X0306 4 2019-06-28 0001738177 Cambium Networks Corp CMBM 0001779900 Sheppeck Bryan C/O CAMBIUM NETWORKS, INC. 3800 GOLF ROAD, SUITE 360 ROLLING MEADOWS IL 60008 true Senior VP, Global Sales Ordinary Shares 2019-06-28 4 C 0 57532 A 57532 D Ordinary Shares 2019-06-28 4 C 0 3302 A 60834 D Class B Units 2019-06-28 4 C 0 350000 0 D Ordinary Shares 57532 0 D Class B Units 2019-06-28 4 C 0 50000 0 D Ordinary Shares 3302 0 D Stock Option (right to buy) 12 2019-06-28 4 A 0 70000 0 A 2029-06-23 Ordinary Shares 70000 70000 D Represents Class B Units of Vector Cambium Holdings (Cayman), LP ("VCH"), the issuer's parent. In connection with the issuer's Recapitalization (as described in the issuer's prospectus dated June 25, 2019) and upon consummation of the issuer's initial public offering, the reporting person's Class B Units were exchanged for Ordinary Shares of the issuer, on a value-for-value basis, based on the initial public offering price of $12. One-half of these Class B Units vested as follows: 25% vested on January 5, 2016, and the remaining 75% vested in 36 substantially equal monthly installments thereafter, subject to reporting person's continuous service as of each vesting date. The remaining half of these Class B Units vest upon completion of the issuer's Recapitalization and consummation of the issuer's initial public offering. One-half of these Class B Units vest as follows: 25% vested on October 1, 2017, and the remaining 75% vest in 36 substantially equal monthly installments thereafter, subject to reporting person's continuous service as of each vesting date. The remaining half of these Class B Units vest upon completion of the issuer's Recapitalization and consummation of the issuer's initial public offering. To the extent not satisfied as of the issuer's initial public offering, these Ordinary Shares are subject to the same time-based vesting conditions as the related Class B Units, described in footnote 4 of this Form 4. These Class B Units have no expiration date. This option vests as follows: 25% vests on June 23, 2020, and the remaining 75% vests in 12 equal quarterly installments on a quarterly basis thereafter, subject to reporting person's continued service as of each vesting date. /s/ Sally Rau, attorney-in-fact 2019-06-28