GT Advanced Technologies Inc. Watch

from 8-K 76 pages GT Advanced Technologies, Inc. and U.S. Bank National Association as Trustee Second Supplemental Indenture Dated as of December 10, 2013 to Indenture Dated as of September 28, 2012 3.00% Convertible Senior Notes Due 2020

from 8-K 76 pages GT Advanced Technologies, Inc. and U.S. Bank National Association as Trustee First Supplemental Indenture Dated as of September 28, 2012 to Indenture Dated as of September 28, 2012 3.00% Convertible Senior Notes Due 2017

from 8-K 66 pages GT Advanced Technologies Inc. as Issuer and U.S. Bank National Association, as Trustee Indenture Dated as of September 28, 2012

from S-3ASR 60 pages GT Advanced Technologies Inc., as Issuer and U.S. Bank National Association, as Trustee Indenture Dated as Of

from S-1/A 1 page GT Number Shares Common Stock Common Stock This Certificate Is Transferable in Jersey City, Nj, New York, Ny and Pittsburgh, Pa See Reverse for Certain Definitions Cusip 3623e0 20 9 This Certifies That: Is the Owner Of: Fully Paid and Nonassessable Shares of the Par Value of $0.01 Each of the Common Stock of GT Solar International, Inc. Hereinafter Called the “Corporation”, Transferable on the Books of the Corporation by the Holder Hereof in Person, or by His Authorized Attorney, Upon the Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Until Countersigned and Registered by the Transfer Agent and Registrar. Witness the Facsimile Seal of the Corporation and the Facsimile Signatures of Its Duly Authorized Officers. Dated: GT Secretary President and Chief Executive Officer Seal 2006 GT Solar International, Inc. Delaware Corporate Countersigned and Registered: Mellon Investor Services LLC Transfer Agent and Registrar By: Authorized Signature ® Incorporated Under the Laws of the State of Delaware

from S-1/A 13 pages Amended and Restated GT Solar International, Inc. Employee Stockholders Agreement

from S-1 26 pages GT Equipment Technologies, Inc. Senior Secured Exchangeable Promissory Note

from S-1 18 pages Glow Merger Corporation Senior Secured Promissory Note