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David Gansberg

CIK 1769539 · President, Arch Capital Group · last filed 2026-03-12

David Gansberg is a President, Arch Capital Group who has filed 36 SEC Form 4 insider transactions across 1 company since 2019. The most recent filing, for ACGL, was dated Jul 20, 2026. Across all open-market trades the lifetime net is −$2.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $6.9M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$6.85M

Companies

1

Total Filings

36

Lifetime Open-Market Net

-$2.19M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
ACGLO President, Arch Capital Group 351,466 $19.50 $6.85M -$2.19M 30 2026-03-12

Recent Filings

36 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-07-20 ACGL Notice (144) −76,325 -$7.63M EDGAR
2026-07-02 ACGL Notice (144) −79,273 -$8.05M EDGAR
2026-06-26 ACGL Notice (144) −33,096 -$3.22M EDGAR
2026-03-12 ACGLO Mixed +4,863 -$365.7K EDGAR
2026-03-10 ACGL Notice (144) −5,907 -$569.3K EDGAR
2026-03-05 ACGLO Mixed −5,676 -$1.23M EDGAR
2026-03-02 ACGLO Tax (F) −553 -$55.4K EDGAR
2026-02-26 ACGLO Mixed +28,037 -$50.5K EDGAR
2025-11-20 ACGLO Tax (F) −9,494 -$865.6K EDGAR
2025-03-06 ACGLO Mixed −6,389 -$1.27M EDGAR
Showing 1–10 of 36
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.