Apax Europe VII-A SC 13D/A IGATE / Apax Europe VII-A ownership change

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Schedule 13D

(Rule 13d-101)

Under the Securities Exchange Act of 1934

(Amendment No. 4)

iGATE CORPORATION

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

451 69U 10 5

(CUSIP Number)

Devora Har-Tuv

c/o Viscaria Limited

Lemesou, 77

Elia House

P.C. 2121, Nicosia, Cyprus

+972 3777-4416

Copies to:

Joshua N. Korff, Esq.

Srinivas S. Kaushik, Esq.

601 Lexington Avenue

New York, New York 10022

(212) 446-4800

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

April 3, 2013

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.  ¨

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Exchange Act”) or otherwise subject to the liabilities of that section of the Exchange Act but shall be subject to all other provisions of the Exchange Act.

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Viscaria Limited
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION Cyprus
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 20,801,274*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 20,801,274*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 20,801,274*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 27.1%**
14	TYPE OF REPORTING PERSON (See Instructions) CO

* Beneficial ownership of common stock of the Issuer has been calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30. See Item 5 of the Schedule 13D for further information.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

2

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VII-A, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION England
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 4,945,658*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 4,945,658*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,945,658*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.4%**
14	TYPE OF REPORTING PERSON (See Instructions) PN

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

3

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VII-B, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION England
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 9,074,313*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 9,074,313*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9,074,313*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 11.8%**
14	TYPE OF REPORTING PERSON (See Instructions) PN

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

4

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VII-1, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION England
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 232,147*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 232,147*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 232,147*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.3%**
14	TYPE OF REPORTING PERSON (See Instructions) PN

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

5

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VII GP L.P. Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION Guernsey
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 14,252,118*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 14,252,118*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 14,252,118*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 18.6%**
14	TYPE OF REPORTING PERSON (See Instructions) OO

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

6

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VII GP Co. Limited
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION Guernsey
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 14,252,118*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 14,252,118*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 14,252,118*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 18.6%**
14	TYPE OF REPORTING PERSON (See Instructions) OO

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

7

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VI-1, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION England
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 6,615*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 6,615*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 6,615*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0%**
14	TYPE OF REPORTING PERSON (See Instructions) PN

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

8

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VI-A, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION England
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 5,476,136*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 5,476,136*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,476,136*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.1%**
14	TYPE OF REPORTING PERSON (See Instructions) PN

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

9

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VI GP L.P. Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION Guernsey
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 5,482,751*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 5,482,751*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,482,751*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.1%**
14	TYPE OF REPORTING PERSON (See Instructions) OO

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

10

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Europe VI GP Co. Limited
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION Guernsey
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 5,482,751*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 5,482,751*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,482,751*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.1%**
14	TYPE OF REPORTING PERSON (See Instructions) OO

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

11

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Partners Europe Managers Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION England
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 19,734,869*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 19,734,869*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 19,734,869*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 25.6%**
14	TYPE OF REPORTING PERSON (See Instructions) OO

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

12

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax Guernsey (Holdco) PCC Limited
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION Guernsey
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 19,734,869*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 19,734,869*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 19,734,869*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 25.6%**
14	TYPE OF REPORTING PERSON (See Instructions) OO

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

13

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax US VII, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
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 1,066,405*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 1,066,405*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,066,405*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.4%**
14	TYPE OF REPORTING PERSON (See Instructions) PN

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

14

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax US VII GP, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
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 1,066,405*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 1,066,405*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,066,405*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.4%**
14	TYPE OF REPORTING PERSON (See Instructions) PN

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

15

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) Apax US VII GP, Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
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 1,066,405*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 1,066,405*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,066,405*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.4%**
14	TYPE OF REPORTING PERSON (See Instructions) CO

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

16

CUSIP No. 451 69U 10 5

1	NAMES OF REPORTING PERSONS / I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only) John F. Megrue
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a)  ¨        (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(D) OR 2(E)    ¨ N/A
6	CITIZENSHIP OR PLACE OF ORGANIZATION United States
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 1,066,405*
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 1,066,405*
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,066,405*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)    ¨ N/A
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.4%**
14	TYPE OF REPORTING PERSON (See Instructions) IN

* Beneficial ownership of common stock of the Issuer (calculated based upon the as-converted voting power of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Viscaria Limited on February 1, 2011 and on May 9, 2011, assuming a conversion price of $20.30) is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such preferred stock as a result of the relationships described in the Schedule 13D. Neither the filing of the Schedule 13D nor any of its contents shall be deemed to constitute an admission by any of the reporting persons that it is the beneficial owner of any preferred or common stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.

** Based on 57,614,436 shares of common stock of the Issuer outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the19,147,469 shares of common stock of the Issuer issuable upon conversion (assuming a conversion price of $20.30) of the 8% Series B Convertible Participating Preferred Stock of the Issuer issued to Investor on February 1, 2011 and on May 9, 2011 pursuant to the purchase agreement described in Item 3 of the Schedule 13D.

17

Pursuant to Rule 13d-2 of the Securities Exchange Act of 1934, this Amendment No. 4 (“Amendment No. 4”) amends and supplements the Schedule 13D filed with the United States Securities and Exchange Commission (the “SEC”) on February 11, 2011 (the “Original 13D”), as amended and supplemented by Amendment No. 1 to the Original 13D filed with the SEC on May 19, 2011 (“Amendment No. 1”), Amendment No. 2 to the Original 13D filed with the SEC on December 11, 2011 (“Amendment No. 2”), and Amendment No. 3 to the Original 13D filed with the SEC on May 15, 2012 (“Amendment No. 3”, and together with the Original 13D, Amendment No. 1 and Amendment No. 2, the “Schedule 13D”) with respect to the Items and matters described below. The Schedule 13D was filed jointly on behalf of (i) Viscaria Limited, a private company limited by shares formed under the laws of Cyprus (“Investor”), (ii) Apax Europe VI-A, L.P. and Apax Europe VI-1, L.P. (collectively, the “Apax Europe VI Funds”), (iii) Apax Europe VII-A, L.P., Apax Europe VII-B, L.P. and Apax Europe VII-1, L.P. (collectively, the “Apax Europe VII Funds”), (iv) Apax US VII, L.P. (the “Apax US Fund”), (v) Apax Europe VI GP L.P. Inc. and Apax Europe VI GP Co. Limited (collectively, the “Apax Europe VI Funds GPs”), (vi) Apax Europe VII GP L.P. Inc. and Apax Europe VII GP Co. Limited (collectively, the “Apax Europe VII Funds GPs”), (vii) Apax US VII GP, L.P. and Apax US VII GP, Ltd. (collectively, the “Apax US Fund GPs”), (viii) Apax Partners Europe Managers Ltd, (ix) Apax Guernsey (Holdco) PCC Limited, and (x) John F. Megrue (the entities and persons inclauses (i) through(x), collectively the “Reporting Persons”). Capitalized terms used in this Amendment No. 4 but not otherwise defined herein have the meanings set forth in the Schedule 13D.

Item 3. Source and Amount of Funds or Other Consideration.

Item 3 of the Schedule 13D is supplemented as follows:

The total amount of funds used by Investor to purchase the shares of Common Stock from Mr. Murthy (as defined below) pursuant to the Murthy Share Transfer (as defined below) as described in this Amendment No. 4 to the Schedule 13D was USD $1,972,185.92, which was obtained from capital contributions of limited partners to the Apax Funds.

Item 4. Purpose of the Transaction.

Item 4 of the Schedule 13D is supplemented as follows:

On March 6, 2013, Investor and Phaneesh Murthy, the Chief Executive Officer of the Issuer (“Mr. Murthy”), entered into a Common Stock Purchase Agreement (the “Murthy Common Stock Purchase Agreement”), pursuant to which Mr. Murthy agreed to sell 104,459 shares of Common Stock owned by Mr. Murthy to Investor for a per share price of $18.88 (the “Murthy Share Transfer”). The Murthy Share Transfer was effected on March 6, 2013.

The foregoing summary description of the Murthy Common Stock Purchase Agreement and the transactions contemplated thereby does not purport to be complete and is subject to and qualified in its entirety by reference to the Murthy Common Stock Purchase Agreement, the terms of which are set forth inExhibit 13 hereto, and the terms of which are incorporated herein by reference.

18

Each of the Reporting Persons acquired the shares of Common Stock from Mr. Murthy pursuant to the Murthy Share Transfer for investment purposes. Consistent with such purposes, the Reporting Persons may engage in communications with, without limitation, management, directors and shareholders (including Reporting Persons) of the Issuer, and may make suggestions concerning the Issuer’s operations, prospects, business and financial strategies, strategic transactions, assets and liabilities, business and financing alternatives and such other matters as the Reporting Persons may deem relevant to their investment in the Series B Preferred Stock and Common Stock they own.

Each of the Reporting Persons expects to continuously review such person’s investment in the Issuer and, depending on various factors, including but not limited to, the price of shares of Common Stock, the terms and conditions of the transaction, prevailing market conditions and such other considerations as such Reporting Person deems relevant, may at any time or from time to time, and subject to any required regulatory approvals, lend funds, invest in debt or similar investments issued by the Issuer, acquire additional shares of Common Stock, preferred stock of the Issuer or other securities convertible into or exercisable or exchangeable for Common Stock from time to time on the open market, in privately-negotiated transactions, directly from the Issuer, or upon the exercise or conversion of securities convertible into or exercisable or exchangeable for Common Stock. Each Reporting Person, upon invitation by the Issuer, may participate in any investment or strategic transaction involving the Issuer.

Each Reporting Person also may, at any time, subject to compliance with applicable securities laws and regulatory requirements, dispose of or distribute some or all of its Series B Preferred Stock, Common Stock and/or such other securities or investments it owns or may subsequently acquire such securities depending on various factors, including but not limited to, the price of shares of Common Stock, the terms and conditions of the transaction and prevailing market conditions, as well as liquidity and diversification objectives.

Based on the transactions and relationships described herein, the Reporting Persons may be deemed to constitute a “group” for purposes of Section 13(d)(3) of the Exchange Act. The filing of the Schedule 13D shall not be construed as an admission that the Reporting Persons are a group, or have agreed to act as a group, and the existence of any such group is expressly disclaimed.

Item 5. Interest in Securities of the Issuer.

Clauses (a) and (b) of Item 5 of the Schedule 13D are amended and restated in their entirety as follows:

(a) and (b)

(i) Investor beneficially owns 20,801,274 shares of Common Stock, which represents 27.1% of the outstanding Common Stock (calculated based on 57,614,436 shares of Common Stock outstanding as of February 28, 2013 (as disclosed in the Form 10-K filed by the Issuer on March 18, 2013) plus the 19,147,469 shares of Common Stock issuable upon conversion (assuming a conversion price of $20.30) of the Series B Preferred Stock issued to Investor at the First Closing on February 1, 2011 and at the Second Closing on May 9, 2011 (the “Calculation Method”)), all of which shares are issuable upon the conversion of the Series B Preferred Stock held by Investor.

19

(ii) Apax Europe VII-A, L.P. may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 4,945,658 shares of Common Stock, which represents 6.4% of the outstanding Common Stock (calculated based on the Calculation Method);

(iii) Apax Europe VII-B, L.P. may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 9,074,313 shares of Common Stock, which represents 11.8% of the outstanding Common Stock (calculated based on the Calculation Method);

(iv) Apax Europe VII-1, L.P. may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 232,147 shares of Common Stock, which represents 0.3% of the outstanding Common Stock (calculated based on the Calculation Method);

(v) Apax Europe VII GP L.P. Inc. is the general partner of the Apax VII Funds and, as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 14,252,118 shares of Common Stock, which represents 18.6% of the outstanding Common Stock (calculated based on the Calculation Method);

(vi) Apax Europe VII GP Co. Limited is the general partner of Apax Europe VII GP L.P. Inc., and as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 14,252,118 shares of Common Stock, which represents 18.6% of the outstanding Common Stock (calculated based on the Calculation Method);

(vii) Apax Europe VI-A, L.P. may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 5,476,136 shares of Common Stock, which represents 7.1% of the outstanding Common Stock (calculated based on the Calculation Method);

(viii) Apax Europe VI-1, L.P. may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 6,615 shares of Common Stock, which represents 0.0% of the outstanding Common Stock (calculated based on the Calculation Method);

(ix) Apax Europe VI GP L.P. Inc. is the general partner of the Apax VI Funds and, as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 5,482,751 shares of Common Stock, which represents 7.1% of the outstanding Common Stock (calculated based on the Calculation Method);

(x) Apax Europe VI GP Co. Limited is the general partner of Apax Europe VI GP L.P. Inc., and as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 5,482,751 shares of Common Stock, which represents 7.1% of the outstanding Common Stock (calculated based on the Calculation Method);

(xi) Apax Partners Europe Managers Ltd has been appointed by Apax Europe VI GP L.P. Inc. and Apax Europe VII GP L.P. Inc. as discretionary investment manager of the investments of the Apax Europe VI Funds and the Apax Europe VII Funds, respectively, and as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 19,734,869 shares of Common Stock, which represents 25.6% of the outstanding Common Stock (calculated based on the Calculation Method);

20

(xii) Apax Guernsey (Holdco) PCC Limited is the sole equity holder of each of Apax Europe VI GP Co. Limited and Apax Europe VII GP Co. Limited, and as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 19,734,869 shares of Common Stock, which represents 25.6% of the outstanding Common Stock (calculated based on the Calculation Method);

(xiii) Apax US Fund may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 1,066,405 shares of Common Stock, which represents 1.4% of the outstanding Common Stock (calculated based on the Calculation Method);

(xiv) Apax US VII GP, L.P. is the general partner of the Apax US Fund and, as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 1,066,405 shares of Common Stock, which represents 1.4% of the outstanding Common Stock (calculated based on the Calculation Method);

(xv) Apax US VII GP, Ltd. is the general partner of Apax US VII GP, L.P., and as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 1,066,405 shares of Common Stock, which represents 1.4% of the outstanding Common Stock (calculated based on the Calculation Method); and

(xvi) John F. Megrue is the sole equity holder of Apax US VII GP. Ltd., and as a result, may be deemed to beneficially own, and have shared voting and dispositive power with respect to, 1,066,405 shares of Common Stock, which represents 1.4% of the outstanding Common Stock (calculated based on the Calculation Method).

Prior to the vote of the shareholders of the Issuer with respect to the NASDAQ Shareholder Approval (as defined below), the Series B Preferred Stock may not be converted and the holders thereof may not vote on an as-converted basis with the holders of Common Stock. Further, prior to the receipt of the approval of the holders of Common Stock required for the removal of the Conversion Cap (as defined below) in compliance with NASDAQ Market Place Rule 5635(a), (b), (c) and (d) and NASDAQ Market Place Rule 5640, as applicable, or any similar shareholder approval rule (the “NASDAQ Shareholder Approval”), the shares of Series B Preferred Stock described herein shall not be convertible into, and the holders thereof shall not be entitled to exercise voting power with respect to, more than 19.99% of the number of shares of Common Stock outstanding immediately prior to January 10, 2011 (such limitation, the “Conversion Cap”). Dividends on each share of Series B Preferred Stock compound quarterly on each of March 15, June 15, September 15 and December 15 of each year and are added to the accrued value of such share used to calculate the number of shares of Common Stock into which such share may be converted and, therefore, subject to the prior to two sentences of this paragraph, the number of shares of Common Stock into which each share of Series B Preferred Stock may be converted is expected to increase over time.

On May 5, 2011 at the Annual Meeting of the Shareholders of the Issuer, the NASDAQ Shareholder Approval and all other necessary approvals required to remove the restrictions of the Conversion Cap were obtained. As of the date of this Amendment No. 4, the Series B Preferred Stock held by Investor is fully convertible at the Conversion Price and Investor is entitled to exercise voting power on an as-converted basis.

Neither the filing of the Schedule 13D (or any amendment or supplement thereto) nor any of its contents shall be deemed to constitute an admission by any Reporting Person, other than Investor (solely with respect to the shares of Series B Preferred Stock purchased by it pursuant to the First Closing and Second Closing of the Purchase Agreement), that it is the beneficial owner of any of the Series B Preferred Stock or Common Stock referred to herein for purposes of the Exchange Act, or for any other purpose, and such beneficial ownership is expressly disclaimed.

21

Other than Investor, the Reporting Persons are not entitled to any rights as shareholders of the Issuer.

Except as set forth in this Item 5(a), none of the Reporting Persons and, to the knowledge of the Reporting Persons, no person named inSchedule A hereto beneficially owns any Series B Preferred Stock or any Common Stock.

Item 7. Material to be Filed as Exhibits.

Item 7 of the Schedule 13D is amended and restated in its entirety as follows:

Exhibit 1	Joint Filing Undertaking, dated as of February 11, 2011, by and among the Reporting Persons, which amends and restates Exhibit 1 to the Original 13D in its entirety (incorporated by reference to Exhibit 1 of Amendment No. 1 filed by the Reporting Persons on May 19, 2011).
Exhibit 2	Amendment No. 1 to Joint Filing Undertaking, dated as of May 19, 2011, by and among the Reporting Persons (incorporated by reference to Exhibit 2 of Amendment No. 1 filed by the Reporting Persons on May 19, 2011).
Exhibit 3	Amendment No. 2 to Joint Filing Undertaking, dated as of December 19, 2011, by and among the Reporting Persons (incorporated by reference to Exhibit 3 of Amendment No. 2 filed by the Reporting Persons on December 19, 2011).

22

Exhibit 4	Amendment No. 3 to Joint Filing Undertaking, dated as of May 14, 2012, by and among the Reporting Persons (incorporated by reference to Exhibit 4 of Amendment No. 3 filed by the Reporting Persons on May 15, 2012).
Exhibit 5	Securities Purchase Agreement, dated as of January 10, 2011, by and among the Issuer and Investor (incorporated by reference to Exhibit 10.1 of the Form 8-K filed by the Issuer on January 12, 2011).
Exhibit 6	Equity Commitment Letter, dated as of January 10, 2011, by and among the Issuer, Investor and the Apax Funds (incorporated by reference to Exhibit 10.2 of the Form 8-K filed by the Issuer on January 12, 2011).
Exhibit 7	Statement with Respect to Shares of 8% Series B Convertible Participating Preferred Stock of the Issuer, dated as of January 31, 2011, filed by the Issuer with the Pennsylvania Corporation Bureau (incorporated by reference to Exhibit 10.3 of the Form 8-K filed by the Issuer on February 4, 2011).
Exhibit 8	Investment Rights Agreement, dated as of February 1, 2011, by and among the Issuer and Investor (incorporated by reference to Exhibit 10.1 of the Form 8-K filed by the Issuer on February 4, 2011).
Exhibit 9	Amended and Restated Voting and Standstill Agreement, dated as of February 1, 2011, by and among the Issuer, Investor and the Shareholders (incorporated by reference to Exhibit 10.2 of the Form 8-K filed by the Issuer on February 4, 2011).
Exhibit 10	Common Stock Purchase Agreement, dated as of May 1, 2012, by and among Investor and the Sellers (incorporated by reference to Exhibit 10 of Amendment No. 3 filed by the Reporting Persons on May 15, 2012).
Exhibit 11	Lock-up Agreement, dated as of April 30, 2012, by and between Investor and Jefferies (incorporated by reference to Exhibit 11 of Amendment No. 3 filed by the Reporting Persons on May 15, 2012).
Exhibit 12	Letter Agreement, dated as of May 14, 2012, by and between Investor and the Issuer (incorporated by reference to Exhibit 12 of Amendment No. 3 filed by the Reporting Persons on May 15, 2012).
Exhibit 13	Common Stock Purchase Agreement, dated as of March 6, 2013, by and between Investor and Mr. Murthy.

23

SIGNATURES

After reasonable inquiry and to the best of each of the undersigned’s knowledge and belief, each of the undersigned certify that the information set forth in this Statement is true, complete and correct.

Date: April 3, 2013

VISCARIA LIMITED
By:	/s/ Devora Har-Tuv
	Name: Devora Har-Tuv
	Title: Director
APAX EUROPE VI-A, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Martin Halusa
	Name: Martin Halusa
	Title: Authorized Signatory
By:	/s/ Nico Hansen
	Name: Nico Hansen
	Title: Director
APAX EUROPE VI-1, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Martin Halusa
	Name: Martin Halusa
	Title: Authorized Signatory
By:	/s/ Nico Hansen
	Name: Nico Hansen
	Title: Director

SIGNATURE PAGE TO FORM 13D FILING

APAX EUROPE VII-A, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Martin Halusa
	Name: Martin Halusa
	Title: Authorized Signatory
By:	/s/ Nico Hansen
	Name: Nico Hansen
	Title: Director
APAX EUROPE VII-B, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Martin Halusa
	Name: Martin Halusa
	Title: Authorized Signatory
By:	/s/ Nico Hansen
	Name: Nico Hansen
	Title: Director
APAX EUROPE VII-1, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Martin Halusa
	Name: Martin Halusa
	Title: Authorized Signatory
By:	/s/ Nico Hansen
	Name: Nico Hansen
	Title: Director
APAX US VII, L.P.
By:	Apax US VII GP L.P.
Its:	General Partner
By:	Apax US VII GP, Ltd.
Its:	General Partner
By:	/s/ John F. Megrue
	Name: John F. Megrue
	Title: Chief Executive Officer

SIGNATURE PAGE TO FORM 13D FILING

APAX EUROPE VI GP L.P. INC.
By:	Apax Europe VI GP Co. Limited
Its:	General Partner
By:	/s/ Andrew W. Guille
	Name: Andrew W. Guille
	Title: Director
APAX EUROPE VI GP CO. LIMITED
By:	/s/ Andrew W. Guille
	Name: Andrew W. Guille
	Title: Director
APAX EUROPE VII GP L.P. INC.
By:	Apax Europe VII GP Co. Limited
Its:	General Partner
By:	/s/ Andrew W. Guille
	Name: Andrew W. Guille
	Title: Director
APAX EUROPE VII GP CO. LIMITED
By:	/s/ Andrew W. Guille
	Name: Andrew W. Guille
	Title: Director
APAX GUERNSEY (HOLDCO) PCC LIMITED
By:	/s/ Andrew W. Guille
	Name: Andrew W. Guille
	Title: Director
APAX US VII GP, L.P.
By:	Apax US VII GP, Ltd.
Its:	General Partner
By:	/s/ John F. Megrue
	Name: John F. Megrue
	Title: Chief Executive Officer

SIGNATURE PAGE TO FORM 13D FILING

APAX US VII GP, LTD.
By:	/s/ John F. Megrue
	Name: John F. Megrue
	Title: Chief Executive Officer
APAX PARTNERS EUROPE MANAGERS LTD
By:	/s/ Martin Halusa
	Name: Martin Halusa
	Title: Authorized Signatory
By:	/s/ Nico Hansen
	Name: Nico Hansen
	Title: Director
JOHN F. MEGRUE
/s/ John F. Megrue
John F. Megrue

SIGNATURE PAGE TO FORM 13D FILING

SCHEDULE A

Set forth below is the name, citizenship, business address and the present principal occupation or employment (and the name and, to the extent not provided in the Schedule 13D to which thisSchedule A is attached, the principal business and address of any organization in which such employment is conducted) of each director and executive officer of the Reporting Persons who are corporations.

Name / Citizenship	Business Address	Entity / Present Principal Occupation or Employment	Principal Business / Business Address
Devora Har-Tuv (United States and Israel citizen)	Lemesou, 77 Elia House P.C. 2121, Nicosia, Cyprus	Viscaria Limited - Director
Vivesh Ramsamy Pillay (British citizen)	Lemesou, 77 Elia House P.C. 2121, Nicosia, Cyprus	Viscaria Limited - Director
Sokratis Kominakis (Greek citizen)	Lemesou, 77 Elia House P.C. 2121, Nicosia, Cyprus	Viscaria Limited - Director
Andreas Athinodorou (Cyprus citizen)	Lemesou, 77 Elia House P.C. 2121, Nicosia, Cyprus	Viscaria Limited - Director
Alexis Xenophontos (British citizen)	Lemesou, 77 Elia House P.C. 2121, Nicosia, Cyprus	Viscaria Limited - Director
Jeremy Arnold (Jersey citizen)	Third Floor, Royal Bank Place 1 Glategny Esplanade St Peter Port, Guernsey GY1 2HJ	Apax Europe VI GP Co. Limited - Director Apax Europe VII GP Co. Limited - Director Apax Guernsey (Holdco) PCC Limited - Director
Denise Fallaize (Guernsey citizen)	Third Floor, Royal Bank Place 1 Glategny Esplanade St Peter Port, Guernsey GY1 2HJ	Apax Europe VI GP Co. Limited - Director Apax Europe VII GP Co. Limited - Director Apax Guernsey (Holdco) PCC Limited - Director
Andrew Guille (Guernsey citizen)	Third Floor, Royal Bank Place 1 Glategny Esplanade St Peter Port, Guernsey GY1 2HJ	Apax Europe VI GP Co. Limited - Director Apax Europe VII GP Co. Limited - Director Apax Guernsey (Holdco) PCC Limited - Director
David Staples (Guernsey citizen)	Third Floor, Royal Bank Place 1 Glategny Esplanade St Peter Port, Guernsey GY1 2HJ	Apax Europe VI GP Co. Limited - Director Apax Europe VII GP Co. Limited - Director

Name / Citizenship	Business Address	Entity / Present Principal Occupation or Employment	Principal Business / Business Address
Martin Halusa (Austrian citizen)	33 Jermyn Street London, SW1Y 6DN United Kingdom	Apax Partners Europe Managers Ltd - Director
Ian Jones (British citizen)	33 Jermyn Street London, SW1Y 6DN United Kingdom	Apax Partners Europe Managers Ltd - Director
John F. Megrue (United States citizen)	601 Lexington Avenue 53rd Floor New York, New York 10022	Apax US VII GP, Ltd. - Director and CEO Apax Partners, L.P. - CEO	601 Lexington Avenue 53rd Floor New York, New York 10022
Nico Hansen (German citizen)	33 Jermyn Street London, SW1Y 6DN United Kingdom	Apax US VII GP, Ltd. - Vice President Apax Partners Europe Managers Ltd - Director Apax Partners, L.P. - Vice President
Michael Phillips (Canadian citizen)	Possartstr. 11, D-81679, Munich	Apax Partners Europe Managers Ltd - Director
Robert Marsden (United States citizen)	601 Lexington Avenue 53rd Floor New York, New York 10022	Apax US VII GP, Ltd. - CFO Apax Partners, L.P. - CFO
Christian Stahl (German citizen)	33 Jermyn Street London, SW1Y 6DN United Kingdom	Apax US VII GP, Ltd. - Vice President Apax Partners, L.P. - Vice President
William J. Gumina (United States citizen)	601 Lexington Avenue 53rd Floor New York, New York 10022	Apax US VII GP, Ltd. - Vice President Apax Partners, L.P. - Vice President
Mitchell L. Truwit (United States citizen)	601 Lexington Avenue 53rd Floor New York, New York 10022	Apax US VII GP, Ltd. - Vice President Apax Partners, L.P. - Vice President