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

---

Item 1.

Security and Issuer

This statement on Schedule 13D (this Schedule 13D) relates to
the common stock, $0.0001 par value per share (the Common Stock), of Synchronoss Technologies, Inc., a Delaware corporation (the Company). The principal executive offices of the Company are located at 200
Crossing Boulevard, 8th Floor, Bridgewater, New Jersey 08807. As reported in the Companys proxy statement filed with the Securities and Exchange Commission (the Commission) on April 6, 2017, as of March 27, 2017,
there were 46,372,470 shares of Common Stock outstanding.

Item 2.

Identity and Background

(a) This Schedule 13D is being filed jointly on behalf of the following persons
(collectively, the Reporting Persons):

(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).

Silver 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. 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, each a United States citizen. The agreement among the Reporting Persons relating to the joint filing of this Schedule 13D
is attached to this Schedule 13D as Exhibit 99.1.

(b) The business address of each of the persons listed in this Item 2 is c/o Siris Capital Group,
LLC, 601 Lexington Avenue, 59th Floor, New York, NY 10022.

(c) The principal business of Silver Holdings is to invest from time to time in the securities
of the Company. The principal business of Silver Parent is to serve as the sole member of Silver Parent. Siris Fund III and Siris Fund III Parallel are private equity funds, the principal business of which is to make investments. The principal
business of Siris Fund III GP is to serve as the general partner of Siris Fund III and Siris Fund III Parallel and related investment vehicles. The principal business of Siris Fund III GP HoldCo is to serve as the general partner of Siris Fund III
GP. The principal business of Siris Fund III Advisor is to serve as the investment manager of Siris Fund III and Siris Fund III Parallel. The principal business of Siris Fund III Advisor HoldCo is to serve as the general partner of Siris