InsidersTradesSigma
Total declarations
Companies
▲ Purchases (4 ops.)
▼ Sales (5 ops.)
Insider track record
Board DirectorDisclosed buys
4
Disclosed sells
5
T+90 hit rate
44%
T+90 mean return
-1.6%
Across 9 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Discover the full record of transactions filed by Posner Brian S, Director. Director active across 3 companies, notably Arch Capital Group Ltd.. Cumulatively, 19 filings have been published. Split: 4 buys · 5 sells. Total volume traded: €498k. History available since 4 June 2021. The latest transaction was disclosed on 26 May 2026 (Acquisition). Regulator: SEC (Form 4). The full history is accessible without signup.
Declarations19 total
2,000 shares@ US$18.210.0010% mcap45.9% of flowCommon StockSEC:0001193125-26-245237:0
Ideal exit: 20 Feb 2027 (T+270)
2,500 shares@ US$17.120.0012% mcap54.1% of flowCommon StockSEC:0001193125-26-236877:0
Ideal exit: 14 Feb 2027 (T+270)
2,000 shares@ US$17.14150.0001% mcap8.2% of flowDepositary Shares, Series GSEC:0001372455-26-000006:0
1,564 sharesCommon Shares, $.0011 par value per shareSEC:0001415889-25-012562:0
1,455 sharesCommon Shares, $.0011 par value per shareSEC:0001415889-24-013065:0
1,714 sharesCommon Shares, $.0011 par value per shareSEC:0001415889-23-007585:0
2,000 shares@ US$17.6010.0% of flowDepositary Shares, Series GSEC:0001415889-22-010947:0
Ideal exit: 25 Jul 2023 (T+270)
2,642 sharesCommon Shares, $.0011 par value per shareSEC:0001179110-22-002889:0
2,000 shares@ US$19.2250.0001% mcap12.6% of flowDepositary Shares, Series GSEC:0001179110-22-002773:0
Ideal exit: 24 Jan 2023 (T+270)
2,000 shares@ US$25.000.0001% mcap14.9% of flowDepositary Shares, Series ESEC:0001179110-21-009038:0
2,000 shares@ US$25.0012.2% of flowDepositary Shares, Series ESEC:0001179110-21-009038
775 shares0Common StockSEC:0001127602-21-021343:0
775 shares0Common StockSEC:0001127602-21-021343
4,000 shares@ US$25.242823.5% of flowDepositary Shares, Series ESEC:0001179110-21-006739
4,000 shares@ US$25.24280.0003% mcap28.8% of flowDepositary Shares, Series ESEC:0001179110-21-006739:0
360 shares@ US$274.170.0003% mcap50.0% of flowCommon StockSEC:0001127602-21-019402:0
360 shares@ US$274.1750.0% of flowCommon StockSEC:0001127602-21-019402
3,143 sharesCommon Shares, $.0011 par value per shareSEC:0001179110-21-005110:0
3,143 sharesCommon Shares, $.0011 par value per shareSEC:0001179110-21-005110
19 of 19 declarations
About Posner Brian S
Brian S. Posner is a Board Member at Arch Capital Group Ltd. and Biogen Inc. In this role, he contributes to the governance and strategy of the companies. Brian is recognized for his expertise in management and business development, enabling him to provide strategic advice to discussions within the boards. His varied experience in the industry allows him to provide valuable perspectives to support growth and innovation.
