Sec Form 4 Filing - Ryan Ronald G @ Cambium Networks Corp - 2019-06-28

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Ryan Ronald G 2. Issuer Name and Ticker or Trading Symbol Cambium Networks Corp [ CMBM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Senior VP, Gbl Channel Mgmt (Last) (First) (Middle) C/O CAMBIUM NETWORKS, INC., 3800 GOLF ROAD, SUITE 360 3. Date of Earliest Transaction (MM/DD/YY) 06/28/2019 (Street) ROLLING MEADOWS, IL60008 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Ordinary Shares 06/28/2019 C( 2 ) 3,061 A 3,061 D Ordinary Shares 06/28/2019 C( 2 ) 8,802 A 11,863 D Ordinary Shares 06/28/2019 C( 2 ) 4,566 ( 8 ) A 16,429 D Ordinary Shares 06/28/2019 C( 2 ) 6,308 ( 9 ) A 22,737 D Ordinary Shares 06/28/2019 C( 2 ) 738 ( 10 ) A 23,475 D

7. Title and Amount of Underlying Securities (Instr. 3 and 4) Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class B Units ( 1 ) ( 2 ) 06/28/2019 C( 2 ) 22,500 ( 3 ) ( 11 ) Ordinary Shares 3,061 ( 13 ) $ 0 0 D Class B Units ( 1 ) ( 2 ) 06/28/2019 C( 2 ) 50,000 ( 4 ) ( 11 ) Ordinary Shares 8,802 $ 0 0 D Class B Units ( 1 ) ( 2 ) 06/28/2019 C( 2 ) 27,500 ( 5 ) ( 11 ) Ordinary Shares 4,566 $ 0 0 D Class B Units ( 1 ) ( 2 ) 06/28/2019 C( 2 ) 40,000 ( 6 ) ( 11 ) Ordinary Shares 6,308 $ 0 0 D Class B Units ( 1 ) ( 2 ) 06/28/2019 C( 2 ) 20,000 ( 7 ) ( 11 ) Ordinary Shares 738 ( 13 ) $ 0 0 D Stock Option (right to buy) $ 12 06/28/2019 A 50,000 ( 12 ) 06/23/2029 Ordinary Shares 50,000 $ 0 50,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Ryan Ronald G C/O CAMBIUM NETWORKS, INC. 3800 GOLF ROAD, SUITE 360 ROLLING MEADOWS, IL60008 Senior VP, Gbl Channel Mgmt Signatures /s/ Sally Rau, attorney-in-fact 06/28/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents Class B Units of Vector Cambium Holdings (Cayman), LP ("VCH"), the issuer's parent. ( 2 )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. ( 3 )These Class B Units vested as follows: 25% vested on April 1, 2014, and the remaining 75% vested in 36 substantially equal monthly installments thereafter, subject to reporting person's continuous service as of each vesting date. ( 4 )These Class B Units vested as follows: 25% vested on April 11, 2015, and the remaining 75% vested in 36 substantially equal monthly installments thereafter, subject to reporting person's continuous service as of each vesting date. ( 5 )These Class B Units vest as follows: 25% vested on November 1, 2016, and the remaining 75% vest in 36 substantially equal monthly installments thereafter, subject to reporting person's continuous service as of each vesting date. ( 6 )One-half of these Class B Units vest as follows: 25% vested on April 13, 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. ( 7 )One-half of these Class B Units vest as follows: 25% vested on February 13, 2018, 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. ( 8 )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 5 of this Form 4. ( 9 )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 6 of this Form 4. ( 10 )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 7 of this Form 4. ( 11 )These Class B Units have no expiration date. ( 12 )This option vests as follows: 25% vested on February 6, 2019, 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. ( 13 )These figures were inadvertently rounded down in the reporting person's Form 3, filed June 25, 2019, and have been corrected herein, for an aggregate change of 3 Ordinary Shares.

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