Merck & Co., Inc. (MRK) has 20 known insider and institutional holders on record. The largest holder is FRAZIER KENNETH C with 470,769 shares. Other notable holders include Davis Robert M and DeLuca Richard R..
Over the last 12 months, insiders have made 74 transactions in MRK stock — 48 buys (valued at $16.03M) and 9 sells (valued at $17.6M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
MRK Insider Ownership
Top Holder
FRAZIER KENNETH C
470,769 shares
Buys (12 mo)
48
$16.03M value
Sells (12 mo)
9
$17.6M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Frazier Kenneth C |
Executive Chair |
470,769 |
2022-11-07 |
|
| 2 |
Davis Robert M |
Chairman, CEO & President |
443,602 |
2026-02-06 |
|
| 3 |
Deluca Richard R. |
EVP&pres, Merck Animal Heallth |
160,174 |
2026-02-06 |
|
| 4 |
Perlmutter Roger M |
Exe V-p & Pres, Mrl |
151,029 |
2020-05-05 |
|
| 5 |
Wendell Peter C |
Director |
124,753 |
2024-03-29 |
|
| 6 |
Glocer Thomas H |
Director |
108,293 |
2026-04-01 |
|
| 7 |
Weeks Wendell P |
Director |
92,486 |
2020-04-02 |
|
| 8 |
Li Dean Y |
Executive VP & President, Mrl |
92,035 |
2026-02-10 |
|
| 9 |
Litchfield Caroline |
EVP & CFO |
90,192 |
2026-01-28 |
|
| 10 |
Lazarus Rochelle B |
Director |
87,596 |
2020-04-02 |
|
| 11 |
Zachary Jennifer |
EVP, General Counsel |
68,916 |
2026-01-28 |
|
| 12 |
Guindo Chirfi |
Chief Marketing Officer |
60,615 |
2026-02-12 |
|
| 13 |
Russo Patricia F |
Director |
58,523 |
2025-06-03 |
|
| 14 |
Brun Leslie A |
Director |
49,719 |
2021-06-02 |
|
| 15 |
Gerberding Julie L. |
EVP, Chief Patient Officer |
48,712 |
2022-02-28 |
|
| 16 |
Mizell Steven |
EVP, Chief HR Officer |
41,319 |
2024-01-24 |
|
| 17 |
Cech Thomas R |
Director |
40,238 |
2020-06-02 |
|
| 18 |
Clyburn Frank |
EVP & Pres ? Human Health |
39,479 |
2021-11-04 |
|
| 19 |
Rothman Paul |
Director |
31,991 |
2025-06-03 |
|
| 20 |
Craig Pamela J. |
Director |
31,991 |
2025-06-03 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-31 |
Seidman Christine E |
Director |
RSU Award |
68 |
- |
- |
| 2026-03-31 |
Coe Mary Ellen |
Director |
RSU Award |
249 |
- |
- |
| 2026-03-31 |
Glocer Thomas H |
Director |
RSU Award |
405 |
- |
- |
| 2026-03-02 |
Foard Brian |
Officer |
Unknown |
- |
- |
- |
| 2026-02-12 |
Guindo Chirfi |
Chief Marketing Officer |
Informative Sell |
10,000 |
$121.46 |
$1.21M |
| 2026-02-10 |
Li Dean Y |
Executive VP & President, Mrl |
Informative Sell |
10,235 |
$117.52 |
$1.2M |
| 2026-02-09 |
Zachary Jennifer |
EVP, General Counsel |
Option Exercise (Sell) |
38,835 |
$87.10 |
$3.38M |
| 2026-02-09 |
Guindo Chirfi |
Chief Marketing Officer |
Informative Sell |
10,000 |
$118.41 |
$1.18M |
| 2026-02-04 |
Smart Dalton E. Iii |
SVP Fin. - Global Controller |
Option Exercise (Sell) |
4,000 |
$62.07 |
$248.28K |
| 2026-02-06 |
Oosthuizen Johannes Jacobus |
President, U.s. Market |
Informative Sell |
15,000 |
$121.87 |
$1.83M |
| 2026-02-04 |
Litchfield Caroline |
EVP & CFO |
Option Exercise (Sell) |
41,997 |
$53.06 |
$2.23M |
| 2026-02-04 |
Li Dean Y |
Executive VP & President, Mrl |
Option Exercise (Sell) |
15,087 |
$56.04 |
$845.48K |
| 2026-02-06 |
Williams David Michael |
EVP,chief Info&digital Officer |
Option Exercise (Sell) |
5,000 |
$77.62 |
$388.1K |
| 2026-02-05 |
Guindo Chirfi |
Chief Marketing Officer |
Informative Sell |
20,000 |
$121.88 |
$2.44M |
| 2026-02-06 |
Deluca Richard R. |
EVP&pres, Merck Animal Heallth |
Informative Sell |
37,685 |
$120.92 |
$4.56M |
| 2026-02-04 |
Davis Robert M |
Chairman, CEO & President |
Informative Sell |
32,462 |
$118.35 |
$3.84M |
| 2026-01-26 |
Smart Dalton E. Iii |
SVP Fin. - Global Controller |
RSU Award |
1,066 |
$107.40 |
$114.49K |
| 2026-01-26 |
Romanelli Joseph |
President, Human Health Int?l |
RSU Award |
5,703 |
$107.40 |
$612.5K |
| 2026-01-26 |
Oosthuizen Johannes Jacobus |
President, U.s. Market |
RSU Award |
5,026 |
$107.40 |
$539.79K |
| 2026-01-26 |
Litchfield Caroline |
EVP & CFO |
RSU Award |
15,852 |
$107.40 |
$1.7M |
| 2026-01-26 |
Li Dean Y |
Executive VP & President, Mrl |
RSU Award |
20,469 |
$107.40 |
$2.2M |
| 2026-01-26 |
Williams David Michael |
EVP,chief Info&digital Officer |
RSU Award |
6,112 |
$107.40 |
$656.43K |
| 2026-01-26 |
Zachary Jennifer |
EVP, General Counsel |
RSU Award |
11,583 |
$107.40 |
$1.24M |
| 2026-01-26 |
Guindo Chirfi |
Chief Marketing Officer |
RSU Award |
9,865 |
$107.40 |
$1.06M |
| 2026-01-26 |
Chattopadhyay Sanat |
Exe V-p & Pres. Mmd |
RSU Award |
13,880 |
$107.40 |
$1.49M |
