Posner Brian S

Arch Capital Group Ltd · Director

Posner Brian S is listed in public filings as director. This Posner Brian S insider trading page organizes Form 4 disclosures, reported purchases and sales, transaction dates, share amounts, related issuers, and historical insider activity so readers can review the person's public trading record in one place. Companies and tickers connected to this insider trading profile include Arch Capital Group Ltd (ACGL), and Dyne Therapeutics, Inc. (DYN). Investors use Posner Brian S's insider trading disclosures to study buying and selling patterns, position changes, company-specific activity, and the source evidence behind each reported transaction.

Latest Actions

CompanyHolding ValueLast TransactionAmountTransaction PriceCurrent Price
Arch Capital Group LtdACGL$03k sharesSellJun 3, 2026$59.0K3k shares$19.66--
Dyne Therapeutics, Inc.DYN$393k22.5k sharesBuyJun 3, 2026$43.7K2.5k shares$17.48--

Insider Trades History

CompanyHolding ValueLast TransactionAmountTransaction PriceCurrent Price
Dyne Therapeutics, Inc.DYN$364k20k sharesBuyMay 26, 2026$36.4K2k shares$18.21--
Dyne Therapeutics, Inc.DYN$308k18k sharesBuyMay 20, 2026$42.8K2.5k shares$17.12--
Arch Capital Group LtdACGL$02k sharesSellMay 11, 2026$34.3K2k shares$17.14--
Arch Capital Group LtdACGL--122.2k sharesGrant / ExerciseMay 5, 2026Disclosure amount unavailable2.1k shares----
Dyne Therapeutics, Inc.DYN$265k15.5k sharesBuyMar 30, 2026$34.2K2k shares$17.08--
Arch Capital Group LtdACGL$34k2k sharesSellMar 11, 2026$51.3K3k shares$17.12--
Dyne Therapeutics, Inc.DYN$261k13.5k sharesBuyMar 11, 2026$38.7K2k shares$19.35--
Dyne Therapeutics, Inc.DYN$173k11.5k sharesBuyMar 6, 2026$45.2K3k shares$15.06--
Dyne Therapeutics, Inc.DYN$875k70k sharesGrant / ExerciseOct 1, 2025$875.0K70k shares$12.50--
Arch Capital Group LtdACGL$87k5k sharesBuyAug 1, 2025$17.3K1k shares$17.34--
Arch Capital Group LtdACGL--120.1k sharesGrant / ExerciseMay 7, 2025Disclosure amount unavailable1.6k shares----