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
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Guindo Chirfi | Chief Marketing Of… | SELL | $1M+ | 10K | $121.46 | Feb 12, 2026 |
| Li Dean Y | Executive VP & President | SELL | $1M+ | 10K | $117.52 | Feb 10, 2026 |
| Guindo Chirfi | Chief Marketing Of… | SELL | $1M+ | 10K | $118.41 | Feb 9, 2026 |
| Zachary Jennifer | EVP, General Counsel | EXERCISE | $1M+ | 122K | $119.15 | Feb 9, 2026 |
| Zachary Jennifer | EVP, General Counsel | SELL | $1M+ | 122K | $119.15 | Feb 9, 2026 |
| Williams David Michael | EVP | SELL | $500K+ | 5K | $121.91 | Feb 6, 2026 |
| Williams David Michael | EVP | EXERCISE | $100K–$500K | 5K | $77.62 | Feb 6, 2026 |
| Smart Dalton E. III | SVP Fin. - Global … | SELL | $500K+ | 6K | $119.67 | Feb 6, 2026 |
| Smart Dalton E. III | SVP Fin. - Global … | EXERCISE | $100K–$500K | 4K | $62.07 | Feb 6, 2026 |
| Oosthuizen Johannes Jacobus | President | SELL | $1M+ | 15K | $121.87 | Feb 6, 2026 |
| Litchfield Caroline | EVP & CFO | EXERCISE | $1M+ | 42K | $53.06 | Feb 6, 2026 |
| Litchfield Caroline | EVP & CFO | SELL | $1M+ | 42K | $119.61 | Feb 6, 2026 |
| Li Dean Y | Executive VP & President | SELL | $1M+ | 15K | $118.77 | Feb 6, 2026 |
| Li Dean Y | Executive VP & President | EXERCISE | $500K+ | 15K | $56.04 | Feb 6, 2026 |
| Guindo Chirfi | Chief Marketing Of… | SELL | $1M+ | 20K | $121.88 | Feb 6, 2026 |
| DeLuca Richard R. | EVP&Pres | SELL | $1M+ | 38K | $120.92 | Feb 6, 2026 |
| Davis Robert M | Chairman | SELL | $1M+ | 47K | $118.04 | Feb 6, 2026 |
| Downing Cristal N | Chief Comm. & Publ… | SELL | $500K+ | 7K | $87.00 | Nov 12, 2025 |
| Williams David Michael | EVP | SELL | $500K+ | 9K | $83.59 | Nov 4, 2025 |
| Smart Dalton E. III | SVP Fin. - Global … | SELL | $100K–$500K | 4K | $82.76 | Apr 29, 2025 |
| Smart Dalton E. III | SVP Fin. - Global … | EXERCISE | $100K–$500K | 5K | $58.08 | Apr 29, 2025 |
| Litchfield Caroline | EVP & CFO | EXERCISE | $1M+ | 38K | $58.08 | Feb 15, 2024 |
| Litchfield Caroline | EVP & CFO | SELL | $1M+ | 38K | $125.50 | Feb 15, 2024 |
| Davis Robert M | Chairman | EXERCISE | $1M+ | 235K | $74.02 | Feb 15, 2024 |
| Davis Robert M | Chairman | SELL | $1M+ | 235K | $125.69 | Feb 15, 2024 |
| Romanelli Joseph | President | SELL | $100K–$500K | 1K | $124.89 | Feb 14, 2024 |
| Li Dean Y | Executive VP & President | EXERCISE | $500K+ | 15K | $62.07 | Feb 12, 2024 |
| Li Dean Y | Executive VP & President | SELL | $1M+ | 15K | $125.50 | Feb 12, 2024 |
| Williams David Michael | EVP | SELL | $100K–$500K | 1K | $127.57 | Feb 8, 2024 |
| Oosthuizen Johannes Jacobus | President | SELL | $1M+ | 19K | $127.17 | Feb 5, 2024 |
| Oosthuizen Johannes Jacobus | President | EXERCISE | $1M+ | 21K | $78.80 | Feb 5, 2024 |
| MIZELL STEVEN | EVP | EXERCISE | $1M+ | 33K | $73.65 | Feb 2, 2024 |
| MIZELL STEVEN | EVP | SELL | $1M+ | 51K | $126.65 | Feb 2, 2024 |
| Zachary Jennifer | EVP, General Counsel | EXERCISE | $1M+ | 19K | $87.10 | Feb 2, 2024 |
| Zachary Jennifer | EVP, General Counsel | SELL | $1M+ | 49K | $126.97 | Feb 2, 2024 |
| Oosthuizen Johannes Jacobus | President | SELL | $100K–$500K | 2K | $102.38 | Nov 13, 2023 |
| DeLuca Richard R. | EVP&Pres | SELL | $1M+ | 44K | $105.03 | Nov 9, 2023 |
| MIZELL STEVEN | EVP | SELL | $100K–$500K | 4K | $109.01 | Aug 15, 2023 |
| MIZELL STEVEN | EVP | SELL | $100K–$500K | 5K | $105.49 | Aug 4, 2023 |
| Romanelli Joseph | President | SELL | $1K–$15K | 89 | $107.37 | Aug 3, 2023 |
| Romanelli Joseph | President | BUY | $15K–$50K | 409 | $108.40 | Jun 30, 2023 |
| Romanelli Joseph | President | SELL | $1K–$15K | 35 | $104.65 | Jun 30, 2023 |
| MIZELL STEVEN | EVP | EXERCISE | $1M+ | 52K | $75.55 | May 5, 2023 |
| MIZELL STEVEN | EVP | SELL | $1M+ | 53K | $119.01 | May 5, 2023 |
| Zachary Jennifer | EVP, General Counsel | SELL | $1M+ | 19K | $117.59 | May 5, 2023 |
| Karachun Rita A | Sr. VP Fince-Globa… | SELL | $1M+ | 16K | $117.53 | May 5, 2023 |
| Karachun Rita A | Sr. VP Fince-Globa… | EXERCISE | $1M+ | 18K | $67.64 | May 5, 2023 |
| Williams David Michael | EVP | EXERCISE | $100K–$500K | 7K | $61.23 | May 3, 2023 |
| Williams David Michael | EVP | SELL | $500K+ | 8K | $116.82 | May 3, 2023 |
| DeLuca Richard R. | EVP&Pres | SELL | $1M+ | 142K | $115.55 | May 2, 2023 |
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Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
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
SC 13G/A · Jan 26, 2024
8.0%
201.8M shares
SC 13G/A · Feb 3, 2023
8.5%
215.0M shares
SC 13G/A · Jan 31, 2022
7.8%
198.2M shares