Exhibit 99.2

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-J Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation
	75 State Street
	Boston, MA 02109

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	INC Research Holdings, Inc. [INCR]

Date of Event Requiring
Statement (Month/Day/Year):	August 1, 2017

Designated Filer:	Advent International Corporation

Signature:

ADVENT INTERNATIONAL GPE VIII-J LIMITED PARTNERSHIP

By: GPE VIII GP (Delaware) Limited Partnership, its General Partner

By: Advent International GPE VIII, LLC, its General Partner

By: Advent International Corporation, its Manager

By:

/s/ Michael Ristaino

Name:

Michael Ristaino

Title:

Vice President of Finance – Fund Administration

August 11, 2017

Date

Page 1 of 6

Exhibit 99.2

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-A Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation
	75 State Street
	Boston, MA 02109

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	INC Research Holdings, Inc. [INCR]

Date of Event Requiring
Statement (Month/Day/Year):	August 1, 2017

Designated Filer:	Advent International Corporation

Signature:

ADVENT INTERNATIONAL GPE VIII-A LIMITED PARTNERSHIP

By: GPE VIII GP Limited Partnership, its General Partner

By: Advent International GPE VIII, LLC, its General Partner

By: Advent International Corporation, its Manager

By:

/s/ Michael Ristaino

Name:

Michael Ristaino

Title:

Vice President of Finance – Fund Administration

August 11, 2017

Date

Page 2 of 6

Exhibit 99.2

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-E Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation
	75 State Street
	Boston, MA 02109

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	INC Research Holdings, Inc. [INCR]

Date of Event Requiring
Statement (Month/Day/Year):	August 1, 2017

Designated Filer:	Advent International Corporation

Signature:

ADVENT INTERNATIONAL GPE VIII-E LIMITED PARTNERSHIP

By: GPE VIII GP Limited Partnership, its General Partner

By: Advent International GPE VIII, LLC, its General Partner

By: Advent International Corporation, its Manager

By:

/s/ Michael Ristaino

Name:

Michael Ristaino

Title:

Vice President of Finance – Fund Administration

August 11, 2017

Date

Page 3 of 6

Exhibit 99.2

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-G Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation
	75 State Street
	Boston, MA 02109

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	INC Research Holdings, Inc. [INCR]

Date of Event Requiring
Statement (Month/Day/Year):	August 1, 2017

Designated Filer:	Advent International Corporation

Signature:

ADVENT INTERNATIONAL GPE VIII-G LIMITED PARTNERSHIP

By: GPE VIII GP Limited Partnership, its General Partner

By: Advent International GPE VIII, LLC, its General Partner

By: Advent International Corporation, its Manager

By:

/s/ Michael Ristaino

Name:

Michael Ristaino

Title:

Vice President of Finance – Fund Administration

August 11, 2017

Date

Page 4 of 6

Exhibit 99.2

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-K Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation
	75 State Street
	Boston, MA 02109

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	INC Research Holdings, Inc. [INCR]

Date of Event Requiring
Statement (Month/Day/Year):	August 1, 2017

Designated Filer:	Advent International Corporation

Signature:

ADVENT INTERNATIONAL GPE VIII-K LIMITED PARTNERSHIP

By: GPE VIII GP Limited Partnership, its General Partner

By: Advent International GPE VIII, LLC, its General Partner

By: Advent International Corporation, its Manager

By:

/s/ Michael Ristaino

Name:

Michael Ristaino

Title:

Vice President of Finance – Fund Administration

August 11, 2017

Date

Page 5 of 6

Exhibit 99.2

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-L Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation
	75 State Street
	Boston, MA 02109

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	INC Research Holdings, Inc. [INCR]

Date of Event Requiring
Statement (Month/Day/Year):	August 1, 2017

Designated Filer:	Advent International Corporation

Signature:

ADVENT INTERNATIONAL GPE VIII-L LIMITED PARTNERSHIP

By: GPE VIII GP Limited Partnership, its General Partner

By: Advent International GPE VIII, LLC, its General Partner

By: Advent International Corporation, its Manager

By:

/s/ Michael Ristaino

Name:

Michael Ristaino

Title:

Vice President of Finance – Fund Administration

August 11, 2017

Date

Page 6 of 6

Advent International GPE VIII-J Limited Partnership 3