Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Series A Convertible Participating Perpetual Preferred Stock^{F7,F11,F1,F2,F3,F4,F5,F6,F8}	$18.00	Feb 15, 2018	P	185,000	A	—	—	Common Stock, par value $0.0001 per share	10,277,786	185,000	D
Stock Option (Right to Purchase)^F9	$7.48	Feb 15, 2018	J	30,000	A	—	Feb 14, 2025	Common Stock, par value $0.0001 per share	30,000	30,000	D
Stock Option (Right to Purchase)^F10	$7.48	Feb 15, 2018	J	30,000	A	—	Feb 14, 2025	Common Stock, par value $0.0001 per share	30,000	30,000	D

Explanation of responses

F1This Form 4 is being jointly filed by and on behalf of each of the following persons (each, a "Reporting Person"): (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");
F10On February 15, 2018, the Issuer awarded a stock option to purchase shares of Common Stock to Frank Baker, which becomes exercisable with respect to one-third of the shares subject to the stock option when Mr. Baker completes each year of continuous service after February 15, 2018. Pursuant to an assignment agreement between Siris Capital Group, Mr. Baker and the Issuer, dated as of February 15, 2018, Mr. Baker has assigned to Siris Capital Group all of his right, title and interest in and to any compensation, including equity awards, he receives from the Issuer for his services as a director of the Issuer.
F11Pursuant to Rule 16b-6(c)(2) of the Exchange Act, there is no profit with respect to such transactions.
F2(Continued from Footnote 1) and (x) Siris Advisor HoldCo, LLC, a Delaware limited liability company ("Siris Advisor HoldCo").
F3Silver Holdings is controlled by its sole member, Silver Parent. Silver Parent is controlled by its members, Siris Fund III and Siris Fund III Parallel. Each of Siris Fund III and Siris Fund III Parallel is controlled by its general partner, Siris Fund III GP. Siris Fund III GP is controlled by its general partner, Siris Fund III GP HoldCo. Siris Fund III Advisor serves as investment manager to Siris Fund III and Siris Fund III Parallel pursuant to investment management agreements with each of them. Siris Capital Group shares investment management authority in respect of Siris Fund III and Siris Fund III Parallel pursuant to an agreement between Siris Fund III Advisor and Siris Capital Group. Siris Fund III Advisor is controlled by its general partner, Siris Fund III Advisor HoldCo.
F4(Continued from Footnote 3) Siris Capital Group is controlled by its managing member, Siris Advisor HoldCo. Each of Siris Fund III GP HoldCo, Siris Fund III Advisor HoldCo and Siris Advisor HoldCo is controlled by Frank Baker, Peter Berger and Jeffrey Hendren.
F5The 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 (such Act and rules, as amended, the "Exchange Act"), which group may be deemed to share the power to vote or direct the vote, or to dispose or direct the disposition, of the securities reported herein. However, neither the filing of this Form 4 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, for purposes of Section 16 of the Exchange Act or for any other purpose.
F6(Continued from footnote 5) 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 Person's management and control. Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person. As permitted by Rule 16a-1(a)(4), the filing of this Form 4 shall not be construed as an admission that any of the Reporting Persons are beneficial owners of any of the securities covered by this statement.
F7On February 15, 2018, pursuant to that certain Securities Purchase Agreement, dated as of October 17, 2017, between Synchronoss Technologies, Inc. (the "Issuer") and Silver Holdings, the Issuer issued to Silver Holdings 185,000 shares of preferred stock of the Issuer, par value $0.0001 per share, with an initial liquidation preference of $1,000 per share, which was designated as Series A Convertible Participating Perpetual Preferred Stock (the "Series A Preferred Stock"), for consideration consisting of (i) $97.7 million in cash and (ii) the transfer from Silver Holdings to the Issuer of the 5,994,667 shares of common stock, par value $0.0001 per share (the "Common Stock"), reported herein.
F8Each share of Series A Preferred Stock may be converted on any date, from time to time, at the option of the holder thereof, and has no expiration date. The number of shares of Common Stock reported herein represents the number of shares of Common Stock that would be issuable upon conversion of the 185,000 shares of Series A Preferred Stock held by Silver Holdings.
F9On February 15, 2018, the Issuer awarded a stock option to purchase shares of Common Stock to Peter Berger, which becomes exercisable with respect to one-third of the shares subject to the stock option when Mr. Berger completes each year of continuous service after February 15, 2018. Pursuant to an assignment agreement between Siris Capital Group, Mr. Berger and the Issuer, dated as of February 15, 2018, Mr. Berger has assigned to Siris Capital Group all of his right, title and interest in and to any compensation, including equity awards, he receives from the Issuer for his services as a director of the Issuer.

Remarks

For purposes of Section 16 of the Exchange Act, the Reporting Persons may be deemed to be directors by deputization by virtue of their right to appoint directors to the board of directors of the Issuer. As a result, the "Director" box is marked in Item 5 of this Form 4.