UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

SCHEDULE 13G/A
(Amendment No. 1)
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO
RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)

MagnaChip Semiconductor Corporation
(Name of Issuer)
Common Stock, par value $0.01 per share
(Title of Class of Securities)
55933J203
(CUSIP Number)
December 31, 2012
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
¨ Rule 13d-1(b)
¨ Rule 13d-1(c)
x Rule 13d-1(d)

 

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	Page 2 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Investments, L.P.	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
745,837	 	
 	  	8	  	SHARED VOTING POWER
 
0	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
745,837	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
745,837	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
2.1%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
PN	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	3 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue International Master, L.P.	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Cayman Islands	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
2,237,100	 	
 	  	8	  	SHARED VOTING POWER
 
0	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
2,237,100	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
2,237,100	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
6.3%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
PN	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	4 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue International, Ltd.	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Cayman Islands	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
2,237,100	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
2,237,100	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
2,237,100	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
6.3%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
CO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	5 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue International Master GenPar, Ltd.	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Cayman Islands	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
2,237,100	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
2,237,100	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
2,237,100	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
6.3%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
CO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	6 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Partners, LLC	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
New York	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
2,982,937	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
2,982,937	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
2,982,937	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
8.3%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
OO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	7 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue-CDP Global Opportunities Fund, L.P.	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Cayman Islands	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
762,366	 	
 	  	8	  	SHARED VOTING POWER
 
0	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
762,366	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
762,366	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
2.1%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
PN	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	8 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Global Opportunities Fund GenPar, LLC	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
762,366	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
762,366	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
762,366	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
2.1%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
OO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 
 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	9 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Special Situations Fund IV, L.P.	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
4,434,684	 	
 	  	8	  	SHARED VOTING POWER
 
0	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
4,434,684	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
4,434,684	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
12.4%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
PN	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	10 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Capital Partners IV, LLC	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
4,434,684	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
4,434,684	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
4,434,684	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
12.4%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
OO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	11 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
GL Partners IV, LLC	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
4,434,684	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
4,434,684	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
4,434,684	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
12.4%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
OO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	12 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Special Situations Fund V, L.P.	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
5,609,552	 	
 	  	8	  	SHARED VOTING POWER
 
0	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
5,609,552	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
5,609,552	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
15.6%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
PN	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	13 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Capital Partners V, LLC	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
5,609,552	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
5,609,552	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
5,609,552	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
15.6%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
OO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	14 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
GL Partners V, LLC	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
5,609,552	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
5,609,552	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
5,609,552	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
15.6%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
OO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 
 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	15 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Capital Management II, L.P.	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
13,789,539	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
13,789,539	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
13,789,539	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
38.1%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
IA	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	16 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Avenue Capital Management II GenPar, LLC	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
13,789,539	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
13,789,539	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
13,789,539	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
38.1%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
OO	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

 	 	 	 	 	
CUSIP No. 55933J203	 	13G/A	 	17 of 23	

  1 	 	NAME OF REPORTING PERSONS
 
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
 
Marc Lasry	 	
  2	 	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 
(a)  ¨        
 
(b)  ¨	 	
  3	 	SEC USE ONLY
 	 	
  4	 	SOURCE OF FUNDS*
 
SC; OO	 	
  5	 	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
 
¨	 	
  6	 	CITIZENSHIP OR PLACE OF ORGANIZATION
 
United States of America	 	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH	  	7 	  	SOLE VOTING POWER
 
0	 	
 	  	8	  	SHARED VOTING POWER
 
13,789,539	 	 	 	 	
 	  	9	  	SOLE DISPOSITIVE POWER
 
0	 	 	 	 	 	 	 	
 	  	10	  	SHARED DISPOSITIVE POWER
 
13,789,539	 	 	 	 	 	 	 	 	 	
  11	 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
13,789,539	 	 	 	 	 	 	 	 	 	
  12	 	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 
¨	 	 	 	 	 	 	 	 	 	
  13	 	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
38.1%	 	 	 	 	 	 	 	 	 	
  14	 	TYPE OF REPORTING PERSON*
 
IN	 	 	 	 	 	 	 	 	 	
 
*	SEE INSTRUCTIONS BEFORE FILLING OUT	

SCHEDULE 13G/A
This Amendment No. 1 (this “Amendment”) to the Schedule 13G filed on February 9, 2012 (the “Schedule 13G”) is being filed on behalf of Avenue Investments, L.P. (“Avenue Investments”), Avenue International Master, L.P. (“Avenue International Master”), Avenue International, Ltd. (“Avenue International”), Avenue International Master GenPar, Ltd. (“Avenue International GenPar”), Avenue Partners, LLC (“Avenue Partners”), Avenue-CDP Global Opportunities Fund, L.P. (“Avenue-CDP”), Avenue Global Opportunities Fund GenPar, LLC (“Avenue Global GenPar”), Avenue Special Situations Fund IV, L.P. (“Avenue Fund IV”), Avenue Capital Partners IV, LLC (“Avenue Capital IV”), GL Partners IV, LLC (“GL IV”), Avenue Special Situations Fund V, L.P. (“Avenue Fund V”), Avenue Capital Partners V, LLC (“Avenue Capital V”), GL Partners V, LLC (“GL V”), Avenue Capital Management II, L.P. (“Avenue Capital Management”), Avenue Capital Management II GenPar, LLC (“Avenue Capital Management GenPar”) and Marc Lasry relating to shares of Common Stock, par value $0.01 per share (the “Common Stock”), of MagnaChip Semiconductor Corporation, a Delaware corporation (the “Issuer”).
Item 4 is amended and restated in its entirety to read as follows.
 
Item 4	Ownership.	
(a)-(b) As of December 31, 2012, the following is the beneficial ownership and percentage of the Issuer’s Common Stock outstanding for each of the Reporting Persons:

Name of
Reporting
Person	  	Number of
Shares of
Common
Stock	 	  	Number of
Shares of
Common Stock
upon Exercise of
Warrants	 	  	Total Number
of Shares of
Common Stock	 	  	Percentage of Class	 	
Avenue Investments	  	 	722,264	  	  	 	23,573	  	  	 	745,837	  	  	 	2.1	% 	
Avenue International Master	  	 	2,166,652	  	  	 	70,448	  	  	 	2,237,100	  	  	 	6.3	% 	
Avenue International	  	 	2,166,652	  	  	 	70,448	  	  	 	2,237,100	  	  	 	6.3	% 	
Avenue International GenPar	  	 	2,166,652	  	  	 	70,448	  	  	 	2,237,100	  	  	 	6.3	% 	
Avenue Partners	  	 	2,888,916	  	  	 	94,021	  	  	 	2,982,937	  	  	 	8.3	% 	
Avenue-CDP	  	 	732,051	  	  	 	30,315	  	  	 	762,366	  	  	 	2.1	% 	
Avenue Global GenPar	  	 	732,051	  	  	 	30,315	  	  	 	762,366	  	  	 	2.1	% 	
Avenue Fund IV	  	 	4,275,774	  	  	 	158,910	  	  	 	4,434,684	  	  	 	12.4	% 	
Avenue Capital IV	  	 	4,275,774	  	  	 	158,910	  	  	 	4,434,684	  	  	 	12.4	% 	
GL IV	  	 	4,275,774	  	  	 	158,910	  	  	 	4,434,684	  	  	 	12.4	% 	
Avenue Fund V	  	 	5,336,837	  	  	 	272,715	  	  	 	5,609,552	  	  	 	15.6	% 	
Avenue Capital V	  	 	5,336,837	  	  	 	272,715	  	  	 	5,609,552	  	  	 	15.6	% 	
GL V	  	 	5,336,837	  	  	 	272,715	  	  	 	5,609,552	  	  	 	15.6	% 	
Avenue Capital Management	  	 	13,233,578	  	  	 	555,961	  	  	 	13,789,539	  	  	 	38.1	% 	
Avenue Capital Management GenPar	  	 	13,233,578	  	  	 	555,961	  	  	 	13,789,539	  	  	 	38.1	% 	
Marc Lasry	  	 	13,233,578	  	  	 	555,961	  	  	 	13,789,539	  	  	 	38.1	% 	
 
18 of 23

The approximate percentage of Common Stock reported as beneficially owned by each of the Reporting Persons is based upon the sum of (i) 35,635,357 shares of Common Stock outstanding as of December 31, 2012, as reported by the Issuer in its Form 8-K filed by the Issuer with the Securities Exchange Commission on January 30, 2013, and (ii) the number of shares of Common Stock held by the applicable Reporting Person upon the exercise or presently exercisable warrants.
(c) The Funds have the sole power to vote and dispose of the shares of Common Stock held by them reported in this Amendment. Avenue International, Avenue International GenPar, Avenue Partners, Avenue Global GenPar, Avenue Capital IV, GL IV, Avenue Capital V, GL V, Avenue Capital Management, Avenue Capital Management GenPar and Marc Lasry have the shared power to vote and dispose of the shares of Common Stock held by the Funds reported in this Amendment.
 
19 of 23

SIGNATURE
After reasonable inquiry and to the best of their knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.
Dated: February 1, 2013

AVENUE INVESTMENTS, L.P.	
 	 	
By:	 	Avenue Partners, LLC,	
 	 	its General Partner	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
AVENUE INTERNATIONAL MASTER, L.P.	
 	 	
By:	 	Avenue International Master	
 	 	GenPar, Ltd.	
 	 	its General Partner	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Director	
 	
AVENUE INTERNATIONAL, LTD.	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Director	
 	
AVENUE INTERNATIONAL MASTER GENPAR, LTD.	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Director	
 	
AVENUE PARTNERS, LLC	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 
20 of 23

 	 	 	
AVENUE - CDP GLOBAL OPPORTUNITIES FUND, L.P.	
 	 	
By:	 	Avenue Global Opportunities Fund	
 	 	GenPar, LLC	
 	 	its General Partner	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
AVENUE GLOBAL OPPORTUNITIES FUND GENPAR, LLC	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
AVENUE SPECIAL SITUATIONS FUND IV, L.P.	
 	 	
By:	 	Avenue Capital Partners IV, LLC,	
 	 	its General Partner	
 	 	
By:	 	GL Partners IV, LLC,	
 	 	its Managing Member	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
AVENUE CAPITAL PARTNERS IV, LLC	
 	 	
By:	 	GL Partners IV, LLC,	
 	 	its Managing Member	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 
21 of 23

 	 	 	
GL PARTNERS IV, LLC	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
AVENUE SPECIAL SITUATIONS FUND V, L.P.	
 	 	
By:	 	Avenue Capital Partners V, LLC,	
 	 	its General Partner	
 	 	
By:	 	GL Partners V, LLC,	
 	 	its Managing Member	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
AVENUE CAPITAL PARTNERS V, LLC	
 	 	
By:	 	GL Partners V, LLC,	
 	 	its Managing Member	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
GL PARTNERS V, LLC	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 
22 of 23

 	 	 	
AVENUE CAPITAL MANAGEMENT II, L.P.	
 	 	
By:	 	Avenue Capital Management II	
 	 	GenPar, LLC,	
 	 	its General Partner	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
AVENUE CAPITAL MANAGEMENT II GENPAR, LLC	
 	 	
By:	 	/s/ Eric Ross	
 	 	Name: Eric Ross	
 	 	Title: Attorney-in-Fact for Marc Lasry, Managing Member	
 	
MARC LASRY	
 	
/s/ Eric Ross, Attorney-in-Fact for Marc Lasry	
 
23 of 23