SCHEDULE 13G

Amendment No. 0
MAGNACHIP SEMICONDUCTOR CORP
Common Stock
Cusip #55933J203

Cusip #55933J203
Item 1:                 Reporting Person - FMR LLC
Item 4:                 Delaware
Item 5:                 0
Item 6:                 0
Item 7:                 4,107,094
Item 8:                 0
Item 9:                 4,107,094
Item 11:                11.753%
Item 12:                HC

Cusip #55933J203
Item 1:                 Reporting Person - Edward C. Johnson 3d
Item 4:                 United States of America
Item 5:                 0
Item 6:                 0
Item 7:                 4,107,094
Item 8:                 0
Item 9:                 4,107,094
Item 11:                11.753%
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:

MAGNACHIP SEMICONDUCTOR CORP

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

C/O MAGNACHIP SEMICONDUCTOR S.A.
74, RUE DE MERL
Luxembourg, Luxembourg NF L 2146
Luxembourg

Item 2(a).               Name of Person Filing:

FMR LLC

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

245 Summer Street, Boston, Massachusetts 02210

Item 2(c).               Citizenship:

Not applicable

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

Common Stock

Item 2(e).               CUSIP Number:

55933J203

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:       4,107,094

(b)    Percent of Class:        11.753%

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

(i)    sole power to vote or to direct the vote:         0

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

(iii)    sole power to dispose or to direct the 
disposition of:         4,107,094

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

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

Not applicable.

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

Various persons have the right to receive or the power to 
direct the receipt of dividends from, or the proceeds from the sale of, the 
Common Stock of MAGNACHIP SEMICONDUCTOR CORP. No one person's interest in 
the Common Stock of MAGNACHIP SEMICONDUCTOR CORP is more than five percent 
of the total outstanding Common Stock.

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.

By signing below I certify that, to the best of my knowledge and belief, 
the securities referred to above were acquired in the ordinary course of 
business and were not acquired for the purpose of and do not have the 
effect of changing or influencing the control of the issuer of such 
securities and were not acquired in connection with or as a participant in 
any transaction having such purpose or effect.

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.

April 9, 2014
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"), 245 Summer Street, 
Boston, Massachusetts 02210, 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 4,087,020 shares or 11.695% of the 
Common Stock outstanding of MAGNACHIP SEMICONDUCTOR CORP ("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.

Edward C. Johnson 3d and FMR LLC, through its control of 
Fidelity, and the funds each has sole power to dispose of the 4,087,020 
shares owned by the Funds.

Fidelity SelectCo, LLC ("SelectCo"), 1225 17th Street, 
Suite 1100, Denver, Colorado 80202, 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 8,400 shares or 0.024% of 
the Common Stock outstanding of MAGNACHIP SEMICONDUCTOR CORP ("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 "SelectCo Funds").

Edward C. Johnson 3d and FMR LLC, through its control of 
SelectCo, and the SelectCo Funds each has sole power to dispose of the 
8,400 owned by the SelectCo 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 11,674 shares or 0.033% of 
the outstanding Common Stock of the MAGNACHIP SEMICONDUCTOR CORP 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 
11,674 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 April 9, 2014, 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 MAGNACHIP 
SEMICONDUCTOR CORP at March 31, 2014.

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

Document-Separator. This page separates the filing documents of two 
notifications.

Page   of  

Exhibit A