Guindo Chirfi
Insider CIK 1722753 · BEAM Director · MRK EVP, Access, Policy & Comms · BIIB Head of Glob Prod Strat & Com
Trades across companies
| Ticker | Code | Trade | Filed | Shares | Price | Value | Owned after | |
|---|---|---|---|---|---|---|---|---|
| MRK Merck & Co., Inc. | S Sale | 2026-08-13 | 2026-08-13 | 10,000 | $135.00 | $1.35M | 36,613 | SEC↗ |
| MRK Merck & Co., Inc. | S Sale | 2026-08-13 | 2026-08-13 | 10,000 | $135.00 | $1.35M | 36,613 | SEC↗ |
| MRK Merck & Co., Inc. | S Sale | 2026-08-06 | 2026-08-07 | 15,000 | $131.00 | $1.97M | 46,613 | SEC↗ |
| MRK Merck & Co., Inc. | S Sale | 2026-08-06 | 2026-08-07 | 15,000 | $131.00 | $1.97M | 46,613 | SEC↗ |
| BEAM Beam Therapeutics Inc. | A Award deriv | 2026-06-03 | 2026-06-05 | 19,676 | — | $0 | 19,676 | SEC↗ |
| MRK Merck & Co., Inc. | A Award deriv | 2026-05-05 | 2026-05-07 | 19,402 | — | $0 | 19,402 | SEC↗ |
| MRK Merck & Co., Inc. | A Award deriv | 2026-05-05 | 2026-05-07 | 6,628 | — | $0 | 6,628 | SEC↗ |
| MRK Merck & Co., Inc. | M Exercise deriv | 2026-04-29 | 2026-05-01 | 1,967 | — | $0 | 3,935 | SEC↗ |
| MRK Merck & Co., Inc. | M Exercise | 2026-04-29 | 2026-05-01 | 1,967 | $110.03 | $216.4K | 62,582 | SEC↗ |
| MRK Merck & Co., Inc. | F Tax w/h | 2026-04-29 | 2026-05-01 | 969 | $110.03 | $106.6K | 61,613 | SEC↗ |
| MRK Merck & Co., Inc. | S Sale | 2026-02-12 | 2026-02-12 | 10,000 | $121.46 | $1.21M | 60,615 | SEC↗ |
| MRK Merck & Co., Inc. | S Sale | 2026-02-09 | 2026-02-09 | 10,000 | $118.41 | $1.18M | 70,615 | SEC↗ |
| MRK Merck & Co., Inc. | S Sale | 2026-02-05 | 2026-02-06 | 20,000 | $121.88 | $2.44M | 80,615 | SEC↗ |
| MRK Merck & Co., Inc. | A Award | 2026-01-26 | 2026-01-28 | 9,865 | $107.40 | $1.06M | 100,615 | SEC↗ |
| MRK Merck & Co., Inc. | M Exercise deriv | 2025-08-04 | 2025-08-05 | 36,903 | — | $0 | 0 | SEC↗ |
| MRK Merck & Co., Inc. | F Tax w/h | 2025-08-04 | 2025-08-05 | 18,175 | $79.29 | $1.44M | 89,234 | SEC↗ |
| MRK Merck & Co., Inc. | M Exercise | 2025-08-04 | 2025-08-05 | 36,903 | $79.29 | $2.93M | 107,409 | SEC↗ |
| BEAM Beam Therapeutics Inc. | A Award deriv | 2025-06-04 | 2025-06-06 | 33,662 | — | $0 | 33,662 | SEC↗ |
| MRK Merck & Co., Inc. | A Award deriv | 2025-04-29 | 2025-05-01 | 26,867 | — | $0 | 26,867 | SEC↗ |
| MRK Merck & Co., Inc. | A Award deriv | 2025-04-29 | 2025-05-01 | 5,902 | — | $0 | 5,902 | SEC↗ |
| MRK Merck & Co., Inc. | A Award | 2025-01-27 | 2025-01-29 | 28,158 | $97.94 | $2.76M | 69,144 | SEC↗ |
| BEAM Beam Therapeutics Inc. | A Award deriv | 2024-12-02 | 2024-12-04 | 39,086 | — | $0 | 39,086 | SEC↗ |
| MRK Merck & Co., Inc. | M Exercise deriv | 2024-08-05 | 2024-08-06 | 36,901 | — | $0 | 36,903 | SEC↗ |
| MRK Merck & Co., Inc. | F Tax w/h | 2024-08-05 | 2024-08-06 | 17,412 | $115.20 | $2.01M | 40,370 | SEC↗ |
| MRK Merck & Co., Inc. | M Exercise | 2024-08-05 | 2024-08-06 | 36,901 | $115.20 | $4.25M | 57,782 | SEC↗ |
| MRK Merck & Co., Inc. | A Award deriv | 2024-04-30 | 2024-05-02 | 29,297 | — | $0 | 29,297 | SEC↗ |
| MRK Merck & Co., Inc. | M Exercise deriv | 2023-08-03 | 2023-08-04 | 36,901 | — | $0 | 73,804 | SEC↗ |
| MRK Merck & Co., Inc. | F Tax w/h | 2023-08-03 | 2023-08-04 | 17,989 | $105.70 | $1.90M | 20,353 | SEC↗ |
| MRK Merck & Co., Inc. | M Exercise | 2023-08-03 | 2023-08-04 | 36,901 | $105.70 | $3.90M | 38,342 | SEC↗ |
| MRK Merck & Co., Inc. | A Award deriv | 2023-05-02 | 2023-05-04 | 34,578 | — | $0 | 34,578 | SEC↗ |
| MRK Merck & Co., Inc. | A Award deriv | 2022-08-03 | 2022-08-04 | 110,705 | — | $0 | 110,705 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2022-02-18 | 2022-02-23 | 2,851 | — | $0 | 9,668 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2022-02-18 | 2022-02-23 | 1,981 | — | $0 | 12,519 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2022-02-18 | 2022-02-23 | 879 | $209.79 | $184.4K | 7,364 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2022-02-18 | 2022-02-23 | 1,981 | — | $0 | 8,243 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2022-02-12 | 2022-02-15 | 2,395 | — | $0 | 0 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2022-02-12 | 2022-02-15 | 1,336 | — | $0 | 6,298 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2022-02-12 | 2022-02-15 | 2,480 | — | $0 | 3,818 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2022-02-12 | 2022-02-15 | 1,261 | — | $0 | 2,395 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2022-02-12 | 2022-02-15 | 1,261 | — | $0 | 7,268 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2022-02-12 | 2022-02-15 | 560 | $214.59 | $120.2K | 6,708 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2022-02-12 | 2022-02-15 | 1,336 | — | $0 | 8,044 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2022-02-12 | 2022-02-15 | 1,189 | $214.59 | $255.1K | 6,262 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2022-02-12 | 2022-02-15 | 593 | $214.59 | $127.3K | 7,451 | SEC↗ |
| BIIB BIOGEN INC. | A Award deriv | 2022-02-10 | 2022-02-14 | 9,090 | — | $0 | 9,090 | SEC↗ |
| BIIB BIOGEN INC. | A Award | 2022-01-19 | 2022-01-21 | 3,088 | — | $0 | 6,007 | SEC↗ |
| BIIB BIOGEN INC. | S Sale | 2021-06-07 | 2021-06-09 | 3,087 | $440.00 | $1.36M | 2,919 | SEC↗ |
| BIIB BIOGEN INC. | A Award deriv | 2021-02-18 | 2021-02-22 | 14,500 | — | $0 | 14,500 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2021-02-12 | 2021-02-17 | 1,534 | — | $0 | 5,774 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2021-02-12 | 2021-02-17 | 2,118 | — | $0 | 3,656 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2021-02-12 | 2021-02-17 | 1,622 | — | $0 | 9,828 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2021-02-12 | 2021-02-17 | 2,194 | — | $0 | 7,634 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2021-02-12 | 2021-02-17 | 477 | $278.03 | $132.6K | 6,006 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2021-02-12 | 2021-02-17 | 463 | $278.03 | $128.7K | 6,483 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2021-02-12 | 2021-02-17 | 1,534 | — | $0 | 5,324 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2021-02-12 | 2021-02-17 | 1,622 | — | $0 | 6,946 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2020-12-01 | 2020-12-03 | 481 | — | $0 | 693 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2020-12-01 | 2020-12-03 | 693 | — | $0 | 0 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2020-12-01 | 2020-12-03 | 214 | $243.16 | $52.0K | 3,790 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2020-12-01 | 2020-12-03 | 348 | $243.16 | $84.6K | 3,523 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2020-12-01 | 2020-12-03 | 481 | — | $0 | 4,004 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2020-02-12 | 2020-02-14 | 1,972 | — | $0 | 7,308 | SEC↗ |
| BIIB BIOGEN INC. | A Award deriv | 2020-02-12 | 2020-02-14 | 11,450 | — | $0 | 11,450 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2020-02-12 | 2020-02-14 | 1,680 | — | $0 | 9,280 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2020-02-12 | 2020-02-14 | 1,680 | — | $0 | 4,375 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2020-02-12 | 2020-02-14 | 504 | $331.76 | $167.2K | 3,871 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2019-12-01 | 2019-12-03 | 543 | — | $0 | 1,799 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2019-12-01 | 2019-12-03 | 625 | — | $0 | 1,174 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2019-12-01 | 2019-12-03 | 160 | $299.81 | $48.0K | 2,695 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2019-12-01 | 2019-12-03 | 543 | — | $0 | 2,855 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2019-12-01 | 2019-12-03 | 231 | $299.81 | $69.3K | 2,312 | SEC↗ |
| BIIB BIOGEN INC. | A Award deriv | 2019-02-12 | 2019-02-14 | 10,960 | — | $0 | 10,960 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise deriv | 2018-12-01 | 2018-12-04 | 602 | — | $0 | 2,908 | SEC↗ |
| BIIB BIOGEN INC. | J Other deriv | 2018-12-01 | 2018-12-04 | 566 | — | $0 | 2,342 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2018-12-01 | 2018-12-04 | 178 | $333.72 | $59.4K | 2,543 | SEC↗ |
| BIIB BIOGEN INC. | M Exercise | 2018-12-01 | 2018-12-04 | 602 | — | $0 | 2,721 | SEC↗ |
| BIIB BIOGEN INC. | F Tax w/h | 2018-12-01 | 2018-12-04 | 231 | $333.72 | $77.1K | 2,119 | SEC↗ |
| BIIB BIOGEN INC. | A Award deriv | 2017-12-01 | 2018-01-08 | 3,510 | — | $0 | 3,510 | SEC↗ |
| BIIB BIOGEN INC. | A Award deriv | 2017-12-01 | 2017-12-05 | 1,755 | — | $0 | 1,755 | SEC↗ |
| BIIB BIOGEN INC. | A Award | 2017-12-01 | 2017-12-05 | 2,350 | — | $0 | 2,350 | SEC↗ |