There have been 50 recent insider transactions recorded for Merck & Co., Inc. (MRK), including 33 buys and 16 sells. Total insider buying was valued at $16.03M and total insider selling at $24.7M.
Notable insiders with recent activity include Glocer Thomas H, Coe Mary Ellen, Seidman Christine E. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — MRK
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-03-31 |
Glocer Thomas H |
Director |
RSU Award |
405 |
- |
- |
108,293 |
| 2026-03-31 |
Coe Mary Ellen |
Director |
RSU Award |
249 |
- |
- |
29,703 |
| 2026-03-31 |
Seidman Christine E |
Director |
RSU Award |
68 |
- |
- |
19,238 |
| 2026-03-02 |
Foard Brian |
Officer |
Unknown |
- |
- |
- |
- |
| 2026-02-12 |
Guindo Chirfi |
Chief Marketing Officer |
Informative Sell |
10,000 |
$121.46 |
$1.21M |
60,615 |
| 2026-02-10 |
Li Dean Y |
Executive VP & President, Mrl |
Informative Sell |
10,235 |
$117.52 |
$1.2M |
92,035 |
| 2026-02-09 |
Guindo Chirfi |
Chief Marketing Officer |
Informative Sell |
10,000 |
$118.41 |
$1.18M |
70,615 |
| 2026-02-09 |
Zachary Jennifer |
EVP, General Counsel |
Option Exercise (Sell) |
38,835 |
$87.10 |
$3.38M |
- |
| 2026-02-06 |
Deluca Richard R. |
EVP&pres, Merck Animal Heallth |
Informative Sell |
37,685 |
$120.92 |
$4.56M |
160,174 |
| 2026-02-06 |
Williams David Michael |
EVP,chief Info&digital Officer |
Option Exercise (Sell) |
5,000 |
$77.62 |
$388.1K |
4,600 |
| 2026-02-06 |
Oosthuizen Johannes Jacobus |
President, U.s. Market |
Informative Sell |
15,000 |
$121.87 |
$1.83M |
21,197 |
| 2026-02-05 |
Guindo Chirfi |
Chief Marketing Officer |
Informative Sell |
20,000 |
$121.88 |
$2.44M |
80,615 |
| 2026-02-04 |
Davis Robert M |
Chairman, CEO & President |
Informative Sell |
32,462 |
$118.35 |
$3.84M |
443,602 |
| 2026-02-04 |
Li Dean Y |
Executive VP & President, Mrl |
Option Exercise (Sell) |
15,087 |
$56.04 |
$845.48K |
- |
| 2026-02-04 |
Litchfield Caroline |
EVP & CFO |
Option Exercise (Sell) |
41,997 |
$53.06 |
$2.23M |
- |
| 2026-02-04 |
Smart Dalton E. Iii |
SVP Fin. - Global Controller |
Option Exercise (Sell) |
4,000 |
$62.07 |
$248.28K |
8,130 |
| 2026-01-26 |
Davis Robert M |
Chairman, CEO & President |
RSU Award |
47,434 |
$107.40 |
$5.09M |
491,036 |
| 2026-01-26 |
Deluca Richard R. |
EVP&pres, Merck Animal Heallth |
RSU Award |
12,264 |
$107.40 |
$1.32M |
197,859 |
| 2026-01-26 |
Chattopadhyay Sanat |
Exe V-p & Pres. Mmd |
RSU Award |
13,880 |
$107.40 |
$1.49M |
13,880 |
| 2026-01-26 |
Guindo Chirfi |
Chief Marketing Officer |
RSU Award |
9,865 |
$107.40 |
$1.06M |
100,615 |
| 2026-01-26 |
Zachary Jennifer |
EVP, General Counsel |
RSU Award |
11,583 |
$107.40 |
$1.24M |
68,916 |
| 2026-01-26 |
Williams David Michael |
EVP,chief Info&digital Officer |
RSU Award |
6,112 |
$107.40 |
$656.43K |
30,838 |
| 2026-01-26 |
Li Dean Y |
Executive VP & President, Mrl |
RSU Award |
20,469 |
$107.40 |
$2.2M |
102,270 |
| 2026-01-26 |
Litchfield Caroline |
EVP & CFO |
RSU Award |
15,852 |
$107.40 |
$1.7M |
90,192 |
| 2026-01-26 |
Oosthuizen Johannes Jacobus |
President, U.s. Market |
RSU Award |
5,026 |
$107.40 |
$539.79K |
36,197 |
| 2026-01-26 |
Romanelli Joseph |
President, Human Health Int?l |
RSU Award |
5,703 |
$107.40 |
$612.5K |
28,739 |
| 2026-01-26 |
Smart Dalton E. Iii |
SVP Fin. - Global Controller |
RSU Award |
1,066 |
$107.40 |
$114.49K |
10,605 |
| 2025-12-31 |
Glocer Thomas H |
Director |
RSU Award |
463 |
- |
- |
107,076 |
| 2025-12-31 |
Coe Mary Ellen |
Director |
RSU Award |
285 |
- |
- |
29,232 |
| 2025-12-31 |
Seidman Christine E |
Director |
RSU Award |
77 |
- |
- |
19,026 |
| 2025-11-10 |
Downing Cristal N |
Chief Comm. & Public Afrs Ofcr |
Informative Sell |
7,085 |
$87.00 |
$616.4K |
- |
| 2025-11-03 |
Williams David Michael |
EVP,chief Info&digital Officer |
Informative Sell |
8,614 |
$83.59 |
$720.04K |
24,578 |
| 2025-09-30 |
Glocer Thomas H |
Director |
RSU Award |
581 |
- |
- |
105,646 |
| 2025-09-30 |
Coe Mary Ellen |
Director |
RSU Award |
357 |
- |
- |
28,685 |
| 2025-09-30 |
Seidman Christine E |
Director |
RSU Award |
97 |
- |
- |
18,776 |
| 2025-08-04 |
Guindo Chirfi |
Chief Marketing Officer |
Option Exercise (Sell) |
36,903 |
- |
- |
- |
| 2025-08-04 |
Williams David Michael |
EVP,chief Info&digital Officer |
Option Exercise (Sell) |
17,119 |
- |
- |
- |
| 2025-06-30 |
Glocer Thomas H |
Director |
RSU Award |
616 |
- |
- |
104,041 |
| 2025-06-30 |
Coe Mary Ellen |
Director |
RSU Award |
379 |
- |
- |
28,052 |
| 2025-06-30 |
Seidman Christine E |
Director |
RSU Award |
103 |
- |
- |
18,496 |
| 2025-05-30 |
Russo Patricia F |
Director |
RSU Award |
2,863 |
- |
- |
58,523 |
| 2025-05-30 |
Lavizzo-mourey Risa J |
Director |
RSU Award |
2,863 |
- |
- |
15,367 |
| 2025-05-30 |
Glocer Thomas H |
Director |
RSU Award |
2,863 |
- |
- |
103,425 |
| 2025-05-30 |
Baker Douglas M Jr |
Director |
RSU Award |
2,863 |
- |
- |
9,344 |
| 2025-05-30 |
Craig Pamela J. |
Director |
RSU Award |
2,863 |
- |
- |
31,991 |
| 2025-05-30 |
Thulin Inge G |
Director |
RSU Award |
2,863 |
- |
- |
24,764 |
| 2025-05-30 |
Warden Kathy J |
Director |
RSU Award |
2,863 |
- |
- |
15,504 |
| 2025-05-30 |
Rothman Paul |
Director |
RSU Award |
2,863 |
- |
- |
31,991 |
| 2025-05-30 |
Coe Mary Ellen |
Director |
RSU Award |
2,863 |
- |
- |
27,673 |
| 2025-05-30 |
Karsanbhai Surendralal Lanca |
Director |
RSU Award |
2,863 |
- |
- |
3,421 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
