Earnings roundup: Commerzbank, athenahealth

Among the earnings stories for Wednesday, May 7, from AP Financial News:

FRANKFURT, Germany (AP) _ Commerzbank AG, Germany's second-biggest bank, said Wednesday that its first-quarter profit slid 54 percent because of more write-downs related to the U.S. subprime mortgage crisis and its CEO said it may have trouble beating last year's annual results.

WATERTOWN, Mass. (AP) _ Shares of medical billing software maker athenahealth Inc. surged more than 10 percent Wednesday after the company said it swung to a better-than-expected profit in the first quarter.

NEW YORK (AP) _ Shares of Titanium Metals Corp. jumped Wednesday, a day after the company reported first-quarter profit fell 46 percent but still met analyst expectations.

CLARENCE, N.Y. (AP) _ Medical components maker Greatbatch Corp. said late Tuesday that it swung to a loss in the first quarter _ sending shares to a new low _ as acquisition-related charges and increased manufacturing costs weighed on the company's margins.

NEW YORK (AP) _ Shares of Pioneer Natural Resources Co. jumped Wednesday, after the oil and gas producer said its first-quarter earnings more than quadrupled on expanding production and sales of oil and gas.

ALBUQUERQUE, N.M. (AP) _ Shares of PNM Resources Inc. tumbled Wednesday, after the utility said it swung to a first-quarter loss on numerous speculative trading charges as well as facility outages.