Downing Cristal N
10 Nov 2025
Chief Comm. & Public Afrs Ofcr
Sell
7,085
$87.00
$616.40K
Williams David Michael
3 Nov 2025
EVP,Chief Info&Digital Officer
Sell
8,614
$83.59
$720.04K
Oosthuizen Johannes Jacobus
19 Feb 2025
President, U.S. Market
Sell
8,500
$84.09
$714.74K
Williams David Michael
13 Feb 2025
EVP,Chief Info&Digital Officer
Sell
6,000
$85.34
$512.06K
Downing Cristal N
6 Feb 2025
Chief Comm. & Public Afrs Ofcr
Sell
2,361
$88.76
$209.55K
Romanelli Joseph
13 Feb 2024
President, Human Health Int?l
Sell
1,000
$124.89
$124.89K
Williams David Michael
7 Feb 2024
EVP,Chief Info&Digital Officer
Sell
1,451
$127.57
$185.11K
Oosthuizen Johannes Jacobus
9 Nov 2023
President, U.S. Market
Sell
2,081
$102.38
$213.06K
DeLuca Richard R.
8 Nov 2023
EVP&Pres, Merck Animal Heallth
Sell
43,823
$105.03
$4.60M
MIZELL STEVEN
14 Aug 2023
EVP, Chief HR Officer
Sell
4,250
$109.01
$463.29K
MIZELL STEVEN
3 Aug 2023
EVP, Chief HR Officer
Sell
4,500
$105.49
$474.70K
Romanelli Joseph
2 Aug 2023
President, Human Health Int?l
Sell indirect
59
$107.37
$6.33K
Romanelli Joseph
2 Aug 2023
President, Human Health Int?l
Sell
30
$107.37
$3.22K
Zachary Jennifer
4 May 2023
EVP, General Counsel
Sell
19,141
$117.59
$2.25M
Romanelli Joseph
24 Mar 2023
President, Human Health Int?l
Sell
35
$104.65
$3.66K
Romanelli Joseph
15 Feb 2023
President, Human Health Int?l
Sell
5,000
$108.22
$541.10K
MIZELL STEVEN
13 Feb 2023
EVP, Chief HR Officer
Sell
1,815
$109.10
$198.02K
MIZELL STEVEN
9 Feb 2023
EVP, Chief HR Officer
Sell
5,000
$107.00
$535.01K
MIZELL STEVEN
6 Feb 2023
EVP, Chief HR Officer
Sell
4,436
$104.25
$462.47K
Oosthuizen Johannes Jacobus
9 Nov 2022
President, U.S. Market
Sell
1,795
$103.21
$185.26K
Oosthuizen Johannes Jacobus
28 Oct 2022
President, U.S. Market
Sell
3,633
$100.21
$364.06K
FRAZIER KENNETH C
9 Nov 2020
Chairman, President & CEO
Sell
144,866
$81.74
$11.84M
FRAZIER KENNETH C
9 Nov 2020
Chairman, President & CEO
Sell
135,134
$81.08
$10.96M
Chattopadhyay Sanat
13 Aug 2020
Exe V-P & Pres. MMD
Sell
10,380
$83.01
$861.68K
Showing 250 of 308 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 757
Amendments (4/A) skipped 7
Filings about a different issuer 4
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 143
Sales at will 49
Transactions with no price 0
Shares from compensation/vesting 12,345,980
Sales filed before the plan box existed 16
History held since 1 Sep 2016