Company · Ownership research

ARCH CAPITAL GROUP LTD. ACGL

CIK 0000947484

Form 4 transactions dated Sep 1, 2023 to Sep 25, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 49 rows; the complete set is available through the API.

Insider filings on file run through 2026-08-20.

Insider purchases & sales

Purchased: $515.99K
Sold: $93.89M

Sep 1, 2023 – Aug 20, 2026
Available records · partial months are marked ·

20268 of 8 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-08-18	Morin Francois CFO and Treasurer	Sale	$1.09M 11,010 shares sold	5.62% sold Direct holding	▾
2026-06-03	Posner Brian S Director	Sale	$58.98K 3,000 shares sold	100.00% sold Direct holding	▾
2026-05-11	Posner Brian S Director	Sale	$34.28K 2,000 shares sold	100.00% sold Direct holding	▾
2026-04-30	Houston Daniel Joseph Director	Purchase	$498.65K 5,300 shares bought	114.84% added Direct holding	▾
2026-03-11	Posner Brian S Director	Sale	$51.34K 3,000 shares sold	60.00% sold Direct holding	▾
2026-03-10	Gansberg David President, Arch Capital Group	Sale	$569.27K 5,907 shares sold	1.72% sold Direct holding	▾
2026-03-10	Papadopoulo Nicolas CEO · Director	Sale	$2.11M 21,930 shares sold	2.45% sold Direct holding	▾
2026-02-11	Rajeh Maamoun President, Arch Capital Group	Sale	$4.56M 47,430 shares sold	9.86% sold Direct holding	▾

Showing 8 / 8 record groups in 2026. The complete set is available through the API.

ARCH CAPITAL GROUP LTD. · ACGL

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 8 of 8 purchase / sale groups and 30 of 49 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"ACGL","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.