 Alliancebernstein L.P. grew its position in AAON, Inc. NASDAQ:AAON by 1.3 during the first quarter, according to its most recent filing with the Securities and Exchange Commission. The institutional investor owned 67,763 shares of the construction companys stock after purchasing an additional 900 shares during the quarter. Alliancebernstein L.P. owned approximately 0.13 of AAON worth ... 