Guindo Chirfi
SEC CIK 1722753 · EDGAR
BoughtSold
Most active insiders at MRK, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Zachary Jennifer | EVP, GC | — | $25.20M |
| 2 | DeLuca Richard R. | EVP, Pres, Merck Animal Heallth | — | $11.29M |
| 3 | Guindo Chirfi | EVP, Access, Policy, Comms | — | $8.15M |
| 4 | Williams David Michael | EVP, Chief Info, Digital Off | — | $8.13M |
| 5 | Davis Robert M | COB, CEO, Pres, Dir | — | $5.60M |
| 6 | Litchfield Caroline | EVP, CFO | — | $5.02M |
| 7 | Li Dean Y | Pres, Executive VP, MRL | — | $2.99M |
| 8 | Maraldo David R. | EVP, Pres. MMD | — | $2.41M |
| 9 | Oosthuizen Johannes Jacobus | Pres, U.S. Market | — | $1.83M |
| 10 | Smart Dalton E. III | SVP Fin. - Gbl Ctrl | — | $766.0K |
Transactions 20
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-13 17:02 | 2026-08-13 | MRK | Merck & Co. | Guindo Chirfi | EVP, Access, Policy, Comms | S - Sale | $135.00 | -10.0K | 36.6K | -21% | -$1.35M | |
| 2026-08-07 16:17 | 2026-08-06 | MRK | Merck & Co. | Guindo Chirfi | EVP, Access, Policy, Comms | S - Sale | $131.00 | -15.0K | 46.6K | -24% | -$1.97M | |
| D | 2026-05-01 18:54 | 2026-04-29 | MRK | Merck & Co. | Guindo Chirfi | EVP, Access, Policy, Comms | M - OptEx | $110.03 | +1,967 | 62.6K | +3% | +$216.4K |
| D | 2026-05-01 18:54 | 2026-04-29 | MRK | Merck & Co. | Guindo Chirfi | EVP, Access, Policy, Comms | F - Tax | $110.03 | -969 | 61.6K | -2% | -$106.6K |
| 2026-02-12 | 2026-02-12 | MRK | Merck & Co. | Guindo Chirfi | CMO | S - Sale | $121.46 | -10.0K | 60.6K | -14% | -$1.21M | |
| 2026-02-09 | 2026-02-09 | MRK | Merck & Co. | Guindo Chirfi | CMO | S - Sale | $118.41 | -10.0K | 70.6K | -12% | -$1.18M | |
| 2026-02-06 | 2026-02-05 | MRK | Merck & Co. | Guindo Chirfi | CMO | S - Sale | $121.88 | -20.0K | 80.6K | -20% | -$2.44M | |
| 2026-01-28 | 2026-01-26 | MRK | Merck & Co. | Guindo Chirfi | CMO | A - Grant | $107.40 | +9,865 | 100.6K | +11% | +$1.06M | |
| D | 2025-08-05 | 2025-08-04 | MRK | Merck & Co. | Guindo Chirfi | CMO | M - OptEx | $79.29 | +36.9K | 107.4K | +52% | +$2.93M |
| D | 2025-08-05 | 2025-08-04 | MRK | Merck & Co. | Guindo Chirfi | CMO | F - Tax | $79.29 | -18.2K | 89.2K | -17% | -$1.44M |
| 2025-01-29 | 2025-01-27 | MRK | Merck & Co. | Guindo Chirfi | CMO | A - Grant | $97.94 | +28.2K | 69.1K | +69% | +$2.76M | |
| D | 2024-08-06 | 2024-08-05 | MRK | Merck & Co. | Guindo Chirfi | CMO | M - OptEx | $115.20 | +36.9K | 57.8K | +177% | +$4.25M |
| D | 2024-08-06 | 2024-08-05 | MRK | Merck & Co. | Guindo Chirfi | CMO | F - Tax | $115.20 | -17.4K | 40.4K | -30% | -$2.01M |
| D | 2023-08-04 | 2023-08-03 | MRK | Merck & Co. | Guindo Chirfi | CMO | M - OptEx | $105.70 | +36.9K | 38.3K | +2,561% | +$3.90M |
| D | 2023-08-04 | 2023-08-03 | MRK | Merck & Co. | Guindo Chirfi | CMO | F - Tax | $105.70 | -18.0K | 20.4K | -47% | -$1.90M |
| D | 2022-02-23 | 2022-02-18 | BIIB | Biogen | Guindo Chirfi | Head of Glob Prod Strat, Com | M - OptEx | $0.00 | +1,981 | 8,243 | +32% | $0 |
| D | 2022-02-23 | 2022-02-18 | BIIB | Biogen | Guindo Chirfi | Head of Glob Prod Strat, Com | F - Tax | $209.79 | -879 | 7,364 | -11% | -$184.4K |
| DM | 2022-02-15 | 2022-02-12 | BIIB | Biogen | Guindo Chirfi | Head of Glob Prod Strat, Com | F - Tax | $214.59 | -2,342 | 6,708 | -26% | -$502.6K |
| DM | 2022-02-15 | 2022-02-12 | BIIB | Biogen | Guindo Chirfi | Head of Glob Prod Strat, Com | M - OptEx | $0.00 | +2,597 | 7,268 | +56% | $0 |
| 2022-01-21 | 2022-01-19 | BIIB | Biogen | Guindo Chirfi | Head of Glob Prod Strat, Com | A - Grant | $0.00 | +3,088 | 6,007 | +106% | $0 |
Purchase Sale Sale after option exercise All abbreviations