X0206 3 2017-10-27 0 0001708055 Sonus Networks, Inc. SONS 0000019617 JPMORGAN CHASE & CO 270 PARK AVENUE, 10TH FLOOR NEW YORK NY 10017 0 0 1 0 0001498053 OEP III Co-Investors, L.P. 270 PARK AVENUE, 10TH FLOOR, NEW YORK NY 10017 0 0 1 0 0001721820 OEP II Partners Co-Invest, L.P. 510 MADISON AVE., 19TH FLOOR, NEW YORK NY 10022 0 0 1 0 0001721804 Heritage PE (OEP) III, L.P. 270 PARK AVENUE, 10TH FLOOR, NEW YORK NY 10017 0 0 1 0 Common Stock 49940222 I See footnotes OEP III Co-Investors and OEP II Partners Co-Invest are the record holders of 1,142,007 and 1,749,504 shares of Common Stock, respectively. Heritage III is the record holder of 47,048,711 shares of Common Stock. JPMorgan Chase & Co. is a publicly traded entity listed on the New York Stock Exchange, which is the sole member of JP Morgan Chase Holdings LLC, which is the sole member of Banc One Financial LLC, which is the sole member of OEP Holdings LLC, which is the sole member of JPMC Heritage Parent LLC, which is the general partner of OEP General Partner III L.P., which is the general partner of Heritage PE (OEP) III, L.P. As such, each of OEP Holdings LLC, JPMC Heritage Parent LLC and OEP General Partner III L.P. may be deemed to have or share beneficial ownership of the Common Stock held directly by Heritage PE (OEP) III, L.P. OEP III Co-Investors, L.P. and OEP II Partners Co-Invest, L.P. are subject to certain contractual agreements and statutory obligations to acquire and vote shares side-by-side with Heritage PE (OEP) III, L.P. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein. JPMorgan Chase & Co. By: /s/ Michael T. Lees, Executive Director 2017-11-06 OEP III Co-Investors, L.P. By: OEP Co-Investors Management III, Ltd., as General Partner, By: /s/ Richard W. Smith, President 2017-11-06 OEP II Partners Co-Invest, L.P. By: OEP II Partners Co-Invest GP, Ltd., as General Partner, By: /s/ Richard M. Cashin, Director 2017-11-06 Heritage PE (OEP) III, L.P. By: OEP General Partner III, L.P., as General Partner, By: JPMC Heritage Parent LLC, as General Partner, By: /s/ Richard W. Smith, President 2017-11-06