Guindo Chirfi, Chief Marketing Officer at Merck & Co., Inc. ($MRK), sold about 4.8 million dollars worth of company shares on the open market in three transactions over the last year. His most recent sale occurred on February 12, 2026. These sales rank 1,987th among 11,678 insiders in our database by total value sold, below the average of 8.6 million dollars across 6.4 transactions per insider. Chirfi made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 12, 2026 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | S | Common Stock | 10000 | $121.46 | 60,615.1270 | 2,514,000,000 | 14.16% | 0.00% |
| Feb. 9, 2026 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | S | Common Stock | 10000 | $118.41 | 70,615.1270 | 2,514,000,000 | 12.40% | 0.00% |
| Feb. 5, 2026 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | S | Common Stock | 20000 | $121.88 | 80,615.1270 | 2,514,000,000 | 19.88% | 0.00% |
| Jan. 26, 2026 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | A | Common Stock | 9865 | $107.40 | 100,615.1270 | 2,514,000,000 | 10.87% | 0.00% |
| Aug. 4, 2025 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | M | Common Stock | 36903 | $79.29 | 107,408.9730 | 2,541,000,000 | 52.34% | 0.00% |
| Aug. 4, 2025 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | F | Common Stock | 18175 | $79.29 | 89,233.9730 | 2,541,000,000 | 16.92% | 0.00% |
| Aug. 4, 2025 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | M | Restricted Stock Unit | 36903 | $0.00 | 0.0000 | 2,541,000,000 | 100.00% | 0.00% |
| June 4, 2025 | Beam Therapeutics Inc. | $BEAM | Guindo Chirfi | Not found | A | Stock Option (Right to Buy) | 33662 | $0.00 | 33,662.0000 | 82,313,008 | 9999.99% | 0.04% |
| April 29, 2025 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | A | Stock Option (Right to Buy) | 26867 | $0.00 | 26,867.0000 | 2,541,000,000 | 9999.99% | 0.00% |
| April 29, 2025 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | A | Restricted Stock Unit | 5902 | $0.00 | 5,902.0000 | 2,541,000,000 | 9999.99% | 0.00% |
| Jan. 27, 2025 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | A | Common Stock | 28158 | $97.94 | 69,143.9180 | 2,541,000,000 | 68.70% | 0.00% |
| Dec. 2, 2024 | Beam Therapeutics Inc. | $BEAM | Guindo Chirfi | Not found | A | Stock Option (Right to Buy) | 39086 | $0.00 | 39,086.0000 | 82,410,095 | 9999.99% | 0.05% |
| Aug. 5, 2024 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | F | Common Stock | 17412 | $115.20 | 40,369.5930 | 2,547,000,000 | 30.13% | 0.00% |
| Aug. 5, 2024 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | M | Restricted Stock Unit | 36901 | $0.00 | 36,903.0000 | 2,547,000,000 | 50.00% | 0.00% |
| Aug. 5, 2024 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | M | Common Stock | 36901 | $115.20 | 57,781.5930 | 2,547,000,000 | 176.72% | 0.00% |
| April 30, 2024 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | A | Stock Option (Right to Buy) | 29297 | $0.00 | 29,297.0000 | 2,547,000,000 | 9999.99% | 0.00% |
| Aug. 3, 2023 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | F | Common Stock | 17989 | $105.70 | 20,352.6840 | 2,542,000,000 | 46.92% | 0.00% |
| Aug. 3, 2023 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | M | Common Stock | 36901 | $105.70 | 38,341.6840 | 2,542,000,000 | 2561.35% | 0.00% |
| Aug. 3, 2023 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | M | Restricted Stock Unit | 36901 | $0.00 | 73,804.0000 | 2,542,000,000 | 33.33% | 0.00% |
| May 2, 2023 | Merck & Co., Inc. | $MRK | Guindo Chirfi | Chief Marketing Officer | A | Stock Option (Right to Buy) | 34578 | $0.00 | 34,578.0000 | 2,542,000,000 | 9999.99% | 0.00% |