Arch Capital Group has registered that its net income available to common shareholders for the first quarter of 2012 was $157.8m, or $1.14 per share, against $19m, or $0.14 per share during the corresponding quarter of 2011.

During the same quarter the firm after-tax operating income available to common shareholders stood at $113.7m, or $0.82 per share compared to $7.6m, or $0.06 per share, for the 2011 first quarter.

As of end March 2012, the Company's book value per common share was $33.33, up 4.9% from $31.76 per share during the fourth quarter of 2011.

The after-tax operating income available to common shareholders represented a 10.4% annualized return on average common equity for the 2012 first quarter, versus to 0.7% during the same period a year ago.

The company sustained a loss of $23m during the first quarter of 2012, primarily due to natural catastrophe occurred in the US as well as a loss of $19.6m due to net of reinsurance and reinstatement premiums, for the January 2012 Costa Concordia marine event.

During the latest quarter period, its net foreign exchange losses were $20.7m compared to net foreign exchange losses for the 2011 first quarter of $36.9m.