SCHEDULE 13G

Amendment No. 10 
Amkor Technology, Inc. 
Common Stock 
Cusip #031652100 

Cusip #031652100 
Item 1: Reporting Person - FMR LLC
Item 4: Delaware
Item 5: 4,900 
Item 6: 0 
Item 7: 8,584,364 
Item 8: 0 
Item 9: 8,584,364 
Item 11:        4.658% 
Item 12:            HC

Cusip #031652100  
Item 1: Reporting Person - Edward C. Johnson 3d 
Item 4: United States of America
Item 5: 0 
Item 6: 0 
Item 7: 8,584,364 
Item 8: 0 
Item 9: 8,584,364 
Item 11:        4.658% 
Item 12:        IN 

SCHEDULE 13G - TO BE INCLUDED IN 
STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)

Item 1(a).      Name of Issuer: 

Amkor Technology, Inc. 

Item 1(b).      Name of Issuer's Principal Executive Offices:

1900 South Price Road  
Chandler, AZ  85248

Item 2(a).      Name of Person Filing: 

FMR LLC

Item 2(b).      Address or Principal Business Office or, if None, 
Residence:

82 Devonshire Street, Boston, 
Massachusetts  02109

Item 2(c).      Citizenship:

Not applicable

Item 2(d).      Title of Class of Securities:

Common Stock 

Item 2(e).      CUSIP Number:  

031652100 

Item 3. This statement is filed pursuant to Rule 13d-1(b) or 13d-2(b) 
and the person filing, FMR LLC, is a parent holding company 
in accordance with Section 240.13d-1(b)(ii)(G).  (Note:  See 
Item 7).

Item 4. Ownership

(a)     Amount Beneficially Owned:      8,584,364 

(b)     Percent of Class:       4.658% 

(c)     Number of shares as to which such 
person has:  

(i)     sole power to vote or to direct 
the vote:       4,900 

(ii)    shared power to vote or to 
direct the vote:        0 

(iii)   sole power to dispose or to 
direct the disposition of:      8,584,364 

(iv)    shared power to dispose or to 
direct the disposition of:      0 

Item 5. Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the 
date hereof, the reporting person has ceased to be the 
beneficial owner of more than five percent of the class of 
securities, check the following (X).

Item 6. Ownership of More than Five Percent on Behalf of Another 
Person.

Not applicable

Item 7. Identification and Classification of the Subsidiary Which 
Acquired the Security Being Reported on By the Parent 
Holding Company.

See attached Exhibit A. 

Item 8. Identification and Classification of Members of 
the Group.

Not applicable.  See attached Exhibit A. 

Item 9. Notice of Dissolution of Group.

Not applicable.

Item 10.        Certification.  

Inasmuch as the reporting persons are no longer the beneficial 
owners of more than five percent of the number of shares 
outstanding, the reporting persons have no further reporting 
obligation under Section 13(d) of the Securities and Exchange 
Commission thereunder, and the reporting persons have no 
obligation to amend this Statement if any material change 
occurs in the facts set forth herein.     

Signature

After reasonable inquiry and to the best of my knowledge and 
belief, I certify that the information set forth in this statement 
is true, complete and correct. 

February 13, 2012                       
Date

/s/ Scott C. Goebel                    
Signature

Scott C. Goebel                         
Duly authorized under Power of Attorney
effective as of June 1, 2008 by and on behalf of FMR LLC 
and its direct and indirect  subsidiaries

SCHEDULE 13G - TO BE INCLUDED IN 
STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)

Pursuant to the instructions in Item 7 of Schedule 13G, 
Fidelity Management & Research Company ("Fidelity"), 82 
Devonshire Street, Boston, Massachusetts 02109, a wholly-
owned subsidiary of FMR LLC and an investment adviser 
registered under Section 203 of the Investment Advisers Act 
of 1940, is the beneficial owner of 8,575,264 shares or 4.653% 
of the Common Stock outstanding of Amkor Technology, Inc.  
("the Company") as a result of acting as investment adviser to 
various investment companies registered under Section 8 of 
the Investment Company Act of 1940. The number of shares 
of Common Stock of Amkor Technology, Inc. owned by the 
investment companies at December 31, 2011 included 
3,141,015 shares of Common Stock resulting from the 
assumed conversion of $9,500,000 principal amount of 
AMKOR TECH INC CONV 6% 4/15/14 (330.6332 shares of 
Common Stock for each $1,000 principal amount of 
debenture).

Edward C. Johnson 3d and FMR LLC, through its 
control of Fidelity, and the funds each has sole power to 
dispose of the 8,575,264 shares owned by the Funds.

Members of the family of Edward C. Johnson 3d, 
Chairman of FMR LLC, are the predominant owners, directly 
or through trusts, of Series B voting common shares of FMR 
LLC, representing 49% of the voting power of FMR LLC.  
The Johnson family group and all other Series B shareholders 
have entered into a shareholders' voting agreement under 
which all Series B voting common shares will be voted in 
accordance with the majority vote of Series B voting common 
shares.  Accordingly, through their ownership of voting 
common shares and the execution of the shareholders' voting 
agreement, members of the Johnson family may be deemed, 
under the Investment Company Act of 1940, to form a 
controlling group with respect to FMR LLC.

Neither FMR LLC nor Edward C. Johnson 3d, 
Chairman of FMR LLC, has the sole power to vote or direct 
the voting of the shares owned directly by the Fidelity Funds, 
which power resides with the Funds' Boards of Trustees.  
Fidelity carries out the voting of the shares under written 
guidelines established by the Funds' Boards of Trustees.

Pyramis Global Advisors Trust Company ("PGATC"), 
900 Salem Street, Smithfield, Rhode Island, 02917, an indirect 
wholly-owned subsidiary of FMR LLC and a bank as defined 
in Section 3(a)(6) of the Securities Exchange Act of 1934, is 
the beneficial owner of 9,100 shares or 0.005% of the 
outstanding Common Stock of the Amkor Technology, Inc. as 
a result of its serving as investment manager of institutional 
accounts owning such shares.

Edward C. Johnson 3d and FMR LLC, through its 
control of Pyramis Global Advisors Trust Company, each has 
sole dispositive power over 9,100 shares and sole power to 
vote or to direct the voting of 0 shares of Common Stock 
owned by the institutional accounts managed by PGATC as 
reported above.

SCHEDULE 13G - TO BE INCLUDED IN 
STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)
RULE 13d-1(f)(1)  AGREEMENT

The undersigned persons, on February 13, 2012, agree 
and consent to the joint filing on their behalf of this Schedule 
13G in connection with their beneficial ownership of the 
Common Stock of Amkor Technology, Inc. at December 31, 
2011.

FMR LLC

By /s/ Scott C. Goebel                  
Scott C. Goebel
Duly authorized under Power of Attorney effective as 
of June 1, 2008, by and on behalf of FMR LLC and its direct 
and indirect subsidiaries

Edward C. Johnson 3d

By /s/ Scott C. Goebel                  
Scott C. Goebel
Duly authorized under Power of Attorney effective as 
of June 1, 2008, by and on behalf of Edward C. Johnson 3d

Fidelity Management & Research Company

By /s/ Scott C. Goebel                  
Scott C. Goebel
Senior V.P. and General Counsel