Posner Brian S 4

What Happened
Brian S. Posner, a director of Arch Capital Group Ltd. (ACGL), sold 3,000 depositary shares in an open-market transaction on March 11, 2026. The weighted-average sale price was $17.11 per depositary share, for total proceeds of approximately $51,345. This was a sale (not a purchase); sales by insiders can be routine and do not by themselves indicate a change in sentiment.

Key Details

• Transaction date: 2026-03-11; Form 4 filed: 2026-03-12 (appears timely). Accession: 0001372455-26-000002.
• Price: weighted average $17.11; filing notes the shares were sold in multiple transactions at prices ranging $17.1149–$17.1150. (Full breakdown available on request per the filing.)
• Quantity sold: 3,000 depositary shares; proceeds ≈ $51,345.
• Shares owned after transaction: not disclosed in the provided filing summary.
• Footnotes: filing explains these are depositary shares representing fractional interests in Arch Capital preferred shares (each depositary share = 1/1,000th interest in a Series F or Series G non‑cumulative preferred share per the footnotes).
• No 10b5‑1 plan, tax‑withholding sale, or late‑filing flag was noted in the provided details.

Context
Depositary shares are fractional interests in preferred stock; at 1/1,000th per depositary share, the 3,000 depositary shares sold equal the economic interest of 3 full preferred shares. For retail investors, note that insider sales are common (for diversification, liquidity, taxes, etc.) and should be weighed alongside other signals such as timing, other insider trades, and company fundamentals.