Grupo Petrotemex buyback their bonds

San Pedro Garza Garcia, Nuevo Leon, Mexico, July 13, 2012 – Alpek, SAB de CV (“ALPEK”) announced today that its subsidiary Grupo Petrotemex, SA de CV (“Petrotemex”) has launched an offer to purchase for cash (the “Offer”) any and all of its outstanding 9.5% Senior Notes (the “Bonds”) issued in 2009 and maturing in 2014. Such Bonds amount to US$ 275 million. Notes which do not adhere to the Offer will remain outstanding.