Arch Capital Group Ownership & Insider Activity

Arch Capital Group (ACGL) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 1.8% of shares outstanding. Institutional investors hold 75.3%.

Shares Outstanding

341.000M

Shares Float

290.094M

Insider Shares Owned

6.270M

Insider % Owned

1.8%

Institutional Shares Held

256.934M

Institutional % Held

75.3%

Ownership Breakdown

Net Insider Activity by Month

Arch Capital Group Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Aug 18, 2026	Francois Morin	CFO AND TREASURER	SELL-OPTIONS	—	$63.20	$795K
Jun 3, 2026	Brian S Posner	DIRECTOR	SELL	3.000K	$19.66	$59K
May 11, 2026	Brian S Posner	DIRECTOR	SELL	2.000K	$17.14	$34K
Apr 30, 2026	Daniel Joseph Houston	DIRECTOR	BUY	5.300K	$94.08	$499K

Date	Member	Party	Chamber	Action	Amount
Mar 27, 2026	Alan Armstrong	R	Senate	Purchase	$1,001 - $15,000
May 12, 2025	Jefferson Shreve	R	House	Sale	$15,001 - $50,000
Feb 25, 2025	Robert Bresnahan	R	House	Sale	$1,001 - $15,000
Feb 24, 2025	Jefferson Shreve	R	House	Purchase	$15,001 - $50,000