Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  FMR LLC
 2. Date of Event Requiring Statement (Month/Day/Year)
04/04/2014		 3. Issuer Name and Ticker or Trading Symbol
GT Advanced Technologies Inc. [GTAT]
(Last)
(First)
(Middle)
245 SUMMER STREET		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
Edward C. Johnson 3d
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

BOSTON, MA 02210		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 1,542,777 (1)
I
By Crosby Advisors LLC (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
GT ADVANCED TECH CV 3% 10/1/17 01/01/2013 09/28/2017 Common Stock 7,783 (1) $ 7.709 I By FIMM, LLC

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
FMR LLC
245 SUMMER STREET
BOSTON, MA 02210		     X   Edward C. Johnson 3d

Signatures

Scott C. Goebel, Duly authorized under Powers of Attorney effective as of June 1, 2008, by and on behalf of FMR LLC and its direct and indirect subsidiaries, and by and on behalf of Edward C. Johnson 3d 04/09/2014
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Table I, Column 2 and Table II, Column 3 does not include shares beneficially owned by Fidelity Management & Research Company and Pyramis Global Advisors Trust Company as a result of acting as investment adviser to various investment companies and accounts as disclosed in Remark 1 below.
(2) Crosby Advisors LLC, 11 Keewaydin Drive, Suite 200, Salem, New Hampshire, 03079, a wholly-owned subsidiary of Crosby Company of New Hampshire LLC ("CCNH"), is the beneficial owner of 1,542,777 shares of the outstanding Common Stock of GT Advanced Technologies Inc. as a result of providing investment advisory services to individuals, trusts and limited liability entities. Members of the family of Edward C. Johnson 3d, Chairman of FMR LLC, directly or indirectly, own CCNH.
 
Remarks:
In addition to the securities shown in Table I and Table II, Fidelity Management & Research Company and Pyramis Global Advisors Trust Company, each a direct or indirect wholly-owned subsidiary of FMR LLC, are the beneficial owners of 15,587,065 shares, or 11.0667%, of the Common Stock of GT ADVANCED TECHNOLOGIES INC. as a result of acting as investment adviser to various investment companies registered under the Investment Company Act of 1940, institutional accounts and non-U.S. mutual funds. FMR LLC and Edward C. Johnson 3d have no pecuniary interest in the 15,587,065 shares of Common Stock.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.