Guindo Chirfi (CIK 1722753) reported 10 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-08-13). Recent activity: Sell MRK (10,000 shares), Sell MRK (15,000 shares), Buy MRK (1,967 shares), Sell MRK (969 shares), Sell MRK (10,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-13 | Merck & Co., Inc. (MRK) | EVP, Access, Policy & Comms | Sell | 10,000 | $1.4M |
| 2026-08-07 | Merck & Co., Inc. (MRK) | EVP, Access, Policy & Comms | Sell | 15,000 | $2.0M |
| 2026-05-01 | Merck & Co., Inc. (MRK) | EVP, Access, Policy & Comms | Buy | 1,967 | $216,429 |
| 2026-05-01 | Merck & Co., Inc. (MRK) | EVP, Access, Policy & Comms | Sell | 969 | $106,619 |
| 2026-02-12 | Merck & Co., Inc. (MRK) | Chief Marketing Officer | Sell | 10,000 | $1.2M |
| 2026-02-09 | Merck & Co., Inc. (MRK) | Chief Marketing Officer | Sell | 10,000 | $1.2M |
| 2026-02-06 | Merck & Co., Inc. (MRK) | Chief Marketing Officer | Sell | 20,000 | $2.4M |
| 2026-01-28 | Merck & Co., Inc. (MRK) | Chief Marketing Officer | Buy | 9,865 | $1.1M |
| 2025-08-05 | Merck & Co., Inc. (MRK) | Chief Marketing Officer | Buy | 36,903 | $2.9M |
| 2025-08-05 | Merck & Co., Inc. (MRK) | Chief Marketing Officer | Sell | 18,175 | $1.4M |
Source: SEC Form 4 filings · as of 2026-08-13