SEC CIK 1722753
Guindo Chirfi
Reported ownership across 2 companies, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| MRKview stock → | 36,613.127 | 2026-08-13 |
| BIIBview stock → | 7,364 | 2022-02-18 |
Position History — BIIB
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — BIIB
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2022-02-18 | J (derivative) | 2,851 | $0.00 | 9,668 |
| 2022-02-18 | Option exercise (derivative) | 1,981 | $0.00 | 12,519 |
| 2022-02-18 | Tax withholding | 879 | $209.79 | 7,364 |
| 2022-02-18 | Option exercise | 1,981 | $0.00 | 8,243 |
| 2022-02-12 | J (derivative) | 2,395 | $0.00 | 0 |
| 2022-02-12 | Option exercise (derivative) | 1,336 | $0.00 | 6,298 |
| 2022-02-12 | J (derivative) | 2,480 | $0.00 | 3,818 |
| 2022-02-12 | Option exercise (derivative) | 1,261 | $0.00 | 2,395 |
| 2022-02-12 | Option exercise | 1,261 | $0.00 | 7,268 |
| 2022-02-12 | Tax withholding | 560 | $214.59 | 6,708 |
| 2022-02-12 | Option exercise | 1,336 | $0.00 | 8,044 |
| 2022-02-12 | Tax withholding | 1,189 | $214.59 | 6,262 |
| 2022-02-12 | Tax withholding | 593 | $214.59 | 7,451 |
| 2022-02-10 | Grant / award (derivative) | 9,090 | $0.00 | 9,090 |
| 2022-01-19 | Grant / award | 3,088 | $0.00 | 6,007 |
| 2021-06-07 | Open-market sale | 3,087 | $440.00 | 2,919 |
| 2021-02-18 | Grant / award (derivative) | 14,500 | $0.00 | 14,500 |
| 2021-02-12 | Option exercise (derivative) | 1,534 | $0.00 | 5,774 |
| 2021-02-12 | J (derivative) | 2,118 | $0.00 | 3,656 |
| 2021-02-12 | Option exercise (derivative) | 1,622 | $0.00 | 9,828 |
| 2021-02-12 | J (derivative) | 2,194 | $0.00 | 7,634 |
| 2021-02-12 | Tax withholding | 477 | $278.03 | 6,006 |
| 2021-02-12 | Tax withholding | 463 | $278.03 | 6,483 |
| 2021-02-12 | Option exercise | 1,534 | $0.00 | 5,324 |
| 2021-02-12 | Option exercise | 1,622 | $0.00 | 6,946 |
| 2020-12-01 | Option exercise (derivative) | 481 | $0.00 | 693 |
| 2020-12-01 | J (derivative) | 693 | $0.00 | 0 |
| 2020-12-01 | Tax withholding | 214 | $243.16 | 3,790 |
| 2020-12-01 | Tax withholding | 348 | $243.16 | 3,523 |
| 2020-12-01 | Option exercise | 481 | $0.00 | 4,004 |
| 2020-02-12 | J (derivative) | 1,972 | $0.00 | 7,308 |
| 2020-02-12 | Grant / award (derivative) | 11,450 | $0.00 | 11,450 |
| 2020-02-12 | Option exercise (derivative) | 1,680 | $0.00 | 9,280 |
| 2020-02-12 | Option exercise | 1,680 | $0.00 | 4,375 |
| 2020-02-12 | Tax withholding | 504 | $331.76 | 3,871 |
| 2019-12-01 | Option exercise (derivative) | 543 | $0.00 | 1,799 |
| 2019-12-01 | J (derivative) | 625 | $0.00 | 1,174 |
| 2019-12-01 | Tax withholding | 160 | $299.81 | 2,695 |
| 2019-12-01 | Option exercise | 543 | $0.00 | 2,855 |
| 2019-12-01 | Tax withholding | 231 | $299.81 | 2,312 |
| 2019-02-12 | Grant / award (derivative) | 10,960 | $0.00 | 10,960 |
| 2018-12-01 | Option exercise (derivative) | 602 | $0.00 | 2,908 |
| 2018-12-01 | J (derivative) | 566 | $0.00 | 2,342 |
| 2018-12-01 | Tax withholding | 178 | $333.72 | 2,543 |
| 2018-12-01 | Option exercise | 602 | $0.00 | 2,721 |
| 2018-12-01 | Tax withholding | 231 | $333.72 | 2,119 |
| 2017-12-01 | Grant / award (derivative) | 1,755 | $0.00 | 1,755 |
| 2017-12-01 | Grant / award | 2,350 | $0.00 | 2,350 |
| 2017-12-01 | Grant / award (derivative) | 3,510 | $0.00 | 3,510 |
| 2017-11-07 | — | — | — | 0 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.