MRK

Merck & Co., Inc.

Pharmaceutical PreparationsNYSELarge accelerated filer

Total Trades

90

Buys

1

Sells

56

Largest Trade

N/A

Insiders

15

Activist Filings

5

Insider Trades

InsiderTitleTypeValueSharesPriceDate
Guindo ChirfiChief Marketing Of…SELL$1M+10K$121.46Feb 12, 2026
Li Dean YExecutive VP & PresidentSELL$1M+10K$117.52Feb 10, 2026
Guindo ChirfiChief Marketing Of…SELL$1M+10K$118.41Feb 9, 2026
Zachary JenniferEVP, General CounselEXERCISE$1M+122K$119.15Feb 9, 2026
Zachary JenniferEVP, General CounselSELL$1M+122K$119.15Feb 9, 2026
Williams David MichaelEVPSELL$500K+5K$121.91Feb 6, 2026
Williams David MichaelEVPEXERCISE$100K–$500K5K$77.62Feb 6, 2026
Smart Dalton E. IIISVP Fin. - Global …SELL$500K+6K$119.67Feb 6, 2026
Smart Dalton E. IIISVP Fin. - Global …EXERCISE$100K–$500K4K$62.07Feb 6, 2026
Oosthuizen Johannes JacobusPresidentSELL$1M+15K$121.87Feb 6, 2026
Litchfield CarolineEVP & CFOEXERCISE$1M+42K$53.06Feb 6, 2026
Litchfield CarolineEVP & CFOSELL$1M+42K$119.61Feb 6, 2026
Li Dean YExecutive VP & PresidentSELL$1M+15K$118.77Feb 6, 2026
Li Dean YExecutive VP & PresidentEXERCISE$500K+15K$56.04Feb 6, 2026
Guindo ChirfiChief Marketing Of…SELL$1M+20K$121.88Feb 6, 2026
DeLuca Richard R.EVP&PresSELL$1M+38K$120.92Feb 6, 2026
Davis Robert MChairmanSELL$1M+47K$118.04Feb 6, 2026
Downing Cristal NChief Comm. & Publ…SELL$500K+7K$87.00Nov 12, 2025
Williams David MichaelEVPSELL$500K+9K$83.59Nov 4, 2025
Smart Dalton E. IIISVP Fin. - Global …SELL$100K–$500K4K$82.76Apr 29, 2025
Smart Dalton E. IIISVP Fin. - Global …EXERCISE$100K–$500K5K$58.08Apr 29, 2025
Litchfield CarolineEVP & CFOEXERCISE$1M+38K$58.08Feb 15, 2024
Litchfield CarolineEVP & CFOSELL$1M+38K$125.50Feb 15, 2024
Davis Robert MChairmanEXERCISE$1M+235K$74.02Feb 15, 2024
Davis Robert MChairmanSELL$1M+235K$125.69Feb 15, 2024
Romanelli JosephPresidentSELL$100K–$500K1K$124.89Feb 14, 2024
Li Dean YExecutive VP & PresidentEXERCISE$500K+15K$62.07Feb 12, 2024
Li Dean YExecutive VP & PresidentSELL$1M+15K$125.50Feb 12, 2024
Williams David MichaelEVPSELL$100K–$500K1K$127.57Feb 8, 2024
Oosthuizen Johannes JacobusPresidentSELL$1M+19K$127.17Feb 5, 2024
Oosthuizen Johannes JacobusPresidentEXERCISE$1M+21K$78.80Feb 5, 2024
MIZELL STEVENEVPEXERCISE$1M+33K$73.65Feb 2, 2024
MIZELL STEVENEVPSELL$1M+51K$126.65Feb 2, 2024
Zachary JenniferEVP, General CounselEXERCISE$1M+19K$87.10Feb 2, 2024
Zachary JenniferEVP, General CounselSELL$1M+49K$126.97Feb 2, 2024
Oosthuizen Johannes JacobusPresidentSELL$100K–$500K2K$102.38Nov 13, 2023
DeLuca Richard R.EVP&PresSELL$1M+44K$105.03Nov 9, 2023
MIZELL STEVENEVPSELL$100K–$500K4K$109.01Aug 15, 2023
MIZELL STEVENEVPSELL$100K–$500K5K$105.49Aug 4, 2023
Romanelli JosephPresidentSELL$1K–$15K89$107.37Aug 3, 2023
Romanelli JosephPresidentBUY$15K–$50K409$108.40Jun 30, 2023
Romanelli JosephPresidentSELL$1K–$15K35$104.65Jun 30, 2023
MIZELL STEVENEVPEXERCISE$1M+52K$75.55May 5, 2023
MIZELL STEVENEVPSELL$1M+53K$119.01May 5, 2023
Zachary JenniferEVP, General CounselSELL$1M+19K$117.59May 5, 2023
Karachun Rita ASr. VP Fince-Globa…SELL$1M+16K$117.53May 5, 2023
Karachun Rita ASr. VP Fince-Globa…EXERCISE$1M+18K$67.64May 5, 2023
Williams David MichaelEVPEXERCISE$100K–$500K7K$61.23May 3, 2023
Williams David MichaelEVPSELL$500K+8K$116.82May 3, 2023
DeLuca Richard R.EVP&PresSELL$1M+142K$115.55May 2, 2023
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Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

The Vanguard Group

SC 13G/A · Mar 6, 2025

10.0%

253.3M shares

The Vanguard Group - 23-1945930

SC 13G/A · Feb 13, 2024

9.7%

244.8M shares

BlackRock, Inc.

SC 13G/A · Jan 26, 2024

8.0%

201.8M shares

BlackRock, Inc.

SC 13G/A · Feb 3, 2023

8.5%

215.0M shares

BlackRock, Inc.

SC 13G/A · Jan 31, 2022

7.8%

198.2M shares

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