Signatures of Reporting Persons
This Statement on Form 4 is filed by the Reporting Persons listed below.
July 2, 2019
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| TRIANGLE PRIVATE HOLDINGS II, LLC | |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Chairman |
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| TRIANGLE PRIVATE HOLDINGS I, LLC | |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Chairman |
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| TRIANGLE PRIVATE INVESTMENTS, LLC | |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Chairman |
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| SIRIS PARTNERS III, L.P. SIRIS PARTNERS III PARALLEL, L.P. | |
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| By: | Siris Partners GP III, L.P., its general partner |
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| By: | Siris GP HoldCo III, LLC, its general partner |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Managing Member |
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| SIRIS PARTNERS GP III, L.P. | |
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| By: | Siris GP HoldCo III, LLC, its general partner |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Managing Member |
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| SIRIS GP HOLDCO III, LLC | |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Managing Member |
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| SIRIS CAPITAL GROUP III, L.P. | |
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| By: | Siris Group GP, LLC, its general partner |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Manager |
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| SIRIS CAPITAL GROUP, LLC | |
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| By: | Siris Group GP, LLC, its managing member |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Manager |
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| SIRIS GROUP GP, LLC | |
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| By: | /s/ Peter Berger |
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| Name: | Peter Berger |
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| Title: | Manager |