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Form SC 13G/A EXA CORP Filed by: COLUMBIA WANGER ASSET MANAGEMENT LLC Apr 10, 2015 09:31AM
Form SC 13G/A EXA CORP Filed by: COLUMBIA WANGER ASSET MANAGEMENT LLC Feb 11, 2015 10:40AM
Form SC 13G/A EXA CORP Filed by: COLUMBIA WANGER ASSET MANAGEMENT LLC Dec 8, 2014 10:54AM