13D Filing: Siris Capital Group, LLC and Synchronoss Technologies Inc (SNCR)

This Amendment No. 3 to Schedule 13D (this Amendment
No. 3) amends and supplements the statement on Schedule 13D jointly filed by (i) Silver Private Holdings I, LLC, a Delaware limited liability company (Silver Holdings), (ii) Silver Private
Investments, LLC, a Delaware limited liability company (Silver Parent), (iii) Siris Partners III, L.P., a Delaware limited partnership (Siris Fund III), (iv) Siris Partners III Parallel, L.P., a Delaware limited
partnership (Siris Fund III Parallel), (v) Siris Partners GP III, L.P., a Delaware limited partnership (Siris Fund III GP), (vi) Siris GP HoldCo III, LLC, a Delaware limited liability company (Siris
Fund III GP HoldCo), (vii) Siris Capital Group III, L.P., a Delaware limited partnership (Siris Fund III Advisor), (viii) Siris Capital Group, LLC, a Delaware limited liability company (Siris Capital
Group), (ix) Siris Advisor HoldCo III, LLC, a Delaware limited liability company (Siris Fund III Advisor HoldCo); and (x) Siris Advisor HoldCo, LLC, a Delaware limited liability company (Siris Advisor
HoldCo) (collectively, the Reporting Persons) with the Securities and Exchange Commission (the Commission) on May 5, 2017 (as previously amended and as may be amended from time to time, this
Schedule 13D), relating to the common stock, $0.0001 par value per share (the Common Stock), of Synchronoss Technologies, Inc. (the Company). Initially capitalized terms used in this Amendment
No. 3 that are not otherwise defined herein shall have the same meanings attributed to them in the Schedule 13D.

Item 4. Purpose of Transaction

Item 4 is hereby amended by the addition of the following immediately prior to the penultimate paragraph thereof:

On September 15, 2017, Siris Capital Group informed the Company that the Reporting Persons are no longer interested in pursuing an all-cash
acquisition of the Company and, accordingly, the indication of interest set forth in the June 22 Letter is withdrawn. The Reporting Persons are prepared to consider other forms of a Potential Transaction.