- Corporate Officers - G
- Guindo Chirfi
Insider Trading History of Guindo Chirfi
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Guindo Chirfi since 2018.
This trader's CIK number is 1722753.
At the time of last reporting, Guindo Chirfi was the Chief Marketing Officer of Merck & Co., Inc.. (stock ticker symbol MRK).
Also see all insider trading activities at Merck & Co., Inc..
Note that in the past
Guindo Chirfi also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Biogen Inc. (BIIB) by Guindo Chirfi
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2022 | BIIB | 0 | $0 | 0 | $0 | 4,578 | $0 |
| 2021 | BIIB | 0 | $0 | 0 | $0 | 3,156 | $0 |
| 2020 | BIIB | 0 | $0 | 0 | $0 | 2,161 | $0 |
| 2019 | BIIB | 0 | $0 | 0 | $0 | 543 | $0 |
| 2018 | BIIB | 0 | $0 | 0 | $0 | 602 | $0 |
Yearly summary of insider trading at Merck & Co., Inc. (MRK) by Guindo Chirfi
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | MRK | 0 | $0 | 0 | $0 | 36,903 | $2,926,038 |
| 2024 | MRK | 0 | $0 | 0 | $0 | 36,901 | $4,250,995 |
| 2023 | MRK | 0 | $0 | 0 | $0 | 36,901 | $3,900,435 |
Insider trading activities at 2 companies by Guindo Chirfi:
1. Biogen Inc. (BIIB)
2. Merck & Co., Inc. (MRK)
Table 1. Insider trading of Biogen Inc. (BIIB) by Guindo Chirfi
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2022-02-18 | BIIB | Option Ex | 1,981 | .00 | 0 |
| 2022-02-12 | BIIB | Option Ex | 2,597 | .00 | 0 |
| 2021-02-12 | BIIB | Option Ex | 3,156 | .00 | 0 |
| 2020-12-01 | BIIB | Option Ex | 481 | .00 | 0 |
| 2020-02-12 | BIIB | Option Ex | 1,680 | .00 | 0 |
| 2019-12-01 | BIIB | Option Ex | 543 | .00 | 0 |
| 2018-12-01 | BIIB | Option Ex | 602 | .00 | 0 |
Table 2. Insider trading of Merck & Co., Inc. (MRK) by Guindo Chirfi
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-08-04 | MRK | Option Ex | 36,903 | 79.29 | 2,926,038 |
| 2024-08-05 | MRK | Option Ex | 36,901 | 115.20 | 4,250,995 |
| 2023-08-03 | MRK | Option Ex | 36,901 | 105.70 | 3,900,435 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Guindo Chirfi
(Chief Marketing Officer of Merck & Co., Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.