SHORT HILLS, N.J.--(BUSINESS WIRE)--Dun & Bradstreet (NYSE:DNB), the global leader in commercial information growing the most valuable relationships in business through data, today reported results for the first quarter ended March 31, 2015. "I’m pleased with the progress we are making as we execute our strategy and I feel good about performance in the first quarter. Operating income and EPS came in as expected reflecting the impact of the strategic investments made in the second half of 20