Exhibit A

AGREEMENT REGARDING THE JOINT FILING OF SCHEDULE 13D

Pursuant to Rule 13(d)-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, each of the undersigned acknowledges and agrees that the foregoing statement on Schedule 13D is filed on behalf of the undersigned and that all subsequent amendments to this statement on Schedule 13D shall be filed on behalf of the undersigned without the necessity of filing additional joint acquisition statements. Each of the undersigned acknowledges that it shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

WP TRITON CO-INVEST, L.P.
By:	Warburg Pincus (Cayman) Global Growth GP, L.P., its general partner
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WP TRITON INVESTMENT, L.P.
By:	Warburg Pincus (Cayman) Global Growth GP, L.P., its general partner
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS (CALLISTO-A) GLOBAL GROWTH (CAYMAN), L.P.
By:	Warburg Pincus (Cayman) Global Growth GP, L.P., its general partner
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS (EUROPA) GLOBAL GROWTH (CAYMAN), L.P.
By:	Warburg Pincus (Cayman) Global Growth GP, L.P., its general partner
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory

WARBURG PINCUS GLOBAL GROWTH-B (CAYMAN), L.P.
By:	Warburg Pincus (Cayman) Global Growth GP, L.P., its general partner
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS GLOBAL GROWTH-E (CAYMAN), L.P.
By:	Warburg Pincus (Cayman) Global Growth GP, L.P., its general partner
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS GLOBAL GROWTH PARTNERS (CAYMAN), L.P.
By:	Warburg Pincus (Cayman) Global Growth GP, L.P., its general partner
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory

WP GLOBAL GROWTH PARTNERS (CAYMAN), L.P.
By:	Warburg Pincus (Cayman) Global Growth GP, L.P., its general partner
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS (CAYMAN) GLOBAL GROWTH GP, L.P.
By:	Warburg Pincus (Cayman) Global Growth GP LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS (CAYMAN) GLOBAL GROWTH GP LLC
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS PARTNERS II (CAYMAN), L.P.
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS (BERMUDA) PRIVATE EQUITY GP LTD.
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory

WARBURG PINCUS LLC
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	General Counsel and Managing Director