 Alliancebernstein L.P. boosted its position in shares of Mistras Group Inc NYSE:MG by 24.8 during the 1st quarter, according to its most recent Form 13F filing with the Securities and Exchange Commission. The institutional investor owned 19,640 shares of the technology companys stock after acquiring an additional 3,900 shares during the quarter. Alliancebernstein L.P. owned ... 