F1Following the reported transaction, consists of (i) 18,438,796 shares held of record by Columbia Capital Equity Partners IV (QP), L.P. ("CCEP IV (QP)"), (ii) 2,268,662 shares held of record by Columbia Capital Equity Partners IV (QPCO), L.P. ("CCEP IV (QPCO)"), (iii) 140,253 shares held of record by Columbia Capital Employee Investors IV, L.P. ("CCEI IV"), (iv) 236,925 shares held of record by Columbia Capital Equity Partners III (QP), L.P. ("CCEP III (QP)"), (v) 130,108 shares held of record by Columbia Capital Equity Partners III (Cayman) L.P. ("CCEP III (Cayman)"), (vi) 13,088 shares held of record by Columbia Capital Equity Partners III (AI), L.P. ("CCEP III (AI)"), (vii) 58,459 shares held of record by Columbia Capital Investors III, L.L.C. ("CCI III") and (viii) 2,315 shares held of record by Columbia Capital Employee Investors III, L.L.C. ("CCEI III") (collectively, the "Columbia Entities"). (continued)
F2(continued from footnote 1) Columbia Capital Equity Partners IV, L.P. ("CCEP IV") is the general partner of CCEP IV (QP) and CCEP IV (QPCO). Columbia Capital IV, LLC ("CC IV") is the general partner of CCEP IV and CCEI IV. CC IV has sole voting and investment power over the shares held directly and indirectly by the entities of which it is the general partner as described above. James B. Fleming, Jr. controls CC IV, and as a result, he exercises voting and investment control over all the shares held by CCEP IV (QP), CCEP IV (QPCO) and CCEI IV. The general partner of CCEP III (Cayman) is Columbia Capital Equity Partners (Cayman) III, Ltd. Columbia Capital Equity Partners III, L.P. ("CCEP III") is the sole stockholder of Columbia Capital Equity Partners (Cayman) III, Ltd. and is also the managing member of CCI III and CCEI III. CCEP III is also the general partner of CCEP III (QP) and CCEP III (AI). The general partner of CCEP III is Columbia Capital III, LLC ("CCIII"). (continued)
F3(continued from footnote 2) Mr. Fleming controls CCIII, and as a result, he exercises voting and investment control over all the shares held by CCEP III (QP), CCEP III (AI), CCEP III (Cayman), CCI III and CCEI III. Each of the foregoing entities and Mr. Fleming disclaims beneficial ownership of the shares held of record by the Columbia Entities, except to the extent of their or his pecuniary interest therein, and this report shall not be deemed an admission that they or he is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.
F4Due to the limitations of the electronic filing system, Columbia Capital Equity Partners III (AI), L.P., Columbia Capital Investors III, L.L.C., Columbia Capital Employee Investors III, L.L.C., Columbia Capital Equity Partners (Cayman) III, Ltd. and James B. Fleming, Jr. are filing a separate Form 4.