SEC CIK 1372455
Posner Brian S
Reported ownership across 2 companies, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| BIIBview stock → | 8,175 | 2021-07-01 |
| ACGLview stock → | 0 | 2026-06-03 |
Position History — ACGL
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — ACGL
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-06-03 | Open-market sale | 3,000 | $19.66 | 0 |
| 2026-05-11 | Open-market sale | 2,000 | $17.14 | 0 |
| 2026-05-05 | Grant / award | 2,071 | — | 122,175 |
| 2026-03-11 | Open-market sale | 3,000 | $17.11 | 2,000 |
| 2025-08-01 | Open-market buy | 1,000 | $17.34 | 5,000 |
| 2025-05-07 | Grant / award | 1,564 | — | 120,104 |
| 2024-05-09 | Grant / award | 1,455 | — | 118,540 |
| 2023-05-04 | Grant / award | 1,714 | — | 117,085 |
| 2022-10-28 | Open-market buy | 2,000 | $17.60 | 4,000 |
| 2022-05-04 | Grant / award | 2,642 | — | 115,371 |
| 2022-05-04 | Grant / award | 2,642 | — | 112,729 |
| 2022-04-29 | Open-market buy | 2,000 | $19.23 | 2,000 |
| 2021-09-30 | Disposition to issuer | 2,000 | $25.00 | 0 |
| 2021-06-14 | Open-market sale | 4,000 | $25.24 | 2,000 |
| 2021-05-06 | Grant / award | 3,143 | — | 110,087 |
| 2021-05-06 | Grant / award | 3,143 | — | 106,944 |
| 2020-05-13 | Open-market buy | 1,000 | $22.16 | 103,801 |
| 2020-05-07 | Grant / award | 5,058 | — | 97,743 |
| 2020-05-07 | Grant / award | 5,058 | — | 102,801 |
| 2020-05-06 | Open-market buy | 1,000 | $23.72 | 92,685 |
| 2019-05-08 | Grant / award | 3,726 | — | 88,853 |
| 2019-05-08 | Grant / award | 2,832 | — | 91,685 |
| 2018-11-28 | Open-market buy | 500 | $28.24 | 85,127 |
| 2018-11-28 | Open-market buy | 500 | $21.86 | 3,000 |
| 2018-11-05 | Open-market buy | 2,500 | $22.45 | 2,500 |
| 2018-05-09 | Grant / award | 1,196 | — | 28,209 |
| 2018-05-09 | Grant / award | 1,574 | — | 27,013 |
| 2018-05-03 | Open-market buy | 2,000 | $79.25 | 24,439 |
| 2018-05-03 | Open-market buy | 1,000 | $77.38 | 25,439 |
| 2018-01-02 | Disposition to issuer | 2,146 | $25.00 | 0 |
| 2017-09-25 | Disposition to issuer | 695 | $25.00 | 2,146 |
| 2017-09-18 | Disposition to issuer | 4,659 | $25.00 | 2,841 |
| 2017-05-04 | Grant / award | 771 | — | 22,439 |
| 2017-05-04 | Grant / award | 1,286 | — | 21,668 |
| 2016-11-18 | Open-market buy | 6,000 | $21.88 | 6,000 |
| 2016-05-06 | Grant / award | 1,777 | — | 19,316 |
| 2016-05-06 | Grant / award | 1,066 | — | 20,382 |
| 2015-05-07 | Grant / award | 1,201 | — | 17,539 |
| 2015-05-07 | Grant / award | 1,601 | — | 16,338 |
| 2014-05-09 | Grant / award | 1,317 | — | 14,737 |
| 2014-05-09 | Grant / award | 1,756 | — | 13,420 |
| 2013-08-19 | Open-market buy | 2,500 | $23.58 | 7,500 |
| 2013-08-02 | Open-market buy | 5,000 | $25.25 | 5,000 |
| 2013-05-09 | Grant / award | 1,401 | — | 10,263 |
| 2013-05-09 | Grant / award | 1,401 | — | 11,664 |
| 2012-05-09 | Grant / award | 1,944 | — | 8,862 |
| 2012-05-09 | Grant / award | 1,944 | — | 6,918 |
| 2011-11-04 | Grant / award | 332 | — | 332 |
| 2011-05-06 | Grant / award | 589 | — | 1,658 |
| 2011-05-06 | Grant / award | 737 | — | 1,069 |
| 2010-11-04 | — | — | — | 0 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.