SIGNATURES OF REPORTING PERSONS
This Statement on Form 4 is filed by the Reporting Persons listed below.
Dated: August 5, 2019
SILVER PRIVATE HOLDINGS I, LLC
By: Silver Private Investments, LLC, its sole
member
By: /s/Peter Berger
-----------------------
Name: Peter Berger
Title: Authorized Signatory
SILVER PRIVATE INVESTMENTS, LLC
By: /s/Peter Berger
-----------------------
Name: Peter Berger
Title: Authorized Signatory
SIRIS PARTNERS III, L.P.
SIRIS PARTNERS III PARALLEL, L.P.
By: Siris Partners GP III, L.P., its general
partner
By: Siris GP HoldCo III, LLC, its general
partner
By: /s/Peter Berger
-----------------------
Name: Peter Berger
Title: Managing Member
SIRIS PARTNERS GP III, L.P.
By: Siris GP HoldCo III, LLC, its general
partner
By: /s/Peter Berger
-----------------------
Name: Peter Berger
Title: Managing Member
SIRIS GP HOLDCO III, LLC
By: /s/Peter Berger
-----------------------
Name: Peter Berger
Title: Managing Member
SIRIS CAPITAL GROUP III, L.P.
By: Siris Group GP, LLC, its general partner
By: /s/Peter Berger
-----------------------
Name: Peter Berger
Title: Manager
SIRIS CAPITAL GROUP, LLC
By: Siris Group GP, LLC, its managing member
By: /s/Peter Berger
-----------------------
Name: Peter Berger
Title: Manager
SIRIS GROUP GP, LLC
By: /s/Peter Berger
-----------------------
Name: Peter Berger
Title: Manager
Silver Private Holdings I
Filed: 5 Aug 19, 6:48pm