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

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There can be no assurance as to the outcome of any of the discussions referred to in this Schedule 13D, including
whether such discussions will occur, whether a Potential Transaction will be agreed between the parties, or any of the terms, structure or timing of any such Potential Transaction.

Other than as described in this Item 4, or as would occur upon completion of any of the matters discussed herein, none of the Reporting Persons has any
current plans or proposals that relate to or that would result in any of the transactions or other matters specified in clauses (a) through (j) of Item 4 of Schedule 13D; provided, that the Reporting Persons, at any time and from time to time,
may review or reconsider and change their positions and/or intentions.

Item 5.

Interest in Securities of the Issuer

(a)-(b) The aggregate number and percentage of shares of Common
Stock of the Company to which this Schedule 13D relates is 5,994,667 shares, constituting approximately 12.93% of the Companys outstanding shares of Common Stock. This percentage is based on an aggregate of 46,372,470 shares of Common Stock
outstanding as of March 27, 2017, as provided by the Company in its proxy statement filed with the Commission on April 6, 2017. All of the Shares are held by Silver Holdings. None of the other Reporting Persons holds any shares of Common
Stock.

The Reporting Persons may be deemed to be members of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934, as
amended, and the rules and regulations thereunder, which group may be deemed to share the power to vote or direct the vote, or to dispose or direct the disposition, of the Shares. However, neither the filing of this Schedule 13D nor any of its
contents shall be deemed to constitute an admission by any of the Reporting Persons that it is a member of a group for such purposes or for any other purpose. Each of the Reporting Persons expressly disclaims beneficial ownership of
securities held by any other person or entity other than, to the extent of any pecuniary interest therein, the various accounts under such Reporting Persons management and control.

(c) Schedule I hereto, which is incorporated herein by reference, sets forth the transactions in the Common Stock that were effected in the past 60 days by
the Reporting Persons. All of such transactions were effected in open market transactions.

(d) No person other than the Reporting Persons is known to the
Reporting Persons to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Shares.

(e)
Not applicable.

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer

Except as described herein, the Reporting Persons have no contracts, arrangements, understandings or relationships (legal or otherwise) with respect to any
securities of the Company.

Item 7.

Material to be Filed as Exhibits