Updated Jul 16, 2026
Guindo Chirfi has filed 3 SEC Form 4 filings across 2 companies in the last 90 days — selling. Lifetime open-market sales: $4.84M.
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-01 | MRK | Merck & Co., Inc. | F — Tax withholding / forfeiture | 969 | $110.03 | $107K |
| 2026-05-01 | MRK | Merck & Co., Inc. | M — Option exercise | 2.0K | $110.03 | $216K |
| 2026-02-12 | MRK | Merck & Co., Inc. | S — Open-market sale | 10.0K | $121.46 | $1.21M |
| 2026-02-09 | MRK | Merck & Co., Inc. | S — Open-market sale | 10.0K | $118.41 | $1.18M |
| 2026-02-06 | MRK | Merck & Co., Inc. | S — Open-market sale | 20.0K | $121.88 | $2.44M |
| 2026-01-28 | MRK | Merck & Co., Inc. | A — Grant or award | 9.9K | $107.40 | $1.06M |
| 2025-08-04 | MRK | Merck & Co., Inc. | F — Tax withholding / forfeiture | 18.2K | $79.29 | $1.44M |
| 2025-08-04 | MRK | Merck & Co., Inc. | M — Option exercise | 36.9K | $79.29 | $2.93M |
Guindo Chirfi is a corporate insider — currently tracked as Insider of Beam Therapeutics Inc. (BEAM). InsiderAlpha tracks every SEC Form 4 filing in real time.
3 primary Form 4 filings in the last 90 days, covering 2 companies.
Recorded transactions: 0 open-market purchases () and 3 open-market sales ($4.84M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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