Markel has reported an improvement in its combined ratio to 102% for the last quarter.
Markel's London operations generated a 6% rise in gross written premiums to $165.9m (£101m) and for the first half by 12% to $365.6m (£224m).
Richie Whitt, who will become vice president and chief administrative officer of Markel International on 1 September, said: "This represents impressive operating performance from our London business. It is the seventh consecutive quarter in which the combined ratio has fallen, and, at 102%, there is continued progress towards our goal of underwriting profitability.
"This progress was recently recognized by AM Best's upgrade of Markel International Insurance Company to "A-" (excellent). The importance of the London operations was recently shown by Markel Corporation's $45m capital contribution to Markel International Insurance Company."
Gerry Albanese, who takes up the position of president and chief operating officer of Markel International on 1 September, added: "We are also excited by the possibility of marketing our products in continental Europe within the next 12 months. We are very encouraged by both the performance that has been achieved and the opportunities we see."
