Sanat Chattopadhyay serves as Executive at Merck & Co., Inc., where they oversee executive responsibilities. Since joining the company, Sanat Chattopadhyay has executed 40 insider transactions totaling $45.6M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 20, 2026 involved receiving (via award) 2,449 shares valued at $150.0K.
Sanat Chattopadhyay currently holds 6,711 shares of Merck & Co., Inc. (MRK), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Sanat Chattopadhyay has been a net seller of MRK stock. They have purchased $0 and sold $45.6M worth of shares.
Sanat Chattopadhyay's most recent insider trade was on Jan 20, 2026, when they sold 2,449 shares at $61.23 per share.
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| $119.43 |
| Discretionary |
| Apr 13, 2023 | MRK | $7.6M | Sale | 66,163 | $115.06 | Discretionary |
| Apr 13, 2023 | MRK | $3.8M | Option Exercise | 67,892 | $56.04 | Discretionary |
| Apr 13, 2023 | MRK | $7.8M | Sale | 67,892 | $115.07 | Discretionary |
| Apr 13, 2023 | MRK | $4.1M | Option Exercise | 66,163 | $62.07 | Discretionary |
| Jan 23, 2023 | MRK | $1.9M | Award | 17,495 | $109.88 | Discretionary |
| Jan 9, 2023 | MRK | $444.4K | Sale | 3,940 | $112.78 | Discretionary |
| Jan 9, 2023 | MRK | $4.5M | Option Exercise | 83,994 | $53.06 | Discretionary |
| Jan 9, 2023 | MRK | $194.8K | Sale | 1,702 | $114.46 | Discretionary |
| Jan 9, 2023 | MRK | $4.3M | Sale | 38,216 | $113.78 | Discretionary |
| Jan 9, 2023 | MRK | $507.0K | Sale | 4,538 | $111.73 | Discretionary |
| Jan 9, 2023 | MRK | $3.9M | Sale | 35,598 | $110.61 | Discretionary |
| Oct 28, 2022 | MRK | $10.0M | Sale | 100,292 | $100.10 | Discretionary |
| Oct 28, 2022 | MRK | $0 | Option Exercise | 51,055 | $N/A | Discretionary |
| Oct 28, 2022 | MRK | $0 | Option Exercise | 34,024 | $N/A | Discretionary |
| Oct 28, 2022 | MRK | $0 | Option Exercise | 15,213 | $N/A | Discretionary |
| Feb 24, 2022 | MRK | $1.5M | Award | 19,836 | $73.51 | Discretionary |
| Oct 29, 2021 | MRK | $0 | Option Exercise | 24,619 | $N/A | Discretionary |
| Oct 29, 2021 | MRK | $2.1M | Sale | 24,619 | $87.32 | Discretionary |
| Feb 26, 2021 | MRK | $1.9M | Award | 25,772 | $72.62 | Discretionary |
| Aug 13, 2020 | MRK | $861.6K | Sale | 10,380 | $83.01 | Discretionary |
| Feb 28, 2020 | MRK | $1.2M | Award | 15,785 | $76.56 | Discretionary |
| Feb 25, 2019 | MRK | $834.3K | Award | 10,380 | $80.38 | Discretionary |
| Feb 12, 2019 | MRK | $1.1M | Option Exercise | 29,851 | $36.56 | Discretionary |
| Feb 12, 2019 | MRK | $1.7M | Option Exercise | 43,876 | $39.29 | Discretionary |
| Feb 12, 2019 | MRK | $5.8M | Sale | 73,727 | $78.62 | Discretionary |
| Aug 3, 2018 | MRK | $1.9M | Sale | 29,208 | $65.20 | Discretionary |
| Aug 3, 2018 | MRK | $643.3K | Option Exercise | 19,208 | $33.49 | Discretionary |
| Aug 3, 2018 | MRK | $374.9K | Option Exercise | 10,000 | $37.49 | Discretionary |