SEC FORM 3

SEC Form 3

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
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

FMR LLC

(Last)

(First)

(Middle)

245 SUMMER STREET

(Street)

BOSTON

02210

(City)

(State)

(Zip)

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 ]

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 of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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⁾

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: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
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

Explanation of Responses:

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.

	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
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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