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

EXHIBIT 4

AMENDMENT NO. 3 TO SCHEDULE 13D JOINT FILING UNDERTAKING

In accordance with the requirements of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and subject to the limitations set forth therein, the parties set forth below agree to jointly file the Amendment No. 3 to Schedule 13D to which this joint filing undertaking is attached, and any amendments thereto, and have duly executed this joint filing agreement as of the date set forth below.

The execution and filing of this joint filing undertaking shall not be construed as an admission that the below-named parties are a group, or have agreed to act as a group.

Dated: May 14, 2012

VISCARIA LIMITED
By:	/s/ Viveshan Ramsamy Pillay
	Name: Viveshan Ramsamy Pillay
	Title: Director
APAX EUROPE VI-A, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Andrew Sillitoe
	Name: Andrew Sillitoe
	Title: Authorized Signatory
By:	/s/ Ian Jones
	Name: Ian Jones
	Title: Director
APAX EUROPE VI-1, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Andrew Sillitoe
	Name: Andrew Sillitoe
	Title: Authorized Signatory
By:	/s/ Ian Jones
	Name: Ian Jones
	Title: Director

SIGNATURE PAGE TO JOINT FILING UNDERTAKING

APAX EUROPE VII-A, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Andrew Sillitoe
	Name: Andrew Sillitoe
	Title: Authorized Signatory
By:	/s/ Ian Jones
	Name: Ian Jones
	Title: Director
APAX EUROPE VII-B, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Andrew Sillitoe
	Name: Andrew Sillitoe
	Title: Authorized Signatory
By:	/s/ Ian Jones
	Name: Ian Jones
	Title: Director
APAX EUROPE VII-1, L.P.
By:	Apax Partners Europe Managers Limited
Its:	Manager
By:	/s/ Andrew Sillitoe
	Name: Andrew Sillitoe
	Title: Authorized Signatory
By:	/s/ Ian Jones
	Name: Ian Jones
	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: CEO

SIGNATURE PAGE TO JOINT FILING UNDERTAKING

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: CEO
APAX US VII GP, LTD.
By:	/s/ John F. Megrue
	Name: John F. Megrue
	Title: CEO

SIGNATURE PAGE TO JOINT FILING UNDERTAKING

APAX PARTNERS EUROPE MANAGERS LTD
By:	/s/ Andrew Sillitoe
	Name: Andrew Sillitoe
	Title: Authorized Signatory
By:	/s/ Ian Jones
	Name: Ian Jones
	Title: Director
JOHN F. MEGRUE
/s/ John F. Megrue
John F. Megrue

SIGNATURE PAGE TO JOINT FILING UNDERTAKING