Insider · CIK 0001722753
Chirfi Guindo
Files at: MRK, BEAM, BIIB. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 13, 2026 SForm 4 → | Aug 13, 5:02 pm EDT | Merck & Co., Inc.MRK | 10,000 | $135.00 | $1,350,000 | 36,613 | −21.5% | |
| Aug 6, 2026 SForm 4 → | Aug 7, 4:17 pm EDT | Merck & Co., Inc.MRK | 15,000 | $131.00 | $1,965,000 | 46,613 | −24.3% | |
| Dec 1, 2018 FMForm 4 → | Dec 4, 8:21 pm EST | BIOGEN INC.BIIB | 1,011 | $333.72 | $136,491 | 2,543 | — | plan? |
| Dec 1, 2017 AForm 4 → | Dec 5, 4:41 pm EST | BIOGEN INC.BIIB | 2,350 | — | — | 2,350 | — | plan? amended |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 3, 2026 AForm 4 → | Jun 5, 4:05 pm EDT | Beam Therapeutics Inc.BEAM | 19,676 | — | — | 19,676 | — | |
| Feb 12, 2019 AForm 4 → | Feb 14, 6:11 pm EST | BIOGEN INC.BIIB | 10,960 | — | — | 10,960 | — | |
| Dec 1, 2018 JMForm 4 → | Dec 4, 8:21 pm EST | BIOGEN INC.BIIB | 1,168 | — | — | 2,342 | — | |
| Dec 1, 2017 AForm 4/A → | Jan 8, 2018, 4:31 pm EST | BIOGEN INC.BIIB | 3,510 | — | — | 3,510 | — | |
| Dec 1, 2017 AForm 4 → | Dec 5, 4:41 pm EST | BIOGEN INC.BIIB | 1,755 | — | — | 1,755 | — | amended |