AMSTERDAM--(BUSINESS WIRE)--Interxion Holding NV (NYSE:INXN), a leading European provider of cloud and carrier-neutral colocation data centre services, announced its results today for the three months ended 31 March 2015. Financial Highlights Revenue increased by 15% to €92.5 million (1Q 2014: €80.6 million). Adjusted EBITDA increased by 18% to €40.6 million (1Q 2014: €34.5 million). Adjusted EBITDA margin increased to 43.9% (1Q 2014: 42.9%). M&A transaction costs were €6.9 million before t