Dudediligence.

Merck & Co., Inc

MRKNYSE · Pharmaceutical Preparations
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$72.0M

22 notices · 584,348 sh

Oct 2025 to Oct 2026

Reported ·

$42.0M

18 sales · 0 buys

Oct 2025 to Jun 2026

The two figures cover different periods.

None of the 18 reported sales carry the 10b5-1 box. Together they are 0.01% of the shares on issue.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-08-13: CHIRFI GUINDO, Form 1442026-08-12: RICHARD ROBERT DELUCA JR, Form 1442026-08-12: JENNIFER L ZACHARY, Form 1442026-08-11: RICHARD ROBERT DELUCA JR, Form 1442026-08-10: RICHARD ROBERT DELUCA JR, Form 1442026-08-06: CHIRFI GUINDO, Form 1442026-08-06: RICHARD ROBERT DELUCA JR, Form 1442026-08-05: DAVID M WILLIAMS, Form 1442026-08-05: DAVID MARALDO, Form 1442026-02-09: CHIRFI GUINDO, Form 1442026-02-10: DEAN LI, Form 1442026-02-09: JENNIFER ZACHARY, Form 1442026-02-06: RICHARD ROBERT DELUCA JR., Form 1442026-02-06: DAVID WILLIAMS, Form 1442026-02-06: JOHANNES JACOBUS OOSTHUIZEN, Form 1442026-02-05: CHIRFI GUINDO, Form 1442026-02-04: DALTON SMART, Form 1442026-02-04: ROBERT M. DAVIS, Form 1442026-02-04: DEAN LI, Form 1442026-02-04: CAROLINE A LITCHFIELD, Form 1442025-11-10: CRISTAL DOWNING, Form 1442025-11-03: DAVID WILLIAMS, Form 1442025-11-03: Williams David Michael, sold2025-11-10: Downing Cristal N, sold2026-02-04: Davis Robert M, sold2026-02-04: Li Dean Y, sold2026-02-04: Litchfield Caroline, sold2026-02-04: Smart Dalton E. III, sold2026-02-05: Guindo Chirfi, sold2026-02-06: DeLuca Richard R., sold2026-02-06: Oosthuizen Johannes Jacobus, sold2026-02-06: Williams David Michael, sold2026-02-09: Zachary Jennifer, sold2026-02-09: Guindo Chirfi, sold2026-02-10: Li Dean Y, sold2026-02-12: Guindo Chirfi, sold
under a no plan named▼ salesize is dollars

Form 144 notices, newest first

2026-08-13CHIRFI GUINDO, EVP, Access, Policy & Comms$1,350,000
10,000 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-12RICHARD ROBERT DELUCA JR, EVP&Pres, Merck Animal Heallth$1,539,992
11,699 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-12JENNIFER L ZACHARY, EVP, General Counsel$10.7M
80,315 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-11RICHARD ROBERT DELUCA JR, EVP&Pres, Merck Animal Heallth$1,691,426
12,837 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-10RICHARD ROBERT DELUCA JR, EVP&Pres, Merck Animal Heallth$2,710,951
20,784 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-06CHIRFI GUINDO, EVP, Access, Policy & Comms$1,965,000
15,000 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-06RICHARD ROBERT DELUCA JR, EVP&Pres, Merck Animal Heallth$788,773
6,050 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-05DAVID M WILLIAMS, EVP,Chief Info&Digital Officer$6,805,145
52,847 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-05DAVID MARALDO, EVP & Pres. MMD$2,407,797
18,706 shno plan dateForm 4s on file end Jun 23144 ↗
2026-02-10DEAN LI, Executive VP & President, MRL$1,202,844
10,235 shno plan date144 ↗
Form 4, 2026-02-10: sold 10,235 at $117.52 Form 4 ↗
2026-02-09CHIRFI GUINDO, EVP, Access, Policy & Comms$2,368,202
20,000 shno plan date144 ↗
Form 4, 2026-02-09: sold 10,000 at $118.41 Form 4 ↗
2026-02-09JENNIFER ZACHARY, EVP, General Counsel$14.5M
121,573 shno plan date144 ↗
Form 4, 2026-02-09: sold 121,573 at $119.15 Form 4 ↗
2026-02-06RICHARD ROBERT DELUCA JR., EVP&Pres, Merck Animal Heallth$4,557,025
37,685 shno plan date144 ↗
Form 4, 2026-02-06: sold 37,685 at $120.92 Form 4 ↗
2026-02-06DAVID WILLIAMS, EVP,Chief Info&Digital Officer$609,525
5,000 shno plan date144 ↗
Form 4, 2026-02-06: sold 5,000 at $121.91 Form 4 ↗
2026-02-06JOHANNES JACOBUS OOSTHUIZEN, EVP, Oncology & Int?l$1,827,992
15,000 shno plan date144 ↗
Form 4, 2026-02-06: sold 15,000 at $121.87 Form 4 ↗
2026-02-05CHIRFI GUINDO, EVP, Access, Policy & Comms$2,437,676
20,000 shno plan date144 ↗
Form 4, 2026-02-06: sold 20,000 at $121.88 Form 4 ↗
2026-02-04DALTON SMART, SVP Fin. - Global Controller$765,920
6,400 shno plan date144 ↗
Form 4, 2026-02-06: sold 6,400 at $119.68 Form 4 ↗
2026-02-04ROBERT M. DAVIS, Chairman, CEO & President$5,598,137
47,434 shno plan date144 ↗
Form 4, 2026-02-06: sold 47,434 at $118.04 Form 4 ↗
2026-02-04DEAN LI, Executive VP & President, MRL$1,791,824
15,087 shno plan date144 ↗
Form 4, 2026-02-06: sold 15,087 at $118.77 Form 4 ↗
2026-02-04CAROLINE A LITCHFIELD, EVP & CFO$5,023,312
41,997 shno plan date144 ↗
Form 4, 2026-02-06: sold 41,997 at $119.61 Form 4 ↗
2025-11-10CRISTAL DOWNING, Chief Comm. & Public Afrs Ofcr$616,395
7,085 shno plan date144 ↗
Form 4, 2025-11-12: sold 7,085 at $87.00 Form 4 ↗
2025-11-03DAVID WILLIAMS, EVP,Chief Info&Digital Officer$720,040
8,614 shno plan date144 ↗
Form 4, 2025-11-04: sold 8,614 at $83.59 Form 4 ↗