The underwriting companies of Arch Insurance Group, a division of Arch Capital Group Ltd., provide an array of P/C and specialty insurance products in the U.S., Canada, and abroad. Our offerings, marketed principally through retail and wholesale brokers, include: property, energy (offshore, onshore, casualty), aerospace, marine(Europe), Builders Risk (construction all risk/erection all risk), casualty (primary, and excess liability), national accounts casualty (GL, PL, WC and Auto), construction, surety, D&O liability, medical professional liability, professional and environmental liability, accident and health, alternative markets, and program business.